Efficient heat exchanger capable of preventing high-viscosity waste oil from being blocked

Abstract

The invention discloses a high-efficiency heat exchanger capable of preventing high-viscosity waste oil from being blocked, relates to the field of heat exchangers, and solves the problems that the inner wall of a constant-flow-speed device is easy to scale when the high-efficiency heat exchanger is used, and impurities on the inner wall are difficult to continuously assist in cleaning in the using process, the high-efficiency heat exchanger comprises a base, an inner cylinder, a shell cylinder, a heat exchange mechanism and an impurity removal mechanism, the heat exchange mechanism comprises a spiral plate and a rubber gasket, a conveying cavity used for conveying refrigerants is formed in the spiral plate, waste oil is conveyed from top to bottom along the spiral plate through the heat exchange mechanism, the flow speed and shearing force of the waste oil are changed, impurity deposition is reduced, heat transfer is conducted between the waste oil and the refrigerants in the conveying cavity, and energy utilization is achieved; and the impurity removing mechanism drives the shell barrel to rotate slowly, so that the outer wall of the spiral plate and the rubber gasket slide relatively, impurities adhered to the inner wall of the rubber gasket are scraped in an auxiliary mode, accumulation of the impurities is reduced, and blockage is avoided.

Description

Technical Field

[0001] This invention relates to the field of heat exchanger technology, specifically to a high-efficiency heat exchanger that prevents clogging by high-viscosity waste oil. Background Technology

[0002] Waste mineral oil regeneration is an important direction for industrial solid waste resource utilization and energy conservation. The regeneration process requires waste heat recovery from the high-temperature waste oil to reduce system energy consumption and improve economic efficiency. Currently, most mainstream waste heat recovery equipment uses shell-and-tube, plate, or conventional spiral plate heat exchangers. However, when treating high-viscosity waste mineral oil containing gum, asphalt, and solid impurities, these exchangers generally suffer from technical bottlenecks such as easy wall adhesion, coking, flow channel blockage, rapid decline in heat exchange efficiency, and frequent shutdowns for cleaning.

[0003] While conventional fixed spiral plate heat exchangers have continuous flow channels and no obvious dead zones, their static flow channels lack sufficient shear force for high-viscosity waste oil. Impurities easily deposit on the heat exchange surface, forming scale, which significantly increases thermal resistance and reduces heat transfer efficiency. Shell-and-tube heat exchangers have dead zones in the tube bundles and material accumulation areas in the baffles, making them more susceptible to blockage by viscous waste oil. Cleaning blockages requires disassembling the equipment, resulting in high maintenance costs and poor continuity. Existing anti-clogging solutions mostly rely on chemical cleaning, online flushing, or widening of the flow channels, which can only alleviate blockages and cannot achieve continuous self-cleaning from a structural perspective. Furthermore, they are prone to causing secondary pollution of waste oil and heat loss. Summary of the Invention

[0004] The purpose of this invention is to provide a high-efficiency heat exchanger that can prevent high-viscosity waste oil from clogging, while facilitating the reduction of impurity accumulation and continuous self-cleaning of adhered impurities, in order to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a high-efficiency heat exchanger for preventing blockage of high-viscosity waste oil, comprising a base, a heat exchange mechanism, and a purification mechanism. An inner cylinder is fixedly connected to the base, and an outer shell is rotatably connected to the base. The heat exchange mechanism includes a spiral plate fixedly installed on the outer wall of the inner cylinder, the pitch of which changes periodically. A rubber gasket is provided on the inner wall of the outer shell, and the outer wall of the spiral plate slides against the inner wall of the rubber gasket. A conveying chamber for conveying refrigerant is provided inside the spiral plate. The structure can transport waste oil from top to bottom along the spiral plate, changing the flow rate and shear force of the waste oil, reducing impurity deposition, and transferring heat with the refrigerant inside the conveying chamber to realize energy utilization. The impurity removal mechanism is installed on the base and is used to drive the outer shell cylinder to rotate slowly, so that the outer wall of the spiral plate and the rubber liner slide relative to each other, assisting in scraping off the impurities adhering to the inner wall of the rubber liner, reducing the accumulation of impurities, avoiding blockage, and facilitating continuous self-cleaning of adhering impurities while reducing impurity accumulation.

[0006] Preferably, the heat exchange mechanism further includes a threaded sleeve rotatably connected to the outer wall of the top of the outer shell cylinder. An input pipe is provided on the upper side of the outer shell cylinder. The outer wall of the input pipe can be threadedly connected to the inner wall of the threaded sleeve. An outlet pipe is fixedly connected to the input pipe. A conical block is fixedly connected to the bottom end of the outlet pipe. An insertion block is fixedly connected to the bottom of the conical block. An insertion groove is provided at the top of the inner cylinder, which can be inserted into the insertion block in the vertical direction. The base is provided with a conveying component for assisting in the conveying and communication of refrigerant and waste oil. This facilitates the conveying of waste oil from top to bottom along the spiral plate, changing the flow rate and shear force of the waste oil, reducing impurity deposition, and enabling heat transfer with the refrigerant inside the conveying chamber to realize energy utilization.

[0007] Preferably, the conveying component includes a base plate fixedly installed at the bottom of the outer casing, a collection frame fixedly connected to the base, both the base plate and the collection frame being annular, a volute fixedly connected between the base and the bottom of the inner casing, the bottom of the inner casing communicating with the input end of the volute, the bottom end of the conveying chamber communicating with the output end of the volute, the upper and lower sides of the base plate respectively conforming to and rotating with the surfaces of the volute and the collection frame, and multiple sets of connecting holes connected to the collection frame provided on the base plate to facilitate the conveying and communication of refrigerant and waste oil.

[0008] Preferably, the heat exchange mechanism further includes a liquid inlet pipe fixedly installed on the input pipe and the conical block, a first pipe that can be inserted and communicated with the bottom end of the liquid inlet pipe on the inner cylinder, a conveying groove that communicates with the bottom end of the liquid outlet pipe in the conical block, a second pipe that connects the upper end of the conveying chamber and the conveying groove on the inner cylinder, and an output pipe that is connected to the side of the collection frame to facilitate the communication and conveying of refrigerant.

[0009] Preferably, the impurity removal mechanism includes a metal mesh tube fixedly installed on the outer wall of the rubber liner. Multiple guide strips are fixedly connected to the outer wall of the metal mesh tube, allowing it to slide vertically along the inner wall of the outer casing. A rubber ring is fixedly connected to the top end of the metal mesh tube, and a connecting ring is fixedly connected to the bottom end. Multiple threaded rods are rotatably connected inside the outer casing. A lifting ring is slidably connected to the inner wall of the outer casing along the vertical direction. All threaded rods pass through the lifting ring and are threadedly connected to it. The base is equipped with a drive component for controlling the rotation of the threaded rods and the outer casing, facilitating the slow rotation of the outer casing. This causes relative sliding between the outer wall of the spiral plate and the rubber liner, assisting in scraping away impurities adhering to the inner wall of the rubber liner, reducing impurity accumulation, and preventing blockage.

[0010] Preferably, the driving component includes a double-sided gear ring rotatably connected to the outer wall of the outer casing. Multiple sets of tooth blocks are evenly distributed on both the inner and outer walls of the double-sided gear ring. A first gear meshing with the inner wall of the double-sided gear ring is coaxially fixedly connected to the bottom end of the threaded rod. A first motor and a second motor are fixedly connected to the base. A second gear is coaxially fixedly connected to the output end of the second motor. The second gear meshes with the outer wall of the double-sided gear ring. The outer casing is provided with a control component for controlling the rotational state of the outer casing and the double-sided gear ring, facilitating the control of the rotational state of the threaded rod and the outer casing.

[0011] Preferably, the impurity removal mechanism further includes a drive shaft fixedly installed at the output end of the first motor. An impeller is rotatably connected inside the volute. The drive shaft passes through the volute and is rotatably connected to the volute. The drive shaft passes through the impeller and is coaxially fixedly connected to the impeller. The upper end of the drive shaft is driven by a speed reducer to a stirring shaft. The top end of the stirring shaft is rotatably connected to the inner wall of the inner cylinder. A third gear is fixedly connected to the outer wall of the drive shaft. An internal gear ring is fixedly connected to the bottom of the base plate. The third gear is driven by the speed reducer to the internal gear ring, which facilitates the operation of the equipment.

[0012] Preferably, the control component includes an electric telescopic rod fixedly installed on the outer shell cylinder. The telescopic end of the electric telescopic rod is fixedly connected to a lifting frame. Spring latches are provided on both the upper and lower sides of the lifting frame. A first slot is provided on the base so as to be inserted into the lower spring latch. Multiple sets of second slots are provided on the bottom surface of the double-sided gear ring so as to be inserted into the upper spring latch, which facilitates the control of the rotation state of the outer shell cylinder and the double-sided gear ring.

[0013] Preferably, a sloped panel is fixedly connected to the inner wall of the input pipe on the side of the conical block away from the conveying trough, and the liquid inlet pipe is located on the side away from the conveying trough, which facilitates the reduction of temperature and heat exchange between the high-temperature waste oil and the newly input refrigerant, and prevents it from affecting the efficiency of the refrigerant that is about to be output to continue to heat up.

[0014] Preferably, the conveying chamber is located slightly above the cross-section in the thickness direction of the spiral plate. Since the waste oil mainly flows along the top surface of the spiral plate, it facilitates efficient heat exchange for the downward-flowing waste oil.

[0015] Compared with the prior art, the beneficial effects of the present invention are: This invention provides a high-efficiency heat exchanger for preventing blockage of high-viscosity waste oil. It solves the problems of constant flow rate, easy scaling on the inner wall, and difficulty in continuous auxiliary cleaning of impurities during use of conventional high-efficiency heat exchangers. The waste oil is transported from top to bottom along a spiral plate via a heat exchange mechanism, changing the flow rate and shear force of the waste oil, reducing impurity deposition, and facilitating heat transfer with the refrigerant inside the transport chamber to utilize energy. A cleaning mechanism drives the outer shell to rotate slowly, causing relative sliding between the outer wall of the spiral plate and the rubber gasket, thus scraping away impurities adhering to the inner wall of the rubber gasket, reducing impurity accumulation and preventing blockage. This device features a large flow rate, high shear force, and no stagnant areas, effectively achieving anti-blockage functionality. Simultaneously, the slow rotation of the outer shell enables continuous self-cleaning of impurities on the inner wall and facilitates the disassembly and replacement of the rubber gasket. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the internal structure of the outer shell of the present invention; Figure 3 for Figure 2 Enlarged view of region A in the middle; Figure 4 for Figure 2 Enlarged view of region B in the middle; Figure 5 This is a partial structural diagram of the heat exchange mechanism of the present invention; Figure 6 for Figure 5 Enlarged view of region C; Figure 7 This is a partial structural diagram of the impurity removal mechanism of the present invention; Figure 8 for Figure 7 Enlarged view of region D in the middle; Figure 9 for Figure 7 Enlarged view of region E in the middle; Figure 10 This is a partial structural exploded view of the heat exchange mechanism of the present invention; Figure 11 for Figure 10 Enlarged view of the F region.

[0017] In the diagram: 1-Base; 2-Inner cylinder; 3-Outer cylinder; 4-Spiral plate; 5-Rubber gasket; 6-Conveying chamber; 7-Threaded sleeve; 8-Input pipe; 9-Output pipe; 10-Conical block; 11-Insertion block; 12-Insertion groove; 13-Base plate; 14-Collection frame; 15-Vortex casing; 16-Connecting hole; 17-Inlet pipe; 18-First pipe; 19-Conveying trough; 20-Second pipe; 21-Output pipe; 22-Metal mesh pipe; 23-Guide 24-Rubber ring; 25-Connecting ring; 26-Threaded rod; 27-Lifting ring; 28-Double-sided gear ring; 29-Sloping panel; 30-First gear; 31-First motor; 32-Second motor; 33-Second gear; 34-Drive shaft; 35-Impeller; 36-Stirring shaft; 37-Third gear; 38-Internal gear ring; 39-Electric telescopic rod; 40-Lifting frame; 41-Spring block; 42-First slot; 43-Second slot. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Please see Figures 1-11 This invention provides a technical solution: a high-efficiency heat exchanger for preventing blockage of high-viscosity waste oil, comprising a base 1, a heat exchange mechanism, and a cleaning mechanism. An inner cylinder 2 is fixedly connected to the base 1, and an outer cylinder 3 is rotatably connected to the base 1. The heat exchange mechanism includes a spiral plate 4 fixedly installed on the outer wall of the inner cylinder 2, the pitch of which changes periodically. A rubber gasket 5 is provided on the inner wall of the outer cylinder 3, and the outer wall of the spiral plate 4 slides against the inner wall of the rubber gasket 5. A conveying chamber 6 for conveying refrigerant is provided inside the spiral plate 4. The heat exchange mechanism can change the flow rate and shear force of the waste oil by conveying it from top to bottom along the spiral plate 4, reducing impurity deposition, and transferring heat with the refrigerant inside the conveying chamber 6 to achieve energy utilization. The cleaning mechanism is installed on the base 1 and is used to drive the outer cylinder 3 to rotate slowly, so that the outer wall of the spiral plate 4 and the rubber gasket 5 slide relative to each other, assisting in scraping away impurities adhering to the inner wall of the rubber gasket 5, reducing the accumulation of impurities, and avoiding blockage.

[0020] Please see Figures 2-11The heat exchange mechanism shown in the figure also includes a threaded sleeve 7 rotatably connected to the outer wall of the top of the outer shell 3. An inlet pipe 8 is provided on the upper side of the outer shell 3. The outer wall of the inlet pipe 8 can be threadedly connected to the inner wall of the threaded sleeve 7. An outlet pipe 9 is fixedly connected to the inlet pipe 8. A conical block 10 is fixedly connected to the bottom end of the outlet pipe 9. A plug-in block 11 is fixedly connected to the bottom of the conical block 10. The top of the inner cylinder 2 has a plug-in groove 12 that can be inserted vertically into the plug-in block 11. The base 1 is provided with a function to assist in the communication and transport of refrigerant and waste oil. The conveying component includes a base plate 13 fixedly installed at the bottom of the outer shell cylinder 3, a collection frame 14 fixedly connected to the base 1, both the base plate 13 and the collection frame 14 are annular, a volute 15 is fixedly connected between the base 1 and the bottom of the inner cylinder 2, the bottom of the inner cylinder 2 is connected to the input end of the volute 15, the bottom end of the conveying chamber 6 is connected to the output end of the volute 15, the upper and lower sides of the base plate 13 are respectively in contact with the surfaces of the volute 15 and the collection frame 14 and rotate, and multiple sets of connecting holes 16 connected to the collection frame 14 are opened on the base plate 13.

[0021] Please see Figures 1-9 The heat exchange mechanism shown in the figure also includes an inlet pipe 17 fixedly installed on the inlet pipe 8 and the conical block 10. The inner cylinder 2 has a first pipe 18 that can be inserted and connected to the bottom end of the inlet pipe 17. The conical block 10 has a conveying groove 19 connected to the bottom end of the outlet pipe 9. The inner cylinder 2 has a second pipe 20 for connecting the upper end of the conveying chamber 6 with the conveying groove 19. The side of the collection frame 14 is connected to the outlet pipe 21. The upper side of the conical block 10 away from the conveying groove 19 is fixedly connected to the slope plate 29 that is fixedly connected to the inner wall of the inlet pipe 8. The inlet pipe 17 is located on the side away from the conveying groove 19. The conveying chamber 6 is located at the upper part of the cross section in the thickness direction of the spiral plate 4.

[0022] Please see Figures 2-11The impurity removal mechanism shown in the diagram includes a metal mesh tube 22 fixedly installed on the outer wall of the rubber liner 5. Multiple guide strips 23 are fixedly connected to the outer wall of the metal mesh tube 22, capable of sliding vertically along the inner wall of the outer casing 3. A rubber ring 24 is fixedly connected to the top end of the metal mesh tube 22, and a connecting ring 25 is fixedly connected to the bottom end. Multiple threaded rods 26 are rotatably connected inside the outer casing 3. A lifting ring 27 is slidably connected to the inner wall of the outer casing 3 along the vertical direction. All threaded rods 26 pass through and are threadedly connected to the lifting ring 27. A driving component is provided on the base 1 to control the rotation of the threaded rods 26 and the outer casing 3. The driving component includes... A double-sided gear ring 28 is rotatably connected to the outer wall of the outer casing 3. The inner and outer walls of the double-sided gear ring 28 are each evenly provided with multiple sets of tooth blocks. The bottom end of the threaded rod 26 is coaxially fixedly connected to a first gear 30 that meshes with the inner wall of the double-sided gear ring 28. A first motor 31 and a second motor 32 are fixedly connected to the base 1. The model of the first motor 31 is preferably Y80M1-2, and the model of the second motor 32 is preferably YYHS-40. The output end of the second motor 32 is coaxially fixedly connected to a second gear 33, which meshes with the outer wall of the double-sided gear ring 28. The outer casing 3 is provided with a control component for controlling the rotation state of the outer casing 3 and the double-sided gear ring 28.

[0023] Please see Figures 2-11 The impurity removal mechanism shown in the figure also includes a drive shaft 34 fixedly installed at the output end of the first motor 31. An impeller 35 is rotatably connected inside the volute 15. The drive shaft 34 passes through the volute 15 and is rotatably connected to the volute 15. The drive shaft 34 passes through the impeller 35 and is coaxially fixedly connected to the impeller 35. The upper end of the drive shaft 34 is driven by a reducer to a stirring shaft 36. The top end of the stirring shaft 36 is rotatably connected to the inner wall of the inner cylinder 2. A third gear 37 is fixedly connected to the outer wall of the drive shaft 34. The bottom of the base plate 13... An internal gear ring 38 is fixedly connected, and a third gear 37 is connected to the internal gear ring 38 via a reducer. The control components include an electric telescopic rod 39 fixedly installed on the outer casing 3. A lifting frame 40 is fixedly connected to the telescopic end of the electric telescopic rod 39. Spring blocks 41 are provided on both the upper and lower sides of the lifting frame 40. A first slot 42 is provided on the base 1, which can be inserted into the lower spring block 41. Multiple sets of second slots 43 are provided on the bottom surface of the double-sided gear ring 28, which can be inserted into the upper spring block 41.

[0024] Working principle: High-temperature waste oil is input through the input pipe 8. After being guided by the slope panel 29, the waste oil flows through the top of the conical block 10 to the spiral plate 4. It is then conveyed downwards along the spiral plate 4 between the inner cylinder 2 and the outer cylinder 3. Because the spiral size of the spiral plate 4 changes periodically, with a large pitch followed by a small pitch, the conveying speed of the waste oil inside also changes. In the expansion section, the flow channel cross-section expands, the flow velocity decreases rapidly, and the solid particles in the fluid tend to migrate towards the center of the flow channel due to inertia, reducing wall deposition. In the contraction section, the flow channel cross-section contracts, the flow velocity increases rapidly, generating strong shearing and scouring effects, effectively stripping away and carrying away soft dirt that may adhere to the wall surface. Finally, the waste oil is transported from the connecting hole 16 on the bottom plate 13 to the collection frame 14 and discharged through the output pipe 21. The refrigerant is input through the inlet pipe 17 and reaches the lower middle section of the inner cylinder 2 through the first pipe 18, avoiding direct absorption of heat from the upper waste oil and affecting the continuous heating efficiency of the refrigerant in the upper part of the conveying chamber 6. The large amount of refrigerant inside the inner cylinder 2 can fully absorb and preheat the refrigerant in the waste oil to be discharged. The first motor 31 drives the drive shaft 34 to rotate. The impeller 35 rotates at high speed, drawing the refrigerant inside the inner cylinder 2 into the volute 15 and accelerating it centrifugally to the bottom of the conveying chamber 6. It is then pressurized and pumped upwards. The refrigerant is conveyed from bottom to top in the conveying chamber 6, absorbing and utilizing the heat in the waste oil. The temperature of the waste oil continuously decreases as it is conveyed from top to bottom, while the temperature of the refrigerant continuously increases as it is conveyed from bottom to top. Furthermore, at the upper end of the conveying chamber 6 and at the position of the conveying trough 19, it can come into contact with the newly input high-temperature waste oil, further increasing the temperature of the output refrigerant. This facilitates the subsequent output and utilization of the refrigerant through the liquid outlet pipe 9. After utilization, the refrigerant temperature decreases and is circulated back to the liquid inlet pipe 17 for further heat absorption.

[0025] When the drive shaft 34 rotates, the reducer drives the stirring shaft 36 to rotate slowly, making the refrigerant mixture inside the inner cylinder 2 more uniform and avoiding the situation where the outer wall temperature is much higher than the internal refrigerant temperature, thus improving the refrigerant's heat absorption efficiency. At the same time, the third gear 37 drives the reducer to make the internal gear ring 38 and the base plate 13 rotate slowly. The base plate 13 drives the outer shell cylinder 3 to rotate, and the outer shell cylinder 3 drives the metal mesh tube 22 and the rubber gasket 5 to rotate slowly, changing the relative position between the rubber gasket 5 and the outer wall of the spiral plate 4. This allows the outer wall of the spiral plate 4 to adhere to the inner wall of the rubber gasket 5 and scrape away the impurities adhering to the inner wall of the rubber gasket 5. Because the waste oil is subjected to centrifugal force during the top-down rotating conveying process... The force causes the impurities in the heavy components to tend to move towards the outer wall and adhere to the rubber liner 5. Therefore, this device can effectively remove these impurities and prevent them from accumulating and causing blockages. When the first motor 31 is running, the second motor 32 stops running. At the same time, it is necessary to ensure that the threaded rod 26 does not rotate to prevent the lifting ring 27 from moving upward. At this time, it is necessary to control the electric telescopic rod 39 to push the lifting frame 40 upward so that the upper spring block 41 can be inserted into the second slot 43, connecting the outer shell cylinder 3 and the double-sided gear ring 28 into a whole. At this time, the slow rotation of the outer shell cylinder 3 will drive the double-sided gear ring 28 to rotate together. If the second motor 32 does not rotate, the second gear 33 will be driven to rotate by the double-sided gear ring 28.

[0026] During disassembly and assembly, the input pipe 8 can be moved upwards by rotating the threaded sleeve 7, thus disconnecting the input pipe 8 from the inner cylinder 2 and the outer cylinder 3. At this time, the first motor 31 stops rotating, controlling the electric telescopic rod 39 to pull back, causing the lifting frame 40 to move downwards. The upper spring latch 41 contacts the second slot 43 for insertion, and the lower spring latch 41 moves downwards to abut against the upper surface of the base 1. The second motor 32 is then activated, driving the second gear 33 to rotate. The second gear 33 drives the double-sided gear ring 28 to rotate, thereby causing the first gear 30 to drive the threaded rod 26 to rotate. If the spring clip 41 is not engaged with the first slot 42 at this time, the outer casing 3 may slowly rotate and the spring clip 41 may be engaged with the first slot 42 in the appropriate position. Then the threaded rod 26 continues to rotate, driving the lifting ring 27 to move upward, pushing the connecting ring 25, the metal mesh tube 22 and the rubber gasket 5 upward together. At the same time, the rubber gasket 5 can be removed and replaced by pulling the upper rubber ring 24 and the metal mesh tube 22 through the mechanical arm, crane and other structures. Conversely, when installing the rubber gasket 5, the connecting ring 25 and the lifting ring 27 should be fixed first. Controlling the second motor 32 to rotate in the reverse direction will cause the lifting ring 27 to move downwards, pulling the metal mesh tube 22 and the rubber gasket 5 downwards. The guide strip 23 will slide along the inner wall of the outer casing 3 until the lifting ring 27 reaches the bottom. The metal mesh tube 22 has a certain degree of flexibility and will not be stretched or deformed, ensuring that the rubber gasket 5 will not be damaged by excessive deformation during installation and removal. Then, the input pipe 8 is installed on top of the outer casing 3, so that the insertion block 11 is inserted into the insertion slot 12. Rotating the threaded sleeve 7 will cause the input pipe 8 to move downwards. The rubber ring 24 completes the seal, the liquid inlet pipe 17 is inserted and connected to the first pipe 18, and the delivery trough 19 is inserted and connected to the second pipe 20, completing the sealing and connection operation. The bottom of the liquid inlet pipe 17 and the delivery trough 19 can be equipped with a plug-in pipe and sealing ring structure to improve the sealing performance of the docking and ensure the stable delivery of refrigerant. The design of the spring block 41 ensures that if it fails to be directly inserted into the first slot 42 or the second slot 43 when switching the connection state, it will not get stuck. Moreover, it can be springed into the appropriate position for insertion and fixation during subsequent rotation.

[0027] It is worth noting that in order to reduce the wear of the spiral plate 4 on the rubber gasket 5, the outer edge of the spiral plate 4 is rounded and polished, with no sharp edges. The rubber gasket 5 is made of wear-resistant fluororubber. The rotation speed of the outer shell cylinder 3 is controlled to be very low, which will slow down the wear much. This ensures the sealing between the spiral plate 4 and the rubber gasket 5 while reducing wear.

[0028] Meanwhile, although the variable pitch structure creates a local low-velocity zone in the larger pitch area, and the waste mineral oil mainly flows along the upper surface of the spiral plate 4, under the combined action of strong shear disturbance generated by the rotating flow, gravity flow, and periodic variable speed scouring, impurities cannot be deposited and adhered on the upper surface of the spiral plate 4, and the wall surface can be kept clean for a long time. The device has a large flow rate, high shear force, and no stagnant zone, which can effectively achieve the anti-clogging function. At the same time, with the slow rotation of the outer shell cylinder 3, continuous self-cleaning of impurities on the inner wall is achieved. The bottom end of the spiral plate 4 can be attached to the top surface of the bottom plate 13, so that during the rotation of the bottom plate 13, the spiral plate 4 can assist in scraping off the impurities accumulated on the bottom plate 13 and pushing them to the connecting hole 16 for output. The collection frame 14 has a large space, and the possibility of impurity accumulation is small. Impurity filtration or cleaning structures can also be set up for regular cleaning. Some parts of the equipment that need to be connected and sealed are equipped with corresponding sealing structures to prevent cross-mixing and overflow of fluids.

[0029] 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 process, method, article, or apparatus.

[0030] Although embodiments of the 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 invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-efficiency heat exchanger for preventing clogging by high-viscosity waste oil, characterized in that, include: A base (1) is fixedly connected to an inner cylinder (2), and an outer cylinder (3) is rotatably connected to the base (1). Also includes: The heat exchange mechanism includes a spiral plate (4) fixedly installed on the outer wall of the inner cylinder (2). The pitch of the spiral plate (4) changes periodically. The inner wall of the outer cylinder (3) is provided with a rubber gasket (5). The outer wall of the spiral plate (4) slides against the inner wall of the rubber gasket (5). The spiral plate (4) has a conveying chamber (6) for conveying refrigerant. The heat exchange mechanism can convey waste oil from top to bottom along the spiral plate (4). The impurity removal mechanism is installed on the base (1) and is used to drive the outer shell cylinder (3) to rotate slowly, so that the outer wall of the spiral plate (4) and the rubber pad (5) slide relative to each other, and assist in scraping off the impurities adhering to the inner wall of the rubber pad (5).

2. The high-efficiency heat exchanger for preventing blockage of high-viscosity waste oil according to claim 1, characterized in that: The heat exchange mechanism also includes a threaded sleeve (7) rotatably connected to the outer wall of the top of the outer shell (3). An input pipe (8) is provided on the upper side of the outer shell (3). The outer wall of the input pipe (8) can be threadedly connected to the inner wall of the threaded sleeve (7). An outlet pipe (9) is fixedly connected to the input pipe (8). A conical block (10) is fixedly connected to the bottom end of the outlet pipe (9). An insertion block (11) is fixedly connected to the bottom of the conical block (10). An insertion groove (12) is provided at the top of the inner cylinder (2) so that it can be inserted into the insertion block (11) in the vertical direction. A conveying component for assisting in the conveying and communication of refrigerant and waste oil is provided on the base (1).

3. The high-efficiency heat exchanger for preventing blockage of high-viscosity waste oil according to claim 2, characterized in that: The conveying component includes a base plate (13) fixedly installed at the bottom of the outer shell cylinder (3), a collection frame (14) fixedly connected to the base (1), the base plate (13) and the collection frame (14) are both annular, a volute (15) is fixedly connected between the base (1) and the bottom of the inner cylinder (2), the bottom of the inner cylinder (2) is connected to the input end of the volute (15), the bottom end of the conveying cavity (6) is connected to the output end of the volute (15), the upper and lower sides of the base plate (13) are respectively in contact with the surfaces of the volute (15) and the collection frame (14) and rotate, and multiple sets of connecting holes (16) connected to the collection frame (14) are opened on the base plate (13).

4. A high-efficiency heat exchanger for preventing blockage of high-viscosity waste oil according to claim 3, characterized in that: The heat exchange mechanism also includes an inlet pipe (17) fixedly installed on the inlet pipe (8) and the conical block (10). The inner cylinder (2) is provided with a first pipe (18) that can be inserted and connected to the bottom end of the inlet pipe (17). The conical block (10) is provided with a conveying groove (19) that is connected to the bottom end of the outlet pipe (9). The inner cylinder (2) is provided with a second pipe (20) for connecting the upper end of the conveying chamber (6) with the conveying groove (19). The side of the collection frame (14) is connected to an outlet pipe (21).

5. A high-efficiency heat exchanger for preventing blockage of high-viscosity waste oil according to claim 4, characterized in that: The impurity removal mechanism includes a metal mesh tube (22) fixedly installed on the outer wall of the rubber liner (5). The outer wall of the metal mesh tube (22) is fixedly connected to multiple sets of guide strips (23) that can slide and guide the inner wall of the outer shell cylinder (3) in the vertical direction. A rubber ring (24) is fixedly connected to the top end of the metal mesh tube (22), and a connecting ring (25) is fixedly connected to the bottom end of the metal mesh tube (22). Multiple sets of threaded rods (26) are rotatably connected inside the outer shell cylinder (3). A lifting ring (27) is slidably connected to the inner wall of the outer shell cylinder (3) in the vertical direction. Multiple sets of threaded rods (26) pass through the lifting ring (27) and are threadedly connected to the lifting ring (27). The base (1) is provided with a drive component for controlling the rotation state of the threaded rods (26) and the outer shell cylinder (3).

6. A high-efficiency heat exchanger for preventing blockage of high-viscosity waste oil according to claim 5, characterized in that: The driving component includes a double-sided gear ring (28) rotatably connected to the outer wall of the outer shell cylinder (3). The inner and outer walls of the double-sided gear ring (28) are each uniformly provided with multiple sets of tooth blocks. The bottom end of the threaded rod (26) is coaxially fixedly connected to a first gear (30) that meshes with the inner wall of the double-sided gear ring (28). A first motor (31) and a second motor (32) are fixedly connected to the base (1). The output end of the second motor (32) is coaxially fixedly connected to a second gear (33). The second gear (33) meshes with the outer wall of the double-sided gear ring (28). The outer shell cylinder (3) is provided with a control component for controlling the rotation state of the outer shell cylinder (3) and the double-sided gear ring (28).

7. A high-efficiency heat exchanger for preventing blockage of high-viscosity waste oil according to claim 6, characterized in that: The impurity removal mechanism also includes a drive shaft (34) fixedly installed at the output end of the first motor (31). An impeller (35) is rotatably connected inside the volute (15). The drive shaft (34) passes through the volute (15) and is rotatably connected to the volute (15). The drive shaft (34) passes through the impeller (35) and is coaxially fixedly connected to the impeller (35). The upper end of the drive shaft (34) is driven by a stirring shaft (36) through a reducer. The top end of the stirring shaft (36) is rotatably connected to the inner wall of the inner cylinder (2). A third gear (37) is fixedly connected to the outer wall of the drive shaft (34). An internal gear ring (38) is fixedly connected to the bottom of the base plate (13). The third gear (37) is driven by the internal gear ring (38) through a reducer.

8. A high-efficiency heat exchanger for preventing blockage of high-viscosity waste oil according to claim 6, characterized in that: The control component includes an electric telescopic rod (39) fixedly installed on the outer shell (3). The telescopic end of the electric telescopic rod (39) is fixedly connected to a lifting frame (40). The upper and lower sides of the lifting frame (40) are respectively provided with spring clips (41). The base (1) is provided with a first slot (42) that can be inserted into the lower spring clip (41). The bottom surface of the double-sided toothed ring (28) is provided with multiple sets of second slots (43) that can be inserted into the upper spring clip (41).

9. A high-efficiency heat exchanger for preventing blockage of high-viscosity waste oil according to claim 4, characterized in that: The conical block (10) is fixedly connected to a slope panel (29) that is fixedly connected to the inner wall of the input pipe (8) on the side away from the conveying trough (19), and the liquid inlet pipe (17) is located on the side away from the conveying trough (19).

10. A high-efficiency heat exchanger for preventing blockage of high-viscosity waste oil according to claim 1, characterized in that: The conveying cavity (6) is located at the upper part of the cross section in the thickness direction of the spiral plate (4).

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