Anti-fouling evaporative heat exchange device

Abstract

The present application relates to heat exchange technical field, specifically to a kind of anti-fouling evaporation heat exchange device, including shell, be equipped with spray assembly and heat exchange tube bundle in shell, water collecting hopper is equipped between spray assembly and heat exchange tube bundle in shell, water collecting hopper is arranged along the width direction of heat exchange tube bundle, one end of water collecting hopper is hinged in shell inner wall, other end is equipped with protruding block, protruding block connects the one end of second elastic member, the other end of second elastic member connects shell inner wall, spray assembly is equipped with the oblique spray head spraying towards water collecting hopper at the one end of protruding block.The present application is driven by the water collecting hopper water storage self-weight pitching swing first disturbance ring, second disturbance ring reciprocating sliding, first disturbance ring, second disturbance raindrop-shaped rib can extend into tube bundle gap, break tube and tube bundle lower half circular arc static liquid film stagnation zone and generate turbulence, prevent local concentration of water body, inhibit scale precipitation accumulation, realize long-term anti-fouling of tube bundle.

Description

Technical Field

[0001] This invention relates to the field of heat exchange technology, and more specifically to an anti-scaling evaporative heat exchange device. Background Technology

[0002] Evaporative heat exchangers rely on the evaporation of a water film sprayed on the outer wall of the tube bundle to achieve medium cooling, and are widely used in industrial circulating cooling. CN112944954B discloses an anti-scaling scheme for evaporative heat exchangers, which reduces the temperature difference between the inside and outside of the heat exchange coil by regulating the airflow and the spray system, and slows down scale formation by inhibiting the evaporation of the water film on the tube wall. However, the heat exchange core of the evaporative heat exchanger relies on the evaporation of the water film to achieve heat transfer. This scheme makes the heat exchange capacity and the anti-scaling effect mutually restrictive. If the anti-scaling effect is pursued by forcibly inhibiting the evaporation of the water film, it will directly reduce the overall cooling efficiency of the machine, making it difficult to simultaneously meet the requirements of heat exchange performance and anti-scaling operation.

[0003] In addition, conventional evaporative heat exchangers generally use smooth heat exchange tube bundles. Under gravity-fed operation, liquid film stagnation zones easily form on the lower semi-circular surface of the tube bundle and in the shielded areas between adjacent tube bundles. Water in these stagnation zones has poor flow, leading to continuous evaporation and concentration. Calcium and magnesium salts in the water tend to become supersaturated, subsequently crystallizing and accumulating on the tube wall surface to form scale. Currently, conventional scale prevention methods in the industry mainly include chemical scale inhibition, regular high-pressure water washing, and external mechanical scale removal. Among these, chemical scale inhibition can only slightly reduce the scaling tendency of the water and is insufficient to solve the problem of water flow stagnation between tube bundles. Localized scaling and concentrating still exist. High-pressure water washing is a passive post-maintenance method that can only remove formed scale and cannot break the static stagnant water film in real time. Moreover, the flushing effect is poor in the narrow gaps of the tube bundle, and the scale recurrence is fast. Traditional mechanical descaling structures mostly rely on external power, which is complex in structure, has high operating energy consumption, and is difficult to adapt to the narrow gaps of the tube bundle for full-area disturbance, resulting in a large number of disturbance blind spots. Therefore, all existing scale prevention methods are difficult to continuously and effectively solve the problem of liquid film stagnation between tubes. After long-term operation, localized scaling of the tube bundle becomes severe, blocking the gas-liquid flow channel and causing the heat exchange efficiency of the heat exchange device to continuously decline. Summary of the Invention

[0004] To achieve the above objectives, the present invention provides the following technical solution: This invention provides an anti-scaling evaporative heat exchange device, comprising a shell, within which a spray assembly and a heat exchange tube bundle are disposed. A water inlet is disposed between the spray assembly and the heat exchange tube bundle within the shell, the water inlet being arranged along the width direction of the heat exchange tube bundle. One end of the water inlet is hinged to the inner wall of the shell, and the other end is fitted with a protrusion. The protrusion is connected to one end of a second elastic element, and the other end of the second elastic element is connected to the inner wall of the shell. The spray assembly is provided with an inclined nozzle spraying towards the water inlet at the protrusion end. A first disturbance ring and a second disturbance ring are slidably sleeved on the heat exchange tube bundle, arranged vertically. The first disturbance ring and the second disturbance ring are fixedly connected by a connecting support plate. Both the first and second disturbance rings are provided with several ribs. A push-pull plate is fixed above the first disturbance ring, and the push-pull plate is hinged to one end of a second swing arm, the other end of which is hinged to the protrusion.

[0005] Furthermore, the water-drawing hopper is shaped like a shallow scoop, and the end of the water-drawing hopper connected to the second elastic element is a free end. The free end has an overflow port, and a brim is provided above the overflow port.

[0006] Furthermore, rotating rods are rotatably installed on both sides of the water intake bucket, and guide plates are fixedly connected to the rotating rods. Under normal conditions, the guide plates on both sides are retracted to the lower side of the water intake bucket and form a V-shaped airflow guiding structure.

[0007] Furthermore, a guide groove is provided on the outer wall of the free end of the water diversion bucket, and a vertically arranged slide plate is slidably assembled in the guide groove. The bottom sides of the slide plate are respectively hinged to the first swing arm, and the other end of the first swing arm is hinged to the connecting rod. The other end of the connecting rod is hinged to the end of the rotating rod. A first elastic element is provided inside the guide groove. The lower end of the first elastic element is connected to the upper side of the protrusion at the bottom of the slide plate, and the upper end of the first elastic element is connected to the inner wall of the upper end of the guide groove.

[0008] Furthermore, a bearing roller is rotatably mounted on the upper end of the slide plate, and a wedge plate is fixed to the inner wall of the outer shell by a bracket. The bearing roller can abut against the wedge surface of the wedge plate. When the free end of the water bucket rotates inward, the bearing roller presses against the wedge surface of the wedge plate, and the slide plate is driven to slide downward along the guide groove by the squeezing force.

[0009] Furthermore, when the slide plate slides downwards, it drives the first swing arm to rotate. The first swing arm pulls the connecting rod to move, and the connecting rod drives the rotating rod and the guide plate to rotate outwards synchronously. After the guide plate unfolds outwards, the airflow rising from below the outer shell can contact the bottom of the water bucket over a large area, assisting the water bucket to be lifted and reset.

[0010] Furthermore, the inner wall of the outer shell near the free end of the water inlet bucket is provided with an inwardly extending limiting block, which is used to limit the maximum stroke of the free end of the water inlet bucket rotating inward.

[0011] Furthermore, the first disturbance ring and the second disturbance ring are arranged with a heat exchange tube bundle pipe spaced apart. The ribs of the first disturbance ring are located on the inner and outer sides of the lower semicircle of the first disturbance ring, and the ribs of the second disturbance ring are located on the inner and outer sides of the lower semicircle and the outer side of the upper semicircle of the second disturbance ring.

[0012] Furthermore, multiple sets of the first disturbance ring and the second disturbance ring are provided according to the size of the heat exchange tube bundle. The first disturbance ring and the second disturbance ring of adjacent sets are fixedly connected by a long rod. A guide sleeve is fixedly installed on the inner wall of one side of the shell. A guide rod is slidably inserted in the guide sleeve. One end of the guide rod is fixedly connected to the outermost connecting support plate.

[0013] Furthermore, a fan is installed on the top of the outer casing, air inlet louvers are provided on the wall of the outer casing below the heat exchange tube bundle, and a water collection tank is provided at the bottom of the outer casing. The spray assembly is supplied with water by a spray pump drawing water from the water collection tank. Beneficial effects

[0014] 1. This invention relies on the self-weight of the water hopper to swing back and forth, driving the disturbance ring to reciprocate without external power. It has excellent automatic anti-scaling performance. When the equipment is running, the tilting nozzle continuously stores water into the free end of the water hopper. The water hopper is driven to swing back and forth by gravity. The first disturbance ring and the second disturbance ring are driven to slide smoothly back and forth along the heat exchange tube bundle through the protrusion and the second swing arm. The raindrop-shaped ridges on the surface of the first disturbance ring and the second disturbance ring maintain a safe distance from the tube wall and can extend into the narrow gap area of ​​the adjacent tube bundle. This continuously disturbs the water film on the outside of the tube wall, breaks the static liquid film stagnation area in the lower semi-circular arc of the tube bundle and the shielding area between the tubes, and forms local turbulence. This avoids local evaporation and concentration of water, effectively interferes with the adhesion, crystallization and accumulation of scale particles, and inhibits scale formation in the tube bundle.

[0015] 2. This invention utilizes an adaptive expansion guide plate combined with an airflow-assisted reset structure to effectively improve equipment operational stability and long-term anti-scaling reliability. Under normal conditions, the guide plate retracts to form a V-shaped structure, diverting the upward airflow and preventing airflow interference with the water hopper's water storage swing. This ensures precise and controllable reciprocating sliding movement of the disturbance unit. During the water hopper's load-bearing deflection process, the guide plate is driven to unfold outward through a transmission mechanism, exposing the bottom of the water hopper. Utilizing the equipment's inherent upward airflow field, a uniform airflow lifting force is formed. After the water hopper drains and reduces its weight, the airflow lifting, combined with the second elastic element, achieves smooth reset, buffering the instantaneous rebound impact of the elastic element and preventing problems such as slippage and jamming of the disturbance unit and inadequate disturbance in the inter-pipe area. At the same time, it reduces fatigue wear of various transmission and elastic components, extends the service life of the mechanism, ensures continuous breaking of the inter-pipe liquid film stagnation zone, and maintains the device's heat exchange efficiency stably for a long period. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a three-dimensional schematic diagram of the overall structure of the present invention; Figure 2 This is a cross-sectional view of the overall structure of the present invention; Figure 3 This is a schematic diagram of the assembly state of the disturbance unit of the present invention; Figure 4 This is a schematic diagram of the water diversion bucket structure of the present invention; Figure 5 For the present invention Figure 4 Enlarged schematic diagram of the structure at point A; Figure 6 This is a side view of the water diversion bucket of the present invention; Figure 7 This is a schematic diagram of the deflector plate of the present invention in its retracted state; Figure 8 This is a schematic diagram of the deflector plate of the present invention in its deployed state; Figure 9 This is a schematic diagram of the first elastic element structure of the present invention; Figure 10 This is a schematic diagram of the first disturbance ring structure of the present invention.

[0018] Figure label: 10. Outer shell; 11. Spray assembly; 12. Heat exchange tube bundle; 13. Air inlet louvers; 14. Water collection tank; 15. Spray pump; 16. Fan; 17. Limit block; 20. Water inlet hopper; 201. Guide plate; 202. Guide groove; 203. Slide plate; 204. Bearing roller; 205. Connecting rod; 206. First swing arm; 207. First elastic element; 21. Protrusion; 22. Overflow outlet; 23. Cap brim; 24. Second elastic element; 25. Second swing arm; 26. Push-pull plate; 30. First disturbance ring; 31. Connecting support plate; 32. Second disturbance ring; 33. Rib; 34. Long rod; 35. Guide sleeve; 36. Guide rod; 40. Wedge plate. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0020] The present invention will be further described below with reference to embodiments.

[0021] See attached document Figure 1-2 A scale-resistant evaporative heat exchange device includes a housing 10, a spray assembly 11 and a heat exchange tube bundle 12 disposed inside the housing 10, a fan 16 installed on the top of the housing 10, an air inlet louver 13 disposed on the housing wall below the heat exchange tube bundle 12, and a water collection tank 14 disposed at the bottom of the housing 10. The spray assembly 11 and the spray pump 15 are connected by a pipeline. The spray pump 15 continuously draws water collected in the water collection tank 14 and supplies it to the spray assembly 11 to achieve water circulation spraying operation. When the fan 16 operates, it drives external air to enter the interior of the housing 10 through the air inlet louver 13. The airflow passes through the heat exchange tube bundle 12 from bottom to top and fully contacts the water film on the outer side of the tube wall. The water film evaporates and absorbs heat, thereby cooling the medium inside the heat exchange tube bundle 12.

[0022] See Figure 2 and Figure 3 Inside the outer shell 10, between the spray assembly 11 and the heat exchange tube bundle 12, a water-guiding bucket 20 is arranged. The water-guiding bucket 20 is arranged laterally along the width direction of the heat exchange tube bundle 12. One end of the water-guiding bucket 20 is hinged to the inner wall of one side of the outer shell 10, and the other end of the water-guiding bucket 20 is a free end. A protrusion 21 is fixedly installed on the free end. The protrusion 21 is connected to one end of the second elastic member 24, and the other end of the second elastic member 24 is connected to the inner wall of the other side of the outer shell 10.

[0023] The second elastic element 24 has two optional implementation forms, which can be flexibly selected according to the working conditions. The first is to use a tension spring, with both ends of the tension spring being hooked onto the lug structure preset on the protrusion 21 and the inner wall of the outer shell 10, respectively. The second is to use an elastic telescopic rod, with both ends of the elastic telescopic rod being hinged to the protrusion 21 and the inner wall of the outer shell 10, respectively.

[0024] The spray assembly 11 is equipped with multiple sets of nozzles. Most of the nozzles spray circulating water onto the surface of the heat exchange tube bundle 12 to achieve conventional spray cooling of the heat exchange tube bundle 12. The spray assembly 11 is also separately equipped with several inclined nozzles. The inclined nozzles spray water continuously onto the top surface of the free end of the water bucket 20 with the mounting protrusion 21. The water flow continuously gathers at the free end of the water bucket 20, and the load on the free end continuously increases, causing the water bucket 20 to pitch and rotate inward around the hinge fulcrum. When the water inside the water bucket 20 is discharged outward and the weight is reduced, the second elastic element 24 provides tension, driving the free end of the water bucket 20 to lift and reset, thereby realizing the reciprocating pitching motion of the free end of the water bucket 20.

[0025] See Figure 4 and Figure 5 The water hopper 20 is integrally formed in the shape of a shallow scoop, with an inclined slope facing the free end inside the hopper. This structural design has advantages in adaptability to different working conditions. Compared with conventional flat or deep-groove structures, the large open curved surface of the shallow scoop can significantly increase the receiving area of ​​the spray water, stably receiving the spray water from the inclined nozzles, effectively reducing water splashing and loss, and ensuring that the water is efficiently collected inside the hopper. On the other hand, the inclined slope inside the hopper can guide the collected water flow, autonomously guiding the received spray water to flow quickly and centrally to the free end of the water hopper 20, so that the free end can accumulate water stably and quickly, accurately increasing the gravity load at the free end. At the same time, the gentle curved surface of the shallow scoop distributes the force evenly, and after water is stored, a stable gravitational torque can be formed, preventing skewed force or deflection due to local water accumulation and uneven load, ensuring smooth subsequent pitching and rotation of the water hopper 20.

[0026] The end of the water hopper 20 connected to the second elastic member 24 is a free end. An overflow port 22 is provided on the side wall of the free end. A brim 23 is integrally formed above the overflow port 22. The brim 23 can effectively prevent water from splashing upwards and scattering during the drainage process of the overflow port 22.

[0027] During operation, the tilting nozzle continuously injects water into the water hopper 20. As the water gradually accumulates, the weight of the free end of the water hopper 20 increases continuously. Under the action of gravitational torque, the free end of the water hopper 20 rotates inward, completing the angle deflection action. When the water volume in the hopper exceeds the preset volume, the excess water can be automatically discharged outward through the overflow port 22 opened on the side wall. On the one hand, this can limit the maximum water weight of the water hopper 20, avoid overloading of the hopper body due to excessive water accumulation, excessive rotational torque leading to loss of control, and prevent problems such as overload jamming and deformation damage of the transmission structure. On the other hand, as the overflow port 22 continuously drains water, the water weight inside the water hopper 20 gradually decreases, and the downward torque generated by the weight of the hopper body continuously decreases, providing the necessary mechanical conditions for the subsequent reset action of the water hopper 20. With the elastic tension of the second elastic element 24, the free end of the water hopper 20 can be smoothly driven to lift and reset.

[0028] See Figure 2 The inner wall of the outer shell 10 near the free end of the water hopper 20 is provided with an inwardly extending limiting block 17. The limiting block 17 can block the free end of the water hopper 20, limit the maximum angle of inward rotation of the water hopper 20, limit the rotation stroke of the water hopper 20, and prevent the subsequent transmission components from exceeding the rotation angle limit and getting stuck.

[0029] See Figure 4 The heat exchange tube bundle 12 is slidably fitted with a first disturbance ring 30 and a second disturbance ring 32 arranged vertically. The first disturbance ring 30 and the second disturbance ring 32 are fixedly connected by a connecting support plate 31 to form an integrated disturbance unit. The first disturbance ring 30 and the second disturbance ring 32 are set apart by one heat exchange tube bundle 12 pipe, and the interval between the two is arranged directly opposite the pipe gap of the adjacent heat exchange tube bundle 12. It can be specifically extended into the narrow gap of the tube bundle and the shielded area between the tubes that are difficult to reach by conventional structures. It can specifically break the dead water and stagnant water film between the tubes that are difficult to deal with by traditional anti-scaling methods. It can simultaneously disturb the water film in the upper and lower areas of the heat exchange tube bundle 12, continuously destroy the static water film boundary layer, effectively inhibit scale adhesion and crystallization, and stabilize the anti-scaling and heat exchange effect of the equipment.

[0030] This disturbance unit has good versatility and expandability. It can be flexibly adapted and installed according to the actual number and longitudinal length of the heat exchange tube bundle 12. For heat exchange tube bundles 12 with a large number of tubes and a long longitudinal length, a second disturbance ring 32 and a corresponding disturbance structure can be added downwards to effectively adapt to the arrangement conditions of heat exchange tube bundles 12 of different sizes and specifications. At the same time, multiple sets can be arranged according to the overall width of the heat exchange tube bundle 12. Adjacent sets of disturbance units are fixedly connected to each other by long rods 34 to form an integral structure, so that each set of disturbance units can move back and forth synchronously, realize synchronous disturbance operation of the entire heat exchange tube bundle 12, eliminate disturbance blind spots in areas prone to scaling and water stagnation such as tube bundle gaps and lower semi-circular arcs of the tube bundle, and ensure uniform and stable overall anti-scaling effect.

[0031] See Figure 10 The first disturbance ring 30 and the second disturbance ring 32 are both integrally formed with several ribs 33. All ribs 33 adopt a raindrop-shaped structure design, and the tips of the raindrops are uniformly facing the moving direction of the disturbance ring. The ribs 33 always maintain a fixed safe distance from the tube wall of the heat exchange tube bundle 12, and do not contact or scrape the outer wall of the tube throughout the process. In terms of structural arrangement, the raindrop-shaped ribs 33 of the first disturbance ring 30 are arranged on the inner and outer sides of its lower semicircle, and the raindrop-shaped ribs 33 of the second disturbance ring 32 are arranged on the inner and outer sides of its lower semicircle and the outer side of its upper semicircle. The differentiated arrangement can cover the main heat exchange area of ​​the heat exchange tube bundle 12 in all directions, accurately cover the stagnant water area of ​​the lower semicircle of the tube bundle and the stagnant water area between the tubes, and there are no disturbance dead corners.

[0032] When the disturbance unit moves back and forth along the surface of the heat exchange tube bundle 12, the raindrop-shaped ribs 33 that move synchronously with the ring will continuously push the surrounding spray water to undergo flow deformation, breaking the originally static and uniformly attached water film boundary layer on the outside of the tube wall, changing the original stable flow state of the water, causing the water around the tube wall to continuously generate disordered local turbulence, continuously destroying the liquid film stagnation zone in the tube bundle gap and the lower semi-circular arc of the tube body, avoiding the long-term static water and evaporation concentration leading to the supersaturation precipitation of calcium and magnesium ions. This turbulent state can continuously interfere with the adhesion, accumulation and crystal formation of scale grains on the tube wall surface, inhibiting scale formation on the outer wall of the heat exchange tube bundle 12.

[0033] Meanwhile, the raindrop-shaped streamline profile can minimize the water resistance of the ribs 33 moving in the water, significantly reduce the force required to drive the reciprocating motion of the disturbance unit, and reduce the operating load of the equipment. In addition, the dense turbulence formed by the stirring of the ribs 33 can accelerate the renewal and replacement of the water film on the pipe wall, increase the mixing degree and contact area of ​​the air and water, and effectively enhance the evaporation heat exchange efficiency of the water film. While solving the problem of water stagnation and scaling between pipes, this device ensures normal evaporation heat exchange of the water film, taking into account both anti-scaling performance and heat exchange efficiency, and ultimately achieving the dual effect of anti-scaling of the tube bundle and improving the overall heat exchange performance of the equipment.

[0034] See Figure 4 A guide sleeve 35 is fixedly installed on the inner wall of one side of the outer shell 10. A guide rod 36 slides through the guide sleeve 35. One end of the guide rod 36 is fixedly connected to the outermost connecting support plate 31. The guide rod 36 and the guide sleeve 35 cooperate with each other to guide and constrain the reciprocating movement of all disturbance units. At the same time, the reciprocating movement of the disturbance unit is limited by the maximum swing angle of the water diversion bucket 20. The effective sliding length of the guide rod 36 is matched and designed so that when the disturbance unit moves to the extreme positions on both sides, the guide rod 36 still has enough length to be inserted inside the guide sleeve 35 and the guide rod 36 will not come out of the guide sleeve 35.

[0035] To enable the disturbance unit to move horizontally, a push-pull plate 26 is fixedly installed above the first disturbance ring 30. One side of the push-pull plate 26 is hinged to one end of the second swing arm 25, and the other end of the second swing arm 25 is hinged to the protrusion 21. When the free end of the water hopper 20 reciprocates inward and outward, the protrusion 21 swings synchronously with the free end. The protrusion 21 drives the second swing arm 25 to swing back and forth. The second swing arm 25 drives the push-pull plate 26 to move back and forth. The push-pull plate 26 drives all the first disturbance rings 30 and the second disturbance rings 32 to slide back and forth continuously along the heat exchange tube bundle 12. The unpowered autonomous reciprocating disturbance replaces the traditional external power disturbance structure, avoiding the disadvantages of the traditional mechanical descaling structure being complex, energy-intensive, and having inadequate gap disturbance. The raindrop-shaped ribs 33 continuously disturb the water film on the tube wall surface, continuously suppressing the deposition of scale on the outer wall of the heat exchange tube bundle 12.

[0036] See Figure 7Rotary rods are mounted on both sides of the water hopper 20, and guide plates 201 are fixedly connected to the rods. Under normal working conditions without external force, the guide plates 201 on both sides are closed and attached to the lower side of the water hopper 20. The two guide plates 201 cooperate with each other to form a V-shaped airflow guiding structure. When the guide plates 201 are in the closed state, the rising airflow from the lower part of the outer shell 10 is guided by the V-shaped structure and the airflow is diverted to both sides of the water hopper 20, reducing the direct upward impact of the airflow on the bottom of the water hopper 20 and reducing the interference of the airflow on the pitching movement of the water hopper 20.

[0037] See Figure 9 The water hopper 20 has a vertically extending guide groove 202 on the outer wall of its free end. A slide plate 203 is installed in the guide groove 202. A protruding structure is provided at the lower end of the slide plate 203. The slide plate 203 is used to achieve sliding positioning by cooperating with the guide groove 202. A gap is reserved between the vertical main body section of the slide plate 203 and the groove wall of the guide groove 202. The left and right sides of the bottom of the slide plate 203 are respectively hinged to the first swing arm 206. The end of the first swing arm 206 away from the slide plate 203 is hinged to the connecting rod 205. The other end of the connecting rod 205 is hinged to the end of the rotating rod.

[0038] A first elastic element 207 is installed inside the guide groove 202. The first elastic element 207 is preferably a compression spring or a tension spring. The lower end of the first elastic element 207 is connected to the upper side of the bottom protrusion structure of the slide plate 203, and the upper end of the first elastic element 207 is connected to the upper inner wall of the guide groove 202. The first elastic element 207 continuously applies an upward elastic force to the slide plate 203, and under normal conditions, it keeps the slide plate 203 at the upper limit position.

[0039] See Figure 6 and Figure 9 The upper end of the slide plate 203 is rotatably mounted with a bearing roller 204. The inner wall of the outer shell 10 is fitted with a wedge plate 40 with the help of a fixed bracket. The outer ring of the bearing roller 204 can fit and abut against the wedge-shaped inclined surface of the wedge plate 40. The bearing roller 204 can rotate independently, transforming the traditional sliding friction between surfaces into rolling friction, greatly reducing motion resistance, reducing wear on the contact surface, and ensuring smooth transmission over a long period of time. The angle between the inclined surface of the wedge plate 40 and the vertical direction is set to 35°. If the inclination angle is too small, mechanical self-locking is likely to occur, causing the mechanism to be unable to return to its original position. 35° is far from the critical angle of self-locking, which can avoid the risk of self-locking jamming.

[0040] As the free end of the water bucket 20 rotates inward, the sliding plate 203 and the bearing roller 204 follow the water bucket 20 in a synchronous arc motion. The bearing roller 204 gradually presses against the inclined surface of the wedge plate 40. The thrust generated by the continuous inward rotation of the water bucket 20 is transmitted to the bearing roller 204. The wedge inclined surface generates an oblique reaction force on the bearing roller 204. This force is decomposed into a vertically downward component, which drives the sliding plate 203 to overcome the elastic force of the first elastic element 207 and slide down along the guide groove 202. When the water bucket 20 rotates inward to the maximum stroke position defined by the limit block 17, the bearing roller 204 is still in the effective contact range of the wedge inclined surface and has not rolled to the bottom inflection point of the inclined surface. The movement stroke is reserved with sufficient safety margin to prevent the transmission components from dislodging or the action from failing.

[0041] See Figure 8 During the process of the slide plate 203 sliding down steadily along the guide groove 202, the first swing arms 206 on both sides can be driven to swing at an angle. The downward-moving first swing arms 206 exert a pulling displacement on the connecting rod 205, causing the connecting rod 205 to deflect in position, thereby driving the rotating rod to rotate synchronously in the circumferential direction. Finally, the rotating rod drives the guide plates 201 on both sides to flip outward synchronously and unfold.

[0042] The V-shaped shielding structure formed by the normal retraction is opened, exposing a large area of ​​the bottom of the water hopper 20. The airflow from bottom to top inside the outer shell 10 can contact the bottom wall of the water hopper 20 directly and smoothly over a large area. It makes full use of the upward airflow field of the evaporative heat exchanger to form a continuous and uniform upward lifting force on the bottom of the water hopper 20. As the water stored inside the water hopper 20 gradually overflows and is emptied through the overflow port 22, the downward gravity load formed by the water storage at the free end of the water hopper 20 gradually disappears. At this time, the lifting force of the bottom airflow can offset the off-center load of the bucket body in advance and smoothly. Together with the elastic pull force of the second elastic element 24, it drives the free end of the water hopper 20 to rise and reset, completing a complete pitching operation cycle.

[0043] The aforementioned airflow lifting effect is evenly applied to the entire bottom area of ​​the water inlet bucket 20, which can effectively buffer the instantaneous rebound tension of the second elastic element 24, avoid the impact vibration, abnormal noise and structural fatigue caused by the rapid rebound of the bucket body, and greatly improve the overall operational stability. In addition, the airflow-assisted reset can effectively reduce the load on the second elastic element 24, reduce the deformation and fatigue wear of the second elastic element 24 due to long-term reciprocating tension, extend the service life of the elastic element, reduce the frequency of equipment maintenance, and the airflow lifting can assist the water inlet bucket 20 to rise smoothly and slowly, avoiding the instantaneous impact wear of precision transmission components such as bearing roller 204, wedge plate 40, first swing arm 206, and connecting rod 205 caused by rigid rebound, ensuring that the entire set of mechanical actions is smooth and without jamming for a long time, ensuring the long-term stable and precise operation of the disturbance unit, continuously eliminating the hidden danger of water stagnation and scaling between pipes, and avoiding the problem of local long-term stagnant water and scaling caused by transmission jamming.

[0044] All hinge positions in this device use pin-shaft hinge structures made of wear-resistant alloy steel, and wear-resistant bushings are added to the hinge mating surfaces to reduce wear during reciprocating rotation. Under long-term operation, the hinge gap can still be kept stable to avoid rotation jamming.

[0045] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A scale-resistant evaporative heat exchange device, comprising a housing (10), wherein a spray assembly (11) and a heat exchange tube bundle (12) are disposed within the housing (10), characterized in that, A water inlet (20) is provided inside the outer shell (10) between the spray assembly (11) and the heat exchange tube bundle (12). The water inlet (20) is arranged along the width direction of the heat exchange tube bundle (12). One end of the water inlet (20) is hinged to the inner wall of the outer shell (10), and the other end is equipped with a protrusion (21). The protrusion (21) is connected to one end of the second elastic member (24), and the other end of the second elastic member (24) is connected to the inner wall of the outer shell (10). The spray assembly (11) is provided with an inclined surface that sprays water toward the water inlet (20) at the end of the protrusion (21). The inclined nozzle has a first disturbance ring (30) and a second disturbance ring (32) arranged vertically on the heat exchange tube bundle (12). The first disturbance ring (30) and the second disturbance ring (32) are fixedly connected by a connecting support plate (31). Both the first disturbance ring (30) and the second disturbance ring (32) are provided with several ribs (33). A push-pull plate (26) is fixed above the first disturbance ring (30). The push-pull plate (26) is hinged to one end of the second swing arm (25), and the other end of the second swing arm (25) is hinged to the protrusion (21).

2. The anti-scaling evaporative heat exchange device according to claim 1, characterized in that, The water hopper (20) is shaped like a shallow scoop. The end of the water hopper (20) connected to the second elastic member (24) is a free end. An overflow port (22) is provided on the free end, and a brim (23) is provided above the overflow port (22).

3. The anti-scaling evaporative heat exchange device according to claim 2, characterized in that, Both sides of the water intake bucket (20) are rotatably mounted with rotating rods, and guide plates (201) are fixedly connected to the rotating rods. Under normal conditions, the guide plates (201) on both sides are gathered at the lower side of the water intake bucket (20) and form a V-shaped airflow guiding structure.

4. The anti-scaling evaporative heat exchange device according to claim 3, characterized in that, The water-diverting bucket (20) has a guide groove (202) on the outer wall of its free end. A vertically arranged sliding plate (203) is slidably mounted in the guide groove (202). The bottom sides of the sliding plate (203) are respectively hinged to the first swing arm (206). The other end of the first swing arm (206) is hinged to the connecting rod (205). The other end of the connecting rod (205) is hinged to the end of the rotating rod. The guide groove (202) is provided with a first elastic element (207). The lower end of the first elastic element (207) is connected to the upper side of the bottom protrusion of the sliding plate (203). The upper end of the first elastic element (207) is connected to the inner wall of the upper end of the guide groove (202).

5. The anti-scaling evaporative heat exchange device according to claim 4, characterized in that, The upper end of the slide plate (203) is rotatably mounted with a bearing roller (204). The inner wall of the outer shell (10) is fixed with a wedge plate (40) by a bracket. The bearing roller (204) can abut against the wedge surface of the wedge plate (40). When the free end of the water bucket (20) rotates inward, the bearing roller (204) presses against the wedge surface of the wedge plate (40) and drives the slide plate (203) to slide downward along the guide groove (202) by the squeezing force.

6. The anti-scaling evaporative heat exchange device according to claim 5, characterized in that, When the slide plate (203) slides down, it drives the first swing arm (206) to rotate. The first swing arm (206) pulls the connecting rod (205) to move. The connecting rod (205) drives the rotating rod and the guide plate (201) to rotate outward in sync. After the guide plate (201) unfolds outward, the airflow rising from below the shell (10) can contact the bottom of the water bucket (20) over a large area, assisting the water bucket (20) to be lifted and reset.

7. The anti-scaling evaporative heat exchange device according to claim 1, characterized in that, The inner wall of the outer shell (10) near the free end of the water inlet bucket (20) is provided with an inwardly extending limiting block (17), which is used to limit the maximum stroke of the free end of the water inlet bucket (20) inward rotation.

8. The anti-scaling evaporative heat exchange device according to claim 1, characterized in that, The first disturbance ring (30) and the second disturbance ring (32) are arranged with a heat exchange tube bundle (12) between them. The ribs (33) of the first disturbance ring (30) are located on the inner and outer sides of the lower semicircle of the first disturbance ring (30), and the ribs (33) of the second disturbance ring (32) are located on the inner and outer sides of the lower semicircle of the second disturbance ring (32) and the outer side of the upper semicircle.

9. The anti-scaling evaporative heat exchange device according to claim 8, characterized in that, The first disturbance ring (30) and the second disturbance ring (32) are arranged in multiple sets according to the size of the heat exchange tube bundle (12). The first disturbance ring (30) and the second disturbance ring (32) of two adjacent sets are fixedly connected by a long rod (34). A guide sleeve (35) is fixedly installed on the inner wall of one side of the outer shell (10). A guide rod (36) is slidably inserted inside the guide sleeve (35). One end of the guide rod (36) is fixedly connected to the outermost connecting support plate (31).

10. The anti-scaling evaporative heat exchange device according to claim 1, characterized in that, A fan (16) is installed on the top of the outer shell (10). An air inlet louver (13) is provided on the wall below the heat exchange tube bundle (12) of the outer shell (10). A water collection tank (14) is provided at the bottom of the outer shell (10). The spray assembly (11) is supplied with water by the spray pump (15) drawing water from the water collection tank (14).

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