Waste heat recovery device for high-low bypass heat supply

Abstract

The invention discloses a waste heat recovery device for high and low bypass heat supply, and relates to the technical field of waste heat recovery, the waste heat recovery device comprises a heat exchanger main body of a cylindrical cavity structure, the middle end of the heat exchanger main body is fixedly connected with a heat exchange tube bundle used for being connected with a fluid pipeline in the heat exchanger main body, and the heat exchange tube bundle is cylindrical; the two ends of the heat exchanger body communicate with end covers used for sealing the heat exchange tube bundle and the heat exchanger body and providing connecting pipeline connectors, an alarm sweeping mechanism is arranged above the center of the end, close to the end covers, of the heat exchanger body, and a blocking closing mechanism is arranged at the center connecting position of the end, close to the end covers, of the heat exchanger body. Protection shielding mechanisms are arranged on the two sides of the connecting position of the end, close to the end cover, of the heat exchanger body, through mutual cooperation of an adapter rod, a connecting rod and a scraper, the alarm sweeping mechanism can monitor the flowing condition of a fluid inlet and a fluid outlet in real time, and once blockage is detected, an alarm is given out immediately.

Description

Technical Field

[0001] The invention relates to the technical field of waste heat recovery, and in particular to a waste heat recovery device for high and low bypass heating. Background Art

[0002] Waste heat recovery for high and low bypass heating is a technology that utilizes waste heat (i.e., heat energy that is not effectively utilized) generated in industrial or commercial processes. In many industrial processes, such as power plants, steel mills, chemical plants, etc., a large amount of heat energy is generated. If this heat energy is not effectively recovered and utilized, it will be dissipated in the form of waste heat, causing energy waste and environmental load. The waste heat recovery technology for high and low bypass heating installs heat exchange equipment and pipeline networks to transport this waste heat from the point of generation to where heat energy is needed, such as heating buildings, heating water sources, or driving other industrial processes. This not only reduces energy consumption and operating costs, but also helps reduce greenhouse gas emissions and improve energy efficiency, thereby promoting the realization of sustainable development in the industrial and commercial fields; There are still the following defects in specific use: 1. Long-term blockage will cause the normal circulation of the fluid inside the heat exchanger to be blocked, resulting in local overheating. Overheating may increase the thermal stress of the heat exchanger material, thereby damaging or causing deformation and cracking of the material in some areas. Blockage causes the heat transfer surface of the heat exchanger to be covered with dirt or sediment, affecting the heat transfer efficiency. Even if the heat exchanger is still running, its efficiency will be significantly reduced and it will not be able to effectively transfer heat to the fluid, thus affecting the performance of the entire system.

[0003] 2. When the heat exchanger is shut down or under maintenance, if the fluid supply pipeline is not effectively isolated, the fluid may flow back into the heat exchanger. The backflow of fluid will cause unexpected fluid flow inside the heat exchanger, which may cause unnecessary impact or damage to the heat transfer surface, and even cause damage to the internal structure of the equipment. During shutdown or maintenance, if there is still residual fluid (such as water, steam or chemical medium) inside the heat exchanger, these residues may evaporate or react chemically without circulation or cooling. This will cause the dissolved substances in the fluid to concentrate, forming precipitation or corrosive environment, causing damage to the materials and surfaces inside the heat exchanger.

[0004] In view of this, the present invention proposes a waste heat recovery device for high and low bypass heating to make up for and improve the deficiencies of the prior art. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides a waste heat recovery device for high and low bypass heating to solve the technical problems raised in the above background technology.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is: a waste heat recovery device for high and low bypass heating, comprising a heat exchanger body with a cylindrical cavity structure, a heat exchange tube bundle for connecting a fluid pipeline inside the heat exchanger body fixedly connected to the middle end of the heat exchanger body, the heat exchange tube bundle is cylindrical, and the two ends of the heat exchanger body are connected with end covers for closing the heat exchange tube bundle and the heat exchanger body and providing a connection pipeline interface, the lower end of the heat exchange tube bundle is fixedly connected with a support frame for supporting and fixing the heat exchanger body structure, the two ends of the heat exchanger body close to the end cover are threadedly connected with flanges for ensuring the sealing of the heat exchange tube bundle and the heat exchanger body, the interior of the heat exchange tube bundle is sleeved with a heat transfer medium pipeline for conveying heat transfer medium, an alarm cleaning mechanism is arranged above the center of one end of the heat exchanger body close to the end cover, a blocking closing mechanism is arranged at the center connection of one end of the heat exchanger body close to the end cover, and protective shielding mechanisms are arranged on both sides of the connection of one end of the heat exchanger body close to the end cover; The alarm cleaning mechanism is used to remove the accumulation at the inlet and outlet of the end cover to keep the fluid channel unobstructed; The blocking and closing mechanism is used to prevent the fluid from flowing back into the heat exchanger body when the heat exchanger body is shut down or maintained; The protective shielding mechanism is used to automatically shield the protective sensor when the fluid inlet or outlet is blocked.

[0007] Furthermore, the alarm cleaning mechanism includes an alarm fixedly installed inside one end of the heat exchanger body near the end cover, the lower end of the alarm near the end cover is electrically connected to a trigger switch, the trigger switch is fixedly connected to support plates on both sides near the alarm, the outer walls of the two support plates on the side away from the trigger switch are fixedly connected to connecting convex shafts, the ends of the two connecting convex shafts away from the support plates are provided with rotating shafts, the ends of the two rotating shafts away from the heat exchanger body are fixedly connected to ring gears, and the sides of the two ring gears away from the rotating shafts are provided with spiral Gear, the two helical gears are rotatably connected to a crank on one side away from the ring gear, the two cranks are rotatably connected to a rotating rod on one end away from the helical gear, the two rotating rods are rotatably connected to a rotating rod on one end away from the crank, the two rotating rods are rotatably connected to a short rod on one end away from the crank, the two short rods are rotatably connected to a transfer rod on one end away from the transfer rod, a connecting rod is provided on the outer wall of one side of the two transfer rods, the outer walls of the two connecting rods on one side close to the transfer rod are fixedly connected to a fixing buckle, and a scraper is fixedly connected to the lower end of the two fixing buckles on the side away from the transfer rod.

[0008] Furthermore, the initial position of the trigger switch conflicts with the connection of the end cover near one end of the heat exchanger body, the outer walls of the two rotating shafts are provided with an annular concave side, the two connecting convex shafts are clamped inside the annular concave side of the outer wall of the rotating shaft, and the ends of the two rotating shafts away from the connecting convex shafts are rotatably connected to the bottom inner wall of the heat exchanger body, and a pressure sensor is fixedly connected to the inside of the trigger switch.

[0009] Furthermore, the two helical gears and the ring gear are meshed with each other and form a meshing transmission, and the sides of the two helical gears away from the ring gear are rotatably connected to the inner wall of one side of the heat exchanger body through a connecting block, and the ends of the two connecting rods away from the transfer rod are rotatably connected to the inner wall of one side of the heat exchanger body through an inclined sliding rod, and the outer wall of the scraper away from the fixing buckle is fitted with both sides of the upper surface of the end cover near the connection at one end of the heat exchanger body.

[0010] Furthermore, the blocking and closing mechanism includes a fixed plate fixedly connected to the connection of the end cover near one end of the heat exchanger body, a clip is fixedly connected to an outer wall of one side of the fixed plate, a rotating block is rotatably connected to an inner wall of a side of the clip away from the fixed plate, a turntable is rotatably connected to an inner wall of a side of the fixed plate away from the heat exchanger body, a connecting handle is fixedly connected to an outer wall of a side of the turntable close to the fixed plate, a plurality of fan-shaped plates are arranged on a side of the turntable close to the bottom end of the fixed plate, and a push rod is fixedly connected to an outer wall of a side of the rotating block close to the clip.

[0011] Furthermore, a plurality of arcuate grooves are provided on one side of the fixed plate close to the end cover, and the plurality of arcuate grooves are distributed in a ring shape, and cylindrical grooves are distributed in a ring shape at adjacent parts of the plurality of arcuate grooves provided on one side of the fixed plate close to the end cover. The initial position of the rotating block is inclined, and the outer wall of the rotating block away from the buckle is in conflict with the outer wall of the support plate. The size of the fan-shaped plate is matched with the size of the plurality of arcuate grooves provided on the side of the fixed plate close to the end cover, and a through opening matched with the size of the connection at one end of the end cover close to the heat exchanger body is provided at the lower end of the fixed plate, and the initial position of the push rod is in conflict with the connecting handle.

[0012] Furthermore, a plurality of diamond-shaped grooves are provided inside the turntable, a square groove is provided on the side of the fixed plate close to the connecting handle, the connecting handle is slidably connected to the inside of the square groove provided on the side of the fixed plate close to the connecting handle, the plurality of fan-shaped plates are distributed in a ring shape, the ends of the plurality of fan-shaped plates close to the turntable are slidably connected to the diamond-shaped grooves provided inside the turntable, and the ends of the plurality of fan-shaped plates away from the turntable are slidably connected to the cylindrical grooves adjacent to the plurality of arc-shaped grooves provided on the side of the fixed plate close to the end cover.

[0013] Furthermore, the protective shielding mechanism includes an obstacle column fixedly installed on the outer walls on both sides of the lower end of the trigger switch, and the outer walls on both sides of the alarm close to the trigger switch are penetrated and fixedly connected with a pneumatic cylinder, the outer wall of the pneumatic cylinder close to the alarm is electrically connected to the touch switch, the outer wall of the pneumatic cylinder away from the touch switch is slidably connected with a telescopic rod, the telescopic rod is fixedly connected with a transfer buckle on the side away from the pneumatic cylinder, the outer wall of the pneumatic cylinder close to the telescopic rod is fixedly connected with a sleeve plate, the inner wall of the transfer buckle on the side away from the telescopic rod is rotatably connected with a long rod, the end of the long rod away from the transfer buckle is rotatably connected with an arc plate, the outer wall of the arc plate away from the long rod is fixedly connected with a shielding plate, and a plurality of triggers are arranged on the side of the shielding plate away from the arc plate.

[0014] Furthermore, the barrier column and the touch switch are in the same vertical plane, the side of the sleeve away from the touch switch is fixedly connected to the inner wall of one side of the heat exchanger body, the arc plate is diamond-shaped, and the trigger is a temperature sensor.

[0015] Furthermore, one end of the arc plate away from the long rod is rotatably connected to the inner wall of the sleeve plate away from the pneumatic cylinder, the size of the baffle plate is adapted to the size of the trigger, and the side of the multiple triggers away from the baffle plate is fixedly connected to the inner wall of the heat exchanger body.

[0016] Compared with the prior art, the present invention has the following beneficial effects: (1) The present invention utilizes the adapter rod, connecting rod and scraper to cooperate with each other, and the alarm cleaning mechanism can monitor the flow of the fluid inlet and outlet in real time. Once a blockage is detected, an alarm is immediately issued, which helps to timely discover potential problems and avoid further deterioration of the blockage problem, affecting the normal operation of the heat exchanger body. At the same time, through timely alarm, the operator can quickly take measures, such as stopping the machine for inspection, cleaning the blockage, etc. In addition, timely discovery and treatment of blockage problems can reduce downtime caused by equipment failure and reduce production losses caused by downtime for maintenance. At the same time, it can also extend the service life of the heat exchanger body and reduce the frequency and cost of equipment replacement. In addition, the arc design can better adapt to the complex structure inside the heat exchanger body, ensuring that the alarm cleaning mechanism can accurately locate the area with severe blockage or fouling during the cleaning process, and carry out targeted cleaning. This can not only improve the cleaning efficiency, but also reduce excessive cleaning and wear of non-blocked areas. Finally, the alarm cleaning mechanism can significantly reduce the degree of manual participation and reduce the labor intensity of operators. At the same time, the alarm cleaning mechanism can also improve the accuracy and consistency of cleaning and reduce errors caused by human factors; (2) The present invention utilizes the cooperation between the turntable and the fan-shaped plate. When an emergency occurs in the heat exchanger body, such as pipeline rupture, fluid leakage, etc., the blocking and closing mechanism can immediately cut off the fluid flow, prevent the accident from expanding, and protect the safety of equipment and personnel. In addition, in some cases, such as a sudden drop in system pressure or fluid backflow, the internal components of the heat exchanger body may be damaged or the normal operation of the system may be affected. The blocking and closing mechanism can prevent this from happening and ensure that the fluid flows in a predetermined direction. Furthermore, when the heat exchanger body needs to be maintained or overhauled, the blocking and closing mechanism can be used to conveniently isolate the heat exchanger body, reducing downtime and maintenance costs. In addition, the blocking and closing mechanism can reduce the wear and corrosion of the internal components of the heat exchanger body and extend the service life of the equipment. Finally, the heat exchanger body that has been running for a long time may be blocked due to impurities or sediments in the fluid. The blocking and closing mechanism can close the inlet and outlet when necessary, facilitating cleaning and unblocking work to prevent the blockage problem from getting worse. (3) The present invention utilizes the arc plate and the shielding plate to cooperate with each other. By setting a protective shielding mechanism at the fluid inlet and outlet, the trigger can be shielded in time when blockage occurs to prevent it from being directly impacted by the fluid, thereby protecting the trigger from physical damage. In addition, blockage is often accompanied by the accumulation of impurities, particulate matter and other substances in the fluid. These substances may adhere to the surface of the trigger, affecting the measurement accuracy and service life of the trigger. The protective shielding mechanism can effectively isolate these pollutants and keep the trigger clean and accurate. The trigger is an important component of the heat exchanger body and is responsible for monitoring and feedback of the system status. However, when blockage occurs, if the trigger is damaged by contamination or impact, false alarms or missed alarms may occur, affecting the normal operation of the system. The protective shielding mechanism can prevent the occurrence of such false alarms to a certain extent and improve the reliability of the system. In addition, the trigger is usually connected to the monitoring and alarm system of the system. When the protective shielding mechanism is triggered, a signal can be immediately sent to the system to prompt the operator to pay attention and take corresponding measures. This quick response mechanism helps to detect and deal with blockage problems in a timely manner, preventing the problem from expanding and causing greater damage to the system. Finally, by protecting the trigger from damage and contamination, the protective shielding mechanism can reduce the failure rate and replacement frequency of the trigger, thereby reducing the maintenance cost of the system. At the same time, the protective shielding mechanism itself also has a certain durability and reliability, and can operate stably for a long time without frequent replacement or maintenance; BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the main stereoscopic structure of the present invention; Figure 2 It is a schematic diagram of the partial three-dimensional structure of the alarm cleaning mechanism of the present invention; Figure 3 It is a three-dimensional structural diagram of the position relationship between the alarm and the trigger switch of the present invention; Figure 4 It is a three-dimensional structural schematic diagram of the positional relationship between the ring gear and the helical gear of the present invention; Figure 5 It is a three-dimensional structural schematic diagram of the position relationship between the support plate and the rotating block of the present invention; Figure 6 It is a three-dimensional structural schematic diagram of the position relationship between the fan-shaped plate and the rotating disk of the present invention; Figure 7 It is a three-dimensional structural schematic diagram of the position relationship between the barrier column and the touch switch of the present invention; Figure 8 It is a three-dimensional structural schematic diagram of the position relationship between the long rod and the shielding plate of the present invention.

[0018] The numbers in the figure are: 1, heat exchanger body; 11, heat exchange tube bundle; 12, end cover; 13, support frame; 14, flange; 15, heat transfer medium pipeline; 2, alarm cleaning mechanism; 21, alarm; 22, trigger switch; 23, support plate; 24, connecting cam; 25, rotating shaft; 26, ring gear; 27, spiral gear; 28, crank; 29, rotating rod; 210, short rod; 211, transfer rod; 212, connecting rod; 2 13. Fixing buckle; 214. Scraper; 3. Blocking closing mechanism; 31. Fixing plate; 32. Fastener; 33. Rotating block; 34. Turntable; 35. Connecting handle; 36. Fan-shaped plate; 37. Push rod; 4. Protective shielding mechanism; 41. Obstacle column; 42. Pneumatic cylinder; 43. Touch switch; 44. Telescopic rod; 45. Adapter buckle; 46. Sleeve plate; 47. Long rod; 48. Arc plate; 49. Shielding plate; 410. Trigger. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention; Embodiments of the present invention Please refer to Figure 1As shown, a waste heat recovery device for high-low bypass heating comprises a heat exchanger body (1) with a cylindrical cavity structure, a heat exchange tube bundle (11) for connecting a fluid pipeline inside the heat exchanger body (1) is fixedly connected to the middle end of the heat exchanger body (1), the heat exchange tube bundle (11) is cylindrical, and the two ends of the heat exchanger body (1) are connected with end covers (12) for sealing the heat exchange tube bundle (11) and the heat exchanger body (1) and providing a connection pipeline interface, the lower end of the heat exchange tube bundle (11) is fixedly connected with a support frame (13) for supporting and fixing the structure of the heat exchanger body (1), and the two ends of the heat exchanger body (1) close to the end cover (12) are threadedly connected with flanges (14) for ensuring the sealing of the heat exchange tube bundle (11) and the heat exchanger body (1), and the heat exchange tube bundle (11) is sleeved with a heat transfer medium pipeline (15) for conveying heat transfer medium. Please refer to Figure 2 As shown, an alarm cleaning mechanism (2) is provided above the center of one end of the heat exchanger body (1) close to the end cover (12), a blocking closing mechanism (3) is provided at the center connection of one end of the heat exchanger body (1) close to the end cover (12), and protective shielding mechanisms (4) are provided on both sides of the connection of one end of the heat exchanger body (1) close to the end cover (12); Please refer to Figure 3 to Figure 4 As shown, preferably, the alarm cleaning mechanism (2) is used to remove the accumulation at the inlet and outlet of the end cover (12) to keep the fluid channel unobstructed; Please refer to Figure 3As shown, as a preference, the alarm cleaning mechanism (2) comprises an alarm (21) fixedly mounted inside one end of the heat exchanger body (1) close to the end cover (12); the lower end of the alarm (21) close to the end cover (12) is electrically connected to a trigger switch (22); both sides of the trigger switch (22) close to the alarm (21) are fixedly connected to support plates (23); the outer walls of the two support plates (23) on the side away from the trigger switch (22) are fixedly connected to connecting convex shafts (24); the ends of the two connecting convex shafts (24) away from the support plates (23) are provided with rotating shafts (25); the ends of the two rotating shafts (25) away from the heat exchanger body (1) are fixedly connected to ring gears (26); the sides of the two ring gears (26) away from the rotating shafts (25) are provided with helical gears (27); The side of the helical gear (27) away from the ring gear (26) is rotatably connected to a crank (28), the ends of the two cranks (28) away from the helical gear (27) are rotatably connected to a rotating rod (29), the ends of the two rotating rods (29) away from the crank (28) are rotatably connected to the rotating rod (29), the ends of the two rotating rods (29) away from the crank (28) are rotatably connected to a short rod (210), the ends of the two short rods (210) away from the rotating rod (29) are rotatably connected to a transfer rod (211), a connecting rod (212) is provided on one side outer wall of the two transfer rods (211), the outer walls of the two connecting rods (212) on one side close to the transfer rod (211) are fixedly connected to a fixing buckle (213), and the lower ends of the two fixing buckles (213) on one side away from the transfer rod (211) are fixedly connected to a scraper (214); Please refer to Figure 4 As shown, as a preferred embodiment, the initial position of the trigger switch (22) conflicts with the connection of the end cover (12) near one end of the heat exchanger body (1), the outer walls of the two rotating shafts (25) are provided with an annular concave side, the two connecting convex shafts (24) are clamped inside the annular concave side of the outer wall of the rotating shaft (25), and the ends of the two rotating shafts (25) away from the connecting convex shafts (24) are rotatably connected to the bottom inner wall of the heat exchanger body (1), and the inside of the trigger switch (22) is fixedly connected with a pressure sensor, and the rotation of the crank 28 drives the rotating rod 29 to move back and forth to make the transfer rod 211 and the connecting rod 212 deflect back and forth to achieve the scraper 214 moving along an arc trajectory to scrape the connection of the end cover 12 near one end of the heat exchanger body 1; Please refer to Figure 4As shown, preferably, the two helical gears (27) and the ring gear (26) are meshed with each other and form a meshing transmission, the sides of the two helical gears (27) away from the ring gear (26) are rotatably connected to the inner wall of one side of the heat exchanger body (1) through a connecting block, and the ends of the two connecting rods (212) away from the transfer rod (211) are rotatably connected to the inner wall of one side of the heat exchanger body (1) through an inclined sliding rod, and the outer wall of the scraper (214) away from the fixing buckle (213) is in contact with both sides of the upper surface of the end cover (12) near the connection at one end of the heat exchanger body (1), and the alarm cleaning mechanism 2 can monitor the flow of the fluid inlet and outlet in real time, and once a blockage is detected, an alarm is immediately issued, which helps to timely discover potential problems; Please refer to Figures 5 and 6 As shown, preferably, the blocking and closing mechanism (3) is used to prevent the fluid from flowing back into the interior of the heat exchanger body (1) when the heat exchanger body (1) is shut down or maintained; Please refer to Figure 5 As shown, as a preference, the blocking closing mechanism (3) comprises a fixing plate (31) fixedly connected to a connection portion of the end cover (12) close to one end of the heat exchanger body (1), a clip (32) being fixedly connected to an outer wall of one side of the fixing plate (31), a rotating block (33) being rotatably connected to an inner wall of a side of the clip (32) away from the fixing plate (31), a rotating disk (34) being rotatably connected to an inner wall of a side of the fixing plate (31) away from the heat exchanger body (1), a connecting handle (35) being fixedly connected to an outer wall of a side of the rotating disk (34) close to the fixing plate (31), a plurality of fan-shaped plates (36) being arranged on a side of the rotating disk (34) close to the bottom end of the fixing plate (31), and a pushing rod (37) being fixedly connected to an outer wall of a side of the rotating block (33) close to the clip (32); Please refer to Figure 6As shown, as a preference, a plurality of arcuate grooves are provided on a side of the fixed plate (31) close to the end cover (12), the plurality of arcuate grooves provided on the side of the fixed plate (31) close to the end cover (12) are distributed in an annular manner, and adjacent portions of the plurality of arcuate grooves provided on the side of the fixed plate (31) close to the end cover (12) are also provided with annularly distributed cylindrical grooves, the initial position of the rotating block (33) is inclined, the outer wall of the side of the rotating block (33) away from the buckle (32) is in conflict with the outer wall of the support plate (23), and the size of the fan-shaped plate (36) is similar to that of the fixed plate (31). A plurality of arc-shaped grooves having sizes matching those of the end cover (12) are provided on one side of the fixed plate (31), and a through opening having sizes matching those of the end cover (12) connected to one end of the heat exchanger body (1) is provided at the lower end of the fixed plate (31). The initial position of the push rod (37) is in conflict with the connecting handle (35). The clockwise rotation of the rotating disk 34 drives the plurality of fan-shaped plates 36 to be synchronously deflected to a gathered state, thereby covering and closing the through opening having sizes matching those of the end cover 12 connected to one end of the heat exchanger body 1 at the lower end of the fixed plate 31. Please refer to Figure 6 As shown, preferably, a plurality of diamond-shaped grooves are provided inside the rotating disk (34), a square groove is provided on a side of the fixed plate (31) close to the connecting handle (35), the connecting handle (35) is slidably connected to the inside of the square groove provided on the side of the fixed plate (31) close to the connecting handle (35), the plurality of fan-shaped plates (36) are distributed in a ring shape, the ends of the plurality of fan-shaped plates (36) close to the rotating disk (34) are slidably connected to the diamond-shaped grooves provided inside the rotating disk (34), and the ends of the plurality of fan-shaped plates (36) away from the rotating disk (34) are slidably connected to the cylindrical grooves adjacent to the plurality of arc-shaped grooves provided on the side of the fixed plate (31) close to the end cover (12), and by blocking the closing mechanism 3, the flow of the fluid can be immediately cut off to prevent the accident from expanding; Please refer to Figures 7 and 8 As shown, preferably, the protective shielding mechanism (4) is used to automatically shield the protective sensor when the fluid inlet or outlet is blocked; Please refer to Figure 7As shown, as a preference, the protective shielding mechanism (4) comprises an obstacle column (41) fixedly mounted on the outer walls on both sides of the lower end of the trigger switch (22); the outer walls on both sides of the alarm (21) close to the trigger switch (22) are penetrated and fixedly connected with a pneumatic cylinder (42); the outer wall on one side of the pneumatic cylinder (42) close to the alarm (21) is electrically connected to a touch switch (43); the outer wall on one side of the pneumatic cylinder (42) away from the touch switch (43) is slidably connected to a telescopic rod (44); the telescopic rod (44) is on the side away from the pneumatic cylinder (42). A transfer buckle (45) is fixedly connected, a sleeve plate (46) is fixedly connected to an outer wall of a side of the pneumatic cylinder (42) close to the telescopic rod (44), a long rod (47) is rotatably connected to an inner wall of a side of the transfer buckle (45) away from the telescopic rod (44), an arc-shaped plate (48) is rotatably connected to an end of the long rod (47) away from the transfer buckle (45), a shielding plate (49) is fixedly connected to an outer wall of an end of the arc-shaped plate (48) away from the long rod (47), and a plurality of triggers (410) are provided on a side of the shielding plate (49) away from the arc-shaped plate (48); Please refer to Figure 8 As shown, preferably, the barrier column (41) and the touch switch (43) are located in the same vertical plane, the side of the sleeve plate (46) away from the touch switch (43) is fixedly connected to the inner wall of one side of the heat exchanger body (1), the arc plate (48) is in a rhombus shape, the trigger (410) is a temperature sensor, and the upward deflection of the arc plate 48 will synchronously drive the shielding plate 49 to deflect upward, and the trigger 410 is fixedly connected to the inner wall of one side of the heat exchanger body 1, and the upward deflection of the shielding plate 49 will achieve protective covering of the trigger 410; Please refer to Figure 8 As shown, preferably, one end of the arc plate (48) away from the long rod (47) is rotatably connected to the inner wall of the sleeve plate (46) away from the pneumatic cylinder (42), the size of the baffle plate (49) is compatible with the size of the trigger (410), and one side of the plurality of triggers (410) away from the baffle plate (49) is fixedly connected to the inner wall of the heat exchanger body (1), and by arranging a protective shielding mechanism 4 at the fluid inlet and outlet, the trigger 410 can be shielded in time when blockage occurs to prevent it from being directly impacted by the fluid.

[0020] The following are the complete usage steps and working principles of the above embodiment: The device is mainly used for: Figure 1As shown, when performing high and low roadside heating preheating recovery, first, there will be one or more sources of waste heat in the system, such as exhaust gas, furnace fire, cooling water or other working media in industrial processes. These waste heat usually exist in the form of high temperature. Secondly, supports and brackets are used to support and fix the heat exchanger body 1 to ensure its stability and reliability during installation and operation. Then the waste heat is first transferred to the heat transfer medium (such as water or air) through the heat exchanger body 1. These heat transfer media are called "high bypass" and "low bypass". Usually, high bypass refers to a fluid with a higher temperature, and low bypass refers to a fluid with a lower temperature. They flow through the heat exchange tube bundle 11 in the heat exchanger body 1. Secondly, inside the heat exchanger body 1, the waste heat is transferred to the heat exchanger body 1 through heat conduction. The heat transfer medium pipeline 15, such as high bypass water, transfers heat from the high-temperature waste heat source to the high bypass fluid, so that the temperature of the high bypass heat transfer medium increases. In addition, the heat exchange tube bundle 11 and the heat exchanger body 1 are connected by a flange 14 through threads, so that the transfer medium can flow between the heat transfer medium pipeline 15 and the heat exchanger body 1 to achieve heat transfer and exchange. Furthermore, after heat exchange, the low bypass heat transfer medium (such as water) brings the heat energy to the low-temperature heat energy use point. After the heat exchange process is completed, the cooling fluid and the heating fluid flow out from the outlet of the end cover 12 of the heat exchanger body 1, such as the heating system of a building or other applications that require heating. In this way, the waste heat is effectively converted into usable heat energy through the heat exchanger, thereby achieving energy reuse and energy saving; The alarm cleaning mechanism 2 is used to remove the accumulation at the inlet and outlet of the end cover 12 to keep the fluid passage unobstructed. When used specifically: like Figure 3 to Figure 4 As shown, when dirt, sediment or biofilm accumulates near the inlet and outlet of the heat exchanger body 1 near the end cover 12, when the trigger switch 22 detects the preset trigger condition, that is, the excessively large sediment accumulated will touch the trigger switch 22, and then the trigger switch 22 moves upward. Furthermore, a pressure sensor is fixedly connected inside the trigger switch 22. The trigger switch 22 detects a certain physical quantity or a specific state change in the environment, and converts this information into an electrical signal. This electrical signal is sent to the trigger switch 22. After receiving the signal, the trigger switch 22 will activate the alarm mechanism of the alarm 21, such as making a sound or starting signal transmission. Therefore, the alarm 21 emits a sound or light signal and sends an alarm signal to remind the operator that the inlet and outlet of the end cover 12 are blocked and need to be paid attention to or handled. In addition, when the trigger switch 22 moves upward, since the two sides of the trigger switch 22 are fixedly connected to the support plates 23, and the connecting convex shafts 24 fixedly connected to the support plates 23 are clamped in the annular grooves on the outer wall of the rotating shaft 25, the upward movement of the trigger switch 22 will cause the connecting convex shafts 24 to push the rotating shaft 25 to rotate. Furthermore, the top of the rotating shaft 25 is also fixedly connected to the ring gear 26, and the ring gear 26 and the helical gear 27 are meshed with each other to form a meshing transmission, so that the rotation of the rotating shaft 25 will synchronously drive the ring gear 26 to rotate. The annular gear 26 rotates, and the rotation of the ring gear 26 drives the helical gear 27 to rotate. In addition, the lower end of the helical gear 27 is also rotatably connected to a crank 28, and the end of the crank 28 away from the helical gear 27 is also rotatably connected to a rotating rod 29, and the end of the rotating rod 29 away from the crank 28 is rotatably connected to a short rod 210, and when the helical gear 27 rotates, the crank 28 is driven to rotate counterclockwise, and the counterclockwise rotation of the crank 28 pulls the rotating rod 29 to move to the right, and the movement of the rotating rod 29 to the right drives the short rod 210 to rotate counterclockwise. The rod 210 deflects to the left, so the transfer rod 211 connected to one end of the short rod 210 will deflect to the left counterclockwise along with the counterclockwise deflection of the short rod 210 to the left. Furthermore, the outer wall of the transfer rod 211 is fixedly connected with a fixing buckle 213, and one end of the fixing buckle 213 is fixedly connected with a connecting rod 212. The connecting rod 212 is also rotatably connected to the inner wall of the heat exchanger body 1 through an inclined sliding rod. Therefore, when the transfer rod 211 deflects to the left counterclockwise, it will pull the connecting rod 212 to deflect to the left counterclockwise. The scraper 214 fixedly connected to the lower end of the fixing buckle 213 will move in an arc trajectory synchronously with the counterclockwise deflection of the transfer rod 211 and the connecting rod 212 to the left, so as to achieve uniform scraping of the blocked accumulation at the connection of the end cover 12 close to one end of the heat exchanger body 1. In summary, the rotation of the crank 28 drives the rotating rod 29 to move back and forth left and right, so that the transfer rod 211 and the connecting rod 212 are deflected back and forth left and right, so that the scraper 214 moves along the arc trajectory to scrape the connection of the end cover 12 close to one end of the heat exchanger body 1.

[0021] Summary 1: Compared with the prior art equipment which may overheat, be damaged or even cause safety accidents due to long-term blockage, the present mechanism realizes that the rotation of the crank 28 drives the rotating rod 29 to move back and forth, so that the transfer rod 211 and the connecting rod 212 can be deflected back and forth to realize that the scraper 214 moves along an arc trajectory to scrape the connection between the end cover 12 and one end of the heat exchanger body 1. The alarm cleaning mechanism 2 can monitor the flow of the fluid inlet and outlet in real time. Once a blockage is detected, an alarm is immediately issued, which helps to discover potential problems in time and avoid further deterioration of the blockage problem, affecting the heat exchanger body 1. Normal operation, and through timely alarm, the operator can quickly take measures, such as stopping for inspection, clearing blockages, etc. In addition, timely discovery and handling of blockage problems can reduce downtime caused by equipment failure and reduce production losses caused by downtime for maintenance. At the same time, it can also extend the service life of the heat exchanger body 1 and reduce the frequency and cost of equipment replacement. Furthermore, the arc design can better adapt to the complex internal structure of the heat exchanger body 1, ensuring that the alarm cleaning mechanism 2 can accurately locate the area with severe blockage or fouling during the cleaning process, and carry out targeted cleaning. This can not only improve the cleaning efficiency, but also reduce excessive cleaning and wear of non-blocked areas. Finally, the alarm cleaning mechanism 2 can significantly reduce the degree of manual participation and reduce the labor intensity of operators. At the same time, the alarm cleaning mechanism 2 can also improve the accuracy and consistency of cleaning and reduce errors caused by human factors. The blocking closing mechanism 3 is used to prevent the fluid from flowing back into the heat exchanger body 1 when the heat exchanger body 1 is shut down or maintained. The specific use of the mechanism is: like Figures 5 and 6 As shown in the figure, when the support plate 23 moves up, since the outer wall of the support plate 23 contacts the outer wall of the rotating block 33, the upward movement of the support plate 23 will push the rotating block 33 to deflect to the side away from the connecting convex shaft 24, and then the push rod 37 fixedly connected to one end of the rotating block 33 close to the buckle 32 will push the connecting handle 35 to slide in the square groove opened on the outer wall of the fixed plate 31, so that the sliding of the connecting handle 35 will cause the rotating disk 34 rotatably connected to the inside of the fixed plate 31 to rotate clockwise, thereby rotating the rotating disk 34 clockwise. The clockwise rotation will synchronously drive the multiple sector plates 36 to slide in the diamond grooves provided inside the turntable 34, and at the same time, the end of the sector plate 36 away from the fixed plate 31 will slide in the cylindrical groove adjacent to the multiple arc grooves provided at the bottom end of the fixed plate 31, thereby the multiple sector plates 36 are synchronously deflected to the gathered state through the clockwise rotation of the turntable 34, so as to cover and close the through opening provided at the lower end of the fixed plate 31 and having a size matching the connection of the end cover 12 close to the end of the heat exchanger body 1; Summary 2: Compared with the prior art, the heat exchanger body 1 is affected by the fluid during shutdown or maintenance, and the fluid may flow back or remain, resulting in equipment failure or damage. The present mechanism realizes that the clockwise rotation of the turntable 34 drives multiple fan-shaped plates 36 to synchronously deflect to a gathered state, so as to block and close the through-hole at the lower end of the fixed plate 31 that is matched with the size of the connection at the end of the end cover 12 close to the heat exchanger body 1. When an emergency occurs in the heat exchanger body 1, such as pipeline rupture, fluid leakage, etc., the fluid flow can be immediately cut off by blocking the closing mechanism 3 to prevent the accident from expanding and protect the safety of equipment and personnel. In addition, in some cases, such as a sudden decrease in system pressure or fluid backflow Flow may cause damage to the internal components of the heat exchanger body 1 or affect the normal operation of the system. The blocking and closing mechanism 3 can prevent this from happening and ensure that the fluid flows in a predetermined direction. Furthermore, when the heat exchanger body 1 needs to be maintained or overhauled, the blocking and closing mechanism 3 can be used to conveniently isolate the heat exchanger body 1, reducing downtime and maintenance costs. In addition, by blocking the closing mechanism 3, the wear and corrosion of the internal components of the heat exchanger body 1 can be reduced, and the service life of the equipment can be extended. Finally, the heat exchanger body 1 that has been running for a long time may be blocked due to impurities or sediments in the fluid. The blocking and closing mechanism 3 can close the inlet and outlet when necessary, which is convenient for cleaning and unblocking work to prevent the blockage problem from worsening. The protective shielding mechanism 4 is used to automatically shield the protective sensor when the fluid inlet and outlet are blocked. When the mechanism is used specifically: like Figures 7 and 8 As shown, when the trigger switch 22 moves upward, since the outer wall of the trigger switch 22 is fixedly connected to the telescopic rod 44, when the trigger switch 22 moves to the point where the telescopic rod 44 touches the touch switch 43, the pneumatic cylinder 42 is activated, thereby driving the adapter buckle 45 to extend to the right side. Furthermore, one end of the telescopic rod 44 is also fixedly connected to the adapter buckle 45, and the adapter buckle 45 is rotatably connected to the inner wall of the side away from the pneumatic cylinder 42. Therefore, the extension of the pneumatic cylinder 42 will cause the arc plate 48 to deflect upward. At the same time, the arc plate 48 is also rotatably connected to the inner wall of the side of the sleeve plate 46 away from the pneumatic cylinder 42. Furthermore, the outer wall of the end of the arc plate 48 away from the long rod 47 is also fixedly connected to the shielding plate 49. Therefore, the upward deflection of the arc plate 48 will synchronously drive the shielding plate 49 to deflect upward. Furthermore, the trigger 410 is fixedly connected to the inner wall of one side of the heat exchanger body 1, and then the upward deflection of the shielding plate 49 will realize the protective covering of the trigger 410. Summary 3: Compared with the prior art, when blockage occurs inside the heat exchanger body 1, the flow of the fluid may be hindered, resulting in adverse conditions such as increased pressure and changes in flow rate. These conditions may cause impact or damage to the trigger 410 installed near the fluid inlet and outlet. The present mechanism realizes that the upward deflection of the arc plate 48 will synchronously drive the shielding plate 49 to deflect upward. Furthermore, the trigger 410 is fixedly connected to the inner wall of one side of the heat exchanger body 1, and then the upward deflection of the shielding plate 49 will achieve protective covering of the trigger 410. By providing a protective shielding mechanism 4 at the fluid inlet and outlet, the trigger 410 can be shielded in time when blockage occurs to prevent it from being directly impacted by the fluid, thereby protecting the trigger 410 from physical damage. Furthermore, blockage is often accompanied by the accumulation of impurities, particulate matter and other substances in the fluid. These substances may adhere to the surface of the trigger 410, affecting the measurement accuracy and service life of the trigger 410. The protective shielding mechanism 4 can effectively isolate these pollutants and keep the trigger 410 clean and accurate. Moreover, the trigger 410 is an important component of the heat exchanger body 1, responsible for monitoring and feedback of the system status. However, when a blockage occurs, if the trigger 410 is damaged by pollution or impact, false alarms or missed alarms may occur, affecting the normal operation of the system. The protective shielding mechanism 4 can prevent the occurrence of such false alarms to a certain extent and improve the reliability of the system. Furthermore, the trigger 410 is usually connected to the monitoring and alarm system of the system. When the protective shielding mechanism 4 is triggered, a signal can be immediately sent to the system to prompt the operator to pay attention and take corresponding measures. This rapid response mechanism helps to detect and deal with blockage problems in a timely manner, avoiding the expansion of the problem and causing greater damage to the system. Finally, by protecting the trigger 410 from damage and pollution, the protective shielding mechanism 4 can reduce the failure rate and replacement frequency of the trigger 410, thereby reducing the maintenance cost of the system. At the same time, the protective shielding mechanism 4 itself also has a certain durability and reliability, and can operate stably for a long time without frequent replacement or maintenance. Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A waste heat recovery device for high-low bypass heating, comprising a heat exchanger body (1) of a cylindrical cavity structure, a heat exchange tube bundle (11) for connecting a fluid pipeline inside the heat exchanger body (1) being fixedly connected to the middle end of the heat exchanger body (1), the heat exchange tube bundle (11) being cylindrical, and end covers (12) for sealing the heat exchange tube bundle (11) and the heat exchanger body (1) and providing a connection pipeline interface being communicated at both ends of the heat exchanger body (1), a support frame (13) for supporting and fixing the structure of the heat exchanger body (1) being fixedly connected to the lower end of the heat exchange tube bundle (11), flanges (14) for ensuring the sealing of the heat exchange tube bundle (11) and the heat exchanger body (1) being threadedly connected at both ends of the heat exchanger body (1) close to the end covers (12), and a heat transfer medium pipeline (15) for conveying a heat transfer medium being sleeved inside the heat exchange tube bundle (11), Features: An alarm cleaning mechanism (2) is provided above the center of one end of the heat exchanger body (1) close to the end cover (12); a blocking closing mechanism (3) is provided at the center connection of one end of the heat exchanger body (1) close to the end cover (12); and protective shielding mechanisms (4) are provided on both sides of the connection of one end of the heat exchanger body (1) close to the end cover (12); The alarm cleaning mechanism (2) is used to remove the accumulation at the inlet and outlet of the end cover (12) to keep the fluid passage unobstructed; The blocking and closing mechanism (3) is used to prevent the fluid from flowing back into the interior of the heat exchanger body (1) when the heat exchanger body (1) is shut down or maintained; The protective shielding mechanism (4) is used to automatically shield the protective sensor when the fluid inlet or outlet is blocked.

2. A waste heat recovery device for high and low bypass heating according to claim 1, Features: The alarm cleaning mechanism (2) comprises an alarm (21) fixedly mounted inside one end of the heat exchanger body (1) close to the end cover (12); the lower end of the alarm (21) close to the end cover (12) is electrically connected to a trigger switch (22); both sides of the trigger switch (22) close to the alarm (21) are fixedly connected to support plates (23); the outer walls of the two support plates (23) on a side away from the trigger switch (22) are fixedly connected to connecting convex shafts (24); the ends of the two connecting convex shafts (24) away from the support plates (23) are provided with rotating shafts (25); the ends of the two rotating shafts (25) away from the heat exchanger body (1) are fixedly connected to ring gears (26); the sides of the two ring gears (26) away from the rotating shafts (25) are provided with helical gears (27); the two helical gears The ends of the two cranks (28) away from the helical gear (27) are rotatably connected to a crank (28); the ends of the two cranks (28) away from the helical gear (27) are rotatably connected to a rotating rod (29); the ends of the two rotating rods (29) away from the crank (28) are rotatably connected to the rotating rod (29); the ends of the two rotating rods (29) away from the crank (28) are rotatably connected to a short rod (210); the ends of the two short rods (210) away from the rotating rod (29) are rotatably connected to a transfer rod (211); the outer walls of one side of the two transfer rods (211) are provided with connecting rods (212); the outer walls of the two connecting rods (212) on the side close to the transfer rod (211) are fixedly connected to fixing buckles (213); and the lower ends of the two fixing buckles (213) away from the transfer rod (211) are fixedly connected to scrapers (214).

3. A waste heat recovery device for high and low bypass heating according to claim 2, Features: The initial position of the trigger switch (22) is in conflict with the connection of the end cover (12) close to one end of the heat exchanger body (1), the outer walls of the two rotating shafts (25) are provided with an annular concave side, the two connecting convex shafts (24) are clamped inside the annular concave side of the outer wall of the rotating shaft (25), the ends of the two rotating shafts (25) away from the connecting convex shafts (24) are rotatably connected to the bottom inner wall of the heat exchanger body (1), and the interior of the trigger switch (22) is fixedly connected with a pressure sensor.

4. A waste heat recovery device for high and low bypass heating according to claim 2, Features: The two helical gears (27) and the ring gear (26) are meshed with each other to form a meshing transmission. The sides of the two helical gears (27) away from the ring gear (26) are rotatably connected to the inner wall of one side of the heat exchanger body (1) through a connecting block. The ends of the two connecting rods (212) away from the transfer rod (211) are rotatably connected to the inner wall of one side of the heat exchanger body (1) through an inclined sliding rod. The outer wall of the scraper (214) away from the fixing buckle (213) is in contact with both sides of the upper surface of the end cover (12) near the connection at one end of the heat exchanger body (1).

5. A waste heat recovery device for high and low bypass heating according to claim 2, Features: The blocking and closing mechanism (3) comprises a fixing plate (31) fixedly connected to a connection portion of the end cover (12) close to one end of the heat exchanger body (1); a clip (32) is fixedly connected to an outer wall of one side of the fixing plate (31); a rotating block (33) is rotatably connected to an inner wall of a side of the fixing plate (31) away from the fixing plate (31); a rotating disk (34) is rotatably connected to an inner wall of a side of the fixing plate (31) away from the heat exchanger body (1); a connecting handle (35) is fixedly connected to an outer wall of a side of the rotating disk (34) close to the fixing plate (31); a plurality of fan-shaped plates (36) are arranged on a side of the rotating disk (34) close to the bottom end of the fixing plate (31); and a pushing rod (37) is fixedly connected to an outer wall of a side of the rotating block (33) close to the clip (32).

6. A waste heat recovery device for high and low bypass heating according to claim 5, Features: A plurality of arcuate grooves are provided on a side of the fixed plate (31) close to the end cover (12); the plurality of arcuate grooves provided on the side of the fixed plate (31) close to the end cover (12) are distributed in an annular manner; cylindrical grooves are provided adjacent to the plurality of arcuate grooves provided on the side of the fixed plate (31) close to the end cover (12); the initial position of the rotating block (33) is inclined; the outer wall of the side of the rotating block (33) away from the buckle (32) abuts against the outer wall of the support plate (23); the size of the fan-shaped plate (36) is adapted to the size of the plurality of arcuate grooves provided on the side of the fixed plate (31) close to the end cover (12); a through opening adapted to the size of a connection portion of the end cover (12) close to the heat exchanger body (1) is provided at the lower end of the fixed plate (31); the initial position of the push rod (37) abuts against the connecting handle (35).

7. A waste heat recovery device for high and low bypass heating according to claim 5, Features: A plurality of diamond-shaped grooves are provided inside the rotating disk (34), a square groove is provided on a side of the fixed plate (31) close to the connecting handle (35), the connecting handle (35) is slidably connected to the inside of the square groove provided on the side of the fixed plate (31) close to the connecting handle (35), the plurality of fan-shaped plates (36) are distributed in a ring shape, one end of the plurality of fan-shaped plates (36) close to the rotating disk (34) is slidably connected to the diamond-shaped groove provided inside the rotating disk (34), and one end of the plurality of fan-shaped plates (36) away from the rotating disk (34) is slidably connected to the columnar groove adjacent to the plurality of arc-shaped grooves provided on the side of the fixed plate (31) close to the end cover (12).

8. A waste heat recovery device for high and low bypass heating according to claim 2, Features: The protective shielding mechanism (4) comprises an obstacle column (41) fixedly mounted on the outer walls on both sides of the lower end of the trigger switch (22); the outer walls on both sides of the alarm (21) close to the trigger switch (22) are penetrated and fixedly connected with a pneumatic cylinder (42); the outer wall on one side of the pneumatic cylinder (42) close to the alarm (21) is electrically connected to a touch switch (43); the outer wall on one side of the pneumatic cylinder (42) away from the touch switch (43) is slidably connected to a telescopic rod (44); the telescopic rod (44) is fixedly connected to a side away from the pneumatic cylinder (42); A transfer buckle (45), an outer wall of a side of the pneumatic cylinder (42) close to the telescopic rod (44) is fixedly connected to a sleeve plate (46), an inner wall of a side of the transfer buckle (45) away from the telescopic rod (44) is rotatably connected to a long rod (47), an end of the long rod (47) away from the transfer buckle (45) is rotatably connected to an arc plate (48), an outer wall of an end of the arc plate (48) away from the long rod (47) is fixedly connected to a shielding plate (49), and a side of the shielding plate (49) away from the arc plate (48) is provided with a plurality of triggers (410).

9. A waste heat recovery device for high and low bypass heating according to claim 8, Features: The barrier column (41) and the touch switch (43) are located on the same vertical plane; the side of the sleeve plate (46) away from the touch switch (43) is fixedly connected to an inner wall of one side of the heat exchanger body (1); the arc plate (48) is in a diamond shape; and the trigger (410) is a temperature sensor.

10. A waste heat recovery device for high and low bypass heating according to claim 8, Features: One end of the arc plate (48) away from the long rod (47) is rotatably connected to the inner wall of the sleeve plate (46) away from the pneumatic cylinder (42); the size of the baffle plate (49) is compatible with the size of the trigger (410); and one side of the plurality of triggers (410) away from the baffle plate (49) is fixedly connected to the inner wall of the heat exchanger body (1).

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