Corrosion-resistant sewage pipeline waste heat recovery device

Abstract

The utility model relates to waste heat recovery technical field discloses a kind of corrosion-resistant sewage pipeline waste heat recovery devices, including recovery machine, the water outlet pipe is fixedly connected in the recovery machine, the water inlet pipe is fixedly connected in the recovery machine, the heat exchange fin is arranged in the recovery machine, the filter assembly is arranged in the water outlet pipe, the filter assembly includes filter screen, the filter screen slidingly connects in the water outlet pipe, the left and right symmetrical connecting shaft is fixedly connected to filter screen outer wall.The utility model in the present application, by pressing press bar, so that sliding shaft slides in connecting shaft, then drives limit post to separate from the slot engagement and realizes unlocking, after unlocking, using personnel can directly disassemble filter screen, so as to realize the effect of quick disassembly and cleaning maintenance filter screen, solve the problem of heat exchange component blockage caused by long downtime, impurity interception not in time due to filter screen cleaning maintenance cumbersome in prior art, improve the sustained heat exchange efficiency of device.

Description

Technical Field

[0001] This utility model relates to the field of waste heat recovery technology, and in particular to a corrosion-resistant waste heat recovery device for sewage pipelines. Background Technology

[0002] Against the backdrop of the global energy structure transitioning towards a low-carbon model, the recovery and utilization of low-grade waste heat has become an important way to improve energy efficiency. Urban sewage, as a stable waste heat resource, has the characteristics of wide availability and small temperature fluctuations. However, sewage contains a large amount of corrosive substances and suspended solids. Traditional waste heat recovery equipment is susceptible to corrosion and blockage during long-term operation, resulting in a sharp drop in heat exchange efficiency and a surge in maintenance costs, which limits the large-scale utilization of waste heat from sewage.

[0003] In existing technologies, waste heat recovery devices for sewage pipelines mostly adopt conventional heat exchange structures. Their mechanical structure typically includes heat exchange components fixed inside the pipeline, an external heat transfer medium circulation system, and a simple insulation layer. The technical principle is based on indirect heat exchange: as sewage flows inside the pipeline, heat is transferred to the heat transfer medium on the other side through the metal wall of the heat exchange components. The heat transfer medium is then transported by a circulation pump to a heat pump unit for heating and hot water supply. After releasing heat, the heat transfer medium returns to the heat exchange components to complete the cycle. To cope with certain corrosiveness, some devices use ordinary stainless steel or apply a basic anti-corrosion coating, but they do not have a systematic corrosion-resistant design for the complex composition of sewage.

[0004] However, a prominent problem with existing technologies is that suspended solids in sewage can easily enter the gaps of heat exchange components or adhere to the heat exchange surface, leading to pipe blockage and reduced fluid flow area. This not only reduces heat exchange efficiency but also exacerbates the erosion and corrosion of heat exchange components due to increased local flow velocity, significantly shortening the service life of the equipment and increasing the cost of frequent shutdowns for cleaning and maintenance. To address these issues, a corrosion-resistant waste heat recovery device for sewage pipelines is proposed. Summary of the Invention

[0005] To overcome the above shortcomings, this utility model provides a corrosion-resistant waste heat recovery device for sewage pipelines, which aims to improve the problems in the prior art where suspended solids in sewage can easily enter the heat exchange components, leading to pipe blockage, reduced heat exchange efficiency, shortened equipment service life, and increased maintenance costs.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A corrosion-resistant waste heat recovery device for sewage pipelines includes a recovery machine, an outlet pipe and an inlet pipe fixedly connected inside the recovery machine, heat exchange fins inside the recovery machine, and a filter assembly inside the outlet pipe.

[0008] The filter assembly includes a filter screen, which is slidably connected inside the outlet pipe. A symmetrical connecting shaft is fixedly connected to the outer wall of the filter screen. A symmetrical sliding shaft is slidably connected inside each of the two connecting shafts. A limiting post is fixedly connected to one end of each of the two sliding shafts. A pressing rod is fixedly connected to the outer wall of each of the two sliding shafts, and the pressing rod slides inside the connecting shaft. Multiple slots are provided inside the inlet pipe, and the limiting post engages with the slots. A spring is provided inside each of the two connecting shafts, and both ends of the spring are fixedly connected to the side wall of the sliding shaft. A connecting pipe is slidably connected to one end of the inlet pipe, and a connecting assembly is provided on the outer wall of the inlet pipe.

[0009] Furthermore, the connecting assembly includes a first connecting ring and a second connecting ring, both of which are slidably connected to the outer wall of the water inlet pipe.

[0010] Furthermore, both the inner walls of the first connecting ring and the second connecting ring are fixedly connected with sealing rings, and the sealing rings are in contact with the connection between the water inlet pipe and the connecting pipe.

[0011] Furthermore, the outer wall of the first connecting ring is fixedly connected with symmetrical fixing blocks, and the outer wall of the second connecting ring is fixedly connected with symmetrical support blocks.

[0012] Furthermore, both of the support blocks have limit grooves inside, and both of the fixing blocks have connecting columns fixedly connected to their bottoms.

[0013] Furthermore, each of the two connecting columns is slidably connected with a left-right symmetrical limiting ball, which engages with the limiting groove.

[0014] Furthermore, a pull rod is slidably connected inside the fixing block, and a spring is sleeved on the outer wall of the pull rod.

[0015] Furthermore, one end of the spring is fixedly connected to the outer wall of the pull rod, and the other end is fixedly connected to the inner wall of the fixing block. A pressing column is fixedly connected to the outer wall of the pull rod, and the pressing column is in contact with the limiting ball.

[0016] This utility model has the following beneficial effects:

[0017] 1. In this utility model, the sliding shaft slides inside the connecting shaft by pressing the pressing rod, and then drives the limiting post to disengage from the slot to unlock. After unlocking, the user can directly disassemble the filter screen, thereby achieving the effect of quick disassembly, cleaning and maintenance of the filter screen. This solves the problem of long downtime caused by cumbersome filter screen cleaning and maintenance in the prior art, and the blockage of heat exchange components caused by untimely interception of impurities, thus improving the continuous heat exchange efficiency of the device.

[0018] 2. In this utility model, by pulling the lever, the extrusion column is moved upward, thereby releasing the limiting ball. Since the limiting ball is not locked by the extrusion column, it can slide inside the connecting column and disengage from the limiting groove, thereby achieving the effect of quickly connecting external pipes. This solves the problems of long pipe connection time, poor sealing, low installation efficiency, and heat leakage caused by the prior art, and improves the installation convenience and heat recovery efficiency of the device. Attached Figure Description

[0019] Figure 1 This is a three-dimensional schematic diagram of a corrosion-resistant waste heat recovery device for sewage pipelines proposed in this utility model;

[0020] Figure 2 This is a structural schematic diagram of the inlet pipe of a corrosion-resistant waste heat recovery device for sewage pipelines proposed in this utility model.

[0021] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0022] Figure 4 This is a schematic diagram of the internal structure of the waste heat recovery machine of a corrosion-resistant sewage pipeline waste heat recovery device proposed in this utility model;

[0023] Figure 5 This is an exploded structural diagram of the recovery machine of a corrosion-resistant waste heat recovery device for sewage pipelines proposed in this utility model.

[0024] Figure 6 for Figure 5 Enlarged view of point B in the middle.

[0025] Legend:

[0026] 1. Recycling machine; 2. Outlet pipe; 3. Inlet pipe; 4. Connecting pipe; 5. Filter screen; 6. Connecting shaft; 7. Sliding shaft; 8. Spring 1; 9. Limiting post; 10. Pressing rod; 11. Slot; 12. Connecting ring 1; 13. Connecting ring 2; 14. Sealing ring; 15. Fixing block; 16. Support block; 17. Limiting groove; 18. Connecting post; 19. Limiting ball; 20. Pull rod; 21. Spring 2; 22. Extrusion post; 23. Heat exchange plate. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] Reference Figures 1-4 The present invention provides an embodiment of a corrosion-resistant wastewater pipeline waste heat recovery device, comprising a recovery machine 1, an outlet pipe 2 fixedly connected inside the recovery machine 1, an inlet pipe 3 fixedly connected inside the recovery machine 1, a heat exchange plate 23 inside the recovery machine 1 to help accelerate the transfer and recovery of wastewater heat, and a filter assembly inside the outlet pipe 2 to ensure that the wastewater entering the recovery machine 1 does not contain too many impurities and to avoid blockage.

[0029] The filter assembly includes a filter screen 5, which is slidably connected inside the outlet pipe 2 for easy cleaning and replacement. Symmetrical connecting shafts 6 are fixedly connected to the outer wall of the filter screen 5. These two connecting shafts 6 facilitate the sliding and disassembly of the filter screen 5 within the outlet pipe 2. Symmetrical sliding shafts 7 are slidably connected inside each of the two connecting shafts 6. The sliding shafts 7 slide along the direction of the connecting shafts 6, ensuring the balance and stability of the structure. Limiting posts 9 are fixedly connected to one end of each of the two sliding shafts 7, limiting the sliding range of the filter screen 5. The function is to prevent the filter screen 5 from moving excessively and causing structural failure. Pressing rods 10 are fixedly connected to the outer walls of the two sliding shafts 7. The pressing rods 10 slide inside the connecting shaft 6. Multiple slots 11 are opened inside the water inlet pipe 3. The limiting post 9 engages with the slots 11. Springs 8 are installed inside the two connecting shafts 6. Both ends of the springs 8 are fixedly connected to the side walls of the sliding shafts 7. A connecting pipe 4 is slidably connected to one end of the water inlet pipe 3. A connecting component is provided on the outer wall of the water inlet pipe 3 to facilitate quick installation of the waste heat recovery device by the user.

[0030] Reference Figure 5 and Figure 6The connecting assembly includes a first connecting ring 12 and a second connecting ring 13. Both connecting rings 12 and 13 are slidably connected to the outer wall of the inlet pipe 3. Sealing rings 14 are fixedly connected to the inner walls of both connecting rings 12 and 13. The main function of the sealing rings 14 is to contact the interface between the inlet pipe 3 and the connecting pipe 4 to ensure the sealing of the device and prevent leakage. The sealing rings 14 contact the connection between the inlet pipe 3 and the connecting pipe 4. Symmetrical fixing blocks 15 are fixedly connected to the outer wall of the first connecting ring 12, providing stable support. Symmetrical support blocks 16 are fixedly connected to the outer wall of the second connecting ring 13, providing additional support to the assembly and preventing the pipe from deforming or falling off due to excessive pressure during operation. Each of the 16 has a limiting groove 17 inside. The bottom of each of the two fixing blocks 15 is fixedly connected to a connecting post 18. The two connecting posts 18 are slidably connected to left and right symmetrical limiting balls 19. The limiting balls 19 engage with the limiting groove 17, limiting the movement range of the connecting ring 12 and connecting ring 23 on the water inlet pipe 3, ensuring that the components are stable and not easy to fall off. A pull rod 20 is slidably connected inside the fixing block 15. A spring 21 is sleeved on the outer wall of the pull rod 20. The spring 21 provides elastic support, ensuring that the pull rod 20 can quickly return to its original position under different operating conditions. One end of the spring 21 is fixedly connected to the outer wall of the pull rod 20, and the other end is fixedly connected to the inner wall of the fixing block 15. A pressing post 22 is fixedly connected to the outer wall of the pull rod 20, and the pressing post 22 is in contact with the limiting ball 19.

[0031] Working principle: When using this corrosion-resistant waste heat recovery device for sewage pipes, the device is first installed in the sewage pipe by personnel. Waste heat is recovered through heat exchange fins 23. When sewage enters the recovery machine 1 through the inlet pipe 3, the filter screen 5 can intercept impurities in the sewage, preventing them from entering the recovery machine 1 and affecting the operation of the heat exchange fins 23. When a large number of impurities accumulate on the surface of the filter screen 5 and affect the filtration effect of the filter screen 5, the personnel press the pressing rod 10 to drive the sliding shaft 7 to move the limiting post 9, so that the limiting post 9 disengages from the slot 11 to unlock, thereby facilitating the quick disassembly and assembly of the filter screen 5, timely replacement and cleaning of the filter screen 5, and ensuring the efficiency of the filter screen 5. When the recycling machine 1 needs to be installed by personnel, firstly, the personnel will attach the inlet pipe 3 or outlet pipe 2 to the external pipe, and then pull the lever 20 to drive the lever 20 to slide inside the fixed block 15, thereby driving the squeezing column 22 to move synchronously, squeezing the second spring 21, causing the second spring 21 to undergo elastic deformation and store elastic potential energy. Then, the connecting column 18 is inserted into the support block 16. After insertion, the force of pulling the lever 20 is released, and the elastic restoring force of the second spring 21 pushes the squeezing column 22 to reset. The squeezing of the squeezing column 22 pushes the limiting ball 19 into the limiting groove 17 and restricts the movement of the limiting ball 19, realizing a quick locking connection. The sealing ring 14 can ensure the sealing of the connection.

[0032] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A corrosion-resistant waste heat recovery device for sewage pipelines, comprising a recovery machine (1), characterized in that: The recycling machine (1) is fixedly connected to an outlet pipe (2), the recycling machine (1) is fixedly connected to an inlet pipe (3), the recycling machine (1) is equipped with heat exchange plates (23), and the outlet pipe (2) is equipped with a filter assembly. The filter assembly includes a filter screen (5), which is slidably connected inside the outlet pipe (2). The outer wall of the filter screen (5) is fixedly connected to a left-right symmetrical connecting shaft (6). The two connecting shafts (6) are slidably connected to a top-bottom symmetrical sliding shaft (7). One end of each of the two sliding shafts (7) is fixedly connected to a limiting post (9). The outer wall of each of the two sliding shafts (7) is fixedly connected to a pressing rod (10). The pressing rod (10) slides inside the connecting shaft (6). The inlet pipe (3) has multiple slots (11) inside. The limiting post (9) engages with the slots (11). The two connecting shafts (6) are each provided with a spring (8). Both ends of the spring (8) are fixedly connected to the side wall of the sliding shaft (7). One end of the inlet pipe (3) is slidably connected to a connecting pipe (4). The outer wall of the inlet pipe (3) is provided with a connecting assembly.

2. The corrosion-resistant waste heat recovery device for sewage pipelines according to claim 1, characterized in that: The connecting assembly includes a first connecting ring (12) and a second connecting ring (13), both of which are slidably connected to the outer wall of the water inlet pipe (3).

3. The corrosion-resistant waste heat recovery device for sewage pipelines according to claim 2, characterized in that: Both the inner walls of the first connecting ring (12) and the second connecting ring (13) are fixedly connected with sealing rings (14), and the sealing rings (14) are in contact with the connection between the water inlet pipe (3) and the connecting pipe (4).

4. The corrosion-resistant waste heat recovery device for sewage pipelines according to claim 3, characterized in that: The outer wall of the first connecting ring (12) is fixedly connected with a left-right symmetrical fixing block (15), and the outer wall of the second connecting ring (13) is fixedly connected with a left-right symmetrical support block (16).

5. The corrosion-resistant waste heat recovery device for sewage pipelines according to claim 4, characterized in that: Both of the support blocks (16) have limit grooves (17) inside, and both of the fixing blocks (15) have connecting columns (18) fixedly connected to their bottoms.

6. The corrosion-resistant waste heat recovery device for sewage pipelines according to claim 5, characterized in that: Both of the connecting columns (18) are slidably connected with left and right symmetrical limiting balls (19), and the limiting balls (19) are engaged with the limiting grooves (17).

7. The corrosion-resistant waste heat recovery device for sewage pipelines according to claim 6, characterized in that: The fixing block (15) is slidably connected to a pull rod (20), and a spring (21) is sleeved on the outer wall of the pull rod (20).

8. The corrosion-resistant waste heat recovery device for sewage pipelines according to claim 7, characterized in that: One end of the spring (21) is fixedly connected to the outer wall of the pull rod (20), and the other end is fixedly connected to the inner wall of the fixing block (15). A pressing column (22) is fixedly connected to the outer wall of the pull rod (20), and the pressing column (22) is in contact with the limiting ball (19).

Images