Online rotary descaling nozzle assembly for shell and tube heat exchangers

Abstract

This utility model provides an online rotary descaling nozzle assembly for shell-and-tube heat exchangers, relating to the field of descaling nozzles. It includes a spray cover and an inlet cylinder. A pressure cylinder is screwed onto the outer side of the inlet cylinder, a tension spring is welded to the top of the inlet cylinder, a shielding shell is welded to the outer side of the inlet cylinder, and a telescopic cylinder is slidably connected to the inner side of the inlet cylinder. A ring plate is welded to the bottom end of the telescopic cylinder, a rotating cylinder is rotatably connected to the inner side of the telescopic cylinder, a propeller plate is welded to the inner side of the rotating cylinder, and a guide plate is welded to the inner side of the telescopic cylinder. A rotating cylinder is welded to the bottom end of the spray cover. The arrangement of the spray cover, tension spring, telescopic cylinder, and rotating cylinder avoids the problem of traditional nozzles being easily clogged by external scale due to exposed nozzles, ensuring that the nozzle assembly can smoothly advance inward along the tube bundle. This solves the problems of traditional rotary descaling nozzles where the head position cannot break through scale blockages in the tube bundle and the exposed nozzle structure being easily clogged by external scale.

Description

Technical Field

[0001] This utility model belongs to the field of descaling nozzles, and more specifically, it relates to an online rotary descaling nozzle assembly for shell-and-tube heat exchangers. Background Technology

[0002] A tubular heat exchanger is an indirect heat exchanger that uses the wall of a tube bundle within a closed shell as the heat transfer surface. Its core principle is to allow two fluids at different temperatures to flow between the tube side and the shell side through the space formed by the tube bundle and shell, using the tube wall as an intermediate heat transfer medium to achieve heat transfer from the high-temperature fluid to the low-temperature fluid. Currently, to ensure the heat transfer efficiency of the tube bundle wall, a high-pressure water pump and hose are typically used to inject high-pressure water into a rotating descaling nozzle. This allows the nozzle to spray a high-pressure water jet to remove scale and impurities from the tube bundle wall. However, in actual use, scale buildup often causes blockage in the tube bundle. The nozzle head cannot break through the scale blockage, preventing the nozzle from advancing further into the tube bundle for cleaning. Furthermore, the nozzle structure is relatively exposed, making it impossible to seal the nozzle after cleaning, resulting in easy clogging by external dirt and other contaminants. Utility Model Content

[0003] To address the aforementioned technical problems, this utility model provides an online rotary descaling nozzle assembly for shell-and-tube heat exchangers. This solves the problems that traditional rotary descaling nozzles cannot remove scale blockages from the tube bundle at the nozzle head position, and that the exposed nozzle structure of the rotary descaling nozzle is easily clogged by external sludge.

[0004] This utility model provides an online rotating descaling nozzle assembly for a shell-and-tube heat exchanger, including a spray cover and a water inlet cylinder; a pressure cylinder is screwed onto the outer side of the water inlet cylinder, a tension spring is welded to the top of the water inlet cylinder, a shielding shell is welded to the outer side of the water inlet cylinder, a telescopic cylinder is slidably connected to the inner side of the water inlet cylinder, a sealing ring is bonded to the outer side of the telescopic cylinder, the outer side of the water inlet cylinder has a threaded structure, and the bottom end of the water inlet cylinder has a stepped structure; a ring plate is welded to the bottom end of the telescopic cylinder, a rotating cylinder is rotatably connected to the inner side of the telescopic cylinder, a turbine plate is welded to the inner side of the rotating cylinder, and a guide plate is welded to the inner side of the telescopic cylinder; a rotating cylinder is welded to the bottom end of the spray cover.

[0005] Furthermore, the top of the spray cover is a conical structure, and the top of the conical spray cover is provided with four sets of breaking plates. The breaking plates are arranged in a ring array around the vertical central axis of the spray cover. The outer side of the spray cover is provided with four sets of internal and external through spray holes, which are arranged in a ring array around the vertical central axis of the spray cover.

[0006] Furthermore, a telescopic cylinder is welded to the top of the tension spring, and a water inlet cylinder is welded to the bottom of the tension spring.

[0007] Furthermore, the turboprop plates are in six groups, each group of which is a rectangular plate structure. The turboprop plates are arranged in a circular array around the vertical central axis of the rotating cylinder at a 15-degree inclination.

[0008] Furthermore, the guide vane has a cross-shaped frame structure, and the cross-shaped frame structure of the guide vane is opposite to the six sets of turboprop plates.

[0009] Furthermore, the pressure cylinder is a cylindrical structure with an opening on the upper side. The inner side of the cylindrical cylinder of the pressure cylinder is provided with a threaded structure. The inner side of the pressure cylinder is threadedly connected to the threaded structure on the outer side of the water inlet cylinder. A through hole is provided at the center of the bottom of the pressure cylinder. The bottom of the inner side of the pressure cylinder is a stepped structure.

[0010] Compared with the prior art, the present invention has the following beneficial effects:

[0011] 1. In this utility model, on the one hand, the conical structure at the top of the spray cap and the four sets of ring-shaped crushing plates can rotate, cut and crush the scale blockage in the tube bundle when rotating at high speed, ensuring that the nozzle assembly can smoothly advance inward along the tube bundle, thoroughly covering the cleaning area and avoiding cleaning dead corners caused by blockage. On the other hand, with the help of the elastic force of the tension spring, when the high-pressure water flow stops, the telescopic cylinder drives the rotating cylinder and the spray cap to move downward, so that the spray hole of the spray cap automatically retracts into the shielding shell, effectively avoiding the situation where the traditional nozzle nozzle is exposed and easily blocked by external dirt, reducing the maintenance cost when the nozzle is idle, and ensuring smooth spraying when used next.

[0012] 2. In this utility model, six sets of turboprop plates and a cross-plate frame structure of guide plates are used in conjunction with each other. The directional diversion of the guide plates makes the fluid impact the turboprop plates more precise and reduces lateral force loss. The tilting design of the turboprop plates efficiently converts the fluid kinetic energy into rotational power, which drives the spray cover to rotate at high speed and stably. The high-pressure water jet of the rotating spray can form an all-round, dead-angle-free flush on the inner wall of the tube bundle, which greatly improves the descaling efficiency and cleanliness. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model.

[0014] Figure 2 This is a front view structural diagram of this utility model.

[0015] Figure 3 This is a schematic diagram of the structure of this utility model from a bottom view.

[0016] Figure 4 This is a bottom view of the structure of this utility model.

[0017] Figure 5This is a front view cross-sectional structural diagram of this utility model.

[0018] Figure 6 This is a cross-sectional structural diagram of the present invention.

[0019] Reference numerals: 1. Shielding shell; 2. Spray cover; 3. Turbine plate; 4. Tension spring; 5. Rotary drum; 6. Sealing ring; 7. Telescopic cylinder; 8. Guide plate; 9. Ring plate; 10. Pressure cylinder; 11. Water inlet cylinder; 12. Crushing plate. Detailed Implementation

[0020] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0021] like Figures 1-6 As shown, this utility model provides an online rotating descaling nozzle assembly for a shell-and-tube heat exchanger, including a spray cover 2 and an inlet cylinder 11; a pressure cylinder 10 is screwed onto the outer side of the inlet cylinder 11, a tension spring 4 is welded to the top of the inlet cylinder 11, a shielding shell 1 is welded to the outer side of the inlet cylinder 11, a telescopic cylinder 7 is slidably connected to the inner side of the inlet cylinder 11, a sealing ring 6 is bonded to the outer side of the telescopic cylinder 7, the outer side of the inlet cylinder 11 has a threaded structure, and the bottom end of the inlet cylinder 11 has a stepped structure; a ring plate 9 is welded to the bottom end of the telescopic cylinder 7, a rotating cylinder 5 is rotatably connected to the inner side of the telescopic cylinder 7, a turbine plate 3 is welded to the inner side of the rotating cylinder 5, and a guide plate 8 is welded to the inner side of the telescopic cylinder 7; the rotating cylinder 5 is welded to the bottom end of the spray cover 2.

[0022] In this embodiment of the present invention, the top of the spray cover 2 is a conical structure. The top of the cone of the spray cover 2 is provided with four sets of crushing plates 12. The crushing plates 12 are arranged in a ring array around the vertical central axis of the spray cover 2. The outer side of the spray cover 2 is provided with four sets of internal and external through spray holes. The spray holes are arranged in a ring array around the vertical central axis of the spray cover 2. During the high-speed rotation of the spray cover 2, the four sets of crushing plates 12 of the top conical structure are driven to rotate synchronously. The crushing plates 12 rotate and cut and crush the scale blockage block inside the tube bundle, ensuring that the rotating descaling nozzle assembly can be smoothly advanced in the heat exchanger tube bundle.

[0023] In this embodiment of the utility model, a telescopic cylinder 7 is welded to the top of the tension spring 4, and a water inlet cylinder 11 is welded to the bottom of the tension spring 4. When the high-pressure water flow in the water inlet cylinder 11 stops, the tension spring 4 pulls the telescopic cylinder 7 downward through its own elastic force. The telescopic cylinder 7 drives the rotating cylinder 5 connected to the inner side to move downward. The rotating cylinder 5 then drives the spray cover 2 welded to the upper side to move downward synchronously, so that the spray hole on the outer side of the spray cover 2 automatically retracts downward into the shielding shell 1 to shield and prevent dirt from falling into the spray hole of the spray cover 2 and causing blockage.

[0024] In this embodiment of the utility model, there are six groups of turboprop plates 3. Each group of turboprop plates 3 is a rectangular plate structure. The turboprop plates 3 are arranged in a circular array around the vertical central axis of the rotating cylinder 5 at a 15-degree inclination. When the high-pressure water body of the inlet cylinder 11 rushes into the rotating cylinder 5 and impacts the six groups of turboprop plates 3, the turboprop plates 3 drive the rotating cylinder 5 to rotate at high speed inside the telescopic cylinder 7, so that the rotating cylinder 5 drives the spray cover 2 welded to the top to rotate at high speed synchronously. The high-pressure water jet sprayed out by the spray cover 2 performs rotary high-pressure descaling and cleaning on the inner wall of the heat exchanger tube bundle.

[0025] In this embodiment of the utility model, the guide plate 8 is a cross-plate frame structure. The cross-plate frame structure of the guide plate 8 is opposite to the six sets of turboprop plates 3, so that the flow stream formed by the guide plate 8 of the cross-plate frame is opposite to the turboprop plates 3. This allows the blades of each set of turboprop plates 3 to regularly receive the fluid impact after the flow is guided, avoiding rotational jamming or speed fluctuations caused by uneven force. In addition, the directional flow of fluid can minimize the lateral impact force on the turboprop plates 3, allowing more fluid kinetic energy to be converted into the rotational kinetic energy of the turboprop plates 3, improving the rotational efficiency of the spray cover 2, and thus enhancing the descaling operation capability of the nozzle assembly.

[0026] In this embodiment of the utility model, the pressure cylinder 10 is a cylindrical cylinder structure with an open upper side. The inner side of the cylindrical cylinder of the pressure cylinder 10 is provided with a threaded structure. The inner side of the pressure cylinder 10 is threadedly engaged with the threaded structure on the outer side of the water inlet cylinder 11. A through hole is provided at the center of the bottom of the pressure cylinder 10. The bottom of the inner side of the pressure cylinder 10 is a stepped structure. When the pressure cylinder 10 is tightened at the threaded structure on the outer side of the water inlet cylinder 11, the stepped structure of the pressure cylinder 10, together with the stepped structure on the outer side of the water inlet cylinder 11, squeezes the opening of the external water supply hose. No complicated tools are required. The tightening and loosening of the opening of the external water supply hose and the water inlet cylinder 11 can be completed by manually rotating the pressure cylinder 10. The disassembly and assembly of the water supply hose and the nozzle assembly are simple and efficient. In addition, the stepped structure forms a multi-segment, stepped, tight compression of the opening of the water supply hose, effectively preventing fluid leakage from the connection gap.

[0027] Specific usage and function of this utility model embodiment:

[0028] In this invention, when removing scale from the heat exchanger tube bundle, the external water pipe is first inserted into the central through hole of the pressure cylinder 10. Then, the external water pipe is fitted onto the stepped structure at the bottom of the inlet cylinder 11. The pressure cylinder 10 is then manually rotated. Because the inner thread of the pressure cylinder 10 is engaged with the outer thread of the inlet cylinder 11, the stepped structure at the bottom of the inner side of the pressure cylinder 10, together with the stepped structure at the bottom of the inlet cylinder 11, presses the external water pipe tightly against the pipe, thus completing the installation of the external water pipe and the nozzle assembly. Then, the external high-pressure water pump injects water into the inlet cylinder 11 through the water delivery hose. The high-pressure water impacts the ring plate 9 at the bottom of the telescopic cylinder 7, causing the telescopic cylinder 7 to move the spray cover 2, which is welded to the top of the rotating cylinder 5, upward. The spray holes on the outer side of the spray cover 2 extend to the shield. At the top of the shield 1, the high-pressure water body is directed and cut by the guide plate 8 and then rushes towards the propeller plate 3. At this time, the propeller plate 3 drives the rotating cylinder 5 to rotate at high speed inside the telescopic cylinder 7. The spray cover 2 welded to the top of the rotating cylinder 5 rotates synchronously. The spray hole of the spray cover 2 sprays out a high-pressure water jet to clean the inner wall of the tube bundle. The crushing plate 12 at the top of the spray cover 2 crushes the scale blockage in the tube bundle to ensure the smooth advancement of the nozzle assembly. After the cleaning is completed, the external high-pressure water pump stops injecting water into the water inlet cylinder 11. At this time, the tension spring 4 pulls the rotating cylinder 5 connected to the inner side of the telescopic cylinder 7 downward through its own elastic force. The spray cover 2 welded to the top of the rotating cylinder 5 retracts into the shield 1. The shield 1 seals the spray hole on the outer side of the spray cover 2 to prevent the spray hole from being blocked by dirt.

[0029] All the above components are installed, connected, or set up using common mechanical methods, such as welding, threaded connections, and screw connections. Furthermore, the specific structure, model, and coefficient specifications of all components are based on their own technologies, and any method that achieves the desired effect can be implemented. The sealing rings 6 used above are common commercially available components; upon purchase and use, simply follow the instruction manual provided with the purchase, and therefore will not be elaborated upon further.

[0030] The technical solution of this utility model is not limited to the scope of the embodiments of this utility model. All technical contents not described in detail in this utility model are known technologies.

Claims

1. An online rotary descaling nozzle assembly for a shell-and-tube heat exchanger, characterized in that: It includes a spray cover (2) and a water inlet cylinder (11); a pressure cylinder (10) is screwed onto the outer side of the water inlet cylinder (11), a tension spring (4) is welded to the top of the water inlet cylinder (11), a shielding shell (1) is welded onto the outer side of the water inlet cylinder (11), a telescopic cylinder (7) is slidably connected to the inner side of the water inlet cylinder (11), a sealing ring (6) is bonded to the outer side of the telescopic cylinder (7), the outer side of the water inlet cylinder (11) is provided with a threaded structure, and the bottom end of the water inlet cylinder (11) is a stepped structure; a ring plate (9) is welded to the bottom end of the telescopic cylinder (7), a rotating cylinder (5) is rotatably connected to the inner side of the telescopic cylinder (7), a turbo propeller plate (3) is welded to the inner side of the rotating cylinder (5), and a guide plate (8) is welded to the inner side of the telescopic cylinder (7); a rotating cylinder (5) is welded to the bottom end of the spray cover (2).

2. The online rotary descaling nozzle assembly for a shell-and-tube heat exchanger as described in claim 1, characterized in that: The top of the spray cover (2) is a cone structure. The top of the cone of the spray cover (2) is provided with four sets of breaking plates (12). The breaking plates (12) are arranged in a ring array around the vertical central axis of the spray cover (2). The outer side of the spray cover (2) is provided with four sets of internal and external through spray holes. The spray holes are arranged in a ring array around the vertical central axis of the spray cover (2).

3. The online rotary descaling nozzle assembly for a shell-and-tube heat exchanger as described in claim 1, characterized in that: The top end of the tension spring (4) is welded with a telescopic cylinder (7), and the bottom end of the tension spring (4) is welded with a water inlet cylinder (11).

4. The online rotary descaling nozzle assembly for a shell-and-tube heat exchanger as described in claim 1, characterized in that: The turboprop (3) consists of six groups, each group of which is a rectangular plate structure. The turboprop (3) is arranged in a ring array around the vertical central axis of the rotating cylinder (5) at a 15-degree inclination.

5. The online rotary descaling nozzle assembly for a shell-and-tube heat exchanger as described in claim 1, characterized in that: The guide plate (8) is a cross plate frame structure, and the cross plate frame structure of the guide plate (8) is opposite to the six sets of turboprop plates (3).

6. The online rotary descaling nozzle assembly for a shell-and-tube heat exchanger as described in claim 1, characterized in that: The pressure cylinder (10) is a cylindrical cylinder structure with an opening on the upper side. The inner side of the cylindrical cylinder of the pressure cylinder (10) is provided with a threaded structure. The inner side of the pressure cylinder (10) is threadedly connected to the threaded structure on the outer side of the water inlet cylinder (11). The center of the bottom of the pressure cylinder (10) is provided with a through hole. The bottom of the inner side of the pressure cylinder (10) is a stepped structure.

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