An integrated pulse-vibration cleaning heat exchanger and method

Abstract

This invention provides an integrated pulse vibration cleaning heat exchanger and method. The invention utilizes a pulse backwash assembly, driven by a motor to create a reciprocating mechanism, generating pressure pulses within the pulse tank. Cleaning agent is drawn in through a water injection pipe and injected into the tank as intermittent high-pressure water flow via a three-way pipe, generating a strong impact force to peel away stubborn dirt from the inner wall of the pipes. This solves the problem of insufficient impact from traditional steady-state reverse cleaning water flow, improving dirt removal efficiency. Simultaneously, the first output shaft of the drive motor is connected to the reciprocating mechanism within the pulse tank, and the second output shaft is connected to the vibration mechanism within the fixed housing. This single drive source synchronously drives pulse generation and vibration generation, ensuring that the impact frequency of the pulsed water flow is synchronized with the frequency of the mechanical vibration. The highly compact structure significantly saves installation space and reduces manufacturing costs. Furthermore, the precise matching of pulse and vibration due to the shared drive source enhances the cleaning effect and greatly improves cleaning efficiency.

Description

Technical Field

[0001] This invention relates to the field of heat exchanger technology, and in particular to an integrated pulse vibration cleaning heat exchanger and method. Background Technology

[0002] A heat exchanger is a device that transfers heat between fluids at different temperatures. Heat exchange is achieved through solid walls or direct contact, and it is widely used in industrial production, energy and power, refrigeration and air conditioning, and chemical industries. Common types include shell-and-tube, plate, spiral, and heat pipe types. Its core functions are heat recovery, temperature control, and process optimization, playing a vital role in improving energy efficiency, reducing energy consumption, and minimizing environmental pollution. In traditional heat exchangers, dirt easily accumulates on the inner walls of the fluid channels during long-term operation, leading to a decrease in heat transfer efficiency. Conventional backwashing methods use steady-state reverse flow cleaning, but due to insufficient water flow impact force and constant direction, it is difficult to effectively remove the firmly attached dirt layer. Frequent shutdowns for disassembly and cleaning are required, affecting continuous operation of the equipment and making it unsuitable for use. On the other hand, the solution of using pulsed water flow and mechanical vibration for cleaning requires two independent drive and control systems, resulting in bulky equipment, high costs, and difficulty in precisely synchronizing the pulse and vibration actions, thus limiting the synergistic effect.

[0003] In view of this, the inventor has specifically designed an integrated pulse vibration cleaning heat exchanger and method, which leads to this invention. Summary of the Invention

[0004] To solve the above problems, the technical solution of the present invention is as follows: An integrated pulse vibration cleaning heat exchanger includes a tank, heat exchange tubes disposed inside the tank, and a cleaning assembly. Water supply hoods are fixedly connected to both sides of the tank. Both ends of the heat exchange tubes are respectively connected to the two water supply hoods. The cleaning assembly is disposed above the side wall of the tank and includes: The pulse backwash assembly includes a pulse tank and a reciprocating mechanism disposed therein. One end of the pulse tank is connected to a three-way pipe, and a water injection pipe is provided on the side of the pulse tank near the three-way pipe. The two ends of the three-way pipe away from the pulse tank are respectively connected to the inside of the tank body and the water supply hood. The vibration assembly includes a fixed shell, which is fixedly connected to the end of the pulse tank away from the three-way pipe. The inner wall of the fixed shell is provided with a vibration mechanism for generating vibration, and a conduction plate is fixedly connected between the outer side wall of the fixed shell and the tank body. A drive motor is located inside a fixed housing. The drive motor has a first output shaft and a second output shaft on both ends. The first output shaft passes through a pulse tank and is connected to a reciprocating mechanism to periodically compress the fluid in the pulse tank. The second output shaft is connected to a vibration mechanism to generate mechanical vibration.

[0005] Preferably, the reciprocating mechanism includes a turntable, a reciprocating piston, and a return spring arranged sequentially along the length of the pulse tank. The turntable is connected to the first output shaft. A limiting rod is provided on the side of the pulse tank away from the drive motor. The limiting rod is inserted into the pulse tank. The piston and the return spring are connected to the limiting rod. The turntable and the piston are both provided with periodically pressable protrusions on opposite sides. The turntable, piston, return spring, and limiting rod are all coaxially arranged.

[0006] Preferably, the side surface of the turntable is provided with a plurality of positioning slides, and the inner wall of the pulse tank is provided with positioning blocks that cooperate with the positioning slides.

[0007] Preferably, the vibration mechanism includes a vibrating steel plate, which is fixed to the inner wall of the fixed housing. A rotating striking frame is fixed on the second output shaft. The rotating striking frame is provided with a plurality of striking strips evenly distributed along the circumference. The ends of the plurality of striking strips are provided with striking blocks that strike the vibrating steel plate.

[0008] Preferably, both the water injection pipe and the tee pipe are equipped with one-way valves.

[0009] Preferably, the two outlets of the three-way pipe are respectively connected to the inside of the tank and the water supply cover.

[0010] Preferably, a stabilizing plate is provided at the bottom of the tank, and the top two sides of the stabilizing plate are fixedly connected to the tank by columns, and the bottom of the stabilizing plate is provided with mounting holes.

[0011] Preferably, the present invention also provides a cleaning method for an integrated pulse vibration cleaning heat exchanger, comprising the following steps: When the drive motor is started, its output simultaneously drives the reciprocating mechanism and the vibration mechanism to rotate, providing power for pulse cleaning and vibration cleaning. The first output shaft of the drive motor drives the reciprocating mechanism to periodically compress the fluid in the pulse tank, creating pressure pulses inside the pulse tank; When the pressure inside the pulse tank decreases, the water injection pipe is opened, and the cleaning agent is drawn into the pulse tank through the water injection pipe. When the pressure inside the pulse tank increases, the three-way pipe opens, and the cleaning agent is injected into the water supply hood and the water outlet pipe of the tank through the three-way pipe, forming an intermittent high-pressure pulse water flow. The second output shaft of the drive motor synchronously starts the vibration assembly, and the vibration is transmitted to the tank through the transmission plate; The waste liquid containing dirt generated during cleaning is discharged from the bottom of the tank, completing one pulse backwash process. The above steps are repeated according to cleaning needs until the expected cleaning effect is achieved.

[0012] The technical solution provided by this invention has the following beneficial effects: This invention utilizes a pulse backwash assembly. A drive motor powers a reciprocating mechanism, generating pressure pulses within the pulse tank. Cleaning agent is drawn in through the water injection pipe and injected into the tank as intermittent high-pressure water flow via a three-way pipe. This generates a strong impact force that peels away stubborn dirt from the inner wall of the pipes, solving the problem of insufficient impact from traditional steady-state backwashing water flow and improving dirt removal efficiency. A single drive motor with outputs at both ends connects the first output shaft to the reciprocating mechanism within the pulse tank and the second output shaft to a vibration mechanism within a fixed housing. This single drive source synchronously drives pulse generation and vibration. This ensures that the impact frequency of the pulsed water flow is synchronized with the frequency of the mechanical vibration. The highly compact structure significantly saves installation space and reduces manufacturing costs. Furthermore, the precise matching of pulses and vibrations due to the shared drive source enhances the cleaning effect and greatly improves cleaning efficiency. Attached Figure Description

[0013] The accompanying drawings, which are provided to further illustrate the invention and constitute a part of this invention, are illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention.

[0014] in: Figure 1 A perspective view of a heat exchanger for fluid pulse backwashing; Figure 2 A side view of a heat exchanger for fluid pulse backwashing; Figure 3 A cross-sectional view of the tank in a heat exchanger for fluid pulse backwashing; Figure 4 A cross-sectional view of the stationary shell in a heat exchanger for fluid pulse backwashing; Figure 5 This is a cross-sectional view of the pulse tank in a heat exchanger for fluid pulse backwashing.

[0015] Label Explanation: In the diagram: 1. Tank; 2. Water supply cover; 3. Heat exchange tube; 4. Pulse backwash assembly; 41. Pulse tank; 42. Drive motor; 43. Reciprocating mechanism; 44. Water injection pipe; 45. T-connector; 46. Check valve; 5. Vibration assembly; 51. Fixed shell; 52. Vibrating steel plate; 53. Impact block; 54. Conducting plate; 431. Turntable; 432. Piston; 433. Protrusion; 434. Return spring; 6. Stabilizing plate. Detailed Implementation

[0016] To make the technical problems, solutions, and beneficial effects of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of the invention.

[0017] Example 1 Please see Figure 1-5 This invention relates to a fluid pulse backwashing heat exchanger, comprising a tank 1, a pulse backwashing assembly 4, and a vibration assembly 5. Water supply covers 2 are fixedly connected to both sides of the tank 1. A heat exchange tube 3 is provided inside the tank 1. The pulse backwashing assembly 4 includes a pulse tank 41, the bottom of which is fixedly connected to the tank 1. A drive motor 42 is fixedly connected to the inside of the pulse tank 41 near the inlet of the tank 1. A first output shaft is provided on the side of the drive motor 42 away from the inlet of the tank 1, extending to the outside of the pulse tank 41. A reciprocating mechanism 43 is fixedly connected to the first output shaft. A three-way pipe 45 connects to the right side of the pulse tank 41. A water injection pipe 44 is connected to the top of one side of the three-way pipe 45. One-way valves 46 are installed on the surfaces of both the water injection pipe 44 and the three-way pipe 45. The two ends of the three-way pipe 45 away from the pulse tank 41 are connected to the interior of the tank body 1 and the water supply cover 2, respectively. The vibration component 5 includes a fixed shell 51. The right side of the fixed shell 51 is fixedly connected to the pulse tank 41. A vibrating steel plate 52 is fixedly connected to the inner wall of the fixed shell 51. A second output shaft is provided on the side of the drive motor 42 near the inlet of the tank body 1. The second output shaft is coaxial with the first output shaft and a striking block 53 is fixedly connected to the second output shaft. Conducting plates 54 are fixedly connected between the front and rear sides of the fixed shell 51 and the tank body 1.

[0018] Specifically: the water supply cover 2 can transport water into the tank 1 and heat exchange tube 3; the pulse tank 41 can cooperate with the reciprocating mechanism 43 to spray the cleaning agent into the tank 1 and heat exchange tube 3 in a pulse form; the water injection pipe 44 facilitates the injection of cleaning agent into the pulse tank 41; the three-way pipe 45 can deliver the cleaning agent to the heat exchange tube 3 and the tank 1 respectively; the one-way valve 46 can prevent the cleaning agent from flowing back; the fixed shell 51 facilitates the installation of the vibrating steel plate 52; when the drive motor 42 is started, the output end of the drive motor 42 simultaneously drives the reciprocating mechanism 43 and the vibrating steel plate 52. The mechanism rotates to provide power for pulse cleaning and vibration cleaning; the first output shaft of the drive motor 42 drives the reciprocating mechanism 43 to periodically compress the fluid in the pulse tank 41, forming pressure pulses inside the pulse tank 41; the second output shaft of the drive motor 42 synchronously starts the vibration component, and the vibration is transmitted to the tank 1 through the transmission plate 54. The striking block 53 can cooperate with the second output shaft of the drive motor 42 to continuously strike the vibrating steel plate 52, causing it to generate high-frequency vibration. The vibration is transmitted to the inside of the tank 1 through the transmission plate 54 to improve the cleaning effect of dirt.

[0019] Example 2 Please see Figure 1-5 Based on Embodiment 1, the reciprocating mechanism 43 includes a turntable 431. The left side of the turntable 431 is fixedly connected to the output end of the drive motor 42. A piston 432 is provided on the right side of the turntable 431. At least one protrusion 433 is eccentrically fixed on the side of the turntable 431 facing the piston 432, and a corresponding protrusion 433 is also fixed on the side of the piston 432 facing the turntable 431. When the turntable 431 rotates, the two protrusions 433 periodically press against each other, pushing the piston 432 to move away from the turntable 431. A return spring 434 is fixedly connected to the right side of the piston 432. A limit rod is fixed to the end of the pulse tank 41 away from the drive motor 42. The limit rod is inserted into the pulse tank 41 and extends axially. Both the piston 432 and the return spring 434 are fitted with... The piston 432 is slidably connected to the limiting rod, and the right side of the limiting rod is fixedly connected to the limiting plate. The left side of the limiting rod passes through the pulse tank 41 and is fixedly connected to the piston 432. The surface of the turntable 431 is provided with a positioning slide. The top and bottom of the positioning slide are slidably connected with positioning blocks. The opposite sides of the two positioning blocks are fixedly connected to the inner wall of the pulse tank 41. The left side of the striking block 53 is movably connected to the inner wall of the fixed shell 51 through a bearing. The transmission plate 54 makes the fixed shell 51 and the tank 1 rigidly connected. The left side of the bottom of the tank 1 is connected to a water supply pipe. A flange is installed at the bottom of the water supply pipe. A stabilizing plate 6 is provided at the bottom of the tank 1. The top two sides of the stabilizing plate 6 are fixedly connected to the tank 1 through columns. The bottom of the stabilizing plate 6 is provided with mounting holes.

[0020] Specifically: the turntable 431 can cooperate with the drive motor 42 to control the rotation of the protrusions 433, causing the two sets of protrusions 433 to press against each other to control the movement of the piston 432. Through the cooperation of the protrusions 433 and the return spring 434, the piston 432 continuously reciprocates. The pressure generated by the reciprocating movement of the piston 432 delivers the cleaning agent into the three-way pipe 45. The limiting rod and the limiting plate can limit the piston 432, allowing it to move smoothly left and right and preventing it from deviating during movement. The positioning slide and the positioning block are used for rotation. The disc 431 is positioned to ensure smooth rotation and prevent wobbling during rotation. The bearing increases the stability of the striking block 53 during rotation, preventing it from being affected by vibration when striking the vibrating steel plate 52. The rigid connection between the fixed shell 51 and the tank 1 via the transmission plate 54 improves the vibration transmission effect. The water supply pipe is used to discharge water from inside the tank 1. The flange allows the water supply pipe to be connected to the pipeline. The stabilizing plate 6 and the column provide stable support for the tank 1. The mounting holes are used for the installation and fixing of the stabilizing plate 6.

[0021] The working principle of this invention is as follows: When the drive motor 42 is energized, the first output shaft and the second output shaft simultaneously drive the right reciprocating mechanism 43 and the left striking block 53 to rotate. The first output shaft drives the turntable 431 to rotate. The protrusions 433 on the surface of the turntable 431 periodically contact and press with the protrusions 433 on the piston 432. With the rebound action of the return spring 434, the piston 432 reciprocates within the pulse tank 41. When the piston 432 moves to the left, the pressure inside the pulse tank 41 decreases, and the one-way valve 46 controls the water injection pipe 44 to draw in cleaning agent. When the piston 432 moves to the right, the pressure decreases. The cleaning agent is injected into the water supply cover 2 and tank 1 through the three-way pipe 45, forming a pulsed water flow that impacts the dirt on the inner wall of the heat exchange tube 3. At the same time, the second output shaft drives the striking block 53 to rotate. The striking block 53 is supported by bearings and rotates smoothly in the fixed shell 51. It periodically impacts the vibrating steel plate 52 to generate high-frequency vibration. The vibration is rigidly transmitted to the tank 1 through the conduction plate 54, causing the tank 1 and the heat exchange tube 3 to vibrate as a whole. This helps to loosen stubborn dirt, solves the problem of poor cleaning effect caused by the strong adhesion of dirt layer, enhances the stability of continuous operation of the equipment, and extends the service life of the heat exchanger.

[0022] Example 3 Based on the apparatus of Embodiments 1 and 2 above, the present invention also proposes a method of use, which includes the following steps: The drive system is started, and the drive motor 42 in the pulse backwash assembly 4 is turned on. The output end of the drive motor 42 begins to operate stably. The first output shaft and the second output shaft synchronously drive the reciprocating mechanism 43 and the left-side striking block 53 to rotate, respectively. Among them, the turntable 431 of the reciprocating mechanism 43 rotates smoothly under the limiting action of the positioning slide and the positioning block, ensuring the stability of the subsequent pulse generation process; the striking block 53 is supported by the bearings on the inner wall of the fixed shell 51, providing a continuous power source for vibration cleaning.

[0023] The generated pulse pressure drives the motor 42 to rotate the turntable 431 continuously. The protrusions 433 on the surface of the turntable 431 rotate with it, periodically contacting and pressing against the protrusions 433 on the surface of the piston 432. When the two sets of protrusions 433 interact, the piston 432 moves to the right against the force of the return spring 434; when the protrusions 433 disengage, the rebound force of the return spring 434 pushes the piston 432 back to the left. Through this reciprocating motion, periodically changing pressure pulses are generated inside the pulse tank 41.

[0024] As the piston 432 moves to the left, the internal space of the pulse tank 41 increases and the pressure decreases. At this time, the one-way valve 46 on the surface of the water injection pipe 44 automatically opens, and external cleaning agents, such as special descaling agents or clean water, are drawn into the pulse tank 41 through the water injection pipe 44, serving as a reserve medium for subsequent cleaning. During this process, the one-way valve 46 on the surface of the three-way pipe 45 remains closed to prevent the drawn-in cleaning agent from flowing back.

[0025] The cleaning medium is injected in a pulsed manner. When the piston 432 moves to the right, the internal space of the pulse tank 41 shrinks, the pressure rises sharply, the one-way valve 46 on the surface of the water injection pipe 44 closes, and the one-way valve 46 on the surface of the three-way pipe 45 opens. The cleaning agent under high pressure is divided into two paths through the three-way pipe 45: one path is injected into the outlet pipe of the tank 1, and the other path is injected into the water supply hood 2. Finally, it enters the heat exchange tube 3 and the interior of the tank 1 in the form of intermittent high-pressure pulse water flow.

[0026] The impact of the water flow strips away the dirt. The pulsed water flow entering the heat exchange tube 3 and tank 1, with its instantaneous high pressure and intermittent impact characteristics, generates a strong impact force on stubborn dirt such as scale and deposits adhering to the inner wall of the pipe and the inside of the tank. This impact force is much greater than the water flow intensity of traditional steady-state reverse cleaning, which can effectively break the adhesion between the dirt and the pipe wall, causing most of the dirt to peel off from the surface.

[0027] Vibration assists in loosening dirt. While the drive motor 42 drives the reciprocating mechanism 43, the striking block 53 rotates synchronously. Supported by bearings, the striking block 53 rotates smoothly, periodically impacting the vibrating steel plate 52 inside the fixed housing 51, causing the vibrating steel plate 52 to generate high-frequency mechanical vibration. The vibration frequency is coordinated with the impact rhythm of the pulsed water flow, enhancing the effect on stubborn dirt.

[0028] Vibration transmission enhances cleaning; the high-frequency vibration generated by the vibrating steel plate 52 is transmitted to the tank 1 through the transmission plate 54. The tank 1 and the internal heat exchange tube 3 resonate accordingly, further loosening deep-seated dirt that is difficult to remove by water flow alone, achieving synergistic cleaning of pulsed water flow impact and high-frequency vibration loosening, and greatly improving dirt removal efficiency.

[0029] The cleaning waste liquid is discharged after the dirt loosened by the pulsed water flow and high-frequency vibration mixes with the cleaning medium to form waste liquid, which is discharged from the equipment through the water supply pipe at the bottom of tank 1, completing one complete pulse backwashing process. For thorough cleaning, the above steps can be repeated multiple times until there is no obvious dirt residue in the discharged waste liquid.

[0030] The present invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvements made using the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution of the present invention to other occasions without modification, are all within the protection scope of the present invention.

Claims

1. An integrated pulse vibration cleaning heat exchanger, comprising a tank, heat exchange tubes disposed inside the tank, and a cleaning assembly, wherein water supply hoods are fixedly connected to both sides of the tank, and both ends of the heat exchange tubes are respectively connected to the two water supply hoods, characterized in that, The cleaning assembly is located above the side wall of the tank, and the cleaning assembly includes: The pulse backwash assembly includes a pulse tank and a reciprocating mechanism disposed therein. One end of the pulse tank is connected to a three-way pipe, and a water injection pipe is provided on the side of the pulse tank near the three-way pipe. The two ends of the three-way pipe away from the pulse tank are respectively connected to the inside of the tank body and the water supply hood. The vibration assembly includes a fixed shell, which is fixedly connected to the end of the pulse tank away from the three-way pipe. The inner wall of the fixed shell is provided with a vibration mechanism for generating vibration, and a conduction plate is fixedly connected between the outer side wall of the fixed shell and the tank body. A drive motor is located inside a fixed housing. The drive motor has a first output shaft and a second output shaft on both ends. The first output shaft passes through a pulse tank and is connected to a reciprocating mechanism to periodically compress the fluid in the pulse tank. The second output shaft is connected to a vibration mechanism to generate mechanical vibration.

2. The integrated pulse vibration cleaning heat exchanger according to claim 1, characterized in that, The reciprocating mechanism includes a turntable, a reciprocating piston, and a return spring arranged sequentially along the length of the pulse tank. The turntable is connected to the first output shaft. A limiting rod is provided on the side of the pulse tank away from the drive motor. The limiting rod is inserted into the pulse tank. The piston and the return spring are connected to the limiting rod. The turntable and the piston are both provided with periodically pressable protrusions on opposite sides. The turntable, piston, return spring, and limiting rod are all coaxially arranged.

3. The integrated pulse vibration cleaning heat exchanger according to claim 1, characterized in that, The turntable has several positioning slides on its side surface, and the pulse tank has positioning blocks on its inner wall that cooperate with the positioning slides.

4. The integrated pulse vibration cleaning heat exchanger according to claim 1, characterized in that, The vibration mechanism includes a vibrating steel plate, which is fixed to the inner wall of the fixed shell. A rotating striking frame is fixed on the second output shaft. The rotating striking frame is provided with a plurality of striking strips evenly distributed along the circumference. The ends of the plurality of striking strips are provided with striking blocks that strike the vibrating steel plate.

5. The integrated pulse vibration cleaning heat exchanger according to claim 2, characterized in that, Both the water injection pipe and the tee pipe are equipped with one-way valves.

6. The integrated pulse vibration cleaning heat exchanger according to claim 5, characterized in that, The two outlets of the three-way pipe are respectively connected to the inside of the tank and the water supply cover.

7. The integrated pulse vibration cleaning heat exchanger according to claim 1, characterized in that, The bottom of the tank is provided with a stabilizing plate, and the top two sides of the stabilizing plate are fixedly connected to the tank by columns. The bottom of the stabilizing plate is provided with mounting holes.

8. A cleaning method for an integrated pulse vibration cleaning heat exchanger based on any one of claims 1-7, characterized in that, Includes the following steps: When the drive motor is started, its output simultaneously drives the reciprocating mechanism and the vibration mechanism to rotate, providing power for pulse cleaning and vibration cleaning. The first output shaft of the drive motor drives the reciprocating mechanism to periodically compress the fluid inside the pulse tank, creating pressure pulses inside the pulse tank; When the pressure inside the pulse tank decreases, the water injection pipe is opened, and the cleaning agent is drawn into the pulse tank through the water injection pipe. When the pressure inside the pulse tank increases, the three-way pipe opens, and the cleaning agent is injected into the water supply hood and the water outlet pipe of the tank through the three-way pipe, forming an intermittent high-pressure pulse water flow. The second output shaft of the drive motor synchronously starts the vibration assembly, and the vibration is transmitted to the tank through the transmission plate; The waste liquid containing dirt generated during cleaning is discharged from the bottom of the tank, completing one pulse backwash process. The above steps are repeated according to cleaning needs until the expected cleaning effect is achieved.

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