Low-speed engine exhaust gas cooling control box based on flow sensing

Abstract

This invention relates to an electrical control box for low-speed engine exhaust gas cooling based on flow sensing. The control box includes a housing and a door. The housing has a through hole, through which two concentric, spaced pipes are fixedly installed. A flow monitoring module is rotatably mounted between the two pipes, one of which introduces a portion of the exhaust gas into the monitoring module. The flow monitoring module includes: a heat-conducting pipe, with its two ends fixedly connected to the two pipes respectively; a telescopic module fixedly disposed within the heat-conducting pipe; a baffle plate disposed on the telescopic module; and a measurement module. This invention utilizes a purely mechanical and potentiometer-based structure to achieve exhaust gas flow sensing, without relying on easily contaminated traditional electronic flow sensors. When the main flow sensor fails, the flow monitoring module of this invention can directly output control signals to control actuators such as electric regulating valves and variable frequency pumps, ensuring the exhaust gas cooling system continues to operate and significantly improving system robustness.

Description

Technical Field

[0001] This invention belongs to the technical field of waste gas treatment equipment, specifically relating to a low-speed exhaust gas cooling electrical control box based on flow sensing. Background Technology

[0002] In equipment using low-speed engines, such as ships and large generator sets, the exhaust gas cooling system is a key component to ensure stable engine operation and meet emission regulations. The electrical control box, as the core of the exhaust gas cooling system, integrates numerous electronic components (such as controllers, frequency converters, and relays) and has high requirements for the temperature and humidity of the operating environment.

[0003] However, in practical applications (such as maritime navigation and low-temperature winter environments), electrical control boxes often face the following problems: 1. Low-temperature condensation risk: When the internal temperature of the electrical control box is below the dew point temperature under long-term low-temperature and high-humidity conditions, condensation easily forms on the surface of the circuit boards and metal components inside the box, leading to short circuits, corrosion, or decreased insulation performance, seriously affecting system reliability. 2. Flow sensor failure risk: Exhaust gas cooling systems typically rely on independent electronic flow sensors to obtain exhaust gas flow data for closed-loop control. However, exhaust gas contains a large amount of soot, tar, and acidic substances, which can easily cause contamination of the flow sensor probe, accuracy drift, or even complete failure. Once the sensor fails, the system will lose key input parameters and will be unable to perform targeted cooling control, potentially causing the exhaust gas temperature to exceed the standard or energy consumption to increase.

[0004] Therefore, there is an urgent need to design an electrical control box structure that can reliably sense based on exhaust gas flow, simultaneously utilize exhaust gas heat to improve its own working environment, and has redundant control capabilities. Summary of the Invention

[0005] The purpose of this invention is to provide a low-speed engine exhaust gas cooling electrical control box based on flow sensing in order to solve the problems mentioned in the background art.

[0006] The present invention achieves the above objectives through the following technical solutions: The low-speed engine exhaust gas cooling electrical control box based on flow sensing includes a box body and a box door. The box body is provided with a through hole, and two concentric pipes with a gap are fixed at the through hole. A flow monitoring module is rotatably installed between the two pipes for sensing the flow of exhaust gas. One of the pipes is used to introduce part of the exhaust gas into the monitoring module. The traffic monitoring module includes: A heat-conducting pipe, with its two ends fixedly connected to the two pipes respectively, and the heat-conducting pipe is made of heat-conducting material, is used to conduct heat in the exhaust gas to the inside of the box; The telescopic module is fixedly installed inside the heat pipe; A wind deflector is mounted on the telescopic module and is displaced by the exhaust gas flow. A measurement module, located inside the heat pipe, is used to detect the displacement of the baffle and output an electrical signal.

[0007] Preferably, the telescopic module includes: The mounting plate is fixedly installed inside the heat pipe; Several guide rods are fixedly mounted on the mounting plate; Several sleeves are movably fitted onto the guide rod, and the end of the sleeve away from the guide rod is connected to the wind deflector; A return spring, located inside the sleeve, is used to provide a return force.

[0008] Preferably, the measurement module includes a linear sliding potentiometer fixedly mounted on the mounting plate, the linear sliding potentiometer including a housing and a slider; The wind deflector is equipped with a push rod, which is fixedly connected to the slide handle and is used to drive the slide handle to make linear reciprocating motion on the housing, thereby outputting different voltages.

[0009] Preferably, a rotary switch is fixedly provided on the slide handle, the rotary switch includes a base and a knob, and a coil spring is provided between the knob and the base; A panel is fixedly installed on the knob to withstand wind resistance and drive the knob to rotate.

[0010] Preferably, it also includes a temperature control component: A temperature sensor, located inside the enclosure, is used to detect the temperature inside the enclosure; The first telescopic component is fixedly installed on the box body; A foldable heat shield, one end of which is fixed to one of the pipes, and the other end of which is connected to the telescopic end of the first telescopic component, is used to unfold by the first telescopic component when the temperature inside the box exceeds a threshold, so as to shield the heat-conducting pipe.

[0011] Preferably, a second telescopic component is fixedly provided on the heat-conducting pipe, and the telescopic end of the second telescopic component is located inside the heat-conducting pipe; The telescopic end of the second telescopic component is fixedly equipped with a cleaning component for cleaning the wind deflector.

[0012] Preferably, the cleaning component includes a first arc-shaped block and a second arc-shaped block. The end of the first arc-shaped block is fixedly provided with a friction strip, and the second arc-shaped block is used to clean the surface of the windshield.

[0013] Preferably, the windbreak is disc-shaped, with a guide protrusion on its windward side and an arc-shaped sidewall that is to be cleaned. A bracket is provided between the sleeve and the wind deflector. The sleeve is fixedly connected to the bracket, and the bracket is rotatably connected to the wind deflector, so that the wind deflector can rotate relative to the sleeve under the drive of the friction strip.

[0014] Preferably, the telescopic end of the second telescopic component is also fixedly provided with a scraper for cleaning the panel surface.

[0015] Preferably, a ratchet mechanism is provided between the wind deflector and the bracket to ensure that the wind deflector rotates in one direction relative to the bracket.

[0016] The beneficial effects of this invention are as follows: This invention utilizes a purely mechanical and potentiometer-based structure to achieve exhaust gas flow sensing, without relying on traditional electronic flow sensors that are susceptible to contamination. When the main flow sensor fails, the flow monitoring module of this invention can directly output control signals to control actuators such as electric regulating valves and variable frequency pumps, ensuring the exhaust gas cooling system continues to operate and significantly improving system robustness.

[0017] This invention solves the problem of condensation on electronic components in low-temperature and high-humidity environments by setting up heat pipes to conduct some of the heat in the exhaust gas to the inside of the electrical control box, thereby actively increasing the temperature inside the box and disrupting the conditions for condensation formation.

[0018] This invention, through the cooperation of the second telescopic component and the cleaning component, combined with the rotatable design of the wind deflector, can periodically or as needed remove carbon soot and tar adhering to the surface of the wind deflector, ensuring the long-term accuracy of flow sensing and the flexibility of the telescopic module's movement. Simultaneously, a high-temperature resistant rubber bellows cover protects the moving parts, further extending the maintenance cycle and service life.

[0019] The linear sliding potentiometer in this invention provides the main flow signal, while the rotary switch can provide fine-tuning or threshold trigger signals under low-speed airflow. The combination of the two can achieve precise and graded control of the exhaust gas cooling system. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a partial cross-sectional view of the flow monitoring module in this invention; Figure 3 yes Figure 2 Another perspective illustration; Figure 4 yes Figure 3 Enlarged view of point A in the middle; Figure 5 This is an exploded view of the present invention; Figure 6 This is a schematic diagram illustrating the working principle of the present invention.

[0021] In the diagram: 1. Box body; 2. Box door; 3. Through hole; 4. Pipe; 5. Heat pipe; 6. Baffle plate; 7. Mounting plate; 8. Guide rod; 9. Sleeve; 10. Return spring; 11. Housing; 12. Slide handle; 13. Push rod; 14. Base; 15. Knob; 16. Coil spring; 17. Panel; 18. No. 1 telescopic component; 19. Folding heat insulation cover; 20. No. 2 telescopic component; 21. No. 1 arc block; 22. No. 2 arc block; 23. Protrusion; 24. Bracket. Detailed Implementation

[0022] The present application will now be described in further detail. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0023] Example 1

[0024] like Figure 1-6 As shown, the low-speed engine exhaust gas cooling electrical control box based on flow sensing includes a box body 1 and a door 2. The box body 1 has a horizontal through hole 3, which is located at the bottom of the box body 1 and penetrates through the two side walls of the box body 1. Concentric and spaced pipes 4 are fixed at the two through holes 3 respectively. A flow monitoring module is rotatably installed between the two pipes 4 to sense the flow rate of the exhaust gas. One of the pipes 4 is used to introduce a portion of the exhaust gas into the monitoring module.

[0025] The flow monitoring module includes a heat-conducting pipe 5 fixedly connected to both pipes 4, a telescopic module fixedly installed inside the heat-conducting pipe 5, a baffle plate 6 installed on the telescopic module, and a measuring module installed inside the heat-conducting pipe 5. The heat-conducting pipe 5 is used to conduct heat from the exhaust gas into the housing 1.

[0026] It should be noted that a delivery pipe is installed between pipe 4 and the exhaust gas pipe 4 of the low-speed machine. This delivery pipe and pipe 4 are used to introduce a portion of the exhaust gas into the heat-conducting pipe 5. As the exhaust gas passes through the heat-conducting pipe 5, it passes over the baffle plate 6. The exhaust gas exerts a compressive force on the baffle plate 6, causing it to tend to move. The wind force acting on the baffle plate 6 causes the telescopic module to shorten, thus allowing the measuring module to detect the displacement of the baffle plate 6. The displacement of the baffle plate 6 is used to indirectly measure the flow velocity of the exhaust gas, thereby obtaining the exhaust gas flow rate data. The measuring module directly controls the exhaust gas cooling system, controlling the electric regulating valve, variable frequency pump, fan, solenoid valve, etc., to regulate the temperature of the exhaust gas.

[0027] Meanwhile, the heat in the exhaust gas exchanges heat with the air inside the chamber 1 after passing through the heat pipe 5, causing the temperature inside the chamber 1 to rise. In a long-term low-temperature environment, the temperature inside the chamber 1 rises, disrupting the condensation conditions and reducing the risk of condensation.

[0028] In this embodiment, the flow monitoring module can be used as a redundant design of the electrical control box to perform targeted processing when the flow sensor fails, based on the actual exhaust gas flow rate.

[0029] Specifically, the telescopic module includes a mounting plate 7 fixed inside the heat pipe 5, several guide rods 8 fixed on the mounting plate 7, a sleeve 9 movably sleeved on the guide rods 8, and a return spring 10 inside the sleeve 9.

[0030] The end of the sleeve 9 furthest from the guide rod 8 is connected to the wind deflector 6.

[0031] It should be noted that the baffle 6 moves under the impetus of the exhaust gas, which simultaneously drives the sleeve 9 to move on the guide rod 8. During the movement of the sleeve 9, the guide rod 8 enters the interior of the sleeve 9, and the guide rod 8 compresses the return spring 10. When the exhaust gas flow decreases, the return spring 10 compresses the guide rod 8, causing the sleeve 9 to move in the opposite direction relative to the guide rod 8, and the baffle 6 returns to its initial position.

[0032] The surface of the guide rod 8 is smoothed and coated with lubricating oil to reduce friction during the movement of the sleeve 9 relative to the guide rod 8. Meanwhile, the wind deflector 6 is made of a low-density material to reduce its weight, allowing it to move under the influence of the return spring 10 without causing significant torsional stress on the guide rod 8.

[0033] Preferably, the measurement module includes a linear sliding potentiometer (in the prior art, a component that continuously changes the resistance value or output voltage by linear movement of the slider 12) fixed on the mounting plate 7. The linear sliding potentiometer includes a housing 11 and a slider 12.

[0034] The wind deflector 6 is provided with a push rod 13, which is fixedly connected to the slide handle 12 and is used to drive the slide handle 12 to make linear reciprocating motion on the housing 11, thereby outputting different voltages.

[0035] It should be noted that when the baffle plate 6 moves, it drives the push rod 13 to move, and the push rod 13 drives the slide handle 12 to move on the housing 11. The slide handle 12 can output different signal values ​​at different positions relative to the housing 11, thereby enabling direct control of the exhaust gas cooling system.

[0036] The greater the flow rate of the exhaust gas, the greater the moving distance of the baffle plate 6, the stronger the signal output by the linear sliding potentiometer, and the more powerful the exhaust gas cooling system can treat the exhaust gas.

[0037] Example 2

[0038] Based on Embodiment 1, a rotary switch (such as a fan or speaker switch) is fixedly provided on the slider 12 in this embodiment. The rotary switch includes a base 14 and a knob 15, and a coil spring 16 is provided between the knob 15 and the base 14.

[0039] A panel 17 is fixedly provided on the knob 15 to withstand wind resistance and drive the knob 15 to rotate.

[0040] It should be noted that when the airflow velocity is below a certain threshold, the spring force is greater than the airflow thrust, causing the baffle plate 6 to remain stationary, resulting in no signal from the measurement module. This embodiment incorporates a rotary switch and a panel 17 within the exhaust gas flow channel, allowing the exhaust gas to act on the panel 17, causing it to rotate. The panel 17 drives the knob 15 to rotate, and the rotary switch outputs an electrical signal to control the exhaust gas cooling system.

[0041] As knob 15 rotates, the coil spring 16 contracts. When the exhaust gas flow changes, the coil spring 16 adaptively adjusts knob 15, thereby outputting the correct electrical signal. The adjustment range of the rotary switch is smaller than that of the linear sliding potentiometer, belonging to fine-tuning. When the linear sliding potentiometer is engaged, the adjustment of the rotary switch ceases to have any effect.

[0042] Example 3

[0043] Based on Embodiment 2, in this embodiment, the box 1 is provided with a telescopic component 18. The telescopic end of the telescopic component 18 (preferably, the telescopic component adopts an electric push rod 13, the same below) is fixed with a foldable heat insulation cover. One end of the heat insulation cover is fixed on one of the pipes 4. The heat insulation cover is used to cover the heat conduction pipe 5.

[0044] It should be noted that if the chamber 1 continues to heat up during the heat exchange process of the heat pipe 5, the temperature of the chamber 1 will become too high, which may easily damage the components. A temperature gauge is installed inside the chamber 1. When the temperature of the chamber 1 rises to a threshold, the first telescopic component 18 moves the heat insulation cover along the heat pipe 5. The heat insulation cover is made of heat insulation material, which can prevent heat exchange between the heat pipe 5 and the air inside the chamber 1, thereby controlling the temperature inside the chamber 1 and preventing it from becoming too high.

[0045] Example 4

[0046] Based on Example 2, in this example, a second telescopic component 20 is fixedly provided on the heat pipe 5, and the telescopic end of the second telescopic component 20 is located inside the heat pipe 5.

[0047] The telescopic end of the second telescopic component 20 is fixedly provided with a cleaning component for cleaning the wind deflector 6. The preferred cleaning component includes a first arc-shaped block 21 and a second arc-shaped block 22 with elasticity. The end of the first arc-shaped block 21 is fixedly provided with a friction strip, and the second arc-shaped block 22 is used to clean the surface of the wind deflector 6.

[0048] A bracket 24 is also provided between the sleeve 9 and the wind deflector 6. The sleeve 9 and the push rod 13 are both fixedly connected to the bracket 24. The bracket 24 is rotatably connected to the wind deflector 6, that is, the wind deflector 6 can rotate relative to the sleeve 9.

[0049] The telescopic end of the second telescopic component 20 is also fixedly equipped with a scraper for cleaning the surface of the panel 17.

[0050] It should be noted that because the exhaust gas contains carbon soot and tar, which will adhere to the surface of the baffle plate 6, the weight of the baffle plate 6 will increase, thereby changing the exhaust gas flow data measured by the measurement module.

[0051] During cleaning, the second telescopic component 20 moves the first arc-shaped block 21 and the second arc-shaped block 22 closer to the wind deflector 6. The wind deflector 6 is disc-shaped, and a protrusion 23 is provided in the direction of upstream of the exhaust gas. The protrusion 23 can effectively reduce the amount of attached substances, and the attached substances are easy to accumulate on the arc-shaped sidewall of the disc.

[0052] When the first arc-shaped block 21 contacts the wind deflector 6, it drives the wind deflector 6 to rotate via the friction strip. As the first arc-shaped block 21 and the second arc-shaped block 22 move downwards, they deform. At this time, the second arc-shaped block 22 cleans the arc-shaped sidewall of the wind deflector 6, scraping off the attached material. As the telescopic end of the second telescopic component 20 repeatedly moves up and down, driving the cleaning component to move, a thorough cleaning of the arc-shaped sidewall of the wind deflector 6 can be achieved.

[0053] In this embodiment, to ensure measurement accuracy, high-temperature resistant rubber bellows are fitted over the sleeve 9, guide rod 8, linear sliding potentiometer, and rotary switch for protection. This prevents carbon soot and tar from entering the gap between the sleeve 9 and guide rod 8, allowing each relative motion to maintain long-term use.

[0054] To ensure that the baffle plate 6 does not rotate when the first arc block 21 moves upward, a ratchet mechanism is provided between the bracket 24 and the baffle plate 6 (in the prior art, this ensures that the baffle plate 6 rotates in one direction relative to the bracket 24).

[0055] The embodiments described above are merely examples of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.

Claims

1. A low-speed engine exhaust gas cooling electrical control box based on flow sensing, comprising a box body (1) and a box door (2), characterized in that, The box (1) is provided with a through hole (3), and two concentric pipes (4) with a gap are fixedly provided at the through hole (3). A flow monitoring module is rotatably installed between the two pipes (4) to sense the flow of exhaust gas. One of the pipes (4) is used to introduce part of the exhaust gas into the monitoring module. The traffic monitoring module includes: A heat-conducting pipe (5) is fixedly connected to two pipes (4) at both ends, and the heat-conducting pipe (5) is made of heat-conducting material to conduct heat in the exhaust gas to the inside of the box (1); The telescopic module is fixedly installed inside the heat pipe (5); A wind deflector (6) is provided on the telescopic module and is displaced under the push of the exhaust gas flow; The measurement module is located inside the heat pipe (5) and is used to detect the displacement of the baffle plate (6) and output an electrical signal.

2. The low-speed engine exhaust gas cooling electrical control box based on flow sensing according to claim 1, characterized in that, The telescopic module includes: Mounting plate (7) is fixedly installed inside the heat pipe (5); Several guide rods (8) are fixedly mounted on the mounting plate (7); Several sleeves (9) are movably sleeved on the guide rod (8), and the end of the sleeve (9) away from the guide rod (8) is connected to the wind baffle (6); A reset spring (10) is provided inside the sleeve (9) to provide a reset force.

3. The low-speed engine exhaust gas cooling electrical control box based on flow sensing according to claim 1, characterized in that, The measurement module includes a linear sliding potentiometer fixed on the mounting plate (7), and the linear sliding potentiometer includes a housing (11) and a slider (12). The wind deflector (6) is provided with a push rod (13), which is fixedly connected to the slide handle (12) and is used to drive the slide handle (12) to make linear reciprocating motion on the housing (11) so as to output different voltages.

4. The low-speed engine exhaust gas cooling electrical control box based on flow sensing according to claim 3, characterized in that, A rotary switch is fixedly provided on the slide handle (12). The rotary switch includes a base (14) and a knob (15). A coil spring (16) is provided between the knob (15) and the base (14). A panel (17) is fixedly provided on the knob (15) to withstand wind resistance and drive the knob (15) to rotate.

5. The low-speed engine exhaust gas cooling electrical control box based on flow sensing according to claim 1, characterized in that, It also includes temperature control components: A temperature sensor is installed inside the enclosure (1) to detect the temperature inside the enclosure; The first telescopic component (18) is fixedly installed on the box body (1); A foldable heat shield (19) is fixed at one end to one of the pipes (4) and connected at the other end to the telescopic end of the first telescopic component (18). It is used to be opened by the first telescopic component (18) when the temperature inside the box exceeds the threshold, so as to cover the heat-conducting pipe (5).

6. The low-speed engine exhaust gas cooling electrical control box based on flow sensing according to claim 4, characterized in that, The heat pipe (5) is fixedly provided with a second telescopic component (20), and the telescopic end of the second telescopic component (20) is located inside the heat pipe (5); The telescopic end of the second telescopic component (20) is fixedly provided with a cleaning component for cleaning the wind deflector (6).

7. The low-speed engine exhaust gas cooling electrical control box based on flow sensing according to claim 6, characterized in that, The cleaning components include a first arc-shaped block (21) and a second arc-shaped block (22). The end of the first arc-shaped block (21) is fixed with a friction strip, and the second arc-shaped block (22) is used to clean the surface of the windshield (6).

8. The low-speed engine exhaust gas cooling electrical control box based on flow sensing according to claim 7, characterized in that, The wind deflector (6) is disc-shaped, with a guide protrusion (23) on its windward side and its arc-shaped sidewall is the surface to be cleaned; A bracket (24) is provided between the sleeve (9) and the wind deflector (6). The sleeve (9) is fixedly connected to the bracket (24), and the bracket (24) is rotatably connected to the wind deflector (6), so that the wind deflector (6) can rotate relative to the sleeve (9) under the drive of the friction strip.

9. The low-speed engine exhaust gas cooling electrical control box based on flow sensing according to claim 8, characterized in that, The telescopic end of the second telescopic component (20) is also fixedly provided with a scraper for cleaning the surface of the panel (17).

10. The low-speed engine exhaust gas cooling electrical control box based on flow sensing according to claim 8, characterized in that, A ratchet mechanism is provided between the wind deflector (6) and the bracket (24) to ensure that the wind deflector (6) rotates in one direction relative to the bracket (24).

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