A smoke exhaust system for ablation machine based on PLC

Abstract

The present invention discloses a smoke exhaust system for an ablation machine based on a PLC, comprising a static pressure device connected to the ablation machine and a suction power device connected to the static pressure device via a smoke exhaust pipe; the suction power device adjusts the suction power according to the pressure change in the static pressure chamber of the static pressure device; the static pressure device comprises a dynamic turbulence chamber of a smoke exhaust port connected to the ablation machine, the dynamic turbulence chamber having a dynamic turbulence driver, a dynamic turbulence component of the dynamic turbulence driver extending into the dynamic turbulence chamber, and the dynamic turbulence driver driving the dynamic turbulence component to move to actively stir the smoke guided along the dynamic turbulence chamber, so that the smoke flow in the dynamic turbulence chamber is reduced in speed until it changes from a dynamic pressure state to a static pressure state. The present invention performs an active stirring type dynamic pressure to static pressure conversion on the smoke flow by arranging a dynamic turbulence driver corresponding to the dynamic turbulence chamber, thereby improving the efficiency of converting dynamic pressure to static pressure and greatly reducing dynamic pressure loss. In addition, the smoke exhaust suction power can be adjusted according to the pressure change in the static pressure chamber, thereby improving the smoke exhaust efficiency.

Description

Technical Field

[0001] The invention belongs to the technical field of smoke exhaust for an ablation machine, and in particular relates to a smoke exhaust system for an ablation machine based on a PLC. Background Art

[0002] Smooth smoke exhaust from an ablator improves smoke exhaust efficiency and makes exhaust safer. The static pressure box is a crucial component in the ablator's exhaust system. Installing a static pressure box in an ablator can convert some dynamic pressure into static pressure, reducing dynamic pressure loss and facilitating smoke exhaust. The existing static pressure box structure features an internal lining material, allowing the incoming smoke to flow through the lining material and slow down, converting some dynamic pressure into static pressure. However, this has the disadvantage that, due to the independent circulation of smoke, the portion of dynamic pressure that can be converted is relatively limited, impacting overall exhaust efficiency. Summary of the Invention

[0003] Purpose of the invention: In order to overcome the deficiencies in the prior art, the present invention provides a PLC-based ablation machine smoke exhaust system, which actively stirs the flue gas flow by arranging a dynamic turbulence driver in the corresponding dynamic turbulence chamber to convert the dynamic pressure into static pressure, thereby improving the efficiency of converting dynamic pressure to static pressure and greatly reducing the dynamic pressure loss. In addition, the smoke exhaust suction power can be adjusted by the pressure change in the static pressure chamber to improve the smoke exhaust efficiency.

[0004] Technical Solution: To achieve the above-mentioned objectives, the present invention provides a PLC-based ablation machine smoke exhaust system, comprising a static pressure device connected to the smoke exhaust port of the ablation machine and a static pressure smoke outlet suction power device connected to the static pressure device via a smoke exhaust duct; the suction power device adjusts the suction power according to the pressure change in the static pressure chamber of the static pressure device;

[0005] The static pressure device includes at least one dynamic turbulence chamber connected to the static pressure chamber, and the static pressure device is connected to the smoke exhaust port of the ablation machine through the dynamic pressure smoke inlet of the dynamic turbulence chamber; the dynamic turbulence chamber is correspondingly provided with a dynamic turbulence driver, and the dynamic turbulence component of the dynamic turbulence driver extends into the dynamic turbulence chamber, and the dynamic turbulence driver drives the dynamic turbulence component to move and actively stir the smoke guided along the dynamic turbulence chamber, so that the smoke flow in the dynamic turbulence chamber is reduced in speed until it changes from a dynamic pressure state to a static pressure state.

[0006] Furthermore, the dynamic spoiler driver drives the dynamic spoiler component to rotate, and the rotation speed is adjustable.

[0007] Furthermore, the dynamic turbulence component includes an isolation piston driven by a rotating shaft extending into the dynamic turbulence chamber and a stirring duct arranged in a circumferential array on the isolation piston; the isolation piston divides the dynamic turbulence chamber into a dynamic pressure smoke storage space and a static pressure smoke storage space along the smoke diversion direction; in the dynamic pressure smoke storage space, the shape of the incoming smoke flow is disrupted by the rotating stirring duct, so that the smoke is slowed down and accumulated; the accumulated smoke is introduced into the static pressure smoke storage space along the stirring duct through the high and low pressure difference between the dynamic pressure smoke storage space and the static pressure smoke storage space.

[0008] Furthermore, the stirring duct is filled with a honeycomb flow-blocking filler, and the smoke guided along the stirring duct is subjected to a secondary deceleration due to the flow-blocking effect of the honeycomb flow-blocking filler.

[0009] Furthermore, the air inlet end of the stirring duct has a filler gap that promotes the smoke to enter the stirring duct.

[0010] Furthermore, a compensating fan blade installed on a rotating shaft is provided in the static pressure smoke storage space, and the compensating fan blade is located correspondingly at the air outlet end of the stirring duct.

[0011] Furthermore, the inner wall of the dynamic turbulence chamber and the top wall or all inner walls of the static pressure chamber are paved with a sound-absorbing layer made of sound-absorbing material.

[0012] Furthermore, a high-temperature pressure sensor for measuring pressure is provided in the static pressure chamber.

[0013] Furthermore, the suction power device includes a main induced draft fan and a standby induced draft fan, and the smoke exhaust duct leading out from the static pressure device is divided into a main smoke exhaust duct connected to the main induced draft fan and a standby smoke exhaust duct connected to the standby induced draft fan. A main electric valve is installed on the smoke exhaust duct of the main induced draft fan, and a main electric valve is installed on the smoke exhaust pipe of the standby induced draft fan, and a standby electric valve is installed on the smoke exhaust pipe of the standby induced draft fan; the main induced draft fan and the standby induced draft fan include three states: single open, double open, and double closed.

[0014] Furthermore, a safety fire damper is provided on the smoke exhaust duct.

[0015] Beneficial effects: The PLC-based ablation machine smoke exhaust system of the present invention has the following beneficial effects: the present invention arranges a dynamic turbulence driver corresponding to the dynamic turbulence chamber to perform active turbulent flow conversion of the smoke flow into static pressure, thereby improving the efficiency of converting dynamic pressure to static pressure, greatly reducing dynamic pressure loss, and being able to adjust the smoke exhaust suction power through the pressure change in the static pressure chamber, thereby improving the smoke exhaust efficiency, taking into account the safety of the entire smoke exhaust system in terms of suction power, and is suitable for large-scale promotion and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Attachment Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0017] Attachment Figure 2 It is a structural diagram of the static pressure device;

[0018] Attachment Figure 3 It is a structural schematic diagram of the dynamic turbulence static pressure device. DETAILED DESCRIPTION

[0019] The present invention will be further described below with reference to the accompanying drawings.

[0020] The ablation machine's static pressure box can convert some dynamic pressure into static pressure, reducing dynamic pressure loss and facilitating smoke exhaust. Existing static pressure boxes are constructed with a lining material inside the box. The incoming flue gas automatically passes through the lining material, slowing it down and converting some of the dynamic pressure into static pressure. However, this has the disadvantage that due to the independent flow of flue gas, the conversion of dynamic pressure into static pressure is limited, affecting overall smoke exhaust efficiency.

[0021] It's important to note that the control system employed in this invention is a PLC, and all electrical devices and components involved are connected to the PLC control system. The PLC uses a Siemens S7-200SMART CPU224CN, equipped with an MP277-10 HMI LCD screen for data display. Furthermore, the hardware design details incorporate numerous fuses, thermocouples, and other components to maintain system safety.

[0022] In order to solve the above problems, the technical solution proposed by the present invention is as shown in the attached Figure 1 and attached Figure 2As shown, a PLC-based ablation machine smoke exhaust system includes a static pressure device 2 connected to the smoke exhaust port of the ablation machine 1, and a suction power unit connected to the static pressure smoke outlet 20a of the static pressure device 2 via a smoke exhaust duct 3. The suction power unit adjusts the suction power based on pressure changes within the static pressure chamber 2.2 of the static pressure device 2. A high-temperature pressure sensor 8 for pressure measurement is located within the static pressure chamber 2.2. The suction power unit includes a main induced draft fan 4 and a backup induced draft fan 5. The smoke exhaust duct 3 extending from the static pressure device 2 is divided into a main smoke exhaust duct 3.1 connected to the main induced draft fan 4 and a backup smoke exhaust duct 3.2 connected to the backup induced draft fan 5. A main electric valve 5 is installed on the smoke exhaust duct 3. The main induced draft fan 4 has a main electric valve 4.1 installed on the smoke exhaust duct, and a backup electric valve 5.1 installed on the smoke exhaust duct of the backup induced draft fan 5. The main induced draft fan 4 and the backup induced draft fan 5 have three states: single open, double open, and double closed. In order to further improve safety, a safety fire damper 6 is also provided on the smoke exhaust duct 3. Under normal circumstances, the main induced draft fan 4 is started and is in single-open mode. When the high-temperature pressure sensor 8 detects that the pressure exceeds the safety threshold, the backup induced draft fan 5 is also started, which is in double-open mode. In the event of a safety accident such as a fire, both the main induced draft fan 4 and the backup induced draft fan 5 are shut down, which is in double-closed mode. If the main induced draft fan 4 fails, the backup induced draft fan 5 is switched to single-open mode. If the pressure in the static pressure chamber 2.2 is too high, there will be a safety hazard. By adjusting the suction power, the safety of the entire smoke exhaust system can be taken into account in terms of suction power. Among them, the power of the induced draft fan is 5.5KW, and a voltage of 380V is required. Three electric valves, each of which is 100W, require a voltage of 220V. The control voltage generally uses DC below 24V, so a rectifier device of 220V to 24V is required. The two fans use 380V AC power, which needs to be converted into 220V AC power, and then converted into 24V by a rectifier to power the CPU.

[0023] The present invention also includes an A / D temperature acquisition system for collecting flue gas temperature. The key aspect of this A / D temperature acquisition system is the processing of temperature data. The temperature signal's timing cycle originates from the PLC itself, while the A / D signal is converted into a digital signal primarily through linear changes. The A / D temperature acquisition system primarily implements control within temperature thresholds, requiring a separate I / O to output appropriate signals. When the temperature exceeds the temperature warning setpoint, an audible and visual alarm is activated, with a specific PLC I / O output signal implementing the audible and visual control. When the temperature exceeds the high-temperature alarm setpoint, the ablation machine's power-off I / O pin is controlled.

[0024] As attached Figure 2 and attached Figure 3As shown, the static pressure device 2 includes at least one dynamic turbulence chamber 2.1 connected to the static pressure chamber 2.2, and the static pressure device 2 is connected to the smoke exhaust port of the ablation machine 1 through the dynamic pressure smoke inlet 20a of the dynamic turbulence chamber 2.1; the dynamic turbulence chamber 2.1 is correspondingly provided with a dynamic turbulence driver 2.3, and the dynamic turbulence component 31 of the dynamic turbulence driver 2.3 extends into the dynamic turbulence chamber 2.1. The dynamic turbulence driver 2.3 drives the dynamic turbulence component 31 to move and actively stir the smoke guided along the dynamic turbulence chamber 2.1, so that the smoke flow in the dynamic turbulence chamber 2.1 is reduced in speed until it changes from a dynamic pressure state to a static pressure state. The present invention arranges a dynamic turbulence driver 2.3 corresponding to the dynamic turbulence chamber 2.1 to perform active turbulence conversion on the flue gas flow to static pressure. Unlike the existing static pressure box, it changes the autonomous passive guidance of the flue gas through the lining material to the active turbulence of the flue gas through the dynamic turbulence component 31, which can convert more dynamic pressure flue gas into static pressure flue gas, reduce dynamic pressure loss, improve the efficiency of converting dynamic pressure to static pressure, make the flue gas discharge of the ablation machine 1 more uniform and smooth, and increase the safety of smoke exhaust.

[0025] It should be noted that in the present invention, as a preference, the dynamic spoiler driver 2.3 drives the dynamic spoiler component 31 to move in a rotational manner. The rotational manner has a better effect on the turbulence and deceleration of the flue gas. It can directly destroy the flue gas flow pattern and realize the conversion of flue gas dynamic pressure into static pressure. The rotational speed is adjustable and the rotation speed is adjusted autonomously according to the flue gas displacement. For example, if the flue gas displacement of the ablation machine is large, the rotation speed should be appropriately increased.

[0026] As attached Figure 2 As shown, the dynamic turbulence assembly 31 includes an isolation piston 312 driven by a rotating shaft 311 extending into the dynamic turbulence chamber 2.1, and stirring ducts 313 arranged in a circumferential array on the isolation piston 312. The rotating shaft 311 is connected to the rotary drive device 32. The isolation piston 312 separates the dynamic turbulence chamber 2.1 into a dynamic pressure flue gas storage space 11 and a static pressure flue gas storage space 12 along the flue gas flow direction. Within the dynamic pressure flue gas storage space 11, the rotating stirring duct 313 disrupts the flow of incoming flue gas, causing the flue gas to slow down and accumulate. The accumulated flue gas is directed along the stirring duct 313 into the static pressure flue gas storage space 12 due to the high and low pressure difference between the dynamic pressure flue gas storage space 11 and the static pressure flue gas storage space 12. The stirring duct 313 is composed of a tubular body installed through the isolation piston 312.

[0027] After the flue gas is stirred and decelerated, in order to further reduce the flue gas flow rate, the stirring duct 313 is filled with a honeycomb flow-blocking filler 314. The flue gas guided along the stirring duct 313 is subjected to a secondary deceleration due to the flow-blocking effect of the honeycomb flow-blocking filler 314. After the secondary deceleration, the flue gas velocity drops even lower, and the effect of converting dynamic pressure into static pressure is further significantly improved.

[0028] In order to make it easier for the flue gas that has broken the airflow form and accumulated in the dynamic pressure flue gas accumulation space 11 to enter the stirring duct 313, and to avoid excessive accumulation of flue gas causing excessive pressure to create safety hazards and affect the static pressure effect, the air inlet end of the stirring duct 313 has a filler gap 316 that promotes the flue gas to enter the stirring duct 313. The existence of the filler gap 316 allows the flue gas to accumulate at the entrance of the stirring duct 313, and the flue gas is more easily diverted and flows through the honeycomb flow-blocking filler 314.

[0029] Due to the effect of secondary deceleration, the flue gas may flow too slowly when it is guided through the honeycomb flow-blocking filler 314 in the stirring duct 313, which will affect the smoke exhaust rate. In order to optimize and compensate for this aspect, a compensating fan blade 315 installed on the rotating shaft 311 is provided in the static pressure flue gas accumulation space 12. The compensating fan blade 315 corresponds to the air outlet end of the stirring duct 313. When the compensating fan blade 315 is driven to rotate by the rotating shaft 311, a small low-pressure area will be formed at the outlet of the stirring duct 313, thereby appropriately compensating and increasing the flow rate of the flue gas flowing through the honeycomb flow-blocking filler 314 in the stirring duct 313.

[0030] In order to reduce noise and improve quietness, the inner wall of the dynamic turbulence chamber 2.1 and the top wall or the entire inner wall of the static pressure chamber 2.2 are paved with a sound-absorbing layer 7 made of sound-absorbing material.

[0031] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A PLC-based ablation machine smoke exhaust system, characterized by: The invention comprises a static pressure device (2) connected to the smoke exhaust port of the ablation machine (1) and a suction power device connected to the static pressure smoke outlet (20b) of the static pressure device (2) via a smoke exhaust pipe (3); the suction power device adjusts the suction power according to the pressure change in the static pressure chamber (2.2) of the static pressure device (2); The static pressure device (2) comprises at least one dynamic turbulence chamber (2.1) connected to the static pressure chamber (2.2); the static pressure device (2) is connected to the smoke exhaust port of the ablation machine (1) through the dynamic pressure smoke inlet (20a) of the dynamic turbulence chamber (2.1); the dynamic turbulence chamber (2.1) corresponds to a dynamic turbulence driver (2.3); a dynamic turbulence component (31) of the dynamic turbulence driver (2.3) extends into the dynamic turbulence chamber (2.1); the dynamic turbulence driver (2.3) drives the dynamic turbulence component (31) to move and actively turbulent the smoke guided along the dynamic turbulence chamber (2.1), so that the smoke flow in the dynamic turbulence chamber (2.1) is decelerated until it changes from a dynamic pressure state to a static pressure state; The dynamic spoiler driver (2.3) drives the dynamic spoiler component (31) to rotate, and the rotation speed is adjustable; The dynamic turbulence component (31) comprises an isolation piston (312) driven by a rotating shaft (311) extending into the dynamic turbulence chamber (2.1) and a stirring duct (313) arranged in a circumferential array on the isolation piston (312); the isolation piston (312) separates the dynamic turbulence chamber (2.1) into a dynamic pressure smoke accumulation space (11) and a static pressure smoke accumulation space (12) along the smoke guide direction; in the dynamic pressure smoke accumulation space (11), the shape of the incoming smoke flow is disrupted by the rotating stirring duct (313), so that the smoke is decelerated and accumulated; the accumulated smoke is introduced into the static pressure smoke accumulation space (12) along the stirring duct (313) through the high and low pressure difference between the dynamic pressure smoke accumulation space (11) and the static pressure smoke accumulation space (12).

2. The PLC-based ablation machine smoke exhaust system according to claim 1, characterized in that: The stirring duct (313) is filled with a honeycomb flow-blocking filler (314), and the smoke guided along the stirring duct (313) is subjected to a secondary deceleration due to the flow-blocking effect of the honeycomb flow-blocking filler (314).

3. The PLC-based ablation machine smoke exhaust system according to claim 2, characterized in that: The air inlet end of the stirring duct (313) has a filler gap (316) for promoting the entry of smoke into the stirring duct (313).

4. The PLC-based ablation machine smoke exhaust system according to claim 2, characterized in that: A compensating fan blade (315) mounted on a rotating shaft (311) is provided in the static pressure smoke storage space (12), and the compensating fan blade (315) is located corresponding to the gas outlet end of the stirring duct (313).

5. The PLC-based ablation machine smoke exhaust system according to claim 4, characterized in that: The inner wall of the dynamic turbulence chamber (2.1) and the top wall or all inner walls of the static pressure chamber (2.2) are paved with a sound-absorbing layer (7) made of sound-absorbing material.

6. The PLC-based ablation machine smoke exhaust system according to claim 5, characterized in that: A high-temperature pressure sensor (8) for measuring pressure is provided in the static pressure chamber (2.2).

7. The PLC-based ablation machine smoke exhaust system according to claim 1, characterized in that: The suction power device comprises a main induced draft fan (4) and a standby induced draft fan (5); the smoke exhaust duct (3) drawn from the static pressure device (2) is divided into a main smoke exhaust duct (3.1) connected to the main induced draft fan (4) and a standby smoke exhaust duct (3.2) connected to the standby induced draft fan (5); a main electric valve (9) is installed on the smoke exhaust duct (3); a main electric valve (4.1) is installed on the smoke exhaust duct of the main induced draft fan (4); and a standby electric valve (5.1) is installed on the smoke exhaust duct of the standby induced draft fan (5); the main induced draft fan (4) and the standby induced draft fan (5) have three states: single open, double open, and double closed.

8. The PLC-based ablation machine smoke exhaust system according to claim 7, characterized in that: The smoke exhaust pipe (3) is also provided with a safety fire damper (6).

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