Drilling tool production cooling bed waste heat recovery device and method

Abstract

The invention discloses a drill tool production cooling bed waste heat recovery device and method, and relates to the field of waste heat recovery. The drill tool production cooling bed waste heat recovery device comprises a plurality of waste heat recovery boxes, the waste heat recovery boxes are arranged in multiple rows, a cooling bed unit is arranged below the waste heat recovery boxes, a plurality of air blowers are arranged below the cooling bed unit, and the air blowers blow hot air from bottom to top to flow into the waste heat recovery boxes. According to the drill tool production cooling bed waste heat recovery device, the multiple waste heat recovery boxes are arranged, the heating pipelines are installed in the waste heat recovery boxes, hot air flow below the cooling bed unit is blown upwards into the waste heat recovery boxes in cooperation with the air blower, the hot air flow can fully exchange heat with water in the heating pipelines, and the waste heat recovery efficiency is greatly improved.

Description

Technical Field

[0001] This invention relates to the field of waste heat recovery technology, specifically to a waste heat recovery device and method for a cutting tool manufacturing cooling bed. Background Technology

[0002] In the production of drill bits, the cooling bed, as an important cooling device, loses a significant amount of heat to the surrounding environment as the temperature decreases. This not only results in a huge waste of energy, contradicting current energy conservation and environmental protection principles, but also may affect the production environment and the normal operation of equipment due to heat accumulation in the workshop.

[0003] Currently available waste heat recovery devices for cooling beds suffer from several drawbacks. Some devices only recover a small amount of waste heat through simple structures, failing to fully utilize the large amount of heat energy generated by the cooling bed. Others, due to unreasonable structural design, cause numerous inconveniences during normal production, maintenance, and repair of the cooling bed. For instance, devices that completely cover the cooling bed and are difficult to move can interfere with the operation of the gantry crane above the cooling bed and the manual handling of defective hot-rolled products. Therefore, developing a highly efficient waste heat recovery device that does not disrupt the normal operation of the cooling bed is urgently needed. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a waste heat recovery device and method for cold bed production, which solves the problems of low recovery efficiency and impact on normal production and maintenance of the cold bed in existing waste heat recovery devices.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solution: a waste heat recovery device for a cooling bed in the production of drill bits, comprising multiple waste heat recovery boxes arranged in multiple rows, a cooling bed unit arranged below the multiple waste heat recovery boxes, and multiple blowers arranged below the cooling bed unit, the multiple blowers blowing hot air from bottom to top into the multiple waste heat recovery boxes.

[0006] Heating pipes are installed inside each of the multiple waste heat recovery boxes. A main water inlet pipe and a main drain pipe are respectively installed above the discharge end and the feeding end of the cooling bed unit. The main water inlet pipe and the main drain pipe are respectively installed on the side of the multiple waste heat recovery boxes, and connecting pipes are installed between adjacent rows of heating pipes. The end of the main drain pipe is connected to a heat pipe heat exchanger, and the heat pipe heat exchanger is connected to a heat pipe waste heat boiler and a steam turbine generator set connected to the heat pipe waste heat boiler.

[0007] Preferably, the waste heat recovery box has a heating cavity inside, and the heating cavity is equipped with multiple airflow guiding components, which are connected to the heating pipeline. The top of the waste heat recovery box is equipped with an exhaust pipe that communicates with the heating cavity.

[0008] Preferably, the heating pipe is configured as a wave shape, which consists of multiple bends and multiple parallel sections connected sequentially. The airflow guiding component includes a guiding component and an air intake component. The air intake component includes an air intake shroud and an air intake cavity. The air intake cavity is opened inside the air intake shroud, and the air intake shroud is embedded in the bottom of the waste heat recovery box.

[0009] Preferably, the guiding component includes a vertical section, the top of which is provided with a surrounding heating section, one bottom end of which is fixedly connected to the air intake hood, and the other bottom end of which is fixedly connected to a surrounding exhaust section. The inner ring of the surrounding heating section forms a surrounding heating area, and the surrounding heating area is closely fitted with the parallel section of the heating pipe.

[0010] Preferably, the guide component has a communicating cavity inside, the end of the surrounding exhaust section has an exhaust port, the communicating cavity is connected to the intake cavity and the exhaust port, and the exhaust port is connected to the heating cavity.

[0011] Preferably, the cooling bed unit includes a feeding rack and multiple ring belt conveyor assemblies. The multiple ring belt conveyor assemblies are arranged in multiple rows and staggered. The feeding rack is located at the feeding end of the multiple ring belt conveyor assemblies, and a drill bit suspension space is formed between adjacent ring belt conveyor assemblies in the same row. The blower is installed in the drill bit suspension space, and the waste heat recovery box is installed above the drill bit suspension space.

[0012] Preferably, the belt conveyor assembly includes a guide rail frame and a support frame. The guide rail frame is fixedly installed on the top of the support frame. A drive wheel, a driven wheel, and a positioning wheel are rotatably arranged at both ends and the bottom of the guide rail frame, respectively. The belt body is arranged around the drive wheel, the driven wheel, and the positioning wheel.

[0013] Preferably, the feeding rack is provided with multiple rollers, and the upper surfaces of the multiple rollers are at the same level as the upper surface of the belt body.

[0014] Preferably, connecting strips are fixedly connected between the multiple waste heat recovery boxes, and fixing frames are installed on the outside of the waste heat recovery boxes at both ends.

[0015] A method for a waste heat recovery device for a cutting tool manufacturing cooling bed includes the following steps:

[0016] S1. The drill bit is conveyed and moved on the cooling bed unit, and the blower blows the hot air upward into the waste heat recovery box.

[0017] S2. The hot airflow heats the water in the heating pipes in the waste heat recovery box. Since the main water inlet pipe and the main drain pipe are located above the discharge end and the feeding end of the cooling bed unit, respectively, and the heated water flows through the connecting pipe in the adjacent heating pipes, the heated water flows from the lower temperature position to the higher temperature position.

[0018] S3, finally flows into the heat pipe heat exchanger through the drain main, and then generates steam through the heat pipe waste heat boiler to drive the steam turbine generator set to generate electricity.

[0019] Its beneficial effects are as follows:

[0020] 1. This waste heat recovery device for the cooling bed in the drill bit production process utilizes multiple waste heat recovery boxes with heating pipes installed within them. A blower forces hot air from below the cooling bed unit upwards into the waste heat recovery boxes, allowing for efficient heat exchange between the hot air and the water in the heating pipes, significantly improving waste heat recovery efficiency. The inlet and outlet mains are located above the discharge and loading ends of the cooling bed unit, respectively. Connecting pipes allow heated water to flow from lower to higher temperatures within adjacent rows of heating pipes. This water circulation design fully utilizes waste heat, further enhancing heat utilization efficiency. Hot water flowing from the outlet main flows into a heat pipe heat exchanger, which then generates steam through a heat pipe waste heat boiler to drive a turbine generator set for power generation. This multi-stage energy utilization, from waste heat recovery and heat transfer to final power generation, improves the overall energy utilization rate.

[0021] 2. This waste heat recovery device for the cooling bed in the drill bit manufacturing process features an air intake hood embedded at the bottom of the waste heat recovery box. This hood precisely receives the hot airflow blown upwards by the blower, forming a concentrated airflow channel through the internal air intake cavity. This prevents the hot airflow from diffusing and losing heat in the initial stage of entering the waste heat recovery box, ensuring that more heat is introduced into subsequent heat exchange stages. The surrounding heating section of the guiding component forms a surrounding heating zone that fits tightly against the parallel section of the heating pipe, allowing the hot airflow to concentrate on the key heat exchange areas of the heating pipe under the guidance of the connecting cavity. This surrounding contact greatly increases the contact area and contact time between the hot airflow and the heating pipe, allowing for more complete heat exchange and significantly improving heat transfer efficiency. After the hot airflow has heated the heating pipe, it is discharged into the heating cavity through the exhaust port at the end of the surrounding exhaust section. This design allows the heat-exchanged airflow to flow in an orderly manner and is finally discharged through the exhaust pipe, avoiding heat retention or localized overheating caused by turbulent airflow inside the waste heat recovery box, thus ensuring a stable operating environment inside the waste heat recovery box. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 This is a schematic diagram of the cooling bed unit and blower of the present invention;

[0025] Figure 3 This is a schematic diagram of the structure of the ring belt conveyor assembly of the present invention;

[0026] Figure 4 This is a schematic diagram of the structure of multiple waste heat recovery boxes of the present invention;

[0027] Figure 5 This is a cross-sectional view of the multiple waste heat recovery boxes of the present invention;

[0028] Figure 6 This is a partial cross-sectional view of the waste heat recovery box of the present invention;

[0029] Figure 7 This is a planar sectional view of the waste heat recovery box of the present invention;

[0030] Figure 8 This is a schematic diagram of the structure between the heating pipe and the airflow guiding component of the present invention;

[0031] Figure 9 This is a diagram of the control device architecture according to Embodiment 2 of the present invention;

[0032] Figure 10 This is a schematic diagram of the overall process of Embodiment 2 of the present invention;

[0033] Figure 11 This is a flowchart illustrating the initial startup phase of Embodiment 2 of the present invention;

[0034] Figure 12 This is a flowchart illustrating the dynamic operation phase of Embodiment 2 of the present invention.

[0035] Figure 13 This is a flowchart illustrating the shutdown phase of Embodiment 2 of the present invention.

[0036] In the diagram: 1. Waste heat recovery box; 11. Heating pipeline; 111. Parallel section; 112. Bending section; 12. Heating cavity; 13. Airflow guiding assembly; 131. Guiding component; 1311. Vertical section; 1312. Surrounding heating section; 1313. Surrounding exhaust section; 1314. Surrounding heating zone; 1315. Connecting cavity; 1316. Exhaust port; 132. Air intake component; 1321. Air intake hood; 1322. Air intake cavity; 2. Cooling bed unit; 21. Loading rack; 22. Belt conveyor assembly; 221. Guide rail frame; 222. Support frame; 223. Drive wheel; 224. Driven wheel; 225. Positioning wheel; 226. Belt body; 23. Squeegee suspension space; 3. Blower; 4. Water inlet main pipe; 5. Drainage main pipe; 6. Connecting pipe; 7. Exhaust pipe. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are described clearly and completely. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0039] Example 1: This embodiment of the invention discloses a waste heat recovery device for a cooling bed in drill bit production, according to the attached... Figure 1 Appendix Figure 4 and attached Figure 5 As shown, it includes multiple waste heat recovery boxes 1, which are arranged in multiple rows. A cooling bed unit 2 is arranged below the multiple waste heat recovery boxes 1, and multiple blowers 3 are arranged below the cooling bed unit 2. The multiple blowers 3 blow hot air from bottom to top into the multiple waste heat recovery boxes 1.

[0040] Each of the multiple waste heat recovery boxes 1 is equipped with a heating pipe 11. A water inlet main pipe 4 and a drain main pipe 5 are respectively installed above the discharge end and the feeding end of the cooling bed unit 2. The water inlet main pipe 4 and the drain main pipe 5 are respectively installed on the side of the multiple waste heat recovery boxes 1. A connecting pipe 6 is installed between adjacent rows of heating pipes 11. The end of the drain main pipe 5 is connected to the heat pipe heat exchanger. The heat pipe heat exchanger is connected to the heat pipe waste heat boiler and the steam turbine generator set connected to the heat pipe waste heat boiler.

[0041] By setting up multiple waste heat recovery boxes 1 and installing heating pipes 11 inside each box, and using a blower 3 to blow hot air from below the cooling bed unit 2 upwards into the waste heat recovery box 1, the hot air can fully exchange heat with the water in the heating pipes 11, greatly improving the waste heat recovery efficiency. The inlet water main 4 and outlet water main 5 are respectively located above the discharge end and feed end of the cooling bed unit 2. Simultaneously, connecting pipes 6 allow heated water to flow from lower to higher temperatures in adjacent rows of heating pipes 11. This water circulation design fully utilizes waste heat, further improving heat utilization efficiency. The hot water flowing out through the outlet water main 5 flows into the heat pipe heat exchanger, and then generates steam through the heat pipe waste heat boiler to drive a steam turbine generator set for power generation. This achieves multi-stage energy utilization from waste heat recovery and heat transfer to final power generation, improving the overall energy utilization rate.

[0042] According to the appendix Figure 4-5 As shown, the waste heat recovery box 1 further includes a heating cavity 12 inside, and multiple airflow guiding components 13 are installed in the heating cavity 12. The multiple airflow guiding components 13 are connected to the heating pipe 11, and an exhaust pipe 7 connected to the heating cavity 12 is installed on the top of the waste heat recovery box 1.

[0043] According to the appendix Figure 6-7 As shown, the heating pipe 11 is further configured as a wave shape, which is composed of multiple bent sections 112 and multiple parallel sections 111, and the multiple bent sections 112 and multiple parallel sections 111 are connected in sequence. The airflow guiding component 13 includes a guiding component 131 and an air intake component 132. The air intake component 132 includes an air intake shroud 1321 and an air intake cavity 1322. The air intake cavity 1322 is opened inside the air intake shroud 1321, and the air intake shroud 1321 is embedded in the bottom of the waste heat recovery box 1.

[0044] The guide component 131 includes a vertical section 1311, a surrounding heating section 1312 is provided at the top of the vertical section 1311, one end of the bottom of the vertical section 1311 is fixedly connected to the air intake shroud 1321, and the other end of the bottom of the vertical section 1311 is fixedly connected to the surrounding exhaust section 1313. The inner ring of the surrounding heating section 1312 forms a surrounding heating area 1314, and the surrounding heating area 1314 is tightly fitted with the parallel section 111 of the heating pipe 11.

[0045] The guide component 131 has a communicating cavity 1315 inside, and an exhaust port 1316 is provided around the end of the exhaust section 1313. The communicating cavity 1315 is connected to the intake cavity 1322 and the exhaust port 1316, and the exhaust port 1316 is connected to the heating cavity 12.

[0046] The air intake shroud 1321 of the air intake component 132 is embedded in the bottom of the waste heat recovery box 1, accurately receiving the hot airflow blown upwards by the blower 3. Through the internal air intake cavity 1322, a concentrated airflow channel is formed, preventing the hot airflow from diffusing and losing heat in the initial stage of entering the waste heat recovery box 1, ensuring that more heat is introduced into subsequent heat exchange stages. The surrounding heating zone 1314 formed by the surrounding heating section 1312 of the guiding component 131 is closely fitted with the parallel section 111 of the heating pipe 11, allowing the hot airflow, guided by the connecting cavity 1315, to concentrate on the key heat exchange area of ​​the heating pipe 11. This surrounding contact greatly increases the contact area and contact time between the hot airflow and the heating pipe 11, allowing for more complete heat exchange and significantly improving heat transfer efficiency. After the hot airflow completes the heating of the heating pipe 11, it is discharged into the heating cavity 12 through the exhaust port 1316 at the end of the exhaust section 1313. This design allows the airflow after heat exchange to flow in an orderly manner and finally be discharged through the exhaust pipe 7, avoiding heat retention or local overheating caused by turbulent airflow inside the waste heat recovery box 1, and ensuring a stable operating environment inside the waste heat recovery box 1.

[0047] According to the appendix Figure 2 As shown, the cooling bed unit 2 further includes a feeding rack 21 and multiple ring conveyor assemblies 22. The multiple ring conveyor assemblies 22 are arranged in multiple rows and staggered. The feeding rack 21 is located at the feeding end of the multiple ring conveyor assemblies 22, and a drill bit suspension space 23 is formed between adjacent ring conveyor assemblies 22 in the same row. The blower 3 is installed in the drill bit suspension space 23, and the waste heat recovery box 1 is installed above the drill bit suspension space 23.

[0048] According to the appendix Figure 3 As shown, the belt conveyor assembly 22 further includes a guide rail frame 221 and a support frame 222. The guide rail frame 221 is fixedly installed on the top of the support frame 222. The two ends and the bottom of the guide rail frame 221 are respectively rotatably provided with a drive wheel 223, a driven wheel 224 and a positioning wheel 225. The belt body 226 is arranged around the drive wheel 223, the driven wheel 224 and the positioning wheel 225.

[0049] In practical use, a variable frequency motor can be installed on the side of each guide rail 221, and multiple variable frequency motors can be used to drive multiple drive wheels 223 to rotate simultaneously. At the same time, a drive shaft can be installed between multiple drive wheels 223 in the same column, and a variable frequency motor can be installed at the end of the drive shaft. Then, the variable frequency motor and the drive shaft can drive multiple drive wheels 223 in the same column to rotate simultaneously, thereby achieving the driving function.

[0050] According to the appendix Figure 2 As shown, furthermore, multiple rollers are rotatably arranged on the feeding rack 21, and the upper surfaces of the multiple rollers are at the same level as the upper surface of the belt body 226.

[0051] According to the appendix Figure 1 As shown, furthermore, connecting strips are fixedly connected between multiple waste heat recovery boxes 1, and fixing frames are installed on the outside of the waste heat recovery boxes 1 at both ends.

[0052] A method for a waste heat recovery device for a cutting tool manufacturing cooling bed includes the following steps:

[0053] S1. The drill bit is conveyed and moved on the cooling bed unit 2, and the blower 3 blows the hot air upward into the waste heat recovery box 1.

[0054] S2. The hot airflow heats the water in the heating pipe 11 in the waste heat recovery box 1. Since the water inlet pipe 4 and the water outlet pipe 5 are located above the discharge end and the feeding end of the cooling bed unit 2 respectively, and the heated water flows in the adjacent heating pipe 11 through the connecting pipe 6, the heated water flows from the position with a lower temperature to the position with a higher temperature.

[0055] S3, finally flows into the heat pipe heat exchanger through the main drain pipe 5, and then generates steam through the heat pipe waste heat boiler to drive the steam turbine generator set to generate electricity.

[0056] Tool loading and cooling bed startup: The tool to be cooled enters the cooling bed unit 2 via the loading rack 21. Multiple rollers on the loading rack 21 are kept at the same horizontal plane as the upper surface of the ring conveyor assembly 222's main body 226, ensuring a smooth transition of the tool to the ring conveyor assembly 22. The cooling bed unit 2 is started, and the drive wheel 223 rotates the main body 226. The tool begins to move along the multiple rows of staggered ring conveyor assemblies 22, entering the cooling process.

[0057] Hot airflow generation and delivery: As the drill bit moves on the cooling bed unit 2, the heat it emits creates a thermal environment below the cooling bed unit 2. The blower 3 installed in the drill bit suspension space 23 is started, and the blower 3 blows the hot airflow below the cooling bed unit 2 from bottom to top. The hot airflow passes through the gaps between the ring conveyor components 22 and flows towards the waste heat recovery box 1 above.

[0058] Hot air enters the waste heat recovery box 1 and participates in heat exchange: The hot air first enters the air intake component 132 at the bottom of the waste heat recovery box 1, and enters the air intake cavity 1322 through the air intake hood 1321. Subsequently, the hot air flows upward through the connecting cavity 1315 of the guide component 131, reaching the surrounding heating zone 1314 of the surrounding heating section 1312. Since the surrounding heating zone 1314 is in close contact with the parallel section 111 of the heating pipe 11, the hot air fully exchanges heat with the water in the heating pipe 11 here, heating the water. The gas that has completed heat exchange in the waste heat recovery box 1 enters the heating cavity 12 through the exhaust port 1316 of the exhaust section 1313 around the guide component 131, and finally exits through the exhaust pipe 7 at the top of the waste heat recovery box 1, ensuring stable air pressure inside the waste heat recovery box 1.

[0059] The circulation and transport of heated water: The main inlet pipe 4 transports cold water to the heating pipe 11 above the discharge end of the cooling bed unit 2. After being heated by the hot airflow, the water flows through the connecting pipe 6 in the adjacent rows of heating pipes 11, and flows from the lower temperature position to the higher temperature position, continuously absorbing heat. Finally, the heated water collects in the main drain pipe 5 above the feeding end.

[0060] Further conversion and utilization of waste heat: The main drain pipe 5 transports hot water to a heat pipe heat exchanger, which further extracts heat from the hot water. The extracted heat is transferred to a heat pipe waste heat boiler, where the water is heated to generate steam. The steam drives a steam turbine generator set, realizing the conversion of thermal energy into electrical energy and completing the entire waste heat recovery and utilization process.

[0061] Example 2: According to the appendix Figure 9 As shown, based on Embodiment 1, a further step is to install a PLC controller and supporting control module in the electrical control cabinet near the device, which serves as the core for the logic judgment and instruction output of the entire device.

[0062] A blower frequency converter is installed in the electrical control cabinet of the blower 3. The blower frequency converter is electrically connected to the PLC controller and is used to adjust the output power of the blower 3 and control the airflow speed and flow rate of the hot air. An inlet solenoid flow valve is installed at the end of the inlet main pipe 4 near the water source. The inlet solenoid flow valve is used to precisely control the flow rate of the medium entering the heating pipe 11. An exhaust pipe butterfly valve is installed on the exhaust pipe 7 at the top of each waste heat recovery box 1. The exhaust pipe butterfly valve is used to adjust the exhaust volume and control the airflow pressure and disturbance intensity in the heating cavity 12. A water supply pump is installed on the pipeline between the water source and the inlet main pipe 4. The water supply pump is connected to a water supply pump controller. The water supply pump controller is linked with the PLC controller to control the start and stop of the water supply pump and its output power, ensuring the filling of the medium in the heating pipe 11.

[0063] A cooling bed tool temperature sensor is installed at the end of the feeding rack 21 and the middle of the belt conveyor assembly 22 of the cooling bed unit 2. The sensor probe faces the tool surface and is used to detect the temperature T1 of the hot tool in real time. A heating pipe inlet temperature sensor is installed at the connection between the water inlet main pipe 4 and the first waste heat recovery box 1. The heating pipe inlet temperature sensor is close to the outer wall of the heating pipe 11 and is used to detect the initial temperature of the heating medium. A heating pipe outlet temperature sensor is installed at the connection between the drain main pipe 5 and the last waste heat recovery box 1. The heating pipe outlet temperature sensor is close to the outer wall of the heating pipe 11 and is used to detect the temperature T2 of the heating medium after absorbing heat. An exhaust pipe temperature sensor is installed inside the exhaust pipe 7 at the top of each waste heat recovery box 1. The exhaust pipe temperature sensor collects the initial temperature T0 before the device is started and continuously detects the temperature T3 of the hot gas flow discharged after heat exchange during operation.

[0064] A hot air flow sensor is installed between the air outlet of blower 3 and the air inlet shroud 1321, and the hot air flow sensor is located below the waste heat recovery box 1 to detect the hot air flow rate Q1 entering the waste heat recovery box 1; a heating medium flow sensor is installed after the electromagnetic flow valve of the water inlet main pipe 4 to detect the medium flow rate Q2 entering the heating pipe 11; a pressure sensor is installed on the pipe between the drain main pipe 5 and the heat pipe heat exchanger to detect the pressure P of the heating medium after it flows out of the waste heat recovery box 1. 压 To ensure the safe operation of the pipeline;

[0065] Meanwhile, at the end of the feeding rack 21, near the entrance of the ring conveyor assembly 22, a feeding rack tool detection sensor is installed. The feeding rack tool detection sensor uses infrared beam or weight sensing to detect whether a tool has entered the cooling bed unit 2 and trigger the device start logic.

[0066] According to the appendix Figure 10-13 As shown, the overall control flow is as follows:

[0067] S1, Initial Startup Phase Logical Judgments

[0068] When the cooling bed unit 2 is started and the feeding rack 21 detects that the temperature of the drill bit T1 is ≥ 500℃, the PLC controller determines: if the initial temperature of the exhaust pipe 7 T0 is ≤ 40℃, then the blower 3 with 30% power is started, the electromagnetic flow valve of the main water inlet pipe 4 is opened to 50%, and the water supply pump is started to fill the heating pipe 11 with medium; if T0 > 40℃, then there is residual ambient heat, and the blower 3 with 50% power is started directly.

[0069] S2, Dynamic heat exchange adjustment logic judgment

[0070] Logic 1: Determining the correlation between the cooling bed tool temperature T1 and the heating pipe outlet temperature T2.

[0071] Real-time data collection of T1 and T2 is performed. If T1 ≥ 600℃ and T2 < 150℃, the waste heat is not fully recovered. The PLC controller determines that the hot airflow is insufficient and controls the power of blower 3 to increase by 10% to 20%, while increasing the flow rate of the main water inlet pipe 4 by 10%. If T1 < 400℃ and T2 ≥ 150℃, the waste heat recovery is excessive, and the power of blower 3 is reduced by 20%, while the flow rate of the main water inlet pipe 4 is reduced by 15%.

[0072] Logic 2: Determining the correlation between hot air flow rate Q1 and heat exchange efficiency η

[0073] heat exchange efficiency

[0074] Where c is the specific heat capacity of the medium, m is the mass flow rate of the medium, ΔT is the temperature difference of the medium; ρ is the air density, and c a Let ΔT be the specific heat capacity of air. a This refers to the temperature difference of the hot airflow.

[0075] Calculation of medium mass flow rate m: The heating medium flow sensor installed after the electromagnetic flow valve 4 on the inlet main pipe directly detects the volumetric flow rate Q2 of the medium, and simultaneously calculates the flow rate based on the medium density ρ. 介 The calculation yields: m = Q² × ρ 介 ;

[0076] The temperature difference ΔT of the medium is calculated by the difference between the initial temperature of the medium entering the waste heat recovery tank 1 from the inlet temperature sensor of the heating pipeline and the final temperature of the medium flowing out of the waste heat recovery tank 1 from the outlet temperature sensor of the heating pipeline.

[0077] Hot air temperature difference ΔT a Calculation: The inlet temperature of the hot gas flow can be indirectly correlated with the temperature of the cooling bed tool or directly detected by adding an auxiliary temperature sensor at the inlet shroud 1321; the outlet temperature of the hot gas flow is detected by the exhaust pipe temperature sensor, which measures the temperature of the gas flow discharged from the exhaust pipe 7 after heat exchange, and the difference between the two is ΔT. a ;

[0078] If Q1 ≥ 80% of the design value and η < 60%, the heat exchange efficiency is low. The PLC judges that the airflow guiding component 13 may be blocked or the heating pipe 11 may be scaled. It controls the opening of the butterfly valve of the exhaust pipe 7 to increase by 10% to enhance airflow disturbance. At the same time, it records the running time. After a total of 2 hours, it triggers an audible and visual alarm to prompt manual inspection.

[0079] Logic 3: Heating medium flow rate Q2 and waste heat boiler steam demand P 蒸 Association judgment

[0080] If the heat pipe waste heat boiler feeds back the steam demand P 蒸If the flow rate is ≥90% of the design value and Q2 < 80% of the design flow rate, the PLC controller determines that the medium flow is insufficient, controls the opening of the inlet main pipe 4 flow valve to increase by 20%, and simultaneously links the power of blower 3 to increase by 15% to increase waste heat supply; if P 蒸 If the flow rate is less than 50% and Q2 is greater than or equal to 80% of the design flow rate, then reduce the flow valve opening by 30% to avoid overheating of the medium.

[0081] S3, Safety and Energy Conservation Collaborative Logic Judgment

[0082] Logic 4: Pressure P in heating pipe 11 压 Correlation determination with medium flow rate Q2

[0083] If the pressure sensor detects P 压 If the pressure is ≥1.2 times the design pressure and Q2 ≥ 90% of the design flow rate, the PLC controller determines that the pipeline resistance is too high, immediately reduces the flow valve opening to 30% and reduces the blower power to 40%, and simultaneously triggers a pressure alarm; if P 压 If the design pressure is 80% and Q2 is normal, the water supply pump is considered to be faulty, and the system should be switched to the standby water supply pump.

[0084] Logic 5: Determine the correlation between exhaust pipe 7 temperature T3 and cooling bed conveyor speed V.

[0085] The cooling bed conveying speed V reflects the number of drill bits. If V ≥ 1.5 m / min, the drill bits are densely packed, and T3 > 200℃, then the waste heat has not been fully recovered. The PLC controller then judges that the current heat exchange capacity is insufficient and increases the power of blower 3 to 80%. If V < 0.5 m / min, the drill bits are sparsely packed, and T3 < 80℃, then some blowers 3 are shut down, and the flow valve opening is reduced to 20%.

[0086] In the cooling bed unit 2, the ring conveyor assembly 22 is driven by the drive wheel 223 to rotate the ring conveyor body 226, and the cutting tool is conveyed through the movement of the ring conveyor body 226. The cooling bed conveying speed V is the same as the running speed of the ring conveyor body 226, and its calculation is based on the mechanical parameters of the ring conveyor assembly 22.

[0087] The rotational speed n of the variable frequency motor of the drive wheel 223 can be obtained from the parameters of the variable frequency motor and can be read in real time by the motor inverter; the diameter d of the drive wheel 223 is known, and its circumference L = π × d; the running speed of the belt body 226, that is, the cooling bed conveying speed V = n × L.

[0088] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0089] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A waste heat recovery device for a cooling bed in drill bit production, characterized in that, It includes multiple waste heat recovery boxes (1), which are arranged in multiple rows. A cooling bed unit (2) is arranged below the multiple waste heat recovery boxes (1), and multiple blowers (3) are arranged below the cooling bed unit (2). The multiple blowers (3) blow hot air from bottom to top into the multiple waste heat recovery boxes (1). Heating pipes (11) are installed inside each of the multiple waste heat recovery boxes (1). A water inlet pipe (4) and a drain pipe (5) are respectively installed above the discharge end and the feeding end of the cooling bed unit (2). The water inlet pipe (4) and the drain pipe (5) are respectively installed on the side of the multiple waste heat recovery boxes (1). A connecting pipe (6) is installed between adjacent rows of heating pipes (11). The end of the drain pipe (5) is connected to the heat pipe heat exchanger. The heat pipe heat exchanger is connected to the heat pipe waste heat boiler and the steam turbine generator set connected to the heat pipe waste heat boiler.

2. The waste heat recovery device for a cutting tool manufacturing cooling bed according to claim 1, characterized in that, The waste heat recovery box (1) has a heating cavity (12) inside. The heating cavity (12) is equipped with multiple airflow guiding components (13). The multiple airflow guiding components (13) are connected to the heating pipe (11). The top of the waste heat recovery box (1) is equipped with an exhaust pipe (7) that communicates with the heating cavity (12).

3. The waste heat recovery device for a cutting tool manufacturing cooling bed according to claim 2, characterized in that, The heating pipe (11) is wavy, and the wavy heating pipe (11) is composed of multiple bends (112) and multiple parallel sections (111), and the multiple bends (112) and multiple parallel sections (111) are connected in sequence. The airflow guiding component (13) includes a guiding component (131) and an air intake component (132). The air intake component (132) includes an air intake hood (1321) and an air intake cavity (1322). The air intake cavity (1322) is opened inside the air intake hood (1321), and the air intake hood (1321) is embedded in the bottom of the waste heat recovery box (1).

4. The waste heat recovery device for a cutting tool production cooling bed according to claim 3, characterized in that, The guide component (131) includes a vertical section (1311), the top of which is provided with a surrounding heating section (1312), one bottom end of which is fixedly connected to the air intake shroud (1321), and the other bottom end of which is fixedly connected to a surrounding exhaust section (1313). The inner ring of the surrounding heating section (1312) forms a surrounding heating area (1314), and the surrounding heating area (1314) is in close contact with the parallel section (111) of the heating pipe (11).

5. A waste heat recovery device for a cutting tool manufacturing cooling bed according to claim 4, characterized in that, The guide component (131) has a communicating cavity (1315) inside, and the end of the surrounding exhaust section (1313) has an exhaust port (1316). The communicating cavity (1315) is connected to the intake cavity (1322) and the exhaust port (1316), and the exhaust port (1316) is connected to the heating cavity (12).

6. The waste heat recovery device for a cutting tool manufacturing cooling bed according to claim 1, characterized in that, The cooling bed unit (2) includes a feeding rack (21) and multiple ring belt conveyor assemblies (22). The multiple ring belt conveyor assemblies (22) are arranged in multiple rows and staggered. The feeding rack (21) is located at the feeding end of the multiple ring belt conveyor assemblies (22), and a drill bit suspension space (23) is formed between adjacent ring belt conveyor assemblies (22) in the same row. The blower (3) is installed in the drill bit suspension space (23), and the waste heat recovery box (1) is installed above the drill bit suspension space (23).

7. A waste heat recovery device for a cutting tool manufacturing cooling bed according to claim 6, characterized in that, The belt conveyor assembly (22) includes a guide rail frame (221) and a support frame (222). The guide rail frame (221) is fixedly installed on the top of the support frame (222). The guide rail frame (221) is rotatably provided with a drive wheel (223), a driven wheel (224) and a positioning wheel (225) at both ends and the bottom. The belt body (226) is arranged around the drive wheel (223), the driven wheel (224) and the positioning wheel (225).

8. A waste heat recovery device for a cutting tool manufacturing cooling bed according to claim 7, characterized in that, The feeding rack (21) is equipped with multiple rollers that rotate, and the upper surfaces of the multiple rollers are at the same level as the upper surface of the belt body (226).

9. A waste heat recovery device for a cutting tool manufacturing cooling bed according to claim 1, characterized in that, Connecting strips are fixedly connected between multiple waste heat recovery boxes (1), and fixing frames are installed on the outside of the waste heat recovery boxes (1) at both ends.

10. A method for a waste heat recovery device for a cooling bed in drill bit production, used to execute the waste heat recovery device for a cooling bed in drill bit production as described in any one of claims 1-9, characterized in that, Includes the following steps: S1. The drill bit is conveyed and moved on the cooling bed unit (2), and the blower (3) blows the hot air upward into the waste heat recovery box (1); S2. The hot airflow heats the water in the heating pipe (11) in the waste heat recovery box (1). Since the water inlet pipe (4) and the drain pipe (5) are located above the discharge end and the feeding end of the cooling bed unit (2) respectively, the heated water flows through the connecting pipe (6) in the adjacent heating pipe (11), so that the heated water flows from the lower temperature position to the higher temperature position. S3, finally flows into the heat pipe heat exchanger through the drain main (5), and then generates steam through the heat pipe waste heat boiler to drive the steam turbine generator set to generate electricity.

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