A device and process for recovering quenching oil from automotive leaf springs.

Abstract

This application relates to the technical field of leaf spring production, and more particularly to a quenching oil recovery device for automotive leaf springs. The device includes a circulating water tank connected to a water spray pipe via a pipeline pump. Water flowing from the water spray pipe is used to clean the single leaf springs at the front end of the conveyor chain. A water receiving trough is located directly below the water spray pipe to collect the water flowing down from the single leaf springs. The water receiving trough has an outlet. The circulating water tank has an inlet corresponding to the outlet. An oil-water tank is located on one side of the circulating water tank, and an oil-water valve is located at the upper part of the oil-water tank, connecting to the upper part of the circulating water tank. The oil-water tank is connected to a separation tank, which separates water from the quenching oil by heating. The separation tank is connected to an oil outlet pipe. This application also relates to a quenching oil recovery process for automotive leaf springs. This application effectively reduces the loss of quenching oil caused by tempering during the production of automotive leaf springs.

Description

Technical Field

[0001] This application relates to the technical field of leaf spring production, and in particular to a device and process for recovering quenching oil from automotive leaf springs. Background Technology

[0002] Leaf springs are a common suspension structure in automobiles, bearing significant loads. To achieve high mechanical properties, leaf springs require heat treatment, which involves quenching and tempering. For automotive leaf springs, quenching is performed using quenching oil. This involves placing the leaf spring in a single piece into a quenching oil bath, then removing it and placing it in a tempering furnace for tempering.

[0003] In related technologies, the tempering temperature used for automotive leaf springs is 400-600℃. Therefore, during the production of automotive leaf springs, the surface of the leaf springs that pass through the quenching oil tank is covered with quenching oil. When the quenching oil enters the tempering furnace along with the automotive leaf springs, it will be burned off due to the high temperature in the tempering furnace. According to actual calculations, an average of 3 kg of quenching oil is lost for every ton of leaf springs produced. Summary of the Invention

[0004] In order to reduce the loss of quenching oil caused by tempering during the production of automotive leaf springs, this application provides an automotive leaf spring quenching oil recovery device and recovery process.

[0005] This application provides a device for recovering quenching oil from automotive leaf springs, employing the following technical solution: A quenching oil recovery device for automotive leaf springs includes a circulating water tank connected to a water spray pipe via a pipeline pump. The water flowing from the water spray pipe is used to clean the single leaf springs at the front end of the conveyor chain. A water receiving trough is provided directly below the water spray pipe to collect the water flowing down from the single leaf springs. The water receiving trough has an outlet. The circulating water tank has an inlet corresponding to the outlet. An oil-water tank is provided on one side of the circulating water tank. An oil-water valve is provided at the upper part of the oil-water tank, connecting to the upper part of the circulating water tank. The oil-water tank is connected to a separation tank, which separates the water in the quenching oil by heating. The separation tank is connected to an oil outlet pipe.

[0006] By adopting the above technical solution, during use, the circulating water tank first delivers water to the spray pipe via a pipeline pump. The water sprayed from the spray pipe cleans the single leaf spring at the front end of the conveyor chain, allowing the single leaf spring to shed the attached quenching oil before tempering. The quenching oil mixed with water flows into the circulating water tank through the water receiving tank. Due to the large volume of water in the circulating water tank, the quenching oil can float on the surface of the water through oil-water stratification. An oil-water valve is installed at the top of the oil-water tank. When there is a lot of quenching oil in the circulating water tank, the oil-water valve can be opened to allow the quenching oil to flow into the oil-water tank and then into the separation tank. The water is further evaporated by heating to retain the quenching oil. This allows the quenching oil to be recovered during the production of automotive leaf springs, reducing the loss of quenching oil during tempering.

[0007] Preferably, a heating pipe is provided between the pipeline pump and the water spray pipe, the heating pipe is heated by a tempering furnace, and the separation tank is heated by the residual heat of the tempering furnace.

[0008] By adopting the above technical solution, a heating pipe is installed between the pipeline pump and the water spray pipe. The water entering the water spray pipe is heated by the tempering furnace, so that the water temperature is higher. This makes it easier to clean the quenching oil on the single leaf spring. The residual heat in the tempering furnace is used to heat the separation tank, reducing the heat required for water evaporation.

[0009] Preferably, the circulating water tank is connected to an inlet pipe, and a float valve is installed at one end of the inlet pipe inside the circulating water tank.

[0010] By adopting the above technical solution, the float valve can automatically replenish water when the water in the circulating water tank is insufficient. At the same time, when the oil-water valve is opened, the quenching oil in the upper layer of the circulating water tank flows into the oil-water tank, and the water inlet pipe can automatically replenish water through the float valve, thereby raising the quenching oil below the position of the oil-water valve and then discharging it from the circulating water tank.

[0011] Preferably, the separation tank is provided with a separation component, the separation component includes an evaporation plate, the evaporation plate is rotatably disposed in the separation tank around a horizontal axis, and a hydrophilic substance is disposed on the surface of the evaporation plate. The evaporation plate is connected to a drive component for driving the evaporation plate to rotate, and the oil level in the separation tank is lower than the position of the center line of the evaporation plate rotation.

[0012] By adopting the above technical solution, the surface of the evaporator plate is provided with a hydrophilic substance. When the evaporator plate is located below the oil level in the separation tank, the evaporator plate can adsorb water in the oil. Then, when the evaporator plate is rotated above the oil level by the driving component, the evaporator plate can evaporate the adsorbed water under the action of heating, and then continue to adsorb water in the oil, thereby further reducing the moisture in the quenching oil.

[0013] Preferably, an intermediate shaft is fixedly installed inside the separation tank. The intermediate shaft is a hollow structure. A hot air pipe is connected to the intermediate shaft. The hot air pipe is used to connect to the tempering furnace. A rotating sleeve is rotatably installed on the intermediate shaft. One side of the evaporation plate is fixed on the rotating sleeve. A heating hole is opened inside the evaporation plate. The heating hole is connected to the inside of the intermediate shaft through the rotating sleeve.

[0014] By adopting the above technical solution, an intermediate shaft is fixed in the separation tank. The intermediate shaft is connected to a hot air pipe, which is connected to a tempering furnace. This allows the heat in the tempering furnace to enter the intermediate shaft through the hot air pipe and then to the heating holes of the evaporation plate, thereby achieving the effect of evaporating the moisture in the quenching oil using the heat in the tempering furnace.

[0015] Preferably, one end of the heating hole is used to connect to the intermediate shaft, and the other end is away from the intermediate shaft and is provided with a thermal control valve. A valve closing frame is fixedly provided in the separation groove. The valve closing frame has an opening and is arranged facing upward. The position of the valve closing frame corresponds to that of the thermal control valve. When the thermal control valve rotates into the valve closing frame, the valve closing frame closes the thermal control valve. When the thermal control valve rotates to the opening position of the valve closing frame, the thermal control valve automatically opens the heating hole.

[0016] By adopting the above technical solution, the thermal control valve is installed on the heating hole and closed by the valve closing bracket. When the end of the heating hole is below the liquid level of the quenching oil, the valve closing bracket blocks the heating hole, reducing unnecessary heating of the quenching oil by hot gas and reducing the amount of quenching oil entering the heating hole. When the thermal control valve reaches the opening position of the valve closing bracket, the thermal control valve opens the heating hole, allowing the heat to heat the evaporation plate located outside the quenching oil, causing the moisture on the evaporation plate to evaporate, and then enter the quenching oil for cooling and easy adsorption of moisture in the quenching oil.

[0017] Preferably, the thermal control valve includes a sealing cone, a spring, and a vent plate. The vent plate is fixed inside the heating hole. The smaller end of the sealing cone is located inside the heating hole, and the larger end of the sealing cone is located outside the heating hole. The sealing cone is controlled by a valve closing bracket to move closer to the heating hole and block the heating hole. The spring is disposed between the sealing cone and the vent plate, and the force of the spring is used to drive the sealing cone to open the heating hole.

[0018] By adopting the above technical solution, the sealing cone is set at the opening of the heating hole. When the sealing valve frame pushes, the sealing cone can squeeze the spring, thereby sealing the heating hole. After the sealing cone is released, the spring can automatically open the sealing cone.

[0019] Preferably, an inner rod is slidably disposed at the center of the sealing cone. One end of the inner rod is slidably connected to the vent plate, and the other end is located outside the heating hole and sleeved on the compression spring. One end of the compression spring abuts against the sealing cone, and the other end abuts against the inner rod. The direction of the force exerted by the compression spring on the sealing cone is opposite to the direction of the force exerted by the spring on the sealing cone.

[0020] By adopting the above technical solution, the inner rod is slidably connected to the vent plate, so that the inner rod abuts against the valve frame. Thus, the inner rod acts on the sealing cone through the compression spring, so that the valve frame has a better sealing effect on the sealing cone, reducing air leakage or jamming.

[0021] Preferably, the drive assembly includes a drive gear, a driven gear, a rotating shaft, and a drive motor. The drive motor is fixed to the side wall of the separation tank. The rotating shaft is rotatably connected to the separation tank and driven by the drive motor. The drive gear is coaxially fixed to the rotating shaft. The driven gear is coaxially fixed to the evaporation plate. The drive gear meshes with the driven gear.

[0022] By adopting the above technical solution, the drive motor drives the rotating shaft to rotate, and the driving gear on the rotating shaft drives the driven gear to rotate, so that the driven gear can drive the evaporation plate to rotate, and the evaporation plate moves up and down on the surface of the quenching oil under the action of the drive component.

[0023] This application also provides a process for recovering quenching oil from automotive leaf springs, employing the following technical solution: A process for recycling quenching oil from automotive leaf springs includes cleaning the quenching oil adhering to a single leaf spring, separating the oil and water through oil-water separation, and then further evaporating the water in the quenching oil by heating.

[0024] By adopting the above technical solution, the single leaf spring is first cleaned to obtain an oil-water mixture, then the oil and water are separated by layering, and then the water is further evaporated by heating, so that the water content in the quenching oil reaches the quality that can be reused for quenching.

[0025] In summary, this application includes at least one of the following beneficial technical effects: 1. By cleaning the single leaf springs at the front end of the conveyor chain, the adhering quenching oil is removed from the single leaf springs before tempering. Then, the quenching oil is made to float on the surface of the water through oil-water separation. The oil-water valve is opened to allow the quenching oil to flow into the oil-water tank, and then into the separation tank. The water is further evaporated by heating to retain the quenching oil. In this way, the quenching oil can be recovered during the production of automotive leaf springs, reducing the loss of quenching oil during tempering. 2. The evaporator can adsorb water from the oil. When the evaporator is rotated above the oil surface by the drive component, the water adsorbed by the evaporator can be evaporated under the action of heating. Then, it can continue to adsorb water from the oil, thereby further reducing the water content in the quenching oil. 3. The inner rod is slidably connected to the vent plate, so that the inner rod abuts against the valve frame. Thus, the inner rod acts on the sealing cone through the compression spring, so that the valve frame has a better sealing effect on the sealing cone. Attached Figure Description

[0026] Figure 1 This is a flowchart illustrating an embodiment of this application; Figure 2 This is a schematic diagram of the internal structure of the separation tank in an embodiment of this application; Figure 3 This is a schematic diagram of the overall structure of the separation tank in an embodiment of this application; Figure 4 This is a schematic diagram showing the position of the evaporator plate in an embodiment of this application; Figure 5 This is a schematic diagram of the structure of the intermediate shaft in the embodiments of this application; Figure 6 This is a schematic diagram of the thermal control valve in an embodiment of this application.

[0027] Explanation of reference numerals in the attached diagram: 1. Circulating water tank; 11. Pipeline pump; 12. Spray pipe; 13. Inlet; 14. Heating pipe; 15. Baffle plate; 2. Conveyor chain; 31. Spray tank; 32. Water receiving tank; 321. Outlet; 4. Oil-water tank; 41. Oil-water valve; 42. Self-priming pump; 5. Inlet pipe; 51. Float valve; 6. Separation tank; 61. Oil outlet pipe; 62. Valve; 63. Water receiving plate; 64. Drain pipe; 65. Sealing plate; 66. 7. Hot air duct; 8. Separation assembly; 9. Evaporator plate; 10. Heating hole; 11. Intermediate shaft; 12. Vent hole; 23. Rotating sleeve; 4. Drive assembly; 5. Drive gear; 6. Driven gear; 74. Rotating shaft; 85. Drive motor; 96. Thermal control valve; 17. Sealing cone; 18. Spring; 19. Vent plate; 10. Valve closing bracket; 11. Arc groove; 12. Center hole; 13. Inner rod; 14. Compression spring; 15. Hemispherical cap. Detailed Implementation

[0028] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.

[0029] This application discloses a device for recovering quenching oil from automotive leaf springs, as shown in the following embodiments. Figure 1The tempering furnace includes a circulating water tank 1, connected to a pipeline pump 11. One end of the pipeline pump 11 is connected to a water spray pipe 12, which is used to clean the single-leaf springs inside the furnace. A conveyor chain 2 is installed inside the furnace, on which the single-leaf springs are placed and moved within the furnace. The single-leaf springs at the front end of the conveyor chain 2 are coated with quenching oil. The heating point of the tempering furnace is located in the middle of the conveyor chain 2, while the tail end of the conveyor chain 2 is the residual heat diffusion zone. The water spray pipe 12 is located above the front end of the conveyor chain 2. When the pipeline pump 11 delivers water from the circulating water tank 1 to the spray pipe 12, the spray pipe 12 sprays water downwards to rinse the surface of the single leaf spring, thereby cleaning away the quenching oil on the surface of the single leaf spring. When the single leaf spring moves with the conveyor chain 2 to the heating position of the tempering furnace, there is less quenching oil on the single leaf spring, thereby reducing the decomposition of the quenching oil in the tempering furnace, and thus reducing the environmental pollution caused by the combustion of quenching oil during the tempering process.

[0030] refer to Figure 1 A water spray trough 31 is located directly below the water spray pipe 12. The water spray trough 31 is a rectangular box located above the conveyor chain 2. The upper opening of the water spray trough 31 is used to collect the water flowing out of the water spray pipe 12. Through holes are evenly distributed at the bottom of the water spray trough 31. The bottom of the water spray trough 31 is horizontally positioned, allowing the water sprayed from the water spray pipe 12 to flow out evenly through the through holes. Multiple water outlets can be distributed on the water spray pipe 12 to ensure that water enters the water spray trough 31 relatively evenly. The water spray pipe 12 and the water spray trough 31 form a water curtain at the front end of the conveyor chain 2. When the single leaf spring passes through the water curtain, it has a good cleaning effect, allowing more quenching oil to be washed away from the single leaf spring. A water receiving trough 32 is located directly below the conveyor chain 2 to collect water mixed with quenching oil that has passed through the single leaf spring.

[0031] refer to Figure 1The water receiving tank 32 is divided into multiple sequentially connected chambers, with the interconnected positions located at the top of the chambers. One chamber at one end of the water receiving tank 32 has an outlet 321, and an inlet 13 is located on the circulating water tank 1 at a position corresponding to the outlet 321, allowing the oil-water mixture in the water receiving tank 32 to enter the circulating water tank 1. The chamber of the water receiving tank 32 furthest from the outlet 321 is positioned directly opposite the water spray tank 31, allowing the water spray tank 31 to remove the quenching oil and oxide scale formed during the pre-quenching heating from the single-leaf spring, which then falls into the water receiving tank 32, causing the oxide scale to settle in multiple chambers. To improve the cleaning effect on the quenching oil, a heating pipe 14 is installed between the pipeline pump 11 and the spray pipe 12. The heating pipe 14 is placed in the residual heat diffusion zone of the tempering furnace, with one end connected to the outlet of the pipeline pump 11 and the other end connected to the spray pipe 12. The heating tube 14 can be configured into multiple continuous S-shapes so that the water drawn from the circulating water tank 1 by the pipeline pump 11 is heated after passing through the heating tube 14, thereby improving the cleaning effect on the single leaf spring through warm water.

[0032] refer to Figure 1 An oil-water tank 4 is provided on one side of the circulating water tank 1. An oil-water valve 41 is located at the upper part of the oil-water tank 4. The oil-water valve 41 can be a solenoid valve. The oil-water valve 41 connects the circulating water tank 1 and the oil-water tank 4. When the oil-water mixture that has passed through the water receiving tank 32 flows into the circulating water tank 1, the quenching oil and water separate in the oil-water tank 4, causing the quenching oil to float on top of the water. The pipeline pump 11 is connected to the lower part of the circulating water tank 1, allowing the pipeline pump 11 to draw water from the lower part of the circulating water tank 1 for circulation. The quenching oil at the top is released into the oil-water tank 4 by opening the oil-water valve 41. A water inlet pipe 5 is connected to the circulating water tank 1. The water inlet pipe 5 is used to replenish water into the circulating water tank 1. At the same time, a float valve 51 is installed at one end of the water inlet pipe 5 inside the circulating water tank 1. The float of the float valve 51 is located on the liquid surface of the circulating water tank 1. The opening or closing of the float valve 51 is controlled by the liquid level of the circulating water tank 1. When the oil-water valve 41 is opened to discharge the quenching oil from the circulating water tank 1, the float valve 51 automatically replenishes the water in the circulating water tank 1 according to the liquid level in the circulating water tank 1, so that the quenching oil flows out further from the position of the oil-water valve 41, increasing the amount of oil discharged when the oil-water valve 41 is opened once. A baffle 15 is provided on the side of the circulating water tank 1 away from the oil-water valve 41. The baffle 15 is located at the bottom of the circulating water tank 1 to separate the circulating water tank 1, so that the oil-water stratification of the circulating water tank 1 at the position of the oil-water valve 41 is relatively stable. At the same time, the pipeline pump 11 is connected to the side of the baffle 15 away from the oil-water valve 41, so that the water inlet 13 of the circulating water tank 1 is located on the side of the baffle 15 away from the pipeline pump 11, thereby reducing the amount of impurities entering the pipeline pump 11.

[0033] refer to Figure 1 and Figure 2A self-priming pump 42 is connected to one side of the oil-water tank 4. The self-priming pump 42 is used to draw quenching oil from the oil-water tank 4. A separation tank 6 is connected to the oil outlet of the self-priming pump 42. A separation component 7 is installed in the separation tank 6 to further remove water from the quenching oil. When the water content in the quenching oil reaches a level suitable for quenching, the quenching oil in the separation tank 6 is returned to the quenching oil tank. An oil outlet pipe 61 is connected to the separation tank 6. A valve 62 is installed on the oil outlet pipe 61, which connects to the quenching oil tank, thereby enabling the quenching oil to be recovered and reducing the loss of quenching oil.

[0034] refer to Figure 2 and Figure 3 A water receiving plate 63 is provided on the top of the separation tank 6. The water receiving plate 63 is arc-shaped and the lowest point of the water receiving plate 63 is in the middle. A drain pipe 64 is fixedly provided on the side wall of the separation tank 6. The drain pipe 64 is flush with the lowest point of the water receiving plate 63 and is connected to the cavity above the water receiving plate 63. Water droplets formed by water mist on the water receiving plate 63 are collected on the water receiving plate 63 and then flow out from the drain pipe 64. A sealing plate 65 is provided above the water receiving plate 63. The sealing plate 65 is used to cover the upper part of the separation tank 6. There are two sealing plates 65, and the position between the two sealing plates 65 is directly above the water receiving plate 63, so that a channel is formed between the sealing plates 65 and the water receiving plate 63. At the same time, the two sealing plates 65 are spaced apart. When the water in the separation tank 6 is heated and evaporates, the airflow carries water mist through the channel and flows out of the separation tank 6 between the two sealing plates 65. The condensed water can be collected by the water receiving plate 63. The sealing plate 65 is in a downward inclined state above the water receiving plate 63.

[0035] refer to Figure 2 A hot air duct 66 is installed below the separation tank 6, and the hot air duct 66 is connected to the top wall of the tempering furnace. The duct introduces hot air from the residual heat diffusion zone of the tempering furnace, so that the hot air heats the separation component 7 in the separation tank 6. The separation component 7 includes an evaporation plate 71, on which an oil-water mixture flows. The surface of the evaporation plate 71 is coated with a hydrophilic substance, such as natural silica. When the oil-water mixture in the separation tank 6 flows over the evaporation plate 71, water is more easily adhered to the surface of the evaporation plate 71. The hot air duct 66 then heats the evaporation plate 71, causing the water adsorbed on the surface of the evaporation plate 71 to evaporate. The water is then absorbed again through contact with the oil-water mixture, and then evaporates again, thus forming a continuous separation process. This reduces the amount of water in the separation tank 6, allowing the quenching oil to be reused.

[0036] refer to Figure 4 and Figure 5An intermediate shaft 72 is provided inside the separation tank 6. The intermediate shaft 72 is a hollow structure and is fixed to the inner wall of the separation tank 6. Multiple hot air pipes 66 can be provided. The end of the hot air pipe 66 away from the tempering furnace is connected to the interior of the intermediate shaft 72. A rotating sleeve 73 is rotatably installed on the intermediate shaft 72. A cavity can be formed between the rotating sleeve 73 and the outer wall of the intermediate shaft 72. A vent hole 721 is provided on the intermediate shaft 72 at a position corresponding to the rotating sleeve 73, so that the hot air pipe 66 passes through the intermediate shaft 72 and the vent hole 721 to the cavity between the rotating sleeve 73 and the intermediate shaft 72. Multiple evaporation plates 71 are provided along the circumference of the rotating sleeve 73. Multiple heating holes 711 are provided inside the evaporation plates 71. The heating holes 711 are parallel to the surface of the evaporation plates 71. One side of the evaporation plate 71 is fixed to the rotating sleeve 73, and the other side extends away from the intermediate shaft 72. One end of the heating hole 711 is connected to the cavity, and the other end is away from the intermediate shaft 72. When the oil level in the separation tank 6 is at the position of the intermediate shaft 72, the rotating sleeve 73 rotates. The multiple evaporation plates 71 on the rotating sleeve 73 can rotate from top to bottom into the oil to absorb the water in the oil, and then rotate from bottom to top to above the oil surface. At this time, the hot air in the heating hole 711 flows out from the end away from the intermediate shaft 72, and can transfer heat to the surface of the evaporation plate 71 to heat the hydrophilic substances, causing the water to be removed. Then, by rotating into the oil to cool down, it is convenient to absorb water again.

[0037] refer to Figure 4 and Figure 5 Multiple separation components 7 can be installed in the separation tank 6. A drive component 8 is connected to each separation component 7. The drive component 8 includes a driving gear 81, a driven gear 82, a rotating shaft 83, and a drive motor 84. The drive motor 84 is fixed to the side wall of the separation tank 6. The driving gear 81 is coaxially fixed to the rotating shaft 83, which is rotatably connected to the separation tank 6. The output shaft of the drive motor 84 is coaxially fixed to the rotating shaft 83. The driven gear 82 is fixedly connected to an evaporation plate 71 within a set of separation components 7, so that the center of the driven gear 82 coincides with the center of the rotating sleeve 73. The driving gear 81 can mesh with two driven gears 82. The drive motor 84 then drives the evaporation plate 71 to rotate via the driving gear 81 and the driven gear 82, allowing the evaporation plate 71 to enter the oil. During contact with the oil, the oil flows over the surface of the evaporation plate 71, making it easier to absorb water from the oil. When the water content in the oil in the separation tank 6 reaches the requirements for quenching oil, it is discharged from the oil outlet pipe 61 into the quenching oil tank.

[0038] refer to Figure 5 and Figure 6A thermal control valve 9 is provided at the end of each heating hole 711 away from the intermediate shaft 72. The thermal control valve 9 includes a sealing cone 91, a spring 92, and a vent plate 93. The vent plate 93 is located inside the heating hole 711 and can allow air to pass through its opening. The small end of the sealing cone 91 is located inside the heating hole 711, and the large end of the sealing cone 91 is located outside the heating hole 711. The diameter of the large end of the sealing cone 91 is larger than the diameter of the heating hole 711. The spring 92 is disposed between the sealing cone 91 and the vent plate 93. The spring 92 is used to drive the sealing cone 91 to open the heating hole 711; a valve closing frame 94 is provided in the separation groove 6. The valve closing frame 94 can be set in a U-shape or an arc shape larger than a semicircle. One valve closing frame 94 corresponds to the thermal control valve 9 of the heating hole 711. The opening of the valve closing frame 94 is set upward. The inner wall of the valve closing frame 94 is used to drive the sealing cone 91 to move closer to the heating hole 711, so that the side wall of the sealing cone 91 abuts against the opening of the heating hole 711, thereby sealing the heating hole 711. When the evaporator plate 71 rotates to the open position of the valve frame 94, causing the sealing cone 91 to disengage from the control of the valve frame 94, the heating hole 711 of the sealing cone 91 opens, allowing hot gas to pass through and heat the evaporator plate 71. When the evaporator plate 71 rotates to be inside the oil, the sealing cone 91 closes the heating hole 711 under the action of the valve frame 94, thereby reducing the unnecessary heating of the oil in the separation tank 6 by the residual heat in the tempering furnace, which would cause the oil temperature to rise and result in the loss of quenching oil.

[0039] refer to Figure 5 and Figure 6A central hole 95 is provided in the center of the sealing cone 91. An inner rod 96 is slidably connected within the central hole 95. One end of the inner rod 96 is located inside the heating hole 711 and passes through the vent plate 93. The inner rod 96 is slidably connected to the vent plate 93. The other end of the inner rod 96 extends out of the heating hole 711. A compression spring 97 is sleeved on the end of the inner rod 96 outside the heating hole 711. One end of the compression spring 97 abuts against the sealing cone 91, and the other end is set on a hemispherical cap 98. The hemispherical cap 98 is fixed to the inner rod 96. The spherical side of the hemispherical cap 98 is away from the inner rod 96. An arc-shaped groove 941 is provided on the inner wall of the valve holder 94 to cooperate with the hemispherical cap 98, facilitating the sliding of the hemispherical groove within the arc-shaped groove 941. The elastic coefficient of the compression spring 97 is greater than that of the spring 92. In use, the hemispherical cap 98 first compresses the sealing cone 91 through the inner rod 96 and the compression spring 97, causing the sealing cone 91 to move in the direction of closing the heating hole 711. Since the elastic coefficient of the compression spring 97 is greater than that of the spring 92, it can be ensured that when the inner rod 96 is compressed, the sealing cone 91 will definitely move in the direction of the heating hole 711. Thus, even if there is slight deformation during the movement of the evaporator plate 71 relative to the valve holder 94, the sealing cone 91 can still keep the heating hole 711 sealed. In addition, when the valve holder 94 releases the inner rod 96, the compression spring 97 loses its elasticity, and the spring 92 opens the sealing cone 91, allowing hot air to heat the evaporator plate 71 through the heating hole 711.

[0040] This embodiment discloses a process for recovering quenching oil from automotive leaf springs. The process involves using the aforementioned automotive leaf spring quenching oil recovery device to clean the quenching oil adhering to a single leaf spring, then separating the oil and water through oil-water separation, and finally further evaporating the water by heating to form quenching oil with less water content.

[0041] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A device for recovering quenching oil from automotive leaf springs, characterized in that: The system includes a circulating water tank (1), which is connected to a water spray pipe (12) via a pipeline pump (11). The water flowing out of the water spray pipe (12) is used to clean the single leaf spring at the front end of the conveyor chain (2). A water receiving trough (32) is provided directly below the water spray pipe (12) to receive the water flowing down from the single leaf spring. The water receiving trough (32) has an outlet (321). The circulating water tank (1) is provided with an inlet (13) corresponding to the outlet (321). An oil-water tank (4) is provided on one side of the circulating water tank (1). An oil-water valve (41) connected to the upper part of the oil-water tank (4) is provided. The oil-water tank (4) is connected to a separation tank (6). The separation tank (6) separates the water in the quenching oil by heating. The separation tank (6) is connected to an oil outlet pipe (61). The separation tank (6) is provided with a separation component (7), which includes an evaporation plate (71). The evaporation plate (71) is rotatably disposed in the separation tank (6) around a horizontal axis, and a hydrophilic substance is disposed on the surface of the evaporation plate (71). The evaporation plate (71) is connected to a drive component (8) for driving the evaporation plate (71) to rotate. The oil level in the separation tank (6) is lower than the position of the center line of the rotation of the evaporation plate (71). An intermediate shaft (72) is fixedly installed inside the separation tank (6). The intermediate shaft (72) is a hollow structure. A hot air pipe (66) is connected to the intermediate shaft (72). The hot air pipe (66) is used to connect to the tempering furnace. A rotating sleeve (73) is rotatably installed on the intermediate shaft (72). One side of the evaporation plate (71) is fixed on the rotating sleeve (73). A heating hole (711) is opened inside the evaporation plate (71). The heating hole (711) is connected to the inside of the intermediate shaft (72) through the rotating sleeve (73). One end of the heating hole (711) is used to connect to the intermediate shaft (72), and the other end is away from the intermediate shaft (72) and is provided with a thermal control valve (9). A valve closing frame (94) is fixedly provided in the separation groove (6). The valve closing frame (94) has an opening and is set upward. The valve closing frame (94) corresponds to the position of the thermal control valve (9). When the thermal control valve (9) rotates into the valve closing frame (94), the valve closing frame (94) closes the thermal control valve (9). When the thermal control valve (9) rotates to the opening position of the valve closing frame (94), the thermal control valve (9) automatically opens the heating hole (711). The thermal control valve (9) includes a sealing cone (91), a spring (92), and a vent plate (93). The vent plate (93) is fixed inside the heating hole (711). The smaller end of the sealing cone (91) is located inside the heating hole (711), and the larger end of the sealing cone (91) is located outside the heating hole (711). The sealing cone (91) is controlled by the valve closing bracket (94) to move closer to the heating hole (711) and block the heating hole (711). The spring (92) is disposed between the sealing cone (91) and the vent plate (93). The force of the spring (92) is used to drive the sealing cone (91) to open the heating hole (711).

2. The automotive leaf spring quenching oil recovery device according to claim 1, characterized in that: A heating pipe (14) is provided between the pipeline pump (11) and the water spray pipe (12). The heating pipe (14) is heated by a tempering furnace, and the separation tank (6) is heated by the residual heat of the tempering furnace.

3. The automotive leaf spring quenching oil recovery device according to claim 1, characterized in that: The circulating water tank (1) is connected to an inlet pipe (5), and a float valve (51) is installed at one end of the inlet pipe (5) inside the circulating water tank (1).

4. The automotive leaf spring quenching oil recovery device according to claim 1, characterized in that: An inner rod (96) is slidably disposed at the center of the sealing cone (91). One end of the inner rod (96) is slidably connected to the vent plate (93), and the other end is located outside the heating hole (711) and sleeved on the compression spring (97). One end of the compression spring (97) abuts against the sealing cone (91), and the other end abuts against the inner rod (96). The direction of the force exerted by the compression spring (97) on the sealing cone (91) is opposite to the direction of the force exerted by the spring (92) on the sealing cone (91).

5. The automotive leaf spring quenching oil recovery device according to claim 1, characterized in that: The drive assembly (8) includes a drive gear (81), a driven gear (82), a rotating shaft (83), and a drive motor (84). The drive motor (84) is fixed on the side wall of the separation tank (6). The rotating shaft (83) is rotatably connected to the separation tank (6) and driven by the drive motor (84). The drive gear (81) is coaxially fixed on the rotating shaft (83). The driven gear (82) is coaxially fixed on the evaporation plate (71). The drive gear (81) meshes with the driven gear (82).

6. A process for recovering quenching oil from automotive leaf springs, comprising using an automotive leaf spring quenching oil recovery device as described in any one of claims 1-5 to recover the quenching oil, characterized in that: This process includes cleaning the quenching oil adhering to the single leaf spring, separating the oil and water through oil-water separation, and then further evaporating the water in the quenching oil by heating.

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