Automatic quenching machine for heat treatment of drill rod

Abstract

The utility model relates to the technical field of quenching, and discloses an automatic quenching machine for heat treatment of a drill rod. The feeding frame and the conveying mechanism are used for conveying drill rods needing to be quenched; a quenching assembly; the quenching assembly comprises an induction coil and a water cooling assembly, the drill rod is slowly conveyed by the conveying mechanism and moved into the induction coil for high-frequency heating, and then the heated drill rod is subjected to rapid water cooling through the water cooling assembly. According to the automatic quenching machine for heat treatment of the drill rod, through mutual combination of the conveying mechanism and the quenching assembly, automatic heating and cooling processes can be achieved, manual operation is reduced, manual investment is reduced, the production period is shortened, the production efficiency is improved, in the whole process, workers do not need to make direct contact with the high-temperature drill rod, and the production cost is reduced. And the safety risk in the operation process is greatly reduced. Due to the accurate control of the heating and cooling processes, the material waste is reduced, and the production cost is reduced.

Description

Technical Field

[0001] This invention relates to the field of quenching technology, specifically to an automatic quenching machine for heat treatment of drill rods. Background Technology

[0002] As a supporting product in the construction machinery industry, the drill rod consists of a shank, a rod body, and a drill tip. During use, it is subjected to high-frequency, high-impact loads, and the working conditions are extremely harsh. The quality of the heat treatment process directly affects the quality of the drill rod. Current drill rod quenching treatments typically involve a one-step quenching and cooling process.

[0003] Traditional drill rod heat treatment processes involve furnace heating and subsequent hoisting and cooling. This process is not only inefficient, but also, due to the separation of heating and cooling, it is difficult to achieve precise temperature control and uniform heat treatment results. This leads to uneven distribution of hardness and toughness in the drill rod, making it prone to fracture and affecting its overall performance and service life. Furthermore, the drill rod is prone to lateral deviation during movement, posing a significant safety hazard. Therefore, an automatic quenching machine for drill rod heat treatment is proposed to address the aforementioned problems. Summary of the Invention

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this invention provides an automatic quenching machine for heat treatment of drill rods, which solves the problem in existing technologies where the heat treatment temperature of drill rods cannot be uniformly controlled during quenching, resulting in uneven distribution of hardness and toughness and easy breakage of the drill rods.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, the present invention provides the following technical solution: an automatic quenching machine for heat treatment of drill rods, comprising a storage rack for placing drill rods to be quenched; a feeding rack and a conveying mechanism for conveying the drill rods to be quenched; a quenching assembly for performing stable quenching of the drill rods; and a circulation assembly for controlling the cooling water used in the quenching assembly through reflux cooling; the quenching assembly includes an induction coil and a water cooling assembly; the drill rod is slowly conveyed by the conveying mechanism and moved into the induction coil for high-frequency heating, and then rapidly water-cooled by the water cooling assembly; the feeding rack of the conveying mechanism is provided with two sets of feeding racks, and a water tank is provided between the two sets of feeding racks; a control cabinet is provided on the water tank, and the control cabinet is electrically connected to the induction coil.

[0008] Preferably, the conveying mechanism includes a drive motor, which is mounted on a feeding frame. The output end of the drive motor is fixedly connected to a drive wheel. A transmission wheel is connected to the surface of the drive wheel via a toothed belt. A roller is connected to the transmission wheel via a shaft. A transmission device is provided on the roller.

[0009] Preferably, multiple rollers are provided, and the multiple rollers are rotatably connected to the feeding frame. The transmission device includes two driven wheels, and the two driven wheels are respectively provided on the two rollers. The two driven wheels are connected by a toothed belt drive.

[0010] Preferably, the water-cooling assembly includes a connecting box, a water inlet pipe connected to the connecting box, the water inlet pipe communicating with a water tank, the water tank containing cooling water, the water inlet pipe having an inlet, the connecting box containing a collar, and the collar having a spray nozzle on its surface.

[0011] Preferably, it also includes a rotating device, which includes a water wheel rotatably connected to the water inlet pipe via a shaft. The surface of the water wheel is provided with blades, and large gears are connected to both sides of the water wheel via shafts. A rotating wheel meshes with the surface of the large gears, and the rotating wheel is connected to a collar.

[0012] Preferably, it also includes a smoking device, which includes a mating gear whose surface meshes with a large gear. The mating gear is connected to a power shaft via a shaft, and a fixed box is rotatably connected to the surface of the power shaft. The fixed box is fixed on a connecting box, and a fan blade is provided inside the fixed box on the power shaft. A suction pipe is connected to the right side of the fixed box, and an air outlet pipe is connected to the surface of the fixed box.

[0013] Preferably, it also includes a shock device for striking the oxide scale on the surface of the drill rod after cooling. The shock device includes a striking rod, a connecting shaft is fixedly connected to the striking rod, the connecting shaft is rotatably connected to a connecting box, a hook is provided on the surface of the connecting shaft, a tension spring is connected to the hook, the top of the tension spring is connected to a water tank, a pusher is connected to the side of the rotating wheel near the striking rod, and a sliding plate is connected to the side of the striking rod near the rotating wheel.

[0014] Preferably, the end face of the striking rod is rotatably connected to a striking wheel, and three striking rods are provided, with the three striking rods arranged in an array with the center of the rotating wheel as the center point.

[0015] Preferably, the circulation component includes a water tank located below the quenching component. A drain pipe is connected to the bottom of the water tank, and a chiller is connected to the bottom of the drain pipe. A return water tank is connected to one side of the chiller via a pipe. The return water tank is connected to the water tank via a connecting pipe, and a water pump is installed inside the return water tank.

[0016] (III) Beneficial Effects

[0017] Compared with the prior art, the present invention provides an automatic quenching machine for heat treatment of drill rods, which has the following beneficial effects:

[0018] 1. This automatic quenching machine for drill rod heat treatment, through the combination of a conveying mechanism and quenching components, enables automated heating and cooling processes, reducing manual operation, labor input, shortening the production cycle, and improving production efficiency. Furthermore, the entire process eliminates the need for direct human contact with the high-temperature drill rod, significantly reducing safety risks during operation. Precise control of the heating and cooling processes also reduces material waste and lowers production costs.

[0019] 2. This automatic quenching machine for heat treatment of drill rods improves the hardness and toughness of the drill rods and extends their service life through high-frequency induction heating quenching, precise temperature control, and uniform heat treatment effect.

[0020] 3. This automatic quenching machine for heat treatment of drill rods, through its water cooling device, can achieve rotary water cooling, ensuring that each side of the drill rod is cooled evenly. At the same time, the vibration device can knock off the oxide scale generated by high temperature and cooling, ensuring that the drill rod does not require subsequent cleaning after cooling, thus facilitating the subsequent transfer of the drill rod by the operator. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of an automatic quenching machine for heat treatment of drill rods proposed in this invention;

[0022] Figure 2 This is a schematic diagram of the conveying mechanism of an automatic quenching machine for heat treatment of drill rods proposed in this invention;

[0023] Figure 3 This is a schematic diagram of the water cooling device structure of an automatic quenching machine for heat treatment of drill rods proposed in this invention;

[0024] Figure 4 This is a schematic diagram showing the position and structure of the induction coil and water cooling device of an automatic quenching machine for heat treatment of drill rods proposed in this invention.

[0025] Figure 5This is a schematic diagram of the rotating wheel structure of an automatic quenching machine for heat treatment of drill rods proposed in this invention;

[0026] Figure 6 This is a schematic diagram of the impact device structure of an automatic quenching machine for heat treatment of drill rods proposed in this invention.

[0027] Figure 7 This is a schematic diagram of the circulation component structure of an automatic quenching machine for heat treatment of drill rods proposed in this invention.

[0028] In the diagram: 1. Storage rack; 2. Feeding rack; 3. Conveying mechanism; 31. Drive motor; 32. Drive wheel; 33. Transmission wheel; 34. Driven wheel; 35. Roller; 4. Water tank; 5. Quenching assembly; 501. Connecting box; 502. Water inlet pipe; 503. Water wheel; 504. Blade; 505. Water inlet; 506. Large gear; 507. Rotating wheel; 508. Collar; 509. Spray nozzle; 510. 511. Suction pipe; 512. Matching gear; 513. Power shaft; 514. Fan blade; 515. Air outlet pipe; 516. Fixing box; 517. Impact rod; 518. Tension spring; 519. Connecting shaft; 520. Impact wheel; 521. Sliding board; 6. Circulation assembly; 601. Water tank; 602. Drainage pipe; 603. Refrigeration unit; 604. Return water tank; 605. Connecting pipe; 7. Induction coil. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and 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.

[0030] Please see Figures 1-7 An automatic quenching machine for heat treatment of drill rods includes a storage rack 1 for placing drill rods to be quenched; a feeding rack 2 and a conveying mechanism 3 for conveying the drill rods to be quenched; and a quenching assembly 5 for performing stable quenching on the drill rods. The quenching assembly 5 includes an induction coil 7 and a water cooling assembly. The drill rod is slowly conveyed by the conveying mechanism 3 and moved into the induction coil 7 for high-frequency heating, and then rapidly water-cooled by the water cooling assembly. The feeding rack 2 is provided on the conveying mechanism 3, and two sets of feeding racks 2 are provided, with a water tank 4 between the two sets of feeding racks 2. A control cabinet is provided on the water tank 4, and the control cabinet is electrically connected to the induction coil 7.

[0031] In this embodiment, the conveying mechanism 3 includes a drive motor 31, which is mounted on the feeding frame 2. A drive wheel 32 is fixedly connected to the output end of the drive motor 31. A transmission wheel 33 is connected to the surface of the drive wheel 32 via a toothed belt. A roller 35 is connected to the transmission wheel 33 via a shaft, and a transmission device is provided on the roller 35. The drive motor 31 drives the drive wheel 32 to rotate, which in turn drives the roller 35 to rotate via the toothed belt. Therefore, the chisel located on the roller 35 will be conveyed by rolling.

[0032] Furthermore, multiple rollers 35 are provided, and these rollers 35 are rotatably connected to the feeding frame 2. The transmission device includes two driven wheels 34, which are respectively mounted on two rollers 35 and connected by a toothed belt drive. Utilizing the interlocking transmission devices on each roller 35, multiple rollers 35 will rotate synchronously. Therefore, when the weight of the chisel is placed on the rollers 35, it will be stably conveyed as the rollers 35 rotate.

[0033] In addition, the water cooling assembly includes a connecting box 501, on which a water inlet pipe 502 is connected. The water inlet pipe 502 is connected to a water tank 4, which contains cooling water. The water inlet pipe 502 has an inlet 505, and the connecting box 501 has a collar 508 with spray nozzles 509 on its surface. The cooling water inside the water tank 4 flows in through the water inlet pipe 502, then enters the connecting box 501 through the inlet 505, and is then led out through the multiple spray nozzles 509, thereby cooling the heated drill rod and achieving the quenching process.

[0034] In addition, a rotating device is included, comprising a water wheel 503 rotatably connected to the water inlet pipe 502 via a shaft. The surface of the water wheel 503 is provided with blades 504, and large gears 506 are connected to both sides of the water wheel 503 via shafts. A rotating wheel 507 meshes with the surface of the large gears 506, and the rotating wheel 507 is connected to a collar 508. To ensure uniform water cooling, a rotating device is incorporated. As water flows through the water inlet pipe 502, it drives the blades 504 and the water wheel 503 to rotate synchronously, which in turn drives the two large gears 506 to rotate. The meshing of the gears drives the rotating wheel 507 to rotate, which in turn drives the collar 508 to rotate. Therefore, when the cooling water flows through, it rotates and is evenly distributed across the surface of the drill rod for comprehensive water cooling without any omissions, ensuring consistency in the quenching process.

[0035] It is worth noting that the device also includes a smoking device, which includes a mating gear 511. The surface of the mating gear 511 meshes with the large gear 506. The mating gear 511 is connected to a power shaft 512 via a shaft. The surface of the power shaft 512 is rotatably connected to a fixed box 515, which is fixed on the connecting box 501. The power shaft 512 is located inside the fixed box 515 and has a fan blade 513. A suction pipe 510 is connected to the right side of the fixed box 515, and an air outlet pipe 514 is connected to the surface of the fixed box 515. Considering that water vapor will be generated during high-temperature water cooling, which may obstruct the cooling area and cause steam to adhere to the surface of the drill rod, a smoke extraction device is installed. When the large gear 506 rotates, it will drive the mating gear 511 to rotate. Then, the mating gear 511 will drive the power shaft 512 to rotate, which in turn drives the fan blade 513 to rotate. At this time, the rotation of the fan blade 513 will generate a certain suction force, which acts on the end of the suction pipe 510. Therefore, the smoke and water vapor will be drawn into the interior of the fixed box 515 and then discharged from the exhaust pipe 514, thereby achieving smoke adsorption in the cooling area.

[0036] It is worth noting that a shock device is also included, used to knock off the oxide scale on the surface of the drill rod after cooling. The shock device includes a striking rod 516, to which a connecting shaft 518 is fixedly connected. The connecting shaft 518 is rotatably connected to the connecting box 501. A hook is provided on the surface of the connecting shaft 518, and a tension spring 517 is connected to the hook. The top of the tension spring 517 is connected to the water tank 4. A pusher 520 is connected to the side of the rotating wheel 507 near the striking rod 516, and a sliding plate 521 is connected to the side of the striking rod 516 near the rotating wheel 507. Considering that an oxide scale will be generated on the surface after water cooling at high temperature, the operator needs to... Cleaning is inconvenient, so a shock device is installed. When the rotating wheel 507 rotates, it will synchronously drive the pusher 520 to rotate. The pusher 520 will come into contact with the slide plate 521 along its rotation path, thereby driving the impact rod 516 to rotate around the center of the connecting shaft 518. Then the connecting shaft 518 will rotate accordingly. At this time, the hook will stretch the tension spring 517 in the opposite direction. After the pusher 520 rotates and disengages from the slide plate 521, the instantaneous elastic force of the tension spring 517 will pull the connecting shaft 518 and the impact rod 516 to eject them instantaneously, thereby striking the impact wheel 519 against the chisel, realizing the striking operation. The end face of the impact rod 516 is rotatably connected to the impact wheel 519. There are three pushers 520, and the three pushers 520 are arranged in a circular array with the center of the rotating wheel 507 as the center point. Multiple settings for the 520 promotion change the impact frequency of the ram 516. Setting one means that the rotating wheel 507 rotates once and causes the ram 516 to strike once, while setting three means that the rotating wheel 507 rotates once and causes the ram 516 to strike three times.

[0037] It is worth mentioning that the circulation component 6 includes a water tank 601, which is located below the quenching component 5. A drain pipe 602 is connected to the bottom of the water tank 601, and a chiller 603 is connected to the bottom of the drain pipe 602. A return water tank 604 is connected to one side of the chiller 603 via a pipe. The return water tank 604 is connected to the water tank 4 via a connecting pipe 605, and a water pump is installed inside the return water tank 604. During the entire cooling process, water flows into the water tank 601, enters the chiller 603 through the drain pipe 602, and is further cooled by the chiller 603 before flowing into the return water tank 604. Finally, the water pump injects the cooling water into the water tank 4 through the connecting pipe 605. The cooling water circulation is achieved, thereby saving water resources. The function of the chiller 603 is to cool the cooling water again after quenching. Because the temperature of the cooling water will rise after contacting the drill bit, the chiller 603 needs to cool the returning cooling water. Ice blocks can be placed inside, or some existing refrigeration equipment can be used to cool the water directly. The specific choice can be made according to the user's needs.

[0038] All electrical components mentioned in this article are connected to an external main controller and 380V AC mains power, and the main controller can be a conventional known device such as a computer that provides control.

[0039] The working principle is as follows: First, the operator needs to transfer all the quenched drill rods to the storage rack 1. Then, the first drill rod is lifted by a crane and placed between multiple rollers 35. Then, the drive motor 31 is started, which will drive the drive wheel 32 to rotate. In turn, the toothed belt drives the rollers 35 to rotate. The toothed belt drive can be of various forms, such as belts or chains. Then, the interlocking transmission devices on each roller 35 will drive multiple rollers 35 to rotate synchronously. Therefore, when the weight of the drill rod is placed on the rollers 35, it will be stably conveyed as the rollers 35 rotate. As the drill rod is gradually conveyed to the position of the induction coil 7, it will be heated at high frequency through magnetic induction, causing it to heat up rapidly. After heating, it will enter the interior of the connecting box 501 as it is conveyed. Cooling water from the water tank 4 will then flow in through the inlet pipe 502, enter the connecting box 501 through the inlet 505, and be led out through multiple spray nozzles 509, thereby water-cooling the heated drill rod and achieving the quenching process. To ensure even water cooling, a rotating device is incorporated. As the water flows through the inlet pipe 502, it drives the blades 504 and water wheel 503 to rotate synchronously, which in turn drives two large gears 506. The meshing of these gears drives the rotating wheel 507 to rotate, which in turn drives the collar 508 to rotate. Therefore, the cooling water is evenly distributed across the surface of the drill rod during flow, ensuring comprehensive water cooling without any omissions and guaranteeing consistency in the quenching process. Furthermore, considering that water cooling at high temperatures will generate some water vapor, which may obstruct the cooling process and cause steam to adhere to the surface of the drill rod, a fume extraction device is installed. When the large gear 506 rotates, it will drive the mating gear 511 to rotate. The mating gear 511 will then drive the power shaft 512 to rotate, which in turn will drive the fan blade 513 to rotate. At this time, the rotation of the fan blade 513 will generate a certain suction force, which will act on the end of the suction pipe 510. Therefore, the smoke and water vapor will be drawn into the interior of the fixed box 515 and then discharged from the exhaust pipe 514. This achieves smoke adsorption in the cooling zone, ensuring the visual visibility of the drill rod during quenching, and is also designed to handle emergency shutdowns of the equipment by operators in special circumstances.Considering that surface oxide scale will form after water cooling at high temperatures, which is inconvenient for operators to clean later, a vibration device is installed. When the rotating wheel 507 rotates, it will simultaneously drive the pusher 520 to rotate. The pusher 520 will come into contact with the slide plate 521 along its rotation path, thereby driving the impact rod 516 to rotate around the center of the connecting shaft 518. Then the connecting shaft 518 will rotate accordingly. Using the hook setting, the tension spring 517 will be stretched in the opposite direction. After the pusher 520 rotates and disengages from the slide plate 521, the instantaneous elasticity of the tension spring 517 will pull the connecting shaft 518 and the impact rod 516 to be ejected instantaneously, thereby causing the impact wheel 519 to strike the chisel rod, realizing the hammering operation. At this time, the oxide scale on the surface of the chisel rod will fall off with the hammering. Therefore, as the rotating wheel 507 continues to rotate, it will continuously generate the power of vibration, realizing uninterrupted hammering and thoroughly cleaning the oxide scale on the surface of the chisel rod. During the entire cooling process, water flows into the water tank 601, enters the refrigerator 603 through the drain pipe 602, and is further cooled by the refrigerator 603 before flowing back into the water tank 604. Then, a water pump pumps the cooling water into the water tank 4 through the connecting pipe 605, thus achieving a circulating flow of cooling water.

[0040] 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.

Claims

1. An automatic quenching machine for heat treatment of drill rods, characterized in that, include Storage rack (1), used to place the drill rods that need to be quenched; Feeding rack(2), Conveying mechanism (3) is used to convey the drill rod that needs to be quenched; Quenching assembly (5) is used to perform stable quenching of the drill rod; The quenching assembly (5) includes an induction coil (7) and a water cooling assembly; The circulation component (6) is used to control the cooling water used in the quenching component (5) by reflux cooling. The drill rod is slowly conveyed by the conveying mechanism (3) and moved into the induction coil (7) for high-frequency heating. Then, the heated drill rod is quickly cooled by the water cooling assembly. The conveying mechanism (3) is provided on the feeding rack (2), which has two sets, and a water tank (4) is provided between the two sets of feeding racks (2). A control cabinet is provided on the water tank (4), and the control cabinet is electrically connected to the induction coil (7).

2. An automatic quenching machine for heat treatment of drill rods according to claim 1, characterized in that: The conveying mechanism (3) includes a drive motor (31), which is mounted on the feeding frame (2). The output end of the drive motor (31) is fixedly connected to a drive wheel (32). The surface of the drive wheel (32) is connected to a transmission wheel (33) via a toothed belt. A roller (35) is connected to the transmission wheel (33) via a shaft. A transmission device is provided on the roller (35).

3. An automatic quenching machine for heat treatment of drill rods according to claim 2, characterized in that: The rollers (35) are provided in multiple ways, and the multiple rollers (35) are rotatably connected to the feeding frame (2). The transmission device includes two driven wheels (34), and the two driven wheels (34) are respectively arranged on the two rollers (35). The two driven wheels (34) are connected by a toothed belt drive.

4. An automatic quenching machine for heat treatment of drill rods according to claim 1, characterized in that: The water-cooling assembly includes a connecting box (501), on which a water inlet pipe (502) is connected. The water inlet pipe (502) is connected to a water tank (4). Cooling water is provided inside the water tank (4). A water inlet (505) is provided inside the water inlet pipe (502). A collar (508) is provided inside the connecting box (501). A spray nozzle (509) is provided on the surface of the collar (508).

5. An automatic quenching machine for heat treatment of drill rods according to claim 4, characterized in that: It also includes a rotating device, which includes a water wheel (503) that is rotatably connected to the water inlet pipe (502) via a shaft. The surface of the water wheel (503) is provided with blades (504). Large gears (506) are connected to both sides of the water wheel (503) via shafts. A rotating wheel (507) meshes with the surface of the large gear (506). The rotating wheel (507) is connected to a collar (508).

6. An automatic quenching machine for heat treatment of drill rods according to claim 5, characterized in that: It also includes a smoking device, which includes a mating gear (511) whose surface meshes with a large gear (506). The mating gear (511) is connected to a power shaft (512) via a shaft. A fixed box (515) is rotatably connected to the surface of the power shaft (512). The fixed box (515) is fixed on the connecting box (501). The power shaft (512) is located inside the fixed box (515) and has a fan blade (513). A suction pipe (510) is connected to the right side of the fixed box (515). An air outlet pipe (514) is connected to the surface of the fixed box (515).

7. An automatic quenching machine for heat treatment of drill rods according to claim 6, characterized in that: It also includes a shock device for striking the oxide scale on the surface of the drill rod after cooling. The shock device includes a striking rod (516), a connecting shaft (518) is fixedly connected to the striking rod (516), the connecting shaft (518) is rotatably connected to the connecting box (501), a hook is provided on the surface of the connecting shaft (518), a tension spring (517) is connected to the hook, the top of the tension spring (517) is connected to the water tank (4), a pusher (520) is connected to the side of the rotating wheel (507) near the striking rod (516), and a sliding plate (521) is connected to the side of the striking rod (516) near the rotating wheel (507).

8. An automatic quenching machine for heat treatment of drill rods according to claim 7, characterized in that: The end face of the impact rod (516) is rotatably connected to the impact wheel (519), and three pushers (520) are provided, and the three pushers (520) are arranged in a circular array with the center of the rotating wheel (507) as the center point.

9. An automatic quenching machine for heat treatment of drill rods according to claim 1, characterized in that: The circulation component (6) includes a water tank (601) located below the quenching component (5). A drain pipe (602) is connected to the bottom of the water tank (601), and a chiller (603) is connected to the bottom of the drain pipe (602). A return water tank (604) is connected to one side of the chiller (603) via a pipe. The return water tank (604) is connected to the water tank (4) via a connecting pipe (605). A water pump is installed inside the return water tank (604).

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