A heat treatment furnace with a constant temperature quenching tank

Abstract

The application discloses a heat treatment furnace with a constant-temperature quenching pool, and belongs to the technical field of metal heat treatment, which comprises a furnace body installed on a base, a heating assembly is arranged on the furnace body, a furnace door is installed on the outlet end of the furnace body through a lifting mechanism, a material table is arranged in the furnace body, a feeding and discharging unit is installed on one side of the upper surface of the base, a quenching unit is assembled on the middle of the upper surface of the base through an installation groove, the quenching unit comprises a pool, and two water storage assemblies are installed in the pool; the quenching unit is arranged to solve the problem of the time sequence difference of the up-and-down water entering, realize synchronous cooling of workpieces, and avoid deformation, cracking and uneven hardness; by controlling the two upper water storage tanks to be close to each other and to be suspended above the workpieces, and by controlling the bottom sealing plate and the upper sealing plate to be opened, water injection of the bottom and the upper part of the middle quenching cavity is realized at the same time, the workpieces are synchronously contacted with the cooling water, the disadvantages of the bottom entering water first and the upper part entering water later are solved from the root, and the application is especially suitable for long shafts, slender rods and other easily-deformed workpieces.

Description

Technical Field

[0001] This invention relates to the field of metal heat treatment technology, and in particular to a heat treatment furnace with a constant temperature quenching water tank. Background Technology

[0002] In the heat treatment production of machinery manufacturing, automotive parts, molds and precision structural components, quenching is a key process that determines the hardness, strength, deformation and service life of the workpiece.

[0003] Currently, most commonly used heat treatment equipment adopts a structure that combines a heating furnace with an open quenching water tank. After heating, the high-temperature workpiece is vertically immersed into the quenching water tank from top to bottom by a hoisting or transfer mechanism to complete the cooling.

[0004] In practical applications, this traditional structure has a series of inherent technical defects: First, when the workpiece is vertically immersed in water, the bottom comes into contact with the cooling water first, and the top part enters the water last. There is a significant time difference between the top and bottom parts entering the water, which makes the cooling start time of different parts of the workpiece inconsistent. The bottom cools and contracts first, while the top cools and contracts later, which can easily cause deformation such as bending, warping, and twisting of the workpiece. This problem is particularly prominent for workpieces such as long shafts, long guide rails, and rods with high length-to-diameter ratios. Second, the high-temperature workpiece continues to release heat after entering the water, which makes the water in the upper part of the pool heat up for a longer time and at a higher temperature. This creates a vertical water temperature stratification phenomenon where the top is hot and the bottom is cold. Conventional stirring can only improve the horizontal flow field and cannot eliminate the vertical water temperature difference. This results in a lower cooling rate in the upper part of the workpiece, which can easily lead to problems such as insufficient hardness, soft spots, and incomplete quenching. The hardness gradient between the top and bottom of the workpiece is large, and the overall performance consistency is poor. Summary of the Invention

[0005] The purpose of this invention is to solve the problem that when a workpiece is vertically immersed in water, the bottom comes into contact with the cooling water first, and the top part enters the water last, resulting in a significant time difference between the top and bottom immersion times. Therefore, this invention proposes a heat treatment furnace with a constant temperature quenching water tank.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A heat treatment furnace with a constant temperature quenching water tank includes a furnace body mounted on a base, a heating component on the furnace body, a furnace door mounted on the outlet end of the furnace body via a lifting mechanism, a material platform inside the furnace body, a loading and unloading unit mounted on one side of the upper surface of the base, and a quenching unit mounted in the middle of the upper surface of the base via an opening in the mounting groove. The quenching unit includes a water tank, and two water storage components are installed in the water tank. The water storage component includes a partition installed on the bottom wall of the water tank. A vertical plate is slidably connected to the partition. The water tank cavity is divided from left to right into a left water storage cavity, a middle quenching cavity, and a right water storage cavity via the partition and the vertical plate. After heat treatment, the workpiece is placed in the middle quenching chamber via the upper water tank mounted on one side of the vertical plate, so that the upper part of the workpiece comes into contact with the cooling water. In conjunction with the left and right water tanks, the bottom and top of the workpiece come into contact with the cooling water simultaneously after being placed in the middle quenching chamber.

[0007] As a further description of the above technical solution: The water storage assembly also includes a bottom water injection pipe mounted on the inner top wall of the partition. Bottom water outlet grooves connected to the bottom water injection pipe are opened on the inner bottom walls of the left and right water storage chambers. A bottom sealing plate is inserted into the bottom water injection pipe. A second electric hydraulic rod with one end connected to the bottom sealing plate is mounted on one side wall of the partition.

[0008] As a further description of the above technical solution: The water storage assembly also includes an upper sealing plate that is slidably installed on the bottom wall of the upper water storage tank, and a through groove corresponding to the upper sealing plate is opened at the bottom of one side wall of the upper water storage tank on the right side. An upper water outlet groove is provided in the middle of the bottom wall of the upper water storage tank. Positioning plates are fixed on both upper sealing plates. A third electric hydraulic rod is installed on one side wall of one of the vertical plates, and a push plate is installed at one end of the third electric hydraulic rod.

[0009] As a further description of the above technical solution: One side of the positioning plate is equipped with a telescopic component that is connected to the inner wall of the upper water tank. The telescopic component includes a fixed rod that is connected to the inner wall of the upper water tank. A first movable rod is slidably connected inside the fixed rod. A second movable rod that is connected to the positioning plate is slidably connected inside the first movable rod. A spring that is connected to the side wall of the second movable rod is installed on one side wall of the fixed rod.

[0010] As a further description of the above technical solution: Limiting rods are fixed on one side of the upper water tank on the left and on one side wall of the water pool. The upper sealing plate on the right passes through the through groove and enters the water pool, where it contacts the limiting rods.

[0011] As a further description of the above technical solution: The quenching unit also includes a positive and negative threaded rod mounted on one side of the water tank via a bearing seat. A second motor with its output end connected to one end of the positive and negative threaded rod is mounted on one end of the water tank via a motor frame. A positive threaded moving part and a negative threaded moving part are respectively threaded on both sides of the upper surface of the positive and negative threaded rod. A guide rod is installed on the other side of the pool. One end of the forward threaded moving part and the reverse threaded moving part are slidably sleeved on the guide rod, and the forward threaded moving part and the reverse threaded moving part are respectively connected to two vertical plates.

[0012] As a further description of the above technical solution: A water supply pipe is installed at the bottom of one side of the pool. A first water outlet pipe is installed in both the left and right water storage chambers. A second water outlet pipe is installed on the inner side of both the forward and reverse threaded moving parts. A first solenoid valve is installed at one end of both the first and second water outlet pipes. The first solenoid valve on the first water outlet pipe is connected to the water supply pipe through a water distribution pipe. The first solenoid valve on the second water outlet pipe is connected to the water supply pipe through a flexible hose.

[0013] As a further description of the above technical solution: The bottom of the other side of the pool is equipped with a main drainage pipe, and multiple branch drainage pipes with one end connected to the intermediate quenching chamber are installed on the two main drainage pipes. A second solenoid valve is provided in the middle of the branch drainage pipe.

[0014] As a further description of the above technical solution: The loading and unloading unit includes a track mounted on a base, a base slidably connected to the track, a first motor mounted on the edge of the upper surface of the base, and a traveling wheel adapted to the track mounted on the output end of the first motor.

[0015] As a further description of the above technical solution: A mounting frame is installed in the middle of the upper surface of the base, and an L-shaped receiving frame is slidably installed in the mounting frame. A first electric hydraulic rod with one end connected to the L-shaped receiving frame is installed in the middle of the mounting frame. In particular, the horizontal section of the L-shaped receiving frame is adapted to the material platform and can be inserted into the groove at the bottom of the material platform.

[0016] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: By setting up a quenching unit, the problem of the difference in the timing of water entry from the top and bottom is solved, and the workpiece is cooled synchronously, avoiding deformation, cracking and uneven hardness. By controlling the two upper water tanks to be close together and suspended above the workpiece, and by controlling the opening of the bottom sealing plate and the upper sealing plate, water is injected into the bottom and top of the middle quenching chamber at the same time, so that the workpiece and the cooling water come into contact synchronously. This solves the problem of the bottom entering water first and the top entering water later from the root, and is especially suitable for easily deformable workpieces such as long shafts and slender rods. Meanwhile, by pre-storing cooling water in the water storage chamber and upper water tank, and adopting the "one-time water injection + full drainage after quenching" mode, the waste water that has slightly increased in temperature after quenching is drained in time, avoiding the water temperature accumulation caused by the residual hot water from the previous round, thus solving the problem of the traditional water tank being hot at the top and cold at the bottom. It effectively eliminates the problem of steam film retention on the upper part of the workpiece, improves cooling uniformity and hardenability. By simultaneously injecting water downwards from the upper water tank, it quickly flushes the upper surface of the workpiece, promptly dispersing the newly formed steam film and avoiding defects such as insufficient cooling, soft spots, and incomplete hardening caused by the steam film blocking the cooling water. At the same time, with the shielding effect of the limiting rod and the upper sealing plate on the right side, the steam is discharged only from a single perforation, which is convenient for directional collection and treatment, improves the operating environment, and ensures clear visibility for the operator. Attached Figure Description

[0017] Figure 1 A schematic diagram of a planar structure provided according to an embodiment of the present invention is shown; Figure 2 This diagram shows a partially cut-open structure of the separator provided according to an embodiment of the present invention. Figure 3 This diagram illustrates the position of the upper sealing plate after it has been pushed to the left, according to an embodiment of the present invention. Figure 4 A schematic diagram of the internal structure of the bottom water injection pipe provided according to an embodiment of the present invention is shown; Figure 5 A schematic diagram of the structure of the upper sealing plate provided according to an embodiment of the present invention is shown; Figure 6 A schematic diagram of the installation of a water supply pipe according to an embodiment of the present invention is shown; Figure 7 An installation diagram of a drainage main pipe according to an embodiment of the present invention is shown; Figure 8 This diagram illustrates the position of the L-shaped receiving rack provided according to an embodiment of the present invention as it is moved into the water tank. Figure 9 A schematic diagram of the structure of the loading and unloading unit provided according to an embodiment of the present invention is shown; Figure 10 A three-dimensional structural schematic diagram provided according to an embodiment of the present invention is shown; Figure 11 This diagram shows the upper water outlet trough after it has been opened, according to an embodiment of the present invention. Figure 12 This diagram illustrates the planar structure of an L-shaped receiving rack being moved into a water tank according to an embodiment of the present invention. Figure 13 A schematic diagram of the structure of the upper water storage tank provided according to an embodiment of the present invention is shown.

[0018] Legend: 10. Furnace body; 11. Furnace door; 12. Material platform; 20. Loading / unloading unit; 21. Track; 22. Base; 23. First motor; 24. Traveling wheel; 25. Mounting frame; 26. L-shaped receiving frame; 27. First electro-hydraulic rod; 30. Quenching unit; 31. Water tank; 32. Water storage assembly; 321. Divider; 322. Vertical plate; 323. Bottom water injection pipe; 324. Bottom sealing plate; 325. Second electro-hydraulic rod; 326. Upper water storage tank; 327. Upper sealing plate; 328. Third electro-hydraulic rod; 329. Push plate; 3210. Telescopic component; 33. Limiting rod; 34. Positive and negative threaded rod; 35. Positive threaded moving component; 36. Reverse threaded moving component; 37. Guide rod; 38. Second motor; 39. Water supply pipe; 310. Second water outlet pipe; 311. Drainage main pipe. Detailed Implementation

[0019] 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 of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0020] like Figure 1 - Figure 13 As shown, the present invention provides: A heat treatment furnace with a constant temperature quenching water tank includes a furnace body 10 mounted on a base. The furnace body 10 is equipped with a heating component. In particular, the heating component is a known technology, and its specific structure will not be described in detail here. The outlet end of the furnace body 10 is equipped with a furnace door 11 through a lifting mechanism. The furnace body 10 is equipped with a material platform 12. In particular, the lifting mechanism is a known technology, and its function is to control the opening and closing of the furnace door 11 when picking up and putting down the material platform 12. Its specific structure will not be described in detail here. A loading and unloading unit 20 is installed on one side of the upper surface of the base. The loading and unloading unit 20 includes a track 21 installed on the base. A base 22 is slidably connected to the track 21. A first motor 23 is installed at the edge of the upper surface of the base 22. A walking wheel 24 adapted to the track 21 is installed at the output end of the first motor 23. A mounting bracket 25 is installed in the middle of the upper surface of the base 22. An L-shaped receiving bracket 26 is slidably installed in the mounting bracket 25. A first electric hydraulic rod 27 with one end connected to the L-shaped receiving bracket 26 is installed in the middle of the mounting bracket 25. In particular, the horizontal section of the L-shaped receiving bracket 26 is adapted to the material platform 12 and can be inserted into the bottom groove of the material platform 12. Specifically, after the material platform 12 containing the workpiece to be heat-treated is transferred to the L-shaped receiving rack 26, the first motor 23 is started to control the walking wheels 24 to rotate, thereby driving the base 22 to move the L-shaped receiving rack 26 into the furnace body 10. When the material platform 12 is completely inside the furnace body 10, the first electric hydraulic rod 27 is started to control the L-shaped receiving rack 26 to move downward, so that the bottom of the material platform 12 contacts the bottom wall of the furnace body 10. Then the base 22 is reset backward. After reset, the furnace door 11 is lowered by the lifting mechanism to close the furnace body 10. At this time, the heating component is used to raise the temperature inside the furnace body 10 to heat-treat the workpiece.

[0021] like Figure 2 , Figure 3 , Figure 5 and Figure 13 As shown, in order to quench the workpiece after the heat treatment of the furnace body 10, a quenching unit 30 is installed in the middle of the upper surface of the base by opening an installation slot. The quenching unit 30 includes a water tank 31, and two water storage components 32 are installed in the water tank 31. The water storage assembly 32 includes a partition 321 installed on the bottom wall of the water tank 31. A vertical plate 322 is slidably connected to the partition 321. A first limiting groove is provided on the upper surface of the partition 321. A first limiting slider that matches the first limiting groove is fixed at the bottom of the vertical plate 322. At the same time, a first sealing gasket is provided on the outer wall of the first limiting slider, the bottom of the vertical plate 322, and both ends to ensure the sealing between the vertical plate 322 and the water tank 31 and the partition 321. The inner cavity of the water tank 31 is divided from left to right into a left water storage cavity, a middle quenching cavity, and a right water storage cavity through the partition 321 and the vertical plate 322. After heat treatment, the workpiece is placed in the intermediate quenching chamber via the upper water tank 326 mounted on one side of the vertical plate 322. The upper part of the workpiece then comes into contact with the cooling water. The left and right water tanks work together to ensure that the bottom and top of the workpiece come into contact with the cooling water simultaneously after it is placed in the intermediate quenching chamber. It should be noted that there is a gap between one side wall of the upper water tank 326 on the left and one side wall of the water tank 31. The width of this gap is greater than the width of the vertical section of the L-shaped receiving rack 26. This gap ensures that after the L-shaped receiving rack 26 moves the material platform 12 down to the bottom of the intermediate quenching chamber, it will not affect the subsequent movement of the upper water tank 326 on the left to the right. The side wall of the upper water tank 326 on the right is in contact with the other side wall of the water tank 31. Furthermore, such as Figure 3 and Figure 6As shown, a water supply pipe 39 is installed at the bottom of one side of the water tank 31. A first water outlet pipe is installed in both the left and right water storage chambers. A second water outlet pipe 310 is installed on the inner side of both the forward threaded moving part 35 and the reverse threaded moving part 36. A first solenoid valve is installed at one end of both the first and second water outlet pipes 310. The first solenoid valve on the first water outlet pipe is connected to the water supply pipe 39 through a water distribution pipe. The first solenoid valve on the second water outlet pipe 310 is connected to the water supply pipe 39 through a hose. Preferably, one end of the water supply pipe 39 is connected to a submersible pump, and the submersible pump is installed in an underground well (not shown in the figure). Specifically, the first water outlet pipe is equipped with a first water outlet head for sending water into the water storage chamber, and the two second water outlet pipes 310 are equipped with second water outlet heads corresponding to the two upper water storage tanks 326 respectively. Specifically, before quenching, water from the underground well is pumped into the water delivery pipe 39 by a submersible pump, and sufficient water for quenching the workpiece is delivered to the water storage chamber and the water storage tank through the first water outlet pipe and the second water outlet pipe 310. At the same time, the hose is designed to move with the moving part without obstructing the displacement of the moving part.

[0022] Furthermore, such as Figure 2 , Figure 4 , Figure 5 and Figure 12 As shown, the water storage assembly 32 also includes a bottom water inlet pipe 323 mounted on the inner top wall of the partition 321. Bottom water outlet grooves connected to the bottom water inlet pipe 323 are provided on the inner bottom walls of both the left and right water storage chambers. A bottom sealing plate 324 is inserted into the bottom water inlet pipe 323. A second electro-hydraulic rod 325, with one end connected to the bottom sealing plate 324, is mounted on one side wall of the partition 321. Specifically, in the initial state, the vertical plate 322, together with the upper water tank 326 fixed to one side, is positioned near both ends of the water pool 31. Figure 1 As shown, in this state, there is no water in the middle quenching chamber, while the left water storage chamber, the right water storage chamber, and the upper water storage tank 326 are filled with cooling water. At the same time, the bottom water injection pipe 323, which is connected to the bottom water storage tank, is blocked by the bottom sealing plate 324. In order to prevent water from leaking from the gap, the outer surface of the bottom sealing plate 324 is provided with a third sealing gasket. It should be noted that the outlet end of the bottom water injection pipe 323 is located at the bottom of one side wall of the middle quenching chamber. Specifically, when it is necessary to inject water into the bottom of the intermediate quenching chamber, the two second electric hydraulic rods 325 are activated to pull the bottom sealing plate 324 to one side, thereby releasing the seal. At this time, the water in the two water storage chambers can enter the bottom water injection pipe 323 through the bottom water storage tank and be injected into the bottom of the intermediate quenching chamber through the outlet. The water storage assembly 32 also includes an upper sealing plate 327 slidably installed on the inner bottom wall of the upper water storage tank 326. A second limiting groove is provided on the inner bottom wall of the upper water storage tank 326. A second limiting slider adapted to the second limiting groove is fixed on one side of the lower surface of the upper sealing plate 327. The outer surface of the second limiting slider, the lower surface of the upper sealing plate 327, and both sides are provided with second sealing gaskets to ensure the sealing between the upper sealing plate 327 and the inner wall of the upper water storage tank 326. A through groove corresponding to the upper sealing plate 327 is provided at the bottom of one side wall of the upper water storage tank 326 on the right side. In particular, one end of the upper sealing plate 327 in the upper water storage tank 326 on the right side is inserted into the through groove. At the same time, a third sealing gasket is provided on the inner wall of the through groove to ensure the sealing between the upper sealing plate 327 and the through groove. An upper water outlet groove is provided in the middle of the bottom wall of the upper water tank 326. Positioning plates are fixed on both upper sealing plates 327. A third electric hydraulic rod 328 is installed on one side wall of one of the vertical plates 322. A push plate 329 is installed at one end of the third electric hydraulic rod 328. In particular, the third electric hydraulic rod 328 is located on the right vertical plate 322. In the initial state, the push plate 329 is in contact with the positioning plate in the upper water tank 326 on the right side. Specifically, when water needs to be injected from the upper part of the intermediate quenching chamber, the two upper water tanks 326 are first brought closer together. At this time, the push plate 329 will also contact another positioning plate. Then, the third electric hydraulic rod 328 is activated to drive the push plate 329 to move from right to left. The push plate 329 will simultaneously push the two positioning plates to drive the two upper sealing plates 327 to move from right to left, thereby opening the upper water outlet. At this time, the water in the two upper water tanks 326 is injected into the intermediate quenching chamber through the upper water outlet. Together with the two water tanks, water is injected into the bottom of the intermediate quenching chamber, so that the cooling water can simultaneously wrap around the workpiece in the quenching chamber. A telescopic component 3210 is fitted on one side of the positioning plate, with one end connected to the inner wall of the upper water tank 326. The telescopic component 3210 includes a fixed rod connected to the inner wall of the upper water tank 326, a first movable rod slidably connected inside the fixed rod, and a second movable rod slidably connected inside the first movable rod, with one end connected to the positioning plate. A spring is installed on one side wall of the fixed rod, with one end connected to the side wall of the second movable rod. Specifically, in the initial state, the telescopic component 3210 inside the upper water tank 326 on the right side is in a retracted state, while the spring inside is in a free state. In the initial state, the telescopic component 3210 inside the upper water tank 326 on the left is in the extended state, but the spring inside is also in the natural state. It should be noted that in the initial state, the upper sealing plate 327 inside the upper water tank 326 on the right is on the left, and the upper sealing plate 327 inside the upper water tank 326 on the right is on the right. At the same time, the upper water outlet grooves on the bottom walls of the two water tanks are also located on the left and right sides respectively. In this state, when the two water tanks are close together, the upper water outlet grooves in the two tanks will be on the same straight line. In this state, when the push plate 329 is moved to the left by the third electric hydraulic rod 328, the telescopic component 3210 in the upper water tank 326 on the right side gradually unfolds, and the spring inside is stretched. At the same time, the telescopic component 3210 in the upper water tank 326 on the left side gradually retracts, and the spring inside is compressed. The upper sealing plates 327 in both tanks also move to the left at the same time, thereby opening the two upper water outlets simultaneously and sending water downwards. After the water is sent, the third electric hydraulic rod 328 drives the push plate 329 to gradually return to its original position, and the upper sealing plates 327 in both tanks also gradually return to their original position under the action of the springs.

[0023] Furthermore, such as Figure 1 , Figure 3 , Figure 6 and Figure 11 As shown, the quenching unit 30 also includes a positive and negative threaded rod 34 mounted on one side of the water tank 31 via a bearing seat. A second motor 38 with its output end connected to one end of the positive and negative threaded rod 34 is mounted on one end of the water tank 31 via a motor frame. A positive threaded moving part 35 and a negative threaded moving part 36 are respectively threaded on both sides of the upper surface of the positive and negative threaded rod 34. A guide rod 37 is installed on the other side of the pool 31. One end of the forward threaded moving part 35 and the reverse threaded moving part 36 are slidably sleeved on the guide rod 37, and the forward threaded moving part 35 and the reverse threaded moving part 36 are respectively connected to two vertical plates 322. Specifically, after the workpiece heat treatment is completed, the furnace door 11 is raised by the lifting mechanism to open the furnace body 10. At this time, the base 22 is controlled to move the L-shaped receiving rack 26 into the furnace body 10 until the L-shaped receiving rack 26 is inserted into the bottom groove of the material platform 12. Then, the first electric hydraulic rod 27 is activated to control the L-shaped receiving rack 26 to move the material platform 12 upward, so that it is no longer in contact with the bottom wall of the furnace body 10. Then, the first motor 23 controls the base 22, together with the L-shaped receiving rack 26 and the material platform 12, to move backward to above the water tank 31 (it needs to be moved to the position where the vertical section of the L-shaped receiving rack 26 is close to the inner wall of the water tank 31). Then, the first electric hydraulic rod 27 is activated to control the L-shaped receiving rack 26 to move the material platform 12 downward into the intermediate quenching chamber (it only needs to be moved until the bottom of the L-shaped receiving rack 26 is in contact with the bottom wall of the intermediate quenching chamber, or slightly higher than the bottom wall of the intermediate quenching chamber). When the L-shaped receiving rack 26 moves the material platform 12 downward into the intermediate quenching chamber, the second motor 38 is started to control the rotation of the positive and negative threaded rods 34, which in turn causes the positive thread moving part 35 and the negative thread moving part 36 to move the two vertical plates 322 closer together, gradually bringing the two upper water tanks 326 closer together and above the material platform 12. At this time, the second electric hydraulic rod 325 and the third electric hydraulic rod 328 are activated simultaneously to control the bottom sealing plate 324 and the upper sealing plate 327 to release the blockage of the bottom water outlet and the upper water outlet, so that water can be injected from the upper and bottom of the quenching chamber at the same time. This allows the entire surface of the workpiece to come into contact with the cooling water almost simultaneously, solving the problem of the difference in the timing of the upper and lower parts of the workpiece entering the water and the stratification of the water temperature in the pool caused by the traditional vertical immersion method. This achieves the synchronization and uniformity of the entire quenching and cooling process, and avoids the situation in the vertical immersion method where the upper part of the workpiece is already hot when it enters the water due to late entry, and the upper part of the workpiece is continuously wrapped by a steam film when it is not in the water. After quenching, the upper water tank 326 is reset, and then the L-shaped receiving rack 26 is driven by the first electric hydraulic rod 27 to move the material platform 12 and the quenched workpiece upward to get them out of the cooling water. Then the material platform 12 is removed, and the material platform 12 with the next workpiece is placed on the L-shaped receiving rack 26 and sent into the furnace body 10. The above operation is repeated.

[0024] At the same time, such as Figure 3 , Figure 5 and Figure 11 As shown, in order to prevent the steam generated during the quenching process from scattering, limit rods 33 are fixed on one side of the upper water tank 326 on the left and on one side wall of the water pool 31. The upper sealing plate 327 on the right passes through the through groove and enters the water pool 31 and then contacts the limit rods 33. Specifically, when the upper water outlet is opened, the upper sealing plate 327 on the right side will pass through the through slot and be suspended above the middle quenching chamber. One end of the plate is attached to the vertical plate 322 on the opposite side, and both sides are attached to the inner sides of the two limiting rods 33, thus shielding the hollow part on one side of the middle quenching chamber. At this time, the upper part of the middle quenching chamber is partially shielded by the two upper water storage tanks 326 and the upper sealing plate 327. In this state, only the hollow part on the other side is exposed. When water is injected into the middle quenching chamber from the upper and lower parts of the workpiece at the same time, the steam generated after the workpiece surface comes into contact with the water can only move outward through this hollow part. This makes it convenient for personnel to collect and process the steam in a directional manner, preventing the steam from spreading.

[0025] Finally, as Figure 7 As shown, in order to drain the wastewater used for one quenching, a drainage main pipe 311 is installed at the bottom of the other side of the water tank 31. Multiple drainage branch pipes with one end connected to the intermediate quenching chamber are installed on the two drainage main pipes 311, and a second solenoid valve is provided in the middle of the drainage branch pipe. Specifically, after a workpiece is quenched and removed from the cavity, the second solenoid valve is opened. At this time, the wastewater in the intermediate quenching cavity is drained into the main drain pipe 311 through the drain branch pipe, so that there is no residual hot water from the previous round in the intermediate quenching cavity before the next quenching, and no water temperature accumulation. The drained water can be centrally treated and recycled. After the drainage is completed, the second solenoid valve is closed. During the drainage process, water can be sent to the water storage cavity and water storage tank at the same time, or water can be sent before the heat treatment of the workpiece is completed.

[0026] Specifically, this heat treatment furnace equipped with a constant temperature quenching water tank operates / is used as follows: 1. Preliminary preparation: The submersible pump injects cooling water into the water storage chamber and the upper water storage tank 326 through the water supply pipe 39, the first water outlet pipe, and the second water outlet pipe 310; check the initial state of the components to ensure that each sealing plate, solenoid valve, furnace door 11, and L-shaped receiving rack 26 are in the preset position; 2. Loading the workpiece: Place the material platform 12 onto the L-shaped receiving rack 26. The first motor 23 drives the base 22 to move, sending the material platform 12 into the furnace body 10. The first electric hydraulic rod 27 controls the L-shaped receiving rack 26 to descend. After the base 22 is reset, the lifting mechanism closes the furnace door 11. 3. Workpiece heating: Start the furnace body heating component 10 and heat the workpiece to the preset temperature according to the conventional process; 4. Workpiece transfer: After heating is completed, the lifting mechanism opens the furnace door 11, the L-shaped receiving rack 26 is inserted into the bottom of the material platform 12, the first electric hydraulic rod 27 drives the material platform 12 to rise, and the base 22 transfers it to the top of the intermediate quenching chamber. 5. Synchronous quenching: The L-shaped receiving rack 26 drives the material platform 12 to descend to the middle quenching chamber; the second motor 38 drives the vertical plate 322 and the upper water tank 326 to approach; the second and third electric hydraulic rods are started simultaneously to open the bottom and upper sealing plates, and water is injected from the top and bottom simultaneously for quenching for 3 to 20 seconds; 6. Reset and drain: Turn off the electric hydraulic rod and reset the sealing plate; reset the vertical plate 322 and the upper water tank 326; the L-shaped receiving rack 26 drives the material platform 12 to rise and move to the material picking position to pick up the workpiece; 7. Cyclic operation: Open the second solenoid valve, drain the wastewater through the main drain pipe 311, and then close it; replenish the cooling water, place the next batch of material platform 12, and repeat the above steps.

[0027] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A heat treatment furnace with a constant temperature quenching water tank, comprising a furnace body (10) mounted on a base, wherein a heating assembly is provided on the furnace body (10), a furnace door (11) is installed at the outlet end of the furnace body (10) via a lifting mechanism, a material platform (12) is provided inside the furnace body (10), and a loading and unloading unit (20) is installed on one side of the upper surface of the base, characterized in that, A quenching unit (30) is assembled in the middle of the upper surface of the base by opening an installation slot. The quenching unit (30) includes a water tank (31) and two water storage components (32) are installed in the water tank (31). The water storage component (32) includes a partition (321) installed on the bottom wall of the water tank (31), and a vertical plate (322) is slidably connected on the partition (321). The inner cavity of the water tank (31) is divided from left to right into a left water storage cavity, a middle quenching cavity and a right water storage cavity by the partition (321) and the vertical plate (322). After heat treatment, the workpiece is placed in the middle quenching chamber via the upper water tank (326) mounted on one side of the vertical plate (322), so that the upper part of the workpiece comes into contact with the cooling water. In conjunction with the left and right water tanks, the bottom and top of the workpiece come into contact with the cooling water simultaneously after being placed in the middle quenching chamber.

2. The heat treatment furnace with a constant temperature quenching water tank according to claim 1, characterized in that, The water storage component (32) also includes a bottom water injection pipe (323) mounted on the inner top wall of the partition (321). The bottom bottom walls of the left and right water storage chambers are provided with bottom water outlet grooves that are connected to the bottom water injection pipe (323). A bottom sealing plate (324) is inserted into the bottom water injection pipe (323). A second electric hydraulic rod (325) with one end connected to the bottom sealing plate (324) is mounted on one side wall of the partition (321).

3. A heat treatment furnace with a constant-temperature quenching water tank according to claim 2, characterized in that, The water storage component (32) also includes an upper sealing plate (327) that is slidably installed on the bottom wall of the upper water storage tank (326), and a through groove corresponding to the upper sealing plate (327) is provided at the bottom of one side wall of the upper water storage tank (326) on the right side. The upper water tank (326) has an upper water outlet groove in the middle of the bottom wall. Both upper sealing plates (327) are fixed with positioning plates. One of the vertical plates (322) has a third electric hydraulic rod (328) installed on one side wall. One end of the third electric hydraulic rod (328) is equipped with a push plate (329).

4. A heat treatment furnace with a constant-temperature quenching water tank according to claim 3, characterized in that, One side of the positioning plate is fitted with a telescopic member (3210) whose end is connected to the inner wall of the upper water tank (326). The telescopic member (3210) includes a fixed rod connected to the inner wall of the upper water tank (326). A first moving rod is slidably connected inside the fixed rod. A second moving rod whose end is connected to the positioning plate is slidably connected inside the first moving rod. A spring whose end is connected to the side wall of the second moving rod is installed on one side wall of the fixed rod.

5. A heat treatment furnace with a constant-temperature quenching water tank according to claim 4, characterized in that, Limiting rods (33) are fixed on one side of the upper water tank (326) on the left and on one side wall of the pool (31). The upper sealing plate (327) on the right passes through the through groove and enters the pool (31) and then contacts the limiting rods (33).

6. A heat treatment furnace with a constant-temperature quenching water tank according to claim 5, characterized in that, The quenching unit (30) also includes a positive and negative threaded rod (34) mounted on one side of the water tank (31) via a bearing seat. A second motor (38) with its output end connected to one end of the positive and negative threaded rod (34) is mounted on one end of the water tank (31) via a motor frame. A positive threaded moving part (35) and a negative threaded moving part (36) are respectively threaded on both sides of the upper surface of the positive and negative threaded rod (34). A guide rod (37) is installed on the other side of the pool (31). One end of the forward threaded moving part (35) and the reverse threaded moving part (36) are slidably sleeved on the guide rod (37), and the forward threaded moving part (35) and the reverse threaded moving part (36) are respectively connected to two vertical plates (322).

7. A heat treatment furnace with a constant-temperature quenching water tank according to claim 6, characterized in that, A water supply pipe (39) is installed at the bottom of one side of the water tank (31). A first water outlet pipe is installed in both the left and right water storage chambers. A second water outlet pipe (310) is installed on the inner side of both the forward threaded moving part (35) and the reverse threaded moving part (36). A first solenoid valve is installed at one end of both the first and second water outlet pipes (310). The first solenoid valve on the first water outlet pipe is connected to the water supply pipe (39) through a water distribution pipe. The first solenoid valve on the second water outlet pipe (310) is connected to the water supply pipe (39) through a flexible hose.

8. A heat treatment furnace with a constant-temperature quenching water tank according to claim 7, characterized in that, The bottom of the other side of the water tank (31) is equipped with a drainage main pipe (311), and multiple drainage branch pipes with one end connected to the intermediate quenching chamber are installed on the two drainage main pipes (311), and a second solenoid valve is provided in the middle of the drainage branch pipe.

9. A heat treatment furnace with a constant-temperature quenching water tank according to claim 1, characterized in that, The loading and unloading unit (20) includes a track (21) mounted on a base, a base (22) slidably connected to the track (21), a first motor (23) mounted on the edge of the upper surface of the base (22), and a traveling wheel (24) adapted to the track (21) mounted on the output end of the first motor (23). The traveling wheel (24) is adapted to the track (21).

10. A heat treatment furnace with a constant-temperature quenching water tank according to claim 9, characterized in that, A mounting bracket (25) is installed in the middle of the upper surface of the base (22). An L-shaped receiving bracket (26) is slidably installed inside the mounting bracket (25). A first electric hydraulic rod (27) with one end connected to the L-shaped receiving bracket (26) is installed in the middle of the mounting bracket (25).

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