A wheel hub heat treatment apparatus

Abstract

The utility model provides a kind of wheel hub heat treatment device, it is related to wheel hub heat treatment technical field, the top of cooling box can be plugged in the process of wheel hub water cooling and then reduce the amount of high-temperature mist steam escaping outward, while plugging in by nitrogen delivery and then significantly reduce the amount of contact oxygen in the process of wheel hub cooling, and then the amount of production of metal oxide skin significantly reduces, in addition, reducing oxygen contact can avoid temperature difference fluctuation caused by steam and local oxidation reaction on metal surface, to reduce the risk of thermal stress crack, at the same time, nitrogen can inhibit steam accumulation, and the cyclone separator and condenser can better handle water vapor, it is not easy to cause the situation that surrounding environment sight is obstructed, and pressure balance can be automatically maintained in the process of plugging cooling, and then the effect of wheel hub heat treatment cooling process is better.

Description

Technical Field

[0001] This utility model relates to the field of wheel hub heat treatment technology, and more specifically, to a wheel hub heat treatment device. Background Technology

[0002] A wheel hub (also known as a rim, steel rim, or tire rim) is a cylindrical metal component that supports the tire from within. It is mounted in the center on the axle and is a key safety component of the vehicle's driving system.

[0003] Currently, after batch heat treatment of wheel hubs in a heat treatment furnace, they need to be transferred using hoisting equipment and immersed in water for cooling. However, the top of the current cooling box is open and directly connected to the outside environment. During the immersion process, the heat-treated wheel hubs release a large amount of steam, which overflows into the surrounding environment. This dense water vapor easily forms localized fog, affecting visibility in the workshop and surrounding areas. Furthermore, the wheel hubs directly contact oxygen during cooling, resulting in a significant amount of metal oxide scale. Therefore, the water cooling process after wheel hub heat treatment needs improvement. Utility Model Content

[0004] The purpose of this invention is to solve the problems mentioned in the background art and to propose a wheel hub heat treatment device.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] A wheel hub heat treatment device includes a cooling box, a rotary lifting assembly, a cover plate, a filter assembly, a nitrogen delivery assembly, a metering pump, an exhaust pipe, an automatic pressure relief valve, a mounting box, a cyclone separator, and a condenser.

[0007] The rotary lifting assembly is mounted on the cooling box, and the rotary lifting assembly is connected to a cover plate that matches the size of the top of the cooling box;

[0008] The filter assembly is installed inside the cooling box;

[0009] The nitrogen delivery assembly and the metering pump are both connected to the interior of the cooling box, and the nitrogen delivery assembly is connected to the bottom area and the top area of ​​the cooling box respectively.

[0010] The exhaust pipe is connected to the cover plate, and an automatic pressure relief valve is installed on the exhaust pipe;

[0011] The mounting box is fixed on the cover plate, and a cyclone separator and a condenser are installed inside the mounting box. The input end of the cyclone separator is connected to the exhaust pipe, and the condenser is connected to the output end of the cyclone separator.

[0012] Furthermore, the rotary lifting assembly includes a connecting roller, a servo gear transmission assembly, and a telescopic cylinder.

[0013] One end of the connecting roller is rotatably connected to the cooling box;

[0014] The servo gear transmission assembly is mounted on the cooling box and connected to the connecting roller;

[0015] The telescopic cylinder is located at the other end of the connecting roller and is connected to a cover plate.

[0016] Furthermore, the filtering assembly includes a limiting plate, a filter element, and a handle.

[0017] The limiting plates are symmetrically fixed inside the cooling box;

[0018] The filter element fits snugly against the inner wall of the cooling box and abuts against the limiting plate;

[0019] The handles are symmetrically arranged on the filter element.

[0020] Furthermore, the nitrogen delivery assembly includes a gas pump, a nitrogen source, a three-way connector, and a delivery pipe.

[0021] The air pump is fixed on the cooling box, and the input end of the air pump is connected to a nitrogen source;

[0022] One of the three-way pipes is connected to the output end of the air pump, and the remaining two pipes of the three-way pipe are connected to the delivery pipes respectively. One delivery pipe is connected to the top area of ​​the cooling box, and the other delivery pipe is connected to the bottom area of ​​the cooling box.

[0023] Furthermore, each of the two conveying pipes is equipped with a one-way valve that allows only inflow and no outflow.

[0024] Furthermore, a drain pipe is connected to the bottom area of ​​the cooling box, and a valve is installed on the drain pipe.

[0025] Furthermore, the cover plate is provided with a rectangular slot, the upper surface of the cooling box is provided with a rectangular plug that is inserted into the rectangular slot, and a sealing gasket is provided in the inner circumference of the rectangular slot.

[0026] Furthermore, the mounting box is provided with a side-opening door and heat dissipation holes.

[0027] Compared with the prior art, the beneficial effects of this utility model are:

[0028] Compared to existing technologies, this application can seal the top of the cooling box during the wheel hub water cooling process, thereby reducing the amount of high-temperature mist escaping. While sealing, nitrogen is delivered to significantly reduce the amount of oxygen contacted during wheel hub cooling, thus significantly reducing the amount of metal oxide scale generated. In addition, reducing oxygen contact can avoid temperature fluctuations caused by local oxidation reactions between steam and the metal surface, thereby reducing the risk of thermal stress cracks. At the same time, nitrogen can inhibit steam accumulation, and when combined with a cyclone separator and condenser, water vapor can be better processed, and it is less likely to obstruct the view of the surrounding environment. Furthermore, pressure balance can be automatically maintained during the sealing cooling process, resulting in a better effect of the wheel hub heat treatment cooling process. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0030] Figure 2 A schematic diagram of the servo gear transmission assembly installation;

[0031] Figure 3 This is a schematic diagram of a rectangular slot;

[0032] Figure label:

[0033] 1. Cooling box; 2. Rotary lifting assembly; 21. Connecting roller; 22. Servo gear transmission assembly; 23. Telescopic cylinder; 3. Cover plate; 4. Filter assembly; 41. Limiting plate; 42. Filter element; 43. Handle; 5. Nitrogen delivery assembly; 51. Air pump; 52. T-connector; 53. Delivery pipe; 54. Check valve; 6. Metering pump; 7. Exhaust pipe; 8. Automatic pressure relief valve; 9. Mounting box; 10. Drain pipe; 11. Valve; 12. Rectangular slot. Detailed Implementation

[0034] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model. The present utility model will be further described with reference to the accompanying drawings and embodiments:

[0035] like Figure 1 and Figure 2 As shown, a wheel hub heat treatment device includes a cooling box 1, a rotary lifting assembly 2, a cover plate 3, a filter assembly 4, a nitrogen delivery assembly 5, a metering pump 6, an exhaust pipe 7, an automatic pressure relief valve 8, a mounting box 9, a cyclone separator, and a condenser.

[0036] The rotary lifting assembly 2 is mounted on the cooling box 1, and the rotary lifting assembly 2 is connected to a cover plate 3 that is adapted to the top size of the cooling box 1;

[0037] Filter assembly 4 is movably installed inside cooling box 1;

[0038] The nitrogen delivery assembly 5 and the metering pump 6 are both connected to the interior of the cooling tank 1, and the nitrogen delivery assembly 5 is connected to the bottom area and the top area of ​​the cooling tank 1 respectively (the water tank is connected to the metering pump 6 and the water tank is not shown in the figure).

[0039] The exhaust pipe 7 is connected to the cover plate 3, and an automatic pressure relief valve 8 is installed on the exhaust pipe 7;

[0040] The mounting box 9 is fixed on the cover plate 3, and a cyclone separator and a condenser are installed inside the mounting box 9. The input end of the cyclone separator is connected to the exhaust pipe 7, and the condenser is connected to the output end of the cyclone separator (neither the cyclone separator nor the condenser is shown in the figure).

[0041] In a further refinement of the above embodiment, the mounting box 9 is provided with a side door and a heat dissipation hole. The side door facilitates the maintenance of the cyclone separator and condenser, and the heat dissipation hole allows both to dissipate heat to the outside during operation (the side door and heat dissipation hole are not shown in the figure).

[0042] Specific implementation of the embodiments of this utility model, such as Figure 1 and Figure 2 As shown, the rotary lifting assembly 2 includes a connecting roller 21, a servo gear transmission assembly 22, and a telescopic cylinder 23.

[0043] One end of the connecting roller 21 is rotatably connected to the cooling box 1;

[0044] The servo gear transmission assembly 22 is mounted on the cooling box 1 and connected to the connecting roller 21 (the servo gear transmission assembly 22 consists of a servo motor, a main gear and a secondary gear, the servo motor is connected to the main gear, and the secondary gear is fixed on the connecting roller and meshes with the main gear).

[0045] The telescopic cylinder 23 is located at the other end of the connecting roller 21 and is connected to the cover plate 3.

[0046] Specific implementation of the embodiments of this utility model, such as Figure 1 As shown, the filter assembly 4 includes a limiting plate 41, a filter element 42, and a handle 43.

[0047] Limiting plates 41 are symmetrically fixed inside the cooling box 1;

[0048] The filter element 42 is attached to the inner wall of the cooling box 1 and abuts against the limiting plate 41;

[0049] Handles 43 are symmetrically arranged on the filter element 42.

[0050] Specific implementation of the embodiments of this utility model, such as Figure 1 and Figure 2 As shown, the nitrogen delivery assembly 5 includes a gas pump 51, a nitrogen source (not shown in the figure), a three-way pipe 52, and a delivery pipe 53.

[0051] The air pump 51 is fixed on the cooling box 1, and the input end of the air pump 51 is connected to a nitrogen source.

[0052] One of the pipes of the three-way pipe 52 is connected to the output end of the air pump 51, and the remaining two pipes of the three-way pipe 52 are connected to the delivery pipe 53 respectively. One delivery pipe 53 is connected to the top area of ​​the cooling box 1, and the other delivery pipe 53 is connected to the bottom area of ​​the cooling box 1.

[0053] In a further optimization of the above embodiment, one-way valves 54 that allow only inflow and no outflow are provided at the ends of both conveying pipes 53 to prevent cooling water from flowing into the conveying pipes.

[0054] Specific implementation of the embodiments of this utility model, such as Figure 1 and Figure 2 As shown, the bottom area of ​​the cooling box 1 is connected to a drain pipe 10, and a valve 11 is installed on the drain pipe 10.

[0055] To further reduce the amount of steam escaping from the joint between the cover plate 3 and the cooling box 1 after sealing the cooling box 1, further optimizations to the above-described embodiment are made, such as... Figure 3 As shown, a rectangular slot 12 is provided on the cover plate 3, and a rectangular plug is provided on the upper surface of the cooling box 1 to be inserted into the rectangular slot 12. A sealing gasket is provided on the inner circumference of the rectangular slot 12 (the sealing gasket and the rectangular plug are not shown in the figure).

[0056] It should be noted that the servo motor, telescopic cylinder 23, air pump 51, metering pump 6, and automatic pressure relief valve 8 in the servo gear transmission assembly 22 are all electrically connected to the controller, which is not labeled in the figure.

[0057] The working process of this utility model:

[0058] Initially, the cover plate 3 does not block the top of the cooling box 1, and the cover plate 3, together with the connecting roller 21, moves away from the top of the cooling box 1 under the action of the servo gear transmission assembly 22, so as not to affect the hoisting and placement of the heat-treated hubs into the cooling box 1 (the servo gear transmission assembly 22 consists of a servo motor, a main gear and a secondary gear, which can realize the accurate horizontal deflection of the cover plate 3 at a fixed angle). After several hubs are placed into the cooling box 1, the controller controls the servo gear transmission assembly 22 to operate, so that the cover plate 3 can move to the top of the cooling box 1 and the two are directly opposite each other. Then the controller controls the telescopic cylinder 23 to operate, so that the cover plate 3 blocks the cooling box 1.

[0059] After sealing is completed, the controller immediately activates the metering pump 6 to inject a fixed volume of cooling water into the cooling tank 1. The water level is pre-set in the controller (the water level is lower than the delivery pipe 53 connecting to the top area of ​​the cooling tank 1). The water level gradually rises and completely covers the hub for cooling, generating steam. Simultaneously, the controller activates the nitrogen delivery assembly 5 to synchronously supply nitrogen to the bottom and top areas of the cooling tank 1. Supplying nitrogen to the bottom area of ​​the cooling tank 1 accelerates bubble bursting and enhances heat exchange efficiency, while supplying nitrogen to the top area of ​​the cooling tank 1 inhibits steam accumulation. It can also reduce the probability of contact with oxygen (reducing oxygen contact can avoid temperature fluctuations caused by local oxidation reaction between steam and metal surface, thereby reducing the risk of thermal stress cracking). It should be noted that the nitrogen concentration must be greater than 95% and the pressure value in the cooling box 1 should be adjusted by the automatic pressure relief valve 8 during the cooling process to ensure the safe operation of the device (the pressure upper limit is set in the automatic pressure relief valve 8 in advance, and the pressure will be automatically released when the pressure exceeds the upper limit. The automatic pressure relief valve 8 is existing technology and no improvement is required. It is only necessary to set the pressure detection upper limit value in advance). At the same time, nitrogen can be introduced during the water cooling process of wheel hub heat treatment to reduce oxygen content and inhibit oxidation.

[0060] The structure of an automatic pressure relief valve includes:

[0061] 1. Main valve

[0062] The diaphragm structure is divided into upper and lower chambers: the lower chamber is the medium flow channel and the upper chamber is the control chamber, which drives the valve to open and close through the pressure difference.

[0063] 2. Pilot valve (operational valve)

[0064] A miniature pressure relief device, comprising a valve body, adjusting screw, spring, diaphragm, and other components, is used to sense system pressure and control the operation of the main valve.

[0065] 3. Pressure regulating component

[0066] Needle valve: Used to regulate and control flow in pipelines;

[0067] Pressure gauge: Displays system pressure in real time.

[0068] During the depressurization process, the gas contains vapor and metal oxide particles. The mixed gas is first passed into a cyclone separator (which is existing technology and will not be improved, and the principle will not be described). The cyclone separator then uses centrifugal force to preferentially separate large water droplets and metal oxides from the vapor, which has good separation efficiency and can reduce the load on the subsequent condenser. The remaining high-temperature vapor is then passed into the condenser for liquefaction and will not be atomized and discharged to the outside, thereby reducing the impact of dense water vapor forming local fog on the workshop environment.

[0069] The structure of a cyclone separator:

[0070] 1. Cylinder body

[0071] Outer cylinder: Cylindrical body, forming a rotating airflow channel;

[0072] Inner cylinder (exhaust pipe): A central vertical pipe used to discharge purified gas;

[0073] 2. Conical segment

[0074] The inverted cone structure accelerates airflow rotation and guides particle settling, with a ash discharge port connected to the bottom.

[0075] 3. Air Intake System

[0076] A tangential or axial air inlet forces the airflow to rotate.

[0077] Once a batch of wheel hubs has cooled down and the pressure inside the cooling tank 1 no longer fluctuates, the telescopic cylinder 23 can be controlled by the controller to release the blockage of the cooling tank 1. The wheel hubs are then removed and cooled by natural air cooling with cooling water. Once the water temperature in the cooling tank 1 returns to the standard range, a new batch of heat-treated wheel hubs can be replaced to begin the next cooling process. As the wheel hubs continue to cool, metal oxide scale will adhere to the filter element 42 (the filter holes of the filter element 42 cannot allow the metal oxide scale to pass through). First, the valve 11 on the drain pipe 10 is opened to drain the cooling water. Then, the filter element 42 is removed by the lifting rod to clean the metal oxide scale. After cleaning the metal oxide scale on the surface of the filter element 42, it is reinstalled back into the cooling tank 1. The above process is then repeated to allow water to flow again and to carry out the cooling process after the heat treatment of the wheel hubs.

[0078] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The descriptions of the above embodiments and specifications are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection claimed by this utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A wheel hub heat treatment device, characterized in that, Includes a cooling box (1), a rotary lifting assembly (2), a cover plate (3), a filter assembly (4), a nitrogen delivery assembly (5), a metering pump (6), an exhaust pipe (7), an automatic pressure relief valve (8), a mounting box (9), a cyclone separator, and a condenser. The rotary lifting assembly (2) is installed on the cooling box (1), and the rotary lifting assembly (2) is connected to a cover plate (3) that is adapted to the top size of the cooling box (1). The filter assembly (4) is movably installed inside the cooling box (1); The nitrogen delivery assembly (5) and the metering pump (6) are both connected to the interior of the cooling box (1), and the nitrogen delivery assembly (5) is connected to the bottom area and the top area of ​​the cooling box (1) respectively. The exhaust pipe (7) is connected to the cover plate (3), and an automatic pressure relief valve (8) is provided on the exhaust pipe (7); The mounting box (9) is fixed on the cover plate (3), and a cyclone separator and a condenser are installed inside the mounting box (9). The input end of the cyclone separator is connected to the exhaust pipe (7), and the condenser is connected to the output end of the cyclone separator.

2. The wheel hub heat treatment device according to claim 1, characterized in that, The rotary lifting assembly (2) includes a connecting roller (21), a servo gear transmission assembly (22), and a telescopic cylinder (23). One end of the connecting roller (21) is rotatably connected to the cooling box (1); The servo gear transmission assembly (22) is mounted on the cooling box (1) and connected to the connecting roller (21); The telescopic cylinder (23) is located at the other end of the connecting roller (21) and the telescopic cylinder (23) is connected to a cover plate (3).

3. The wheel hub heat treatment device according to claim 1, characterized in that, The filter assembly (4) includes a limiting plate (41), a filter element (42), and a handle (43). The limiting plate (41) is symmetrically fixed inside the cooling box (1); The filter element (42) is attached to the inner wall of the cooling box (1) and abuts against the limiting plate (41); The handle (43) is symmetrically arranged on the filter element (42).

4. The wheel hub heat treatment device according to claim 1, characterized in that, The nitrogen delivery assembly (5) includes a gas pump (51), a nitrogen source, a three-way pipe (52), and a delivery pipe (53). The air pump (51) is fixed on the cooling box (1), and the input end of the air pump (51) is connected to the nitrogen source; One of the pipes of the three-way pipe (52) is connected to the output end of the air pump (51), and the remaining two pipes of the three-way pipe (52) are connected to the delivery pipe (53) respectively. One delivery pipe (53) is connected to the top area of ​​the cooling box (1), and the other delivery pipe (53) is connected to the bottom area of ​​the cooling box (1).

5. The wheel hub heat treatment device according to claim 4, characterized in that, Both of the two conveying pipes (53) are equipped with one-way valves (54) that allow only inflow and no outflow.

6. The wheel hub heat treatment device according to claim 1, characterized in that, The bottom area of ​​the cooling box (1) is connected to a drain pipe (10), and a valve (11) is provided on the drain pipe (10).

7. The wheel hub heat treatment device according to claim 1, characterized in that, The cover plate (3) is provided with a rectangular slot (12), and the upper surface of the cooling box (1) is provided with a rectangular plug that is inserted into the rectangular slot (12), and a sealing gasket is provided in the inner circumference of the rectangular slot (12).

8. The wheel hub heat treatment device according to claim 1, characterized in that, The mounting box (9) is provided with a side door and heat dissipation holes.

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