Pre-vacuumizing box type heat treatment furnace for grinding track bolt

Abstract

The utility model relates to the field of vacuum heat treatment furnaces, and discloses a pre-vacuumizing box type heat treatment furnace for grinding track bolts, which comprises a furnace door, the furnace door is rotatably arranged on the front side of the outer wall of a vacuum heat treatment furnace body, and a vacuum pump is fixed on the top surface of the vacuum heat treatment furnace body. Electric heating pipes are fixed to the left side and the right side of the inner wall of the vacuum heat treatment furnace body correspondingly, arc-shaped flow guide plates are fixed to the left side and the right side of the inner wall of the vacuum heat treatment furnace body correspondingly, and a plurality of arc-shaped flow guide grooves are formed in the inner walls of the two arc-shaped flow guide plates correspondingly. According to the vacuum heat treatment furnace, the interior of the vacuum heat treatment furnace body can be heated through the electric heating pipe, heat treatment can be conducted on the track bolt, meanwhile, hot air can be evenly dispersed on the track bolt through the draught fan, the arc-shaped flow guide plate and the arc-shaped flow guide groove, the heat treatment effect of the track bolt is consistent, and therefore the overall strength and abrasion resistance of the track bolt are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of vacuum heat treatment furnaces, in particular to a pre-vacuum box-type heat treatment furnace for grinding track bolts. Background Art

[0002] Track bolts are a key component in heavy machinery, such as construction machinery and mining equipment. Their performance directly impacts the stability and safety of the equipment. Therefore, heat treatment of track bolts to improve their mechanical properties is crucial.

[0003] At present, most vacuum heat treatment furnaces only use heating elements (such as resistance wires, electric heating tubes, etc.) to heat the inside of the vacuum heat treatment furnace and heat treat the track bolts. Therefore, there are the following disadvantages: the hot air inside the vacuum heat treatment furnace may not be evenly dispersed to the track bolts, resulting in inconsistent heat treatment effects and reducing the overall strength and wear resistance of the track bolts. Utility Model Content

[0004] The purpose of the utility model is to provide a pre-vacuum box-type heat treatment furnace for grinding track bolts, so as to solve the problem that the hot air inside the vacuum heat treatment furnace may not be evenly dispersed to the track bolts, resulting in inconsistent heat treatment effects and reducing the overall strength and wear resistance of the track bolts.

[0005] In order to achieve the above-mentioned purpose of the utility model, the utility model adopts the following technical solutions: a pre-vacuum box-type heat treatment furnace for grinding track bolts, comprising a furnace door, the furnace door being rotatably arranged on the front side of the outer wall of the vacuum heat treatment furnace body, a tray being movably arranged inside the vacuum heat treatment furnace body, a PLC controller being fixed on the right side of the outer wall of the vacuum heat treatment furnace body, a connecting hole being opened on the top surface of the vacuum heat treatment furnace body, a vacuum pump being fixed on the top surface of the vacuum heat treatment furnace body, and the vacuum pump being electrically connected to the PLC controller A delivery pipe is fixed between the input end of the vacuum pump and the connecting hole, electric heating pipes are respectively fixed on the left and right sides of the inner wall of the vacuum heat treatment furnace body, the electric heating pipes are electrically connected to the PLC controller, a mounting hole is provided on the top surface of the vacuum heat treatment furnace body, a fan is fixed on the top surface of the vacuum heat treatment furnace body, a mounting pipe is fixed between the fan and the mounting hole, arc-shaped guide plates are respectively fixed on the left and right sides of the inner wall of the vacuum heat treatment furnace body, and a plurality of arc-shaped guide grooves are respectively provided on the inner walls of the two arc-shaped guide plates.

[0006] Preferably, a fixing hole is opened on the right side of the outer wall of the vacuum heat treatment furnace body, a temperature sensor is fixed inside the fixing hole, and the temperature sensor is electrically connected to the PLC controller.

[0007] Preferably, a placement hole is opened on the top surface of the vacuum heat treatment furnace body, a vacuum gauge is fixed on the top surface of the vacuum heat treatment furnace body, and the vacuum gauge is electrically connected to the PLC controller.

[0008] Preferably, a graphite sealing frame is fixed to the right side of the furnace door.

[0009] Preferably, the left and right sides of the inner wall of the vacuum heat treatment furnace body are respectively provided with slide grooves, the left and right sides of the outer wall of the tray are respectively fixed with sliding rods, and the two sliding rods are respectively slidably arranged in the two slide grooves.

[0010] Preferably, a hand-removal groove is provided on the front side of the outer wall of the tray.

[0011] Compared with the existing technology, the pre-vacuum box-type heat treatment furnace for grinding track bolts using the above technical solution has the following beneficial effects:

[0012] 1. During use, the electric heating tube can heat the interior of the vacuum heat treatment furnace body and perform heat treatment on the track bolts. At the same time, the fan, arc-shaped guide plate and arc-shaped guide groove can evenly disperse the hot air on the track bolts, making the heat treatment effect consistent, thereby improving the overall strength and wear resistance of the track bolts.

[0013] Second, during use, the temperature sensor facilitates real-time monitoring and feedback of the temperature inside the vacuum heat treatment furnace to the PLC controller, making temperature control more precise and enabling immediate adjustment of the heating power to ensure that the temperature inside the furnace is always maintained within the optimal heat treatment range. The installation of a vacuum gauge allows staff to monitor the vacuum level inside the furnace in real time, ensuring that the required vacuum environment is maintained during the heat treatment process. By monitoring the vacuum level in real time, potential air leaks can be discovered and addressed in a timely manner, avoiding heat treatment failures or safety accidents caused by insufficient vacuum.

[0014] 3. During use, the graphite sealing frame, made of high-temperature and corrosion-resistant graphite material, fits tightly against the furnace door and the vacuum heat treatment furnace body, forming a reliable sealing barrier that prevents gas leakage and the intrusion of external impurities during the heat treatment process. The tray's sliding rods on its outer wall cooperate with the slide grooves to achieve smooth sliding within the vacuum heat treatment furnace body, simplifying the tray's entry and exit process and reducing operational difficulty and labor intensity. The hand-access slot allows workers to easily grasp and remove the tray from the interior of the vacuum heat treatment furnace body after heat treatment is completed, providing a convenient way for workers to remove and place the tray. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional schematic diagram of an embodiment.

[0016] Figure 2Schematic diagram of the explosion of the embodiment.

[0017] Figure 3 Schematic cross-sectional view of the arc-shaped guide plate in the embodiment.

[0018] Figure 4 For example Figure 2 Enlarged schematic diagram of point A in the middle.

[0019] In the figure: 1. Furnace door; 2. Vacuum heat treatment furnace body; 3. Tray; 4. Connection hole; 5. Vacuum pump; 6. Delivery pipe; 7. Electric heating pipe; 8. Mounting hole; 9. Fan; 10. Mounting pipe; 11. Arc guide plate; 12. Arc guide groove; 13. Fixing hole; 14. Temperature sensor; 15. Placement hole; 16. Vacuum gauge; 17. Graphite sealing frame; 18. Slide groove; 19. Sliding rod; 20. Hand groove. DETAILED DESCRIPTION

[0020] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0021] like Figures 1-4 As shown, a pre-vacuum box-type heat treatment furnace for grinding track bolts includes a furnace door 1, which is rotatably arranged on the front side of the outer wall of the vacuum heat treatment furnace body 2. A tray 3 is movably arranged inside the vacuum heat treatment furnace body 2. A PLC controller is fixed to the right side of the outer wall of the vacuum heat treatment furnace body 2. A connecting hole 4 is opened on the top surface of the vacuum heat treatment furnace body 2. A vacuum pump 5 is fixed to the top surface of the vacuum heat treatment furnace body 2. The vacuum pump 5 is electrically connected to the PLC controller. The input end of the vacuum pump 5 is connected to the connecting hole 4. A conveying pipe 6 is fixed between them, electric heating pipes 7 are fixed on the left and right sides of the inner wall of the vacuum heat treatment furnace body 2, and the electric heating pipes 7 are electrically connected to the PLC controller. A mounting hole 8 is provided on the top surface of the vacuum heat treatment furnace body 2, and a fan 9 is fixed on the top surface of the vacuum heat treatment furnace body 2. A mounting pipe 10 is fixed between the fan 9 and the mounting hole 8. Arc-shaped guide plates 11 are fixed on the left and right sides of the inner wall of the vacuum heat treatment furnace body 2, and a number of arc-shaped guide grooves 12 are provided on the inner walls of the two arc-shaped guide plates 11.

[0022] During use, the staff first produces SCM440, an alloy structural steel with high steel purity, using a one-die cold heading and a two-die hot heading process to make the product have uniform metal streamlines, improve product toughness, and prevent breakage. After production, the staff places the track bolts on the tray 3, then opens the furnace door 1, puts them into the interior of the vacuum heat treatment furnace body 2, and then closes the furnace door 1. The air in the vacuum heat treatment furnace body 2 is extracted through the vacuum pump 5 and the conveying pipe 6 to reach a certain vacuum degree. The interior of the vacuum heat treatment furnace body 2 is then heated through the electric heating tube 7, so that the temperature inside the vacuum heat treatment furnace body 2 gradually rises to the predetermined heat treatment temperature, and then the fan 9 is started to blow the upper hot air in the vacuum heat treatment furnace body 2 downward, so that the hot air is evenly dispersed on the track bolts through the arc guide plate 11 and the arc guide groove 12, thereby improving the uniformity of heating.

[0023] The electric heating tube 7 can heat the interior of the vacuum heat treatment furnace body 2 and perform heat treatment on the track bolts. At the same time, the fan 9, the arc-shaped guide plate 11, and the arc-shaped guide groove 12 facilitate uniform dispersion of hot air on the track bolts, so that the heat treatment effect is consistent, thereby improving the overall strength and wear resistance of the track bolts.

[0024] like Figure 1 、 Figure 2 and Figure 4 As shown, a fixing hole 13 is opened on the right side of the outer wall of the vacuum heat treatment furnace body 2, and a temperature sensor 14 is fixed inside the fixing hole 13. The temperature sensor 14 is electrically connected to the PLC controller.

[0025] During use, the temperature sensor 14 is used to monitor the temperature inside the vacuum heat treatment furnace body 2 in real time and feed back the temperature to the PLC controller, making the temperature control more accurate and able to adjust the heating power in real time to ensure that the temperature inside the furnace is always kept within the optimal heat treatment range.

[0026] like Figure 1 、 Figure 2 and Figure 4 As shown, a placement hole 15 is opened on the top surface of the vacuum heat treatment furnace body 2, a vacuum gauge 16 is fixed on the top surface of the vacuum heat treatment furnace body 2, the vacuum gauge 16 is electrically connected to the PLC controller, and a graphite sealing frame 17 is fixed on the right side of the furnace door 1.

[0027] During use, the installation of the vacuum gauge 16 allows staff to monitor the vacuum level within the furnace in real time, ensuring that the required vacuum environment is maintained during the heat treatment process. By monitoring the vacuum level in real time, potential gas leaks can be promptly detected and addressed, avoiding heat treatment failures or safety accidents caused by insufficient vacuum. The graphite sealing frame 17 is made of high-temperature and corrosion-resistant graphite material and fits tightly with the furnace door 1 and the vacuum heat treatment furnace body 2, forming a reliable sealing barrier that prevents the leakage of furnace gases and the intrusion of external impurities during the heat treatment process.

[0028] like Figure 1 、 Figure 2 and Figure 4 As shown, a slide groove 18 is provided on the left and right sides of the inner wall of the vacuum heat treatment furnace body 2, and a sliding rod 19 is fixed on the left and right sides of the outer wall of the tray 3. The two sliding rods 19 are slidably arranged in the two slide grooves 18, and a hand removal groove 20 is provided on the front side of the outer wall of the tray 3.

[0029] During use, the tray 3 slides smoothly within the vacuum heat treatment furnace body 2 by means of the sliding rod 19 on its outer wall cooperating with the slide groove 18. This simplifies the process of loading and unloading the tray 3 and reduces the difficulty and labor intensity of operation. The hand-removal groove 20 allows the operator to easily grasp the hand-removal groove 20 and extract the tray 3 from the interior of the vacuum heat treatment furnace body 2 after the heat treatment is completed, providing a convenient way for the operator to take the tray 3 in and out.

[0030] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A pre-vacuum box-type heat treatment furnace for grinding track bolts, comprising a furnace door (1), wherein the furnace door (1) is rotatably arranged on the front side of the outer wall of a vacuum heat treatment furnace body (2), characterized in that: A tray (3) is movably provided inside the vacuum heat treatment furnace body (2), a PLC controller is fixed on the right side of the outer wall of the vacuum heat treatment furnace body (2), a connection hole (4) is opened on the top surface of the vacuum heat treatment furnace body (2), a vacuum pump (5) is fixed on the top surface of the vacuum heat treatment furnace body (2), the vacuum pump (5) is electrically connected to the PLC controller, a delivery pipe (6) is fixed between the input end of the vacuum pump (5) and the connection hole (4), and the left and right inner walls of the vacuum heat treatment furnace body (2) are connected to the vacuum pump (5). Electric heating pipes (7) are fixed on the sides, and the electric heating pipes (7) are electrically connected to the PLC controller. A mounting hole (8) is provided on the top surface of the vacuum heat treatment furnace body (2). A fan (9) is fixed on the top surface of the vacuum heat treatment furnace body (2). A mounting pipe (10) is fixed between the fan (9) and the mounting hole (8). Arc-shaped guide plates (11) are fixed on the left and right sides of the inner wall of the vacuum heat treatment furnace body (2). The inner walls of the two arc-shaped guide plates (11) are respectively provided with a plurality of arc-shaped guide grooves (12).

2. The pre-vacuum box-type heat treatment furnace for grinding track bolts according to claim 1, characterized in that: A fixing hole (13) is provided on the right side of the outer wall of the vacuum heat treatment furnace body (2), a temperature sensor (14) is fixed inside the fixing hole (13), and the temperature sensor (14) is electrically connected to the PLC controller.

3. The pre-vacuum box-type heat treatment furnace for grinding track bolts according to claim 2, characterized in that: A placement hole (15) is provided on the top surface of the vacuum heat treatment furnace body (2), a vacuum gauge (16) is fixed on the top surface of the vacuum heat treatment furnace body (2), and the vacuum gauge (16) is electrically connected to the PLC controller.

4. The pre-vacuum box-type heat treatment furnace for grinding track bolts according to claim 3, characterized in that: A graphite sealing frame (17) is fixed on the right side of the furnace door (1).

5. The pre-vacuum box-type heat treatment furnace for grinding track bolts according to claim 1, characterized in that: Slide grooves (18) are respectively provided on the left and right sides of the inner wall of the vacuum heat treatment furnace body (2), and sliding rods (19) are respectively fixed on the left and right sides of the outer wall of the tray (3), and the two sliding rods (19) are respectively slidably arranged in the two slide grooves (18).

6. The pre-vacuum box-type heat treatment furnace for grinding track bolts according to claim 5, characterized in that: A hand-removing groove (20) is provided on the front side of the outer wall of the tray (3).

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