Low-pressure vacuum carburizing furnace

Abstract

The utility model provides a low-pressure vacuum carburizing furnace which comprises a furnace body and a furnace cover, the furnace body is connected with a monitoring device and a diffusion device, and the diffusion device comprises a fixed barrel, a half gear, a rotating motor, a rack and a sealing block. The furnace body is connected with a vacuum pump, a heating device and an air inlet pipe. The furnace body is in a vacuum state through the vacuum pump, and then the temperature and the air pressure in the furnace body are detected through the temperature probe and the air pressure probe, so that the temperature and the air pressure in the furnace body are convenient to control, the product quality caused by large temperature change is avoided, and if the temperature drops, the temperature of the furnace body is kept balanced through the heating equipment; the semi-gear is driven to rotate through the rotating motor, so that the rack and the sealing block are driven to rapidly ascend and descend, rapid circulation of gas is achieved, the diffusion speed of carburizing gas is increased, and the phenomena of insufficient carburizing and non-uniform carburizing are avoided.

Description

Technical Field

[0001] The utility model patent relates to the technical field of carburizing furnaces, mainly to a low-pressure vacuum carburizing furnace. Background Art

[0002] The vacuum low-pressure carburizing furnace is a furnace specially used for vacuum carburizing and quenching process. After the parts are loaded into the furnace, they are evacuated to a high vacuum, and then heated to the carburizing temperature. A small amount of carburizing gas is introduced for carburizing. Usually, carburizing is carried out under a low vacuum of 5-20 mbar, so it is called a low-pressure vacuum carburizing process. After carburizing, quenching is performed to obtain a martensite-based structure.

[0003] However, in the existing low-pressure vacuum carburizing furnace, the interior is in a vacuum state during use. After a small amount of carburizing gas is introduced, the gas circulation rate is slow, resulting in a relatively slow carburizing efficiency, and insufficient and uneven carburizing. In this regard, we propose a low-pressure vacuum carburizing furnace. Utility Model Content

[0004] The utility model mainly provides a low-pressure vacuum carburizing furnace to solve the technical problems raised in the above background technology.

[0005] To achieve the above object, the following technical solution is provided: a low-pressure vacuum carburizing furnace, comprising a furnace body and a furnace cover rotatably connected to one side of the furnace body, a monitoring device is connected to one side of the top of the furnace body, a diffusion device is connected to the top of the furnace body, the diffusion device comprises a fixed barrel connected to the top of the furnace body, a half gear rotatably connected to the top of the fixed barrel, a rotating motor connected to one side of the half gear and a rack meshingly connected to both sides of the half gear, and a sealing block is connected to the bottom of the rack;

[0006] One side of the furnace body is connected to a vacuum pump, the lower surface of the interior of the furnace body is connected to a heating device, and both sides of the furnace body are connected to an air inlet pipe.

[0007] Furthermore, the monitoring device includes a display screen connected to the top of the furnace body, a temperature probe connected to one side of the bottom of the display screen, and an air pressure probe connected to the other side of the bottom of the display screen.

[0008] Furthermore, a plurality of top corners of the inner lower surface of the furnace body are connected to a shock absorbing support device, and the shock absorbing support device includes a telescopic member connected to the top of the furnace body, a spring sleeved on the outer wall of the telescopic member, and a support plate connected to the top of the telescopic member.

[0009] Furthermore, a handle is fixed on one side of the furnace cover.

[0010] Furthermore, the air inlet pipe is Y-shaped, and two air inlets of the air inlet pipe are connected to the furnace body.

[0011] Furthermore, a plurality of ventilation holes are provided at the bottom of the fixed barrel.

[0012] Furthermore, limiting slide grooves are provided on both sides of the top of the fixed barrel;

[0013] A sliding block is fixed on one side of the top of the rack, and the sliding block is slidably connected with the slot body of the limiting sliding slot.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] The utility model provides a low-pressure vacuum carburizing furnace, which puts the furnace body in a vacuum state through a vacuum pump, and then detects the temperature and air pressure in the furnace body through a temperature probe and an air pressure probe, so as to facilitate the control of the temperature and air pressure in the furnace body, and avoid the product quality being affected by large temperature changes. If the temperature drops, the furnace body temperature is kept balanced through a heating device, and the half gear is driven to rotate by a rotating motor, thereby driving the rack and the sealing block to rise and fall quickly, so as to realize the rapid circulation of gas, accelerate the diffusion speed of the carburizing gas, and avoid the phenomenon of insufficient carburizing and uneven carburizing.

[0016] The present invention will be explained in detail below with reference to the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 A cross-sectional view of the utility model as a whole;

[0019] Figure 3 A cross-sectional view of the utility model as a whole;

[0020] Figure 4 It is a schematic diagram of the overall structure of the utility model.

[0021] In the figure: 10, furnace body; 11, furnace cover; 111, handle; 20, diffusion device; 21, fixed barrel; 211, limit slide groove; 212, vent; 22, half gear; 23, rotating motor; 24, rack; 241, slider; 25, sealing block; 30, monitoring device; 31, display screen; 32, temperature probe; 33, air pressure probe; 40, vacuum pump; 50, heating device; 60, shock-absorbing support device; 61, telescopic member; 62, spring; 63, support plate; 70, air intake pipe. DETAILED DESCRIPTION

[0022] In order to facilitate the understanding of the present invention, the present invention will be described in more detail below with reference to the relevant drawings. Several embodiments of the present invention are given in the drawings, but the present invention can be implemented in different forms and is not limited to the embodiments described in the text. On the contrary, these embodiments are provided to make the content disclosed in the present invention more thorough and comprehensive.

[0023] For example, please refer to Figure 1-4 A low-pressure vacuum carburizing furnace comprises a furnace body 10 and a furnace cover 11 rotatably connected to one side of the furnace body 10, a monitoring device 30 is connected to one side of the top of the furnace body 10, a diffusion device 20 is connected to the top of the furnace body 10, and the diffusion device 20 comprises a fixed barrel 21 connected to the top of the furnace body 10, a half gear 22 rotatably connected to the top of the fixed barrel 21, a rotating motor 23 connected to one side of the half gear 22 and a rack 24 meshingly connected to both sides of the half gear 22, and a sealing block 25 is connected to the bottom of the rack 24;

[0024] One side of the furnace body 10 is connected to a vacuum pump 40 , the lower surface of the furnace body 10 is connected to a heating device 50 , and both sides of the furnace body 10 are connected to an air inlet pipe 70 .

[0025] It should be noted that, in the embodiment, the furnace body 10 is placed in a vacuum state by the vacuum pump 40, the temperature of the furnace body 10 is kept balanced by the heating device 50, carburizing gas is injected through the air inlet pipe 70, and the half gear 22 is driven to rotate by the rotating motor 23, thereby driving the rack 24 and the sealing block 25 to rise and fall, thereby realizing the circulation of gas and accelerating the diffusion rate of the carburizing gas.

[0026] For example, please refer to Figure 3 The monitoring device 30 includes a display screen 31 connected to the top of the furnace body 10 , a temperature probe 32 connected to one side of the bottom of the display screen 31 , and an air pressure probe 33 connected to the other side of the bottom of the display screen 31 .

[0027] It should be noted that, in the embodiment, the temperature probe 32 and the air pressure probe 33 are convenient for detecting the temperature and air pressure inside the furnace body 10, and displaying them through the display screen 31, so as to facilitate controlling the temperature and air pressure inside the furnace body 10 and avoid large temperature changes that may affect product quality.

[0028] For example, please refer to Figure 2-3 A shock-absorbing support device 60 is connected to multiple top corners of the lower surface of the furnace body 10. The shock-absorbing support device 60 includes a telescopic member 61 connected to the top of the furnace body 10, a spring 62 sleeved on the outer wall of the telescopic member 61, and a support plate 63 connected to the top of the telescopic member 61.

[0029] It should be noted that, in the embodiment, the spring 62 provides a buffering effect when the workpiece is placed, thereby preventing the workpiece from being damaged.

[0030] For example, please refer to Figure 2 A handle 111 is fixed to one side of the furnace cover 11 .

[0031] It should be noted that, in the embodiment, the handle 111 is convenient for opening the furnace cover 11 .

[0032] For example, please refer to Figure 4 The air inlet pipe 70 is Y-shaped, and two air inlets of the air inlet pipe 70 are connected to the furnace body 10 .

[0033] It should be noted that, in the embodiment, the air inlet pipe 70 is Y-shaped to facilitate the carburizing gas to be dispersed into the furnace body 10, which is more conducive to the diffusion of the carburizing gas.

[0034] For example, please refer to Figure 2 The bottom of the fixed barrel 21 is provided with a plurality of ventilation holes 212 .

[0035] It should be noted that, in the embodiment, the vent holes 212 facilitate the circulation of gas.

[0036] For example, please refer to Figure 4 , the top two sides of the fixed barrel 21 are provided with limiting slide grooves 211;

[0037] A slider 241 is fixed to one side of the top of the rack 24 , and the slider 241 is slidably connected to the groove body of the limiting sliding groove 211 .

[0038] It should be noted that, in the embodiment, the slider 241 improves the stability of the rack 24 .

[0039] The specific operation mode of the utility model is as follows:

[0040] The above-mentioned low-pressure vacuum carburizing furnace puts the furnace body 10 in a vacuum state through the vacuum pump 40, and then detects the temperature and air pressure in the furnace body 10 through the temperature probe 32 and the air pressure probe 33, so as to control the temperature and air pressure in the furnace body 10 and avoid large temperature changes that may affect product quality. If the temperature drops, the temperature of the furnace body 10 is kept balanced through the heating device 50;

[0041] The carburizing gas is injected through the air inlet pipe 70, and then the half gear 22 is driven to rotate by the rotating motor 23, thereby driving the rack 24 and the sealing block 25 to rise and fall quickly, thereby realizing the rapid circulation of the gas and accelerating the diffusion speed of the carburizing gas.

[0042] The above-described embodiments only express the implementation methods of the present application, but for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present application, which all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the attached claims.

Claims

1. A low-pressure vacuum carburizing furnace, comprising a furnace body (10) and a furnace cover (11) rotatably connected to one side of the furnace body (10), characterized in that: A monitoring device (30) is connected to one side of the top of the furnace body (10), and a diffusion device (20) is connected to the top of the furnace body (10). The diffusion device (20) comprises a fixed barrel (21) connected to the top of the furnace body (10), a half gear (22) rotatably connected to the top of the fixed barrel (21), a rotating motor (23) connected to one side of the half gear (22) and racks (24) meshingly connected to both sides of the half gear (22), and a sealing block (25) is connected to the bottom of the rack (24); One side of the furnace body (10) is connected to a vacuum pump (40), the lower surface of the interior of the furnace body (10) is connected to a heating device (50), and both sides of the furnace body (10) are connected to an air inlet pipe (70).

2. A low-pressure vacuum carburizing furnace according to claim 1, characterized in that: The monitoring device (30) comprises a display screen (31) connected to the top of the furnace body (10), a temperature probe (32) connected to one side of the bottom of the display screen (31), and an air pressure probe (33) connected to the other side of the bottom of the display screen (31).

3. A low-pressure vacuum carburizing furnace according to claim 1, characterized in that: A shock-absorbing support device (60) is connected to multiple top corners of the inner lower surface of the furnace body (10), and the shock-absorbing support device (60) comprises a telescopic member (61) connected to the top of the furnace body (10), a spring (62) sleeved on the outer wall of the telescopic member (61), and a support plate (63) connected to the top of the telescopic member (61).

4. A low-pressure vacuum carburizing furnace according to claim 1, characterized in that: A handle (111) is fixed to one side of the furnace cover (11).

5. A low-pressure vacuum carburizing furnace according to claim 1, characterized in that: The air inlet pipe (70) is Y-shaped, and two air inlets of the air inlet pipe (70) are connected to the furnace body (10).

6. A low-pressure vacuum carburizing furnace according to claim 1, characterized in that: The bottom of the fixed barrel (21) is provided with a plurality of ventilation holes (212).

7. A low-pressure vacuum carburizing furnace according to claim 6, characterized in that: Limiting slide grooves (211) are provided on both sides of the top of the fixed barrel (21); A sliding block (241) is fixed to one side of the top of the rack (24), and the sliding block (241) is slidably connected to the groove body of the limiting sliding groove (211).

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