Automatic constant-temperature sintering device for powder metallurgy

Abstract

The utility model provides an automatic constant-temperature sintering device for powder metallurgy, which comprises a sintering furnace, a constant-temperature box is arranged on the outer side of the sintering furnace, a temperature sensor is arranged in the constant-temperature box, and a heating device and a cooling device are respectively arranged on two sides of the constant-temperature box. The heating device and the cooling device are respectively used for injecting hot water and cold water into the constant-temperature box, a stirring device is also arranged in the constant-temperature box, a circulating water tank is arranged below the constant-temperature box, and the constant-temperature box is communicated with the circulating water tank. Temperature change of the sintering furnace shell can be reduced, hot water and cold water are injected into the constant temperature box through the heating device and the cooling device, temperature adjustment of the sintering furnace can be achieved, temperature control is more accurate, overlarge temperature fluctuation is avoided, and therefore the constant temperature state in the sintering furnace is guaranteed, and the service life of the sintering furnace is prolonged. In addition, the use of a single heat source or cold source is avoided, so that energy is saved, energy consumption is reduced, and the purposes of energy conservation and environmental protection are achieved.

Description

Technical Field

[0001] The utility model mainly relates to the technical field of powder metallurgy, in particular to an automatic constant temperature sintering device for powder metallurgy. Background Art

[0002] Powder metallurgy is a process technology that produces metal powder or uses metal powder (or a mixture of metal powder and non-metal powder) as raw material, and then forms and sinters it to produce metal materials, composite materials and various types of products. Powder metallurgy is similar to the production of ceramics, both of which belong to powder sintering technology. Therefore, a series of new powder metallurgy technologies can also be used to prepare ceramic materials. Due to the advantages of powder metallurgy technology, it has become the key to solving new material problems and plays a vital role in the development of new materials.

[0003] For example, a powder metallurgy sintering furnace that can effectively prevent foreign matter from entering the furnace chamber is provided with Chinese patent publication number CN203711830U, including: a furnace body, which is composed of a feed section, a sintering section and a cooling section connected in sequence, the feed section and the cooling section are respectively provided with exhaust pipes, the sintering section is provided with a liquid inlet, a liquid storage tank is provided above the sintering section, a liquid outlet is provided on the side wall of the liquid storage tank, the liquid outlet is connected to the liquid inlet through a liquid outlet pipe and a liquid outlet valve provided in the liquid outlet pipe pipeline, a dust cover is provided on the top of the exhaust pipe, and the dust cover includes: a cover plate, a plurality of long strip exhaust grooves are provided on the cover plate, a dust plate is provided in the exhaust groove, and one side wall of the dust plate is movably hinged to the corresponding side wall of the exhaust groove.

[0004] The above application effectively prevents foreign matter such as dust from entering the furnace chamber by setting a dust cover and setting the liquid outlet pipe on the side wall of the liquid storage tank, thereby ensuring the quality of the powder metallurgy parts. However, the sintering process of powder metallurgy is to heat the powder material to a certain temperature so that it forms the required crystal structure. If the temperature is unstable or too high or too low, it may cause incomplete or incorrect crystallization, thereby affecting the quality of the product. Therefore, maintaining a constant temperature can ensure the accuracy and stability of the sintering temperature, thereby obtaining better crystallization and product quality. Therefore, there is an urgent need for a powder metallurgy constant temperature sintering device that is easy to control and reduces energy consumption. Utility Model Content

[0005] 1. Technical problems to be solved by the utility model:

[0006] The utility model provides an automatic constant temperature sintering device for powder metallurgy, which is used to solve the technical problems existing in the above background technology.

[0007] 2. Technical solution:

[0008] To achieve the above-mentioned purpose, the technical solution provided by the utility model is: an automatic constant temperature sintering device for powder metallurgy, comprising a sintering furnace, a constant temperature box is arranged on the outside of the sintering furnace, a temperature sensor is arranged in the constant temperature box, a heating device and a cooling device are arranged on both sides of the constant temperature box, the heating device and the cooling device are used to inject hot water and cold water into the constant temperature box respectively, a stirring device is also arranged in the constant temperature box, a circulating water tank is arranged below the constant temperature box, and the constant temperature box is connected to the circulating water tank.

[0009] Preferably, the heating device comprises a hot water tank, which is connected to the circulating water tank via a first water inlet pipe, a water outlet of the hot water tank is connected to a first water pump and a first water outlet pipe, and the first water outlet pipe is connected to the constant temperature tank.

[0010] Preferably, the cooling device comprises a cold water tank, which is connected to the circulating water tank via a second water inlet pipe, a water outlet of the cold water tank is connected to a second water pump and a second water outlet pipe, and the second water outlet pipe is connected to the constant temperature box.

[0011] Preferably, the water outlet of the first water outlet pipe and the water outlet of the second water outlet pipe are both connected to a three-way valve, the three-way valve is connected to an electronic actuator, and the three-way valve is connected to the thermostat via a mixing tube.

[0012] Preferably, two stirring devices are provided, and the stirring devices include a motor, and the motor is installed on the constant temperature box through a motor mounting seat. The motor is connected to the rotating shaft through a pulley assembly, and the rotating shaft is rotatably installed on the constant temperature box and extends into the constant temperature box. The rotating shaft is provided with a plurality of stirring blades.

[0013] 3. Beneficial effects:

[0014] Compared with the prior art, the technical solution provided by the utility model has the following beneficial effects:

[0015] The utility model can reduce the temperature change of the sintering furnace shell by arranging a constant temperature box on the outer side of the sintering furnace, inject hot water and cold water into the constant temperature box through the heating device and the cooling device, monitor the temperature in the constant temperature box in real time according to the temperature sensor, and then realize the temperature adjustment of the sintering furnace through the cooperation of hot water and cold water, so that the temperature control is more accurate, and excessive temperature fluctuation is avoided, thereby ensuring the constant temperature state in the sintering furnace, and avoiding the use of a single heat source or cold source, thereby saving energy, reducing energy consumption, and achieving the purpose of energy saving and environmental protection.

[0016] The utility model provides a stirring device in the sintering furnace to stir the hot water and cold water injected into the thermostatic box. The stirring can break the surface tension of the water, making it easier to transfer heat, so as to prevent the hot water or the cold water from being locally overheated or overcooled, thereby making the whole water body heated or cooled more evenly, keeping the water temperature in the thermostatic box constant, and keeping the temperature of the sintering furnace stable. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0018] Figure 2 It is a schematic diagram of the upper structure of the utility model;

[0019] Figure 3 It is a schematic diagram of the internal structure of the utility model;

[0020] Figure 4 This is a schematic diagram of the structure of the heating device of the utility model;

[0021] Figure 5 This is a schematic diagram of the structure of the stirring device of the present utility model.

[0022] Reference numerals:

[0023] 1. Sintering furnace; 2. Constant temperature box; 3. Heating device; 31. Hot water tank; 32. First water inlet pipe; 33. First water pump; 34. First water outlet pipe; 4. Cooling device; 41. Cold water tank; 42. Second water inlet pipe; 43. Second water pump; 44. Second water outlet pipe; 5. Circulating water tank; 6. Three-way valve; 7. Electronic actuator; 8. Mixing tube; 9. Stirring device; 91. Motor; 92. Motor mounting seat; 93. Pulley assembly; 94. Stirring blade. DETAILED DESCRIPTION

[0024] To facilitate the understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. Several embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0025] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "page", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0026] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0027] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed", "provided with", etc. should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] It should be noted that the structures not introduced in the present invention are not related to the design points and improvement directions of the present invention, and are the same as the prior art or can be implemented by using the prior art, and will not be described in detail here. Example

[0029] See attached Figures 1 to 5 An automatic constant temperature sintering device for powder metallurgy comprises a sintering furnace 1, a constant temperature box 2 is arranged outside the sintering furnace 1, a temperature sensor is arranged in the constant temperature box 2, a heating device 3 and a cooling device 4 are arranged on both sides of the constant temperature box 2, the heating device 3 and the cooling device 4 are used to inject hot water and cold water into the constant temperature box 2 respectively, a stirring device 9 is also arranged in the constant temperature box 2, a circulating water tank 5 is arranged below the constant temperature box 2, and the constant temperature box 2 is connected to the circulating water tank 5.

[0030] The heating device 3 includes a hot water tank 31, which can heat water and then inject hot water into the thermostat 2, or can be connected to an external hot water tank. The hot water tank 31 is connected to the circulating water tank 5 through a first water inlet pipe 32, and the water outlet of the hot water tank 31 is connected to a first water pump 33 and a first water outlet pipe 34, and the first water outlet pipe 34 is connected to the thermostat 2. In this embodiment, the water in the circulating water tank 5 is pumped to the hot water tank 31 by the first water pump 33 for heating, and then the hot water in the hot water tank 31 is injected into the thermostat 2 through the first water outlet pipe 34.

[0031] The cooling device 4 includes a cold water tank 41, which is connected to the circulating water tank 5 through a second water inlet pipe 42, and a water outlet of the cold water tank 41 is connected to a second water pump 43 and a second water outlet pipe 44, and the second water outlet pipe 44 is connected to the thermostat 2. The circulating water tank 5, the thermostat 2, the second water inlet pipe 42, the second water pump 43 and the second water outlet pipe 44 form a cold water circulation loop, which is convenient for recycling the water in the thermostat 2 and reducing the waste of water resources.

[0032] The water outlet of the first water outlet pipe 34 and the water outlet of the second water outlet pipe 44 are both connected to the three-way valve 6, which is connected to the electronic actuator 7. The three-way valve 6 is connected to the thermostat 2 through the mixing tube 8. The three-way valve 6 can combine the hot water and the cold water into one flow path to enter the mixing tube 8, and then inject it into the thermostat 2. The opening and closing of the three-way valve can be controlled by the electronic actuator 7 to adjust the flow of the hot water and cold water fluids, so as to accurately control the internal temperature of the thermostat 2.

[0033] There are two stirring devices 9, which include a motor 91, which is mounted on the thermostat 2 via a motor mounting seat 92, and which is connected to a rotating shaft via a pulley assembly 93. The rotating shaft is rotatably mounted on the thermostat 2 and extends into the thermostat 2, and a plurality of stirring blades 94 are arranged on the rotating shaft. The rotating shaft is driven to rotate by the motor 91 and the pulley assembly 93, thereby driving the stirring blades 94 to stir the water in the thermostat 2.

[0034] Working principle: By arranging a thermostat 2 outside the sintering furnace 1, the temperature change of the shell of the sintering furnace 1 can be reduced. Hot water and cold water are injected into the thermostat 2 through the heating device 3 and the cooling device 4, and the hot water and cold water injected into the thermostat 2 are stirred by the stirring device 9. Stirring can break the surface tension of water, making heat transfer easier to prevent local overheating or overcooling of hot water or cold water, so that the entire water body is heated or cooled more evenly, so that the water temperature in the thermostat is kept constant, and the temperature of the sintering furnace can be kept stable.

[0035] The temperature in the thermostat 2 is monitored in real time by the temperature sensor, and the temperature of the sintering furnace 1 can be adjusted by the combination of hot water and cold water, so that the temperature control is more accurate and the temperature fluctuation is avoided, thereby ensuring the constant temperature state in the sintering furnace 1. When the temperature in the thermostat 1 is high, a part of the water in the thermostat 1 is discharged into the circulating water tank 5, and then cold water is injected into the thermostat 1 through the cooling device 4. When the temperature in the thermostat 1 is low, a part of the water in the thermostat 1 is discharged into the circulating water tank 5, and then hot water is injected into the thermostat 1 through the heating device 3, and dynamic control is performed to maintain a constant temperature.

[0036] The above-described embodiments only express a certain implementation method of the utility model, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the utility model. It should be pointed out that, for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the patent of the utility model shall be based on the attached claims.

Claims

1. An automatic constant temperature sintering device for powder metallurgy, characterized in that: The invention comprises a sintering furnace (1), wherein a thermostatic box (2) is arranged outside the sintering furnace (1), a temperature sensor is arranged inside the thermostatic box (2), a heating device (3) and a cooling device (4) are arranged on both sides of the thermostatic box (2), the heating device (3) and the cooling device (4) are respectively used to inject hot water and cold water into the thermostatic box (2), a stirring device (9) is also arranged inside the thermostatic box (2), a circulating water tank (5) is arranged below the thermostatic box (2), and the thermostatic box (2) is connected to the circulating water tank (5).

2. The automatic constant temperature sintering device for powder metallurgy according to claim 1, characterized in that: The heating device (3) comprises a hot water tank (31), the hot water tank (31) being connected to the circulating water tank (5) via a first water inlet pipe (32), the water outlet of the hot water tank (31) being connected to a first water pump (33) and a first water outlet pipe (34), and the first water outlet pipe (34) being connected to the constant temperature tank (2).

3. The automatic constant temperature sintering device for powder metallurgy according to claim 2, characterized in that: The cooling device (4) comprises a cold water tank (41), the cold water tank (41) being connected to the circulating water tank (5) via a second water inlet pipe (42), the water outlet of the cold water tank (41) being connected to a second water pump (43) and a second water outlet pipe (44), and the second water outlet pipe (44) being connected to the constant temperature box (2).

4. The automatic constant temperature sintering device for powder metallurgy according to claim 3, characterized in that: The water outlet of the first water outlet pipe (34) and the water outlet of the second water outlet pipe (44) are both connected to a three-way valve (6), the three-way valve (6) is connected to an electronic actuator (7), and the three-way valve (6) is connected to the constant temperature box (2) via a mixing pipe (8).

5. The automatic constant temperature sintering device for powder metallurgy according to claim 1, characterized in that: The stirring devices (9) are provided with two, and the stirring devices (9) include a motor (91), the motor (91) is mounted on the thermostatic box (2) via a motor mounting seat (92), the motor (91) is connected to a rotating shaft via a pulley assembly (93), the rotating shaft is rotatably mounted on the thermostatic box (2) and extends into the thermostatic box (2), and a plurality of stirring blades (94) are provided on the rotating shaft.

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