Vacuum melting equipment

Abstract

The utility model discloses vacuum melting equipment which comprises an operation table and a vacuum heating furnace arranged on the upper end face of the operation table, and a heating system connected with the vacuum heating furnace and an external device capable of inputting protective gas into the vacuum heating furnace are arranged on the outer side of the operation table. The external connection device comprises an external connection pipe used for being communicated with the interior of the vacuum heating furnace and a quick connector facilitating replacement of protective gas, a vacuum system is arranged below the operation table, and the vacuum system comprises a vacuum pump and a vacuum valve arranged at the input end of the vacuum pump. The pressure intensity in the vacuum heating furnace can be kept to meet the production requirement through the vacuum pump, rapid reaction can be achieved through the external pipe and the rapid connector according to the production requirement, and corresponding protective gas is introduced into the vacuum heating furnace.

Description

Technical Field

[0001] The utility model belongs to the field of smelting equipment, and more specifically relates to vacuum smelting equipment. Background Art

[0002] Vacuum melting is a special melting technology for melting metals and alloys under vacuum conditions. A vacuum furnace generally consists of a main unit, a furnace chamber, an electric heating device, a sealed furnace shell, a vacuum system, a power supply system, a temperature control system, and a transport vehicle outside the furnace.

[0003] The existing vacuum furnace is large in size and inconvenient to operate when introducing the corresponding protective gas into the vacuum furnace, so it is difficult to meet the needs of existing production. Utility Model Content

[0004] The main purpose of the utility model is to provide a vacuum melting device which can timely introduce protective gas according to production needs and is easy to operate.

[0005] In order to achieve the above-mentioned purpose, the technical solution of the utility model is:

[0006] A vacuum melting equipment comprises an operating table and a vacuum heating furnace arranged on the upper end surface of the operating table. The outer side of the operating table is provided with a heating system connected to the vacuum heating furnace and an external device for inputting protective gas into the vacuum heating furnace. The external device includes an external pipe for communicating with the vacuum heating furnace and a quick interface for convenient replacement of protective gas. A vacuum system is provided below the operating table. The vacuum system includes a vacuum pump and a vacuum valve arranged at the input end of the vacuum pump.

[0007] In a specific embodiment of the present invention, the external connection device further comprises a first switch valve provided at an end of the external connection pipe away from the quick interface, and the first switch valve is located at the lower end surface of the operating table.

[0008] In a specific embodiment of the present invention, the vacuum heating furnace comprises a furnace shell and a furnace chamber located in the furnace shell, a crucible is provided in the furnace chamber, and a cover for sealing is hinged on the top of the furnace shell.

[0009] In a specific embodiment of the present invention, a water cooling device is provided on the outside of the vacuum heating furnace, and the water cooling device includes at least two pipes respectively connected to the furnace shell and a second switch valve for controlling the two pipes.

[0010] In a specific embodiment of the present invention, a plurality of reinforcing rods and a mounting plate for placing a vacuum pump are provided below the operating table, and both ends of the mounting plate are respectively connected to the corresponding reinforcing rods.

[0011] In a specific embodiment of the present invention, the heating system includes a controller and a heating element provided at an output end of the controller, and the heating element is located in the vacuum heating furnace.

[0012] In a specific embodiment of the present invention, an alarm device is provided above the controller.

[0013] In a specific embodiment of the present invention, the upper end surface of the operating table is further provided with a power supply device, and the power supply device is connected to the heating system.

[0014] One of the above technical solutions of the utility model has at least one of the following advantages or beneficial effects:

[0015] The utility model arranges a vacuum heating furnace on the end surface of the operating table and arranges a vacuum system below the operating table. Therefore, when a protective gas is input into the vacuum heating furnace by an external device, the pressure in the vacuum heating furnace can be maintained to meet the production requirements through a vacuum pump, and the external pipe and the quick interface can be used to quickly respond to the production needs and introduce the corresponding protective gas into the vacuum heating furnace. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0017] Attachment Figure 1 This is an overall structural diagram of an embodiment of the utility model;

[0018] Attachment Figure 2 This is a top view of an embodiment of the present invention. DETAILED DESCRIPTION

[0019] The following describes embodiments of the present invention in detail, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be understood as limiting the present invention.

[0020] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They 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. Therefore, they cannot be understood as limitations on the present invention.

[0021] In the description of this utility model, "several" means one or more, "many" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The use of "first" and "second" in the description is solely for the purpose of distinguishing technical features and is not to be construed as indicating or implying relative importance, implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.

[0022] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or to implicitly indicate the quantity of the technical features indicated. Thus, features defined as "first" and "second" may explicitly or implicitly include one or more features.

[0023] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense. For example, it can be a fixed connection or a movable connection, a detachable connection or a non-detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; it can be a direct connection or an indirect connection through an intermediate medium, and it can be internal connection between two elements, indirect connection, or an interactive relationship between two elements.

[0024] The following disclosure provides many different embodiments or examples for implementing different solutions of the present invention.

[0025] Refer to the attached Figure 1 To the attached Figure 2 As shown, a vacuum melting equipment includes an operating table 1, a vacuum heating furnace 2 arranged on the upper end surface of the operating table 1, and a power supply device 7. A heating system 3 connected to the vacuum heating furnace 2 and an external device for inputting protective gas into the vacuum heating furnace 2 are provided on the outside of the operating table 1, and the power supply device 7 is connected to the heating system 3.

[0026] In one embodiment of the present invention, the external device includes an external tube 5 for communicating with the vacuum heating furnace 2, a quick interface for convenient replacement of the protective gas, and a first switch valve arranged at one end of the external tube 5 away from the quick interface. The first switch valve is located on the lower end surface of the operating table 1, so that the external tube and the quick interface can be used to quickly respond to production needs and introduce corresponding protective gas into the vacuum heating furnace 2.

[0027] In one embodiment of the present invention, a vacuum system 4 is provided under the operating table 1. The vacuum system 4 includes a vacuum pump 41, a vacuum gauge, and a vacuum valve provided at the input end of the vacuum pump 41. The vacuum heat treatment of metal parts is carried out in a closed vacuum heating furnace 2. Therefore, when a protective gas is input into the vacuum heating furnace 2 by an external device, the pressure in the vacuum heating furnace 2 can be maintained by the vacuum pump 41 to meet the production requirements.

[0028] In one embodiment of the present invention, the vacuum heating furnace 2 includes a furnace shell 21 and a furnace chamber located in the furnace shell 21, a crucible 22 is provided in the furnace chamber, and a cover 23 for sealing is hinged on the top of the furnace shell 21. A key issue of the vacuum heating furnace 2 is that it must have a reliable vacuum sealing structure. In order to ensure the vacuum performance of the vacuum heating furnace 2, airtight welding should be adopted on the furnace shell 21. At the same time, as few or no holes as possible should be opened on the furnace shell 21, and dynamic sealing structures should be used less or avoided to minimize the chance of vacuum leakage. Components and accessories installed on the vacuum heating furnace 2, such as water-cooled electrodes and thermocouples, also need to be designed with sealing structures.

[0029] In one embodiment of the present invention, the heating system 3 includes a controller 31 and a heating element 32 arranged at the output end of the controller 31. The heating element 32 is located in the vacuum heating furnace 2 and can also be placed in the crucible 22. An alarm device 33 is also provided above the controller 31 to improve overall safety.

[0030] In one embodiment of the present invention, since the vacuum heating furnace 2 is in a vacuum state, the heating element 32 transfers heat to the workpiece via thermal radiation. Furthermore, the evaporation rate of the heating element 32 is higher than that of a conventional electric furnace. Therefore, when designing the material for the heating element in the vacuum heating furnace 2, considerations must be given to selecting a material with a high resistivity, a low temperature coefficient of resistance, sufficient high-temperature mechanical strength, a low thermal expansion coefficient, and resistance to chemical reactions with the protective gas and furnace lining within the furnace. Furthermore, the selection of the heating element material must be based on a comprehensive consideration of factors such as the temperature, structure, process requirements, and economic efficiency of the vacuum heating furnace 2. Therefore, the heating element 32 is preferably constructed of an alloy.

[0031] In one embodiment of the present invention, since the furnace shell 21, the cover body 23 and other components all work in a vacuum and heated state, it is necessary to ensure that the structure of each component is not deformed or damaged, and to ensure that the sealing ring is not overheated or burned. Therefore, each component should be equipped with a water cooling system according to different situations to ensure that the vacuum heating furnace 2 can operate normally and have a sufficient service life. Therefore, a water cooling device is provided on the outside of the vacuum heating furnace 2, and the water cooling device includes two pipes 6 that can be respectively connected to the inside of the furnace shell 21 and a second switch valve for controlling the two pipes 6.

[0032] In one embodiment of the present invention, a plurality of reinforcing rods 11 and a mounting plate 12 for placing a vacuum pump 41 are provided under the operating table 1. The two ends of the mounting plate 12 are respectively connected to the corresponding reinforcing rods 11, and the overall stability of the operating table 1 can be improved by the reinforcing rods 11.

[0033] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A vacuum melting equipment, characterized in that, The invention comprises an operating table (1) and a vacuum heating furnace (2) arranged on the upper end surface of the operating table (1); a heating system (3) connected to the vacuum heating furnace (2) and an external device capable of inputting protective gas into the vacuum heating furnace (2) are provided on the outer side of the operating table (1); the external device comprises an external pipe (5) for communicating with the vacuum heating furnace (2) and a quick interface for convenient replacement of protective gas; a vacuum system (4) is provided below the operating table (1); the vacuum system (4) comprises a vacuum pump (41) and a vacuum valve arranged at the input end of the vacuum pump (41).

2. The vacuum melting equipment according to claim 1, characterized in that: The external connection device further comprises a first switch valve provided at an end of the external pipe (5) away from the quick interface, wherein the first switch valve is located on the lower end surface of the operating table (1).

3. The vacuum melting equipment according to claim 1, characterized in that: The vacuum heating furnace (2) comprises a furnace shell (21) and a furnace chamber located in the furnace shell (21), a crucible (22) is provided in the furnace chamber, and a cover (23) for sealing is hinged on the top of the furnace shell (21).

4. The vacuum melting equipment according to claim 3, characterized in that: A water cooling device is provided on the outside of the vacuum heating furnace (2), and the water cooling device comprises at least two pipes (6) respectively connectable to the inside of the furnace shell (21) and a second switch valve for controlling the two pipes (6).

5. The vacuum melting equipment according to claim 1, characterized in that: A plurality of reinforcing rods (11) and a mounting plate (12) for placing a vacuum pump (41) are provided below the operating table (1), and both ends of the mounting plate (12) are respectively connected to the corresponding reinforcing rods (11).

6. The vacuum melting equipment according to claim 1, characterized in that: The heating system (3) comprises a controller (31) and a heating element (32) arranged at an output end of the controller (31), wherein the heating element (32) is located in the vacuum heating furnace (2).

7. The vacuum melting equipment according to claim 6, characterized in that: An alarm device (33) is provided above the controller (31).

8. The vacuum melting equipment according to claim 6, characterized in that: The upper end surface of the operating table (1) is also provided with a power supply device (7), and the power supply device (7) is connected to the heating system (3).

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