Counter gravity casting furnace mold chamber sealing device

Abstract

The application discloses a sealing device for a casting mold chamber of an anti-gravity casting furnace, which comprises a communication part in the form of a tubular structure formed in the lower wall of the casting mold chamber, an inner furnace cover located in the casting mold chamber, and a driving assembly located outside the smelting chamber and the casting mold chamber, which is sealingly connected with the communication part and capable of driving the inner furnace cover to perform vertical relative movement and horizontal relative movement relative to the furnace mouth to close or open the furnace mouth. The application is suitable for the smelting of a high-temperature alloy anti-gravity precision casting furnace, and the sealing of the liquid lifting pipe passage from the outside under vacuum. The application has the advantages of compact structure, moderate volume, stable operation, sensitive action response, reliable connection, low maintenance cost and the like, and fundamentally solves the problem of the sealing of the liquid lifting pipe passage of the smelting chamber in the smelting process of the anti-gravity technology.

Description

Technical Field

[0001] This invention relates to the field of metallurgy, and in particular to a sealing device for the mold chamber of an anti-gravity casting furnace. Background Technology

[0002] Currently, with the vigorous development of the steel industry, metallurgical equipment is also changing rapidly. Especially in the field of complex thin-walled castings, the requirements for the weight and mechanical properties of castings are quite stringent. These castings are often used in cutting-edge industries such as aerospace and satellite aerospace.

[0003] In general, the inner furnace cover device of a gravity casting furnace adopts an upper flap valve structure, located inside the melting chamber. The melting chamber of a gravity casting furnace is located above the mold chamber, and there is a large installation space above the melting chamber, so there is no problem with using a flap valve structure. Anti-gravity pressure regulating casting equipment is different from conventional casting equipment. The crucible is located below the mold shell, and the flow direction of the molten metal during casting is against gravity, that is, the molten metal flows from bottom to top. There is no space above the melting chamber of an anti-gravity casting furnace to install a flap valve structure.

[0004] Under these conditions, an inner furnace cover sealing device was designed and installed above the melting chamber. This device is detachable, easy to maintain and install. In actual use, it has achieved all the expected results, received excellent feedback, and is increasingly favored by customers.

[0005] Therefore, there is an urgent need for a device that can be placed in the melting chamber of a casting furnace and provide a stable sealing function during melting and vacuum conditions. Summary of the Invention

[0006] The summary of this invention introduces a series of simplified concepts, all of which are simplifications of existing technologies in the field, and will be further explained in detail in the detailed description section. This summary is not intended to limit the key features and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0007] The technical problem to be solved by the present invention is to provide a sealing device for the mold chamber of an anti-gravity casting furnace that is simple in structure and can provide a stable sealing function.

[0008] To solve the above-mentioned technical problems, the present invention provides a sealing device for the mold chamber of an anti-gravity casting furnace, comprising:

[0009] The connecting part 25 is a tubular structure formed on the lower wall of the mold chamber 23;

[0010] The inner furnace cover 11 is located in the mold chamber 23;

[0011] The drive assembly, located outside the melting chamber and the mold chamber, has a sealed connection 25 that drives the inner furnace cover 11 to perform vertical relative movement and lateral relative movement relative to the furnace opening 26, thereby closing or opening the furnace opening 26.

[0012] Preferably, the sealing device for the mold chamber of the anti-gravity casting furnace is further improved, wherein the lateral relative movement refers to the horizontal rotational movement of the inner furnace cover 11 around the connecting part 25 as the center in a certain plane or different planes.

[0013] Preferably, in a further improvement to the anti-gravity casting furnace mold chamber sealing device, the driving assembly includes:

[0014] The main mounting base 19 is sealed and mounted on the lower end of the tube section 25 by the mounting base seal 5;

[0015] The outer rotating seal 4 is installed on the main body mounting base 19;

[0016] The bearing housing 20 is installed at the lower end of the main body mounting base 19;

[0017] Bearing 3 is mounted on bearing housing 20;

[0018] The outer rotating seal 4 is installed around the bearing 3.

[0019] Rotary bushing 10 is installed in the connecting part 25;

[0020] The lifting cylinder 2 is mounted on the lifting cylinder mounting base 13 fixed at the lower end of the bearing seat 20;

[0021] The lifting cylinder mounting base 13 passes through the bearing 3, is connected to the rotating bushing 10, and can rotate with the rotating bushing 10;

[0022] Cylinder connecting rod 6 is connected to short connecting rod 8 via connecting spherical bearing 7;

[0023] The cylinder connecting rod 6, the spherical bearing 7, and the short connecting rod 8 are inserted into the rotating bushing 10;

[0024] The rotary cylinder mounting base 12 is fixedly connected to the lifting cylinder mounting base 13 at one end and fixedly connected to the outer top wall of the melting chamber 22 at the other end.

[0025] A rotary cylinder 1, whose tail end is fixedly connected to a rotary cylinder mounting base 12, and whose output end is connected to a lifting cylinder mounting base 13;

[0026] Long connecting rod 9, one end of which is connected to short connecting rod 8, and the other end of which is fitted with inner furnace cover 11;

[0027] The long connecting rod rotating fixed rod 16 has one end connected to the rotating bushing 10 and the other end connected to the long connecting rod 9 through the fixed shaft 18;

[0028] The short connecting rod 8 and the inner furnace cover 11 can move up and down with the fixed shaft 18 as the center point.

[0029] Preferably, the improved anti-gravity casting furnace mold chamber sealing device further includes:

[0030] The cylinder piston rod sealing seat 14 is installed between the lifting cylinder mounting seat 13 and the rotating bushing 10;

[0031] The cylinder piston rod seal ring 15 is installed in the cylinder piston rod seal seat 14.

[0032] Preferably, the improved anti-gravity casting furnace mold chamber sealing device further includes:

[0033] An external connecting seat 24 is formed on the side wall or bottom wall of the mold chamber 23, through which the cooling water pipe 21 enters the mold chamber 23;

[0034] Cooling water pipe 21 is connected to the cooling water circulation pipeline on the inner furnace cover 11.

[0035] Preferably, the improved anti-gravity casting furnace mold chamber sealing device further includes:

[0036] The inner furnace cover sealing ring 17 is fixed at the position where the inner furnace cover 11 contacts the furnace opening 26.

[0037] Preferably, the improved anti-gravity casting furnace mold chamber sealing device further includes:

[0038] A PLC controller is used to control the movement of drive components.

[0039] Preferably, the sealing device of the anti-gravity casting furnace mold chamber is further improved such that when the furnace opening 26 is closed, the PLC controller controls the drive component to first perform a horizontal relative movement to reach directly above the furnace opening 26, and then performs a vertical relative movement to close the furnace opening 26.

[0040] When the furnace opening 26 is opened, the PLC controller controls the drive component to first perform a vertical relative movement to disengage from the furnace opening 26, and then perform a horizontal relative movement to close the furnace opening 26.

[0041] The working principle and technical effects of this invention are as follows:

[0042] The lifting cylinder controls the vertical movement of the inner furnace cover via a cylinder connecting rod, spherical bearing, short connecting rod, fixed shaft, and long connecting rod. The rotary cylinder controls the rotation of the inner furnace cover via a rotating bushing, long connecting rod, rotating fixed rod, and fixed shaft.

[0043] This invention uses a dual-cylinder system to rotate and move the inner furnace cover apart, as well as to press and release it from above and below, to complete the entire operation. When in use, after the rotating cylinder reaches its designated position, the lifting cylinder is then lowered to press and seal the inner furnace cover.

[0044] When not in use, the inner furnace cover is released by controlling the lifting cylinder upwards, and then the rotating cylinder is controlled to rotate back to the initial position. Considering that the inner furnace cover is in a high-temperature environment for a long time during use, and the inner seal cannot be used at high temperatures, this invention designs an external water circulation cooling system for the inner furnace cover.

[0045] This invention is applicable to the sealing of the riser pipe channel in the melting chamber of a high-temperature alloy anti-gravity precision casting furnace under vacuum conditions, and to the external environment. It possesses numerous advantages, including compact structure, moderate size, stable operation, sensitive response, reliable connection, easy maintenance, and low cost, fundamentally solving the problem of sealing the riser pipe channel in the melting chamber during anti-gravity melting processes. Attached Figure Description

[0046] The accompanying drawings are intended to illustrate the general characteristics of the methods, structures, and / or materials used in specific exemplary embodiments of the invention, supplementing the description in the specification. However, the drawings are schematic diagrams not drawn to scale and may not accurately reflect the precise structural or performance characteristics of any of the given embodiments. The drawings should not be construed as limiting or restricting the range of numerical values ​​or properties covered by exemplary embodiments of the invention. The invention will now be described in further detail with reference to the accompanying drawings and specific embodiments:

[0047] Figure 1 This is a schematic diagram of a preferred embodiment of the driving component of the present invention.

[0048] Figure 2 This is a top view schematic diagram of the fourth embodiment.

[0049] Explanation of reference numerals in the attached figures

[0050] Rotary cylinder 1

[0051] Lifting cylinder 2

[0052] Bearing 3

[0053] Rotary outer seal 4

[0054] Mounting seat seal 5

[0055] Cylinder connecting rod 6

[0056] Spherical plain bearing 7

[0057] Short Linkage 8

[0058] Long connecting rod 9

[0059] Rotary bushing 10

[0060] Inner furnace cover 11

[0061] Rotary cylinder mounting base 12

[0062] Lifting cylinder mounting base 13

[0063] Cylinder piston rod seal seat 14

[0064] Cylinder piston rod seal ring 15

[0065] Long connecting rod rotating fixed rod 16

[0066] Inner furnace cover sealing ring 17

[0067] Fixed shaft 18

[0068] Main mounting base 19

[0069] Bearing housing 20

[0070] Cooling water pipe 21

[0071] Melting Room 22

[0072] Casting Chamber 23

[0073] External connector 24

[0074] Connecting part 25

[0075] Furnace opening 26. Detailed Implementation

[0076] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can fully understand other advantages and technical effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through different specific embodiments, and various details in this specification can also be applied based on different viewpoints, with various modifications or changes made without departing from the overall design concept of the invention. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. The following exemplary embodiments of the present invention can be implemented in many different forms and should not be construed as being limited to the specific embodiments set forth herein. It should be understood that these embodiments are provided so that the disclosure of the present invention is thorough and complete, and that the technical solutions of these exemplary embodiments are fully conveyed to those skilled in the art. It should be understood that when an element is referred to as "connected" or "combined" to another element, the element can be directly connected or combined to the other element, or there may be intermediate elements. The difference is that when an element is referred to as "directly connected" or "directly combined" to another element, there are no intermediate elements. Throughout the drawings, the same reference numerals always denote the same elements. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0077] First embodiment;

[0078] This invention provides a sealing device for the mold chamber of an anti-gravity casting furnace, comprising:

[0079] The connecting part 25 is a tubular structure formed on the lower wall of the mold chamber 23;

[0080] The inner furnace cover 11 is located in the mold chamber 23;

[0081] The drive assembly, located outside the melting chamber and the mold chamber, has a sealed connection 25 that can drive the inner furnace cover 11 to perform vertical relative movement and lateral relative movement relative to the furnace opening 26, thereby closing or opening the furnace opening 26.

[0082] The lateral relative motion refers to the horizontal rotation of the inner furnace cover 11 around the connecting part 25 as the center in a certain plane or different planes.

[0083] Second embodiment;

[0084] refer to Figure 1 As shown, the present invention provides a preferred embodiment of a driving component based on the design concept of the first embodiment described above. The identical parts will not be repeated. The driving component includes:

[0085] The main mounting base 19 is sealed and mounted on the lower end of the tube section 25 by the mounting base seal 5;

[0086] The outer rotating seal 4 is installed on the main body mounting base 19;

[0087] The bearing housing 20 is installed at the lower end of the main body mounting base 19;

[0088] Bearing 3 is mounted on bearing housing 20;

[0089] The outer rotating seal 4 is installed around the bearing 3.

[0090] Rotary bushing 10 is installed in the connecting part 25;

[0091] The lifting cylinder 2 is mounted on the lifting cylinder mounting base 13 fixed at the lower end of the bearing seat 20;

[0092] The lifting cylinder mounting base 13 passes through the bearing 3, is connected to the rotating bushing 10, and can rotate with the rotating bushing 10;

[0093] Cylinder connecting rod 6 is connected to short connecting rod 8 via connecting spherical bearing 7;

[0094] The cylinder connecting rod 6, the spherical bearing 7, and the short connecting rod 8 are inserted into the rotating bushing 10;

[0095] The rotary cylinder mounting base 12 is fixedly connected to the lifting cylinder mounting base 13 at one end and fixedly connected to the outer top wall of the melting chamber 22 at the other end.

[0096] A rotary cylinder 1, whose tail end is fixedly connected to a rotary cylinder mounting base 12, and whose output end is connected to a lifting cylinder mounting base 13;

[0097] Long connecting rod 9, one end of which is connected to short connecting rod 8, and the other end of which is fitted with inner furnace cover 11;

[0098] The long connecting rod rotating fixed rod 16 has one end connected to the rotating bushing 10 and the other end connected to the long connecting rod 9 through the fixed shaft 18;

[0099] The short connecting rod 8 and the inner furnace cover 11 can move up and down with the fixed shaft 18 as the center point.

[0100] Third embodiment;

[0101] This embodiment is a further improvement based on the second embodiment described above. The identical parts will not be repeated. The anti-gravity casting furnace mold chamber sealing device further includes:

[0102] The cylinder piston rod sealing seat 14 is installed between the lifting cylinder mounting seat 13 and the rotating bushing 10;

[0103] The cylinder piston rod seal ring 15 is installed in the cylinder piston rod seal seat 14.

[0104] The inner furnace cover sealing ring 17 is fixed at the position where the inner furnace cover 11 contacts the furnace opening 26.

[0105] Fourth embodiment;

[0106] refer to Figure 2 As shown, this embodiment is a further improvement based on the second or third embodiment described above. The identical parts will not be repeated. The anti-gravity casting furnace mold chamber sealing device further includes:

[0107] An external connecting seat 24 is formed on the side wall or bottom wall of the mold chamber 23, through which the cooling water pipe 21 enters the mold chamber 23;

[0108] Cooling water pipe 21 is connected to the cooling water circulation pipeline on the inner furnace cover 11.

[0109] Fifth embodiment;

[0110] The embodiments are further improvements based on any one of the first to S11 embodiments described above. The identical parts will not be repeated. The anti-gravity casting furnace mold chamber sealing device further includes:

[0111] A PLC controller is used to control the movement of drive components.

[0112] When the furnace opening 26 is closed, the PLC controller controls the drive component to first perform a horizontal relative movement to reach directly above the furnace opening 26, and then perform a vertical relative movement to close the furnace opening 26.

[0113] When the furnace opening 26 is opened, the PLC controller controls the drive component to first perform a vertical relative movement to disengage from the furnace opening 26, and then perform a horizontal relative movement to close the furnace opening 26.

[0114] Unless otherwise defined, all terms used herein (including technical and scientific terms) shall have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. It will also be understood that, unless expressly defined herein, terms such as those defined in a general dictionary shall be interpreted as having the meaning consistent with their meaning in the relevant field context, and not as having an idealized or overly formal meaning.

[0115] The present invention has been described in detail above through specific embodiments and examples, but these are not intended to limit the invention. Many modifications and improvements can be made by those skilled in the art without departing from the principles of the invention, and these should also be considered within the scope of protection of the present invention.

Claims

1. A sealing device for the mold chamber of an anti-gravity casting furnace, characterized in that, include: The connecting part (25) is a tubular structure formed on the lower wall of the mold chamber (23); The inner furnace cover (11) is located in the mold chamber (23); A drive assembly located outside the melting chamber and the mold chamber, having a sealed connection (25), is capable of driving the inner furnace cover (11) to perform vertical relative movement and lateral relative movement relative to the furnace opening (26), thereby closing or opening the furnace opening (26); the drive assembly includes: The main mounting base (19) is sealed and mounted on the lower end of the connecting part (25) by the mounting base seal (5); Rotary outer seal (4) is installed on main body mounting base (19); The bearing housing (20) is installed at the lower end of the main body mounting base (19); Bearing (3) is mounted on bearing housing (20); The rotating outer seal (4) is installed around the bearing (3); A rotating bushing (10) is installed in the connecting part (25); The lifting cylinder (2) is installed on the lifting cylinder mounting base (13) fixed at the lower end of the bearing seat (20); The lifting cylinder mounting seat (13) passes through the bearing (3) and is connected to the rotating bushing (10), and can rotate with the rotating bushing (10); The cylinder connecting rod (6) is connected to the short connecting rod (8) via a connecting spherical bearing (7); The cylinder connecting rod (6), the spherical bearing (7) and the short connecting rod (8) are inserted into the rotating bushing (10); Rotary cylinder mounting base (12), one end is fixedly connected to lifting cylinder mounting base (13) and the other end is fixedly connected to the outer top wall of melting chamber (22); A rotary cylinder (1) is fixedly connected to a rotary cylinder mounting base (12) at its tail end, and its output end is connected to a lifting cylinder mounting base (13). A long connecting rod (9) is connected at one end to a short connecting rod (8), and an inner furnace cover (11) is installed at the other end. The long connecting rod is a rotating fixed rod (16), one end of which is connected to a rotating bushing (10), and the other end of which is connected to a long connecting rod (9) through a fixed shaft (18). The short connecting rod (8) and the inner furnace cover (11) can move up and down with the fixed axis (18) as the center point.

2. The sealing device for the mold chamber of the anti-gravity casting furnace as described in claim 1, characterized in that: The lateral relative motion refers to the horizontal rotation of the inner furnace cover (11) around the connecting part (25) in a certain plane or different planes.

3. The sealing device for the mold chamber of the anti-gravity casting furnace as described in claim 1, characterized in that, Also includes: The cylinder piston rod seal seat (14) is installed between the lifting cylinder mounting seat (13) and the rotating bushing (10); The cylinder piston rod seal ring (15) is installed in the cylinder piston rod seal seat (14).

4. The sealing device for the mold chamber of the anti-gravity casting furnace as described in claim 1, characterized in that, Also includes: An external connecting seat (24) is formed on the side wall or bottom wall of the mold chamber (23) for the cooling water pipe (21) to enter the mold chamber (23). The cooling water pipe (21) is connected to the cooling water circulation pipe on the inner furnace cover (11).

5. The sealing device for the mold chamber of the anti-gravity casting furnace as described in claim 1, characterized in that, Also includes: The inner furnace cover sealing ring (17) is fixed at the position where the inner furnace cover (11) contacts the furnace opening (26).

6. The sealing device for the mold chamber of the anti-gravity casting furnace as described in any one of claims 1-5, characterized in that, Also includes: A PLC controller is used to control the movement of drive components.

7. The sealing device for the mold chamber of the anti-gravity casting furnace as described in claim 6, characterized in that: When the furnace opening (26) is closed, the PLC controller controls the drive component to first perform a horizontal relative movement to reach directly above the furnace opening (26), and then perform a vertical relative movement to close the furnace opening (26). When the furnace opening (26) is opened, the PLC controller controls the drive component to first perform vertical relative motion to disengage from the furnace opening (26), and then perform horizontal relative motion to close the furnace opening (26).

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