Composite mold shell dewaxing device for flange ball valve casting

Abstract

The utility model relates to a compound mould shell dewaxing device for flange ball valve casting, which comprises a base, a dewaxing box and a steam generator, the dewaxing box is arranged at the top of the base, the top of the steam generator is fixedly connected with a transmission pipe, the back of the dewaxing box is fixedly connected with a joint, a placer is arranged in the dewaxing box, the top of the placer is provided with a groove, and the steam generator is arranged in the groove. A first flow guide groove is formed in the bottom of the placer, a second flow guide groove is formed in the top of the base, an inner groove is formed in the front side of the base, a discharging pipe is fixedly connected into the inner groove, a standing barrel is arranged in the inner groove, and an exhaust pipe is fixedly connected to the top of the dewaxing box; the top of the base is provided with a rail groove, the bottom of the placer is provided with moving wheels, and the side edge of the dewaxing box is provided with a box door. The dewaxing device is simple to operate and easy to use, wax liquid is easy to discharge, accumulation is reduced, time is saved, and operation efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of valve casting, in particular to a dewaxing device for a composite die shell used in the casting of a flange ball valve. Background Art

[0002] The casting of valves is an important link in the valve production process. The commonly used precision casting method is investment casting, also known as lost-wax casting. Usually, several layers of refractory materials are coated on the surface of the wax pattern. After it hardens and dries, the wax pattern therein is melted away to make a mold shell, and then through roasting, and then pouring to obtain a casting. The castings obtained by investment casting have high dimensional accuracy and surface finish. The process of melting away the wax pattern to make a mold shell is called dewaxing. The main dewaxing methods include hot water dewaxing method and high-pressure steam dewaxing method. The utility model patent with the application number CN201820685833.X discloses a dewaxing device for a precision casting super-large composite mold shell, including a pressurizing device, a steam device, a dewaxing device, and a wax collecting device; among them, the pressurizing device is arranged on the right side of the steam device, and the pressurizing device is fixedly connected with the steam device. A dewaxing device is arranged on the left side of the steam device, and the dewaxing device is connected with the steam device. A wax collecting device is arranged below the dewaxing device, and the wax collecting device is connected with the dewaxing device; the pressurizing device includes a motor, a pressurizing cylinder, and a steam pipe. The motor is arranged on the pressurizing cylinder, and the pressurizing cylinder is fixedly connected with the motor. A steam pipe is arranged on the left side of the pressurizing cylinder, and the steam pipe is fixedly connected with the steam device; the steam device is composed of a fixing frame, a steam generator, a pressure gauge, a valve, and a heat transfer pipe. Among them, the steam generator is arranged on the fixing frame and fixedly connected with the fixing frame. A heat transfer pipe is arranged on the steam generator, and the heat transfer pipe is fixedly connected with the steam generator. A valve is arranged on the heat transfer pipe, and the heat transfer pipe is connected with the dewaxing device; the dewaxing device includes a dewaxing cylinder, a workpiece, a dewaxing rack, a track, a wheel, and a funnel-shaped wax outlet. Among them, a track is arranged in the dewaxing cylinder, and the track is fixedly connected with the dewaxing cylinder. Wheels are arranged on the track, and a dewaxing rack is arranged on the wheels. A funnel-shaped wax outlet is arranged at the bottom of the dewaxing cylinder, and the funnel-shaped wax outlet is fixedly connected with the dewaxing cylinder; the wax collecting device includes a fixed wax collecting cylinder and a wax discharging pipe. Among them, the wax collecting cylinder is arranged under the funnel-shaped wax outlet, and the funnel-shaped wax outlet is connected with the wax collecting cylinder. A wax discharging pipe is arranged at the bottom of the wax collecting cylinder, and the wax discharging pipe is fixedly connected with the wax collecting cylinder. However, the dewaxing rack is not specially set, and the wax liquid formed by heating is easy to accumulate on the dewaxing rack, and even flow through the wheels and the track, and it is difficult to completely discharge the wax liquid. Summary of the Utility Model

[0003] The utility model aims to solve the problems existing in the above-mentioned prior art, and provides a dewaxing device for a composite mold shell used in the casting of a flange ball valve, which is easy to operate and use, the wax liquid is easy to discharge and the accumulation is reduced, and the time is saved and the operation efficiency is improved.

[0004] The technical solution adopted by the utility model to solve its technical problems: This dewaxing device for a composite mold shell used in the casting of a flange ball valve includes a base, a dewaxing box and a steam generator. The dewaxing box is installed on the top of the base. A transmission pipe is fixedly connected to the top of the steam generator. A joint is fixedly connected to the back of the dewaxing box. The transmission pipe is inserted into the inside of the joint. A placer is arranged inside the dewaxing box. A groove is opened at the top of the placer. A placement plate is fixedly connected inside the groove. A plurality of leakage holes are opened on the surface of the placement plate. A first diversion groove is arranged at the bottom of the placer. A second diversion groove is arranged on the top of the base. An inner groove is opened at the front side of the base. A blanking pipe is fixedly connected inside the inner groove. The blanking pipe is connected to the second diversion groove. A static bucket is arranged inside the inner groove. The static bucket is installed at the bottom of the blanking pipe. An exhaust pipe is fixedly connected to the top of the dewaxing box. A valve is arranged on the surface of the exhaust pipe. A track groove is opened on the top of the base. Moving wheels are arranged at the bottom of the placer. The moving wheels are inside the track groove. A box door is arranged on the side of the dewaxing box. The mold is placed on the placement plate inside the placer. Push the placer into the dewaxing box. The moving wheels roll along the track groove. After the placer and the mold reach the set position, close the box door. Turn on the steam generator. The hot steam generated by the steam generator reaches the inside of the dewaxing box through the transmission pipe and the joint. The redundant low-temperature air inside the dewaxing box is discharged through the exhaust pipe. After the temperature inside the dewaxing box reaches a certain level, the wax mold inside the mold is heated and melted. The wax liquid passes through a plurality of leakage holes and reaches the first diversion groove, and then successively passes through the second diversion groove and the blanking pipe to reach the static bucket. Appropriately turn off the steam generator and the valve. The high temperature inside the dewaxing box allows the wax mold to be completely heated and melted. After dewaxing, open the box door again, pull out the placer and take out the required mold shell. The whole process is easy to operate and use, the wax liquid is easy to discharge and the accumulation is reduced, and the time is saved and the operation efficiency is improved.

[0005] For further improvement, there are four moving wheels of the placer. The first diversion groove is between the four moving wheels. During the dewaxing process, the wax liquid does not come into contact with the moving wheels and the track groove, avoiding the accumulation of the wax liquid and eliminating the influence on the moving wheels and the track groove.

[0006] For further improvement, a movable groove is opened on the side of the dewaxing box, and the movable groove extends to the top of the base. The box door is inside the movable groove. An adhesive layer is arranged on the surface of the box door. The box door moves inside the movable groove to realize the opening and closing of the box door. The adhesive layer fits the inner wall of the movable groove, enhancing the sealing effect of the dewaxing box.

[0007] For further improvement, the blanking pipe is at the central position inside the inner groove. A chamfer is arranged at the front side of the inner groove. The setting of the chamfer expands the operation space and facilitates the operation of the static bucket.

[0008] Further improvement: A connector is also connected and provided on the side of the steam generator, a moving wheel is also provided at the bottom of the steam generator, a controller is provided on the surface of the steam generator, the connector on the side of the steam generator is connected to an external water source to supplement the water source, the steam generator relies on the moving wheel for movement and transfer, and the steam generator relies on the controller for opening, closing, pausing and other settings.

[0009] Further improvement: An installation groove is provided on the side of the connector, the end of the transmission pipe is inserted into the installation groove, a threaded hole is opened at the top of the connector, a hand-tightening bolt is threadedly connected inside the threaded hole, the hand-tightening bolt reaches inside the installation groove, and the hand-tightening bolt abuts against the side surface of the transmission pipe. The transmission pipe is inserted into the installation groove to achieve the connection of the pipeline. The installation of the transmission pipe is convenient, and it is effectively fixed by using the hand-tightening bolt to avoid detachment and improve stability.

[0010] Further improvement: A fixing frame is provided on the side of the base, the fixing frame is of an L-shaped structure, an electric push rod is installed inside the fixing frame, there are two electric push rods, and the piston rods of the two electric push rods are connected to the side of the box door. Controlling the two electric push rods to extend and contract facilitates the quick closing and opening of the box door, saving time and manpower and improving work efficiency.

[0011] Further improvement: A sub-frame is fixedly connected inside the fixing frame, an extension groove is opened at the top of the sub-frame, and the bottom of the box door reaches inside the extension groove. The sub-frame provides effective support for the box door, and the box door moves in the movable groove and the extension groove, increasing the stability of the moving process of the box door.

[0012] The beneficial effects of the present utility model are:

[0013] 1. Place the module on the placement plate in the placer, push the placer into the dewaxing box, the moving wheel rolls along the track groove, close the box door after the placer and the module reach the set position, and turn on the steam generator. The hot steam generated by the steam generator passes through the transmission pipe and the connector to reach the inside of the dewaxing box. The excess low-temperature air inside the dewaxing box is discharged through the exhaust pipe. After the temperature inside the dewaxing box reaches a certain level, the wax mold inside the module is heated and melted, and the wax liquid passes through multiple leakage holes to reach the first diversion groove, and then successively passes through the second diversion groove and the blanking pipe to reach the static bucket. Appropriately turn off the steam generator and the valve. The high temperature inside the dewaxing box allows the wax mold to be completely heated and melted. After dewaxing, open the box door, pull out the placer and take out the required mold shell. The whole process is simple and easy to use, the wax liquid is easy to discharge and the accumulation is reduced, saving time and improving work efficiency.

[0014] 2. Connect an external water source through the joint on the side of the steam generator to replenish the water source. The steam generator is moved and transferred by means of mobile wheels. The steam generator is turned on, off, paused, and other settings are made by relying on the controller. The transmission pipe is inserted into the installation groove to achieve pipeline connection. The transmission pipe is convenient to install and is effectively fixed by hand-tightening bolts to avoid detachment and improve stability.

[0015] 3. By controlling the extension and contraction operations of the two electric push rods, it is convenient to quickly close and open the box door, saving time and manpower and improving the operation efficiency. The auxiliary frame provides effective support for the box door. The box door moves within the movable groove and the extension groove, increasing the stability of the movement process of the box door. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural diagram of the present utility model;

[0017] Figure 2 for the present utility model Figure 1 is an enlarged view of part A;

[0018] Figure 3 is a display diagram of the placer of the present utility model;

[0019] Figure 4 is a front view of the structure of the present utility model;

[0020] Figure 5 is an internal display diagram of the dewaxing box of the present utility model;

[0021] Figure 6 for the present utility model Figure 5 is an enlarged view of part B;

[0022] Figure 7 is a rear view of the structure of the present utility model;

[0023] Figure 8 for the present utility model Figure 7 is an enlarged view of part C;

[0024] Figure 9 is a display diagram of the activity of the hand-tightening bolt of the present utility model;

[0025] Figure 10 for the present utility model Figure 7 is an enlarged view of part D;

[0026] Figure 11 for the present utility model Figure 7 is an enlarged view of part E.

[0027] Description of reference numerals: 1, base; 2, dewaxing box; 3, steam generator; 4, transfer pipe; 5, joint; 6, placer; 7, groove; 8, placement plate; 9, leakage hole; 10, first diversion groove; 11, second diversion groove; 12, inner groove; 13, blanking pipe; 14, static barrel; 15, exhaust pipe; 16, valve; 17, track groove; 18, moving wheel; 19, box door; 20, movable groove; 21, adhesive layer; 22, cut corner; 23, controller; 24, installation groove; 25, threaded hole; 26, hand-tightening bolt; 27, fixing frame; 28, electric push rod; 29, sub-frame; 30, extension groove. Detailed implementation mode

[0028] The following is further described in conjunction with the attached Figures 1-11 This embodiment is further described as follows:

[0029] As Figures 1-11 shown: In this embodiment, a dewaxing device for a composite die shell used in the casting of a flange ball valve includes a base 1, a dewaxing box 2 and a steam generator 3. The dewaxing box 2 is installed on the top of the base 1. The top of the steam generator 3 is fixedly connected with a transfer pipe 4. The back of the dewaxing box 2 is fixedly connected with a joint 5. The transfer pipe 4 is inserted into the inside of the joint 5. A placer 6 is arranged inside the dewaxing box 2. A groove 7 is opened at the top of the placer 6. A placement plate 8 is fixedly connected inside the groove 7. A plurality of leakage holes 9 are opened on the surface of the placement plate 8. A first diversion groove 10 is arranged at the bottom of the placer 6. A second diversion groove 11 is arranged on the top of the base 1. An inner groove 12 is opened on the front side of the base 1. A blanking pipe 13 is fixedly connected inside the inner groove 12. The blanking pipe 13 is connected to the second diversion groove 11. A static barrel 14 is arranged inside the inner groove 12. The static barrel 14 is installed at the bottom of the blanking pipe 13. An exhaust pipe 15 is fixedly connected to the top of the dewaxing box 2. A valve 16 is arranged on the surface of the exhaust pipe 15. A track groove 17 is opened on the top of the base 1. Moving wheels 18 are arranged at the bottom of the placer 6. The moving wheels 18 are inside the track groove 17. A box door 19 is arranged on the side of the dewaxing box 2. There are four moving wheels 18 of the placer 6. The first diversion groove 10 is between the four moving wheels 18. A movable groove 20 is opened on the side of the dewaxing box 2. The movable groove 20 extends to the top of the base 1. The box door 19 is inside the movable groove 20. An adhesive layer 21 is arranged on the surface of the box door 19. The blanking pipe 13 is at the central position inside the inner groove 12. A cut corner 22 is arranged on the front side of the inner groove 12.

[0030] As Figures 7-9 shown: A joint 5 is also connected and arranged on the side of the steam generator 3. Moving wheels 18 are also arranged at the bottom of the steam generator 3. A controller 23 is arranged on the surface of the steam generator 3. An installation groove 24 is arranged on the side of the joint 5. The end of the transfer pipe 4 is inserted into the inside of the installation groove 24. A threaded hole 25 is opened on the top of the joint 5. A hand-tightening bolt 26 is threadedly connected inside the threaded hole 25. The hand-tightening bolt 26 reaches the inside of the installation groove 24. The hand-tightening bolt 26 abuts against the side surface of the transfer pipe 4.

[0031] As Figure 1 , Figure 4 , Figure 5 , Figure 7 and Figure 11 shown: A fixing frame 27 is arranged on the side of the base 1. The fixing frame 27 has an L-shaped structure. An electric push rod 28 is installed inside the fixing frame 27. There are two electric push rods 28. The piston rods of the two electric push rods 28 are connected to the side of the box door 19. A sub-frame 29 is fixedly connected inside the fixing frame 27. An extension groove 30 is opened at the top of the sub-frame 29. The bottom of the box door 19 reaches inside the extension groove 30.

[0032] When the present utility model is in use: The transmission pipe 4 is inserted into the installation groove 24 of the joint 5 to realize the connection of the pipeline. The hand-tightening bolt 26 is obtained. The hand-tightening bolt 26 is threadedly connected to the threaded hole 25. The hand-tightening bolt 26 reaches inside the installation groove 24 and abuts against the side surface of the transmission pipe 4, and the transmission pipe 4 is fixed. The mold is placed on the placement plate 8 inside the placer 6. The placer 6 is pushed into the dewaxing box 2. The moving wheels 18 roll along the track groove 17. After the placer 6 and the mold reach the set position, the two electric push rods 28 are controlled to extend. The two electric push rods 28 extend and drive the box door 19 to move, and the box door 19 is closed. The steam generator 3 is turned on through the controller 23. The hot steam generated by the steam generator 3 passes through the transmission pipe 4 and the joint 5 and reaches inside the dewaxing box 2. The redundant low-temperature air inside the dewaxing box 2 is discharged through the exhaust pipe 15. After the inside of the dewaxing box 2 reaches a certain temperature, the wax mold inside the mold is heated and melted. The wax liquid passes through a plurality of leakage holes 9 and reaches the first diversion groove 10, and then successively passes through the second diversion groove 11 and the blanking pipe 13 and reaches the static bucket 14. The first diversion groove 10 is between the four moving wheels 18. During the dewaxing process, the wax liquid does not come into contact with the moving wheels 18 and the track groove 17, avoiding the accumulation of the wax liquid and eliminating the influence on the moving wheels 18 and the track groove 17. The steam generator 3 and the valve 16 are timely closed. The high temperature inside the dewaxing box 2 allows the wax mold to be completely heated and melted. After the dewaxing is completed, the box door 19 is opened again, and the placer 6 is pulled out to take out the required mold shell. The whole process is simple and easy to use. The wax liquid is easy to discharge and reduces accumulation, saving time and improving the operation efficiency.

[0033] Although the present utility model has been illustrated and described by referring to the preferred embodiments, those of ordinary skill in the art should understand that various changes in form and details can be made within the scope of the claims.

Claims

1. A dewaxing device for a composite mold shell used in the casting of a flange ball valve, comprising a base (1), a dewaxing box (2) and a steam generator (3), characterized in that: The dewaxing box (2) is installed on the top of the base (1). A transfer pipe (4) is fixedly connected to the top of the steam generator (3). A connector (5) is fixedly connected to the back of the dewaxing box (2). The transfer pipe (4) is inserted into the inside of the connector (5). A placer (6) is arranged inside the dewaxing box (2). A groove (7) is opened at the top of the placer (6). A placement plate (8) is fixedly connected inside the groove (7). Leak holes (9) are opened on the surface of the placement plate (8). There are multiple leak holes (9). A first diversion groove (10) is arranged at the bottom of the placer (6). A second diversion groove (11) is arranged on the top of the base (1). An inner groove (12) is opened on the front side of the base (1). A blanking pipe (13) is fixedly connected inside the inner groove (12). The blanking pipe (13) is connected to the second diversion groove (11). A static bucket (14) is arranged inside the inner groove (12). The static bucket (14) is installed at the bottom of the blanking pipe (13). An exhaust pipe (15) is fixedly connected to the top of the dewaxing box (2). A valve (16) is arranged on the surface of the exhaust pipe (15). A track groove (17) is opened on the top of the base (1). Moving wheels (18) are arranged at the bottom of the placer (6). The moving wheels (18) are inside the track groove (17). A box door (19) is arranged on the side of the dewaxing box (2).

2. The dewaxing device for the composite die shell used in the casting of a flange ball valve according to claim 1, characterized in that: There are four moving wheels (18) of the placer (6). The first diversion groove (10) is between the four moving wheels (18).

3. The dewaxing device for the composite die shell used in the casting of a flange ball valve according to claim 1, characterized in that: An activity groove (20) is opened on the side of the dewaxing box (2). The activity groove (20) extends to the top of the base (1). The box door (19) is inside the activity groove (20). An adhesive layer (21) is arranged on the surface of the box door (19).

4. The dewaxing device for the composite die shell used in the casting of a flange ball valve according to claim 1, characterized in that: The blanking pipe (13) is at the central position inside the inner groove (12). A cut corner (22) is arranged on the front side of the inner groove (12).

5. The dewaxing device for the composite die shell used in the casting of a flange ball valve according to claim 1, characterized in that: A connector (5) is also connected and arranged on the side of the steam generator (3). Moving wheels (18) are also arranged at the bottom of the steam generator (3). A controller (23) is arranged on the surface of the steam generator (3).

6. The dewaxing device for the composite die shell used in the casting of a flange ball valve according to claim 1, wherein: An installation groove (24) is arranged on the side of the connector (5). The end of the transfer pipe (4) is inserted into the inside of the installation groove (24). A threaded hole (25) is opened on the top of the connector (5). A hand-tightening bolt (26) is threadedly connected inside the threaded hole (25). The hand-tightening bolt (26) reaches the inside of the installation groove (24). The hand-tightening bolt (26) abuts against the side surface of the transfer pipe (4).

7. A dewaxing device for a composite mold shell used in the casting of a flange ball valve according to claim 1, characterized in that: A fixing frame (27) is arranged on the side of the base (1). The fixing frame (27) is of an L-shaped structure. An electric push rod (28) is installed inside the fixing frame (27). There are two electric push rods (28). The piston rods of the two electric push rods (28) are connected to the side of the box door (19).

8. The dewaxing device for the composite die shell used in the casting of a flange ball valve according to claim 7, characterized in that: A sub-frame (29) is fixedly connected inside the fixing frame (27). An extension groove (30) is opened on the top of the sub-frame (29). The bottom of the box door (19) reaches the inside of the extension groove (30).

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