Low-temperature wax dewaxing device for valve casting

Abstract

The utility model relates to a low-temperature wax dewaxing device for valve casting, which comprises a low-temperature dewaxing chamber and a medium-temperature dewaxing chamber, the top of the medium-temperature dewaxing chamber is fixedly connected with a transmission pipe, the transmission pipe is connected with the low-temperature dewaxing chamber, a loading frame is placed in the low-temperature dewaxing chamber, the top of the loading frame is provided with an inner groove, the inner groove is internally provided with a placing plate, and the placing plate is connected with the medium-temperature dewaxing chamber. A plurality of shells are placed at the top of a placement plate, leakage holes are formed in the top of the placement plate, a drainage bin is arranged at the bottom of the placement plate, drainage holes are formed in the bottom of the drainage bin, a drainage groove is formed in the low-temperature dewaxing chamber, a built-in groove is formed in the low-temperature dewaxing chamber, a standing barrel is arranged in the built-in groove, and a discharging pipe is arranged at the bottom of the drainage groove. The energy-saving and environment-friendly dewaxing device has the advantages that the energy-saving and environment-friendly dewaxing device is energy-saving and environment-friendly, the quality of a shell and a product is improved, wax liquid backflow is avoided due to the large height difference between the structures, the dewaxing process is stable, and the operation efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of valve casting, in particular to a low-temperature wax dewaxing device for valve casting. Background Art

[0002] Valve casting is an important part of the valve production process. The commonly used precision casting method is investment casting, which is also called lost wax casting. Usually, several layers of refractory materials are coated on the surface of the wax film. After it hardens and dries, the wax film is melted to make a shell. After roasting, it is poured to obtain a casting. The casting obtained by investment casting has high dimensional accuracy and surface finish. The process of melting the wax pattern to make a shell is called dewaxing. The dewaxing methods mainly include hot water dewaxing method and high-pressure steam dewaxing method. The utility model patent application number: CN201620397337.5 discloses a low-temperature The wax dewaxing device includes a medium-temperature wax dewaxing chamber, a low-temperature wax dewaxing chamber, and a transport vehicle. The medium-temperature wax dewaxing chamber is provided with a medium-temperature wax dewaxing chamber air pipe, which connects the medium-temperature and low-temperature dewaxing chambers. The low-temperature wax dewaxing chamber is provided with a pressure pump, an observation window, and a sealed door. The low-temperature dewaxing chamber is provided with a transport vehicle inside the low-temperature dewaxing chamber. The transport vehicle is provided with a display rack, on which molds to be dewaxed are placed. The display rack is fixedly connected to the bottom of the display rack, and the display rack is a hollow rack with a transmission roller. The bottom of the filter is provided with a drainage plate. The low-temperature dewaxing chamber is provided with a wax collection box, which is provided with a wax discharge regulating valve. The melted wax can flow down through the hollow space between the transmission rollers on the display rack. After being filtered through the filter, the drainage plate guides the wax to the wax collection box for discharge. However, the height difference between the drainage plate, the wax discharge regulating valve, and the wax collection box is too small, which makes it easy for the wax liquid to flow back. Utility Model Content

[0003] The utility model aims to solve the problems existing in the above-mentioned prior art and provides a low-temperature wax dewaxing device for valve casting, which can save energy and be environmentally friendly and improve the quality of the mold shell and product. The large height difference between the structures can avoid the backflow of wax liquid, and the dewaxing process is stable to improve the working efficiency.

[0004] The utility model solves its technical problems by adopting a technical solution: this low-temperature wax dewaxing device for valve casting comprises a low-temperature dewaxing chamber and a medium-temperature dewaxing chamber, the top of the medium-temperature dewaxing chamber is fixedly connected with a transmission pipe, the transmission pipe is connected to the low-temperature dewaxing chamber, a loading rack is placed inside the low-temperature dewaxing chamber, an inner groove is provided on the top of the loading rack, a placing plate is provided inside the inner groove, multiple shells are placed on the top of the placing plate, a leakage hole is provided on the top of the placing plate, there are multiple leakage holes, a drainage bin is provided at the bottom of the placing plate, a drainage hole is provided at the bottom of the drainage bin, a drainage groove is provided inside the low-temperature dewaxing chamber, the drainage hole is directly above the drainage groove, a built-in groove is provided inside the low-temperature dewaxing chamber, a static barrel is provided inside the built-in groove, a discharge pipe is provided at the bottom of the drainage groove, the discharge pipe reaches the inside of the static barrel, a first valve is provided on the side surface of the discharge pipe, an exhaust pipe is fixedly connected to the top of the low-temperature dewaxing chamber, a second valve is provided on the side surface of the exhaust pipe, and the transmission A third valve is provided on the side surface of the tube, a pressure pump is provided on the top of the low-temperature dewaxing chamber, a warehouse door is provided on the side of the low-temperature dewaxing chamber, a transfer platform is fixedly connected to the side of the low-temperature dewaxing chamber, and a hydraulic freight elevator is provided on the side of the transfer platform. After the warehouse door is closed, the third valve is opened, and the hot steam in the medium-temperature dewaxing chamber reaches the interior of the low-temperature dewaxing chamber through the transmission pipe. With the cooperation of the pressure pump, the wax material in the shell is melted into wax liquid, and the wax liquid passes through multiple leakage holes, drainage bins and drainage holes in turn to reach the inside of the drainage trough. During the dewaxing process or after the dewaxing is completed, the first valve is opened in time, and the wax liquid then passes through the discharge pipe to the static barrel for storage. The drainage hole is at the center of the bottom of the drainage bin, the drainage hole is directly above the drainage trough, and the discharge pipe is at the center of the bottom of the drainage trough. The whole process is energy-saving and environmentally friendly, improving the quality of the shell and product. The large height difference between the structures prevents the wax liquid from flowing back, and the dewaxing process is stable to improve the operation efficiency.

[0005] In order to further improve it, the bottom of the loading frame is provided with moving wheels, there are multiple moving wheels, the side of the loading frame is fixedly connected to a column, there are two columns, and the inner side of the column is fixedly connected to a handrail. The loading frame is convenient for movement and transfer with the help of multiple moving wheels, and the handrail provides effective force to facilitate the operation of the loading frame by the operator.

[0006] For further improvement, an observation window is provided on the front side of the low-temperature dewaxing chamber, an observation window is also provided on the left side of the low-temperature dewaxing chamber, and a fill light is provided inside the low-temperature dewaxing chamber. The multiple observation windows facilitate multi-angle viewing of the interior of the low-temperature dewaxing chamber and the dewaxing process. The fill light effectively supplements the light source and improves the clarity of the viewing process.

[0007] To be further improved, a drainage cover is inserted into the drainage trough, a filter is fixedly connected to the inside of the drainage cover, a retaining edge is fixedly connected to the outside of the drainage cover, and a handle is fixedly connected to the top of the retaining edge. The drainage cover is easy to install and remove, and the drainage cover forms a barrier to reduce wax droplets splashing to the outside of the drainage trough. The filter effectively filters the wax liquid in the early stage, reduces impurities and facilitates the reuse of the wax liquid in the later stage.

[0008] Further improvement, there are two handles, the edges of the handles are provided with rounded corners, the side edges of the retaining edge are also provided with rounded corners, and the bottom of the drainage hood is provided with a cut corner. The two handles facilitate the operation of the drainage hood. The multiple rounded corners are provided to reduce sharp right-angle edges, improve safety and reduce accidental injuries. The setting of the cut corner is conducive to the bottom of the drainage hood being inserted into the drainage groove, reducing the alignment process and saving time.

[0009] For further improvement, the hydraulic freight elevator is provided with a lifting plate inside, and a hydraulic cylinder is installed on the top of the lifting plate. There are multiple hydraulic cylinders, and the piston rods of the multiple hydraulic cylinders are connected to the top of the hydraulic freight elevator. The side of the lifting plate is fixedly connected with an auxiliary slope. The loading rack reaches the lifting plate through the auxiliary slope, and the multiple hydraulic cylinders shrink and run synchronously. The lifting plate moves upward smoothly, driving the loading rack and the multiple mold shells to be lifted, making it convenient for the loading rack and the multiple mold shells to pass through the transfer table to the inside of the low-temperature dewaxing chamber, saving manpower and time and improving work efficiency.

[0010] For further improvement, a baffle is fixedly connected to the top of the lifting plate. There are two baffles. The two baffles are on the inner side of multiple hydraulic cylinders. Through holes are opened on the surface of the baffle. There are multiple through holes. Multiple through holes save the materials required for the baffles and reduce the weight of the baffles. The two baffles provide effective protection. The loading frame is restricted between the two baffles to avoid direct contact between the loading frame and multiple hydraulic cylinders, reducing mutual influence.

[0011] For further improvement, a slide groove is provided on the side of the hydraulic freight elevator, and a slider is fixedly connected to the side of the lifting plate. The slider is inside the slide groove. There are multiple sliders and slide grooves respectively. Multiple sliders interact with multiple slide grooves, and the lifting plate is effectively limited during the up and down movement, thereby improving the stability of the loading frame and the multiple placed shells during the up and down movement.

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

[0013] 1. After the warehouse door is closed, open the third valve, and the hot steam in the medium-temperature dewaxing chamber reaches the inside of the low-temperature dewaxing chamber through the transmission pipe. With the cooperation of the pressure pump, the wax material in the shell melts into wax liquid, and the wax liquid passes through multiple leakage holes, drainage bins and drainage holes in turn to reach the inside of the drainage trough. During the dewaxing process or after dewaxing is completed, open the first valve at the right time, and the wax liquid passes through the discharge pipe to the static barrel for storage. The drainage hole is at the center of the bottom of the drainage bin, and the drainage hole is directly above the drainage trough. The discharge pipe is at the center of the bottom of the drainage trough. The whole process is energy-saving and environmentally friendly, improving the quality of the shell and product. The large height difference between the structures prevents the wax liquid from flowing back, and the dewaxing process is stable to improve the operation efficiency.

[0014] 2. The drainage cover is easy to install and remove. The drainage cover forms a barrier to reduce the splashing of wax droplets to the outside of the drainage trough. The filter effectively filters the wax in the early stage, reduces impurities and facilitates the reuse of wax in the later stage. The two handles facilitate the operation of the drainage cover. Multiple rounded corners are set to reduce sharp right-angle edges, improve safety and reduce accidental injuries. The cut corner setting is conducive to the bottom of the drainage cover being inserted into the inside of the drainage trough, reducing the alignment process and saving time.

[0015] 3. The loading rack passes through the auxiliary slope to the lifting plate, and multiple hydraulic cylinders shrink and operate synchronously. The lifting plate moves upward smoothly, driving the loading rack and multiple placed mold shells to be lifted, making it convenient for the loading rack and multiple mold shells to pass through the transfer table to the inside of the low-temperature dewaxing chamber, saving manpower and time and improving work efficiency. Multiple through holes save the material required for the baffle while reducing the weight of the baffle. The two baffles provide effective protection, and the loading rack is restricted between the two baffles to avoid direct contact between the loading rack and multiple hydraulic cylinders, reducing mutual influence. Multiple sliders interact with multiple slides, and the lifting plate is effectively limited during the up and down movement, thereby improving the stability of the loading rack and the placed multiple mold shells during the up and down movement. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0017] Figure 2 For the utility model Figure 1 Enlarged view of point A in the middle;

[0018] Figure 3 This is a front view of the structure of the utility model;

[0019] Figure 4 This is a cross-sectional view of the low-temperature dewaxing chamber of the present utility model;

[0020] Figure 5 For the utility model Figure 4 Enlarged view of point B in the middle;

[0021] Figure 6 This is a diagram showing the structure of the loading rack of the present utility model;

[0022] Figure 7 This is a front view of the loading rack structure of the present utility model;

[0023] Figure 8 This is a diagram showing the structure of the drainage cover of the present utility model;

[0024] Figure 9 This is a front view of the drainage cover structure of the present utility model.

[0025] Explanation of the accompanying symbols: 1. Low-temperature dewaxing chamber; 2. Medium-temperature dewaxing chamber; 3. Transfer pipe; 4. Loading rack; 5. Inner trough; 6. Placement plate; 7. Leakage hole; 8. Drainage bin; 9. Drainage hole; 10. Drainage trough; 11. Built-in trough; 12. Standing barrel; 13. Discharge pipe; 14. First valve; 15. Exhaust pipe; 16. Second valve; 17. Third valve; 18. Pressure pump; 19. Warehouse door; 20. Transfer table; 21. Hydraulic freight elevator; 22. Moving wheel; 23. Column; 24. Handrail; 25. Observation window; 26. Fill light; 27. Drainage hood; 28. Filter; 29. Side guard; 30. Handle; 31. Rounded corner; 32. Cut corner; 33. Lifting plate; 34. Hydraulic cylinder; 35. Auxiliary slope; 36. Baffle; 37. Through hole; 38. Slide; 39. Slider. DETAILED DESCRIPTION

[0026] The following is combined with Figure 1-9 This embodiment is further described:

[0027] like Figure 1-7 As shown: In this embodiment, a low-temperature wax dewaxing device for valve casting includes a low-temperature dewaxing chamber 1 and a medium-temperature dewaxing chamber 2. A transmission pipe 3 is fixedly connected to the top of the medium-temperature dewaxing chamber 2, and the transmission pipe 3 is connected to the low-temperature dewaxing chamber 1. A loading rack 4 is placed inside the low-temperature dewaxing chamber 1, and an inner groove 5 is provided on the top of the loading rack 4. A placement plate 6 is provided inside the inner groove 5. Multiple shells are placed on the top of the placement plate 6. A leakage hole 7 is provided on the top of the placement plate 6. There are multiple leakage holes 7. A drainage bin 8 is provided at the bottom of the placement plate 6. A drainage hole 9 is provided at the bottom of the drainage bin 8. A drainage groove 10 is provided inside the low-temperature dewaxing chamber 1, and the drainage hole 9 is directly above the drainage groove 10. A built-in groove 11 is provided inside the low-temperature dewaxing chamber 1, and a static barrel 12 is provided inside the built-in groove 11. A discharge pipe 13 is provided at the bottom of the drainage groove 10, and the discharge pipe 13 reaches the static Inside the barrel 12, a first valve 14 is provided on the side surface of the discharge pipe 13, an exhaust pipe 15 is fixedly connected to the top of the low-temperature dewaxing chamber 1, a second valve 16 is provided on the side surface of the exhaust pipe 15, a third valve 17 is provided on the side surface of the transmission pipe 3, a pressure pump 18 is provided on the top of the low-temperature dewaxing chamber 1, a warehouse door 19 is provided on the side of the low-temperature dewaxing chamber 1, a transfer platform 20 is fixedly connected to the side of the low-temperature dewaxing chamber 1, a hydraulic freight elevator 21 is provided on the side of the transfer platform 20, a moving wheel 22 is provided at the bottom of the loading rack 4, there are multiple moving wheels 22, a column 23 is fixedly connected to the side of the loading rack 4, there are two columns 23, a handrail 24 is fixedly connected to the inside of the column 23, an observation window 25 is provided on the front side of the low-temperature dewaxing chamber 1, an observation window 25 is also provided on the left side of the low-temperature dewaxing chamber 1, and a fill light 26 is provided inside the low-temperature dewaxing chamber 1.

[0028] like Figure 5 、 Figure 8 and Figure 9As shown: a drainage cover 27 is inserted into the drainage groove 10, a filter screen 28 is fixedly connected to the inside of the drainage cover 27, a rib 29 is fixedly connected to the outside of the drainage cover 27, a handle 30 is fixedly connected to the top of the rib 29, there are two handles 30, the edge of the handle 30 is provided with a rounded corner 31, the side of the rib 29 is also provided with a rounded corner 31, and the bottom of the drainage cover 27 is provided with a cut corner 32.

[0029] like Figure 1-3 As shown: a lifting plate 33 is provided inside the hydraulic freight elevator 21, and a hydraulic cylinder 34 is installed on the top of the lifting plate 33. There are multiple hydraulic cylinders 34, and the piston rods of the multiple hydraulic cylinders 34 are connected to the top of the hydraulic freight elevator 21. The side of the lifting plate 33 is fixedly connected to an auxiliary slope 35, and the top of the lifting plate 33 is fixedly connected to a baffle 36. There are two baffles 36, and the two baffles 36 are on the inner side of the multiple hydraulic cylinders 34. A through hole 37 is provided on the surface of the baffle 36, and there are multiple through holes 37. A slide groove 38 is provided on the side of the hydraulic freight elevator 21, and a slider 39 is fixedly connected to the side of the lifting plate 33. The slider 39 is inside the slide groove 38, and there are multiple sliders 39 and slide grooves 38 respectively.

[0030] The lifting platform 33 is moved upwards by the lifting member 39 and the lifting member 39 is moved upwards by the lifting member 39. The lifting member 33 is moved upwards by the lifting member 39 and the lifting member 39 is moved upwards by the lifting member 39. Under the cooperation of the pump 18, the wax material in the shell is melted into wax liquid, and the wax liquid passes through multiple leakage holes 7, drainage bin 8 and drainage hole 9 in sequence to reach the inside of the drainage groove 10. The drainage groove 10 is provided with a drainage cover 27. The drainage cover 27 forms a barrier to reduce the wax droplets from splashing outside the drainage groove 10. The drainage cover 27 is provided with a filter 28 inside. The filter 28 effectively filters the wax liquid in the early stage. During the dewaxing process or after the dewaxing is completed, the first valve 14 is opened in time, and the wax liquid then passes through the discharge pipe 13 to reach the static barrel 12 For storage and placement, the drainage hole 9 is at the center of the bottom of the drainage bin 8, the drainage hole 9 is directly above the drainage groove 10, and the discharge pipe 13 is at the center of the bottom of the drainage groove 10. The whole process is energy-saving and environmentally friendly, and the quality of the shell and product is improved. The large height difference between the structures avoids the backflow of wax liquid, and the dewaxing process is stable to improve the operating efficiency. During the separation process, multiple observation windows 25 facilitate multi-angle viewing of the interior of the low-temperature dewaxing chamber 1 and the dewaxing process, and the fill light 26 effectively supplements the light source to improve the clarity of the viewing process.

[0031] While the present invention has been shown and described with reference to preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein within the scope of the claims.

Claims

1. A low-temperature wax dewaxing device for valve casting, comprising a low-temperature dewaxing chamber (1) and a medium-temperature dewaxing chamber (2), characterized in that: The top of the medium-temperature dewaxing chamber (2) is fixedly connected with a transmission pipe (3), which is connected to the low-temperature dewaxing chamber (1). A loading rack (4) is placed inside the low-temperature dewaxing chamber (1). An inner groove (5) is provided on the top of the loading rack (4). A placement plate (6) is provided inside the inner groove (5). Multiple mold shells are placed on the top of the placement plate (6). A leakage hole (7) is provided on the top of the placement plate (6). There are multiple leakage holes (7). A drainage bin (8) is provided at the bottom of the placement plate (6). A drainage hole (9) is provided at the bottom of the drainage bin (8). A drainage groove (10) is provided inside the low-temperature dewaxing chamber (1). The drainage hole (9) is directly above the drainage groove (10). A built-in groove (11) is provided inside the low-temperature dewaxing chamber (1). A static barrel (12) is provided inside the built-in tank (11), a discharge pipe (13) is provided at the bottom of the drainage tank (10), the discharge pipe (13) reaches the inside of the static barrel (12), a first valve (14) is provided on the side surface of the discharge pipe (13), an exhaust pipe (15) is fixedly connected to the top of the low-temperature dewaxing chamber (1), a second valve (16) is provided on the side surface of the exhaust pipe (15), a third valve (17) is provided on the side surface of the transmission pipe (3), a pressure pump (18) is provided on the top of the low-temperature dewaxing chamber (1), a warehouse door (19) is provided on the side of the low-temperature dewaxing chamber (1), a transfer platform (20) is fixedly connected to the side of the low-temperature dewaxing chamber (1), and a hydraulic cargo elevator (21) is provided on the side of the transfer platform (20).

2. A low-temperature wax dewaxing device for valve casting according to claim 1, characterized in that: The bottom of the loading frame (4) is provided with a plurality of moving wheels (22). The side of the loading frame (4) is fixedly connected with a column (23). There are two columns (23). The inner side of the column (23) is fixedly connected with a handrail (24).

3. The low-temperature wax dewaxing device for valve casting according to claim 1, characterized in that: The low-temperature dewaxing chamber (1) is provided with an observation window (25) on the front side, and an observation window (25) is also provided on the left side of the low-temperature dewaxing chamber (1). A fill light (26) is provided inside the low-temperature dewaxing chamber (1).

4. The low-temperature wax dewaxing device for valve casting according to claim 1, characterized in that: A drainage cover (27) is inserted into the drainage groove (10), a filter screen (28) is fixedly connected to the inside of the drainage cover (27), a retaining edge (29) is fixedly connected to the outside of the drainage cover (27), and a handle (30) is fixedly connected to the top of the retaining edge (29).

5. The low-temperature wax dewaxing device for valve casting according to claim 4, characterized in that: There are two handles (30), the edges of the handles (30) are provided with rounded corners (31), the sides of the retaining edge (29) are also provided with rounded corners (31), and the bottom of the drainage cover (27) is provided with a cut corner (32).

6. The low-temperature wax dewaxing device for valve casting according to claim 1, characterized in that: The hydraulic freight elevator (21) is provided with a lifting plate (33) inside, and a hydraulic cylinder (34) is installed on the top of the lifting plate (33). There are multiple hydraulic cylinders (34), and the piston rods of the multiple hydraulic cylinders (34) are connected to the top of the hydraulic freight elevator (21). The side of the lifting plate (33) is fixedly connected with an auxiliary slope (35).

7. The low-temperature wax dewaxing device for valve casting according to claim 6, characterized in that: The top of the lifting plate (33) is fixedly connected with a baffle (36), and there are two baffles (36). The two baffles (36) are located inside the plurality of hydraulic cylinders (34). The surface of the baffle (36) is provided with a plurality of through holes (37).

8. The low-temperature wax dewaxing device for valve casting according to claim 6, characterized in that: The hydraulic freight elevator (21) is provided with a chute (38) on the side, and a slider (39) is fixedly connected to the side of the lifting plate (33). The slider (39) is inside the chute (38), and there are multiple sliders (39) and chute (38) respectively.

Images