Sand mold for high nickel alloy butterfly valve body

Abstract

The application discloses a sand mold for a high-nickel alloy butterfly valve body, which comprises mold frames, wherein the mold frames are provided with heating belts on outer surfaces thereof. When the sand mold is used, casting sand is poured into the mold frames, and the mold frames are covered with gland covers after the pouring. At this time, the casting sand is effectively compacted under the pressing action of the reinforcing plates, so that the gap between the particles of the casting sand is prevented from being too large, and the surface of the formed part is prevented from being rough. After the casting sand is compacted, the mold frames are turned over, so that the supporting assemblies are in contact with the ground for supporting. At this time, the stable bottom plates are pulled outwards, the stable bottom plates are opened, the module of the butterfly valve body is taken out, a cavity is formed, and the two mold frames are matched with each other in the same way. When the sand mold is processed, the temperature sensor detects the temperature inside the casting sand, and transmits the data to the controller for comparison with the threshold value of the controller.

Description

Technical Field

[0001] This invention relates to the field of metal processing technology, specifically to a sand mold for a high-nickel alloy butterfly valve body. Background Technology

[0002] Butterfly valves, also known as flap valves, are a type of simple regulating valve that can be used for on / off control of low-pressure pipeline media. A butterfly valve is a type of valve in which the closing element (valve disc or butterfly plate) is a disc that rotates around the valve shaft to achieve opening and closing. Nickel has good mechanical, physical and chemical properties. Adding suitable elements can improve its oxidation resistance, corrosion resistance, high-temperature strength and some physical properties. Therefore, nickel alloys are often used to make butterfly valve bodies.

[0003] In the prior art, such as Chinese Patent No. CN107755631A, a casting sand mold is disclosed, belonging to the field of mechanical device design technology. It includes an upper mold, a protrusion, square holes, a flange, a lower mold, and a hinge. The upper mold is welded from steel plates. The protrusion is welded to the lower surface of the upper mold. The top plate of the upper mold is evenly machined with sixteen square holes. The upper mold and the lower mold are connected by a hinge. The bottom plate of the lower mold is evenly machined with sixteen square holes. The right ends of the upper mold and the lower mold can be fixed by a snap fastener connection. The casting sand mold disclosed in this invention has a simple structure, is easy to operate, and is easy to lock. The upper mold is easy to manufacture and has low cost. The sand mold is easy to form. The positioning between the upper mold and the lower mold is accurate. The hinge is set on the left side between the mating surfaces of the upper mold and the lower mold, with three hinges evenly arranged. The connection between the upper mold and the lower mold is reliable, the force is balanced, and the movement is flexible.

[0004] However, in the existing technology, there are many ways to manufacture butterfly valve bodies. Among them, the use of sand molds has the advantage of low cost and is therefore widely used. Sand molds are made by placing a finished butterfly valve body model in sand, filling the model with sand, removing the model from the box, and then pouring molten steel into it to achieve casting. However, high-nickel alloys have high temperature requirements during casting. If the casting temperature is too low, air bubbles are easily generated, resulting in poor quality of the finished product.

[0005] Therefore, we propose a sand mold for high-nickel alloy butterfly valve bodies to solve the problems mentioned above. Summary of the Invention

[0006] The purpose of this invention is to provide a sand mold for a high-nickel alloy butterfly valve body, in order to solve the problem mentioned in the background art that the high-nickel alloy requires high temperature during casting, and that too low a casting temperature easily produces air bubbles, resulting in poor quality of the finished product.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a sand mold for a high-nickel alloy butterfly valve body, comprising: a mold frame, wherein two mold frames are provided, each mold frame has a heating band on its outer surface, a pressure cap is slidably installed on opposite sides of each mold frame, a reinforcing pressure plate is fixedly connected to opposite sides of each pressure cap, casting sand is provided on the inner walls of each mold frame, and a cavity is opened on opposite sides of each casting sand; and a control component, wherein two control components are provided, each control component is fixedly installed on one side of each mold frame, each control component includes a protective box, a partition plate is fixedly installed between the inner walls of each protective box, a controller is provided on the top of each partition plate, a temperature sensor is provided on the bottom of each partition plate, and an outer cover is rotatably connected to the outer surface of each protective box via a hinge.

[0008] Preferably, positioning blocks are fixedly connected to the top and bottom of the two protective boxes, multiple connection holes are opened on one side of the two protective boxes, negative magnets are adhered to the outer surface of the two protective boxes near one edge, positive magnets are adhered to the outer surface of the two outer covers near the edge, and the outer surfaces of the two negative magnets are magnetically connected to the outer surfaces of the two positive magnets respectively.

[0009] Preferably, both heating bands are provided with protective shells, and one side of each protective shell is fixedly connected to the outer surface of the two mold frames.

[0010] Preferably, a stabilizing component is fixedly connected to each of the two mold frames on opposite sides, each of the two stabilizing components includes a slide rail, a slide frame is slidably installed on the inner wall of each of the two slide rails, and a stabilizing base plate is fixedly installed on each of the opposite sides of each of the two slide frames.

[0011] Preferably, multiple connecting blocks are fixedly connected to both sides of the two mold frames, multiple vent holes are opened on the outer surface of the two pressure caps, an injection port is opened at the center of the outer surface of one of the pressure caps, and a conical injection pipe is embedded in the center of the interior of one of the casting sands.

[0012] Preferably, two support components are fixedly connected to the outer surfaces of the two pressure caps, and each of the four support components includes a support plate. Multiple anti-slip strips are fixed to one side of each of the four support plates, and two mounting blocks are fixed to the other side of each of the four support plates.

[0013] Preferably, the outer surfaces of the two pressure caps are provided with slots near the four edges, and the four outer surfaces of the two mold frames are fixedly installed with locking components.

[0014] Preferably, each locking assembly includes two fixing blocks, and a rotating rod is rotatably embedded between the two fixing blocks, with a stop block fixed at both ends of the rotating rod.

[0015] Preferably, connecting bent rods are welded to the outer surface of the rotating rod near both ends, and a reinforcing rod is welded to the center between the two connecting bent rods.

[0016] Preferably, a retaining shaft is welded to one end of the two connecting rods, and a roller is movably fitted on the outer surface of the retaining shaft, with the outer surface of the roller engaging with the inner wall of the retaining groove.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] 1. During use, pour casting sand into the mold frame. After filling, cover the mold frame with the pressure cap. Under the pressing action of the reinforcing plate, the casting sand is effectively compacted to prevent excessive gaps between the sand particles, which would cause a rough surface of the molded part. After the casting sand is compacted, flip the mold frame over so that the support components contact the ground for support. Then, pull out the stabilizing base plate to facilitate the removal of the butterfly valve body module, forming a cavity. Matching cavities are made in the same way in the two mold frames. During processing, the temperature inside the casting sand is detected by a temperature sensor and the data is transmitted to the controller. The temperature is compared with the controller's threshold. If the temperature is not reached, the controller controls the heating belt to turn on for heating. When the set temperature is reached, the heating automatically stops. This solves the problem that high-nickel alloys are prone to bubbles when the temperature is too low during casting, resulting in poor quality of the finished product. The two cavities are aligned together during use to realize the processing of the butterfly valve body by the sand mold.

[0019] 2. During use, the controller and temperature sensor are installed in a protective box, which effectively prevents damage to the controller and temperature sensor caused by molten metal overflow during injection. By attracting the positive and negative magnets, the outer cover is prevented from opening automatically when closed. The heating element is protected by a heat-insulating protective shell, which prevents burns to operators when the heating element is heating and prevents molten metal overflow from damaging the heating element. The slide rail and slide frame have a matching three-sided enclosed structure, which allows the stable base plate to slide at an opening in the mold frame. The tapered injection pipe makes molten metal injection more convenient. The ventilation holes allow the high temperature generated by the casting sand during molten metal injection to dissipate in time. The anti-slip strips provide anti-slip function, while the support plate contacts the ground to prevent the locking components from contacting the ground.

[0020] 3. When in use, engage the locking assembly with the slot to quickly and efficiently compact the cast sand. The stop block prevents the rotating rod from detaching by blocking one side of the two fixed blocks. With the reinforcing rod connecting the two connecting bent rods, the stability of the connecting bent rods during engagement is enhanced. Since the roller can rotate, the friction generated during engagement is reduced, extending the service life. Attached Figure Description

[0021] Figure 1 This is a front perspective view of a sand mold for a high-nickel alloy butterfly valve body according to the present invention;

[0022] Figure 2 This is a bottom perspective view of a sand mold for a high-nickel alloy butterfly valve body according to the present invention;

[0023] Figure 3 For the present invention Figure 1 Enlarged view of point A in the middle;

[0024] Figure 4 This is a three-dimensional view of the locking assembly of a sand mold for a high-nickel alloy butterfly valve body according to the present invention.

[0025] Figure 5 This is a bottom perspective view of a portion of the structure of a sand mold for a high-nickel alloy butterfly valve body according to the present invention.

[0026] Figure 6 This is a top perspective view of a portion of the structure of a sand mold for a high-nickel alloy butterfly valve body according to the present invention;

[0027] Figure 7 For the present invention Figure 6 Enlarged view at point B in the middle;

[0028] Figure 8 This is a three-dimensional view showing the structure of the control component part of a sand mold for a high-nickel alloy butterfly valve body according to the present invention.

[0029] In the picture:

[0030] 1. Mold frame; 2. Pressure cap; 3. Slot;

[0031] 4. Locking assembly; 401. Fixing block; 402. Rotating rod; 403. Stop block; 404. Connecting bent rod; 405. Reinforcing rod; 406. Locking shaft; 407. Roller;

[0032] 5. Vent hole; 6. Inlet;

[0033] 7. Support components; 701. Mounting block; 702. Support plate; 703. Anti-slip strip;

[0034] 8. Protective outer casing; 9. Connecting block;

[0035] 10. Stabilizing components; 1001. Slide rail; 1002. Stabilizing base plate; 1003. Slide frame;

[0036] 11. Control components; 1101. Protective box; 1102. Outer cover; 1103. Positive magnet; 1104. Negative magnet; 1105. Connection hole; 1106. Controller; 1107. Positioning block; 1108. Temperature sensor; 1109. Separator plate;

[0037] 12. Heating belt; 13. Casting sand; 14. Conical injection pipe; 15. Cavity; 16. Reinforcing pressure plate. Detailed Implementation

[0038] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] Please see Figure 1-8This invention provides a technical solution: a sand mold for a high-nickel alloy butterfly valve body, comprising: a mold frame 1, of which two mold frames 1 are provided, each mold frame 1 having a heating band 12 on its outer surface, a pressure cap 2 slidably mounted on opposite sides of each mold frame 1, a reinforcing pressure plate 16 fixedly connected to opposite sides of each pressure cap 2, casting sand 13 on the inner walls of each mold frame 1, and a cavity 15 opened on opposite sides of each casting sand 13; and a control component 11, of which two control components 11 are provided, each control component 11 being fixedly mounted on one side of each of the two mold frames 1, and each control component 11 including a protective box. 1101, a partition plate 1109 is fixedly installed between the inner walls of the two protective boxes 1101. A controller 1106 is installed on the top of each of the two partition plates 1109, and a temperature sensor 1108 is installed on the bottom of each of the two partition plates 1109. An outer cover 1102 is rotatably connected to the outer surface of each of the two protective boxes 1101 via a hinge. In use, first, the sliding frame 1003 is slidably inserted into the slide rail 1001, so that the stable base plate 1002 is tightly installed at one opening of the mold frame 1, with the other opening facing upwards. The butterfly valve body module is placed on the stable base plate 1002, and then the mold frame 1 is moved towards the bottom. Pour casting sand 13 into the mold frame 1 until it is full. Then, cover the mold frame 1 with the pressure cap 2. At this time, under the pressing action of the reinforcing pressure plate 16, the casting sand 13 is effectively compressed to prevent the gaps between the casting sand 13 particles from being too large, which would cause the surface of the molded part to be rough. After the casting sand 13 is compressed, flip the mold frame 1 over so that the support component 7 contacts the ground for support. At this time, pull out the stabilizing base plate 1002 to open the stabilizing base plate 1002 to facilitate the removal of the butterfly valve body module, forming cavity 15. Make matching cavities 15 in the two mold frames 1 in the same way. By connecting the temperature sensor 1108, heating belt 12 and controller 110 6. Electrical connection: The controller 1106 is set to the optimal processing temperature threshold. During processing, the temperature sensor 1108 detects the temperature inside the casting sand 13 and transmits the data to the controller 1106. The temperature is compared with the threshold of the controller 1106. If the temperature is not reached, the controller 1106 controls the heating belt 12 to turn on for heating. When the set temperature is reached, the heating belt automatically stops. This solves the problem that if the temperature is too low during the casting of high-nickel alloy, bubbles will easily be generated, resulting in poor quality of the finished product. The two cavities 15 correspond to each other during use, thereby realizing the processing of the butterfly valve body by the sand mold.

[0040] like Figure 8As shown, positioning blocks 1107 are fixedly connected to the top and bottom of the two protective boxes 1101. Multiple connection holes 1105 are opened on one side of each of the two protective boxes 1101. Negative magnets 1104 are attached to the outer surface of each of the two protective boxes 1101 near one edge. Positive magnets 1103 are attached to the outer surface of each of the two outer covers 1102 near the edge. The outer surfaces of the two negative magnets 1104 are magnetically connected to the outer surfaces of the two positive magnets 1103 respectively. The controller 1106 and the temperature sensor 1108 are installed through the protective boxes 1101, which can effectively prevent the overflow of molten liquid during injection from damaging the controller 1106 and the temperature sensor 1108. By attracting the positive magnets 1103 and the negative magnets 1104, the outer covers 1102 can be prevented from opening automatically when closed.

[0041] like Figure 2 As shown, both heating bands 12 are provided with protective shells 8. One side of each of the two protective shells 8 is fixedly connected to the outer surface of the two mold frames 1. The heating bands 12 are protected by the protective shells 8 with heat insulation effect, which can prevent the heating bands 12 from burning the operators when heating and prevent the molten liquid from overflowing and damaging the heating bands 12.

[0042] like Figure 2 , Figure 6 and Figure 7 As shown, each of the two mold frames 1 has a fixed stabilizing component 10 on one side of its opposite side. Each of the two stabilizing components 10 includes a slide rail 1001. Each of the two slide rails 1001 has a slide frame 1003 slidably mounted on the inner wall of its inner side. Each of the two slide frames 1003 has a fixed stabilizing base plate 1002 on one side of its opposite side. The slide rails 1001 and slide frames 1003 have a matching three-sided enclosing structure, which allows the stabilizing base plate 1002 to be slidably mounted at an opening of the mold frame 1.

[0043] like Figure 1 As shown, multiple connecting blocks 9 are fixedly connected to both sides of the two mold frames 1, and multiple vent holes 5 are opened on the outer surface of the two pressure caps 2. An injection port 6 is opened at the center of the outer surface of one of the pressure caps 2, and a conical injection tube 14 is embedded in the center of the interior of one of the casting sand 13. By aligning the connecting blocks 9 at the same position on the outer surface of the two mold frames 1 and fixing them with bolts, the molten liquid is injected from the injection port 6 into the conical injection tube 14 and finally reaches the cavity 15. The conical injection tube 14 makes the injection of molten liquid more convenient. Through the ventilation effect of the vent holes 5, the high temperature generated by the casting sand 13 during the injection of molten liquid can be dissipated in time.

[0044] like Figure 1As shown, two support components 7 are fixedly connected to the outer surfaces of the two pressure caps 2. Each of the four support components 7 includes a support plate 702. Multiple anti-slip strips 703 are fixed on one side of each of the four support plates 702, and two mounting blocks 701 are fixed on the other side of each of the four support plates 702. The anti-slip strips 703 play an anti-slip role, while the support plates 702 contact the ground to prevent the locking components 4 from contacting the ground.

[0045] like Figure 1-4 As shown, slots 3 are provided on the outer surfaces of the two pressure caps 2 near the four edges, and locking components 4 are fixedly installed on the four outer surfaces of the two mold frames 1. The locking components 4 are engaged with the slots 3 to quickly and efficiently compact the casting sand 13.

[0046] like Figure 3 and Figure 4 As shown, each locking assembly 4 includes two fixing blocks 401. A rotating rod 402 is rotatably embedded between the two fixing blocks 401. Both ends of the rotating rod 402 are fixed with a stop block 403. The stop block 403 blocks one side of the two fixing blocks 401 to prevent the rotating rod 402 from disengaging.

[0047] like Figure 3 and Figure 4 As shown, connecting bent rods 404 are welded to both ends of the outer surface of the rotating rod 402. A reinforcing rod 405 is welded to the center between the two connecting bent rods 404. The connection of the reinforcing rod 405 to the two connecting bent rods 404 can enhance the stability of the connecting bent rods 404 when they are engaged.

[0048] like Figure 1-4 As shown, a retaining shaft 406 is welded to one end of the two connecting bent rods 404. A roller 407 is movably sleeved on the outer surface of the retaining shaft 406. The outer surface of the roller 407 engages with the inner wall of the groove 3. By engaging the retaining shaft 406 with the groove 3, the roller 407 can rotate, which can reduce the friction generated during engagement and extend the service life.

[0049] The usage and working principle of this device are as follows: First, slide the sliding frame 1003 into the slide rail 1001, ensuring the stable base plate 1002 is tightly installed at one opening of the mold frame 1, with the other opening facing upwards. Place the butterfly valve body module on the stable base plate 1002, pour casting sand 13 into the mold frame 1, and after filling, cover the mold frame 1 with the pressure cap 2. At this time, under the pressing action of the reinforcing pressure plate 16, the casting sand 13 is effectively compressed, preventing excessive gaps between the casting sand particles and thus avoiding a rough surface on the molded part. After the casting sand 13 is compressed, flip the mold frame 1 over so that the support component 7 contacts the ground for support. Then, pull the stable base plate 1002 outwards, opening the stable base plate 1002. 02. A module for easy removal of the butterfly valve body is formed into cavity 15. Matching cavities 15 are made in the same way within the two mold frames 1. The temperature sensor 1108, heating belt 12, and controller 1106 are electrically connected. The controller 1106 is set with the optimal processing temperature threshold. During processing, the temperature sensor 1108 detects the temperature inside the casting sand 13 and transmits the data to the controller 1106. The temperature is compared with the threshold of the controller 1106. If the temperature is not reached, the controller 1106 controls the heating belt 12 to turn on for heating. When the set temperature is reached, the heating automatically stops. The two cavities 15 are aligned together during use, thereby realizing the processing of the butterfly valve body by the sand mold. Box 1101 is used to install controller 1106 and temperature sensor 1108, which can effectively prevent the overflow of molten liquid during injection from damaging controller 1106 and temperature sensor 1108. By attracting positive magnet 1103 and negative magnet 1104, it can prevent the outer cover 1102 from opening automatically when closed. The heating band 12 is protected by the heat-insulating protective shell 8. The slide rail 1001 and slide frame 1003 have a matching three-sided enclosure structure, which allows the stable base plate 1002 to slide on an opening of the mold frame 1. By aligning the connecting blocks 9 with the same position on the outer surface of the two mold frames 1, they are fixed with bolts. Molten liquid is injected from injection port 6 into the conical injection tube 14. Finally reaching the cavity 15, the conical injection pipe 14 makes the injection of molten metal more convenient. Through the ventilation hole 5, the high temperature generated by the casting sand 13 during the injection of molten metal can be dissipated in time. The anti-slip strip 703 provides anti-slip function, while the support plate 702 contacts the ground to prevent the locking assembly 4 from contacting the ground. The locking assembly 4 is engaged with the slot 3, which quickly and efficiently compacts the casting sand 13. The stop block 403 blocks one side of the two fixed blocks 401 to prevent the rotating rod 402 from disengaging. With the reinforcing rod 405 connecting the two connecting bent rods 404, the stability of the connecting bent rods 404 during engagement is enhanced. By engaging the locking shaft 406 at the position corresponding to the slot 3, the roller 407 can rotate.

[0050] The wiring diagrams of the controller 1106, temperature sensor 1108 and heating belt 12 in this invention are common knowledge in the field, and their working principles are known technologies. The appropriate model is selected according to actual use. Therefore, the control method and wiring layout of the controller 1106, temperature sensor 1108 and heating belt 12 will not be explained in detail.

[0051] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A sand mold for a high-nickel alloy butterfly valve body, characterized in that, include: Mold frame (1), two mold frames (1) are provided, the outer surfaces of the two mold frames (1) are provided with heating bands (12), the opposite sides of the two mold frames (1) are slidably installed with pressure caps (2), the opposite sides of the two pressure caps (2) are fixedly connected with reinforcing pressure plates (16), the inner walls of the two mold frames (1) are provided with casting sand (13), and the opposite sides of the two casting sands (13) are provided with cavities (15); Control components (11), two control components (11) are provided, and the two control components (11) are respectively fixedly installed on one side of the two mold frames (1). Each of the two control components (11) includes a protective box (1101). A partition plate (1109) is fixedly installed between the inner walls of the two protective boxes (1101). A controller (1106) is provided on the top of each of the two partition plates (1109). A temperature sensor (1108) is provided on the bottom of each of the two partition plates (1109). An outer cover (1102) is rotatably connected to the outer surface of each of the two protective boxes (1101) through a hinge. A stabilizing component (10) is fixedly connected to one side of each of the two mold frames (1). Each of the two stabilizing components (10) includes a slide rail (1001). A slide frame (1003) is slidably installed on the inner wall of each of the two slide rails (1001). A stabilizing base plate (1002) is fixedly installed on one side of each of the two slide frames (1003). A slot (3) is provided on the outer surface of each of the two pressure caps (2) near the four edges. A locking component (4) is fixedly installed on the four outer surfaces of each of the two mold frames (1).

2. The sand mold for the high-nickel alloy butterfly valve body according to claim 1, characterized in that: Positioning blocks (1107) are fixedly connected to the top and bottom of the two protective boxes (1101). Multiple connection holes (1105) are opened on one side of the two protective boxes (1101). Negative magnets (1104) are attached to the outer surface of the two protective boxes (1101) near one edge. Positive magnets (1103) are attached to the outer surface of the two outer covers (1102) near the edge. The outer surfaces of the two negative magnets (1104) are magnetically connected to the outer surfaces of the two positive magnets (1103).

3. The sand mold for the high-nickel alloy butterfly valve body according to claim 2, characterized in that: The two heating bands (12) are each provided with a protective shell (8), and one side of each of the two protective shells (8) is fixedly connected to the outer surface of the two mold frames (1).

4. The sand mold for the high-nickel alloy butterfly valve body according to claim 3, characterized in that: Multiple connecting blocks (9) are fixedly connected to both sides of the two mold frames (1), and multiple vent holes (5) are opened on the outer surface of the two pressure caps (2). An injection port (6) is opened at the center of the outer surface of one of the pressure caps (2), and a conical injection pipe (14) is embedded in the center of the interior of one of the casting sands (13).

5. The sand mold for the high-nickel alloy butterfly valve body according to claim 4, characterized in that: Two support components (7) are fixedly connected to the outer surfaces of the two pressure caps (2). Each of the four support components (7) includes a support plate (702). Multiple anti-slip strips (703) are fixed on one side of each of the four support plates (702). Two mounting blocks (701) are fixed on the other side of each of the four support plates (702).

6. The sand mold for the high-nickel alloy butterfly valve body according to claim 5, characterized in that: Each of the locking components (4) includes two fixing blocks (401), and a rotating rod (402) is rotatably embedded between the two fixing blocks (401). Both ends of the rotating rod (402) are fixed with a stop block (403).

7. The sand mold for the high-nickel alloy butterfly valve body according to claim 6, characterized in that: The outer surface of the rotating rod (402) is welded with connecting bent rods (404) near both ends, and a reinforcing rod (405) is welded between the two connecting bent rods (404) near the center.

8. The sand mold for the high-nickel alloy butterfly valve body according to claim 7, characterized in that: A retaining pin (406) is welded to one end of the two connecting rods (404) respectively. A roller (407) is movably fitted on the outer surface of the retaining pin (406). The outer surface of the roller (407) engages with the inner wall of the groove (3).

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