Nodular cast iron valve body forming die

Abstract

The utility model discloses a nodular cast iron valve body forming die which comprises a first die body, a cooling groove is formed in the inner wall of the first die body, a second die body is arranged on the top of the first die body, a pouring gate is formed in the top of the second die body, and the nodular cast iron valve body forming die further comprises a die releasing device and a control device. The first mold is mounted on the inner wall of the first mold; the exhaust device is mounted at the top of the second mold; wherein the demolding device is used for conveniently demolding the cooled and molded valve body, and the exhaust device can be used for emptying air in the first mold and the second mold as soon as possible. According to the nodular cast iron valve body forming mold, the cooled valve body in the first mold is pushed outwards through the demolding device, the valve body can be taken out without turning over the heavy first mold, the valve body taking-out process is time-saving, labor-saving and simple and convenient, and therefore the casting efficiency of the valve body is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of valve production molds, in particular to a ductile iron valve body forming mold. Background Art

[0002] Valves are pipe accessories used to open and close pipelines, control flow direction, and adjust and control the parameters of the conveying medium, such as temperature, pressure, and flow. According to their functions, they can be divided into shut-off valves, check valves, regulating valves, etc. Valves are control components in fluid conveying systems, and have functions such as shut-off, regulation, flow diversion, prevention of backflow, pressure stabilization, flow diversion, or overflow pressure relief. Valves used in fluid control systems range from the simplest shut-off valves to various valves used in extremely complex automatic control systems.

[0003] At present, when casting a ductile iron valve body, starting the electric push rod can drive the limit plate 4 to move downward. When the limit plate moves, the sliding rod at the bottom slides in the slide groove on one side of the baffle, so that the two extrusion rods are close to each other. When they are close, the extrusion rods abut against each other and squeeze the spring to deform it, which can reduce the pressure of the abutment between them and improve the positioning accuracy between the mold bodies to avoid deviation.

[0004] When using the traditional ductile iron valve body forming mold, the operator closes the upper and lower molds, pours the molten iron into the mold from the casting port, and after the internal molten iron cools into the valve body, removes the top mold and turns the first mold to take out the internal valve body. Since the first mold is relatively heavy, the method of flipping the first mold to take out the valve body is relatively cumbersome, thereby reducing the casting efficiency of the valve body. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a ductile iron valve body forming mold, which solves the problem that when using the traditional ductile iron valve body forming mold, the operator closes the upper and lower molds, pours the molten iron into the mold from the casting port, and after the internal molten iron is cooled into a valve body, the top mold is removed, and the valve body inside can be taken out by turning the first mold. Since the first mold is relatively heavy, the method of flipping the first mold to take out the valve body is relatively cumbersome, thereby reducing the casting efficiency of the valve body.

[0006] To achieve the above object, the utility model is realized by the following technical solutions: A ductile iron valve body forming die, including a first die, a cooling groove is installed on the inner wall of the first die, a second die is arranged on the top of the first die, a casting port is installed on the top of the second die, and the ductile iron valve body forming die further includes: A demolding device installed on the inner wall of the first die; An exhaust device installed on the top of the second die; Wherein, the demolding device facilitates the demolding of the valve body after cooling and forming, and the exhaust device can quickly evacuate the air inside the first die and the second die.

[0007] Preferably, a limiting rod is installed on the top of the first die, and the outer wall of the limiting rod is movably connected to the inner wall of the second die.

[0008] Preferably, the demolding device includes: A sliding rod inserted into the inner wall of the first die; A rack installed at one end of the sliding rod and slidably clamped with the inner wall of the first die; Two gears are arranged, both meshing above the rack; Two circular plates are arranged, respectively installed on the backs of the two gears and rotatably connected to the inner wall of the first die; Two circular rods are arranged, respectively installed on the inner walls of the two circular plates; An arc groove is slidably clamped on the outer walls of the two circular rods; A push plate is installed above the arc groove and inserted into the inner wall of the first die; Wherein, the sliding rod drives the circular plate on the back of the gear to rotate through the rack, and the circular plate drives the push plate above the arc groove to move upward through the circular rod, so as to demold the formed valve body.

[0009] Preferably, the outer wall of the first die is fixedly connected with a side plate, and a bolt is threadedly connected to the inner wall of the side plate.

[0010] Preferably, the exhaust device includes: A housing installed above the second die; An air inlet pipe installed on the inner wall of the housing and extending into the second die; Two baffles are arranged, both rotatably connected to the inner wall of the housing through a pin shaft; Two torsion springs are arranged, respectively installed on the outer walls of the baffles and fixedly connected to the inner wall of the housing; A sliding plate is installed on the inner wall of the housing; A pull rod is installed on the outer wall of the sliding plate and inserted into the inner wall of the housing; Wherein, when the pull rod pulls the sliding plate to move outwards, a negative pressure state appears inside the housing, the air inside the second die pushes the lower baffle to rotate, and the air inside the second die enters the housing through the air inlet pipe.

[0011] Beneficial effects

[0012] The utility model provides a forming die for a ductile iron valve body, which has the following beneficial effects: for the forming die of the ductile iron valve body, the cooled valve body in the first die is pushed outwards by a demoulding device, and the valve body can be taken out without turning over the heavy first die. The process of taking out the valve body is time-saving, labor-saving and relatively simple, thus improving the casting efficiency of the valve body.

[0013] Through the exhaust device, the air inside the two dies is pumped out through the second die, making the inside of the two dies in a negative pressure state. Molten iron can quickly enter the inside of the two dies from the casting gate, preventing the molten iron from not entering the die easily in the later stage of casting. Moreover, after the air is exhausted, there will be no air bubbles between the molten iron and the die, improving the casting quality of the valve body. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic structural diagram of the utility model;

[0015] Figure 2 is Figure 1 a cross-sectional view of

[0016] Figure 3 is Figure 2 a schematic structural diagram of the housing, the air inlet pipe and the baffle plate in

[0017] Figure 4 is Figure 1 a schematic structural diagram of the housing, the air inlet pipe and the pull rod in

[0018] Figure 5 is Figure 2 a schematic structural diagram of the sliding rod, the rack and the gear in

[0019] In the figure: 1. First die, 2. Demoulding device, 201. Sliding rod, 202. Rack, 203. Gear, 204. Circular plate, 205. Circular rod, 206. Arc groove, 207. Push plate, 3. Cooling groove, 4. Limiting rod, 5. Second die, 6. Exhaust device, 601. Housing, 602. Air inlet pipe, 603. Baffle plate, 604. Torsion spring, 605. Slide plate, 606. Pull rod, 7. Casting gate, 8. Side plate, 9. Bolt. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0021] Those skilled in the art shall connect the components in this case in sequence. For the specific connection and operation sequence, reference should be made to the following working principle. The detailed connection means are well-known techniques in the art. The following mainly introduces the working principle and process.

[0022] When using a traditional ductile iron valve body forming die, after the operator closes the upper and lower dies, the molten iron is poured into the die cavity from the casting gate. After the iron inside cools into a valve body, the top die is removed, and the first die can be rotated to take out the valve body inside. Since the first die is relatively heavy, the method of rotating the first die to take out the valve body is rather cumbersome, thus reducing the casting efficiency of the valve body.

[0023] In view of this, the present utility model provides a ductile iron valve body forming die. The cooled valve body in the first die is pushed out by a demoulding device, and the valve body can be taken out without rotating the heavy first die. The process of taking out the valve body is time-saving and labor-saving and relatively simple, thereby improving the casting efficiency of the valve body.

[0024] Example 1: As can be seen from Figure 1 、 2 、3, 4 and 5, a ductile iron valve body forming die includes a first die 1. A cooling groove 3 is installed on the inner wall of the first die 1. A second die 5 is arranged on the top of the first die 1. A casting gate 7 is installed on the top of the second die 5. The ductile iron valve body forming die further includes: a demoulding device 2 installed on the inner wall of the first die 1; an exhaust device 6 installed on the top of the second die 5. Among them, the demoulding device 2 facilitates demoulding of the cooled and formed valve body, and the exhaust device 6 can quickly evacuate the air inside the first die 1 and the second die 5.

[0025] In the specific implementation process, it is particularly noted that the demoulding device 2 facilitates demoulding of the valve body, and the exhaust device 6 evacuates the gas inside the two dies through the second die 5.

[0026] Furthermore, a limiting rod 4 is installed on the top of the first die 1, and the outer wall of the limiting rod 4 is movably connected to the inner wall of the second die 5.

[0027] In the specific implementation process, it is particularly noted that the first die 1 restricts the moving direction of the second die through the limiting rod 4, facilitating the closing of the first die 1 and the second die 5.

[0028] Specifically, when using this ductile iron valve body forming mold, the second mold 5 and the first mold 1 are closed by inserting the limiting rod 4 into the interior of the second mold 5. Molten iron is poured into the two molds from the casting port 7. At the same time, the air inside the two molds is extracted outward through the exhaust device 6, which facilitates the rapid filling of the molten iron into the interior of the mold after melting. Water pipes are connected to both sides of the cooling tank 3, and cooling water is introduced into the interior of the cooling tank 3 to cool the valve body in the two molds. The demolding device 2 is used to demold the cooled and formed valve body.

[0029] Embodiment 2: From Figure 2 and 5 it can be seen that the demolding device 2 includes: a slide bar 201 inserted into the inner wall of the first mold 1; a rack 202 installed at one end of the slide bar 201 and slidably clamped with the inner wall of the first mold 1; two gears 203 both meshed above the rack 202; two circular plates 204 respectively installed on the backs of the two gears 203 and rotatably connected to the inner wall of the first mold 1; two circular rods 205 respectively installed on the inner walls of the two circular plates 204; an arc groove 206 slidably clamped on the outer walls of the two circular rods 205; a push plate 207 installed above the arc groove 206 and inserted into the inner wall of the first mold 1. Among them, the slide bar 201 drives the circular plate 204 on the back of the gear 203 to rotate through the rack 202, and the circular plate 204 drives the push plate 207 at the top of the arc groove 206 to move upward through the circular rod 205, so as to demold the formed valve body.

[0030] In the specific implementation process, it is particularly worth noting that; pushing the slide bar 201 to move can drive the rack 202 to move, and then drive the circular plate 204 on the gear 203 to rotate through the rack 202. The circular plate 204 drives the push plate 207 to move upward through the cooperation of the circular rod 205 and the arc groove 206, and then can push the valve body inside the first mold 1 to move upward.

[0031] Furthermore, a side plate 8 is fixedly connected to the outer wall of the first mold 1, and a bolt 9 is threadedly connected to the inner wall of the side plate 8;

[0032] In the specific implementation process, it is particularly worth noting that after turning the bolt 9 to rotate, the first mold 1 is fixed through the side plate 8 to prevent the first mold 1 from moving during use;

[0033] Specifically, on the basis of the above-mentioned Embodiment 1, pushing the slide bar 201 to move, the slide bar 201 drives the gear 203 to rotate through the rack 202, the gear 203 drives the circular rod 205 to move through the circular plate 204, the circular rod 205 drives the push plate 207 to move upward through the arc groove 206, and the push plate 207 moves the formed valve body inside the first mold 1 outward for demolding.

[0034] Embodiment 3: From Figure 1, 2 As can be seen from FIGS. 3 and 4, the exhaust device 6 includes: a housing 601 installed above the second mold 5; an intake pipe 602 installed on the inner wall of the housing 601 and extending into the interior of the second mold 5; two baffles 603 rotatably connected to the inner wall of the housing 601 by pin shafts; two torsion springs 604 respectively installed on the outer walls of the baffles 603 and fixedly connected to the inner wall of the housing 601; a sliding plate 605 installed on the inner wall of the housing 601; a pull rod 606 installed on the outer wall of the sliding plate 605 and inserted into the inner wall of the housing 601. Among them, when the pull rod 606 pulls the sliding plate 605 to move outward, a negative pressure state appears on the inner wall of the housing 601, and the air inside the second mold 5 pushes the lower baffle 603 to rotate, and the air inside the second mold 5 enters the interior of the housing 601 through the intake pipe 602.

[0035] In the specific implementation process, it is particularly pointed out that pulling the pull rod 606 can drive the sliding plate 605 to move outward. The sliding plate 605 changes the interior of the housing 1 into a negative pressure state. The air inside the second mold 5 pushes the lower baffle 603 to rotate, and the air inside the second mold 5 enters the interior of the housing 1 through the intake pipe 603, thereby quickly exhausting the air inside the two molds.

[0036] Specifically, on the basis of the above-mentioned Embodiment 1, the staff pulls the pull rod 606 to drive the sliding plate 605 to move outward. The sliding plate 605 changes the interior of the housing 601 into a negative pressure state. The air inside the second mold 5 pushes the lower baffle 603 to rotate through the intake pipe 602, and at the same time compresses the lower torsion spring 604. The air enters the interior of the housing 601, pushes the pull rod 606 to drive the sliding plate 605 to move inward, the lower torsion spring 604 pushes the lower baffle 603 to reset, and the air inside the housing 601 pushes the upper baffle 603 to rotate. After the upper baffle 603 is opened, the air inside the housing 601 is discharged, thereby quickly discharging the air inside the two molds and facilitating the rapid entry of molten iron into the two molds.

[0037] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the said element.

[0038] In the present utility model, unless otherwise clearly stipulated and defined, terms such as "installation", "setting", "connection", "fixation", "swivel connection", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components or the interaction relationship between two components. Unless otherwise clearly defined, for those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0039] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A ductile iron valve body forming die, comprising a first die (1), characterized in that: The inner wall of the first mold (1) is provided with a cooling groove (3), the top of the first mold (1) is provided with a second mold (5), the top of the second mold (5) is provided with a casting port (7), and the ductile iron valve body molding mold further comprises: A demoulding device (2) installed on the inner wall of the first mold (1); An exhaust device (6) is installed on the top of the second mold (5); The demoulding device (2) facilitates demoulding of the valve body after cooling and forming, and the exhaust device (6) can exhaust the air inside the first mold (1) and the second mold (5) as quickly as possible.

2. The ductile iron valve body forming mold according to claim 1, characterized in that: A limiting rod (4) is installed on the top of the first mold (1), and the outer wall of the limiting rod (4) is movably connected to the inner wall of the second mold (5).

3. The ductile iron valve body forming mold according to claim 1, characterized in that: The demoulding device (2) comprises: A sliding rod (201) is inserted into the inner wall of the first mold (1); A rack (202) is mounted on one end of the slide bar (201) and is slidably engaged with the inner wall of the first mold (1); Two gears (203) are provided, both meshing with the top of the rack (202); Two circular plates (204) are provided, which are respectively mounted on the back sides of the two gears (203) and are rotatably connected to the inner wall of the first mold (1); Two round rods (205) are provided and respectively mounted on the inner walls of the two circular plates (204); The arc groove (206) is slidably engaged with the outer walls of the two round rods (205); A push plate (207) is installed above the arc groove (206) and plugged into the inner wall of the first mold (1); The sliding rod (201) drives the circular plate (204) on the back of the gear (203) to rotate through the rack (202), and the circular plate (204) drives the push plate (207) on the top of the arc groove (206) to move upward through the round rod (205), thereby demoulding the molded valve body.

4. The ductile iron valve body forming mold according to claim 1, characterized in that: The outer wall of the first mould (1) is fixedly connected to a side plate (8), and the inner wall of the side plate (8) is threadedly connected to a bolt (9).

5. The ductile iron valve body forming mold according to claim 1, characterized in that: The exhaust device (6) comprises: A housing (601) is installed above the second mold (5); an air inlet pipe (602) mounted on the inner wall of the housing (601) and extending to the interior of the second mold (5); Two baffles (603) are provided, and both are rotatably connected to the inner wall of the housing (601) via a pin shaft; Two torsion springs (604) are provided, respectively mounted on the outer wall of the baffle (603), and both are fixedly connected to the inner wall of the housing (601); A slide plate (605) is mounted on the inner wall of the housing (601); A pull rod (606) is installed on the outer wall of the slide plate (605) and plugged into the inner wall of the housing (601); When the pull rod (606) pulls the slide plate (605) to move outward, a negative pressure state appears on the inner wall of the shell (601), and the air inside the second mold (5) pushes the lower baffle (603) to rotate, and the air inside the second mold (5) enters the shell (601) through the air inlet pipe (602).

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