Manufacturing device and manufacturing method of low-temperature flat double gate valve

Abstract

The manufacturing device comprises an upper mold and a lower mold, an annular groove is formed in the middle of the top side of the upper mold, a pouring opening is formed in the annular groove, a plugging piece is arranged on the top side of the upper mold, a cavity is formed in the top side of the lower mold, and the sealing piece is arranged in the cavity. A mold opening and closing piece is arranged above the upper mold; and the plugging piece comprises a central groove. The invention relates to the technical field of flat double gate valves. When the manufacturing device and the manufacturing method of the low-temperature flat-plate double gate valve are used, the situation that additional protruding blocks appear after a valve seat is formed in a mold, and consequently the subsequent secondary cutting or grinding step is needed is avoided, and the purposes that when the valve seat is manufactured, the production steps are reduced, the valve seat can be put into use rapidly, and the production efficiency is improved are achieved. And the manufacturing efficiency of the flat double-gate valve is improved.

Description

Technical Field

[0001] The invention relates to the technical field of flat double gate valves, and in particular to a manufacturing device and a manufacturing method of a low-temperature flat double gate valve. Background Art

[0002] The structure of the low-temperature flat double gate valve is relatively complex, but the design is exquisite. It mainly includes key components such as valve body, valve seat, gate, valve stem, etc. Among them, the valve body and valve seat are usually made of low-temperature resistant materials to ensure that they can still maintain good strength and sealing performance in low-temperature environments. The gate is designed to be flat, and the valve is opened and closed by lifting the valve stem.

[0003] In the manufacturing process of the flat double gate valve, in order to improve the manufacturing efficiency, it is generally formed in one step by a mold, wherein the valve seat is the key sealing component of the low temperature flat double gate valve, and is usually made of wear-resistant and corrosion-resistant materials. A sealing surface is formed between the valve seat and the gate plate, and the sealing of the medium is achieved by pressing the gate plate.

[0004] In the prior art, after the molten liquid metal is poured into the mold, the cavity in the mold needs to be filled. However, at this time, the surface of the finished product is prone to contain certain bumps, so the bumps need to be removed by secondary cutting or grinding, which increases the manufacturing time and affects the processing efficiency. Summary of the invention

[0005] In view of the deficiencies in the prior art, the object of the present invention is to provide a manufacturing device and a manufacturing method for a low-temperature flat double gate valve, so as to solve the technical problems mentioned in the above background technology.

[0006] The above technical objectives of the present invention are achieved through the following technical solutions:

[0007] A manufacturing device for a low-temperature flat double gate valve comprises an upper mold and a lower mold, wherein an annular groove is provided in the middle of the top side of the upper mold, a pouring port is provided on the annular groove, a blocking member is provided on the top side of the upper mold, a cavity is provided on the top side of the lower mold, and a mold opening and closing member is provided above the upper mold;

[0008] The blocking member includes a central groove, the central groove is opened in the upper mold, the top side of the upper mold is connected to an electric telescopic rod, the output end of the electric telescopic rod extends into the central groove and is connected to a closing disk, the closing disk is dynamically sealed in the central groove, a placement groove is opened on the bottom side of the filling port, a blocking block is slidably connected in the placement groove, a gas rod is connected to a side of the blocking block close to the central groove, the end of the gas rod is inserted into the central groove, and the gas rod is slidably connected in the upper mold, and the gas rod is dynamically sealed in the upper mold;

[0009] A demoulding assembly for demoulding is also arranged in the blocking block, and a discharge piece is arranged on the side of the upper mold.

[0010] In a preferred example, the present invention can be further configured as follows: the demolding component includes a hollow groove, the hollow groove is opened in the blocking block, the top side wall of the hollow groove is connected to a spring 1, the bottom end of the spring 1 is connected to a sliding block, the bottom of the sliding block passes through the bottom side wall of the hollow groove and is aligned with the bottom side wall of the blocking block, and is a dynamic seal arrangement, the gas rod is tubular, the two ends of the gas rod are respectively connected to the hollow groove and the center groove, and an auxiliary part is arranged at one end of the gas rod close to the center groove.

[0011] In a preferred example, the present invention can be further configured as follows: the auxiliary component includes an expansion groove, the expansion groove is opened on the side of the gas rod close to the center groove, the inner wall of the expansion groove is connected to spring 2, the end of spring 2 away from the blocking rod is connected to a blocking piece, the blocking piece is slidably connected in the expansion groove, and is a dynamic seal arrangement.

[0012] In a preferred example, the present invention can be further configured as follows: the opening and closing parts include a plurality of columns, the columns are fixedly connected to the top side of the lower mold, the top ends of the columns pass through the upper mold and extend to the top of the upper mold, the columns are slidably connected to the upper mold, and the top ends of the columns are connected to a mold closing control part.

[0013] In a preferred example, the present invention can be further configured as follows: the mold closing control component includes a top plate, the bottom side of the top plate is connected to a plurality of the columns, the top of the top plate is connected to a hydraulic telescopic rod, the telescopic end of the hydraulic telescopic rod passes through the top plate and extends to the side of the electric telescopic rod, and the telescopic end of the hydraulic telescopic rod is connected to the upper mold.

[0014] In a preferred example, the present invention can be further configured as follows: the discharge member includes an inclined hole, the inclined hole is opened in the upper mold, the inclined hole is located above the blocking block, the inclined hole is inclined downward toward the outside of the upper mold, and the inclined hole is connected to the injection port.

[0015] In a preferred example, the present invention can be further configured as follows: a storage edge ring is connected to the outer bottom of the upper mold, and a storage groove is opened on the top side of the storage edge ring.

[0016] According to another aspect of the present invention, a method for manufacturing a low-temperature flat double gate valve is provided, and a manufacturing device for the low-temperature flat double gate valve is provided.

[0017] The manufacturing method of the low-temperature flat double gate valve comprises the following steps:

[0018] S101: The mold is installed on the column, and the hydraulic telescopic rod drives the upper mold and the lower mold to close;

[0019] S102: injecting molten metal into the annular groove, and the molten metal flows into the cavity on the top side of the lower mold from the position of the pouring port until the molten metal solution fills the blocking block;

[0020] S103: The electric telescopic rod retracts to drive the closure to rise, pulls the gas rod to retract into the center groove, and pulls the blocking block to fit the inner wall of the injection port to form a sealed state, and stops the electric telescopic rod;

[0021] S104: The blocking block squeezes out the excess molten metal so that it is discharged from the inclined hole, and the excess molten metal is transported to a designated position of a designated furnace, and the bottom side of the blocking block is in contact with the molten metal in the cavity;

[0022] S105: The molten metal is cooled and formed, and the electric telescopic rod is started again to retract, the blocking piece is separated from the expansion groove on the gas rod, the air in the hollow groove is extracted, and the sliding block is adsorbed into the hollow groove, and then the blocking block is adsorbed and fixed to the cooled valve seat;

[0023] S106: The hydraulic cylinder pulls the upper mold and the lower mold to open the mold, and the upper mold also pulls the formed valve seat out of the cavity of the lower mold;

[0024] S107: The electric telescopic rod is extended to drive the closing disk to increase the air pressure in the hollow groove and remove the valve seat. At the same time, the gas rod drives the blocking block to reset, the spring 1 drives the sliding block to reset, and the spring 2 drives the blocking piece to reset;

[0025] S108: Install the valve seat at the designated position of the flat double gate valve, and then install the subsequent parts to complete the manufacture of the flat double gate valve.

[0026] In summary, the present invention includes at least one of the following beneficial technical effects:

[0027] 1. The manufacturing device and manufacturing method of the low-temperature flat double gate valve avoid the appearance of additional bulges after the valve seat is formed in the mold, which leads to the need for secondary cutting or grinding in the subsequent process, thereby reducing the production steps when manufacturing the valve seat, allowing the valve seat to be quickly put into use, and improving the manufacturing efficiency of the flat double gate valve;

[0028] 2. The manufacturing device and manufacturing method of the low-temperature flat double gate valve, when demoulding, the electric telescopic rod is retracted for the second time, driving the closing disk to rise in the central groove, which will further reduce the air pressure in the central groove. As the air pressure in the central groove decreases again, the adsorption auxiliary part releases the blockage, and then the air rod is connected with the hollow groove inside the blocking block, and then the air in the hollow groove is adsorbed to reduce the air pressure in the hollow groove, and then the sliding block is adsorbed to move the sliding block into the hollow groove, so that the holes at the bottom of the blocking block generate adsorption force, and then the valve seat is adsorbed, so that the valve seat is adsorbed by the negative pressure in the hollow groove, and then the upper mold is driven to rise through the mold opening and closing parts, so that the valve seat in the groove is taken out, and the effect of rapid demoulding is achieved;

[0029] 3. The manufacturing device and manufacturing method of the low-temperature flat double gate valve, the expansion groove in the auxiliary part is used for sliding connection of the plugging piece and the connecting spring 2. During the demoulding process, the gas pressure in the central groove is small, and the plugging piece will be pulled first, and then the plugging piece will be straightened and separated from the expansion groove, so that the gas rod is connected with the central groove, so as to facilitate the subsequent adsorption of the valve seat;

[0030] 4. The manufacturing device and manufacturing method of the low-temperature flat double gate valve are provided with a plurality of columns connected to the top side of the lower mold, and the upper mold is slidably connected to the columns. Therefore, when closing and opening the mold, the upper mold slides on the columns, and when the upper mold slides down, it closes with the lower mold to close the mold, and the upper mold rises on the columns, so that the upper mold and the lower mold are opened, so as to facilitate the molding and manufacturing of the valve seat, and the mold closing control part is used to control the rise and fall of the upper mold;

[0031] 5. The manufacturing device and manufacturing method of the low-temperature flat double gate valve use a hydraulic telescopic rod to drive the upper mold to descend, so that the upper mold and the lower mold are merged to achieve the effect of mold closing, thereby facilitating the subsequent pouring of molten metal for valve seat molding, and directly drives the upper mold to rise during demolding, which can cooperate with the demolding component to achieve the demolding effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0033] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the manufacturing device and the manufacturing method of the low-temperature flat double gate valve of the present invention.

[0034] Figure 2 It is a schematic diagram of the internal structure of the upper mold of the manufacturing device and manufacturing method of the low-temperature flat double gate valve of the present invention.

[0035] Figure 3 The present invention is a schematic diagram of the internal structure of the upper mold and the lower mold of the manufacturing device and the manufacturing method of the low-temperature flat double gate valve.

[0036] Figure 4 It is a schematic diagram of the sealing block structure of the manufacturing device and manufacturing method of the low-temperature flat double gate valve of the present invention.

[0037] Figure 5 It is a schematic diagram of the internal structure of the sealing block and the gas rod of the manufacturing device and the manufacturing method of the low-temperature flat double gate valve of the present invention.

[0038] In the figure, 1. upper mold; 2. lower mold; 3. annular groove; 4. pouring port; 5. sealing part; 6. cavity; 7. mold opening and closing part; 8. center groove; 9. electric telescopic rod; 10. closing plate; 11. placement groove; 12. sealing block; 13. gas rod; 14. demoulding assembly; 15. discharge part; 16. hollow groove; 17. spring one; 18. sliding block; 19. auxiliary part; 20. expansion groove; 21. spring two; 22. sealing piece; 23. column; 24. mold closing control part; 25. top plate; 26. hydraulic telescopic rod; 27. inclined hole; 28. storage side ring; 29. ​​storage groove. DETAILED DESCRIPTION

[0039] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0040] Example:

[0041] Reference Figure 1-Figure 5 The manufacturing device of the low-temperature flat double gate valve disclosed in the present invention comprises an upper mold 1 and a lower mold 2, wherein an annular groove 3 is provided in the middle of the top side of the upper mold 1, a pouring port 4 is provided on the annular groove 3, a blocking member 5 is provided on the top side of the upper mold 1, a cavity 6 is provided on the top side of the lower mold 2, and a mold opening and closing member 7 is provided above the upper mold 1;

[0042] The blocking member 5 includes a central groove 8, which is provided in the upper mold 1. An electric telescopic rod 9 is connected to the top side of the upper mold 1. The output end of the electric telescopic rod 9 extends into the central groove 8 and is connected to a closing disk 10. The closing disk 10 is provided with a dynamic seal in the central groove 8. A placement groove 11 is provided on the bottom side of the filling port 4. A blocking block 12 is slidably connected in the placement groove 11. A gas rod 13 is connected to the side of the blocking block 12 close to the central groove 8. The end of the gas rod 13 is inserted into the central groove 8. The gas rod 13 is slidably connected in the upper mold 1. The gas rod 13 is provided with a dynamic seal in the upper mold 1.

[0043] A demoulding assembly 14 for demoulding is also provided in the blocking block 12 , and a discharge member 15 is provided on the side of the upper mold 1 .

[0044] In this embodiment, when in use, the upper mold 1 and the lower mold 2 are closed by the mold opening and closing member 7, and then the molten metal solution is poured into the annular groove 3, and the molten metal solution will enter the cavity 6 along the pouring port 4. As the liquid level in the cavity 6 increases, it will gradually fill up the blocking block 12. When the molten metal liquid fills up the metal block, the molten metal liquid that is higher than the discharge member 15 will be discharged along the discharge member 15;

[0045] The electric telescopic rod 9 is started, and the electric telescopic rod 9 drives the closing plate 10 to move upward, and then the air pressure in the central groove 8 decreases to form a negative pressure, so that the adsorption gas rod 13 is retracted into the central groove 8, and at the same time, the blocking block 12 is pulled to block the pouring port 4, and the excess molten metal liquid will be squeezed out, so that the excess molten metal liquid will be discharged along the discharge member 15;

[0046] A cooling mechanism may be provided in the lower mold 2, and the molten metal is mainly distributed in the lower mold 2, so as to facilitate cooling of the molten metal;

[0047] When the molten metal is cooled and a valve seat is formed, the electric telescopic rod 9 retracts again, further reducing the air pressure in the central groove 8, thereby driving the demoulding component 14 to adsorb the valve seat, and then driving the upper mold 1 to rise through the mold opening and closing part 7, so that the demoulding component 14 adsorbs the valve seat and separates it from the groove, and then the electric telescopic rod 9 extends, driving the closing plate 10 to descend and increasing the air pressure inside the central groove 8, so that the demoulding component 14 releases the adsorption of the valve seat, so that the valve seat can be removed, thereby achieving rapid manufacturing of the valve seat and avoiding the phenomenon of additional bumps, eliminating the subsequent cutting or grinding steps, and improving work efficiency.

[0048] In a further preferred embodiment of the present invention, Figure 2-5 As shown, the demolding assembly 14 includes a hollow groove 16, and the hollow groove 16 is opened in the blocking block 12. The top side wall of the hollow groove 16 is connected to a spring 17, and the bottom end of the spring 17 is connected to a sliding block 18. The bottom of the sliding block 18 passes through the bottom side wall of the hollow groove 16 and is aligned with the bottom side wall of the blocking block 12, and is a dynamic sealing arrangement. The gas rod 13 is tubular in arrangement, and the two ends of the gas rod 13 are respectively connected to the hollow groove 16 and the center groove 8, and an auxiliary part 19 is arranged at one end of the gas rod 13 close to the center groove 8.

[0049] In this embodiment, when demolding is carried out, the electric telescopic rod 9 contracts for the second time, driving the closing disk 10 to rise in the central groove 8, which will further reduce the air pressure in the central groove 8. As the air pressure in the central groove 8 decreases again, the adsorption auxiliary component 19 is unblocked, and then the gas rod 13 is connected with the hollow groove 16 inside the blocking block 12, and then the air in the hollow groove 16 is adsorbed to reduce the air pressure in the hollow groove 16, and then the sliding block 18 is adsorbed to move the sliding block 18 into the hollow groove 16, so that the holes at the bottom of the blocking block 12 generate adsorption force, and then the valve seat is adsorbed, so that the valve seat is adsorbed by the negative pressure in the hollow groove 16, and then the upper mold 1 is driven to rise through the mold opening and closing component 7, so that the valve seat in the mold groove is taken out, thereby achieving the effect of rapid demolding.

[0050] In a further preferred embodiment of the present invention, Figure 4-5 As shown, the auxiliary component 19 includes an expansion groove 20, and the expansion groove 20 is opened on the side of the gas rod 13 close to the central groove 8. The inner wall of the expansion groove 20 is connected to a spring 21, and the end of the spring 21 away from the blocking rod is connected to a blocking piece 22. The blocking piece 22 is slidably connected in the expansion groove 20 and is a dynamic seal arrangement.

[0051] In this embodiment, the expansion groove 20 in the auxiliary part 19 is used to slidably connect the blocking piece 22 and the connecting spring 21. During the demoulding process, the gas pressure in the central groove 8 is small, and the blocking piece 22 will be pulled first, and then the blocking piece 22 will be straightened and separated from the expansion groove 20, so that the gas rod 13 is connected with the central groove 8, so as to facilitate the subsequent adsorption of the valve seat.

[0052] When the electric telescopic rod 9 is retracted for the first time, because the gas rod 13 is slidably connected in the upper mold 1, the sealing piece 22 is pulled by the spring 21 in the expansion groove 20, so it will preferentially pull the sliding of the gas rod 13. After the gas rod 13 pulls the sealing block 12 to seal the filling port 4, the gas rod 13 is limited by the sealing block 12. Therefore, when the electric telescopic rod 9 drives the closing disk 10 to rise again, the gas rod 13 is limited by the sealing block 12 and will absorb the sealing piece 22 in the expansion groove 20; therefore, the sliding resistance of the gas rod 13 in the upper mold is less than the force of the spring 21 pulling the sealing piece 22; this achieves the effect of avoiding the sliding block 18 in the sealing block 12 from being adsorbed and moved upward in advance, causing the molten metal to enter the sealing block 12 and cause blockage and waste of resources.

[0053] In a further preferred embodiment of the present invention, Figure 1-2As shown, the opening and closing parts include a plurality of columns 23, and the columns 23 are fixedly connected to the top side of the lower mold 2. The top ends of the columns 23 pass through the upper mold 1 and extend to the top of the upper mold 1. The columns 23 are slidably connected to the upper mold 1, and the top ends of the columns 23 are connected to a mold closing control part 24.

[0054] In this embodiment, a plurality of columns 23 are connected to the top side of the lower mold 2, and the upper mold 1 is slidably connected to the columns 23. Therefore, when closing and opening the mold, the upper mold 1 slides on the columns 23, and the upper mold 1 slides down to close with the lower mold 2 for closing the mold. The upper mold 1 rises on the columns 23, so that the upper mold 1 and the lower mold 2 are opened to facilitate the molding and manufacturing of the valve seat. The mold closing control part 24 is used to control the rise and fall of the upper mold 1.

[0055] In a further preferred embodiment of the present invention, Figure 1-2 As shown, the mold closing control component 24 includes a top plate 25, the bottom side of the top plate 25 is connected to the plurality of columns 23, the top of the top plate 25 is connected to a hydraulic telescopic rod 26, the telescopic end of the hydraulic telescopic rod 26 passes through the top plate 25 and extends to the side of the electric telescopic rod 9, and the telescopic end of the hydraulic telescopic rod 26 is connected to the upper mold 1.

[0056] In this embodiment, the hydraulic telescopic rod 26 is used to drive the upper mold 1 to descend, so that the upper mold 1 and the lower mold 2 are merged to achieve the effect of mold closing, thereby facilitating the subsequent pouring of molten metal for valve seat molding. When demolding, the upper mold 1 is directly driven to rise, which can cooperate with the demolding component 14 to achieve the demolding effect.

[0057] In a further preferred embodiment of the present invention, Figure 1-3 As shown, the discharge member 15 includes an inclined hole 27 , which is opened in the upper mold 1 , located above the blocking block 12 , inclined downward toward the outside of the upper mold 1 , and connected to the pouring port 4 .

[0058] In this embodiment, the inclined hole 27 is provided. When the molten metal level in the filling port 4 is too high, the sealing block 12 is closed in the filling port 4. At the same time, the excess molten metal will be squeezed to the top of the sealing block 12. The inclined hole 27 is just located on the top side of the sealing block 12. Therefore, the excess molten metal will flow out of the upper mold 1 along the inclined hole 27, thereby avoiding the blocking of the filling port 4 caused by cooling in the upper mold 1. At the same time, after the sealing block 12 is closed, it is aligned with the bottom of the upper mold 1, thereby avoiding the appearance of excess protrusions after the valve seat is manufactured, thereby requiring secondary processing, affecting the manufacturing efficiency of the flat double gate valve.

[0059] In a further preferred embodiment of the present invention, Figure 1 As shown, a receiving edge ring 28 is connected to the outer bottom of the upper mold 1 , and a receiving groove 29 is formed on the top side of the receiving edge ring 28 .

[0060] In this embodiment, the receiving edge ring 28 is connected to the outer peripheral side of the upper mold 1, so that the molten metal flowing out of the inclined hole 27 can flow into the receiving groove 29, so that the excess molten metal can be reused to avoid wasting resources.

[0061] Embodiment 2:

[0062] According to another aspect of the present invention, a method for manufacturing a low-temperature flat double gate valve is provided.

[0063] The manufacturing method of the low-temperature flat double gate valve comprises the following steps:

[0064] S101: The mold is installed on the column 23, and the hydraulic telescopic rod 26 drives the upper mold 1 and the lower mold 2 to close;

[0065] S102: injecting molten metal into the annular groove 3, and the molten metal flows from the pouring port 4 into the cavity 6 on the top side of the lower mold 2 until the molten metal solution fills the blocking block 12;

[0066] S103: The electric telescopic rod 9 retracts to drive the closure to rise, pulls the gas rod 13 into the center groove 8, and pulls the blocking block 12 to fit the inner wall of the injection port 4 to form a sealed state, and stops the electric telescopic rod 9;

[0067] S104: The blocking block 12 squeezes the excess molten metal to discharge it from the inclined hole 27, and transports the excess molten metal to a designated position of a designated furnace, and the bottom side of the blocking block 12 is in contact with the molten metal in the cavity 6;

[0068] S105: The molten metal is cooled and formed, and the electric telescopic rod 9 is retracted again, the blocking piece 22 is separated from the expansion groove 20 on the gas rod 13, the air in the hollow groove 16 is extracted, and the sliding block 18 is adsorbed into the hollow groove 16, and then the blocking block 12 is adsorbed and fixed to the cooled valve seat;

[0069] S106: The hydraulic cylinder pulls the upper mold 1 and the lower mold 2 to open the mold, and the upper mold 1 also pulls the formed valve seat out of the cavity 6 of the lower mold 2;

[0070] S107: The electric telescopic rod 9 is extended to drive the closing disk 10 to increase the air pressure in the hollow groove 16 and remove the valve seat. At the same time, the gas rod 13 drives the blocking block 12 to reset, the spring 17 drives the sliding block 18 to reset, and the spring 21 drives the blocking piece 22 to reset;

[0071] S108: Install the valve seat at the designated position of the flat double gate valve, and then install the subsequent parts to complete the manufacture of the flat double gate valve.

[0072] In this embodiment, the method can improve the production efficiency of the valve seat when manufacturing the flat double gate valve, avoid reducing the valve seat manufacturing steps, and thus enable the valve seat to be quickly installed in the flat double gate valve, thereby improving the manufacturing efficiency of the flat double gate valve.

[0073] The embodiments of this specific implementation method are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A manufacturing device for a low-temperature flat double gate valve, comprising an upper mold (1) and a lower mold (2), characterized in that: An annular groove (3) is provided in the middle of the top side of the upper mold (1), a pouring port (4) is provided on the annular groove (3), a blocking member (5) is provided on the top side of the upper mold (1), a cavity (6) is provided on the top side of the lower mold (2), and a mold opening and closing member (7) is provided above the upper mold (1); The sealing member (5) comprises a central groove (8), wherein the central groove (8) is provided in the upper mould (1), and an electric telescopic rod (9) is connected to the top side of the upper mould (1), and the output end of the electric telescopic rod (9) extends into the central groove (8) and is connected to a closing plate (10), and the closing plate (10) is provided in the central groove (8) as a dynamic seal, and a placement groove (11) is provided on the bottom side of the filling port (4), and a sealing block (12) is slidably connected in the placement groove (11), and a gas rod (13) is connected to a side of the sealing block (12) close to the central groove (8), and an end of the gas rod (13) is inserted into the central groove (8), and the gas rod (13) is slidably connected in the upper mould (1), and the gas rod (13) is provided in the upper mould (1) as a dynamic seal; A demoulding component (14) for demoulding is also provided in the blocking block (12), and a discharge member (15) is provided on the side of the upper mold (1).

2. The manufacturing device of the low temperature flat double gate valve according to claim 1 is characterized in that: The demoulding assembly (14) includes a hollow groove (16), wherein the hollow groove (16) is opened in the blocking block (12), and a spring (17) is connected to the top side wall of the hollow groove (16), and a sliding block (18) is connected to the bottom end of the spring (17), and the bottom of the sliding block (18) passes through the bottom side wall of the hollow groove (16) and is aligned with the bottom side wall of the blocking block (12), and is a dynamic sealing arrangement, and the gas rod (13) is tubularly arranged, and the two ends of the gas rod (13) are respectively connected to the hollow groove (16) and the central groove (8), and an auxiliary part (19) is arranged at one end of the gas rod (13) close to the central groove (8).

3. The manufacturing device of the low temperature flat double gate valve according to claim 2 is characterized in that: The auxiliary component (19) includes an expansion groove (20), and the expansion groove (20) is opened on a side of the gas rod (13) close to the central groove (8). The inner wall of the expansion groove (20) is connected to a spring 2 (21), and the end of the spring 2 (21) away from the blocking rod is connected to a blocking piece (22). The blocking piece (22) is slidably connected in the expansion groove (20) and is a dynamic sealing arrangement.

4. The manufacturing device of the low temperature flat double gate valve according to claim 1, characterized in that: The opening and closing member comprises a plurality of columns (23), wherein the columns (23) are fixedly connected to the top side of the lower mold (2), the top ends of the columns (23) pass through the upper mold (1) and extend to the top of the upper mold (1), the columns (23) are slidably connected to the upper mold (1), and the top ends of the columns (23) are connected to a mold closing control member (24).

5. The manufacturing device of the low temperature flat double gate valve according to claim 4, characterized in that: The mold closing control component (24) includes a top plate (25), the bottom side of the top plate (25) is connected to a plurality of the uprights (23), the top of the top plate (25) is connected to a hydraulic telescopic rod (26), the telescopic end of the hydraulic telescopic rod (26) passes through the top plate (25) and extends to the side of the electric telescopic rod (9), and the telescopic end of the hydraulic telescopic rod (26) is connected to the upper mold (1).

6. The manufacturing device of the low temperature flat double gate valve according to claim 1, characterized in that: The discharge member (15) includes an inclined hole (27), the inclined hole (27) is opened in the upper mold (1), the inclined hole (27) is located above the blocking block (12), the inclined hole (27) is inclined downward toward the outer side of the upper mold (1), and the inclined hole (27) is connected to the pouring port (4).

7. The manufacturing device of the low temperature flat double gate valve according to claim 6, characterized in that: The outer bottom of the upper mold (1) is connected to a receiving edge ring (28), and the top side of the receiving edge ring (28) is provided with a receiving groove (29).

8. A method for manufacturing a low temperature flat double gate valve, characterized in that: A manufacturing device for any low-temperature flat double gate valve according to any one of claims 1 to 7, comprising the following steps: S101: The mold is mounted on the column (23), and the hydraulic telescopic rod (26) drives the upper mold (1) and the lower mold (2) to close; S102: injecting molten metal into the annular groove (3), and the molten metal flows from the position of the pouring port (4) into the cavity (6) on the top side of the lower mold (2) until the molten metal solution fills the blocking block (12); S103: the electric telescopic rod (9) retracts to drive the closure to rise, pulls the gas rod (13) to retract into the center groove (8), and pulls the blocking block (12) to fit the inner wall of the injection port (4) to form a sealed state, and stops the electric telescopic rod (9); S104: The blocking block (12) squeezes the excess molten metal to discharge it from the inclined hole (27), and transports the excess molten metal to a designated position in a designated furnace, and the bottom side of the blocking block (12) is in contact with the molten metal in the cavity (6); S105: The molten metal is cooled and formed, and the electric telescopic rod (9) is started again to retract, the blocking piece (22) is separated from the expansion groove (20) on the gas rod (13), the air in the hollow groove (16) is extracted, and the sliding block (18) is adsorbed into the hollow groove (16), and then the blocking block (12) is adsorbed and fixed to the cooled valve seat; S106: The hydraulic cylinder pulls the upper mold (1) and the lower mold (2) to open the mold, and the upper mold (1) also pulls the molded valve seat out of the cavity (6) of the lower mold (2); S107: The electric telescopic rod (9) is extended to drive the closing disk (10) to increase the air pressure in the hollow groove (16) and remove the valve seat. At the same time, the gas rod (13) drives the blocking block (12) to reset, the spring 1 (17) drives the sliding block (18) to reset, and the spring 2 (21) drives the blocking plate (22) to reset; S108: Install the valve seat at the designated position of the flat double gate valve, and then install the subsequent parts to complete the manufacture of the flat double gate valve.

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