Sealing valve for connecting port of powder forming equipment

Abstract

The utility model discloses a sealing valve used at the connecting port of powder forming equipment, which comprises a valve body, a valve plate and a rotating shaft, the rotating shaft is rotatably connected with the valve body, the valve plate is connected in the valve body through the rotating shaft, a sleeve is arranged outside the valve body, one end of the rotating shaft is sleeved in the sleeve, a large sealing ring is sleeved outside the rotating shaft, an air inlet hole is arranged on the sleeve, and the air inlet hole is communicated with the air inlet hole. An annular vent groove is formed in the inner wall of the sleeve and communicated with the air inlet, the large sealing ring is located in the annular vent groove, a gap is formed between the outer circumferential face of the large sealing ring and the inner circumferential face of the annular vent groove, an air supply channel communicated with the air inlet is arranged outside the sleeve, and the air inlet end of the air supply channel is communicated with an air source. Inert gas is filled into the gas source and then enters the annular vent groove through the gas supply channel, the filling amount of the gas can be controlled in the process, it is guaranteed that the inert gas in the gas filling space is filled sufficiently, and therefore external air is prevented from entering the gas filling space, and impurities which are oxidized and combusted are eradicated.

Description

TECHNICAL FIELD

[0001] The utility model relates to a neodymium iron boron powder preparation technical field, concretely relates to a sealing valve for powder forming equipment connecting mouth. BACKGROUND

[0002] Neodymium iron boron magnet is a kind of rare earth permanent magnet material composed of neodymium, iron and boron etc., with very high magnetic energy product and good magnetic performance, so it is widely used in electric vehicles, motor, wind power generation, consumer electronics and other fields.The production process of neodymium iron boron magnet involves multiple complex steps, including powder synthesis, sintering, heat treatment, processing forming, etc.

[0003] Especially in the powder forming process, how to ensure the quality and stability of materials is crucial.Due to the characteristics of easy oxidation and flammability of neodymium iron boron powder, air must be avoided during production to prevent oxidation and impurities.In this process, the connecting valve is often used at the connecting part of the forming equipment, which controls the gas flow through an effective sealing system, ensures the filling of inert gas and prevents the penetration of external air, so as to ensure the purity and stability of powder during the forming process.

[0004] CN213512151U discloses a sealing butterfly valve applied to the connecting port of neodymium iron boron powder forming equipment, which passes inert gas into the gas-filled space between the first circular sealing ring and the second circular sealing ring through the through hole on the valve body, so that external air cannot enter the valve body, and the impurities caused by oxidation and combustion are eliminated, thereby improving the quality of powder forming.However, after the inert gas is filled, part of the gas may naturally diffuse out of the first groove and the second groove at a very small flow rate, and when the inert gas is consumed, it needs to be continuously supplemented, resulting in gas waste and frequent replenishment.

[0005] In view of this, the present patent application is proposed. UTILITY MODEL CONTENT

[0006] The utility model aims at providing a sealing valve for powder forming equipment connecting port to solve the above technical problems.

[0007] The utility model realizes the following technical scheme:

[0008] The utility model discloses a sealing valve for powder forming equipment connecting mouth place, including valve body, valve plate and pivot, the pivot rotation is connected in the valve body, the valve plate is connected in the valve body through the pivot, the outside of valve body is equipped with the sleeve, one end of the pivot is covered in the sleeve, the outside of pivot is equipped with big sealing ring, the sleeve is equipped with the air inlet hole, the inner wall of sleeve is equipped with annular vent groove, the annular vent groove is linked together with the air inlet hole, big sealing ring is located in the annular vent groove, and there is the gap between the outer periphery of big sealing ring and the inner periphery of annular vent groove, be equipped with the gas supply channel that communicates with the air inlet hole in the outside of sleeve, the gas supply channel's gas inlet end communicates gas source.

[0009] As a preferred design, the gas source is a gas collection box that is sleeved outside the sleeve, the gas collection box is provided with a gas filling valve port that communicates therewith, and the gas supply channel communicates with the gas collection box.

[0010] As a preferred design, one end of the gas supply channel connected with the air inlet hole is provided with a gas supply interface, a one-way valve is arranged in the gas supply interface, a gas pump is arranged outside the gas collection box, and an outlet of the gas pump communicates with the gas supply channel.

[0011] As a preferred design, the air inlet holes are uniformly arranged along the circumferential side of the sleeve.

[0012] As a preferred design, the outer part of the pivot is further sleeved with a small sealing ring, and the inner wall of the sleeve is provided with an annular groove, and the small sealing ring is sleeved in the annular groove.

[0013] As a preferred design, two small sealing rings are arranged, respectively located on both sides of the big sealing ring.

[0014] As a preferred design, the end of the pivot penetrates the sleeve, a gas collection ring groove is arranged on the pivot, a plurality of gas return channels are arranged on the pivot along the axial direction thereof, one end of the gas return channel penetrates the side wall of the pivot and communicates with the gas collection ring groove, the other end of the gas return channel is connected with a gas return pipe, and each gas return pipe communicates with the gas collection box.

[0015] As a preferred design, two gas collection ring grooves are symmetrically arranged along the big sealing ring, and each gas collection ring groove is located between the big sealing ring and the corresponding small sealing ring.

[0016] As a preferred design, the gas return channels are uniformly arranged along the circumferential surface of the pivot.

[0017] The radial section of each return gas passage on one of the gas collecting ring grooves along the rotation shaft is parallel to the radial section of the corresponding return gas passage on the other gas collecting ring groove along the rotation shaft, and the axial section of each return gas passage on one of the gas collecting ring grooves along the rotation shaft overlaps the axial section of the corresponding return gas passage on the other gas collecting ring groove along the rotation shaft.

[0018] As a preferred design, the valve body comprises two connecting valves connected together through a connecting strip, the sleeve is fixed on one side of the connecting valve, two rotating grooves are arranged on the inner side wall of the connecting valve, and two rotating shafts are arranged on the two sides of the valve plate and respectively matched with the rotating grooves; one rotating shaft is sleeved in the sleeve and penetrates out of the sleeve, and a pushing rod is arranged on one end of the rotating shaft outside the sleeve.

[0019] Compared with the prior art, the utility model has the advantages and beneficial effects that:

[0020] The sealing valve for the connecting port of the powder forming equipment provided in the utility model embodiment fills the inert gas into the gas source, and then further enters the annular air passage through the gas supply channel, the filling amount of the gas can be controlled in this process, the inert gas in the inflation space is ensured to be sufficient, so that the outside air is prevented from entering and the impurities of oxidation combustion are eliminated. This design can more stably provide continuous gas supply, improve the stability of the production process, and avoid the situation that the inert gas needs to be continuously and frequently supplemented when the gas is consumed in the prior art. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical scheme of the exemplary embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the embodiments, and it should be understood that the following drawings only show some embodiments of the utility model, and therefore should not be regarded as a limitation to the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor. In the drawings:

[0022] Figure 1 It is the overall structure schematic view of the sealing valve for the connecting port of the powder forming equipment.

[0023] Figure 2 It is the structure schematic view of the sleeve inside and the sleeve and the rotating shaft matched structure.

[0024] Figure 3 It is the structure schematic view of the valve plate.

[0025] Figure 4 It is the structure schematic view of the inflation and return gas system.

[0026] Markings in the drawings and corresponding component names:

[0027] 1-valve body, 11-connection valve, 12-sleeve, 121-inlet hole, 122-annular vent groove, 2-connection strip, 3-rotation groove, 4-rotation shaft, 5-valve plate, 6-large sealing ring, 7-small sealing ring, 8-gas return channel, 9-gas collection ring groove, 13-gas collection box, 14-gas pump, 15-gas supply channel, 16-gas supply interface, 17-gas return pipe, 18-gas return interface, 19-inflation valve, 20-pushing rod. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical scheme and advantages of the utility model clearer and more apparent, the utility model will be further described in detail below in combination with embodiments and drawings. The illustrative embodiments of the utility model and their descriptions are only used to explain the utility model and not as a limitation on the utility model.

[0029] In the following description, a large number of specific details are set forth in order to provide a thorough understanding of the utility model. However, it will be apparent to one of ordinary skill in the art that the utility model can be practiced without these specific details. In other instances, well-known structures, circuits, materials or processes have not been described in detail in order to avoid obscuring the utility model.

[0030] In the entire description, the mention of "one embodiment", "an embodiment", "one example" or "an example" means that the specific features, structures or characteristics described in connection with the embodiment or example are included in at least one embodiment of the utility model. Therefore, the phrases "one embodiment", "an embodiment", "one example" or "an example" appearing in various places throughout the description are not necessarily all referring to the same embodiment or example. In addition, specific features, structures or characteristics can be combined in one or more embodiments or examples in any appropriate combination and / or sub-combination. In addition, those of ordinary skill in the art should understand that the drawings provided herein are for illustrative purposes only and are not necessarily drawn to scale. The term "and / or" used herein includes any and all combinations of one or more of the relevant listed items.

[0031] In the description of the utility model, the orientation or positional relationship indicated by the terms "front", "back", "left", "right", "up", "down", "vertical", "horizontal", "high", "low", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the scope of protection of the utility model.

[0032] Embodiment 1:

[0033] As Figure 1 , 2As shown in Figures 3 and 4, a sealing valve for use at the connection port of a powder forming device comprises a valve body 1, a valve plate 5, and a rotating shaft 4. The valve body 1 includes two connecting valves 11, each having an inner ring. The two connecting valves 11 are spliced ​​together and bolted together via an external connecting strip 2. A sleeve 12 is fixed to one side of the two connecting valves 11 and is located at the splice of the two connecting valves 11. The sleeve 12 can be formed by butting two semi-cylindrical bodies together, and each semi-cylindrical body and a connecting valve 11 can be integrally formed. The axes of the valve body 1 and the sleeve 12 are coaxial and perpendicular to each other. A rotating groove 3 is provided on the inner wall of the ring of the valve body 1, coaxial with the sleeve 12. Two rotating grooves 3 are provided and arranged opposite each other. Rotating shafts 4 are provided at both ends of the valve plate 5. The valve plate 5 is coaxial with the valve body 1, and each rotating shaft 4 rotates coaxially with a rotating groove 3. Each rotating shaft 4 can be inserted into and rotates within the rotating groove 3. One of the rotating shafts 4 is longer and is sleeved inside the sleeve 12 and passes through the sleeve 12 to the outside. A toggle rod 20 is provided on one end of the rotating shaft 4 located outside the sleeve 12. Rotating the toggle rod 20 can drive the rotating shaft 4 to rotate, thereby driving the valve plate 5 to rotate in the valve body 1.

[0034] A large sealing ring 6 is sleeved on the outside of the rotating shaft 4 for sealing. Multiple air inlet holes 121 are provided on the sleeve 12, evenly spaced along the circumference of the sleeve 12. Annular vent grooves 122 are provided on the inner wall of the sleeve 12, communicating with each of the air inlet holes 121. Gas can enter the annular vent grooves 122 through the air inlet holes 121. The large sealing ring 6 is located within the annular vent grooves 122, with a gap between the outer circumference of the large sealing ring 6 and the inner circumference of the annular vent grooves 122. An air supply channel 15 is provided on the outside of the sleeve 12, communicating with the air inlet holes 121. The air inlet end of the air supply channel 15 is connected to a gas source, allowing gas from the gas source to enter the air inlet holes 121 through the air supply channel 15.

[0035] During use, the inert gas is first filled into the gas source, enters the air inlet 121 through the air supply channel 15, and enters the annular ventilation groove 122 through the air inlet 121, so that the inert gas fills the inflation space between the annular ventilation groove 122 and the large sealing ring 6, thereby preventing outside air from entering the valve body 1, eliminating impurities caused by oxidation and combustion, and thus improving the quality of powder molding.

[0036] In this embodiment, inert gas is introduced into the gas source and then further into the annular vent groove 122 through the gas delivery channel 15. This process controls the amount of gas introduced, ensuring that the plenum space is adequately filled with inert gas, thereby preventing the ingress of outside air and preventing impurities from oxidizing and burning. This design provides a more stable and continuous gas supply, improving the stability of the production process.

[0037] Furthermore, the gas source is a gas collection box 13, which is mounted outside the casing 12. This box 13 is an annular box with an annular cavity inside that contains inert gas. A charging valve 19 is provided in the box 13, through which a certain amount of inert gas is introduced. A gas supply channel 15 is also connected to the box 13.

[0038] Preferably, a gas supply port 16 is provided at the end of the gas supply channel 15 that connects to the gas inlet 121. A one-way valve is provided within the gas supply port 16. Multiple air pumps 14 are provided outside the gas collection box 13, with the pump outlet of each air pump 14 connected to the gas supply channel 15. In this embodiment, the gas supply channel 15 can be made of a flexible material. The air pumps 14, gas supply channel 15, gas supply port 16, and inflation valve port 19 form an inflation system.

[0039] During use, a sufficient amount of inert gas is pumped into the gas collection box 13 through the inflation valve port 19. The inflation valve port 19 is then closed and the air pump 14 is activated. The inert gas is then delivered to the flexible air delivery channel 15 through the air delivery interface 16. By delivering inert gas through the air pump 14, the amount of gas charged can be more accurately controlled, ensuring that the inflatable space is adequately filled with inert gas. Furthermore, the ability to precisely control the flow rate and volume of the inert gas through the air pump 14 makes the inflation process more controllable, further ensuring that the gas supply during the production process is always in an optimal state, and avoiding the problem of excessive or insufficient gas supply.

[0040] Example 2:

[0041] In addition to Example 1, a small sealing ring 7 is further sleeved around the exterior of the rotating shaft 4. The inner wall of the sleeve 12 is provided with an annular groove, within which the small sealing ring 7 is sleeved. Two small sealing rings 7 are provided, one on either side of the large sealing ring 6. By adding additional small sealing rings 7 on either side of the large sealing ring 6, the inert gas can be more securely enclosed within the system, reducing the risk of gas leakage and thereby improving the sealing effect.

[0042] Example 3:

[0043] Based on Example 2, further, a sleeve 12 is provided through the end of the rotating shaft 4, and an air collecting groove 9 is provided on the outer wall of the rotating shaft 4. The air collecting groove 9 is an inner groove and is provided along the outer circumference of the rotating shaft 4. The air collecting grooves 9 are evenly arranged along the circumference of the rotating shaft 4. Two air collecting grooves 9 are symmetrically provided along the large sealing ring 6, and each air collecting groove 9 is located between the large sealing ring 6 and the corresponding small sealing ring 7. Multiple return air channels 8 are provided along the axial direction of the rotating shaft 4. One end of each return air channel 8 extends radially along the rotating shaft 4 and passes through the rotating shaft 4 to connect with two air collecting ring grooves 9. The other end of each return air channel 8 extends along the axis of the rotating shaft 4 to the end face of the rotating shaft 4. Therefore, the return air channels 8 are generally F-shaped. The radial portion of each return air channel 8 on one air collecting ring groove 9 along the rotating shaft 4 is parallel to the radial portion of the corresponding return air channel 8 on the other air collecting ring groove 9, while the axial portion of each return air channel 8 along the rotating shaft 4 overlaps with the axial portion of the corresponding return air channel 8 on the other air collecting ring groove 9, sharing a common axial distribution section. A return air pipe 17 is connected to the end face of the rotating shaft 4. Each return air pipe 17 is connected to the gas collection box 13. Each return air pipe 17 is connected to the return air channel 8 and the gas collection box 13 via a return air interface 18. Each return air interface 18 is provided with a one-way valve. The return air pipe 17 is preferably made of a flexible material to ensure that the valve plate 5 can rotate normally. The gas collecting ring groove 9, the gas return channel 8, and the gas return pipe 17 form a gas return system.

[0044] In this embodiment, the design of the gas collecting annular groove 9 and the gas return channel 8 allows for more effective control of the gas flow path, ensuring uniform gas distribution during the inflation process, avoiding gas waste or localized gas shortages, and further improving the efficiency and consistency of the inflation process. Furthermore, the gas collecting annular groove 9 and the gas return channel 8 can be utilized to recover and re-store the gas in the gas collection box 13 after use. This design not only helps reduce inert gas consumption and production costs, but also effectively reduces waste gas emissions, complying with environmental protection requirements.

[0045] When the inert gas slowly overflows, the gas flow path is guided to the small sealing ring 7 and the return gas channel 8 through the gap between the sleeve 12 and the rotating shaft 4, and then returns to the gas collection box 13 from the gas collecting ring groove 9, thereby effectively preventing the inert gas from overflowing from the outside and further improving the safety of the system and the gas utilization efficiency.

[0046] The utility model improves the design of the inflation and return air systems, making the gas supply to each molding device more stable and uniform, thereby improving the consistency and stability of the blanks during the powder molding process, reducing performance differences caused by uneven gas supply, and thus helping to improve the quality of the final product.

[0047] The above detailed description of the specific embodiments of the present application has been made for the purpose of illustrating the purpose, technical solutions and beneficial effects of the present application, and it should be understood that the above is only a specific embodiment of the present application and is not used to limit the protection scope of the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A sealing valve for the connection port of a powder forming equipment, characterized in that: The invention comprises a valve body (1), a valve plate (5) and a rotating shaft (4), wherein the rotating shaft (4) is rotatably connected to the valve body (1), the valve plate (5) is connected to the inside of the valve body (1) through the rotating shaft (4), a sleeve (12) is provided on the outside of the valve body (1), one end of the rotating shaft (4) is sleeved in the sleeve (12), a large sealing ring (6) is sleeved on the outside of the rotating shaft (4), an air inlet hole (121) is opened on the sleeve (12), and the sleeve (12) An annular ventilation groove (122) is provided on the inner wall thereof, the annular ventilation groove (122) is connected to the air inlet (121), the large sealing ring (6) is located in the annular ventilation groove (122), and a gap is provided between the outer peripheral surface of the large sealing ring (6) and the inner peripheral surface of the annular ventilation groove (122), an air supply channel (15) connected to the air inlet (121) is provided on the outside of the sleeve (12), and the air inlet end of the air supply channel (15) is connected to a gas source.

2. A sealing valve for a connection port of a powder forming device according to claim 1, characterized in that: The gas source is a gas collection box (13) sleeved outside the sleeve (12), and the gas collection box (13) is provided with a gas charging valve port (19) connected thereto, and the gas supply channel (15) is in communication with the gas collection box (13).

3. A sealing valve for a connection port of a powder forming device according to claim 2, characterized in that: An air supply interface (16) is provided at one end of the air supply channel (15) connected to the air inlet (121), a one-way valve is provided inside the air supply interface (16), an air pump (14) is provided outside the gas collection box (13), and an outlet of the air pump (14) is connected to the air supply channel (15).

4. A sealing valve for a connection port of a powder forming device according to any one of claims 2 to 3, characterized in that: The air inlet holes (121) are evenly arranged along the circumference of the sleeve (12).

5. A sealing valve for a connection port of a powder forming device according to any one of claims 2 to 3, characterized in that: The outside of the rotating shaft (4) is also sleeved with a small sealing ring (7), the inner wall of the sleeve (12) is provided with an annular groove, and the small sealing ring (7) is sleeved in the annular groove.

6. The sealing valve for the connection port of powder forming equipment according to claim 5, characterized in that: Two small sealing rings (7) are provided, and are respectively located on both sides of the large sealing ring (6).

7. The sealing valve for the connection port of powder forming equipment according to claim 6, characterized in that: The end of the rotating shaft (4) passes through the sleeve (12), and a gas collecting annular groove (9) is provided on the rotating shaft (4). A plurality of return air channels (8) are provided on the rotating shaft (4) along its axial direction. One end of the return air channel (8) passes through the side wall of the rotating shaft (4) and is connected to the gas collecting annular groove (9). The other end of the return air channel (8) is connected to a return air pipe (17), and each of the return air pipes (17) is connected to a gas collection box (13).

8. The sealing valve for the connection port of powder forming equipment according to claim 7, characterized in that: Two gas collecting ring grooves (9) are symmetrically arranged along the large sealing ring (6), and each gas collecting ring groove (9) is located between the large sealing ring (6) and the corresponding small sealing ring (7).

9. A sealing valve for a connection port of a powder forming device according to claim 7 or 8, characterized in that: The return air channels (8) are evenly arranged along the circumference of the rotating shaft (4); The radial section of each return air channel (8) on one of the gas collecting annular grooves (9) along the rotating shaft is parallel to the radial section of each corresponding return air channel (8) on the other gas collecting annular groove (9) along the rotating shaft, and the axial section of each return air channel (8) on one of the gas collecting annular grooves (9) along the rotating shaft overlaps with the axial section of each corresponding return air channel (8) on the other gas collecting annular groove (9) along the rotating shaft.

10. The sealing valve for the connection port of powder forming equipment according to claim 1, characterized in that: The valve body (1) comprises two connecting valves (11), which are connected together by a connecting strip (2). The sleeve (12) is fixed on one side of the connecting valve (11). Two rotating grooves (3) are provided on the inner side wall of the connecting valve (11). Rotating shafts (4) are provided on both sides of the valve plate (5). Each rotating shaft (4) is respectively rotatably matched with a rotating groove (3). One of the rotating shafts (4) is sleeved inside the sleeve (12) and passes through the sleeve (12). A toggle rod (20) is provided on one end of the rotating shaft (4) located outside the sleeve (12).

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