Standard screen device for nickel-based alloy

Abstract

The utility model discloses a standard screen device for nickel-based alloy. The standard screen device comprises a pressing plate, a tightening assembly, an upper cover, an upper-layer screen, a lower-layer screen, a base plate, an upper plate, an ultrasonic device I and an ultrasonic device II. The upper cover, the upper-layer screen, the lower-layer screen and the base plate are circles which are matched with one another, are sequentially, coaxially and horizontally stacked together from top to bottom, and are coaxially placed on the horizontally arranged upper plate; a pressing plate is horizontally arranged on the upper surface of the upper cover, and the upper cover, the upper-layer screen, the lower-layer screen and the base plate are fixed to the upper plate through cooperation of the pressing plate and the binding assembly. An ultrasonic device I is arranged on one side of the outer circumferential surface of the upper-layer screen, and nickel-based alloy powder is subjected to primary screening through cooperation of the ultrasonic device I and the upper-layer screen; an ultrasonic device II is arranged on one side of the outer circumferential face of the lower-layer screen, and nickel base alloy powder is subjected to double screening through cooperation of the ultrasonic device II and the lower-layer screen. According to the utility model, the screening efficiency and the screening precision are improved.

Description

Technical Field

[0001] This utility model relates to the field of metal powder preparation technology, specifically to a standard sieve device for nickel-based alloys. Background Technology

[0002] Nickel-based alloys exhibit high strength and a certain degree of resistance to oxidation and corrosion at high temperatures of 650–1000℃, making them widely used in energy development, chemical industry, electronics, marine, and aerospace fields. Different applications have varying requirements for the particle size and shape of nickel-based alloys. For example, nickel-based alloy powders used in aerospace often require separate sieving and impurity removal after preparation to meet specific production process requirements.

[0003] Traditional screening devices commonly suffer from the following problems when screening nickel-based alloys: 1) Poor screening accuracy: To meet the technical requirements of screening, repeated screening is required on-site. Powder screening may require two, three, or even four screenings to meet the standards. However, multiple screenings increase powder loss, directly affecting production costs, and the screening efficiency is low; 2) During the screening of nickel-based alloy semi-finished products, large particles accumulate on the screen plate, easily causing screen blockage. Moreover, the vibrating screen needs to be stopped during the collection and cleaning of large particles on the screen plate, affecting work efficiency; 3) Existing screening devices generally use bolts and nuts for assembly, which leads to slow efficiency in replacing screens, disassembling, and reinstalling, affecting the screening progress; 4) Problems such as easy screen blockage, powder accumulation under gravity, and lack of impurity removal function exist, thereby reducing screening efficiency and screening quality.

[0004] Therefore, developing a high-efficiency, precise, and stable standard sieve device for screening nickel-based alloys has become an urgent problem to be solved. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a standard screening device for nickel-based alloys, which has a simple structure, reliable sealing, improves screening efficiency and screening accuracy, reduces the occurrence of screen hole clogging, and while meeting the screening requirements in the nickel-based alloy processing process, also reduces labor and maintenance costs.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: The innovation of this invention is as follows: a standard sieve device for nickel-based alloys includes a pressure plate, a binding assembly, an upper cover, an upper sieve, a lower sieve, a base, an upper plate, an ultrasonic device I, and an ultrasonic device II; the upper cover, upper sieve, lower sieve, and base are all mutually matching circles, and are stacked horizontally and coaxially from top to bottom, and are placed coaxially on the upper surface of the horizontally positioned upper plate via the base; a pressure plate is horizontally attached to the upper surface of the upper cover, and the upper cover, upper sieve, lower sieve, and base are fixed to the upper plate through the cooperation of the pressure plate and the binding assembly; an ultrasonic device I is also linked to one side of the outer circumference of the upper sieve, and the nickel-based alloy powder is firstly sieved through the cooperation of the ultrasonic device I and the upper sieve; an ultrasonic device II is also linked to one side of the outer circumference of the lower sieve, and the nickel-based alloy powder is secondarily sieved through the cooperation of the ultrasonic device II and the lower sieve.

[0007] Preferably, it also includes clamps and buckles; the upper and lower screens are both integrally formed from a hollow cylindrical sealing plate with open upper and lower ends and a screen set at the bottom, and the upper end of the upper screen matches the upper cover, and the lower end of the upper screen matches the upper end of the lower screen; at the joint between the upper cover and the upper screen, and at the joint between the upper screen and the lower screen, a matching clamp is coaxially sleeved, and at the locking point of each clamp, a matching buckle is also engaged, and the upper cover, the upper screen and the lower screen are coaxially connected together through the cooperation of the buckle and the corresponding clamp.

[0008] Preferably, the upper screen has a mesh size of 100 mesh, and the lower screen has a mesh size of 270 mesh.

[0009] Preferably, the chassis is a vertically arranged hollow cylindrical structure with an open upper end. The upper end of the chassis extends outward in a trumpet shape and then vertically upwards coaxially flanged, so that the inner diameter of the upper end of the chassis is larger than the inner diameter of the lower end. The outer diameter of the lower end of the lower screen matches the inner diameter of the upper end of the chassis and is larger than the inner diameter of the lower end of the chassis, so that the lower end of the lower screen is coaxially fitted into the upper end of the chassis.

[0010] Preferably, an anti-slip pad is provided coaxially and horizontally between the lower end of the chassis and the upper surface of the upper plate. The anti-slip pad is circular and matches the lower end of the chassis. The chassis is placed on the upper plate through the anti-slip pad, thereby preventing the chassis from slipping.

[0011] Preferably, the pressure plate is a cross shape with two long and two short sections, and both ends of its long sides extend horizontally outward beyond the coverage area of ​​the chassis. Vertically symmetrical positioning posts are also provided on the upper surfaces of both ends of its long sides extending beyond the chassis. The two positioning posts are spaced apart on the outer sides of the upper cover, upper screen, lower screen, and chassis. A sleeve matching each positioning post is vertically fixed on the upper surface of the upper plate relative to the position of each positioning post. The lower end of each positioning post extends vertically downward beyond the lower surfaces of both ends of the long side of the pressure plate and is coaxially inserted into the corresponding sleeve. A fastening pin is horizontally provided on one side of the outer circumference of each sleeve. The fastening end of each fastening pin extends radially along the corresponding sleeve into the interior of the corresponding sleeve and is abutted and fixed against the corresponding positioning post, thereby positioning the pressure plate through the positioning posts.

[0012] Preferably, the binding assembly includes a binding strap, a positioning ring, and a tension buckle; symmetrical U-shaped limiting rods are also provided on the upper surface of both ends of the short side of the pressure plate, and the opening groove of each limiting rod is provided along the length of the short side of the pressure plate, and its two opening ends are fixed vertically downward at the corresponding positions on the upper surface of the pressure plate; the binding strap passes between the two limiting rods, and its two ends extend outward to the outside of the upper cover, and then extend vertically downward; symmetrical positioning rings are also provided vertically on the upper surface of the upper plate relative to the two ends of the binding strap and relative to the outside of the chassis, and the two ends of the binding strap are respectively fixedly connected to the corresponding positioning rings, and a tension buckle is provided on the binding strap on the side relative to the lower screen, thereby ensuring the binding strap is tight, and through the cooperation of the binding strap, positioning ring, and pressure plate, the upper cover, upper screen, lower screen, and chassis are fixed on the upper plate.

[0013] Preferably, the assembly further includes a lower plate, springs, a cylinder, and a fixing plate; the lower plate is a horizontally arranged annular ring, and its outer diameter is consistent with the outer diameter of the upper plate, and it is horizontally and coaxially spaced directly below the upper plate; several springs are also vertically and evenly distributed along the circumference of the lower plate and the upper plate near the outer edge of the lower plate, the lower end of each spring is fixedly connected to the corresponding position of the upper surface of the lower plate, and its upper end is fixedly connected to the corresponding position of the lower surface of the upper plate; a cylinder with open upper and lower surfaces is also vertically and coaxially arranged on the lower surface of the lower plate, the inner diameter of the cylinder is consistent with the inner diameter of the lower plate, and its upper end is coaxially and fixedly connected to the lower surface of the lower plate, the lower end of the cylinder is fixedly connected to the middle position of the upper surface of the horizontally arranged fixing plate, and the lower plate is fixed to the fixing plate through the cylinder.

[0014] Preferably, it also includes a rotating door and a handle; a matching rotating door is vertically embedded on one side of the outer circumference of the cylinder, and one vertical side of the rotating door is horizontally hinged to the cylinder, and a handle is vertically provided on the outer surface of the rotating door away from its hinge point, so that the rotating door can be opened and closed by the handle.

[0015] Preferably, it also includes a motor, a rotating shaft, a turntable, counterweights, and positioning pins; a circular turntable is horizontally coaxially arranged inside the cylinder relative to the rotating door position, and the diameter of the turntable is smaller than the inner diameter of the cylinder; a motor is vertically arranged at the middle of the lower surface of the upper plate, and the output end of the motor is vertically downward, and is coaxially linked with the turntable through a rotating shaft, thereby driving the turntable to rotate horizontally inside the cylinder; counterweights are symmetrically arranged horizontally on the upper surface of the turntable, and one end of each counterweight is rotatably connected to the rotating shaft. Furthermore, each of its other ends is arranged radially outward along the turntable, and a pin hole matching the positioning pin is vertically embedded and opened at the other end position on its upper surface; on the upper surface of the turntable, relative to the position of the pin hole as the counterweight rotates, several scale holes matching the positioning pin are arranged sequentially along the circumference of the turntable. After the two counterweights are horizontally rotated around the axis to adjust the angle between the two counterweights, the two counterweights are fixed on the turntable by the cooperation of the positioning pin, pin hole and corresponding scale hole, and then the center of gravity is adjusted to make the turntable unbalanced when it rotates.

[0016] The beneficial effects of this utility model are:

[0017] (1) This utility model has a simple structure and reliable sealing, which improves screening efficiency and screening accuracy, reduces the occurrence of screen hole blockage, and while meeting the screening requirements in the nickel-based alloy processing process, it also reduces labor costs and maintenance costs.

[0018] (2) This utility model can be quickly assembled and disassembled by using bandages, positioning rings, pressure plates, clamps and buckles together, thereby greatly improving work efficiency.

[0019] (3) The present invention adopts an adjustable angle design between two counterweights. By adjusting the center of gravity, the turntable will be unbalanced when it rotates, so that the nickel-based alloy powder will move clockwise or counterclockwise on the upper or lower screen according to the direction of rotation, thereby increasing the screening path of the nickel-based alloy powder and improving the screening accuracy. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of a standard sieve device for nickel-based alloys according to the present invention.

[0022] Figure 2 This is a schematic diagram from another perspective of the standard sieve device for nickel-based alloys according to this utility model.

[0023] Figure 3 This is an internal sectional view of the present invention.

[0024] Among them, 1-positioning column; 2-upper screen; 3-fastening pin; 4-clamp; 5-lower screen; 6-base; 7-positioning ring; 8-upper plate; 9-rotating door; 10-fixed plate; 11-handle; 12-spring; 13-lower plate; 14-bandage; 15-upper cover; 16-pressure plate; 17-buckle; 18-tensioning buckle; 19-motor; 20-counterweight; 21-turntable; 22-ultrasonic device II; 23-ultrasonic device I; 24-cylinder. Detailed Implementation

[0025] The technical solution of this utility model will be clearly and completely described below through specific embodiments.

[0026] This utility model discloses a standard sieve device for nickel-based alloys, comprising a pressure plate 16, a binding assembly, an upper cover 15, an upper sieve 2, a lower sieve 5, a base 6, an upper plate 8, an ultrasonic device I 23, and an ultrasonic device II 22; the specific structure is as follows. Figures 1-3 As shown, the upper cover 15, upper screen 2, lower screen 5, and base 6 are all matching circles, and are stacked horizontally and coaxially from top to bottom. The base 6 is placed coaxially on the upper surface of the horizontally set upper plate 8. A pressure plate 16 is horizontally attached to the upper surface of the upper cover 15, and the upper cover 15, upper screen 2, lower screen 5, and base 6 are fixed to the upper plate 8 through the cooperation of the pressure plate 16 and the binding assembly. An ultrasonic device I 23 is also linked to one side of the outer circumference of the upper screen 2, and the nickel-based alloy powder is screened in the first stage through the cooperation of the ultrasonic device I 23 and the upper screen 2. An ultrasonic device II 22 is also linked to one side of the outer circumference of the lower screen 5, and the nickel-based alloy powder is screened in the second stage through the cooperation of the ultrasonic device II 22 and the lower screen 5.

[0027] like Figures 1-3As shown, both the upper screen 2 and the lower screen 5 are integrally formed from a hollow cylindrical sealing plate with open upper and lower ends and a screen set at the bottom. The upper end of the upper screen 2 matches the upper cover 15, and the lower end of the upper screen 2 matches the upper end of the lower screen 5. At the joint between the upper cover 15 and the upper screen 2, and at the joint between the upper screen 2 and the lower screen 5, a matching clamp 4 is coaxially fitted. At the locking point of each clamp 4, a matching buckle 17 is also fitted. Through the cooperation of the buckle 17 and the corresponding clamp 4, the upper cover 15, the upper screen 2, and the lower screen 5 are coaxially connected together. The screen aperture of the upper screen 2 is 100 mesh, and the screen aperture of the lower screen 5 is 270 mesh.

[0028] like Figures 1-3 As shown, the chassis 6 is a vertically arranged hollow cylindrical structure with an open upper end. The upper end of the chassis 6 extends outward in a trumpet shape and then vertically upwards and coaxially flanges, so that the inner diameter of the upper end of the chassis 6 is larger than the inner diameter of the lower end. The outer diameter of the lower end of the lower screen 5 matches the inner diameter of the upper end of the chassis 6 and is larger than the inner diameter of the lower end of the chassis 6, so that the lower end of the lower screen 5 is coaxially fitted into the upper end of the chassis 6.

[0029] like Figures 1-3 As shown, an anti-slip pad is also provided horizontally and coaxially between the lower end of the chassis 6 and the upper surface of the upper plate 8. The anti-slip pad is circular and matches the lower end of the chassis 6. The chassis 6 is placed on the upper plate 8 through the anti-slip pad, thereby preventing the chassis 6 from slipping.

[0030] The pressure plate 16 of this utility model is a cross shape with two long and two short sections, and both ends of its long sides extend horizontally outward beyond the coverage area of ​​the base plate 6. Vertically symmetrical positioning posts 1 are also provided on the upper surface of both ends of its long sides extending beyond the base plate 6. Figures 1-3 As shown, two positioning posts 1 are spaced apart on the outer sides of the upper cover 15, the upper screen 2, the lower screen 5, and the chassis 6. A sleeve matching the positioning post 1 is also vertically fixed on the upper surface of the upper plate 8 relative to the position of each positioning post 1. The lower end of each positioning post 1 extends vertically downward from the lower surfaces of the two ends of the long side of the pressure plate 16 and is coaxially inserted into the corresponding sleeve. A fastening pin 3 is also horizontally provided on one side of the outer circumference of each sleeve. The fastening end of each fastening pin 3 extends radially along the corresponding sleeve into the interior of the corresponding sleeve and is abutted and fixed to the corresponding positioning post 1, thereby positioning the pressure plate 16 through the positioning post 1.

[0031] This utility model's binding assembly includes a binding strap, a positioning ring 7, and a tensioning buckle 18; as shown... Figures 1-3As shown, U-shaped limiting rods are symmetrically provided on the upper surface of both ends of the short side of the pressure plate 16. The opening groove of each limiting rod is set along the length of the short side of the pressure plate 16, and its two opening ends are fixed vertically downward to the corresponding positions on the upper surface of the pressure plate 16. The strap passes through the two limiting rods, and its two ends extend outward to the outside of the upper cover 15, and then extend vertically downward. Positioning rings 7 are also vertically symmetrically provided on the upper surface of the upper plate 8 relative to the two ends of the strap and relative to the outside of the chassis 6. The two ends of the strap are fixedly connected to the corresponding positioning rings 7, and a tension buckle 18 is provided on the strap on the side relative to the lower screen 5. The tension buckle 18 ensures that the strap 14 is fastened. Through the cooperation of the strap 14, the positioning rings 7 and the pressure plate 16, the upper cover 15, the upper screen 2, the lower screen 5 and the chassis 6 are fixed on the upper plate 8.

[0032] like Figures 1-3 As shown, the lower plate 13 is a horizontally arranged annular ring, and its outer diameter is consistent with that of the upper plate 8. It is horizontally and coaxially spaced directly below the upper plate 8. Several springs 12 are also vertically and evenly distributed along the circumference of the lower plate 13 and the upper plate 8 near the outer edge. The lower end of each spring 12 is fixedly connected to the corresponding position of the upper surface of the lower plate 13, and its upper end is fixedly connected to the corresponding position of the lower surface of the upper plate 8. A cylindrical body 24 with open upper and lower surfaces is also vertically and coaxially arranged on the lower surface of the lower plate 13. The inner diameter of the cylindrical body 24 is consistent with that of the lower plate 13, and its upper end is fixedly connected to the lower surface of the lower plate 13. The lower end of the cylindrical body 24 is fixedly connected to the middle position of the upper surface of the horizontally arranged fixed plate 10, and the lower plate 13 is fixed to the fixed plate 10 through the cylindrical body 24.

[0033] like Figures 1-3 As shown, a matching rotating door 9 is vertically embedded on one side of the outer circumferential surface of the cylinder 24, and one vertical side of the rotating door 9 is horizontally hinged to the cylinder 24. A handle 11 is also vertically provided on the outer surface of the rotating door 9 away from its hinge point, so that the rotating door 9 can be opened and closed by the handle 11.

[0034] like Figures 1-3As shown, inside the cylinder 24, a circular turntable 21 is horizontally coaxially arranged relative to the rotating door 9, and the diameter of the turntable 21 is smaller than the inner diameter of the cylinder 24; a motor 19 is vertically arranged in the middle of the lower surface of the upper plate 8, and the output end of the motor 19 is vertically downward, and is coaxially linked with the turntable 21 through a rotating shaft, thereby driving the turntable 21 to rotate horizontally inside the cylinder 24; on the upper surface of the turntable 21, counterweights 20 are symmetrically arranged horizontally on both sides, one end of each counterweight 20 is rotatably connected to the rotating shaft, and the other end is along the diameter of the turntable 21. The counterweight 20 is set outwards, and a pin hole matching the positioning pin is vertically embedded and opened at the other end of its upper surface. On the upper surface of the turntable 21, several scale holes matching the positioning pin are arranged at intervals along the circumference of the turntable 21 relative to the position of the pin hole as the counterweight 20 rotates. After the two counterweights 20 are adjusted by rotating horizontally around the axis, the two counterweights 20 are fixed on the turntable 21 by the cooperation of the positioning pin, pin hole and corresponding scale hole. Then, the center of gravity is adjusted so that the turntable 21 is unbalanced when it rotates.

[0035] The working principle of this utility model:

[0036] First, open the revolving door 9 using handle 11 and adjust the angle between the two counterweights 20 to adjust the center of gravity; after adjustment, close the revolving door 9.

[0037] Then, the two positioning pins 1 are fixed to the corresponding positions on the upper plate 8 by fastening pins 3. Then, the pressure plate 16, the upper cover 15, the upper screen 2, the lower screen 5, and the base plate 6 are stacked together coaxially from top to bottom and placed on the upper plate 8 together. During this process, the upper cover 15 and the upper screen 2 are fastened together by the cooperation of clamps 4 and buckles 17, the upper screen 2 and the lower screen 5 are fastened together by the cooperation of clamps 4 and buckles 17, and the lower end of the lower screen 5 is coaxially sleeved in the base plate 6.

[0038] Then, after the two ends of the bandage 14 are passed through the limiting rods on the pressure plate 16, they are fixedly connected to the corresponding positioning rings 7, and the bandage 14 is tightened by the tension buckle 18. At this time, the turntable 21 is driven by the motor 19 to rotate unbalancedly. Then, with the ultrasonic device II 22 and ultrasonic device I 23, the nickel-based alloy powder moves clockwise or counterclockwise on the upper screen 2 or the lower screen 5 according to the direction of rotation, so as to increase the movement trajectory of the nickel-based alloy powder. The longer the screening path, the higher the screening accuracy, thus performing double screening of the nickel-based alloy powder, and collecting the screened nickel-based alloy powder into the chassis 6.

[0039] The beneficial effects of this utility model are:

[0040] (1) This utility model has a simple structure and reliable sealing, which improves screening efficiency and screening accuracy, reduces the occurrence of screen hole blockage, and while meeting the screening requirements in the nickel-based alloy processing process, it also reduces labor costs and maintenance costs.

[0041] (2) This utility model can be quickly assembled and disassembled by using the bandage 14, positioning ring 7, pressure plate 16, clamp 4 and buckle 17 together, thereby greatly improving work efficiency.

[0042] (3) The present invention adopts an adjustable angle design between two counterweights 20. By adjusting the center of gravity, the turntable 21 will be unbalanced when it rotates, so that the nickel-based alloy powder will move clockwise or counterclockwise on the upper screen 2 or the lower screen 5 according to the direction of rotation, thereby increasing the screening path of the nickel-based alloy powder and improving the screening accuracy.

[0043] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the concept and scope of the present utility model. Without departing from the design concept of the present utility model, all modifications and improvements made by those skilled in the art to the technical solutions of the present utility model should fall within the protection scope of the present utility model. The technical content for which protection is sought in the present utility model has been fully recorded in the technical requirements.

Claims

1. A standard sieve device for nickel-based alloys, characterized in that: The device includes a pressure plate, a binding assembly, a top cover, an upper screen, a lower screen, a base, an upper plate, an ultrasonic device I, and an ultrasonic device II. The top cover, upper screen, lower screen, and base are all matching circular shapes, stacked horizontally and coaxially from top to bottom, and placed coaxially on the upper surface of the horizontally positioned upper plate via the base. A pressure plate is horizontally attached to the upper surface of the top cover, and the pressure plate, in conjunction with the binding assembly, secures the top cover, upper screen, lower screen, and base to the upper plate. An ultrasonic device I is also linked to one side of the outer circumference of the upper screen, and the ultrasonic device I, in conjunction with the upper screen, performs a first-stage sieving of the nickel-based alloy powder. An ultrasonic device II is also linked to one side of the outer circumference of the lower screen, and the ultrasonic device II, in conjunction with the lower screen, performs a second-stage sieving of the nickel-based alloy powder.

2. The standard sieve device for nickel-based alloys according to claim 1, characterized in that: It also includes clamps and buckles; the upper and lower screens are both integrally formed from hollow cylindrical sealing plates with open upper and lower ends and a screen set at the bottom, and the upper end of the upper screen matches the upper cover, and the lower end of the upper screen matches the upper end of the lower screen; at the joint between the upper cover and the upper screen, and at the joint between the upper screen and the lower screen, a matching clamp is also coaxially sleeved, and at the locking point of each clamp, a matching buckle is also snapped in place, and the upper cover, the upper screen and the lower screen are coaxially connected together through the cooperation of the buckle and the corresponding clamp.

3. The standard sieve device for nickel-based alloys according to claim 2, characterized in that: The upper screen has a mesh size of 100 mesh, and the lower screen has a mesh size of 270 mesh.

4. The standard sieve device for nickel-based alloys according to claim 2, characterized in that: The chassis is a vertically arranged hollow cylindrical structure with an open upper end. The upper end of the chassis extends outward in a trumpet shape and then vertically upwards coaxially flanged, so that the inner diameter of the upper end of the chassis is larger than the inner diameter of the lower end. The outer diameter of the lower end of the lower screen matches the inner diameter of the upper end of the chassis and is larger than the inner diameter of the lower end of the chassis, so that the lower end of the lower screen is coaxially fitted into the upper end of the chassis.

5. The standard sieve device for nickel-based alloys according to claim 4, characterized in that: An anti-slip pad is also provided horizontally and coaxially between the lower end of the chassis and the upper surface of the upper plate. The anti-slip pad is circular and matches the lower end of the chassis. The chassis is placed on the upper plate through the anti-slip pad, thereby preventing the chassis from slipping.

6. The standard sieve device for nickel-based alloys according to claim 4, characterized in that: The pressure plate is a cross shape with two long and two short sections. Both ends of its long sides extend horizontally outward beyond the coverage area of ​​the chassis. Vertically symmetrical positioning posts are also provided on the upper surface of both ends of its long sides extending beyond the chassis. The two positioning posts are spaced apart on the outer side of the upper cover, upper screen, lower screen, and chassis. A sleeve matching the positioning post is vertically fixed on the upper surface of the upper plate relative to the position of each positioning post. The lower end of each positioning post extends vertically downward beyond the lower surface of both ends of the long side of the pressure plate and is coaxially inserted into the corresponding sleeve. A fastening pin is horizontally provided on one side of the outer circumference of each sleeve. The fastening end of each fastening pin extends radially along the corresponding sleeve into the interior of the corresponding sleeve and is abutted and fixed against the corresponding positioning post, thereby positioning the pressure plate through the positioning posts.

7. A standard sieve device for nickel-based alloys according to claim 6, characterized in that: The binding assembly includes a binding strap, positioning rings, and tension buckles. U-shaped limiting rods are symmetrically arranged on the upper surface of both ends of the short side of the pressure plate. The opening groove of each limiting rod is arranged along the length of the short side of the pressure plate, and both opening ends are vertically downward and fixed to corresponding positions on the upper surface of the pressure plate. The binding strap passes between the two limiting rods, and both ends extend outward to the outside of the upper cover before extending vertically downward. Positioning rings are symmetrically arranged vertically on the upper surface of the upper plate, relative to the ends of the binding strap and relative to the outside of the chassis. The ends of the binding strap are fixedly connected to the corresponding positioning rings, and tension buckles are provided on the binding strap on the side relative to the lower screen. The tension buckles ensure the binding strap is secure, and through the cooperation of the binding strap, positioning rings, and pressure plate, the upper cover, upper screen, lower screen, and chassis are fixed to the upper plate.

8. A standard sieve device for nickel-based alloys according to claim 1, characterized in that: It also includes a lower plate, springs, a cylinder, and a fixing plate; the lower plate is a horizontally arranged annular ring, and its outer diameter is consistent with the outer diameter of the upper plate, and it is horizontally and coaxially spaced directly below the upper plate; several springs are also vertically and evenly distributed along the circumference of the lower plate and the upper plate near the outer edge of the lower plate, and the lower end of each spring is fixedly connected to the corresponding position of the upper surface of the lower plate, and its upper end is fixedly connected to the corresponding position of the lower surface of the upper plate; a cylinder with open upper and lower surfaces is also vertically and coaxially arranged on the lower surface of the lower plate, the inner diameter of the cylinder is consistent with the inner diameter of the lower plate, and its upper end is fixedly connected to the lower surface of the lower plate coaxially, and the lower end of the cylinder is fixedly connected to the middle position of the upper surface of the horizontally arranged fixing plate, and the lower plate is fixed to the fixing plate through the cylinder.

9. A standard sieve device for nickel-based alloys according to claim 8, characterized in that: It also includes a rotating door and a handle; a matching rotating door is vertically embedded on one side of the outer circumference of the cylinder, and one vertical side of the rotating door is horizontally hinged to the cylinder. A handle is also vertically provided on the outer surface of the rotating door away from its hinge point, so that the rotating door can be opened and closed by the handle.

10. A standard sieve device for nickel-based alloys according to claim 9, characterized in that: It also includes a motor, a rotating shaft, a turntable, counterweights, and positioning pins; inside the cylinder, a circular turntable is horizontally coaxially positioned relative to the rotating door, and the diameter of the turntable is smaller than the inner diameter of the cylinder; a motor is vertically positioned at the center of the lower surface of the upper plate, with its output end vertically downwards, and is coaxially linked to the turntable via a rotating shaft, thereby driving the turntable to rotate horizontally within the cylinder; symmetrically arranged counterweights are horizontally positioned on the upper surface of the turntable, with one end of each counterweight rotatably connected to the rotating shaft, and its... The other end is arranged radially outward along the turntable, and a pin hole matching the positioning pin is vertically embedded and opened at the other end position on its upper surface; on the upper surface of the turntable, relative to the position of the pin hole as the counterweight rotates, there are several scale holes matching the positioning pin arranged sequentially along the circumference of the turntable. After the two counterweights are adjusted by rotating horizontally around the axis, the two counterweights are fixed on the turntable by the cooperation of the positioning pin, pin hole and corresponding scale hole, and then the center of gravity is adjusted to make the turntable unbalanced when it rotates.

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