Nitrogen protection type powder material screening equipment

Abstract

The invention relates to the technical field of screening equipment, in particular to nitrogen protection type powder material screening equipment. The screening device comprises a screening box, the vertical inner wall of the screening box is fixedly connected with a screening mechanism, the top of the screening box fixedly communicates with a feeding pipe, a discharging opening is formed in the side wall of the left side of the screening box, a guiding groove is fixedly connected into the discharging opening, and the bottom of the screening box fixedly communicates with a discharging pipe; the screening box is fixedly sleeved with a protective cover, a through hole is formed in the upper side of the protective cover, and the upper end of the feeding pipe penetrates through the protective cover through the through hole. According to the neodymium-iron-boron magnetic powder screening equipment, the temperature in the screening box can be reduced, the probability of dust explosion of the screening equipment is effectively reduced, the screening box can be isolated through nitrogen, and therefore damage caused by dust explosion during screening can be reduced, and the use safety of the neodymium-iron-boron magnetic powder screening equipment is effectively improved; and the screening effect of the neodymium iron boron magnetic powder screening equipment is effectively improved.

Description

Technical Field

[0001] The invention relates to the technical field of screening equipment, in particular to a nitrogen-protected powder material screening equipment. Background Art

[0002] NdFeB is a tetragonal crystal formed by neodymium, iron and boron. It is a rare earth permanent magnet material. NdFeB magnetic powder is an important raw material for producing NdFeB magnetic products. During the production and processing of NdFeB magnetic powder, it is necessary to screen the NdFeB magnetic powder so as to screen out the NdFeB magnetic powder whose size does not meet the requirements.

[0003] During the production and processing of existing NdFeB magnetic powder screening equipment, since the NdFeB material is in powder form and the space inside the screening equipment is relatively narrow, the sparks or high temperatures generated during the operation of the screening equipment can easily cause dust explosions in the NdFeB magnetic powder, thereby leading to production safety accidents. In addition, when the existing screening equipment is in use, the NdFeB magnetic powder stays on the screening screen for a short time, resulting in reduced screening effects. Summary of the invention

[0004] The object of the present invention is to provide a nitrogen-shielded powder material screening device to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] The present invention provides a nitrogen-protected powder material screening device, comprising a screening box, a screening mechanism is fixedly connected to the vertical inner wall of the screening box, a feed pipe is fixedly connected to the top of the screening box, a discharge port is provided on the side wall on the left side of the screening box, and a material guide trough is fixedly connected to the discharge port, a discharge pipe is fixedly connected to the bottom of the screening box, a protective cover is fixedly sleeved outside the screening box, a through hole is provided on the upper side of the protective cover, the upper end of the feed pipe passes through the protective cover through the through hole, a sealing tube is fixedly connected to the vertical side wall of the protective cover, one end of the sealing tube is fixedly connected to the vertical outer wall of the screening box, and the material guide trough is located in the sealing tube. A socket is provided at the bottom of the protective cover, and the discharge pipe passes through the protective cover through the socket, an air inlet pipe and an air outlet pipe are fixedly connected on the upper side of the protective cover, an air inlet valve is fixedly connected at the upper end of the air inlet pipe, and an air outlet valve is fixedly connected at the upper end of the air outlet pipe, a mounting plate is fixedly connected to the vertical outer wall of the protective cover, an air pump is fixedly connected to the mounting plate, the air outlet of the air pump is connected to the air inlet valve, a pressure gauge is fixedly connected to the side wall on the upper side of the protective cover, a thermometer is arranged on the top of the protective cover, a water tank is fixedly connected to the vertical outer wall of the protective cover, a serpentine pipe is fixedly connected on the vertical side wall of the protective cover, and the serpentine pipe passes through the water tank.

[0007] In the above-mentioned nitrogen-protected powder material screening equipment, the screening mechanism includes a plurality of fixed plates fixedly connected to the vertical inner wall of the screening box, a plurality of the fixed plates are fixedly connected to a fixed rod, a sliding plate is movably sleeved outside the fixed rod, a spring is fixedly connected between the sliding plate and the fixed plate, the spring is movably sleeved outside the fixed rod, a same material blocking frame is fixedly connected between the plurality of sliding plates, a sieve plate is fixedly connected to the bottom of the material blocking frame, the sieve plate is tilted, two vibrators are symmetrically fixedly connected to the vertical outer wall of the material blocking frame, a discharge hole corresponding to the material guide groove is opened on the left side of the material blocking frame, and a plurality of tilted guide plates are fixedly connected to the side wall on the upper side of the sieve plate.

[0008] In the above-mentioned nitrogen-shielded powder material screening equipment, four support columns are fixedly connected to the bottom of the protective cover. The four support columns are respectively located at the four corners of the bottom of the protective cover, and the lower ends of the four support columns are fixedly connected to foot seats.

[0009] In the above-mentioned nitrogen-shielded powder material screening equipment, a same reinforcing rib is fixedly connected between the side wall on the lower side of the mounting plate and the vertical outer wall of the protective cover, and connecting plates are fixedly connected between the reinforcing rib and the outer walls of the mounting plate and the protective cover.

[0010] In the above-mentioned nitrogen-shielded powder material screening equipment, a same guide groove is fixedly connected between the four support columns, the guide groove is inclined, and the guide groove is located below the discharge pipe.

[0011] In the above-mentioned nitrogen-shielded powder material screening equipment, a plurality of pin holes are provided on the plurality of foot seats, and the plurality of pin holes are evenly distributed on the foot seats.

[0012] In the above-mentioned nitrogen-shielded powder material screening equipment, the water tank includes a box body fixedly connected to the outer wall of the protective cover, the upper side of the box body is fixedly connected to a water inlet pipe, the bottom of the box body is fixedly connected to a drain pipe, and the end of the drain pipe away from the box body is fixedly connected to a water stop valve.

[0013] In the above-mentioned nitrogen-shielded powder material screening equipment, an internally threaded pipe is fixedly connected to the upper side of the protective cover, an externally threaded pipe is fixedly sleeved on the thermometer, and the externally threaded pipe is threadedly sleeved in the internally threaded pipe.

[0014] In the above-mentioned nitrogen-shielded powder material screening equipment, a conical bucket is fixedly connected to the upper end of the feed pipe, and the diameter of the upper end of the conical bucket is larger than the diameter of the lower end.

[0015] In the above-mentioned nitrogen-shielded powder material screening equipment, a sealing pipe cover is provided on the pipe wall thread sleeve near the upper end of the water inlet pipe.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The present invention is provided with a screening box, a feed pipe, a guide trough, a discharge pipe, a protective cover, a sealing pipe, an air inlet pipe, an air outlet pipe, an air inlet valve, an air outlet valve, a mounting plate, an air pump, a pressure gauge, a thermometer, a water tank and a serpentine pipe. When in use, NdFeB magnetic powder is added to the screening box through the feed pipe, the NdFeB magnetic powder falls onto the screening mechanism, the screening mechanism screens the NdFeB magnetic powder, and the screened NdFeB magnetic powder is discharged through the discharge pipe and the guide trough respectively, the air inlet valve is opened, the air outlet valve is closed, and nitrogen is introduced into the protective cover through the air pump, so that the nitrogen fills the protective cover and the screening box. The cavity between the selection boxes monitors the air pressure in the protective cover through a pressure gauge to ensure sufficient nitrogen addition. Water is added to the water tank. When the nitrogen passes through the serpentine tube, the water can cool the nitrogen, thereby reducing the temperature of the nitrogen in the protective cover. It can also assist in heat dissipation of the screening box inside the protective cover, thereby reducing the temperature inside the screening box, effectively reducing the probability of dust explosion in the screening equipment. Nitrogen can isolate the screening box, thereby reducing the damage caused by dust explosion during screening, and effectively improving the safety of the use of NdFeB magnetic powder screening equipment.

[0018] 2. The present invention is equipped with a fixed plate, a fixed rod, a sliding plate, a spring, a material blocking frame, a screen plate, a vibrator, a discharge hole and a guide plate. When in use, the two vibrators are controlled to operate, the two vibrators drive the material blocking frame to vibrate, the material blocking frame drives multiple sliding plates to slide on multiple fixed rods, the multiple springs can increase the vibration frequency of the material blocking frame, the material blocking frame drives the screen plate to vibrate at a high frequency, the screen plate can efficiently screen the NdFeB magnetic powder material, the multiple guide plates can increase the residence time of the NdFeB magnetic powder material on the screen plate, thereby improving the screening effect of the NdFeB magnetic powder material, and effectively improving the screening effect of the NdFeB magnetic powder material screening equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 It is a structural schematic diagram of another aspect of the present invention;

[0021] Figure 3 It is a front view of the present invention;

[0022] Figure 4 is a side view of the present invention;

[0023] Figure 5 This is a schematic diagram of the structure of the present invention after the cover plate is removed;

[0024] Figure 6 for Figure 1 The structural diagram of the screening box;

[0025] Figure 7 for Figure 1 Schematic diagram of the installation structure of the screening mechanism;

[0026] Figure 8 for Figure 1 Schematic diagram of the structure of the screening mechanism;

[0027] Fig. 9 for Figure 1 Schematic diagram of the internal structure of the grey water tank.

[0028] In the figure: 1, screening box; 2, feed pipe; 3, guide trough; 4, discharge pipe; 5, protective cover; 6, sealing pipe; 7, air inlet pipe; 8, air outlet pipe; 9, air inlet valve; 10, air outlet valve; 11, mounting plate; 12, air pump; 13, pressure gauge; 14, thermometer; 15, water tank; 16, serpentine pipe; 17, fixing plate; 18, fixing rod; 19, sliding plate; 20, spring; 2 1. Material retaining frame; 22. Screen plate; 23. Vibrator; 24. Discharge hole; 25. Guide plate; 26. Support column; 27. Footrest; 28. Reinforcement rib; 29. ​​Connecting plate; 30. Guide groove; 31. Pin hole; 32. Box body; 33. Water inlet pipe; 34. Drain pipe; 35. Water stop valve; 36. Internally threaded pipe; 37. Externally threaded pipe; 38. Conical bucket; 39. Sealing pipe cover. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] See also Figure 1-9The present invention provides a nitrogen-protected powder material screening device, comprising a screening box 1, a screening mechanism is fixedly connected to the vertical inner wall of the screening box 1, a feed pipe 2 is fixedly connected to the top of the screening box 1, a discharge port is provided on the side wall on the left side of the screening box 1, and a guide trough 3 is fixedly connected to the discharge port, a discharge pipe 4 is fixedly connected to the bottom of the screening box 1, a protective cover 5 is fixedly sleeved outside the screening box 1, a through hole is provided on the upper side of the protective cover 5, the upper end of the feed pipe 2 passes through the protective cover 5 through the through hole, a sealing tube 6 is fixedly connected to the vertical side wall of the protective cover 5, one end of the sealing tube 6 is fixedly connected to the vertical outer wall of the screening box 1, the guide trough 3 is located in the sealing tube 6, and the bottom of the protective cover 5 A socket is opened, and the discharge pipe 4 passes through the protective cover 5 through the socket, the upper side of the protective cover 5 is fixedly connected with an air inlet pipe 7 and an air outlet pipe 8, the upper end of the air inlet pipe 7 is fixedly connected with an air inlet valve 9, and the upper end of the air outlet pipe 8 is fixedly connected with an air outlet valve 10, the vertical outer wall of the protective cover 5 is fixedly connected with a mounting plate 11, and an air pump 12 is fixedly connected to the mounting plate 11, and the air outlet of the air pump 12 is connected to the air inlet valve 9, the side wall on the upper side of the protective cover 5 is fixedly connected with a pressure gauge 13, and a thermometer 14 is arranged on the top of the protective cover 5, the vertical outer wall of the protective cover 5 is fixedly connected with a water tank 15, and the vertical side wall of the protective cover 5 is fixedly connected with a serpentine pipe 16, and the serpentine pipe 16 passes through the water tank 15.

[0031] In the above embodiment, when in use, NdFeB magnetic powder is added into the screening box 1 through the feed pipe 2, and the NdFeB magnetic powder falls onto the screening mechanism, which screens the NdFeB magnetic powder. The screened NdFeB magnetic powder is discharged through the discharge pipe 4 and the guide trough 3, respectively. The air inlet valve 9 is opened, the air outlet valve 10 is closed, and nitrogen is introduced into the protective cover 5 through the air pump 12, so that the nitrogen fills the cavity between the protective cover 5 and the screening box 1, and the air pressure in the protective cover 5 is monitored by the pressure gauge 13, so as to ensure Adequate nitrogen is added, and water is added into the water tank 15. When the nitrogen passes through the serpentine tube 16, the water can cool the nitrogen, thereby reducing the temperature of the nitrogen in the protective cover 5, and can assist in heat dissipation of the screening box 1 inside the protective cover 5, thereby reducing the temperature inside the screening box 1, effectively reducing the probability of dust explosion in the screening equipment, and the nitrogen can isolate the screening box 1, thereby reducing the damage caused by dust explosion during screening, and effectively improving the safety of the use of the NdFeB magnetic powder screening equipment.

[0032] The screening mechanism includes a plurality of fixed plates 17 fixedly connected to the vertical inner wall of the screening box 1, a plurality of the fixed plates 17 are fixedly connected to a fixed rod 18, a sliding plate 19 is movably sleeved outside the fixed rod 18, a spring 20 is fixedly connected between the sliding plate 19 and the fixed plate 17, the spring 20 is movably sleeved outside the fixed rod 18, a same material blocking frame 21 is fixedly connected between the plurality of sliding plates 19, a sieve plate 22 is fixedly connected to the bottom of the material blocking frame 21, the sieve plate 22 is tilted, two vibrators 23 are symmetrically fixedly connected to the vertical outer wall of the material blocking frame 21, a discharge hole 24 corresponding to the material guide trough 3 is opened on the left side of the material blocking frame 21, and a plurality of tilted guide plates 25 are fixedly connected to the side wall on the upper side of the sieve plate 22.

[0033] In this embodiment, when in use, the two vibrators 23 are controlled to operate, the two vibrators 23 drive the material blocking frame 21 to vibrate, the material blocking frame 21 drives multiple sliding plates 19 to slide on multiple fixed rods 18, the multiple springs 20 provided can increase the frequency of vibration of the material blocking frame 21, the material blocking frame 21 drives the sieve plate 22 to vibrate at a high frequency, the sieve plate 22 can efficiently screen the NdFeB magnetic powder material, the multiple guide plates 25 provided can increase the time that the NdFeB magnetic powder material stays on the sieve plate 22, thereby improving the screening effect of the NdFeB magnetic powder material, and effectively improving the screening effect of the NdFeB magnetic powder material screening equipment.

[0034] Four support columns 26 are fixedly connected to the bottom of the protective cover 5 . The four support columns 26 are respectively located at the four corners of the bottom of the protective cover 5 . The lower ends of the four support columns 26 are fixedly connected to foot seats 27 .

[0035] In this embodiment, the support column 26 and the foot seat 27 cooperate with each other, which can improve the stability of the placement of the screening equipment and effectively improve the stability of the NdFeB magnetic powder screening equipment during operation.

[0036] A same reinforcing rib 28 is fixedly connected between the side wall of the lower side of the mounting plate 11 and the vertical outer wall of the protective cover 5 , and a connecting plate 29 is fixedly connected between the reinforcing rib 28 and the outer wall of the mounting plate 11 and the protective cover 5 .

[0037] In the above embodiment, the connecting plate 29 and the reinforcing ribs 28 cooperate with each other to reinforce the connection between the mounting plate 11 and the protective cover 5, and to support the mounting plate 11, thereby effectively improving the load-bearing performance of the mounting plate 11 and the stability of the operation of the air pump 12.

[0038] The same guide groove 30 is fixedly connected between the four support columns 26 . The guide groove 30 is inclined and is located below the discharge pipe 4 .

[0039] In this embodiment, the guide groove 30 is provided to receive the NdFeB magnetic powder material falling from the discharge pipe 4, and the NdFeB magnetic powder material can flow to the designated position along the inclined guide groove 30, effectively improving the convenience of collecting the NdFeB magnetic powder material.

[0040] A plurality of pin holes 31 are formed on each of the plurality of foot seats 27 , and the plurality of pin holes 31 are evenly distributed on the foot seats 27 .

[0041] In the above embodiment, the plurality of pin holes 31 can improve the convenience of fixing and installing the foot seat 27 .

[0042] The water tank 15 includes a box body 32 fixedly connected to the outer wall of the protective cover 5, a water inlet pipe 33 is fixedly connected to the upper side of the box body 32, a drain pipe 34 is fixedly connected to the bottom of the box body 32, and a water stop valve 35 is fixedly connected to one end of the drain pipe 34 away from the box body 32.

[0043] In this embodiment, when in use, water is added to the box body 32 through the water inlet pipe 33, the water stop valve 35 is opened, and the water in the box body 32 is discharged through the drain pipe 34. The operation is simple and convenient, which improves the convenience of adding and replacing water in the water tank 15.

[0044] An internal threaded tube 36 is fixedly connected to the upper side of the protective cover 5 , and an external threaded tube 37 is fixedly sleeved on the thermometer 14 . The external threaded tube 37 is threadedly sleeved in the internal threaded tube 36 .

[0045] In the above embodiment, the internally threaded tube 36 and the externally threaded tube 37 cooperate with each other, which can improve the convenience of installing the thermometer 14.

[0046] The upper end of the feed pipe 2 is fixedly connected with a conical bucket 38, and the diameter of the upper end of the conical bucket 38 is larger than the diameter of the lower end.

[0047] In this embodiment, the conical bucket 38 can improve the convenience of feeding through the feed pipe 2 and the convenience of adding NdFeB magnetic powder material to the screening equipment.

[0048] The water inlet pipe 33 is provided with a sealing pipe cover 39 on the pipe wall thread sleeve near the upper end.

[0049] In the above embodiment, the sealing pipe cover 39 is provided to seal the water inlet pipe 33 , thereby preventing dirt from entering the water tank 15 through the water inlet pipe 33 .

[0050] Working principle: When in use, NdFeB magnetic powder is added into the screening box 1 through the feed pipe 2, and the NdFeB magnetic powder falls onto the screening mechanism, which screens the NdFeB magnetic powder. The screened NdFeB magnetic powder is discharged through the discharge pipe 4 and the guide trough 3 respectively, and the air inlet valve 9 is opened, the air outlet valve 10 is closed, and nitrogen is introduced into the protective cover 5 through the air pump 12, so that the nitrogen fills the cavity between the protective cover 5 and the screening box 1, and the air pressure in the protective cover 5 is monitored by the pressure gauge 13, so as to ensure that the nitrogen The nitrogen is added sufficiently, and water is added into the water tank 15. When the nitrogen passes through the serpentine tube 16, the water can cool the nitrogen, thereby reducing the temperature of the nitrogen in the protective cover 5, and can assist in heat dissipation of the screening box 1 inside the protective cover 5, thereby reducing the temperature inside the screening box 1, effectively reducing the probability of dust explosion in the screening equipment, and the nitrogen can isolate the screening box 1, thereby reducing the damage caused by dust explosion in the screening, and effectively improving the safety of the use of the NdFeB magnetic powder screening equipment;

[0051] When in use, the two vibrators 23 are controlled to operate, the two vibrators 23 drive the blocking frame 21 to vibrate, the blocking frame 21 drives the multiple sliding plates 19 to slide on the multiple fixed rods 18, the multiple springs 20 provided can increase the vibration frequency of the blocking frame 21, the blocking frame 21 drives the sieve plate 22 to vibrate at a high frequency, the sieve plate 22 can efficiently screen the NdFeB magnetic powder material, the multiple guide plates 25 provided can increase the time that the NdFeB magnetic powder material stays on the sieve plate 22, thereby improving the screening effect of the NdFeB magnetic powder material, and effectively improving the screening effect of the NdFeB magnetic powder material screening equipment;

[0052] The support column 26 and the foot 27 cooperate with each other to improve the stability of the screening equipment, and effectively improve the stability of the NdFeB magnetic powder screening equipment during operation;

[0053] The connecting plate 29 and the reinforcing ribs 28 cooperate with each other to reinforce the connection between the mounting plate 11 and the protective cover 5, and to support the mounting plate 11, thereby effectively improving the load-bearing performance of the mounting plate 11 and the stability of the operation of the air pump 12;

[0054] The guide groove 30 is provided to receive the NdFeB magnetic powder material falling from the discharge pipe 4, and the NdFeB magnetic powder material can flow to a designated position along the inclined guide groove 30, which effectively improves the convenience of collecting the NdFeB magnetic powder material;

[0055] When in use, water is added to the box body 32 through the water inlet pipe 33, and the water stop valve 35 is opened, and the water in the box body 32 is discharged through the drain pipe 34. The operation is simple and convenient, which improves the convenience of adding and replacing water in the water tank 15;

[0056] The conical bucket 38 can improve the convenience of feeding the feed pipe 2 and the convenience of adding NdFeB magnetic powder to the screening equipment;

[0057] The provided sealing pipe cover 39 can seal the water inlet pipe 33 , thereby preventing dirt from entering the water tank 15 through the water inlet pipe 33 .

[0058] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0059] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A nitrogen-shielded powder material screening device, comprising a screening box (1), characterized in that: The vertical inner wall of the screening box (1) is fixedly connected with a screening mechanism, the top of the screening box (1) is fixedly connected with a feed pipe (2), the side wall on the left side of the screening box (1) is provided with a discharge port, and a guide trough (3) is fixedly connected in the discharge port, and the bottom of the screening box (1) is fixedly connected with a discharge pipe (4), the screening box (1) is fixedly sleeved with a protective cover (5) on the outside, a through hole is provided on the upper side of the protective cover (5), the upper end of the feed pipe (2) passes through the protective cover (5) through the through hole, the vertical side wall of the protective cover (5) is fixedly connected with a sealing pipe (6), one end of the sealing pipe (6) is fixedly connected with the vertical outer wall of the screening box (1), the guide trough (3) is located in the sealing pipe (6), the bottom of the protective cover (5) is provided with a socket, and the discharge pipe (4) passes through the protective cover through the socket. A protective cover (5), wherein an air inlet pipe (7) and an air outlet pipe (8) are fixedly connected on the upper side of the protective cover (5), an air inlet valve (9) is fixedly connected to the upper end of the air inlet pipe (7), and an air outlet valve (10) is fixedly connected to the upper end of the air outlet pipe (8). A mounting plate (11) is fixedly connected to the vertical outer wall of the protective cover (5), an air pump (12) is fixedly connected to the mounting plate (11), and the air outlet of the air pump (12) is connected to the air inlet valve (9). A pressure gauge (13) is fixedly connected to the side wall on the upper side of the protective cover (5), and a thermometer (14) is arranged on the top of the protective cover (5). A water tank (15) is fixedly connected to the vertical outer wall of the protective cover (5), and a serpentine pipe (16) is fixedly connected to the vertical side wall of the protective cover (5), and the serpentine pipe (16) passes through the water tank (15).

2. The nitrogen-shielded powder material screening device according to claim 1, characterized in that: The screening mechanism comprises a plurality of fixed plates (17) fixedly connected to the vertical inner wall of the screening box (1), a plurality of the fixed plates (17) are fixedly connected to fixed rods (18), a sliding plate (19) is movably sleeved outside the fixed rod (18), a spring (20) is fixedly connected between the sliding plate (19) and the fixed plate (17), the spring (20) is movably sleeved outside the fixed rod (18), a same material blocking frame (21) is fixedly connected between the plurality of sliding plates (19), a sieve plate (22) is fixedly connected to the bottom of the material blocking frame (21), the sieve plate (22) is tilted, two vibrators (23) are symmetrically fixedly connected to the vertical outer wall of the material blocking frame (21), a material discharge hole (24) corresponding to the material guide groove (3) is opened on the left side of the material blocking frame (21), and a plurality of tilted guide plates (25) are fixedly connected to the side wall on the upper side of the sieve plate (22).

3. The nitrogen-shielded powder material screening device according to claim 2, characterized in that: Four support columns (26) are fixedly connected to the bottom of the protective cover (5), and the four support columns (26) are respectively located at the four corners of the bottom of the protective cover (5), and the lower ends of the four support columns (26) are fixedly connected to foot seats (27).

4. The nitrogen-shielded powder material screening device according to claim 1, characterized in that: A same reinforcing rib (28) is fixedly connected between the side wall on the lower side of the mounting plate (11) and the vertical outer wall of the protective cover (5), and a connecting plate (29) is fixedly connected between the reinforcing rib (28) and the outer walls of the mounting plate (11) and the protective cover (5).

5. The nitrogen-shielded powder material screening device according to claim 3, characterized in that: The same guide groove (30) is fixedly connected between the four support columns (26), the guide groove (30) is arranged obliquely, and the guide groove (30) is located below the discharge pipe (4).

6. The nitrogen-shielded powder material screening device according to claim 3, characterized in that: A plurality of pin holes (31) are provided on each of the plurality of foot seats (27), and the plurality of pin holes (31) are evenly distributed on the foot seats (27).

7. The nitrogen-shielded powder material screening device according to claim 1, characterized in that: The water tank (15) comprises a box body (32) fixedly connected to the outer wall of the protective cover (5); a water inlet pipe (33) is fixedly connected to the upper side of the box body (32); a drain pipe (34) is fixedly connected to the bottom of the box body (32); and a water stop valve (35) is fixedly connected to one end of the drain pipe (34) away from the box body (32).

8. The nitrogen-shielded powder material screening device according to claim 1, characterized in that: The upper side of the protective cover (5) is fixedly connected to an internal threaded tube (36), and the thermometer (14) is fixedly sleeved with an external threaded tube (37), which is threadedly sleeved in the internal threaded tube (36).

9. The nitrogen-shielded powder material screening device according to claim 1, characterized in that: The upper end of the feed pipe (2) is fixedly connected to a conical bucket (38), and the diameter of the upper end of the conical bucket (38) is larger than the diameter of the lower end.

10. The nitrogen-shielded powder material screening device according to claim 7, characterized in that: A sealing pipe cover (39) is provided on the pipe wall thread sleeve near the upper end of the water inlet pipe (33).

Images