Reliable unpowered powder concentrator

Abstract

The utility model relates to the technical field of accessory devices of non-power powder concentrators, in particular to a reliable non-power powder concentrator and a non-power efficient powder concentrator, which can adjust wind power of machine-made sand particles and stone powder particles according to requirements so as to separate the stone powder particles with different sizes, so that workers can conveniently use the equipment, and the working efficiency is improved. Therefore, the practicability of the reliable unpowered powder concentrator is enhanced. Comprising a non-power powder concentrator body and a plurality of first material blocking plates, a feeding hopper assembly is arranged at the top end of the non-power powder concentrator body, a first air inlet pipe is arranged on the left side of the top of the feeding hopper assembly, an air outlet pipe is arranged at the right end of the non-power powder concentrator body, and a stone powder collecting assembly is arranged at the bottom end of the air outlet pipe; a cover plate assembly is arranged at the top end of the air outlet pipe, and a maintenance assembly is arranged at the front end of the non-power powder concentrator body.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of non-power powder concentrator accessory, particularly to a reliable non-power powder concentrator. BACKGROUND

[0002] At present, with the increasing attention to environmental protection, the traditional yellow sand mining is restricted, and the application of machine-made sand is more and more widely used. In the production process of machine-made sand, the stones are crushed into machine-made sand particles. Stone powder particles are generated in the crushing process. Therefore, it is necessary to separate machine-made sand particles and stone powder particles. The existing separation equipment has complex structure, contains various high-power power equipment in the structure, has large energy consumption, and has low separation efficiency and poor separation effect. SUMMARY

[0003] To solve the above technical problems, the utility model provides a non-power efficient powder concentrator, which can adjust the wind force of machine-made sand particles and stone powder particles according to the needs, so as to separate stone powder particles of different sizes, thereby facilitating the use of equipment by workers, and thus enhancing the practicability of a reliable non-power powder concentrator.

[0004] The utility model relates to a reliable non-power powder concentrator, which comprises a non-power powder concentrator body and a plurality of first material blocking plates, a feed hopper assembly is arranged at the top end of the non-power powder concentrator body, a first air inlet pipe is arranged at the top left side of the feed hopper assembly, an air outlet pipe is arranged at the right end of the non-power powder concentrator body, a stone powder collecting assembly is arranged at the bottom end of the air outlet pipe, a cover plate assembly is arranged at the top end of the air outlet pipe, a maintenance assembly is arranged at the front end of the non-power powder concentrator body, a discharge port is arranged at the bottom end of the non-power powder concentrator body, an auxiliary air force assembly is arranged at the right end of the bottom of the non-power powder concentrator body, a cavity is arranged in the non-power powder concentrator body, air force adjusting assemblies are arranged on the first air inlet pipe and the air outlet pipe respectively, a first material blocking frame is arranged in the middle of the cavity, and the inner end of the fixed frame is connected with the plurality of first material blocking plates.

[0005] Preferably, the air force adjusting assembly comprises two groups of fixed blocks, two groups of rotating rods and four groups of disc valve pieces, the front end of the non-power powder concentrator body is connected with the two groups of fixed blocks, the front end of the two groups of fixed blocks is respectively provided with a first through threaded hole, the front end of the non-power powder concentrator body is provided with a first through hole, the rear end of the cavity is provided with a first screw hole, the front side and the rear end outer wall of the two groups of rotating rods are respectively provided with a first thread and a second thread, the two groups of first threads are respectively screwed with the first through threaded hole, the two groups of second threads are respectively screwed with the first screw hole, the two groups of rotating rods are respectively provided with a first limiting block, the top end and the bottom end of the two groups of rotating rods are respectively connected with the disc valve pieces, and the front end of the two groups of rotating rods is respectively connected with a rotating wheel.

[0006] Preferably, the stone powder collecting assembly comprises two sets of clamping sliding blocks, a collecting box and a dust filter screen, the top end of the collecting box is connected with the two sets of clamping sliding blocks, the bottom end of the air outlet pipe is provided with a discharge port, the bottom end of the discharge port is provided with two sets of clamping sliding grooves, the two sets of clamping sliding blocks are respectively slidably clamped with the clamping sliding grooves, the front end, the rear end and the bottom end of the chamber are respectively provided with clamping grooves, and the front end, the rear end and the bottom end of the dust filter screen are respectively clamped with the clamping grooves.

[0007] Preferably, the cover plate assembly comprises a cover plate and six sets of first screws, the top end of the air outlet pipe is provided with a through hole, the top end of the through hole is provided with six sets of fixed threaded holes, the top end of the cover plate is provided with six sets of fixed through holes, the bottom end of the cover plate is provided with a clamping ring, the clamping ring is clamped with the through hole, and the six sets of first screws are respectively threadedly connected through the fixed through holes and the fixed threaded holes.

[0008] Preferably, the feeding hopper assembly comprises a feeding hopper and ten sets of second screws, the top outer wall of the non-powered powder classifier body is provided with a first fixed frame, the top end of the chamber is provided with a sealing ring, the sealing ring is clamped with the bottom inner wall of the feeding hopper, the left end of the feeding hopper is provided with an air inlet pipe, the bottom outer wall of the feeding hopper is provided with a second fixed frame, the first fixed frame is provided with ten sets of mounting threaded holes, the second fixed frame is provided with ten sets of mounting through holes, and the ten sets of second screws are respectively threadedly connected through the mounting through holes and the mounting threaded holes.

[0009] Preferably, the maintenance assembly comprises a rotating rod, the front end of the non-powered powder classifier body is provided with a maintenance opening, the front end of the maintenance opening is provided with a hinged box door, the front end of the box door is provided with a third through hole, the third through hole is bearing-connected with the rotating rod, the upper end of the rotating rod is provided with a second limiting block, the rear end of the rotating rod is provided with a clamping rod, and the front end of the rotating rod is provided with a handle rod.

[0010] Preferably, the auxiliary air force assembly comprises a clamping sliding plate and a baffle, the bottom right end of the non-powered powder classifier body is provided with a second air inlet pipe, the top end of the second air inlet pipe is provided with a through clamping opening, the through clamping opening is slidably sleeved with the clamping sliding plate, the top end of the clamping sliding plate is connected with the baffle, the top end of the baffle is provided with a second through threaded hole, a third screw is threadedly connected with the second through threaded hole, the front end and the rear end of the air guide frame are respectively connected with the chamber, the top end of the air guide frame is provided with an air outlet, and three sets of second material blocking plates are arranged in the air outlet.

[0011] Preferably, the auxiliary air force assembly comprises a clamping sliding plate and a baffle, the bottom right end of the non-powered powder classifier body is provided with a second air inlet pipe, the top end of the second air inlet pipe is provided with a through clamping opening, the through clamping opening is slidably sleeved with the clamping sliding plate, the top end of the clamping sliding plate is connected with the baffle, the top end of the baffle is provided with a second through threaded hole, a third screw is threadedly connected with the second through threaded hole, the front end and the rear end of the air guide frame are respectively connected with the chamber, the top end of the air guide frame is provided with an air outlet, and three sets of second material blocking plates are arranged in the air outlet.

[0012] The utility model discloses the beneficial effect compared with prior art is: the utility model discloses the innovative design through the wind power adjusting component (including butterfly valve piece, rotating rod and fixed block), realizes the accurate control to the inside wind of powder concentrator, makes the equipment can according to the stone powder particle of different particle size, and the size of wind power is flexibly adjusted, thereby improves the separation precision and efficiency, and then the stone powder collection component can filter the stone powder of bigger particle through the dust filter screen, and the stone powder after filtering will be discharged through the air outlet pipe, and bigger stone powder and smaller standard sand drop into the collection component, just the quick dismounting function of apron component and feed hopper component, further simplifies the maintenance process of equipment, and the design of auxiliary air force component allows the user to adjust the wind direction and size according to actual demand, enhances the flexibility and the adaptability of equipment to different working environment, separates the stone powder particle of different size in this way, thereby facilitates the use of equipment for worker, therefore enhances practicality. BRIEF DESCRIPTION OF DRAWINGS

[0013] Fig. 1 It is the connecting structure schematic diagram of the utility model;

[0014] Fig. 2 It is the apron and sealing ring connecting structure schematic diagram of the utility model;

[0015] Fig. 3 It is the rotating plate and clamping plate connecting structure schematic diagram of the utility model;

[0016] Fig. 4 It is the baffle and clamping sliding plate connecting structure schematic diagram of the utility model;

[0017] Mark in drawing: 1, non-power powder concentrator body;2, first air inlet pipe;3, air outlet pipe;4, discharge port;5, chamber;6, first material blocking frame;7, first material blocking plate;8, fixed block;9, two groups of rotating rods;10, first limit block;11, disc valve piece;12, collection box;13, clamping sliding block;14, dust filter screen;15, apron;16, clamping ring;17, first screw;18, feed hopper;19, first fixed frame;20, sealing ring;21, second fixed frame;22, second screw;23, box door;24, rotating rod;25, second limit block;26, clamping rod;27, handle rod;28, second air inlet pipe;29, clamping sliding plate;30, baffle;31, third screw;32, air guide frame;33, second material blocking plate;34, guide plate;35, third screw;36, rotating wheel. DETAILED DESCRIPTION

[0018] The specific implementation of the utility model is described in further detail below in combination with the drawings and examples. The following examples are used to illustrate the utility model, but not to limit the scope of the utility model.

[0019] AsFigs. 1 to 4 As shown in the utility model discloses a reliable non -powerful powder concentrator, including non -powerful powder concentrator body 1 and multiple first material baffle 7, non -powerful powder concentrator body 1's top is provided with feed hopper 18 subassembly, the top left side of feed hopper 18 subassembly is provided with first air inlet pipe 2, non -powerful powder concentrator body 1's right end is provided with air outlet pipe 3, and the bottom of air outlet pipe 3 is provided with stone powder collection subassembly, and the top of air outlet pipe 3 is provided with cover plate 15 subassembly, and the front end of non -powerful powder concentrator body 1 is provided with maintenance subassembly, and the bottom of non -powerful powder concentrator body 1 is provided with discharge gate 4, and the bottom right end of non -powerful powder concentrator body 1 is provided with auxiliary wind force subassembly, and the inside of non -powerful powder concentrator body 1 is provided with chamber 5, and first air inlet pipe 2 and air outlet pipe 3 are respectively provided with wind force adjusting subassembly, and the middle part of chamber 5 is provided with first material baffle frame 6, and the inner end of fixed frame is connected with multiple first material baffle 7;The utility model discloses the innovative design of wind force adjusting subassembly (including butterfly valve piece, rotating lever and fixed block), realizes the accurate control to the wind force in the powder concentrator, makes the equipment can according to the stone powder particle of different particle size, and the size of wind force is flexibly adjusted, to improve the separation precision and efficiency, then stone powder collection subassembly can filter the stone powder with larger particles through the dust filter screen, and the filtered stone powder will be discharged through the air outlet pipe, and the larger stone powder and smaller sand drop into the collection subassembly, just the quick dismounting function of cover plate subassembly and feed hopper subassembly, further simplify the maintenance process of equipment, and the design of auxiliary wind force subassembly allows users to adjust the wind direction and size according to actual demand, enhances the flexibility of equipment and the adaptability to different working environments, to separate the stone powder particles of different sizes, so that the worker is convenient for the use of equipment, thus enhances practicality.

[0020] As the preferred embodiment of the above, the wind force adjusting subassembly includes two groups of fixed blocks 8, two groups of rotating levers 9 and four groups of butterfly valve pieces, the front end of the non -powerful powder concentrator body 1 is connected with the two groups of fixed blocks 8, the front end of the two groups of fixed blocks 8 is provided with a first through threaded hole, the front end of the non -powerful powder concentrator body 1 is provided with a first through hole, the rear end of the chamber 5 is provided with a first screw 17 hole, the front side and the rear end outer wall of the two groups of rotating levers 9 are respectively provided with a first thread and a second thread, the two groups of first threads are respectively screwed with the first through threaded hole, and the two groups of second threads are respectively screwed with the first threaded hole, the two groups of rotating levers 9 are respectively provided with a first limiting block 10, the top end and the bottom end of the two groups of rotating levers 9 are respectively connected with the disc valve piece 11, and the front end of the two groups of rotating levers 9 is respectively connected with the rotating wheel 36; when the wind force needs to be adjusted, the rotating wheel is rotated to drive the rotating lever to rotate, which drives the two groups of butterfly valves on the rotating lever to rotate, so as to adjust the wind force, thereby enhancing the practicality.

[0021] As the preferred of the above embodiment, the stone powder collecting assembly comprises two sets of clamping sliding blocks 13, a collecting box 12 and a dust filter screen 14, the top end of the collecting box 12 is connected with the two sets of clamping sliding blocks 13, the bottom end of the air outlet pipe 3 is provided with a discharge port, the bottom end of the discharge port is provided with two sets of clamping sliding grooves, the two sets of clamping sliding blocks 13 are respectively slidably clamped with the clamping sliding grooves, the front end, the rear end and the bottom end of the chamber 5 are respectively provided with clamping grooves, and the front end, the rear end and the bottom end of the dust filter screen 14 are respectively clamped with the clamping grooves; the stone powder blown by the wind can be filtered through the dust filter screen, so that the larger stone powder and the machine-made sand particles are filtered and treated, and then fall into the collecting box, and then when the collecting box needs to be cleaned, the collecting box is taken down through the clamping sliding grooves and the clamping sliding blocks, and then the collecting box can be cleaned, thereby enhancing the practicability.

[0022] As the preferred of the above embodiment, the cover plate 15 assembly comprises the cover plate 15 and six sets of first screws 17, the top end of the air outlet pipe 3 is provided with a through hole, the top end of the through hole is provided with six sets of fixed threaded holes, the top end of the cover plate 15 is provided with six sets of fixed through holes, the bottom end of the cover plate 15 is provided with a clamping ring 16, the clamping ring 16 is clamped with the through hole, and the six sets of first screws 17 are respectively threadedly connected with the fixed threaded holes and the fixed through holes; the cover plate can be clamped in the through hole through the clamping ring, and then the cover plate is fixed on the air outlet pipe through the six sets of first screws, so as to facilitate the maintenance and replacement of the filter screen in the later period, thereby enhancing the practicability.

[0023] As the preferred of the above embodiment, the feeding hopper assembly comprises a feeding hopper 18 and ten sets of second screws 22, a first fixed frame 19 is arranged on the top outer wall of the non-powered powder concentrator body 1, a sealing ring 20 is arranged at the top end of the chamber 5, the sealing ring 20 is clamped with the bottom inner wall of the feeding hopper 18, an air inlet pipe is arranged at the left end of the feeding hopper 18, a second fixed frame 21 is arranged on the bottom outer wall of the feeding hopper 18, ten sets of mounting threaded holes are arranged on the first fixed frame 19, ten sets of mounting through holes are arranged on the second fixed frame 21, and the ten sets of second screws 22 are respectively threadedly connected with the mounting threaded holes and the mounting through holes; the feeding hopper and the non-powered powder concentrator can be clamped through the sealing ring first, and then the first fixed frame and the second fixed frame are fixedly connected through the ten sets of second screws, so as to install the feeding hopper, thereby enhancing the practicability.

[0024] As the preferred of the above embodiment, the maintenance assembly comprises a rotating rod 24, the front end of the non-powered powder classifier body 1 is provided with a maintenance opening, the front end of the maintenance opening is provided with a hinged cabinet door 23, the front end of the cabinet door 23 is provided with a third through hole, the third through hole is bearing connected with the rotating rod 24, the upper end of the rotating rod 24 is provided with a second limiting block 25, the rear end of the rotating rod 24 is provided with a clamping rod 26, and the front end of the rotating rod 24 is provided with a handle rod 27; the rotating rod and the clamping rod can be driven to rotate through the handle rod, so as to release the clamping of the clamping rod and the chamber, and then the cabinet door is opened to maintain and repair the inside of the chamber, thereby enhancing the practicability.

[0025] As the preferred of the above embodiment, the auxiliary wind power assembly comprises a clamping sliding plate 29 and a baffle 30, the bottom right end of the non-powered powder classifier body 1 is provided with a second air inlet pipe 28, the top end of the second air inlet pipe 28 is provided with a clamping through hole, the clamping through hole is slidingly sleeved with the clamping sliding plate 29, the top end of the clamping sliding plate 29 is connected with the baffle 30, the top end of the baffle 30 is provided with a second through threaded hole, a third screw 31 is threadedly connected with the second through threaded hole, the front end and the rear end of a wind guide frame 32 are respectively connected with the chamber 5, the top end of the wind guide frame 32 is provided with an air outlet, and three groups of second material blocking plates 33 are arranged in the air outlet; the circulation of air into the chamber can be improved through the second air inlet pipe, so as to increase the wind power, the baffle and the clamping sliding plate can be driven to move upward by unloading the third screw, so as to control the wind power through the second air inlet, and the three groups of second material blocking plates arranged at the air outlet can prevent the mechanism sand from being discharged through the second air inlet, thereby enhancing the practicability.

[0026] As the preferred of the above embodiment, the auxiliary wind power assembly comprises a clamping sliding plate 29 and a baffle 30, the bottom right end of the non-powered powder classifier body 1 is provided with a second air inlet pipe 28, the top end of the second air inlet pipe 28 is provided with a clamping through hole, the clamping through hole is slidingly sleeved with the clamping sliding plate 29, the top end of the clamping sliding plate 29 is connected with the baffle 30, the top end of the baffle 30 is provided with a second through threaded hole, a third screw 31 is threadedly connected with the second through threaded hole, the front end and the rear end of a wind guide frame 32 are respectively connected with the chamber 5, the top end of the wind guide frame 32 is provided with an air outlet, and three groups of second material blocking plates 33 are arranged in the air outlet; the circulation of air into the chamber can be improved through the second air inlet pipe, so as to increase the wind power, the baffle and the clamping sliding plate can be driven to move upward by unloading the third screw, so as to control the wind power through the second air inlet, and the three groups of second material blocking plates arranged at the air outlet can prevent the mechanism sand from being discharged through the second air inlet, thereby enhancing the practicability.

[0027] The utility model discloses a reliable unpowered powder concentrator, its working principle is, when working, when carrying out mechanism sand powder selection, according to the size of mechanism sand, the adjustment of wind force is carried out, then through rotating two groups of rotating wheel drive rotating rod and butterfly valve and rotate, and two groups of first limit block will prevent two groups of rotating rod to separate first threaded hole, after through rotating third screw drive baffle and move upwards, when moving, the baffle will drive the clamping slide plate and move upwards, through clamping slide plate and open second air inlet pipe, then mechanism sand is introduced into the chamber from the feed hopper, and first air inlet pipe will blow mechanism sand to the right side of feed hopper, then through the inclined plane of feed hopper middle part and carry out the flow guide of mechanism sand, and mechanism sand will first contact with the flow guide plate, then through the collision of mechanism sand and flow guide plate and lift the stone powder and smaller mechanism sand in the chamber, then through first air inlet and second air inlet and discharge the stone powder through the air outlet pipe, when discharging, will pass through dust filter screen and block the larger particle, and the blocked particle will drop into the collection box, then when carrying out the cleaning of collection box, through clamping sliding slot and clamping sliding block and take down collection box, then clean up, then through clamping sliding slot and clamping sliding block and reinstallation can.

[0028] The terms "vertical", "horizontal", "left", "right", and similar expressions used herein are for illustrative purposes only.

[0029] The "first", "second", "third" in the utility model do not represent the specific quantity and order, and are only used for distinguishing names.

[0030] The above only is the preferred implementation mode of the utility model, and it should be pointed out that for ordinary skilled person in the prior art, on the premise of not departing from the technical principle of the utility model, can make a number of improvements and variations, and these improvements and variations also should be regarded as the protection scope of the utility model.

Claims

1. A reliable, non-powered air classifier characterized in that, The utility model provides a non -power powder concentrator, including non -power powder concentrator body (1) and multiple first material baffle (7), non -power powder concentrator body (1) top is provided with feeding hopper (18) subassembly, and the top left side of feeding hopper (18) subassembly is provided with first air inlet pipe (2), and the right -hand member of non -power powder concentrator body (1) is provided with air outlet pipe (3), and the bottom of air outlet pipe (3) is provided with stone powder collection subassembly, and the top of air outlet pipe (3) is provided with cover plate (15) subassembly, and the front end of non -power powder concentrator body (1) is provided with maintenance subassembly, and the bottom of non -power powder concentrator body (1) is provided with discharge gate (4), and the right -hand member of non -power powder concentrator body (1) bottom is provided with auxiliary wind force subassembly, and the inside of non -power powder concentrator body (1) is provided with chamber (5), and first air inlet pipe (2) and air outlet pipe (3) are provided with wind force adjusting subassembly respectively, and the middle part of chamber (5) is provided with first material baffle frame (6), and the inner end of fixed frame is connected with multiple first material baffle (7).

2. A reliable, non-powered classifier according to claim 1, wherein, The wind force adjusting subassembly includes two groups of fixed blocks (8), two groups of rotating rods (9) and four groups of butterfly valve pieces, the front end of non -power powder concentrator body (1) is connected with two groups of fixed blocks (8), the front end of two groups of fixed blocks (8) is respectively provided with a first through threaded hole, the front end of non -power powder concentrator body (1) is provided with a first through hole, the rear end of chamber (5) is provided with a first screw (17) hole, the front side and the rear end outer wall of two groups of rotating rods (9) are respectively provided with a first thread and a second thread, two groups of first threads are respectively screwed with the first through threaded hole, two groups of second threads are respectively screwed with the first threaded hole, the two groups of rotating rods (9) are respectively provided with a first limiting block (10), the top end and the bottom end of two groups of rotating rods (9) are respectively connected with the disc valve piece (11), and the front end of two groups of rotating rods (9) is respectively connected with the rotating wheel (36).

3. A reliable, non-powered powder selector as defined in claim 2, wherein, The stone powder collection subassembly includes two groups of clamping sliding blocks (13), a collection box (12) and a dust filter screen (14), the top end of the collection box (12) is connected with two groups of clamping sliding blocks (13), the bottom end of the air outlet pipe (3) is provided with a discharge opening, the bottom end of the discharge opening is provided with two groups of clamping sliding grooves, two groups of clamping sliding blocks (13) are respectively slidably clamped with the clamping sliding grooves, the front end, the rear end and the bottom end of the chamber (5) are respectively provided with clamping grooves, and the front end, the rear end and the bottom end of the dust filter screen (14) are respectively clamped with the clamping grooves.

4. A reliable, non-powered classifier according to claim 3, wherein, The cover plate (15) subassembly includes a cover plate (15) and six groups of first screws (17), the top end of the air outlet pipe (3) is provided with a through hole, the top end of the through hole is provided with six groups of fixed threaded holes, the top end of the cover plate (15) is provided with six groups of fixed through holes, the bottom end of the cover plate (15) is provided with a clamping ring (16), the clamping ring (16) is clamped with the through hole, and the six groups of first screws (17) are respectively screwed with the fixed threaded holes and the fixed threaded holes through the fixed through holes.

5. A reliable, non-powered classifier according to claim 4, wherein, The feeding hopper (18) assembly comprises the feeding hopper (18) and ten groups of second screws (22), the first fixed frame (19) is arranged on the top outer wall of the non-powered powder concentrator body (1), the sealing ring (20) is arranged at the top end of the cavity (5), the sealing ring (20) is clamped with the bottom inner wall of the feeding hopper (18), the air inlet pipe is arranged at the left end of the feeding hopper (18), the second fixed frame (21) is arranged on the bottom outer wall of the feeding hopper (18), the first fixed frame (19) is provided with ten groups of mounting threaded holes, the second fixed frame (21) is provided with ten groups of mounting through holes, and the ten groups of second screws (22) are respectively screwed through the mounting through holes and the mounting threaded holes.

6. A reliable, non-powered powder selector as defined in claim 5, wherein, The maintenance assembly comprises the rotating rod (24), the front end of the non-powered powder concentrator body (1) is provided with a maintenance opening, the front end of the maintenance opening is provided with the hinged box door (23), the front end of the box door (23) is provided with the third through hole, the third through hole is connected with the bearing of the rotating rod (24), the upper end of the rotating rod (24) is provided with the second limiting block (25), the rear end of the rotating rod (24) is provided with the clamping rod (26), and the front end of the rotating rod (24) is provided with the handle rod (27).

7. A reliable, non-powered powder selector as defined in claim 6, wherein, The auxiliary air force assembly comprises the clamping sliding plate (29) and the baffle (30), the bottom right end of the non-powered powder concentrator body (1) is provided with the second air inlet pipe (28), the top end of the second air inlet pipe (28) is provided with the through clamping opening, the through clamping opening is slidably sleeved with the clamping sliding plate (29), the top end of the clamping sliding plate (29) is connected with the baffle (30), the top end of the baffle (30) is provided with the second through threaded hole, the third screw (31) is screwed with the second through threaded hole, the front end and the rear end of the air guide frame (32) are respectively connected with the cavity (5), the top end of the air guide frame (32) is provided with the air outlet, and three groups of second material baffle plates (33) are arranged in the air outlet.

8. A reliable, non-powered powder selector as defined in claim 7, wherein, The air guide plate (34) and the two groups of fourth screws (35) are further arranged, the top end of the cavity (5) is provided with two groups of second threaded holes, the bottom end of the air guide plate (34) is provided with the abutting groove, the air guide plate (34) is tightly abutted with the cavity (5), the top end of the air guide plate (34) is provided with two groups of second through holes, and the two groups of fourth screws (35) are respectively screwed through the second through holes and the second threaded holes.

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