阅读说明：本技术 一种等离子喷涂设备的过滤机构 (Filtering mechanism of plasma spraying equipment ) 是由 高恒东 胡佳佳 于 2020-11-16 设计创作，主要内容包括：本发明涉及等离子喷涂技术领域,且公开了一种等离子喷涂设备的过滤机构,包括送粉设备、喷涂枪及过滤盒,所述送粉设备的出料端与过滤盒的右侧壁固定连接,所述过滤盒的内部固定设有过滤网,所述过滤盒的右侧壁固定连接有送粉管,且送粉管远离过滤盒的一端与喷涂枪的进料端固定连通,所述过滤盒的内侧壁位于过滤网左右两侧的位置均滑动连接有活动盒,所述过滤盒连接有驱动机构并通过驱动机构与两个活动盒连接。该等离子喷涂设备的过滤机构,可以有效避免不符合粒径的原料导致后续喷涂质量变差的现象,且可以避免过滤网被堵塞影响送粉效率,同时可以对不符合粒径要求的原料进行重新磨粉处理。(The invention relates to the technical field of plasma spraying, and discloses a filtering mechanism of plasma spraying equipment, which comprises powder feeding equipment, a spraying gun and a filtering box, wherein the discharge end of the powder feeding equipment is fixedly connected with the right side wall of the filtering box, a filtering net is fixedly arranged inside the filtering box, the right side wall of the filtering box is fixedly connected with a powder feeding pipe, one end of the powder feeding pipe, far away from the filtering box, is fixedly communicated with the feed end of the spraying gun, the positions, located on the left side and the right side of the filtering net, of the inner side wall of the filtering box are both connected with movable boxes in a sliding mode, and the filtering box is connected with a driving mechanism and is connected with the two movable boxes through the driving mechanism. The filtering mechanism of the plasma spraying equipment can effectively avoid the phenomenon that the raw materials which do not conform to the particle size lead to the deterioration of the subsequent spraying quality, can avoid the filter screen from being blocked to influence the powder feeding efficiency, and can carry out the re-grinding treatment on the raw materials which do not conform to the particle size requirement.)

1. The utility model provides a plasma spraying equipment's filtering mechanism, includes powder feeding equipment (1), spray gun (2) and filter cartridge (3), its characterized in that: the powder feeding device is characterized in that the discharge end of the powder feeding device (1) is fixedly connected with the right side wall of the filter box (3), a filter screen (4) is fixedly arranged in the filter box (3), the right side wall of the filter box (3) is fixedly connected with a powder feeding pipe (5), one end, far away from the filter box (3), of the powder feeding pipe (5) is fixedly communicated with the feed end of the spraying gun (2), the inner side wall of the filter box (3) is positioned on the left side and the right side of the filter screen (4) and is connected with a movable box (6) in a sliding mode, the filter box (3) is connected with a driving mechanism and is connected with two movable boxes (6) through the driving mechanism, a connecting pipe (7) is fixedly arranged in the movable box (6) on the left side, a plurality of uniformly distributed air injection heads (8) are fixedly connected on the right side of the pipe wall of the connecting pipe (7), and a processing box (, handle the fixed baffle (10) that is equipped with in inside of box (9) and divide into working chamber and grinding chamber through baffle (10), lower lateral wall fixedly connected with high compression pump (11) of working chamber, the end of breathing in of high compression pump (11) runs through the left side wall of working chamber, the output fixedly connected with gas-supply pipe (12) of high compression pump (11), the last lateral wall right-hand member of working chamber offer with gas-supply pipe (12) assorted slide opening, the one end that high compression pump (11) was kept away from in gas-supply pipe (12) is passed the slide opening and is run through the fixed intercommunication of lower tube wall of left activity box (6) lower extreme and connecting pipe (7), is located the right side the lower extreme fixedly connected with back flow (30) of activity box (6), the blanking hole has been seted up to the last lateral wall left end in grinding chamber, the left side wall upper end fixedly connected with fixed block in grinding chamber, and the lower extreme of back flow (30) passes the blanking hole and runs through the below that the upper end of fixed Put, the inside in mill powder chamber is equipped with crocus mechanism, it preheats the mechanism and is connected with spray gun (2) through preheating the mechanism to handle box (9) and be connected.

2. The filter mechanism of a plasma spray apparatus according to claim 1, wherein: the milling mechanism comprises a first motor (13), a milling base (14) and arc milling rollers (15), the lower end of the milling base (14) is fixedly connected with the lower side wall of a milling cavity, the left side wall and the right side wall of the milling cavity are fixedly connected with baffle plates (16) which are obliquely arranged, the lower ends of the two baffle plates (16) are respectively fixedly connected with the upper ends of the left side wall and the right side wall of the milling base (14), the arc milling rollers (15) are arranged above the milling base (14), the upper end of the milling base (14) is provided with arc milling grooves matched with the arc milling rollers (15), the side walls of the arc milling rollers (15) are fixedly inserted with a rotating shaft, the shaft wall of the rotating shaft is rotatably connected with the cavity wall of the milling cavity through a first bearing, the first motor (13) is fixedly arranged at the right end of the rear outer side wall of the processing box (9), the output end of the first motor (13) is rotatably connected with the rear end of the shaft wall of the rotating shaft through a, the fixed separation net (17) that is equipped with the slope and sets up in inside right side top in mill powder chamber, the right side wall in mill powder chamber is located the position fixedly connected with U-shaped pipe (18) of separation net (17) top, and the one end that processing box (9) were kept away from in U-shaped pipe (18) runs through the right side wall lower extreme of filter box (3) and extends to inside.

3. The filter mechanism of a plasma spray apparatus according to claim 1, wherein: the driving mechanism comprises a second motor (19), two reciprocating screw rods (20) and two movable blocks (21), the two reciprocating screw rods (20) are respectively arranged at the left side and the right side of the filter screen (4), the rod walls of the two reciprocating screw rods (20) are rotatably connected with the inner side wall of the filter box (3) through second bearings, the rod walls of the two reciprocating screw rods (20) are respectively and slidably connected with screw nuts, one opposite ends of the two movable blocks (21) are respectively and fixedly connected with the side walls at the opposite sides of the two movable boxes (6), the upper ends of the two movable blocks (21) are respectively provided with a fixed hole and fixedly connected with the outer side wall of the screw nut at the same side through the fixed hole, the upper ends of the two reciprocating screw rods (20) are respectively extended to the upper part of the filter box (3), and the end of the rod wall of the two reciprocating screw rods (20) above the filter box (3) is fixedly sleeved with a belt pulley, and two belt pulleys are jointly connected through belt (22) transmission, the upper end rear side fixedly connected with L-shaped piece of filter cartridge (3), and second motor (19) are located the fixed setting of horizontal part lower extreme of L-shaped piece, the output of second motor (19) is connected through the transmission of second shaft coupling and the pole wall upper end of the reciprocal lead screw (20) of corresponding position.

4. The filter mechanism of a plasma spray apparatus according to claim 1, wherein: preheat the mechanism and include annular tube (23) and suction fan (24), a plurality of evenly distributed's of inboard outer pipe wall fixedly connected with bracing piece (25) of annular tube (23), and a plurality of bracing pieces (25) one end in opposite directions all with the lateral wall lower extreme fixed connection of spray gun (2), a plurality of evenly distributed's of lower pipe wall fixedly connected with suction pipe of annular tube (23), the right pipe wall fixedly connected with of annular tube (23) communicating pipe (26), the one end that annular tube (23) were kept away from in communicating pipe (26) runs through the left side wall upper end of working chamber, the ventilation hole has been seted up to the last lateral wall of working chamber, suction fan (24) are located the fixed setting of the last lateral wall of working chamber.

5. The filter mechanism of a plasma spray apparatus according to claim 4, wherein: the powder feeding pipe (5), the gas conveying pipe (12), the return pipe (30) and the communicating pipe (26) are all arranged by hoses.

6. The filter mechanism of a plasma spray apparatus according to claim 1, wherein: equal fixedly connected with L shaped plate (27) in both ends about the right side lateral wall of filter cartridge (3), and the equal threaded connection of the vertical portion lateral wall of two L shaped plates (27) has construction bolt (28), send the left side wall of powder equipment (1) seted up with construction bolt (28) assorted screw hole.

7. The filter mechanism of a plasma spray apparatus according to claim 4, wherein: and a blocking net (29) is fixedly arranged in the ventilation hole.

Technical Field

The invention relates to the technical field of plasma spraying, in particular to a filtering mechanism of plasma spraying equipment.

Background

Plasma spraying is a technology for strengthening and modifying the surface of a material, and can enable the surface of a matrix to have the performances of wear resistance, corrosion resistance, high-temperature oxidation resistance, electric insulation, heat insulation, radiation protection, wear reduction, sealing and the like.

At present, when plasma spraying is carried out, powder materials are fed into a muzzle position of a plasma spraying gun through a powder feeding device, are heated and melted through a plasma arc of a plasma spraying cavity and are sprayed on the surface of a workpiece, because the processing technology of the powder raw materials is different, errors in processing equipment and the like can cause the particle sizes of partial powder raw materials to be larger, the phenomenon of caking of the powder raw materials stored in the powder feeding equipment also exists, the phenomenon of insufficient heating exists when the subsequent plasma spraying gun heats and melts the powder raw materials with larger particle sizes and caking, the spraying quality is seriously influenced, and partial powder raw materials are filtered by additionally arranging a filter screen and the like, but the phenomenon that powder raw materials are embedded into the holes of the filter screen influences the powder feeding efficiency, and the powder feeding efficiency is required to be cleaned frequently and is complicated, so that the filtering mechanism of the plasma spraying equipment is provided.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides a filtering mechanism of plasma spraying equipment, which has the advantages of being capable of filtering powder raw materials, avoiding the powder raw materials with larger particle size, caking and the like from influencing the spraying quality, avoiding the phenomenon that the powder feeding efficiency is influenced by the blockage of a filtering mesh by the raw materials and the like, solving the problems that the particle size of partial powder raw materials is larger due to different processing techniques of the powder raw materials, the caking of the powder raw materials stored in the powder feeding equipment is caused, the phenomenon of insufficient heating exists when a subsequent plasma spraying gun heats and melts the powder raw materials with larger particle size and caking, the spraying quality is seriously influenced, part of the powder raw materials are filtered by additionally arranging a filtering mesh and the like, but the phenomenon that the powder raw materials are embedded into the filtering mesh holes exists, the powder feeding efficiency is influenced, the problem that people need to clean frequently and the cleaning is complex is solved.

(II) technical scheme

In order to realize the purposes of filtering the powder raw materials, avoiding the powder raw materials with larger particle size, caking and the like from influencing the spraying quality and avoiding the phenomenon that the raw materials block the filter meshes to influence the powder feeding efficiency, the invention provides the following technical scheme: a filtering mechanism of plasma spraying equipment comprises powder feeding equipment, a spraying gun and a filtering box, wherein the discharge end of the powder feeding equipment is fixedly connected with the right side wall of the filtering box, a filtering screen is fixedly arranged in the filtering box, the right side wall of the filtering box is fixedly connected with a powder feeding pipe, one end, far away from the filtering box, of the powder feeding pipe is fixedly communicated with the feed end of the spraying gun, the positions, located on the left side and the right side of the filtering screen, of the inner side wall of the filtering box are respectively and slidably connected with a movable box, the filtering box is connected with a driving mechanism and is connected with the two movable boxes through the driving mechanism, a connecting pipe is fixedly arranged in the movable box on the left side, the right side of the pipe wall of the connecting pipe is fixedly connected with a plurality of uniformly distributed air injection heads, the lower end of the filtering box is fixedly connected with a processing box, a partition plate is fixedly arranged in the, the lower side wall of the working cavity is fixedly connected with a high-pressure air pump, the air suction end of the high-pressure air pump penetrates through the left side wall of the working cavity, the output end of the high-pressure air pump is fixedly connected with an air delivery pipe, the right end of the upper side wall of the working cavity is provided with a sliding hole matched with the air delivery pipe, one end of the gas pipe far away from the high-pressure air pump penetrates through the sliding hole and penetrates through the lower end of the movable box on the left side to be fixedly communicated with the lower pipe wall of the connecting pipe, the lower end of the movable box on the right side is fixedly connected with a return pipe, a blanking hole is arranged at the left end of the upper side wall of the grinding cavity, a fixed block is fixedly connected at the upper end of the left side wall of the grinding cavity, the lower end of the return pipe passes through the blanking hole and penetrates through the upper end of the fixed block to extend to the lower part of the fixed block, the inside in mill powder chamber is equipped with crocus mechanism, it is connected with preheating mechanism and is connected with the spray gun through preheating mechanism to handle the box.

Preferably, the powder grinding mechanism comprises a first motor, a powder grinding base and an arc-shaped powder grinding roller, the lower end of the powder grinding base is fixedly connected with the lower side wall of the powder grinding cavity, the left side wall and the right side wall of the powder grinding cavity are fixedly connected with obliquely arranged baffles, the lower ends of the two baffles are respectively fixedly connected with the upper ends of the left side wall and the right side wall of the powder grinding base, the arc-shaped powder grinding roller is arranged above the powder grinding base, an arc-shaped powder grinding groove matched with the arc-shaped powder grinding roller is formed in the upper end of the powder grinding base, a rotating shaft is fixedly inserted into the side wall of the arc-shaped powder grinding roller, the shaft wall of the rotating shaft is rotatably connected with the cavity wall of the powder grinding cavity through a first bearing, the right end of the rear outer side wall of the processing box of the first motor is fixedly arranged, the output end of the first motor is rotatably connected with the rear end of the, the right side wall in the powder grinding chamber is located the position fixedly connected with U-shaped pipe above the separation net, and the U-shaped pipe is kept away from the one end of handling the box and is run through the right side wall lower extreme of filter box and extend to inside.

Preferably, the driving mechanism comprises a second motor, two reciprocating screw rods and two movable blocks, the two reciprocating screw rods are respectively arranged at the left side and the right side of the filter screen, rod walls of the two reciprocating screw rods are rotatably connected with the inner side wall of the filter box through second bearings, rod walls of the two reciprocating screw rods are respectively and slidably connected with screw nuts, opposite ends of the two movable blocks are respectively and fixedly connected with the side walls of the opposite sides of the two movable boxes, the upper ends of the two movable blocks are respectively provided with a fixed hole and fixedly connected with the outer side wall of the screw nut at the same side through the fixed hole, the upper ends of the two reciprocating screw rods extend to the upper part of the filter box, belt pulleys are fixedly sleeved at the ends of the rod walls of the two reciprocating screw rods above the filter box, the two belt pulleys are jointly connected through belt transmission, and an L-shaped block is fixedly connected with the rear side of the, and the second motor is fixedly arranged at the lower end of the horizontal part of the L-shaped block, and the output end of the second motor is in transmission connection with the upper end of the rod wall of the reciprocating screw rod at the corresponding position through a second coupler.

Preferably, preheat the mechanism and include annular duct and suction fan, a plurality of evenly distributed's of inboard outer pipe wall fixedly connected with bracing piece of annular duct, and the one end in opposite directions of a plurality of bracing pieces all with the lateral wall lower extreme fixed connection of spray gun, a plurality of evenly distributed's of lower pipe wall fixedly connected with suction pipe of annular duct, the right pipe wall fixedly connected with communicating pipe of annular duct, the one end of keeping away from the annular duct communicating pipe runs through the left side wall upper end of working chamber, the ventilation hole has been seted up to the last side wall of working chamber, the suction fan is located the fixed setting of last side wall of working chamber.

Preferably, the powder feeding pipe, the gas pipe, the return pipe and the communicating pipe are all arranged by hoses.

Preferably, the upper end and the lower end of the right outer side wall of the filter box are fixedly connected with L-shaped plates, the side walls of the vertical parts of the two L-shaped plates are in threaded connection with mounting bolts, and threaded holes matched with the mounting bolts are formed in the left side wall of the powder feeding equipment.

Preferably, a blocking net is fixedly arranged inside the vent hole.

(III) advantageous effects

Compared with the prior art, the invention provides a filtering mechanism of plasma spraying equipment, which has the following beneficial effects:

1. this plasma spraying equipment's filter mechanism, powder feeding equipment through being equipped with, can send powder work, mutually support through filter cartridge and the filter screen that is equipped with, can carry out filtration treatment to the powder when sending the powder, the phenomenon that the raw materials that do not conform to the particle diameter lead to follow-up spraying quality variation has effectively been avoided, mutually support through sending powder pipe and spray gun that is equipped with, can send the spray gun with the powder after filtering, spraying work has been carried out, through two activity boxes that are equipped with, handle the box, a separator, high compression pump, the gas-supply pipe, the connecting pipe, mutually supporting of a plurality of jet heads and back flow, can spray high-pressure draught to filter mesh hole, thereby can be with the raw materials blowout of jam, avoid the filter screen to be blockked up to influence and send powder efficiency, simultaneously can be with the raw materials that do not conform to the particle diameter in the back.

2. This plasma spraying equipment's filtering mechanism, crocus mechanism through being equipped with, can carry out crocus processing again to the raw materials that is not conform to the particle diameter requirement that flows back in the crocus intracavity, and in flowing back qualified powder behind the crocus again in the filter box, avoid unqualified raw materials to pile up and cause the waste, actuating mechanism through being equipped with, can drive two movable box at vertical direction reciprocating motion, thereby can last prevent blockking up work to the filter screen, through the preheating mechanism that is equipped with, on the one hand can cool off the position after the spraying, heat when on the other hand can utilize cooling carries out preheating treatment to the raw materials in the filter box, guarantee subsequent heating melting's the degree of filling, it is extravagant to reduce heat energy.

Drawings

FIG. 1 is a schematic structural diagram of a filter mechanism of a plasma spraying apparatus according to the present invention;

FIG. 2 is a schematic side view of the milling mechanism of FIG. 1 according to the present invention;

FIG. 3 is a schematic side view of the filter screen of FIG. 1 according to the present invention;

FIG. 4 is a schematic bottom view of the ring tube of FIG. 1 according to the present invention;

fig. 5 is a schematic top view of the connection tube shown in fig. 1 according to the present invention.

In the figure: 1 send whitewashed equipment, 2 spray guns, 3 filter cartridges, 4 filter screens, 5 send whitewashed pipes, 6 activity boxes, 7 connecting pipes, 8 air jets, 9 processing box, 10 baffles, 11 high compression pump, 12 gas-supply pipes, 13 first motor, 14 crocus bases, 15 arc crocus roller, 16 baffles, 17 separation net, 18U-shaped pipe, 19 second motor, 20 reciprocal lead screw, 21 movable block, 22 belts, 23 ring pipes, 24 suction fan, 25 bracing pieces, 26 communicating pipes, 27L shaped plate, 28 construction bolts, 29 fender net, 30 back flow.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-5, a filter mechanism of a plasma spraying device comprises a powder feeding device 1, a spraying gun 2 and a filter box 3, wherein a discharge end of the powder feeding device 1 is fixedly connected with a right side wall of the filter box 3, a filter screen 4 is fixedly arranged inside the filter box 3, a powder feeding pipe 5 is fixedly connected with the right side wall of the filter box 3, one end of the powder feeding pipe 5 far away from the filter box 3 is fixedly communicated with a feed end of the spraying gun 2, movable boxes 6 are slidably connected with positions of the inner side wall of the filter box 3, which are positioned at the left and right sides of the filter screen 4, the filter box 3 is connected with a driving mechanism and is connected with the two movable boxes 6 through the driving mechanism, a connecting pipe 7 is fixedly arranged inside the movable box 6 at the left side, a plurality of uniformly distributed air nozzles 8 are fixedly connected with the right side of the connecting pipe 7, a processing box 9 is fixedly connected with the lower end of the filter box 3, a partition plate 10 is fixedly arranged inside the processing box, the lower lateral wall fixedly connected with high compression pump 11 of working chamber, the end of breathing in of high compression pump 11 runs through the left side wall of working chamber, high compression pump 11's output fixedly connected with gas-supply pipe 12, the last lateral wall right-hand member of working chamber has seted up with gas-supply pipe 12 assorted slide opening, the one end that high compression pump 11 was kept away from to gas-supply pipe 12 passes the slide opening and runs through the fixed intercommunication of the lower tube wall of 6 lower extremes of left activity box and connecting pipe 7, the lower extreme fixedly connected with back flow 30 that is located right side activity box 6, the blanking hole has been seted up to the last lateral wall left end in grinding chamber, the left side wall upper end fixedly connected with fixed block in grinding chamber, and the lower extreme of back flow 30 passes the blanking hole and runs through the upper end of fixed block and extends to the below setting of fixed block, the inside in grinding chamber is equipped with crocus mechanism.

The milling mechanism comprises a first motor 13, a milling base 14 and an arc milling roller 15, the lower end of the milling base 14 is fixedly connected with the lower side wall of a milling cavity, the left side wall and the right side wall of the milling cavity are fixedly connected with baffle plates 16 which are obliquely arranged, the lower ends of the two baffle plates 16 are respectively fixedly connected with the upper ends of the left side wall and the right side wall of the milling base 14, the arc milling roller 15 is arranged above the milling base 14, the upper end of the milling base 14 is provided with an arc milling groove matched with the arc milling roller 15, the side wall of the arc milling roller 15 is fixedly inserted with a rotating shaft, the shaft wall of the rotating shaft is rotatably connected with the cavity wall of the milling cavity through a first bearing, the first motor 13 is fixedly arranged at the right end of the rear outer side wall of the processing box 9, the output end of the first motor 13 is rotatably connected with the rear end of the shaft wall of the rotating shaft through a first coupler, the right side wall in powder grinding chamber is located the position fixedly connected with U-shaped pipe 18 of separation net 17 top, and the U-shaped pipe 18 is kept away from the one end of handling box 9 and is run through the right side wall lower extreme of filter box 3 and extend to inside, unqualified raw materials get into the inside in powder grinding chamber through back flow 30 and blanking hole, the upper end that can fall at crocus base 14 is blockked through baffle 16, first motor 13 work, can make the pivot rotate, thereby can make arc crocus roller 15 rotate, and then can carry out crocus processing again to the powder of crocus base 14 top, powder behind the crocus again is through U-shaped pipe 18 after the filtration of separation net 17 inside filter box 3 that flows back, avoid unqualified raw materials to pile up the waste.

The driving mechanism comprises a second motor 19, two reciprocating screw rods 20 and two movable blocks 21, the two reciprocating screw rods 20 are respectively arranged at the left side and the right side of the filter screen 4, the rod walls of the two reciprocating screw rods 20 are rotatably connected with the inner side wall of the filter box 3 through second bearings, the rod walls of the two reciprocating screw rods 20 are respectively connected with screw nuts in a sliding manner, the opposite ends of the two movable blocks 21 are respectively fixedly connected with the side walls at the opposite sides of the two movable boxes 6, the upper ends of the two movable blocks 21 are respectively provided with a fixed hole and are fixedly connected with the outer side wall of the screw nut at the same side through the fixed hole, the upper ends of the two reciprocating screw rods 20 extend to the upper part of the filter box 3, belt pulleys are fixedly sleeved at the ends of the rod walls of the two reciprocating screw rods 20 above the filter box 3, the two belt pulleys are jointly connected through a belt 22 in a transmission manner, and the second motor 19 is located the fixed setting of the horizontal part lower extreme of L-shaped piece, the output of second motor 19 passes through the second shaft coupling and is connected with the pole wall upper end transmission of the reciprocal lead screw 20 of corresponding position, the work of second motor 19 can make one of them reciprocal lead screw 20 rotate, under the cooperation of two belt pulleys with belt 22, can make two reciprocal lead screws 20 rotate simultaneously, thereby can make two movable blocks 21 do reciprocating motion in vertical direction, and then can drive two movable boxes 6 at vertical direction reciprocating motion, in order to carry out the continuous anti-blocking work to filter screen 4.

The preheating mechanism comprises a ring-shaped pipe 23 and a suction fan 24, the outer pipe wall of the inner side of the ring-shaped pipe 23 is fixedly connected with a plurality of uniformly distributed supporting rods 25, the opposite ends of the plurality of supporting rods 25 are fixedly connected with the lower end of the outer side wall of the spraying gun 2, the lower pipe wall of the ring-shaped pipe 23 is fixedly connected with a plurality of uniformly distributed suction pipes, the right pipe wall of the ring-shaped pipe 23 is fixedly connected with a communicating pipe 26, one end of the communicating pipe 26, far away from the ring-shaped pipe 23, penetrates through the upper end of the left side wall of the working chamber, the upper side wall of the working chamber is provided with a ventilation hole, the suction fan 24 is fixedly arranged on the upper side wall of the working chamber, the suction fan 24 works, the plurality of suction pipes can generate suction through the ring-shaped pipe 23 and the communicating pipe 26, so that the positions after spraying can be cooled, the cooling efficiency, improving the filling degree of subsequent heating and melting.

The powder feeding pipe 5, the gas pipe 12, the return pipe 30 and the communicating pipe 26 are all arranged by hoses, so that the smooth operation of the device can be ensured.

Equal fixedly connected with L shaped plate 27 in both ends about the right side lateral wall of filter cartridge 3, and the equal threaded connection of the vertical portion lateral wall of two L shaped plates 27 has construction bolt 28, send powder equipment 1's left side wall seted up with construction bolt 28 assorted screw hole, can improve the support stability of sending powder equipment 1 to filter cartridge 3.

The fixed fender net 29 that is equipped with in inside of ventilation hole can avoid the raw materials to spill from a plurality of aspiration channels through the ventilation hole.

To sum up, this plasma spraying equipment's filtering mechanism, in using, air supply equipment 1 work, can send the powder into inside filter cartridge 3, can filter the powder through filter screen 4, the powder after the filtration gets into inside spray gun 2 through blast pipe 5, high compression pump 11 work, can make a plurality of air jet head departments produce high-pressure draught through gas-supply pipe 12 and connecting pipe 7, thereby can blow the raw materials of embedding filter screen 4 downthehole portions, make it break away from filter screen 4 and get into the powder intracavity portion of grinding through activity box 6 and back flow 30 on right side, effectively avoided not conforming to the raw materials of particle diameter to lead to the phenomenon of follow-up spraying quality variation, and avoid the filter screen to be blockked up the influence and send whitewashed efficiency.

It is to be noted that the term "comprises," "comprising," or any other variation thereof is intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.