CN216192708U - Cold spraying powder conveying device - Google Patents
Cold spraying powder conveying device Download PDFInfo
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- CN216192708U CN216192708U CN202122224206.0U CN202122224206U CN216192708U CN 216192708 U CN216192708 U CN 216192708U CN 202122224206 U CN202122224206 U CN 202122224206U CN 216192708 U CN216192708 U CN 216192708U
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Abstract
The utility model relates to a cold-spraying aluminum powder supplementing device, which comprises a storage bin, a powder feeder and a powder supplementing mechanism, wherein the storage bin is communicated with the powder feeder through a balance air pipe and has a volume which is much larger than that of the powder feeder, the powder feeder is provided with a powder supplementing signal generating assembly, and the powder supplementing mechanism is arranged between the storage bin and the powder feeder and is used for timely supplementing powder in the storage bin to the powder feeder according to a signal of the powder supplementing signal generating assembly so as to prolong the continuous working time of cold spraying equipment. The utility model can greatly prolong the continuous working time of the cold spraying equipment, on one hand, the production efficiency is improved, on the other hand, the energy consumption is reduced, and the service life of the equipment is prolonged.
Description
Technical Field
The utility model belongs to the field of cold spraying equipment, and particularly relates to a cold spraying powder conveying device.
Background
Cold spraying is a new and advanced surface coating technology developed from thermal spraying technology. The cold spraying is based on the aerodynamic and high-speed collision dynamics principle, firstly, high-pressure gas is introduced into a contraction-expansion Laval nozzle, supersonic flow is generated after the gas flows through the throat part of the nozzle, then powder conveying gas is used for conveying spraying powder into airflow from the upstream of the nozzle along the axial direction, powder particles are accelerated to the high speed of more than 300-1200 m/s through the whole nozzle to form high-speed particle flow, and the high-speed particle flow collides with a substrate to generate severe plastic deformation so as to deposit and form a coating. In the process, the working gas is usually preheated, and the temperature is generally 100-800 ℃ according to different spraying materials, but is far lower than the melting point of the spraying materials. Because the spraying process adopts relatively low temperature, adverse effects such as oxidation (aiming at metal materials), phase change, decomposition, chemical reaction, grain growth (aiming at nano-structure materials) and the like in the thermal spraying process can be avoided. At present, cold spray technology has been successfully used to prepare most pure metals, alloys, metal matrix composites, nanostructured metal coatings or blocks, and the like.
The powder feeder capacity of cold spraying devices is usually relatively small (not more than 10 kg) and therefore can be used for a limited time (usually not more than 2 hours, depending on the powder density). And the working pressure of the cold spraying device is usually between 3.5 and 6MPa, and the pressure is very high. For safety reasons, the powder feed to the powder feeder is usually carried out in a shut-down state. The temperature is required to be reduced from the working temperature (generally above 500 ℃) to below 100 ℃ every time the powder adding is stopped, which probably needs 10 minutes, and meanwhile, the temperature is increased to the working temperature after the powder adding is finished and also needs about 10 minutes, so that the whole powder adding process probably needs about 30 minutes, the production continuity is poor, and the working efficiency is low; meanwhile, the temperature is frequently increased and decreased, so that the aging of the heating pipe is easily aggravated to influence the service life, and the energy waste is serious to cause high energy consumption.
Disclosure of Invention
The utility model aims to provide a cold spraying powder conveying device to solve the problems. Therefore, the utility model adopts the following specific technical scheme:
according to the embodiment of the utility model, the cold spraying powder conveying device comprises a storage bin, a powder feeder and a powder supplementing mechanism, wherein the storage bin is communicated with the powder feeder through a balance air pipe and has a volume which is much larger than that of the powder feeder, the powder feeder is provided with a powder supplementing signal generating assembly, and the powder supplementing mechanism is arranged between the storage bin and the powder feeder and is used for timely supplementing powder in the storage bin to the powder feeder according to a signal of the powder supplementing signal generating assembly so as to prolong the continuous working time of the cold spraying device.
Furthermore, the powder supplementing signal generating assembly comprises a low material level electrode and a high material level electrode, and when the powder in the powder feeder is lower than the low material level electrode and the high material level electrode, the low material level electrode and the high material level electrode are not conducted with the shell of the powder feeder; and when the powder in the powder feeder is higher than the low material level electrode and the high material level electrode, the low material level electrode and the high material level electrode are communicated with the shell of the powder feeder.
Further, the powder supplementing mechanism is a screw conveyer.
Further, the auger of the screw conveyer penetrates through the bottom of the storage bin and extends into the feeding hole of the powder feeder.
Furthermore, the inner cavity at the bottom of the storage bin is tapered from top to bottom at the two radial side parts of the packing auger.
Further, the screw conveyer is connected with the storage bin and the powder feeder in a sealing mode through flange surfaces.
Further, a non-return sleeve is sleeved between the packing auger and the discharge hole of the storage bin.
Further, still be equipped with buffering unloading subassembly in the feed bin, buffering unloading subassembly includes a plurality of crisscross spaced chute boards from top to bottom, and two are adjacent chute board mirror symmetry distributes, chute board's upper end is semi-circular, the lower extreme be with the coplanar straight line of semi-circular diameter.
Furthermore, buffering unloading subassembly below still is equipped with an isosceles triangle's dispersion board, the dispersion board is located directly over the auger and with the extending direction of auger is unanimous.
Further, the volume of the storage bin is more than 10 times of the volume of the powder feeder.
By adopting the technical scheme, the utility model has the beneficial effects that: the continuous working time of the cold spraying equipment can be greatly prolonged, on one hand, the production efficiency is improved, on the other hand, the energy consumption is reduced, and the service life of the equipment is prolonged.
Drawings
To further illustrate the various embodiments, the utility model provides the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments of the utility model and, together with the description, serve to explain the principles of the embodiments. Those skilled in the art will appreciate still other possible embodiments and advantages of the present invention with reference to these figures. Elements in the figures are not drawn to scale and like reference numerals are generally used to indicate like elements.
FIG. 1 is a perspective view of a cold spray powder delivery apparatus according to an embodiment of the utility model;
fig. 2 is another perspective view of the cold spray powder delivery apparatus shown in fig. 1 with the steel structure removed.
FIG. 3 is a cross-sectional view of the cold spray powder delivery apparatus shown in FIG. 2;
FIG. 4 is an exploded view of the powder replenishment mechanism of the cold spray powder delivery apparatus shown in FIG. 2;
FIG. 5 is a perspective view of the outlet tube of the powder replenishing mechanism shown in FIG. 4;
FIG. 6 is an exploded view of the bin of the cold spray breading unit shown in FIG. 1;
figure 7 is a perspective view of the bottom of the cartridge shown in figure 6.
Detailed Description
The utility model will now be further described with reference to the accompanying drawings and detailed description.
As shown in fig. 1 and 2, a cold spray powder feeder includes a hopper 1, a powder feeder 2, and a powder replenishing mechanism 3. The silo 1, the powder feeder 2 and the powder replenishing mechanism 3 are usually mounted on a steel structure 4. The bin 1 is communicated with the powder feeder 2 through a balance air pipe 5, so that the air pressure between the bin and the powder feeder is the same. The silo 1 typically has a much larger volume than the powder feeder 2, for example more than 10 times. The powder feeder 2 is provided with a powder supplementing signal generating assembly which is used for generating a powder supplementing signal and a powder supplementing stopping signal. The powder supplementing mechanism 3 is arranged between the stock bin 1 and the powder feeder 2 and used for supplementing powder in the stock bin 1 into the powder feeder 2 in time according to a powder supplementing signal of the powder supplementing signal generating assembly so as to prolong the continuous working time of the cold spraying equipment. Specifically, when the powder supplementing signal generating assembly generates the powder supplementing signal, the powder supplementing mechanism 3 operates to convey the powder in the bin 1 to the powder feeder 2, and the operation is stopped until the powder supplementing signal generating assembly generates the powder supplementing stopping signal.
In this embodiment, the powder supplement signal generating assembly may include a low level electrode 61 and a high level electrode 62, and the low level electrode 61 and the high level electrode 62 are installed at the low level and the high level of the powder feeder 2 through insulating sealing rings. When the powder in the powder feeder 2 is lower than the low material level electrode 61 and the high material level electrode 62, the low material level electrode 61 and the high material level electrode 62 are not conducted with the shell of the powder feeder 2, and a powder supplement signal is generated at the moment; when the powder in the powder feeder 2 is higher than the low material level electrode 61 and the high material level electrode 62, the low material level electrode 61 and the high material level electrode 62 are conducted with the shell of the powder feeder 2, and a powder supplementing stopping signal is generated at the moment. The signal generation mode of the powder supplementing signal generation assembly is very reliable, low in cost and convenient to install.
It should be understood that the powder supplementing signal generating component can also adopt a weighing sensor, and when the weight of the powder in the powder feeder measured by the weighing sensor is less than a low preset value, the powder supplementing signal is generated; and when the weight of the powder in the powder feeder measured by the weighing sensor is greater than a high preset value, generating a powder supplementing stopping signal.
In this embodiment, the powder replenishing mechanism 3 is a screw conveyor. Specifically, as shown in fig. 2 to 5, the powder replenishing mechanism (i.e., screw conveyor) 3 may include a motor 31, an auger 32, a first connecting pipe 33, a second connecting pipe 34, an outlet pipe 35, and the like, the motor 31 is fixedly installed on the steel structure 4, one end of the first connecting pipe 33 is hermetically connected to the output shaft of the motor 31, the other end is hermetically connected to the bin 1, one end of the second connecting pipe 34 is hermetically connected to the bin, the other end is hermetically connected to the feed port 21 of the powder feeder 2, the outlet pipe 35 is inserted into an end of the second connecting pipe 34 and has a downward opening 351 and a bearing mount 352 at the end, the auger 32 is connected to the feed shaft of the motor 31 and sequentially passes through the first connecting pipe 33, the bottom 11 of the bin 1, the second connecting pipe 34, and the outlet pipe 35 and is mounted to the bearing mount 352 through a bearing 36, so that the auger 32 can achieve spiral feeding. A plurality of sets of sealing rings 37 are installed in the first connection pipe 33 to achieve high-pressure sealing. The first connecting pipe 33 and the second connecting pipe 34 are connected with the silo 1 and the powder feeder 2 in a sealing way through flange surfaces, so that the device can work under high pressure. The auger 32, the first connecting pipe 33, the second connecting pipe 34 and the outlet pipe 35 may be made of stainless steel.
Preferably, a non-return sleeve 38 is inserted into one end of the second connection pipe 34 connected to the silo 1, and the non-return sleeve 38 is used for ensuring that the materials do not return during the transportation process. The inner diameter of the non-return sleeve 38 is slightly larger than the outer diameter of the auger 32. Auger 32 extends through non-return sleeve 38. The non-return sleeve 38 is made of a wear resistant material.
In the present embodiment, as shown in fig. 3, 6 and 7, the cartridge 1 includes a bottom 11, a cylinder 12, a sealing flange 13, a top cover 14, and the like. Wherein, the upper and lower both ends of barrel 12 are fixed together with sealing flange 13 and bottom 11 through threaded connection respectively, and top cap 14 passes through the bolt fastening with sealing flange 13. The barrel 12 is generally made of a stainless steel plate having a certain thickness so as to be able to withstand high pressure (i.e., working pressure of the cold spray device). Preferably, the inner cavity of the bottom 11 tapers from top to bottom at the two radial side parts of the packing auger 32, specifically, the inner cavity of the bottom 11 tapers from the circular shape at the upper end to the packing auger mounting groove 111, the length of the packing auger mounting groove 111 is equal to the inner diameter of the cylinder, and the width is larger than the outer diameter of the packing auger 32. This configuration of the base 11 can reduce the rotational resistance of the auger 32, reduce the motor load, and can improve the conveying efficiency.
In addition, a buffer blanking assembly 15 is provided in the silo 1, said buffer blanking assembly 15 comprising a cage-like mounting frame 151 and a plurality (3 shown) of chute plates 152. The cage-like mounting frame 151 may be formed by welding stainless steel strips. The chute plate 152 may be machined from stainless steel plate. The chute plates 152 are fixed (e.g. welded) to the cage-like mounting frame 151 in staggered spaced relation one above the other, with two adjacent chute plates 152 being arranged in mirror symmetry. The chute plate 152 has a semicircular upper end and a linear lower end coplanar with the diameter of the semicircle. Through buffering unloading subassembly 15, can avoid the powder compaction, cause the increase of auger rotation resistance. Preferably, an isosceles triangle dispersion plate 16 is further arranged below the buffering blanking assembly 15, and the dispersion plate 16 is located right above the packing auger 32 and is consistent with the extending direction of the packing auger 32. The powder falling from the chute board 152 of the buffering blanking assembly 15 falls onto the packing auger 32 after being dispersed by the dispersion board 16, namely, the powder pressed on the packing auger 32 is less, so that the rotation resistance of the packing auger 32 can be further reduced, and the power consumption of the motor 31 is reduced.
As shown in fig. 1, in order to facilitate charging of the storage bin 1, the steel structure 4 is further provided with a lifting operation platform 7, and the lifting operation platform 7 may include a lifting motor 71, a screw rod 72, an operation platform 73, two guide posts 74, two pulleys 75, and the like. The lifting motor 71 is in driving connection with an operating platform 73 through a screw 72, the operating platform 73 is mounted on a guide post 74 through a corresponding linear bearing, and a pulley 75 is fixed on the operating platform 73 and is in sliding contact with the upright of the steel structure 4. The operation table 7 can be lifted and lowered smoothly by the lifting motor 71.
The working principle of the cold spray powder feeding device of the present invention will be briefly described below. Firstly, the material bin 1 and the powder feeder 2 are filled with required powder, then cold spraying equipment is started to carry out spraying operation, when the material level in the powder feeder 2 is lowered to be below a low material level electrode 61, a powder supplementing signal is sent at the moment, the spiral conveyer 3 is started to supplement the powder in the material bin 1 into the powder feeder 2, when the material level in the powder feeder 2 is supplemented to be above a high material level electrode 62, a powder supplementing stopping signal is sent at the moment, the spiral conveyer 3 stops, and the steps are repeated until the workpieces are completely sprayed or the powder in the material bin 1 and the powder feeder 2 is used up. The powder feeder 2 is supplemented with powder on line through the large-capacity storage bin 1, so that the continuous working time of cold spraying equipment can be greatly prolonged, on one hand, the production efficiency is improved, on the other hand, the energy consumption is reduced, and the service life of the equipment is prolonged.
While the utility model has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the utility model as defined by the appended claims.
Claims (9)
1. The cold spraying powder conveying device is characterized by comprising a storage bin, a powder feeder and a powder supplementing mechanism, wherein the storage bin is communicated with the powder feeder through a balance air pipe, the volume of the storage bin is more than 10 times of the volume of the powder feeder, the powder feeder is provided with a powder supplementing signal generating assembly, and the powder supplementing mechanism is installed between the storage bin and the powder feeder and used for timely supplementing powder in the storage bin to the powder feeder according to the signal of the powder supplementing signal generating assembly so as to prolong the continuous working time of cold spraying equipment.
2. The cold spray powder delivery device of claim 1, wherein the powder replenishment signal generating assembly comprises a low level electrode and a high level electrode, the low level electrode and the high level electrode being non-conductive with a housing of the powder feeder when powder in the powder feeder is lower than the low level electrode and the high level electrode; and when the powder in the powder feeder is higher than the low material level electrode and the high material level electrode, the low material level electrode and the high material level electrode are communicated with the shell of the powder feeder.
3. The cold spray dusting apparatus of claim 1, wherein the fines replenishment mechanism is a screw conveyor.
4. The cold spray powder feeder of claim 3, wherein the auger of the screw conveyor extends through the bottom of the bin into the feed inlet of the powder feeder.
5. The cold powder blasting device of claim 4, wherein the inner cavity of the bottom of the bin is tapered from top to bottom at the two radial sides of the auger.
6. The cold spray powder feeder of claim 4, wherein the screw conveyor is sealingly connected to the silo and the powder feeder by a flange surface.
7. The cold spray powder conveying device of claim 4, wherein a non-return sleeve is sleeved between the auger and the discharge port of the storage bin.
8. The cold spray powder conveying device according to claim 4, wherein a buffer blanking assembly is further arranged in the storage bin, the buffer blanking assembly comprises a plurality of chute plates which are staggered up and down and spaced, two adjacent chute plates are distributed in a mirror symmetry mode, the upper ends of the chute plates are semicircular, and the lower ends of the chute plates are straight lines coplanar with the diameters of the semicircular plates.
9. The cold spray powder delivery device of claim 8, wherein an isosceles triangle dispersion plate is further disposed below the buffering and blanking assembly, and the dispersion plate is located right above the auger and is aligned with the extension direction of the auger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122224206.0U CN216192708U (en) | 2021-09-14 | 2021-09-14 | Cold spraying powder conveying device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122224206.0U CN216192708U (en) | 2021-09-14 | 2021-09-14 | Cold spraying powder conveying device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216192708U true CN216192708U (en) | 2022-04-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122224206.0U Active CN216192708U (en) | 2021-09-14 | 2021-09-14 | Cold spraying powder conveying device |
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| CN (1) | CN216192708U (en) |
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2021
- 2021-09-14 CN CN202122224206.0U patent/CN216192708U/en active Active
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