CN210474369U - Cooling device of cold spray gun - Google Patents
Cooling device of cold spray gun Download PDFInfo
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- CN210474369U CN210474369U CN201921000059.5U CN201921000059U CN210474369U CN 210474369 U CN210474369 U CN 210474369U CN 201921000059 U CN201921000059 U CN 201921000059U CN 210474369 U CN210474369 U CN 210474369U
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Abstract
The utility model relates to a cooling device of cold spray gun, the cold spray gun includes air chamber, intake pipe, send powder core subassembly and cold spray pipe subassembly, the air chamber has the air inlet, advances powder mouth and export, the intake pipe passes through the air inlet inserts in the air chamber, send powder core subassembly to pass through advance the powder mouth and insert in the air chamber, the cold spray pipe subassembly is installed in the export of air chamber, cooling device includes first cooling unit and second cooling unit, first cooling unit is used for cooling sending powder core subassembly, the second cooling unit be used for right the spray pipe subassembly cools off, first cooling unit with second cooling unit establishes ties. The first cooling unit and the second cooling unit which are connected in series are arranged, so that the Laval spray pipe can be made of materials which are low in cost and easy to process, and the cost of a cold spray gun is reduced; on the other hand, the service life of the cold spray gun can be prolonged.
Description
Technical Field
The utility model relates to a cold spraying equipment specifically relates to a cooling device of cold spray gun.
Background
Cold spraying is a new and advanced surface coating technique developed from thermal spraying. 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 techniques have been successfully used to prepare most pure metals, alloys, metal matrix composites, nanostructured metal coatings or blocks, and the like.
The cold spraying temperature is high, so that the requirement on the material of a Laval spray pipe in the cold spray gun is high, the production cost is high, a sealing ring in the cold spray gun is easy to damage, the service life is short, the continuity of the spraying process is influenced, and the material waste is caused.
Disclosure of Invention
The utility model aims at providing a cooling device of cold spray gun to solve above-mentioned technical problem. Therefore, the utility model discloses a specific technical scheme as follows:
the utility model provides a cooling device of cold spray gun, cold spray gun includes air chamber, intake pipe, send powder core subassembly and cold spray pipe subassembly, the air chamber has the air inlet, advances powder mouth and export, the intake pipe passes through the air inlet inserts in the air chamber, send powder core subassembly to pass through advance the powder mouth and insert in the air chamber, the cold spray pipe subassembly is installed in the export of air chamber, a serial communication port, cooling device includes first cooling unit and second cooling unit, first cooling unit is used for cooling sending powder core subassembly, the second cooling unit is used for right the spray pipe subassembly cools off, first cooling unit with second cooling unit establishes ties.
Further, the specific structure of the first cooling unit is as follows: send powder core subassembly to establish including sending the powder core and cover send the powder core sleeve pipe on the powder core, send the powder core sleeve pipe to be equipped with the cooling water sleeve on corresponding to the entrance point position of sending the powder core, be equipped with radial opposition's water inlet and delivery port on the telescopic lateral wall of cooling water, the water inlet is used for connecting the cooling water source.
Further, the second cooling unit has a specific structure that: the cold spray pipe assembly comprises a spray pipe seat, an inner spray pipe, an outer sleeve and a cooling water return pipe, wherein the spray pipe seat is provided with a water inlet channel and a water outlet channel, the inner spray pipe and the outer sleeve form a cooling water channel, one end of the water inlet channel is communicated with a water outlet of the cooling water sleeve, the other end of the water inlet channel is communicated with the cooling water channel, the cooling water return pipe is arranged beside the outer sleeve side by side, the lower end of the cooling water return pipe is communicated with the cooling water channel, and the upper end of the cooling water return pipe is communicated
Furthermore, the second cooling unit has a specific structure that: the cold spray pipe assembly comprises a spray head pipe seat, an inner spray pipe, an outer sleeve and a cooling water return pipe, wherein the spray head pipe seat is provided with a water inlet channel and a water outlet channel, a cooling water channel is formed between the inner spray pipe and the outer sleeve, one end of the water inlet channel is communicated with a water outlet of the cooling water sleeve, the other end of the water inlet channel is communicated with the cooling water channel, the lower end of the cooling water channel is communicated with the cooling water channel, and the upper end of the cooling water channel is communicated with the water outlet channel.
Further, the inner spray pipe comprises an upper inner spray pipe section and a lower inner spray pipe section which are butted together, the inner diameter of the upper inner spray pipe section is gradually reduced from top to bottom, and the inner diameter of the lower inner spray pipe section is gradually increased from top to bottom.
Further, the inner nozzle is made of high temperature plastic such as polyimide or stainless steel.
Further, the cooling water source is tap water.
The utility model adopts the above technical scheme, the beneficial effect who has is: the first cooling unit and the second cooling unit which are connected in series are arranged, so that the Laval spray pipe can be made of materials which are low in cost and easy to process, and the cost of a cold spray gun is reduced; on the other hand, the service life of the cold spray gun can be prolonged.
Drawings
To further illustrate the embodiments, the present invention provides the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the embodiments. With these references, one of ordinary skill in the art will appreciate other possible embodiments and advantages of the present invention. Elements in the figures are not drawn to scale and like reference numerals are generally used to indicate like elements.
Fig. 1 is a schematic view of a cold spray gun with a cooling device according to a first embodiment of the invention;
FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;
fig. 3 is an enlarged view at B of fig. 2;
fig. 4 is a schematic view of a cold spray gun with a cooling device according to a second embodiment of the present invention;
FIG. 5 is a cross-sectional view taken along line A-A of FIG. 4;
fig. 6 is an enlarged view at B of fig. 5.
Detailed Description
The present invention will now be further described with reference to the accompanying drawings and detailed description.
The first embodiment:
as shown in fig. 1 to 3, a cooling device for a cold spray gun is described. Wherein, the cold spray gun comprises an air chamber 1, an air inlet pipe 2, a powder feeding core assembly 3 and a cold spray pipe assembly 4. The air chamber 1 has an air inlet, a powder inlet and an outlet. The gas inlet pipe 2 is inserted into the gas chamber 1 through the gas inlet port to deliver high-pressure and high-temperature gas into the gas chamber 1. The powder feeding core assembly 3 is inserted into the air chamber 1 through the powder inlet to feed the powder into the air chamber 1. The cold spray pipe assembly 3 is installed on the outlet of the air chamber 1 to spray the powder air flow onto the surface to be sprayed at a high speed, thereby realizing cold spraying. The cooling device may include a first cooling unit and a second cooling unit. The first cooling unit is used for cooling the powder feeding core assembly 3, the second cooling unit is used for cooling the spray pipe assembly, and the first cooling unit and the second cooling unit are connected in series. Namely, the water outlet of the first cooling unit is communicated with the water inlet of the second cooling unit.
In this embodiment, the specific structure of the first cooling unit is as follows: the powder feeding core assembly 3 may comprise a powder feeding core 31 and a powder feeding core sleeve 32 sleeved on the powder feeding core 31. A cooling water sleeve 33 is arranged at the inlet end position of the powder feeding core sleeve 32 corresponding to the powder feeding core 31 to cool the powder feeding core 31, so that on one hand, the problem that the silver powder is stuck on the powder feeding core 31 due to overhigh temperature, the powder feeding amount is influenced, and even the powder feeding core 31 is blocked is avoided, the maintenance time can be reduced, the production continuity is ensured, and the material waste is reduced; and on the other hand, the sealing ring (not shown) near the position is cooled so as to prolong the service life of the sealing ring and save cost. The cooling water jacket 33 is provided with diametrically opposed water inlets and outlets in the side wall for connection to a source of cooling water (not shown), for example via a water inlet tube 34. The conductivity of the cooling water is required to be below 20 mu S/cm, so that the cooling water needs to be replaced by new cooling water if the conductivity of the cooling water is more than 20 mu S/cm during the use process. The cooling water can be pure water or deionized water with the conductivity of less than 6 mu S/cm, and the like.
In this embodiment, the specific structure of the second cooling unit is: cold spray pipe assembly 4 may include a spray pipe base 41, an inner spray pipe 42, an outer sleeve 43, and a cooling return pipe 44. The nozzle holder 41 has a water inlet passage 411 and a water outlet passage 412. The inner lance 42 and the outer jacket 43 form a cooling water channel therebetween. One end of the water inlet passage 411 is communicated with the water outlet (through the water pipe 45) of the cooling water jacket 33, and the other end is communicated with the cooling water passage. The cooling water return pipes 44 are arranged side by side near the outer jacket 43, and have lower ends communicating with the cooling water passage and upper ends communicating with the water outlet passage 412. Outlet pipe 46 is connected to outlet passage 412.
The inner lance 42 is a laval lance. To reduce machining difficulties and costs, the inner nozzle 42 may include an upper inner nozzle segment 421 and a lower inner nozzle segment 422 that are butted together (e.g., by threaded engagement). Wherein, the inner diameter of the upper inner nozzle segment 421 gradually decreases from top to bottom, and the inner diameter of the lower inner nozzle segment 422 gradually increases from top to bottom.
In this case, the inner nozzle 42 may be made of a low-cost material such as high-temperature plastic such as polyimide, or stainless steel.
Fig. 3 shows the operation of the first embodiment of the present invention, wherein the arrows indicate the flow direction of the cooling water. Specifically, cooling water enters the cooling water sleeve 33 through the water inlet pipe 34, and cools the powder feeding core assembly 3 corresponding to the cooling water sleeve 33; then enters the nozzle base 41 from the water outlet of the cooling water sleeve 33 through the water pipe 45 to cool the sealing ring (not shown) in the nozzle base 41, and then enters the cooling water channel between the inner spray pipe 42 and the outer sleeve 43 through the water inlet channel 411 of the nozzle base 41 to cool the inner spray pipe 42 so as to prevent the inner spray pipe from being damaged by overheating; finally, the water is sent to the water storage tank through the cooling water return pipe 44, the water outlet channel 412 and the water outlet pipe 46 in sequence.
Second embodiment:
as shown in fig. 4 to 6, the present embodiment is different from the first embodiment only in that: the second cooling units are different in structure. Only the structure of the second cooling unit will be described below, and the rest of the structure will be referred to the first embodiment. Specifically, cold jet assembly 4 may include a jet block base 41, an inner jet 42, a middle sleeve 43, and an outer sleeve 44. The nozzle holder 41 has a water inlet passage 411 and a water outlet passage 412. A cooling water inlet passage is formed between the inner lance 42 and the middle sleeve 43, and a cooling water return passage is formed between the middle sleeve 43 and the outer sleeve 44. One end of the water inlet passage 411 is communicated with the water outlet (through the water pipe 45) of the cooling water jacket 33, and the other end is communicated with the cooling water inlet passage. The lower end of the cooling water return channel is communicated with the cooling water inlet channel, and the upper end of the cooling water return channel is communicated with the water outlet channel 412. Outlet pipe 46 is connected to outlet passage 412.
Fig. 5 shows the operation of the second embodiment of the present invention, wherein the arrows indicate the flow direction of the cooling water. Specifically, cooling water enters the cooling water sleeve 33 through the water inlet pipe 34, and cools the powder feeding core assembly 3 corresponding to the cooling water sleeve 33; then enters the nozzle base 41 from the water outlet of the cooling water jacket 33 through the water pipe 45 to cool the sealing ring (not shown) in the nozzle base 41, and then enters the cooling water inlet passage between the inner spray pipe 42 and the middle sleeve 43 through the water inlet passage 411 of the nozzle base 41 to cool the inner spray pipe 42 so as to prevent the inner spray pipe from being damaged by overheating; finally, the water is sent to the water storage tank through the cooling water return channel between the middle sleeve 43 and the outer sleeve 44, the water outlet channel 412 and the water outlet pipe 46 in sequence.
While the invention 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 invention as defined by the appended claims.
Claims (7)
1. The utility model provides a cooling device of cold spray gun, cold spray gun includes air chamber, intake pipe, send powder core subassembly and cold spray pipe subassembly, the air chamber has the air inlet, advances powder mouth and export, the intake pipe passes through the air inlet inserts in the air chamber, send powder core subassembly to pass through advance the powder mouth and insert in the air chamber, the cold spray pipe subassembly is installed in the export of air chamber, a serial communication port, cooling device includes first cooling unit and second cooling unit, first cooling unit is used for cooling sending powder core subassembly, the second cooling unit is used for right the spray pipe subassembly cools off, first cooling unit with second cooling unit establishes ties.
2. The cooling device for the cold spray gun according to claim 1, wherein the first cooling unit has a specific structure that the powder feeding core assembly comprises a powder feeding core and a powder feeding core sleeve sleeved on the powder feeding core, a cooling water sleeve is arranged on the powder feeding core sleeve at a position corresponding to the inlet end of the powder feeding core, a radially opposite water inlet and a radially opposite water outlet are arranged on the side wall of the cooling water sleeve, and the water inlet is used for connecting a cooling water source.
3. The cooling device for the cold spray gun according to claim 2, wherein the second cooling unit has a specific structure that: the cold spray pipe assembly comprises a spray pipe seat, an inner spray pipe, an outer sleeve and a cooling water return pipe, wherein the spray pipe seat is provided with a water inlet channel and a water outlet channel, the inner spray pipe and the outer sleeve form a cooling water channel, one end of the water inlet channel is communicated with a water outlet of the cooling water sleeve, the other end of the water inlet channel is communicated with the cooling water channel, the cooling water return pipe is arranged beside the outer sleeve side by side, the lower end of the cooling water return pipe is communicated with the cooling water channel, and the upper end of the cooling water return pipe is communicated with.
4. The cooling device for the cold spray gun according to claim 2, wherein the second cooling unit has a specific structure that: the cold spray pipe assembly comprises a spray pipe seat, an inner spray pipe, a middle sleeve and an outer sleeve, wherein the spray pipe seat is provided with a water inlet channel and a water outlet channel, the inner spray pipe and the middle sleeve form a cooling water inlet channel, the middle sleeve and the outer sleeve form a cooling water return channel, one end of the water inlet channel is communicated with a water outlet of the cooling water sleeve, the other end of the water inlet channel is communicated with the cooling water inlet channel, the lower end of the cooling water return channel is communicated with the cooling water inlet channel, and the upper end of the cooling water return channel is communicated with the water outlet channel.
5. The cooling apparatus for a cold spray gun according to claim 3 or 4, wherein said inner nozzle includes an upper inner nozzle section and a lower inner nozzle section butted together, an inner diameter of said upper inner nozzle section is gradually reduced from top to bottom, and an inner diameter of said lower inner nozzle section is gradually increased from top to bottom.
6. The cooling apparatus for a cold spray gun of claim 5 wherein said inner lance is made of polyimide.
7. The cooling apparatus for a cold spray gun of claim 2 wherein said source of cooling water is tap water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921000059.5U CN210474369U (en) | 2019-06-28 | 2019-06-28 | Cooling device of cold spray gun |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921000059.5U CN210474369U (en) | 2019-06-28 | 2019-06-28 | Cooling device of cold spray gun |
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| CN210474369U true CN210474369U (en) | 2020-05-08 |
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| CN201921000059.5U Active CN210474369U (en) | 2019-06-28 | 2019-06-28 | Cooling device of cold spray gun |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112090609A (en) * | 2020-09-15 | 2020-12-18 | 季华实验室 | Suspension liquid cooling aerodynamic spraying system and application thereof |
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2019
- 2019-06-28 CN CN201921000059.5U patent/CN210474369U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112090609A (en) * | 2020-09-15 | 2020-12-18 | 季华实验室 | Suspension liquid cooling aerodynamic spraying system and application thereof |
| CN112090609B (en) * | 2020-09-15 | 2021-10-29 | 季华实验室 | Suspension liquid cooling aerodynamic spraying system and application thereof |
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