CN211215521U - Potassium nitrate crystallization vacuum cooling device - Google Patents
Potassium nitrate crystallization vacuum cooling device Download PDFInfo
- Publication number
- CN211215521U CN211215521U CN201922001732.3U CN201922001732U CN211215521U CN 211215521 U CN211215521 U CN 211215521U CN 201922001732 U CN201922001732 U CN 201922001732U CN 211215521 U CN211215521 U CN 211215521U
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- Prior art keywords
- fixedly connected
- shell
- potassium nitrate
- wall
- box
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- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 title claims abstract description 92
- 235000010333 potassium nitrate Nutrition 0.000 title claims abstract description 46
- 239000004323 potassium nitrate Substances 0.000 title claims abstract description 46
- 238000001816 cooling Methods 0.000 title claims abstract description 23
- 238000002425 crystallisation Methods 0.000 title claims abstract description 10
- 230000008025 crystallization Effects 0.000 title claims abstract description 10
- 239000013078 crystal Substances 0.000 claims abstract description 22
- 230000004888 barrier function Effects 0.000 claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 20
- 239000000463 material Substances 0.000 claims description 13
- 239000007788 liquid Substances 0.000 claims description 12
- 238000007790 scraping Methods 0.000 claims description 5
- 238000007599 discharging Methods 0.000 claims description 2
- 238000009825 accumulation Methods 0.000 abstract description 3
- 239000002699 waste material Substances 0.000 abstract description 3
- 239000000243 solution Substances 0.000 description 15
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 description 6
- 239000000047 product Substances 0.000 description 5
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 4
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000001103 potassium chloride Substances 0.000 description 3
- 235000011164 potassium chloride Nutrition 0.000 description 3
- PAWQVTBBRAZDMG-UHFFFAOYSA-N 2-(3-bromo-2-fluorophenyl)acetic acid Chemical compound OC(=O)CC1=CC=CC(Br)=C1F PAWQVTBBRAZDMG-UHFFFAOYSA-N 0.000 description 2
- 235000019270 ammonium chloride Nutrition 0.000 description 2
- 230000008602 contraction Effects 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 239000012047 saturated solution Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000011780 sodium chloride Substances 0.000 description 2
- VWDWKYIASSYTQR-UHFFFAOYSA-N sodium nitrate Chemical compound [Na+].[O-][N+]([O-])=O VWDWKYIASSYTQR-UHFFFAOYSA-N 0.000 description 2
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- XYMGITWDJOFQCD-UHFFFAOYSA-N [Cl-].[NH4+].[N+](=O)([O-])[O-].[K+] Chemical compound [Cl-].[NH4+].[N+](=O)([O-])[O-].[K+] XYMGITWDJOFQCD-UHFFFAOYSA-N 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000012043 crude product Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000003721 gunpowder Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 239000012452 mother liquor Substances 0.000 description 1
- 239000005304 optical glass Substances 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- KWPRMONEGGYFHN-UHFFFAOYSA-M potassium;sodium;chloride;nitrate Chemical compound [Na+].[K]Cl.[O-][N+]([O-])=O KWPRMONEGGYFHN-UHFFFAOYSA-M 0.000 description 1
- 235000010344 sodium nitrate Nutrition 0.000 description 1
- 239000004317 sodium nitrate Substances 0.000 description 1
- 159000000000 sodium salts Chemical class 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
The utility model discloses a potassium nitrate crystallization vacuum cooling device, which comprises an outer shell, fixedly connected with box between the both sides of shell inner wall, one side fixedly connected with mounting groove at box top, the open slot has all been seted up to the both sides of mounting groove, sliding connection has the barrier plate between the both sides of mounting groove inner wall, be provided with expanding spring between the bottom of barrier plate and the top of mounting groove inner wall, the fixed frame of top fixedly connected with of box inner wall, be provided with the draw-in groove between the both sides of fixed frame inner wall, the top of box and be located the first motor of right side fixedly connected with of mounting groove, the output shaft fixedly connected with dwang of first motor. This potassium nitrate crystal vacuum cooling device uses through first motor and second electric telescopic handle's cooperation and makes adnexed potassium nitrate crystal can be fine the quilt get off, has avoided the accumulation of potassium nitrate crystal and has leaded to the waste of resource, has still reduced the number of times of maintaining the clearance.
Description
Technical Field
The utility model relates to a cooling device, in particular to a potassium nitrate crystal vacuum cooling device.
Background
Potassium nitrate is an important inorganic chemical product, industrial potassium nitrate is mainly used for manufacturing black gunpowder, fireworks and firecrackers, matches, glass products, optical glass and the like, agricultural potassium nitrate is a high-quality compound fertilizer, and the potassium nitrate is not in demand in the market for a long time and belongs to a product in short supply. The domestic potassium nitrate production method mainly comprises the following steps: a sodium nitrate-potassium chloride conversion method, wherein sodium nitrate and potassium chloride are mixed, and sodium chloride is separated out while evaporation is carried out, so that sodium chloride is separated out; the mother liquor is properly diluted to prevent sodium salt from being separated out, and then is cooled to about 5 ℃ to separate out potassium nitrate as a product, the potassium nitrate as a crude product is centrifugally filtered and washed to obtain potassium nitrate, and the potassium nitrate as a product can be recrystallized to obtain industrial-grade potassium nitrate. The ammonium nitrate-potassium chloride conversion method is characterized by that it utilizes the reaction of ammonium nitrate and potassium chloride to produce potassium nitrate and by-product ammonium chloride, and the solution after the reaction is formed from potassium chloride, ammonium nitrate, potassium nitrate and ammonium chloride, and when the temperature is reduced, the potassium nitrate content in the mixed solution is large, and the crystallization area is enlarged, and a reasonable equipment is selected, and the temperature is reduced so as to make most of potassium nitrate in the solution be crystallized out, and can attain the goal of separating potassium nitrate.
Present potassium nitrate crystal vacuum cooling device can't carry out fine row material, and difficult meeting adhesion after the potassium nitrate crystallization is on the inner wall of exempting from, if not handle the waste that long-time accumulation not only leads to the resource, the clearance process in later stage is also comparatively troublesome moreover for the maintenance cost of device is too high. Accordingly, those skilled in the art have provided a vacuum cooling apparatus for potassium nitrate crystals to solve the problems set forth in the background art.
Disclosure of Invention
An object of the utility model is to provide a potassium nitrate crystallization vacuum cooling device to solve the problem that proposes in the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme:
a potassium nitrate crystallization vacuum cooling device comprises a shell, wherein a box body is fixedly connected between two sides of the inner wall of the shell, the box body is circular, one side of the top of the box body is fixedly connected with a mounting groove, open grooves are formed in two sides of the mounting groove, a stop plate is connected between two sides of the inner wall of the mounting groove in a sliding manner, a telescopic spring is arranged between the bottom of the stop plate and the top of the inner wall of the mounting groove, a fixed frame is fixedly connected with the top of the inner wall of the box body, the fixed frame is circular, a clamping groove is formed between two sides of the inner wall of the fixed frame, the clamping groove is circular, teeth are arranged on the inner wall of the clamping groove and are meshed with a second gear, a first motor is fixedly connected at the top of the box body and positioned on the right side, the bottom end of the rotating rod sequentially penetrates through the box body and the fixed frame and extends into the fixed frame, the outer surface of one end of the rotating rod, which extends into the fixed frame, is fixedly connected with a first gear, the outer surface of the first gear is meshed with a second gear, the second gear is clamped in the clamping groove, the second gear is supported by the clamping groove and the supporting plate at the bottom of the rotating rod, the bottom of the second gear is fixedly connected with a second electric telescopic rod, the second electric telescopic rod is connected with an external power supply by a control switch, the bottom end of the second electric telescopic rod is fixedly connected with a scraping disc, the top of the box body and the right side of the first motor are fixedly connected with a vacuum pump, an exhaust pipe is communicated between an air inlet of the vacuum pump and the top of the box body, an air outlet of the vacuum pump is communicated with a connecting pipe, and one end of the connecting pipe penetrates through the shell and extends to the outside of the shell.
As a further aspect of the present invention: the right side fixedly connected with condenser of shell, the right side of shell just is located the bottom fixedly connected with water tank of condenser, the intercommunication has the water pipe between condenser and the one side that the water tank is relative.
As a further aspect of the present invention: the top sliding connection of shell has the feed liquor pipe, the inside that the shell and extended to the shell is run through to the bottom of feed liquor pipe, the external fixed surface of feed liquor socle end is connected with the fixed block, the first electric telescopic handle of equal fixedly connected with between the both sides of fixed block and the top of shell inner wall, first electric telescopic handle passes through control switch and is connected with external power source.
As a further aspect of the present invention: the bottom fixedly connected with of shell inner wall receives the workbin, the top intercommunication of receiving the workbin has the inlet pipe, the bottom intercommunication of box has row material pipe.
As a further aspect of the present invention: arrange fixedly connected with fixed slot between one side that material pipe and inlet pipe are relative, sliding connection has the sliding plate between the front and the back of fixed slot inner wall, one side of sliding plate runs through the fixed slot and extends to the right side of fixed slot.
As a further aspect of the present invention: receive the top of workbin and be located inlet pipe fixedly connected with fixed plate, the top sliding connection of fixed plate has the straight-teeth plate, receive the top of workbin and be located the right side fixedly connected with second motor of fixed plate, the second motor passes through control switch and is connected with external power, and the second motor is servo motor, can just reverse as required, the outer fixed surface of second motor output shaft is connected with the third gear, the surface of third gear and the surface engagement of straight-teeth plate.
Compared with the prior art, the beneficial effects of the utility model are that:
by starting the first electric telescopic rod, the first electric telescopic rod extends to drive the liquid inlet pipe to move downwards, the bottom end of the liquid inlet pipe extrudes the barrier plate to drive the barrier plate to move downwards, the barrier plate extrudes the telescopic spring to expose the open slot, saturated solution obtained by heating and concentrating potassium nitrate is poured from the liquid inlet pipe, the liquid inlet pipe is driven to move upwards by the contraction of the first electric telescopic rod, the telescopic spring restores the barrier plate to the original state due to the elasticity of the telescopic spring, the open slot is blocked again, the sealing property inside the box body is effectively ensured, the vacuum pump gradually pumps away air in the box body by starting the vacuum pump, so that the box body is in a vacuum state, the temperature in the box body is reduced;
after the potassium nitrate crystal is appeared finishing, through the start-up of first motor, first motor rotates and drives first gear revolve, first gear drives the second gear and is circular motion, and second gear self is also rotatory, thereby it rotates to drive the scraping plate, cooperation second electric telescopic handle's use, scrape the material to the box inner wall, the second motor starts, the second motor drives the straight-teeth board and moves right, the sliding plate moves right, arrange material pipe and inlet pipe intercommunication, thereby the potassium nitrate crystal falls into and receives the workbin to store, make adnexed potassium nitrate crystal can be fine be scraped and get off, the accumulation of potassium nitrate crystal and the waste that leads to the resource have been avoided, still reduced the number of times of maintaining the clearance.
Drawings
Fig. 1 is a schematic structural view of a potassium nitrate crystal vacuum cooling device.
Fig. 2 is a schematic structural diagram of a mounting groove in a potassium nitrate crystal vacuum cooling device.
Fig. 3 is a schematic structural view of a fixing frame in the potassium nitrate crystal vacuum cooling device.
FIG. 4 is a top view of a fixing frame in the vacuum cooling device for potassium nitrate crystals.
In the figure: 1-shell, 2-box, 3-mounting groove, 4-open groove, 5-baffle plate, 6-expansion spring, 7-fixing frame, 8-clamping groove, 9-first motor, 10-rotating rod, 11-first gear, 12-second gear, 13-second electric expansion rod, 14-scraping disk, 15-vacuum pump, 16-air exhaust tube, 17-connecting pipe, 18-condenser, 19-water tank, 20-water pipe, 21-liquid inlet pipe, 22-fixed block, 23-first electric telescopic rod, 24-material collecting box, 25-material inlet pipe, 26-material outlet pipe, 27-fixed groove, 28-sliding plate, 29-fixed plate, 30-straight tooth plate, 31-second motor and 32-third gear.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1 to 4, in the embodiment of the present invention, a potassium nitrate crystallization vacuum cooling device comprises a housing 1, a box body 2 is fixedly connected between two sides of the inner wall of the housing 1, a mounting groove 3 is fixedly connected to one side of the top of the box body 2, open grooves 4 are respectively formed on two sides of the mounting groove 3, a barrier plate 5 is slidably connected between two sides of the inner wall of the mounting groove 3, a sealing ring is arranged on the outer surface of the barrier plate 5, a telescopic spring 6 is arranged between the bottom of the barrier plate 5 and the top of the inner wall of the mounting groove 3, a fixed frame 7 is fixedly connected to the top of the inner wall of the box body 2, a clamping groove 8 is arranged between two sides of the inner wall of the fixed frame 7, a first motor 9 is fixedly connected to the top of the box body 2 and positioned at the right side of the mounting groove 3, a rotating rod 10 is fixedly connected to an output, dwang 10 extends to the first gear 11 of the outer fixed surface fixedly connected with of the inside one end of fixed frame 7, the surface toothing of first gear 11 has second gear 12, the bottom fixedly connected with second electric telescopic handle 13 of second gear 12, the bottom fixedly connected with scraping plate 14 of second electric telescopic handle 13, the top of box 2 just is located the right side fixedly connected with vacuum pump 15 of first motor 9, the intercommunication has exhaust tube 16 between the air inlet of vacuum pump 15 and the top of box 2, the gas outlet intercommunication of vacuum pump 15 has connecting pipe 17, the one end of connecting pipe 17 runs through shell 1 and extends to the outside of shell 1.
The right side fixedly connected with condenser 18 of shell 1, the right side of shell 1 just is located the bottom fixedly connected with water tank 19 of condenser 18, the intercommunication has water pipe 20 between one side that condenser 18 and water tank are relative, and connecting pipe 17 extends to the outside one end of shell 1 and links to each other with condenser 18, and condenser 18 cools off the vapor that vacuum pump 15 took out and becomes water, collects in the water tank 19 that flows in through water pipe 20.
Starting the vacuum pump 15, the vacuum pump 15 pumps air and a small amount of water vapor from the box body 2 in the initial stage, the pressure in the box body 2 is continuously reduced, before the pressure reaches the saturated pressure of the solution, the water in the solution can not be evaporated in a large amount, and the operation of the vacuum pump 15 can not refrigerate the solution. Along with the pressure reduction, after the interior of the box body 2 reaches a certain vacuum degree, the water in the solution starts to be largely vaporized, and meanwhile, the heat is absorbed from the solution, so that the solution is rapidly cooled, and the phenomenon is called flash evaporation effect. The water vapor evaporated from the solution can be instantly pumped away by the vacuum pump 15, most of the water vapor is condensed and discharged when passing through the condenser 18, and a small amount of the remaining water vapor is pumped away by the vacuum pump 15. And then, continuing the cooling process, when the temperature is reduced to a certain-specific temperature region, slowing down the temperature reduction speed, and when the temperature reaches a stable state, balancing the temperature of the solution with the saturated vapor pressure, keeping the temperature of the solution stable, namely reaching the cooling crystallization end point temperature of the solution, and then beginning to separate out crystals from the solution.
The top sliding connection of shell 1 has feed liquor pipe 21, the bottom of feed liquor pipe 21 runs through shell 1 and extends to the inside of shell 1, the external fixed surface of feed liquor pipe 21 bottom is connected with fixed block 22, equal first electric telescopic handle of fixedly connected with 23 between the both sides of fixed block 22 and the top of 1 inner wall of shell, 3 tops of mounting groove are provided with the mouth to the diameter looks adaptation of diameter and feed liquor pipe 21.
The bottom fixedly connected with of shell 1 inner wall receives workbin 24, the top intercommunication of receiving workbin 24 has inlet pipe 25, the bottom intercommunication of box 2 has row material pipe 26.
A fixed groove 27 is fixedly connected between the opposite sides of the discharging pipe 26 and the feeding pipe 25, a sliding plate 28 is slidably connected between the front and back surfaces of the inner wall of the fixed groove 27, and one side of the sliding plate 28 penetrates through the fixed groove 27 and extends to the right side of the fixed groove 27.
Receive workbin 24's top and be located inlet pipe 25 fixedly connected with fixed plate 29, the top sliding connection of fixed plate 29 has spur rack 30, receive workbin 24's top and be located fixed plate 29's right side fixedly connected with second motor 31, the outer fixed surface of second motor 31 output shaft is connected with third gear 32.
The utility model discloses a theory of operation is: by starting the first electric telescopic rod 23, the first electric telescopic rod 23 extends to drive the liquid inlet pipe 21 to move downwards, the bottom end of the liquid inlet pipe 21 extrudes the barrier plate 5 to drive the barrier plate 5 to move downwards, the barrier plate 5 extrudes the telescopic spring 6 to expose the open slot 4, saturated solution obtained by heating and concentrating potassium nitrate is poured into the tank from the liquid inlet pipe 21, and then the contraction of the first electric telescopic rod 23 drives the liquid inlet pipe 21 to move upwards, the telescopic spring 6 restores the barrier plate 5 to the original state due to the elasticity of the telescopic spring 6, the open slot 4 is blocked again, and by starting the vacuum pump 15, the vacuum pump 15 gradually pumps away air in the tank 2, so that the interior of the tank 2 is in a vacuum state, the temperature in the tank 2 is reduced, and potassium;
after the potassium nitrate crystal is appeared finishing, through the start-up of first motor 9, first motor 9 rotates and drives first gear 11 and rotate, first gear 11 drives second gear 12 and is circular motion, and second gear 12 self is also rotatory, thereby drive frizing 14 and rotate, cooperation second electric telescopic handle 13's use, scrape the material to 2 inner walls of box, second motor 31 starts, second motor 31 drives straight-tooth plate 30 and moves right, sliding plate 28 moves right, arrange material pipe 26 and inlet pipe 25 intercommunication, thereby the potassium nitrate crystal falls into and receives workbin 24 to store.
The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.
Claims (6)
1. The utility model provides a potassium nitrate crystallization vacuum cooling device, includes shell (1), its characterized in that, fixedly connected with box (2) between the both sides of shell (1) inner wall, one side fixedly connected with mounting groove (3) at box (2) top, open slot (4) have all been seted up to the both sides of mounting groove (3), sliding connection has barrier plate (5) between the both sides of mounting groove (3) inner wall, be provided with expanding spring (6) between the bottom of barrier plate (5) and the top of mounting groove (3) inner wall, the fixed frame (7) of top fixedly connected with of box (2) inner wall, be provided with draw-in groove (8) between the both sides of fixed frame (7) inner wall, the top of box (2) just is located the first motor (9) of right side fixedly connected with of mounting groove (3), the output shaft fixedly connected with dwang (10) of first motor (9), the bottom end of the rotating rod (10) penetrates through the box body (2) and the fixed frame (7) in sequence and extends into the fixed frame (7), the outer surface of one end of the rotating rod (10) extending into the fixed frame (7) is fixedly connected with a first gear (11), a second gear (12) is meshed with the outer surface of the first gear (11), a second electric telescopic rod (13) is fixedly connected to the bottom of the second gear (12), the bottom end of the second electric telescopic rod (13) is fixedly connected with a scraping disc (14), a vacuum pump (15) is fixedly connected with the top of the box body (2) and positioned at the right side of the first motor (9), an air suction pipe (16) is communicated between the air inlet of the vacuum pump (15) and the top of the box body (2), the air outlet of the vacuum pump (15) is communicated with a connecting pipe (17), and one end of the connecting pipe (17) penetrates through the shell (1) and extends to the outside of the shell (1).
2. The potassium nitrate crystal vacuum cooling device according to claim 1, wherein a condenser (18) is fixedly connected to the right side of the shell (1), a water tank (19) is fixedly connected to the right side of the shell (1) and is positioned at the bottom of the condenser (18), and a water pipe (20) is communicated between the condenser (18) and the side opposite to the water tank.
3. The vacuum cooling device for potassium nitrate crystals according to claim 1, wherein a liquid inlet pipe (21) is slidably connected to the top of the shell (1), the bottom end of the liquid inlet pipe (21) penetrates through the shell (1) and extends to the inside of the shell (1), a fixed block (22) is fixedly connected to the outer surface of the bottom end of the liquid inlet pipe (21), and a first electric telescopic rod (23) is fixedly connected between the two sides of the fixed block (22) and the top of the inner wall of the shell (1).
4. The vacuum cooling device for potassium nitrate crystals according to claim 1, wherein a receiving box (24) is fixedly connected to the bottom of the inner wall of the shell (1), the top of the receiving box (24) is communicated with a feeding pipe (25), and the bottom of the box body (2) is communicated with a discharging pipe (26).
5. The vacuum cooling apparatus for potassium nitrate crystals according to claim 4, wherein a fixing groove (27) is fixedly connected between the opposite sides of the discharge pipe (26) and the feed pipe (25), a sliding plate (28) is slidably connected between the front and rear surfaces of the inner wall of the fixing groove (27), and one side of the sliding plate (28) penetrates through the fixing groove (27) and extends to the right side of the fixing groove (27).
6. The vacuum cooling device for potassium nitrate crystals according to claim 4, wherein the top of the material receiving box (24) is fixedly connected with a fixing plate (29) through a feeding pipe (25), the top of the fixing plate (29) is slidably connected with a straight-tooth plate (30), the top of the material receiving box (24) is fixedly connected with a second motor (31) through the right side of the fixing plate (29), and the outer surface of an output shaft of the second motor (31) is fixedly connected with a third gear (32).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922001732.3U CN211215521U (en) | 2019-11-19 | 2019-11-19 | Potassium nitrate crystallization vacuum cooling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922001732.3U CN211215521U (en) | 2019-11-19 | 2019-11-19 | Potassium nitrate crystallization vacuum cooling device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211215521U true CN211215521U (en) | 2020-08-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922001732.3U Active CN211215521U (en) | 2019-11-19 | 2019-11-19 | Potassium nitrate crystallization vacuum cooling device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211215521U (en) |
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- 2019-11-19 CN CN201922001732.3U patent/CN211215521U/en active Active
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