CN202252835U - Low-temperature liquid recycling device based on automatic control - Google Patents
Low-temperature liquid recycling device based on automatic control Download PDFInfo
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- CN202252835U CN202252835U CN2011203209538U CN201120320953U CN202252835U CN 202252835 U CN202252835 U CN 202252835U CN 2011203209538 U CN2011203209538 U CN 2011203209538U CN 201120320953 U CN201120320953 U CN 201120320953U CN 202252835 U CN202252835 U CN 202252835U
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Abstract
The utility model discloses a low-temperature liquid recycling device based on automatic control. The low-temperature liquid recycling device comprises a controller, a pneumatic electromagnetic valve set, a recycling storing groove and a transferring container, wherein the pneumatic electromagnetic valve set is electrically connected with the controller, and is capable of controlling the input and output of the liquid and gas in the transferring container; an air inlet hole of the pneumatic electromagnetic valve set is connected with a gas source; and the recycling storing groove is in communication with the transferring container by a pipeline. The low-temperature liquid recycling device based on automatic control has the advantages as follows: the function of online monitoring the operation conditions is achieved; the liquid level parameter and the pressure parameter can be adjusted and set as requirements; and automatic control performance is achieved.
Description
Technical field
The utility model relates to the recovery technology field of cryogenic liquide, particularly a kind of cryogenic liquide recovery plant based on automatic control.
Background technique
Cryogenic liquide (liquid oxygen, liquid hydrogen, liquid nitrogen, liquid argon, liquid helium) is widely used in technical fields such as industry, space flight and scientific research; Especially in the Space Science and Technology field; All component equipments that are applied to the space all need carry out cold performance test, and required test cooling medium is generally liquid nitrogen, and liquid nitrogen passes to component equipment with cold and vaporizes during aptitude test; Can't reclaim but still there is part liquid nitrogen to enter atmosphere mutually, cause a large amount of wastes with gas-liquid mixed.
In order to solve the waste problem of cryogenic liquide, the someone has produced the cryogenic liquide recovering container, though the kind of the cryogenic liquide recovering container of existing technology is more; But all adopt manual manipulation mode; Can not carry out on-line monitoring to the cryogenic liquide recovering container, manual operations is also more loaded down with trivial details, and the parameter of liquid level and pressure is several numerical value of fixing simultaneously; Be difficult for careless change, can't realize controlling automatically function.
The model utility content
The utility model technical problem to be solved is, a kind of on-line monitoring function that realized is provided, and can set the cryogenic liquide recovery plant based on automatic control of liquid level parameter and pressure parameter as required.
For solving the problems of the technologies described above; The cryogenic liquide recovery plant that the utility model provides based on automatic control; It comprises controller, air-operated solenoid valve group, reclaims storage tank and metaideophone container; Said air-operated solenoid valve group is electrically connected with controller and input, the discharge of air-operated solenoid valve group control metaideophone liquid in containers and gas, and the inlet hole of air-operated solenoid valve group is connected with source of the gas, and described recovery storage tank is communicated with through pipeline with the metaideophone container.
After adopting above structure; The utility model based on the cryogenic liquide recovery plant of automatic control compared with prior art; Have the following advantages: realized the function of in-service monitoring operating conditions, liquid level parameter and pressure parameter can be adjusted setting as required, have realized automation control function.
As improvement, described metaideophone container comprises outer container, following container and place down the upper container directly over the container, and described upper container and following container are respectively seal container and place in the outer container; Following container is fixedly connected with outer container, and upper container is fixedly connected with following container, and described upper container is communicated with through second pipeline with following container; The bottom of said outer container is provided with pressurized machine; The input end of said pressurized machine and output terminal are communicated with following container through the 3rd pipeline and first pipeline respectively, are pumped into vacuum in the outer container, make the effect of heat insulation of entire container better; Upper container adopts with following container and goes up held, has made things convenient for the recovery metaideophone of liquid.
As further improvement, said upper container is provided with the upper container liquid inlet pipe, and said upper container liquid inlet pipe is provided with first hand stop valve, and said second pipeline is provided with first pneumatic stopping valve, and said first pipeline is provided with the 4th pneumatic stopping valve; Said container down is provided with down the container liquid-discharging tube, and said container liquid-discharging tube down is provided with second pneumatic stopping valve; Said recovery storage tank is communicated with through following container liquid-discharging tube with the metaideophone container, comes the flowing state of controlling liquid through first hand stop valve, first pneumatic stopping valve, the 4th pneumatic stopping valve and second pneumatic stopping valve.
As further improvement, said upper container is provided with the upper container outlet pipe, is respectively equipped with second hand stop valve and second safety valve on the said upper container outlet pipe, and said second hand stop valve and second safety valve are connected in parallel on the upper container outlet pipe; Said container down is provided with down vessel exhaust pipe, and said vessel exhaust pipe down is provided with the 3rd pneumatic stopping valve and first safety valve, and said the 3rd pneumatic stopping valve and first safety valve are connected in parallel on down on the vessel exhaust pipe; Said recovery storage tank is provided with and reclaims the storage tank outlet pipe, and said recovery storage tank outlet pipe is provided with the 4th hand stop valve, guarantees the safety of the steady and container of upper container, following container and recovery storage tank internal air pressure.
As further improvement; Said upper container is provided with first pressure gauge and first liquid level sensor; Said container down is provided with second pressure gauge and second liquid level sensor; Described first liquid level sensor, second pressure gauge and second liquid level sensor all are electrically connected with controller; Convert the data of first liquid level sensor and the second liquid level sensor collection to electrical signal through fluid level transmitter and be sent in the controller, convert the data of the second pressure gauge collection to electrical signal through pressure transmitter and be sent in the controller, and then understand operation conditions through controller; Realize the function of in-service monitoring operating conditions, adjusted liquid level parameter and pressure parameter as required.
As further improvement; Said container down is provided with down the container suction tude; Said container suction tude down is provided with the 5th pneumatic stopping valve and the 3rd hand stop valve; Said the 5th pneumatic stopping valve and the 3rd hand stop valve are connected on down on the container suction tude, close the 4th pneumatic stopping valve, directly will descend the liquid nitrogen in the container to be transported in the recovery storage tank to following container inflation.
As further improvement, the unit solenoid valve in the described air-operated solenoid valve group is two five-way air-operated solenoid valves.
As further improving; The air outlet hole of two the five-way air-operated solenoid valves in unit in the air-operated solenoid valve group all is connected with double-acting cylinder; The free end of each double-acting air cylinder piston bar is connected with first pneumatic stopping valve, second pneumatic stopping valve, the 3rd pneumatic stopping valve, the 4th pneumatic stopping valve and the valve of the 5th pneumatic stopping valve respectively; Through controller control air-operated solenoid valve group; Again through the moving up and down of two the five-way air-operated solenoid valves in the unit in air-operated solenoid valve group control double-acting air cylinder piston bar, so drive first pneumatic stopping valve, second pneumatic stopping valve, the 3rd pneumatic stopping valve, the 4th pneumatic stopping valve and the 5th pneumatic stopping valve valve unlatching or close.
Description of drawings
Fig. 1 is the metaideophone structure of container sectional view of the utility model based on the cryogenic liquide recovery plant of automatic control;
Fig. 2 is the metaideophone structure of container A-A view of the utility model based on the cryogenic liquide recovery plant of automatic control;
Fig. 3 is the system process figure of the utility model based on the cryogenic liquide recovery plant of automatic control;
Fig. 4 is the circuit connection diagram of the utility model based on the cryogenic liquide recovery plant of automatic control.
Wherein: controller 1; Air-operated solenoid valve group 2; The first two five-way air-operated solenoid valve 2.1.1; The second two five-way air-operated solenoid valve group 2.1.2; The 3 two five-way air-operated solenoid valve 2.1.3; The 4 two five-way air-operated solenoid valve 2.1.4; The 5 two five-way air-operated solenoid valve 2.1.5; The first double-acting cylinder 2.2.1; The second double-acting cylinder 2.2.2; The 3rd double-acting cylinder 2.2.3; The 4th double-acting cylinder 2.2.4; The 5th double-acting cylinder 2.2.5; Reclaim storage tank 3; Metaideophone container 4; Outer container 4.1; Following container 4.2; The second liquid level sensor 4.2.1; The second pressure gauge 4.2.2; Following container liquid-discharging tube 4.2.3; Following vessel exhaust pipe 4.2.4; Following container suction tude 4.2.5; Upper container 4.3; The first liquid level sensor 4.3.1; The first pressure gauge 4.3.2; Upper container liquid inlet pipe 4.3.3; Upper container outlet pipe 4.3.4; Chain 4.4; Connecting rod 4.5; Pressurized machine 5; First pneumatic stopping valve 6; Second pneumatic stopping valve 7; The 3rd pneumatic stopping valve 8; The 4th pneumatic stopping valve 9; The 5th pneumatic stopping valve 10; First hand stop valve 11; Second hand stop valve 12; Second safety valve 13; First safety valve 14; The 3rd hand stop valve 15; The 4th hand stop valve 16; Reclaim storage tank outlet pipe 17; Second pipeline 18; The 3rd pipeline 19; First pipeline 20.
Embodiment
Combine accompanying drawing that the utility model is done further to describe through embodiment below.
Embodiment 1:
In the present embodiment, said air-operated solenoid valve group 2 comprises: the first two five-way air-operated solenoid valve 2.1.1, the second two five-way air-operated solenoid valve group 2.1.2, the 3 two five-way air-operated solenoid valve 2.1.3, the 4 two five-way air-operated solenoid valve 2.1.4, the 5 two five-way air-operated solenoid valve 2.1.5, the first double-acting cylinder 2.2.1, the second double-acting cylinder 2.2.2, the 3rd double-acting cylinder 2.2.3, the 4th double-acting cylinder 2.2.4, the 5th double-acting cylinder 2.2.5.
Like Fig. 1～shown in Figure 4; It comprises controller 1, air-operated solenoid valve group 2, reclaims storage tank 3 and metaideophone container 4; Said air-operated solenoid valve group 2 be electrically connected with controller 1 and air-operated solenoid valve group 2 control metaideophone containers 4 in input, the discharge of liquid and gas; The inlet hole of air-operated solenoid valve group 2 is connected with source of the gas, and described recovery storage tank 3 and metaideophone container 4 are communicated with through pipeline.
Described metaideophone container 4 comprises outer container 4.1, following container 4.2 and place down the upper container 4.3 directly over the container 4.2; Described upper container 4.3 is respectively seal container with following container 4.2 and places in the outer container 4.1; Following container 4.2 is fixedly connected with outer container 4.1 through chain 4.4, and upper container 4.3 is fixedly connected with following container 4.2 through connecting rod 4.5, and described upper container 4.3 is communicated with through second pipeline 18 with following container 4.2; The bottom of said outer container 4.1 is provided with pressurized machine 5; The input end of said pressurized machine 5 and output terminal are communicated with following container 4.2 through the 3rd pipeline 19 and first pipeline 20 respectively, are pumped into vacuum in the outer container 4.1, make the effect of heat insulation of entire container better; Upper container 4.3 adopts with following container 4.2 and goes up held; Made things convenient for the liquid nitrogen in the upper container 4.3 to enter into down in container 4.2 and the pressurized machine 5, liquid nitrogen turns back to down in the container 4.2 after pressurized machine 5 vaporizations, and the nitrogen after the vaporization will descend the liquid nitrogen in the container 4.2 to be pressed into and reclaim in the storage tank 3.
Said upper container 4.3 is provided with upper container liquid inlet pipe 4.3.3, and said upper container liquid inlet pipe 4.3.3 is provided with first hand stop valve 11, and said second pipeline 18 is provided with first pneumatic stopping valve 6, and said first pipeline 20 is provided with the 4th pneumatic stopping valve 9; Said container 4.2 down is provided with down container liquid-discharging tube 4.2.3, and said container liquid-discharging tube 4.2.3 down is provided with second pneumatic stopping valve 7; Said recovery storage tank 3 is communicated with through following container liquid-discharging tube 4.2.3 with metaideophone container 4; Under the state that first hand stop valve 11, first pneumatic stopping valve 6 and the 4th pneumatic stopping valve 9 are opened; The nitrogen that gas-liquid two-phase mixes gets in the upper container 4.3 through liquid inlet pipe, and liquid nitrogen flow into down container 4.2 from upper container 4.3 then, flows at last in the pressurized machine 5; In the container 4.2, the nitrogen after the vaporization will descend the liquid nitrogen in the container 4.2 to extrude under flowing back into after liquid nitrogen is vaporized in pressurized machine 5.
Said upper container 4.3 is provided with upper container outlet pipe 4.3.4; Be respectively equipped with second hand stop valve 12 and second safety valve 13 on the said upper container outlet pipe 4.3.4, said second hand stop valve 12 and second safety valve 13 are connected in parallel on the upper container outlet pipe 4.3.4; Said container 4.2 down is provided with down vessel exhaust pipe 4.2.4, and said vessel exhaust pipe 4.2.4 down is provided with the 3rd pneumatic stopping valve 8 and first safety valve 14, and said the 3rd pneumatic stopping valve 8 and first safety valve 14 are connected in parallel on down on the vessel exhaust pipe 4.2.4; Said recovery storage tank 3 is provided with and reclaims storage tank outlet pipe 17; Said recovery storage tank outlet pipe 17 is provided with the 4th hand stop valve 16, and the nitrogen that gas-liquid two-phase mixes flow in the upper container 4.3, and is steady in order to guarantee upper container 4.3 internal air pressures; Gas in the upper container 4.3 and the nitrogen that charges into are discharged; When liquid nitrogen flow into down container 4.2 and reclaims storage tank 3, in order to guarantee down container 4.2 and to reclaim the steady of storage tank 3 internal air pressures, with following container 4.2 and the gases discharge of reclaiming in the storage tank 3.
Said upper container 4.3 is provided with the first pressure gauge 4.3.2 and the first liquid level sensor 4.3.1; Said container 4.2 down is provided with the second pressure gauge 4.2.2 and the second liquid level sensor 4.2.1; The described first liquid level sensor 4.3.1, the second pressure gauge 4.2.2 and the second liquid level sensor 4.2.1 all are electrically connected with controller 1; The data that the first liquid level sensor 4.3.1 and the second liquid level sensor 4.2.1 are gathered convert electrical signal to through fluid level transmitter and are sent in the controller 1; The data that the second pressure gauge 4.2.2 is gathered convert electrical signal to through pressure transmitter and are sent in the controller 1, and then understand operation conditions through controller 1.
The air outlet hole of two the five-way air-operated solenoid valves in unit in the air-operated solenoid valve group 2 all is connected with double-acting cylinder; The free end of each double-acting air cylinder piston bar is connected with the valve of first pneumatic stopping valve 6, second pneumatic stopping valve 7, the 3rd pneumatic stopping valve 8, the 4th pneumatic stopping valve 9 and the 5th pneumatic stopping valve 10 respectively; Controller 1 is controlled the first two five-way air-operated solenoid valve 2.1.1, the second two five-way air-operated solenoid valve group 2.1.2, the 3 two five-way air-operated solenoid valve 2.1.3 and the 4 two five-way air-operated solenoid valve 2.1.4 respectively; The first two five-way air-operated solenoid valve 2.1.1 control the first double-acting cylinder 2.2.1 piston rod and move up and down; Piston rod drives the unlatching of first pneumatic stopping valve, 6 valves or closes; The second two five-way air-operated solenoid valve 2.1.2 control the second double-acting cylinder 2.2.2 piston rod and move up and down; Piston rod drives the unlatching of second pneumatic stopping valve, 7 valves or closes; The 3 two five-way air-operated solenoid valve 2.1.3 controls the 3rd double-acting cylinder 2.2.3 piston rod and moves up and down; Piston rod drives the unlatching of the 3rd pneumatic stopping valve 8 valves or closes, and the 4 two five-way air-operated solenoid valve 2.1.4 controls the 4th double-acting cylinder 2.2.4 piston rod and move up and down, and piston rod drives the unlatching of the 4th pneumatic stopping valve 9 valves or closes.
Parameter is provided with:
Following container discharge opeing liquid level: 450mm; Following container minimum liquid level: 60mm; Following container is absorbed in pressure: 0.4Mpa.
Working method based on the cryogenic liquide recovery plant of automatic control:
1. manually opened first hand stop valve 11 and second hand stop valve 12; The nitrogen that gas-liquid two-phase is mixed is injected in the upper container 4.3; The first double-acting cylinder 2.2.1 piston rod moved up and opened first pneumatic stopping valve, 6 valves this moment, and the 3rd double-acting cylinder 2.2.3 piston rod moves up and opens the 3rd pneumatic stopping valve 8, and the gas in the nitrogen of injection and the upper container 4.3 is discharged through upper container outlet pipe 4.3.4; Liquid nitrogen flow into down the container 4.2 from upper container 4.3 through second pipeline 18; Liquid nitrogen flow into down in container 4.2 processes, and the gas warp in the following container 4.2 vessel exhaust pipe 4.2.4 is down discharged, and guarantees the steady of upper container 4.3 and following container 4.2 internal air pressures;
2. gather the data of coming through the second liquid level sensor 4.2.1; Demonstrate down the liquid level in the container 4.2; When container 4.2 liquid reserves reach 450mm instantly; The first double-acting cylinder 2.2.1 piston rod moves down closes first pneumatic stopping valve 6 and the 3rd double-acting cylinder 2.2.3 piston rod and moves down and close the 3rd pneumatic stopping valve 8, the four double-acting cylinder 2.2.4 piston rods and move up and open the 4th pneumatic stopping valve 9, and the liquid nitrogen of part enters into pressurized machine 5 through the 3rd pipeline 19 in the following container 4.2; Liquid nitrogen is through pressurized machine 5 vaporizations; Nitrogen after vaporizing is back to down in the container 4.2 through first pipeline 20, and the air pressure in the container 4.2 are raise, and the nitrogen that meanwhile enters into the gas-liquid two-phase mixing of upper container 4.3 is stored in the upper container 4.3 temporarily;
3. when container pressure table 4.2.2 data presented reaches 0.4Mpa instantly; The second double-acting cylinder 2.2.2 piston rod moves up and opens second pneumatic stopping valve 7; Under the effect of pressure; Liquid nitrogen warp in the following container 4.2 container liquid-discharging tube 4.2.3 down flow in the recovery storage tank 3; The data of gathering through the second liquid level sensor 4.2.1 then, show when container 4.2 liquid reach 60mm down (the following container liquid-discharging tube 4.2.3 of described second pneumatic stopping valve 7 controls has enough big cross section, can not cause down container 4.2 liquid as yet not metaideophone carry end and upper container 4.3 be full of by liquid); The 4th double-acting cylinder 2.2.4 piston rod moves down closes the 4th pneumatic stopping valve 9; The first double-acting cylinder 2.2.1 piston rod moves up and opens first pneumatic stopping valve 6 and move up with the 3rd double-acting cylinder 2.2.3 piston rod and open the 3rd pneumatic stopping valve 8, and storage temporarily gathers in the nitrogen of the gas-liquid two-phase mixing of upper container 4.3 and flow into down in the container 4.2, begins new one and takes turns the recovery metaideophone.
Embodiment 2:
Other technological process is constant; Said container 4.2 down is provided with down container suction tude 4.2.5; Said container suction tude 4.2.5 down is provided with the 5th pneumatic stopping valve 10 and the 3rd hand stop valve 15; Said the 5th pneumatic stopping valve 10 and the 3rd hand stop valve 15 are connected on down on the container suction tude 4.2.5, and the valve of described the 5th pneumatic stopping valve 10 is connected with the free end of the 5th double-acting cylinder 2.2.5 piston rod, and the 5th double-acting cylinder 2.2.5 piston rod moves up and opens the 5th pneumatic stopping valve 10; Manually opened the 3rd hand stop valve 15 of while; The 4th double-acting cylinder 2.2.4 piston rod moves down closes the 4th pneumatic stopping valve 9, forbids that liquid nitrogen is flow in the pressurized machine 5 by following container 4.2, directly will descend the liquid nitrogen in the container 4.2 to be pressed in the recovery storage tank 3 to following container 4.2 inflations.
Claims (8)
1. cryogenic liquide recovery plant based on automatic control; It is characterized in that: it comprises controller (1), air-operated solenoid valve group (2), reclaims storage tank (3) and metaideophone container (4); Said air-operated solenoid valve group (2) be electrically connected with controller (1) and air-operated solenoid valve group (2) control metaideophone container (4) in input, the discharge of liquid and gas; The inlet hole of air-operated solenoid valve group (2) is connected with source of the gas, and described recovery storage tank (3) is communicated with through pipeline with metaideophone container (4).
2. the cryogenic liquide recovery plant based on automatic control according to claim 1; It is characterized in that: described metaideophone container (4) comprises outer container (4.1), following container (4.2) and place down the upper container (4.3) directly over the container (4.2); Described upper container (4.3) and following container (4.2) are respectively seal container and place in the outer container (4.1); Following container (4.2) is fixedly connected with outer container (4.1); Upper container (4.3) is fixedly connected with following container (4.2); Described upper container (4.3) is communicated with through second pipeline (18) with following container (4.2), and the bottom of said outer container (4.1) is provided with pressurized machine (5), and the input end of said pressurized machine (5) and output terminal are communicated with following container (4.2) through the 3rd pipeline (19) and first pipeline (20) respectively.
3. the cryogenic liquide recovery plant based on automatic control according to claim 1; It is characterized in that: said upper container (4.3) is provided with upper container liquid inlet pipe (4.3.3); Said upper container liquid inlet pipe (4.3.3) is provided with first hand stop valve (11); Said second pipeline (18) is provided with first pneumatic stopping valve (6), and said first pipeline (20) is provided with the 4th pneumatic stopping valve (9); Said container (4.2) down is provided with down container liquid-discharging tube (4.2.3), and said container liquid-discharging tube (4.2.3) down is provided with second pneumatic stopping valve (7); Said recovery storage tank (3) is communicated with through following container liquid-discharging tube (4.2.3) with metaideophone container (4).
4. the cryogenic liquide recovery plant based on automatic control according to claim 1; It is characterized in that: said upper container (4.3) is provided with upper container outlet pipe (4.3.4); Be respectively equipped with second hand stop valve (12) and second safety valve (13) on the said upper container outlet pipe (4.3.4), said second hand stop valve (12) and second safety valve (13) are connected in parallel on the upper container outlet pipe (4.3.4); Said container (4.2) down is provided with down vessel exhaust pipe (4.2.4); Said vessel exhaust pipe (4.2.4) down is provided with the 3rd pneumatic stopping valve (8) and first safety valve (14), and said the 3rd pneumatic stopping valve (8) and first safety valve (14) are connected in parallel on down on the vessel exhaust pipe (4.2.4); Said recovery storage tank (3) is provided with and reclaims storage tank outlet pipe (17), and said recovery storage tank outlet pipe (17) is provided with the 4th hand stop valve (16).
5. the cryogenic liquide recovery plant based on automatic control according to claim 1; It is characterized in that: said upper container (4.3) is provided with first pressure gauge (4.3.2) and first liquid level sensor (4.3.1); Said container (4.2) down is provided with second pressure gauge (4.2.2) and second liquid level sensor (4.2.1), and described first liquid level sensor (4.3.1), second pressure gauge (4.2.2) and second liquid level sensor (4.2.1) all are electrically connected with controller (1).
6. the cryogenic liquide recovery plant based on automatic control according to claim 1; It is characterized in that: said container (4.2) down is provided with down container suction tude (4.2.5); Said container suction tude (4.2.5) down is provided with the 5th pneumatic stopping valve (10) and the 3rd hand stop valve (15), and said the 5th pneumatic stopping valve (10) and the 3rd hand stop valve (15) are connected on down on the container suction tude (4.2.5).
7. the cryogenic liquide recovery plant based on automatic control according to claim 1 is characterized in that, the unit solenoid valve in the described air-operated solenoid valve group (2) is two five-way air-operated solenoid valves.
8. the cryogenic liquide recovery plant based on automatic control according to claim 1; It is characterized in that: the air outlet hole of two the five-way air-operated solenoid valves in unit in the air-operated solenoid valve group (2) all is connected with double-acting cylinder, and the free end of each double-acting air cylinder piston bar is connected with first pneumatic stopping valve (6), second pneumatic stopping valve (7), the 3rd pneumatic stopping valve (8), the 4th pneumatic stopping valve (9) and the valve of the 5th pneumatic stopping valve (10) respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203209538U CN202252835U (en) | 2011-08-30 | 2011-08-30 | Low-temperature liquid recycling device based on automatic control |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203209538U CN202252835U (en) | 2011-08-30 | 2011-08-30 | Low-temperature liquid recycling device based on automatic control |
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| Publication Number | Publication Date |
|---|---|
| CN202252835U true CN202252835U (en) | 2012-05-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203209538U Withdrawn - After Issue CN202252835U (en) | 2011-08-30 | 2011-08-30 | Low-temperature liquid recycling device based on automatic control |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102305346A (en) * | 2011-08-30 | 2012-01-04 | 杭州凯德空分设备有限公司 | Low-temperature liquid recovery equipment based on automatic control |
-
2011
- 2011-08-30 CN CN2011203209538U patent/CN202252835U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102305346A (en) * | 2011-08-30 | 2012-01-04 | 杭州凯德空分设备有限公司 | Low-temperature liquid recovery equipment based on automatic control |
| CN102305346B (en) * | 2011-08-30 | 2013-02-13 | 杭州凯德空分设备有限公司 | Low-temperature liquid recovery equipment based on automatic control |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20120530 Effective date of abandoning: 20130227 |
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| RGAV | Abandon patent right to avoid regrant |