CN206471034U - The experimental provision that acetylene occurs and purified - Google Patents
The experimental provision that acetylene occurs and purified Download PDFInfo
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- CN206471034U CN206471034U CN201720123950.2U CN201720123950U CN206471034U CN 206471034 U CN206471034 U CN 206471034U CN 201720123950 U CN201720123950 U CN 201720123950U CN 206471034 U CN206471034 U CN 206471034U
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Abstract
The experimental provision for occurring the utility model discloses acetylene and purifying, the bottle mouth position of wide-mouth reagent bottle is provided with 9# rubber stoppers, one end of second short body test tube and sharp nozzle glass three-way pipe is respectively inserted on 9# rubber stoppers, the first short body test tube is cased with second short body test tube, 0# rubber stoppers are set in the bottle mouth position of the first short body test tube, the center of Medical tee joint pipe from 0# rubber stoppers is inserted into the second short body test tube；One end of scalp acupuncture plastic straw is connected on the injection port of plastic injector, the top end opening of the other end of scalp acupuncture plastic straw from medical three-way pipe is stretched into up to the lower plug face of 0# rubber stoppers, the other end end of scalp acupuncture plastic straw is provided with scalp syringe needle, the horizontal branch pipe of Medical tee joint pipe is connected with first transformation of the way plastic flexible pipe one end, and the other end of the first transformation of the way plastic flexible pipe stretches to the bottom of wide-mouth reagent bottle through sharp nozzle glass three-way pipe.The speed of reaction is efficiently controlled.
Description
Technical field
The utility model belongs to chemical experiment device technical field, is related to the experimental provision that a kind of acetylene occurs and purified,
More particularly to a kind of experimental provision that can be controlled acetylene generation speed and integrate gas processed and gas washing.
Background technology
The lecture experiment of acetylene is an important infrastest in Middle School Chemistry Textbook '.The experiment, can help student
Understand principle prepared by acetylene, grasp its operating method and the chemical property of acetylene, and it is most important to be actively engaged in Experimental Research.
In terms of the observation ability of training student, manipulative ability and realistic scientism, it may have important effect.
A few set Gao Shi of existing people's religion version senior chemistry new textbook《Experiment of Organic Chemistry》Prepared and property on acetylene in teaching material
The experimental program of matter is primarily present problems with：(1) calcium carbide reacts too violent with saturated nacl aqueous solution, it is difficult to control；(2)
React very exothermic and a large amount of foams, easy obstruction conduit can be produced；(3) produce unstable, uneven acetylene air-flow compared with
Severely impact experiment effect；(4) device is huge, assembles and cumbersome；(5) reagent dosage is more, causes to waste.
Several influential chemistry teaching periodicals of recent year are successively reported mixes ethanol, glacial acetic acid, hydrogen in water
The routine or Microscale experiment method of the materials such as sodium oxide molybdena, sucrose.Though these methods are in terms of control calcium carbide with water reaction speed
It has breakthrough, also simplify experimental provision.But in terms of the systematicness, feature from the illustrative, intuitive and device of experiment
To consider, however it remains some shortcomings.
Utility model content
In order to achieve the above object, the utility model provides the experimental provision that a kind of acetylene occurs and purified, using small
Pin hole drip, forcefully disperse and control the consumption of water, so as to efficiently control the speed of reaction, significantly carry
The high uniformity of acetylene air-flow, stationarity and eliminate other adverse consequences；Separately gas processed and gas washing are dexterously sleeved on
One, it is simple in construction, it is easy to operate.
The utility model the technical scheme adopted is that acetylene occur and purification experimental provision, including wide-mouth reagent bottle,
The bottle mouth position of wide-mouth reagent bottle is provided with 9# rubber stoppers, and one end of the second short body test tube and sharp nozzle glass three-way pipe is respectively inserted into
On 9# rubber stoppers, the first short body test tube is cased with the second short body test tube, 0# rubber stoppers are set in the bottle mouth position of the first short body test tube,
The center of Medical tee joint pipe from 0# rubber stoppers is inserted into the second short body test tube；One end of scalp acupuncture plastic straw is connected to modeling
On the injection port for expecting syringe, the top end opening of the other end from the medical three-way pipe of scalp acupuncture plastic straw is stretched into up to 0# rubber
The lower plug face of plug, the end of the other end of scalp acupuncture plastic straw is provided with scalp syringe needle, is connected with scalp acupuncture plastic straw
Medical tee joint pipe vertical branch pipe upper port at sealed by AB glue；The horizontal branch pipe of Medical tee joint pipe and first transformation of the way are moulded
Material flexible pipe one end is connected, and the first transformation of the way plastic flexible pipe end port burns envelope and 2-3 micropore has been ironed around end port,
The other end of first transformation of the way plastic flexible pipe stretches to the bottom of wide-mouth reagent bottle through sharp nozzle glass three-way pipe；Sharp nozzle glass three-way
The upper port of the vertical branch pipe of pipe is sealed by AB glue.
Further, the described second short body test tube compares the middle position that sharp nozzle glass three-way pipe is inclined to 9# rubber stoppers, and
Second short body test tube upper orifice exposes the top plug face 1cm of 9# rubber stoppers.
Further, cotton layer is set between the described first short body test tube and the second short body test tube inner bottom part.
Further, the needle point of the scalp syringe needle exposes the lower plug face 0.5cm of rubber stopper.
Further, it is provided with the first transformation of the way plastic flexible pipe between the Medical tee joint pipe and sharp nozzle glass three-way pipe
First wheeled folder.
Further, there is spacing, spacing is 2-3mm between the sharp nozzle glass three-way pipe and the first plastic flexible pipe.
Further, the horizontal branch pipe of the sharp nozzle glass three-way pipe connects open-ended plastic flexible pipe, plastic flexible pipe
On be provided with the second wheeled folder, the end of plastic flexible pipe is connected with the sharp nozzle of two-way glass.
Further, the horizontal branch pipe connection end port of the sharp nozzle glass three-way pipe is burnt envelope and ironed around it
Third round formula folder is set on second transformation of the way plastic flexible pipe of 2-3 micropore, the second transformation of the way plastic flexible pipe.
Further, the size of the described first short body test tube is diameter 15mm × length 120mm；The injection of plastic injector
Volume is 2.5mL；The size of second short body test tube is diameter 18mm × length 100mm.
Further, the scalp syringe needle is the scalp syringe needle of 0.45 or 0.55 specification.
The beneficial effects of the utility model are：
1st, employ small pin hole to drip, forcefully having disperseed the consumption of water, (usual dropping funel, which drips, 1 to drip about
For 1/20mL；And the scalp syringe needle of 0.45 and 0.55 specification drip 1 drip respectively may be about 1/180mL and 1/90mL), effectively control
The speed of reaction is made；Uniformity, the stationarity of acetylene air-flow has been significantly increased；So as to reach the observation for being easy to phenomenon
With the purpose of gas collection.In addition, dripped using syringe needle do not result in reaction late phase reaction pipe reclaimed water it is excessive.Therefore, no
Serum can be produced, will not more produce foam (reaction terminate after waste residue only some are moist).
2nd, a kind of compound experiment device for collecting gas processed, gas washing for inside and outside suit has been innovated.Device assembling is simple, operation letter
Just.For there are multiple parallel classes, not only facilitated but also quick using this device.
3rd, the generator of acetylene is done using the first short body test tube of smaller volume, and the second short body test tube for putting it is placed in
In the wide-mouth reagent bottle of gas washing.Plenum space is reduced, the emptying time of acetylene gas is shortened, so that experimental period is shortened,
Improve conventional efficient.
4th, sealed by the way that plastic flexible pipe lower port is burnt, separately iron 2-3 micropore with the red needle point of burning around it, be made the
One transformation of the way plastic flexible pipe and the second transformation of the way plastic flexible pipe, are deflated by micropore, improve the degree of scatter of acetylene gas, add second
Alkynes gas and washing lotion or the contact area of reaction solution, so as to improve purification and the utilizing status of acetylene.
5th, device is exquisite, attractive in appearance, and globality is strong, and feature is strong.To training student learning interest, students intelligence is developed, is carried
High creativity consciousness is very helpful.If to the utility model slight changes, it may also be used for other to occur gas based on solid-liquid reaction
Experiment, such as oxygen, hydrogen, carbon dioxide, the experiment of hydrogen sulfide gas；With wide applicability.
6th, the assembling of device can utilize Biohazard Waste Disposal.In addition, completing lecture experiment or the student of acetylene using the device
During experiment, reagent dosage is few, and experimental phenomena is obvious；Gas scrubbing is good, free from environmental pollution.This improves religion to reduction experimental cost
Learn quality and infiltration environmental protection education is of great advantage.
Brief description of the drawings
, below will be to embodiment in order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art
Or the accompanying drawing used required in description of the prior art is briefly described, it should be apparent that, drawings in the following description are only
It is some embodiments of the present utility model, for those of ordinary skill in the art, is not paying the premise of creative work
Under, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is the experimental provision structural representation that the utility model embodiment acetylene occurs and purified.
Fig. 2 is the structural representation of the second plastic flexible pipe part of the utility model embodiment.
Fig. 3 is the structural representation of the sharp nozzle of two-way glass of the utility model embodiment.
Fig. 4 is the schematic enlarged-scale view of the utility model embodiment Medical tee joint pipe and sharp nozzle threeway tube portion.
In figure, 1. wide-mouth reagent bottles；2. the first short body test tube；3. Medical tee joint pipe；4. scalp syringe needle；5.0# rubber stopper；
6. scalp acupuncture plastic straw；7. plastic injector；8. the second short body test tube；9. sharp nozzle glass three-way pipe；10.9# rubber stoppers；11.
First transformation of the way plastic flexible pipe；12. plastic flexible pipe；13. the first wheeled folder；14. the second wheeled folder；15.AB glue；16. second transformation of the way
Plastic flexible pipe；17. the sharp nozzle of two-way glass；18. third round formula is pressed from both sides；19. distilled water, 20. copper-baths, 21. calcium carbides.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is carried out
Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of the utility model, rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not under the premise of creative work is made
The every other embodiment obtained, belongs to the scope of the utility model protection.
The utility model embodiment acetylene occur and purification experimental provision structure as Figure 1-4, including wide-mouth examination
Agent bottle 1, the bottle mouth position of wide-mouth reagent bottle 1 is provided with 9# rubber stoppers 10, the second short body test tube 8 and the one of sharp nozzle glass three-way pipe 9
End is respectively inserted on 9# rubber stoppers 10, and the second short body test tube 8 compares the center of the sharp deviation 9# of nozzle glass three-way pipe 9 rubber stoppers 10
Position, and the second short upper orifice of body test tube 8 exposes the top plug face 1cm of 9# rubber stoppers 10；It is short that first is cased with second short body test tube 8
Cotton layer can be set between body test tube 2, the first short short inner bottom part of body test tube 8 of body test tube 2 and second；In the first short body test tube 2
Bottle mouth position 0# rubber stoppers 5 are set, the center of Medical tee joint pipe 3 from 0# rubber stoppers 5 is inserted into the second short body test tube 8；Head
One end of sword-shaped needle plastic straw 6 is connected on the injection port of plastic injector 7, and the other end of scalp acupuncture plastic straw 6 is from medical
The top end opening of three-way pipe 3 stretches into the lower plug face until 0# rubber stoppers 5, and the end of the other end of scalp acupuncture plastic straw 6 is set
Scalp syringe needle 4 is equipped with, the needle point of scalp syringe needle 4 exposes the lower plug face 0.5cm of rubber stopper 5, in order to observe and control water droplet；With
Sealed at the upper port of the vertical branch pipe for the Medical tee joint pipe 3 that scalp acupuncture plastic straw 6 is connected by AB glue 15；Medical tee joint pipe
3 horizontal branch pipe is connected with first transformation of the way plastic flexible pipe 11 one end, and the other end of the first transformation of the way plastic flexible pipe 11 passes through sharp nozzle
Glass three-way pipe 9 stretches to the bottom of wide-mouth reagent bottle 1；First between Medical tee joint pipe 3 and sharp nozzle glass three-way pipe 9 changes
The first wheeled folder 13 is provided with plastic flexible pipe 11 processed；There is spacing between sharp nozzle glass three-way pipe 9 and the first plastic flexible pipe 11,
Spacing is 2-3mm, and the upper port of the vertical branch pipe of sharp nozzle glass three-way pipe 9 is sealed by AB glue 15；Sharp nozzle glass three-way pipe 9
Horizontal branch pipe can connect two kinds of flexible pipes, and one kind is to be provided with the second wheel on open-ended plastic flexible pipe 12, plastic flexible pipe 12
Formula folder 14, the end of plastic flexible pipe 12 is connected with the sharp nozzle 17 of two-way glass；Another is that end port is burnt envelope and ironed around it
Have and third round formula folder 18 is set on the second transformation of the way plastic flexible pipe 16 of 2-3 micropore, the second transformation of the way plastic flexible pipe 16.
The size of first short body test tube 2 is diameter 15mm × length 120mm；The volume injected of plastic injector 7 is
2.5mL；The size of second short body test tube 8 is diameter 18mm × length 100mm.
Medical tee joint pipe 3 is securely fixed on the top plug face of 0# rubber stoppers 5 by AB glue 15.First transformation of the way plastics are soft
The contact position of pipe 11 and the vertical branch pipe upper orifice of sharp nozzle glass three-way pipe 9 passes through the seal of AB glue 15 and fixation.
The Kong Weishi holes of Medical tee joint pipe 3 are inserted on 0# rubber stoppers 5, with the red crude iron silk of burningTermination, which is burnt, to be ironed
Arrive.The hole that the second short body test tube 8 is inserted on 9# rubber stoppers 10 is super big hole, it is necessary to which substep is completed.The first step, it is existing with laboratory
Some maximum number card punch, the circular hole for the bore 15mm that drills；Twined on the glass tube (rod) that second step is about 10mm in diameter
Around upper a few circle 120# emery cloth, careful polishing, reaming are then inserted into hole.Until hole diffuses into the second short energy of body test tube 8 tightly
Untill tightly inserting in it.
The first short body test tube 8 of short body test tube 2 and second, can be using extension patterning method, respectively from the thick commercially available length of same specification
Cut is produced on body test tube.Port is polished smooth with 120# emery cloth.
The root plastic envelope of scalp syringe needle 4 need to be polished smooth with small file, and become thinner (2mm), so as to the root of syringe needle
Portion can be also deep into the passage of vertical branch pipe of Medical tee joint pipe 3.
It is vertical beyond 2cm length below vertical manifold portion and the horizontal branch pipe more than horizontal branch pipe of Medical tee joint pipe 3
Manifold portion need to be cut, to ensure that (Medical tee joint pipe VERTICAL TUBE is about 6mm to the effect that penetrates of scalp syringe needle 4, and syringe needle is about
3mm)。
First transformation of the way plastic flexible pipe 11 and second changes a social system the way of plastic flexible pipe 16：The lower port of plastic flexible pipe is burnt into envelope,
Separately 2-3 micropore is ironed around it with the red small needle point of burning.
Medical tee joint pipe 3 uses it in experimental provision, can play a part of reducing punching and simplify device.Medical tee joint
Pipe volume is smaller, and aperture is thinner, is adapted on 0-3# plugs be connected with thinner pipe (such as scalp acupuncture tubule) and supports the use, often
For microscale chemical experiment apparatus.9 volumes of sharp nozzle glass three-way pipe are larger, and aperture is thicker, are adapted in 4# with top cement plug and thicker
Emulsion tube or plastic flexible pipe connection are supported the use, and are usually used in normal experiment device.
The sharp bottle neck point of the sharp nozzle 17 of two-way glass and sharp nozzle glass three-way pipe 9 fuses drawing, and its sharp nozzle bore is about
3mm, so as to being inserted in for plastic flexible pipe.
Laboratory operating procedures are as follows：
1) air-tightness is checked
The first wheeled folder 14 of wheeled folder 13 and second is opened, and the piston of plastic injector 7 is drawn out at maximum scale.So
About 50mL distilled water 19 is injected in backward wide-mouth reagent bottle 1, and stoppers 0# rubber stoppers 5 and 9# rubber stoppers 10.Promote at leisure
The piston of plastic injector 7, if can see has uniform minute bubbles from the first plastic flexible pipe 11 of underwater in wide-mouth reagent bottle 1
Emerged in the micropore at lower mouth end, illustrate that the generator part of acetylene is air tight, air-tightness is good；Plastic flexible pipe 12 is inserted one again
In the small beaker being only filled with water, continue propelling piston, if can see has uniform bubble to be emerged from the lower mouth end of plastic flexible pipe 12, say
The purifier part of bright acetylene is air tight, and air-tightness is good.After the two is air tight, you can carry out the property examination of following acetylene
Test.
2) reagent is loaded
(1) 9# rubber stoppers 10 are opened, the distilled water in wide-mouth reagent bottle 1 is poured out；By about 150mL 1mol.L-1Copper sulphate
Solution 20 injects wherein, and stoppers 9# rubber stoppers 10.
(2) 0# rubber stoppers 5 are opened, the first short body test tube 2 is taken out, several small piece of calcium carbide 21 (being advisable with 2-3g) is put into it
In.Then first short body test tube 2 be carefully refitted in the second short body test tube 8 to (cotton of the second short bottom of body test tube 8 rises anti-
The effect of touching), and stopper 0# rubber stoppers 5.
(3) joint of plastic injector 7 from scalp acupuncture plastic straw 6 is removed, is filled about 4mL water；Emptying air
Afterwards, reinstall on scalp acupuncture plastic straw 6.
3) gas processed and gas is taken
Promote the piston of plastic injector 7 at leisure, allow water drop by drop drip at leisure (with the scalp acupuncture of 0.55 specification,
It is advisable with 0.5-1d/s；With the scalp acupuncture of 0.45 specification, it is advisable with 1-2d/s).It can be seen that having in wide-mouth reagent bottle 1 uniform
Acetylene bubble is emerged under liquid level.About one minute, after estimation air emptying, you can take gas to carry out the property test of acetylene.If doing
During the combustion test of acetylene, the sharp nozzle 17 of two-way glass can be directly nested on plastic flexible pipe 12, light and (can note in sharp nozzle mouthful
Meaning tests pure before lighting)., can be by plastics if do the reaction of the acid solution of acetylene and potassium permanganate or the carbon tetrachloride solution of bromine
Flexible pipe 12 changes the second transformation of the way plastic flexible pipe 16 into, is passed directly in above-mentioned solution.
4) end is with even doing
After the completion of experiment, stop dripping immediately.Loose 0# rubber stoppers 5 are pulled out, and it is wheeled to close the first wheeled folder 13, second immediately
Folder 14.Then 0# rubber stoppers 5 are pulled out, the reaction residues in it are removed (if either with or without the remaining block calcium carbide reacted, noting
Reclaim and preserve), for future use.
The class that imparted knowledge to students when one finishes experiment, goes to next teaching class and carries out even when testing, it is only necessary to repeats following operation：
(1) 0# rubber stoppers 5 are opened, the first short body test tube 2 is taken out, several small piece of calcium carbide (being advisable with 2-3g) is put into wherein.
Then the first short body test tube 2 will be carefully refitted in short body test tube 8, and 0# rubber stoppers 5 will lightly be put into the mouth of pipe.
(2) drop by drop dripped at leisure into the first short body test tube 2, that is, have acetylene gas generation.10 seconds are about spent, estimation the
In two short body test tubes 8 after air emptying, stop dripping, 0# rubber stoppers 5 are stoppered rapidly, and quickly open the first wheeled folder 13.
(3) plastic flexible pipe 12 is inserted in the water in beaker, then opens the second wheeled folder 14 at leisure (to prevent wide-mouth reagent
It is negative pressure in bottle, and allows air to invade)；Then piston is promoted to supply water.When there is bubble to emerge in beaker, you can take gas to carry out second
The property test of alkynes.
By above-mentioned, it will be seen that using the device, for multiple parallel classes, more seem convenient, fast and peace
Entirely.First, the copper-bath loaded in wide-mouth reagent bottle is sufficient, it is not required to change；Second, when even doing, the emptying time of device
Very short, derived acetylene gas is pure acetylene gas at the beginning.Therefore, experimental period is shortened, the profit of acetylene is improved
With rate, it is ensured that the security that acetylene is lighted.
Each embodiment in this specification is described by the way of related, identical similar portion between each embodiment
Divide mutually referring to what each embodiment was stressed is the difference with other embodiment.
Preferred embodiment of the present utility model is the foregoing is only, protection model of the present utility model is not intended to limit
Enclose.All any modification, equivalent substitution and improvements made within spirit of the present utility model and principle etc., are all contained in this reality
With in new protection domain.
Claims (10)
1. the experimental provision that acetylene occurs and purified, it is characterised in that including wide-mouth reagent bottle (1), the bottle of wide-mouth reagent bottle (1)
9# rubber stoppers (10) are provided with mouthful, and one end of the second short body test tube (8) and point nozzle glass three-way pipe (9) is respectively inserted into 9# rubbers
On plug (10), the first short body test tube (2) is cased with the second short body test tube (8), is set in the bottle mouth position of the first short body test tube (2)
0# rubber stoppers (5), the center of Medical tee joint pipe (3) from 0# rubber stoppers (5) is inserted into the second short body test tube (8)；Scalp acupuncture
One end of plastic straw (6) is connected on the injection port of plastic injector (7), and the other end of scalp acupuncture plastic straw (6) is taken up a job as a doctor
The lower plug face until 0# rubber stoppers (5) is stretched into the top end opening of three-way pipe (3), the other end of scalp acupuncture plastic straw (6)
End is provided with scalp syringe needle (4), the vertical branch pipe for the Medical tee joint pipe (3) being connected with scalp acupuncture plastic straw (6) it is upper
Port is sealed by AB glue (15)；The horizontal branch pipe of Medical tee joint pipe (3) is connected with first transformation of the way plastic flexible pipe (11) one end
Connect, first transformation of the way plastic flexible pipe (11) end port burns envelope and 2-3 micropore has been ironed around end port, the first transformation of the way modeling
The other end of material flexible pipe (11) stretches to the bottom of wide-mouth reagent bottle (1) through sharp nozzle glass three-way pipe (9)；The sharp nozzle glass
The upper port of the vertical branch pipe of three-way pipe (9) is sealed by AB glue (15).
2. the experimental provision that acetylene according to claim 1 occurs and purified, it is characterised in that the second short body test tube
(8) middle position of sharp nozzle glass three-way pipe (9) deviation 9# rubber stoppers (10), and the second short body test tube (8) upper orifice dew are compared
Go out the top plug face 1cm of 9# rubber stoppers (10).
3. the experimental provision that acetylene according to claim 1 occurs and purified, it is characterised in that the first short body test tube
(2) cotton layer is set between the second short body test tube (8) inner bottom part.
4. the experimental provision that acetylene according to claim 1 occurs and purified, it is characterised in that the scalp syringe needle (4)
Needle point expose the lower plug face 0.5cm of rubber stopper (5).
5. the experimental provision that acetylene according to claim 1 occurs and purified, it is characterised in that the Medical tee joint pipe
(3) it is provided with the first wheeled folder (13) on the first transformation of the way plastic flexible pipe (11) between sharp nozzle glass three-way pipe (9).
6. the experimental provision that acetylene according to claim 1 occurs and purified, it is characterised in that the sharp nozzle glass three-way
Managing has spacing between (9) and the first plastic flexible pipe (11), spacing is 2-3mm.
7. the experimental provision that acetylene according to claim 1 occurs and purified, it is characterised in that the sharp nozzle glass three-way
Manage and be provided with the second wheeled folder (14) on the open-ended plastic flexible pipe (12) of horizontal branch pipe connection of (9), plastic flexible pipe (12),
The end of plastic flexible pipe (12) is connected with the sharp nozzle (17) of two-way glass.
8. the experimental provision that acetylene according to claim 1 occurs and purified, it is characterised in that the sharp nozzle glass three-way
The horizontal branch pipe connection end port of pipe (9) burns envelope and the second transformation of the way plastic flexible pipe of 2-3 micropore is ironed around it
(16) third round formula folder (18), is set on the second transformation of the way plastic flexible pipe (16).
9. the experimental provision that acetylene according to claim 1 occurs and purified, it is characterised in that the first short body test tube
(2) size is diameter 15mm × length 120mm；The volume injected of plastic injector (7) is 2.5mL；Second short body test tube (8)
Size be diameter 18mm × length 100mm.
10. the experimental provision that acetylene according to claim 1 occurs and purified, it is characterised in that the scalp syringe needle (4)
For the scalp syringe needle of 0.45 or 0.55 specification.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720123950.2U CN206471034U (en) | 2017-02-10 | 2017-02-10 | The experimental provision that acetylene occurs and purified |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720123950.2U CN206471034U (en) | 2017-02-10 | 2017-02-10 | The experimental provision that acetylene occurs and purified |
Publications (1)
| Publication Number | Publication Date |
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| CN206471034U true CN206471034U (en) | 2017-09-05 |
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ID=59703195
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| Application Number | Title | Priority Date | Filing Date |
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| CN201720123950.2U Expired - Fee Related CN206471034U (en) | 2017-02-10 | 2017-02-10 | The experimental provision that acetylene occurs and purified |
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| Country | Link |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111681517A (en) * | 2018-09-21 | 2020-09-18 | 河南大学 | Experimental apparatus for psychology |
-
2017
- 2017-02-10 CN CN201720123950.2U patent/CN206471034U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111681517A (en) * | 2018-09-21 | 2020-09-18 | 河南大学 | Experimental apparatus for psychology |
| CN111681517B (en) * | 2018-09-21 | 2021-10-26 | 河南大学 | Experimental apparatus for psychology |
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Granted publication date: 20170905 Termination date: 20180210 |