CN202268113U - Constant-pressure meter - Google Patents
Constant-pressure meter Download PDFInfo
- Publication number
- CN202268113U CN202268113U CN2011204009204U CN201120400920U CN202268113U CN 202268113 U CN202268113 U CN 202268113U CN 2011204009204 U CN2011204009204 U CN 2011204009204U CN 201120400920 U CN201120400920 U CN 201120400920U CN 202268113 U CN202268113 U CN 202268113U
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- Prior art keywords
- vertical tube
- bend
- standpipe
- bend pipe
- constant
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model belongs to a lab apparatus and in particular relates to a constant-pressure meter used for a liquid saturated steam pressure measurement device. The constant-pressure meter comprises a first standpipe (21), a second standpipe (22) and a third standpipe (23), wherein the first standpipe (21) is connected with the second standpipe (22) through a first bend (24); the second standpipe (22) is connected with the third standpipe (23) through a second bend (25); the pipe diameter of the top end of the second bend (25) is less than the pipe diameter of other parts of the second bend (25); and the middle part of the second bend (25) is of a horn structure (27) which is small at the middle part and is big at the two ends. The constant-pressure meter is simple in structure and is convenient to operate; and probability of a flow-backward phenomenon of the constant-pressure meter can be reduced.
Description
Technical field
The utility model belongs to Laboratory Instruments, particularly a kind of equipressure meter that is used for hold-up vapour-pressure test device.
Background technology
The saturated vapour pressure of pure material is meant at a certain temperature, the pressure of steam during the gas-liquid two-phase balance.The device of measuring the hold-up vapour pressure in the laboratory comprises calibration cell, numerical pressure table, air pump, and isobaric meter is set in the calibration cell, and the upper end of isobaric meter connects condenser pipe, and condenser pipe is communicated with numerical pressure table and air pump through conduit.Isobaric meter of the prior art is as shown in Figure 1; Comprise first vertical tube (21), second vertical tube (22), the 3rd vertical tube (23); Be connected through first bend pipe (24) between first vertical tube (21) and second vertical tube (22), be connected through second bend pipe (25) between second vertical tube (22) and the 3rd vertical tube (23).During experiment, earlier ethanol (26) is joined in the isobaric meter, make in the 3rd vertical tube (23) and first bend pipe (24) and respectively stay one section ethanol (26), guarantee that the space between the 3rd vertical tube (23) and first bend pipe (24) has only ethanol (26) steam.If ethanol (26) left and right sides liquid level that first bend pipe (24) is located is equal; Then the saturated vapour pressure of the ethanol (26) between the 3rd vertical tube (23) and first bend pipe (24) equates with the pressure of ethanol (26) top in first vertical tube (21); The pressure of ethanol (26) top can be recorded by the numerical pressure table in first vertical tube (21), and the numerical value that records is the saturated vapour pressure of ethanol (26) just.Ethanol (26) left and right sides liquid level that first bend pipe (24) is located need be regulated through the air pump air feed; The student is when experiment; Because the air feed speed of the bad air pump of control; Thereby the ethanol (26) of first bend pipe (24) is flushed to the 3rd vertical tube (23) easily combines together with the ethanol (26) of the 3rd vertical tube (23), causes the failure of experiment, and this phenomenon is commonly called as pours in down a chimney.After occurring pouring in down a chimney, need take off the equipressure meter and make ethanol (26) be divided into two sections, troublesome poeration again.If isobaric meter itself just is in heated condition in calibration cell, then deal with loaded down with trivial details especially.
The utility model content
The purpose of the utility model provides the equipressure meter that the phenomenon occurrence probability is poured in down a chimney in a kind of minimizing.
The scheme that the utility model solve the technical problem is: a kind of isobaric meter; Comprise first vertical tube, second vertical tube, the 3rd vertical tube; Be connected through first bend pipe between first vertical tube and second vertical tube; Be connected through second bend pipe between second vertical tube and the 3rd vertical tube, the caliber of the top end of said second bend pipe is less than the caliber of second other parts of bend pipe, the big horn-like structure in little two in the middle of the middle part of second bend pipe is.
The student is when operation; In case the air feed excessive velocities of air pump; The liquid of first bend can be pressed onto second bend by pressure, because the caliber of the top end of second bend pipe is less than the caliber of second other parts of bend pipe, and the big horn-like structure in little two in the middle of the middle part of second bend pipe is; The liquid that is forced into second bend is not easy the top end through the less caliber of second bend pipe, has reduced the probability that pours in down a chimney phenomenon.Just in case have partially liq to pass through the top end of less caliber, because the liquid of first bend does not have fully and the liquid mixing at the 3rd vertical tube place, experiment can also be proceeded.
As further technical scheme, between the said horn-like structure and second vertical tube arm is set.
Because between the horn-like structure and second vertical tube arm is set, the liquid that is forced into the second bend pipe top end can arrive second vertical tube along arm and return first bend, has further reduced the probability that pours in down a chimney phenomenon.
The utility model is simple in structure, easy to operate, can reduce isobaric meter and pour in down a chimney the probability of phenomenon.
Description of drawings
Fig. 1 is the structural representation of isobaric meter in the prior art;
Fig. 2 is the structural representation of the utility model;
Fig. 3 is the utility model synoptic diagram in use.
Embodiment
As shown in Figure 2; A kind of isobaric meter comprises between first vertical tube 21, second vertical tube 22, the 3rd vertical tube 23, the first vertical tubes 21 and second vertical tube 22 being connected through first bend pipe 24; Be connected through second bend pipe 25 between second vertical tube 22 and the 3rd vertical tube 23; The caliber of the top end of second bend pipe 25 is less than the caliber of second bend pipe, 25 other parts, and the big horn-like structure 27 in little two in the middle of the middle part of second bend pipe 25 is is provided with arm 28 between the horn-like structure 27 and second vertical tube 22.
Isobaric meter is as shown in Figure 3 in use, comprises that the package unit of isobaric meter is called hold-up vapour-pressure test device, and hold-up vapour-pressure test device also comprises calibration cell 1, numerical pressure table 3 and air pump 4.Isobaric meter, thermometer 6 and stirrer 7 are set in the calibration cell 1, and the upper end of first vertical tube 21 of isobaric meter connects condenser pipe 5, and condenser pipe 5 is communicated with numerical pressure table 3 and air pump 4 through conduit 8.
Claims (2)
1. an equipressure is counted; Comprise first vertical tube (21), second vertical tube (22), the 3rd vertical tube (23); Be connected through first bend pipe (24) between first vertical tube (21) and second vertical tube (22); Be connected through second bend pipe (25) between second vertical tube (22) and the 3rd vertical tube (23), it is characterized in that: the caliber of the top end of said second bend pipe (25) is less than the caliber of other parts of second bend pipe (25), the big horn-like structure (27) in little two in the middle of the middle part of second bend pipe (25) is.
2. a kind of isobaric meter as claimed in claim 1 is characterized in that: between said horn-like structure (27) and second vertical tube (22) arm (28) is set.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204009204U CN202268113U (en) | 2011-10-20 | 2011-10-20 | Constant-pressure meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204009204U CN202268113U (en) | 2011-10-20 | 2011-10-20 | Constant-pressure meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202268113U true CN202268113U (en) | 2012-06-06 |
Family
ID=46158898
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204009204U Expired - Fee Related CN202268113U (en) | 2011-10-20 | 2011-10-20 | Constant-pressure meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202268113U (en) |
-
2011
- 2011-10-20 CN CN2011204009204U patent/CN202268113U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120606 Termination date: 20121020 |