CN204373834U - Wall-hanging micro-pressure-difference measurement mechanism - Google Patents
Wall-hanging micro-pressure-difference measurement mechanism Download PDFInfo
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- CN204373834U CN204373834U CN201420860336.0U CN201420860336U CN204373834U CN 204373834 U CN204373834 U CN 204373834U CN 201420860336 U CN201420860336 U CN 201420860336U CN 204373834 U CN204373834 U CN 204373834U
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Abstract
The utility model discloses a kind of wall-hanging micro-pressure-difference measurement mechanism, comprise tank (1) and piezometric tube (2), also comprise wall hanging board (3) and the framework (4) of vertical placement, tank (1) and piezometric tube (2) are fixed in framework (4), the bottom of tank (1) is parallel with the lower frame (42) of framework (4), the level meter (5) parallel with upper side frame (41) is also fixed with at the upper side frame (41) of framework (4), also comprise stationary shaft (6) and level-off mechanism (7), stationary shaft (6) is vertical with described wall hanging board (3), and one end of stationary shaft (6) is fixedly connected with wall hanging board (3), level-off mechanism (7) part is connected with wall hanging board (3), another part is connected with framework (4), and this one end of framework (4) can be made to move up and down.Micro-pressure-difference measurement mechanism of the present utility model, installation is placed conveniently, measuring accuracy is high, simple and efficient to handle.
Description
Technical field
The utility model belongs to device for pressure measurement technical field, the wall-hanging micro-pressure-difference measurement mechanism that particularly a kind of measuring accuracy is high, simple and efficient to handle.
Background technology
For the engineering having tight requirements, as civil air defense constructions and installations, need the air pressure difference measuring a lot of position, as: for ensureing the superpressure value in engineering, need to arrange differential pressure measurement device at three anti-duty rooms, one end communicates with superpressure testing tube, and the other end communicates with indoor; For monitoring the filtration resistance of strainer filter, differential pressure measurement device need be set at straining chamber, air pressure difference before and after monitoring strainer filter, to determine whether cleaning or to change strainer filter.And sometimes need the pressure difference of measurement often very little extremely important, high to accuracy requirement.As civil air defense constructions and installations superpressure value is not more than 100Pa.
At present, normally U-tube differential manometer is set in the interior walls of three anti-duty rooms, with monitoring works superpressure value.The reason of such setting is that wall-hanging differential manometer does not take the interior space, safe and reliable, but due to engineering superpressure value very little, be reacted in the fluid column difference of U-tube differential manometer, cause measuring error very large, cannot request for utilization be met.As the pressure reduction of maximal value just 100Pa, react the discrepancy in elevation only having 10mm water column on U-tube differential manometer, the reading error that naked eyes are difficult to the 1mm differentiated is exactly 10Pa, i.e. error 10%, like this error be unacceptable.
For measuring little pressure reduction, also tilting micromanometer can be used, as shown in Figure 1, it comprises the piezometric tube that tank and end opening communicate with bottom of gullet, tank horizontal sectional area is much larger than piezometric tube horizontal sectional area, tank top seal, only stay an external connected entrance, tank top connected entrance and piezometric tube all can receive survey gas.In order to improve sensitivity, reduce reading error, the axis of piezometric tube in vertical direction with being greater than the oblique angle that 0 degree is less than 90 degree, to elongate fluid column.Its measuring principle can be expressed from the next:
L/h＝(sinα+A2/A1)
-1，
In Fig. 1 and above formula,
L---reading scale divisions,
H---level change overall height,
α---inclined tube and horizontal plane angle,
A2---inclined tube sectional area,
A1---cup type linker sectional area,
As can be seen from the above equation, delta pressure readings is exaggerated (sin α+A2/A by it
1)
-1if A2 < < A1, then liquid-column height is exaggerated 1/sin α doubly, and α angle is less, and enlargement factor is larger.Therefore this pressure gauge is particularly suitable for measuring very low pressure.
But owing to will adjust wide saliva groove levelness and the zeroing of piezometric tube scale before tilting micromanometer use, complicated operation, reading is comparatively slow, can not meet the requirement of rapid pressure adjusting; And its volume greatly, also must possess mounting platform, the restriction in use by levelling of the land degree is very large, and the scope that returns to zero is little, and the positions such as multidirectional valve are often generation leakage and blocking also, operation, use complexity.
Therefore, prior art Problems existing: micro-pressure-difference measurement mechanism is installed, use inconvenience, is difficult to the request for utilization of satisfied quick, easy monitoring slight pressure difference.
Summary of the invention
The purpose of this utility model is to provide a kind of wall-hanging micro-pressure-difference measurement mechanism, and placement is convenient, measuring accuracy is high, simple and efficient to handle.
The technical solution realizing the utility model object is: a kind of wall-hanging micro-pressure-difference measurement mechanism, comprise the piezometric tube that tank and end opening communicate with bottom of gullet, the axis of piezometric tube is in vertical direction with acute angle, also comprise wall hanging board and the framework of vertical placement, described framework place plane is parallel with wall hanging board, , described wall hanging board is parallel to the projection plane of surface level with piezometric tube, described framework comprises the upper side frame and lower frame that are parallel to each other, described tank and piezometric tube are fixedly installed in framework, and the bottom of tank is parallel with the lower frame of framework, the level meter parallel with upper side frame is also fixed with at the upper side frame of described framework, described level meter is parallel with wall hanging board, also comprise stationary shaft and level-off mechanism, described stationary shaft is vertical with described wall hanging board, and one end of stationary shaft is fixedly connected with wall hanging board, described framework (4) can a bit turning at the plane internal rotation parallel with wall hanging board (3) on wall hanging board (3).
The utility model compared with prior art, its remarkable advantage:
1, measuring accuracy is high: the amplification principle making full use of tilting micromanometer, and regulates accurately simple, thus can obtain higher measuring accuracy;
2, simple and efficient to handle: to carry level meter, apparatus installation leveling is simple and efficient;
3, placement is installed convenient: adopt wall hanging board to fix whole device, can hang on wall by whole measurement mechanism easily, not need other installing space, conveniently place.
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
Accompanying drawing explanation
Fig. 1 is existing tilting micromanometer structural representation.
Fig. 2 is the utility model wall-hanging micro-pressure-difference measurement mechanism structural representation.
In figure, 1 tank, 2 piezometric tube, 3 wall hanging boards, 4 frameworks, 41 framework upper side frames, 42 framework lower frames, 5 level meters, 6 stationary shaft, 7 level-off mechanisms, 71 fixed legs, 72 adjusting bolts, 8 scales, 9 fluid reservoirs.
Embodiment
As shown in Figure 2, the wall-hanging micro-pressure-difference measurement mechanism of the utility model, comprise the piezometric tube 2 that tank 1 and end opening communicate with bottom of gullet, the axis of piezometric tube is in vertical direction with acute angle, also comprise wall hanging board 3 and the framework 4 of vertical placement, described framework 4 place plane is parallel with wall hanging board 3, described wall hanging board 3 is parallel to the projection plane of surface level with piezometric tube 2, described framework 4 comprises the upper side frame 41 and lower frame 42 that are parallel to each other, described tank 1 and piezometric tube 2 are fixedly installed in framework 4, and the bottom of tank 1 is parallel with the lower frame 42 of framework 4, the level meter 5 parallel with upper side frame 41 is also fixed with at the upper side frame 41 of described framework 4, described level meter 5 is parallel with wall hanging board 3, described framework 4 can a bit turning at the plane internal rotation parallel with wall hanging board 3 on wall hanging board 3.
Described framework 4 can turn can realize like this at the plane internal rotation parallel with wall hanging board 3 along any on wall hanging board 3: also comprise stationary shaft 6 and level-off mechanism 7, described stationary shaft 6 is vertical with described wall hanging board 3, and one end of stationary shaft 6 is fixedly connected with wall hanging board 3, the other end through framework 4 and with framework 4 loose fit, described level-off mechanism 7 part is connected with wall hanging board 3, another part is connected with framework 4, and framework 4 can be made to turn at the plane internal rotation parallel with wall hanging board 3 around stationary shaft 6.
Instrument first wants level-off, and only have instrument when level, reading is only accurately.Instrument carries level meter, ensures that instrument is correctly installed; Connect between instrument to measuring point, select internal diameter to be proofed sleeve or the soft plastics pipe of 10mm.When measurement gas is malleation, connecting pipe is connected on the high-pressure side of instrument, and allows low pressure end lead to air, reading is malleation value.When measurement gas is negative pressure, connection rubber tube one end is connected to low pressure end, and high-pressure side is led to air, reading is negative pressure value.When measurement gas 2 pressure reduction, then connect sebific duct respectively at high pressure, low pressure two ends, be connected with high-low pressure two measuring points respectively, reading is pressure reduction.Inclination microbarograph can replace U-tube differential manometer in a lot of occasion, measuring accuracy is high, economy and durability, easy to operate, save space, all kinds of places of air micro pressure measuring can be widely used in.
Also comprise scale 8, described scale 8 is axially arranged along piezometric tube 2, and can move axially along piezometric tube 2.
Scale 8 can move axially along piezometric tube 2, facilitates adjust zero point, makes operation simply faster.
Described level-off mechanism 7 comprises fixed leg 71 and adjusting bolt 72, described fixed leg 71 is vertical with described wall hanging board 3, one end is fixedly connected with wall hanging board 3, the other end is outstanding to framework 4 direction, described adjusting bolt 72 is parallel with described wall hanging board 3, and straight down through described framework 4 upper side frame 41, its lower end contacts with described fixed leg 71, described adjusting bolt 72 and described framework 4 upper side frame 41 threaded engagement.
The level-off mechanism 7 of this kind of structure, simple and reliable for structure, easy to adjust, be convenient to device and correctly install.
Also comprise a fluid reservoir 9, be connected with the suitable for reading of described piezometric tube bottom described fluid reservoir 9.Such structure can prevent maloperation from causing measurement liquid to overflow from piezometric tube.
The most handy organic glass of described tank 1, piezometric tube 2, framework 4 and scale 8 makes, and is convenient to reading.The indicator solution of splendid attire in tank 1, piezometric tube 2 adopts not volatile and density (0.87) is oily lower than the red meter specially of water, to improve precision and to be convenient to reading.
Claims (5)
1. a wall-hanging micro-pressure-difference measurement mechanism, comprise the piezometric tube (2) that tank (1) and end opening communicate with bottom of gullet, the axis of piezometric tube is in vertical direction with acute angle, it is characterized in that: the wall hanging board (3) and the framework (4) that also comprise vertical placement, described framework (4) place plane is parallel with wall hanging board (3), described wall hanging board (3) is parallel to the projection plane of surface level with piezometric tube (2), described framework (4) comprises the upper side frame (41) and lower frame (42) that are parallel to each other, described tank (1) and piezometric tube (2) are fixedly installed in framework (4), and the bottom of tank (1) is parallel with the lower frame (42) of framework (4), the level meter (5) parallel with upper side frame (41) is also fixed with at the upper side frame (41) of described framework (4), described level meter (5) is parallel with wall hanging board (3), described framework (4) can a bit turning at the plane internal rotation parallel with wall hanging board (3) on wall hanging board (3).
2. wall-hanging micro-pressure-difference measurement mechanism according to claim 1, it is characterized in that, described framework (4) can be achieved in that and also comprises stationary shaft (6) and level-off mechanism (7) along a bit turning at the plane internal rotation parallel with wall hanging board (3) on wall hanging board (3), described stationary shaft (6) is vertical with described wall hanging board (3), and one end of stationary shaft (6) is fixedly connected with wall hanging board (3), the other end through framework (4) and with framework (4) loose fit, described level-off mechanism (7) part is connected with wall hanging board (3), another part is connected with framework (4), and framework (4) can be made to turn at the plane internal rotation parallel with wall hanging board (3) around stationary shaft (6).
3. wall-hanging micro-pressure-difference measurement mechanism according to claim 2, it is characterized in that: also comprise scale (8), described scale (8) is axially arranged along piezometric tube (2), and can move axially along piezometric tube (2).
4. the wall-hanging micro-pressure-difference measurement mechanism according to Claims 2 or 3, it is characterized in that: described level-off mechanism (7) comprises fixed leg (71) and adjusting bolt (72), described fixed leg (71) is vertical with described wall hanging board (3), one end is fixedly connected with wall hanging board (3), the other end is outstanding to framework (4) direction, described adjusting bolt (72) is parallel with described wall hanging board (3), and straight down through described framework (4) upper side frame (41), its lower end contacts with described fixed leg (71), described adjusting bolt (72) and described framework (4) upper side frame (41) threaded engagement.
5. wall-hanging micro-pressure-difference measurement mechanism according to claim 4, is characterized in that: also comprise a fluid reservoir (9), and described fluid reservoir (9) bottom is connected with the suitable for reading of described piezometric tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420860336.0U CN204373834U (en) | 2014-12-30 | 2014-12-30 | Wall-hanging micro-pressure-difference measurement mechanism |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420860336.0U CN204373834U (en) | 2014-12-30 | 2014-12-30 | Wall-hanging micro-pressure-difference measurement mechanism |
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| CN204373834U true CN204373834U (en) | 2015-06-03 |
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| CN201420860336.0U Withdrawn - After Issue CN204373834U (en) | 2014-12-30 | 2014-12-30 | Wall-hanging micro-pressure-difference measurement mechanism |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105806545A (en) * | 2014-12-30 | 2016-07-27 | 中国人民解放军理工大学 | Wall-mounted micro-differential pressure measuring device |
-
2014
- 2014-12-30 CN CN201420860336.0U patent/CN204373834U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105806545A (en) * | 2014-12-30 | 2016-07-27 | 中国人民解放军理工大学 | Wall-mounted micro-differential pressure measuring device |
| CN105806545B (en) * | 2014-12-30 | 2018-07-31 | 中国人民解放军理工大学 | Wall-mounted minute-pressure difference measuring device |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150603 Effective date of abandoning: 20180731 |
|
| AV01 | Patent right actively abandoned |