CN206002423U - Electronic gas permeability detector instrument calibration device - Google Patents
Electronic gas permeability detector instrument calibration device Download PDFInfo
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- CN206002423U CN206002423U CN201620857637.7U CN201620857637U CN206002423U CN 206002423 U CN206002423 U CN 206002423U CN 201620857637 U CN201620857637 U CN 201620857637U CN 206002423 U CN206002423 U CN 206002423U
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- gas permeability
- electronic gas
- permeability detector
- air flue
- pipe
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Abstract
The utility model is related to a kind of electronic gas permeability detector instrument calibration device, and including the shell body that the sample holder with the electronic gas permeability detector is tightly connected, the inner chamber of the shell body is connected with the gas outlet of the sample holder；Intermediate, the centre are provided with air flue in vivo, and the intermediate is connected with the shell body, and the inner space of the air flue and the shell body；Three-way pipe, the first port of the three-way pipe is connected with the air flue of the intermediate, the second port connection flexible pipe of the three-way pipe, the flexible pipe connects the micromanometer interface of the electronic gas permeability detector, 3rd port of the three-way pipe connects the manometric mouth of pipe of U-tube, the U-tube another mouth of pipe connection standard atmospheric pressure system manometric.The beneficial effects of the utility model：Reliability and high precision is not only verified, and the instrument of electronic gas permeability detector need not be pulled down and can achieve verification.
Description
Technical field
The utility model belongs to instrument calibration device, more particularly to a kind of electronic gas permeability detector instrument calibration device.
Background technology
The electronic gas permeability detector of STD is mainly used in the direct measure of foundry's mould permeability, it can also be used to test
Room determines the permeability of foundry sand and compound in dry state or hygrometric state, it may also be used for other industries determine relevant material
Permeability.
The electronic gas permeability detector of STD is made up of main frame and casting mold test accessories, and is equipped with baked permeability sample bucket, verification cover
And check block.Main frame include miniature high-speed centrifugal blower, control power module, electric machine speed regulation module, sample holder, micromanometer and
The parts such as cabinet.Casting mold test accessories are made up of gauge head, on-tube and breather pipe, cover.
The electronic gas permeability detector of above-mentioned STD using when be required for being corrected the micromanometer of its inside, and current
In digital pressure check system, SPMK2000C type micro pressure gas pressure source calibration equipment as shown in Figures 3 and 4, its energy
There is provided stable and can be with the sufficiently small minute-pressure pressure of control pressure change, therefore, it is possible to complete micro- (poor) transmitter, micro- well
The verifying work of the minute-pressure instrument and meters such as pressure sensor, minute-pressure diaphragm manometer.
Operation principle is：Instrument to be verified is connected at meters under test interface 13, rolled round 14 is rotated, and is connected by straight-bar
12 internal piston of cylinder, band piston are moved forward and backward, and are changed by compressed gas volume so that cylinder interior gas pressure changes
Become.One end that cylinder air outlet valve 11 is located is connected with precision pressure gauge 9 and meters under test interface 13 respectively by two breather pipes
Connect.The effect of air outlet valve 11 is to unload carrier gas cylinder and the gas pressure in instrument.During check meter, meters under test is placed on and is treated
Survey on the position of instrumentation tap 13, by precision pressure gauge and meters under test identical gas pressure is given, observe two instrument
Registration difference, so as to meters under test complete correction.
But for the electronic gas permeability detector of STD, the particularity of its verifying work causes SPMK2000C type minute-pressure
Gas pressure source cannot be used, and be analyzed as follows：
First, SPMK2000C type micro pressure gas pressure source its make pressure -40～0～50kpa of scope, minimum controllable adjustment degree
0.01Pa, and the piezometry scope of the electronic gas permeability detector of STD is 0～980Pa, the two range gap is too big, with
SPMK2000C type micro pressure gas pressure source will certainly cause error mistake as the criteria check table of the electronic gas permeability detector of STD
Big phenomenon.
Secondly, the instrument of the electronic gas permeability detector of STD is located at instrument internal, dismounting extremely inconvenience, and the interface of instrument
For hose construction, and the instrument checked by SPMK2000C type micro pressure gas pressure source allows for disassembling, and is placed on Fig. 4
The position of middle meters under test interface 13, and the instrumentation tap at meters under test interface 13 is standard thread form, the two interface
Cannot mate.
Above 2 points determine that SPMK2000C type micro pressure gas pressure source cannot be used as the electronic gas permeability detector of STD
Calibration equipment.
Utility model content
For overcoming drawbacks described above, the utility model provides a kind of electronic gas permeability detector instrument calibration device, not only school
Reliability and high precision is tested, and the instrument of electronic gas permeability detector need not be pulled down and can achieve verification.
For solving above-mentioned technical problem, the technical solution of the utility model is：A kind of electronic gas permeability detector instrument school
Experiment device, including the shell body that the sample holder with the electronic gas permeability detector is tightly connected, the inner chamber of the shell body with
The gas outlet connection of the sample holder；Intermediate, the centre are provided with air flue in vivo, and the intermediate is connected with the shell body
Connect, and the inner space of the air flue and the shell body；Three-way pipe, the first port of the three-way pipe and the intermediate
Air flue is connected, and the second port connection flexible pipe of the three-way pipe, the flexible pipe connect the minute-pressure of the electronic gas permeability detector
Table interface, the 3rd port connection manometric mouth of pipe of U-tube of the three-way pipe, the U-tube manometric another
Mouth of pipe connection standard atmospheric pressure system.
Used as further improving, the intermediate is provided with the flow control valve of control gas output size.
Used as further improving, the flow control valve includes the rotating shaft being rotatably installed on the intermediate, described
The axis of rotating shaft is vertical with the bearing of trend of the air flue, and the rotating shaft separates the air flue, and the institute at the air flue
State in rotating shaft and passage is offered, the rotating shaft for stretching out the intermediate is provided with operating handle.
Used as further improving, the rotating shaft is connecting bolt, and the connecting bolt is tight with the inwall of the intermediate
Closely connected conjunction.
Used as further improving, the flexible pipe is rubber tube.
Employ above technical scheme, the beneficial effects of the utility model：
1) as this calibration equipment is connected with sample holder by shell body, shell body pass through intermediate connecting tee pipe, three
Source of the gas is led up to rubber tube and is directly connected with micromanometer by siphunculus, and another road is connected with the manometric a port of U-tube, and
U-tube another port manometric is connected with standard atmospheric pressure system, thus by adjusting flow control valve, can be caused micro-
Pressure table shows multiple different pressure value, while U-tube pressure gauge can obtain multiple pressure value by computing formula, then than
Compared with the two pressure value, so as to complete verification, multiple pressure value relatively after can ensure the precision and the reliability that verify；While changing
The drawbacks of other calibration equipments must be dismantled instrument and test, in the form of rubber tube is drawn so that the instrument of more difficult dismounting
The verification of the internal instrument of device is possibly realized, it is to avoid the damage that dismounting instrument is caused, using rubber interface tube, it is achieved that with STD
The Rational Matching of electronic gas permeability detector similar instrumentation interface.
2) as reasonable employment U-tube pressure gauge replaces accurate pressure gauge, asking for minimum meter verification difficulty is solved
Topic, and three-way pipe and rubber pipe size can be adjusted, the manometric model of U-tube can be according to the range of instrument to be verified
Change, this allows for the instrument that this device can verify different ranges.
Description of the drawings
Fig. 1 is the structural representation of electronic gas permeability detector instrument calibration device；
Fig. 2 is tested calculation of pressure schematic diagram in U-tube pressure gauge；
Fig. 3 is the structural representation of the existing SPMK2000C type micro pressure gas pressure source calibration equipment for using；
Fig. 4 is the top view of Fig. 3；
Shown in figure：The electronic gas permeability detector of 1-, 10- micromanometer, 2- sample holder, 3- shell body, 30- inner chamber, in 4-
Mesosome, 5- flow control valve, 50- connecting bolt, 51- operating handle, 6- three-way pipe, 7- rubber tube, 8-U type tube manometer, 9-
Precision pressure gauge, 11- air outlet valve, 12- cylinder, 13- meters under test interface, 14- rolled round.
Specific embodiment
In order that the purpose of this utility model, technical scheme and advantage become more apparent, below in conjunction with accompanying drawing and enforcement
Example, is further elaborated to the utility model.
As shown in common in Fig. 1 and Fig. 2, a kind of electronic gas permeability detector instrument calibration device, including ventilative with electronic
The shell body 3 that the sample holder 2 of property detector 1 is tightly connected, the inner chamber 30 of shell body 3 are connected with the gas outlet of sample holder 2.Sample
Seat 2 is with damping sheet in cylindrical structure, cylinder body, has two ventholes, a big venthole at the top of cylinder
With a little venthole.During use, select to give vent to anger from big venthole or go out from little venthole according to actually detected needs
Gas.
Shell body 3 connects intermediate 4, is provided with air flue, and air flue is connected with the inner chamber 30 of shell body 3 in intermediate 4.
Also include three-way pipe 6, the first port of three-way pipe 6 is connected with the air flue of intermediate 4, the second port of three-way pipe 6
Connection flexible pipe, flexible pipe are preferably rubber tube 7, and rubber tube 7 connects the instrumentation tap of electronic gas permeability detector 1, and the of three-way pipe 6
Three ports connect a mouth of pipe of U-tube pressure gauge 8, another mouth of pipe connection standard atmospheric pressure system of U-tube pressure gauge 8
(not shown).
During in order to verification detection is realized, the point of multiple pressure value can be obtained, it is big that control gas output is set on intermediate 4
Little flow control valve 5.Preferably, flow control valve 5 includes the rotating shaft being rotatably installed on intermediate 4, the axis of rotating shaft with
The bearing of trend of air flue is vertical, and rotating shaft separates air flue, and offers passage in the rotating shaft at air flue, stretches out intermediate 4
Rotating shaft be provided with operating handle 51.Overall structure is simple, is easy to operation.
Connecting bolt 50 is elected in above-mentioned rotating shaft as, and inwall of the connecting bolt 50 with intermediate 4 is fitted tightly, and realizes connection
While can also realize rotating, assembling structure is simple.
Operation principle is simply introduced：Cleaning Principle is the principle design for causing uniform pressure according to same airflow
's.When electronic gas permeability detector instrument is verified, as shown in fig. 1, rubber tube 7 is directly plugged on electronic gas permeability detector
On the interface of 1 micromanometer 10, then start the centrifugal blower of electronic gas permeability detector 1, stable pressure gas source can be produced
Lead to sample holder 2, after the damping sheet in which, enter in the inner chamber 30 of shell body 3, then enter from inner chamber 30 middle
In the air flue of body 4, source of the gas continues circulation and reaches three-way pipe 6, then flows out from two other port of three-way pipe 6 respectively, half
Source of the gas is entered into by rubber tube 7 in the micromanometer 10 of electronic gas permeability detector 1, causes minute-pressure meter pressure to show, and in addition one
Half source of the gas is entered into by rubber tube and causes right-hand member water column to raise in U-tube pressure gauge 8.
The pressure of 8 left end of U-tube pressure gauge is now calculated, shown in Fig. 2, in pipe, fills appropriate hydraulic fluid
(water), one end connection standard atmospheric pressure system of U-tube, i.e. p2 are known standard atmospheric pressure, and the other end of U-tube is connected to
The pressure p 1 of tested pressure system, i.e. system under test (SUT), can be calculated by following formula：P1=P2-pg (h1+h2).Wherein, (h1+
H2) poor for system under test (SUT) and baseline system liquid level, p is the density of hydraulic fluid, and g is acceleration of gravity.Then compare p1
With the numerical value shown in the micromanometer of electronic gas permeability detector, you can complete verification.
It is merely capable of obtaining a verification numerical value after above-mentioned calculating, such detection has limitation and inaccurate
Property, it is impossible to ensure the reliability of inspection.
Now by regulation flow control valve 5, thus it is possible to vary the size of the air outlet of the internal air flue of intermediate 4, tune is played
Solar term stream size, the effect of change pressure.
Rotating operation handle 51, operating handle 51 drive connecting bolt 50 to rotate, and turn to the ventilation on connecting bolt 50
When the direction in hole is identical with 4 direction of intermediate, air-flow can pass through from passage, and now air output is maximum, when turning to ventilation
The direction in hole is different from the direction of intermediate, then air-flow is slack-off or stops.Using the passage on bolt and the joint face of air flue
Product size control gas output.
By adjust flow control valve 5 can obtain multiple by measuring pressure P1 and the pressure of micromanometer, by multi-group data
After being compared, accuracy and the reliability of verification detection are improve.
Preferred embodiment of the present utility model is the foregoing is only, not in order to limit the utility model, all at this
Any modification, equivalent and improvement that is made within the spirit and principle of utility model etc., should be included in the utility model
Protection domain within.
Claims (5)
1. electronic gas permeability detector instrument calibration device, it is characterised in that include：
The shell body (3) being tightly connected with the sample holder of the electronic gas permeability detector, the inner chamber (30) of shell body (3)
Connect with the gas outlet of the sample holder (2)；
Intermediate (4), is provided with air flue in intermediate (4), and intermediate (4) are connected with the shell body (3), and described
Air flue is connected with the inner chamber (30) of the shell body (3)；
Three-way pipe (6), the first port of three-way pipe (6) are connected with the air flue of the intermediate (4), three-way pipe (6)
Second port connection flexible pipe, the flexible pipe connects the micromanometer interface of electronic gas permeability detector (1), the three-way pipe
(6) mouth of pipe of the 3rd port connection U-tube pressure gauge (8), another mouth of pipe connection of U-tube pressure gauge (8)
Standard atmospheric pressure system.
2. electronic gas permeability detector instrument calibration device according to claim 1, it is characterised in that the intermediate
(4) flow control valve (5) of control gas output size is provided with.
3. electronic gas permeability detector instrument calibration device according to claim 2, it is characterised in that the Flow-rate adjustment
Valve (5) includes the rotating shaft being rotatably installed on the intermediate (4), and the axis of the rotating shaft is hung down with the bearing of trend of the air flue
Directly, the rotating shaft separates the air flue, and offers passage in the rotating shaft at the air flue, stretches out the centre
The rotating shaft of body (4) is provided with operating handle (51).
4. electronic gas permeability detector instrument calibration device according to claim 3, it is characterised in that the rotating shaft is for connecting
Connecting bolt (50), connecting bolt (50) are fitted tightly with the inwall of the intermediate (4).
5. electronic gas permeability detector instrument calibration device according to claim 1, it is characterised in that the flexible pipe is rubber
Sebific duct (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620857637.7U CN206002423U (en) | 2016-08-09 | 2016-08-09 | Electronic gas permeability detector instrument calibration device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620857637.7U CN206002423U (en) | 2016-08-09 | 2016-08-09 | Electronic gas permeability detector instrument calibration device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206002423U true CN206002423U (en) | 2017-03-08 |
Family
ID=58199636
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620857637.7U Active CN206002423U (en) | 2016-08-09 | 2016-08-09 | Electronic gas permeability detector instrument calibration device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206002423U (en) |
-
2016
- 2016-08-09 CN CN201620857637.7U patent/CN206002423U/en active Active
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |