CN105527209B - A kind of constant pressure type field soil ventilative speed analyzer - Google Patents
A kind of constant pressure type field soil ventilative speed analyzer Download PDFInfo
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- CN105527209B CN105527209B CN201510890233.8A CN201510890233A CN105527209B CN 105527209 B CN105527209 B CN 105527209B CN 201510890233 A CN201510890233 A CN 201510890233A CN 105527209 B CN105527209 B CN 105527209B
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- cutting ring
- air
- constant pressure
- type field
- ventilative speed
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N15/082—Investigating permeability by forcing a fluid through a sample
- G01N15/0826—Investigating permeability by forcing a fluid through a sample and measuring fluid flow rate, i.e. permeation rate or pressure change
Abstract
The invention discloses a kind of constant pressure type field soil ventilative speed analyzer, including：Ventilative speed measuring mechanism, flow quantity detection mechanism, air-pressure chamber and constant pressure mechanism, ventilative speed measuring mechanism include：Cutting ring and cutting ring fixator, formed with the gas port for entering soil to be measured for the gas in air-pressure chamber among cutting ring fixator；Flow quantity detection mechanism is arranged between the gas outlet of air-pressure chamber and the gas port of cutting ring fixator, and constant pressure mechanism is used to controlling and stablizing the indoor air pressure of air pressure.It is beneficial in that：Constant pressure type field soil ventilative speed analyzer of the invention is simple in structure, cost is relatively low, it is and easy to operate, controlled by constant pressure mechanism and stablize the indoor air pressure of air pressure so as to improve the precision of Soil ventilation speed measurement, also flowmeter improve so as to reduce the influence to measurement result at the same time, further increased measurement accuracy；The structure of cutting ring fixator is even more to be improved, it is ensured that mounting stability and good air-tightness.
Description
Technical field
The present invention relates to a kind of Soil ventilation rate determination instrument, and in particular to a kind of constant pressure type field soil ventilative speed is surveyed
Determine instrument.
Background technology
Soil ventilation speed refers to speed of the gas by the soil body, reflects the ability that soil gas and air exchange.Soil
The quality that earth is breathed freely, by the change of soil constituent, can directly influence the growth and development of crop and edaphon, can also shadow
Efficiently using for soil fertility is rung, and then influences plant growth.Defective aeration, then oxygen deficiency, will suppress crop root
Respiration, and then weaken root system absorb liquid manure function.
When judging the effect of soil cultivation management and carrying out other related scientific researches, it is often necessary to measure soil
Gas permeability because it synthetically reflects the basic physical state such as the quality, structure and elasticity of soil, while also by soil
The restriction of water content.Measure gas permeability of soil conventional method has two kinds：One kind is indoor constant pressure determination method, and another kind is pressure gauge
Method.The air pressure during ventilative of traditional constant pressure determination method is not constant, can not be formed between air in instrument stably and controllable
Pressure difference, exist and measure the problem of resultant error is larger；For manometer method dependent on complicated voltage adjusting device, measurement is more difficult, indoor
Result of the test changes the factors such as soil body pore structure easily during by season, temperature, soil sampling influenced.In view of the foregoing, mesh
It is preceding also without a kind of easy to operate, reliable results Soil ventilation rate determination instrument.
The content of the invention
To solve the deficiencies in the prior art, it is an object of the invention to provide a kind of high certainty of measurement, perseverance easy to operate
Pressure type field soil ventilative speed analyzer.
In order to realize above-mentioned target, the present invention adopts the following technical scheme that：
A kind of constant pressure type field soil ventilative speed analyzer, including：Ventilative speed measuring mechanism, flow quantity detection mechanism,
Air-pressure chamber and constant pressure mechanism, wherein, the ventilative speed measuring mechanism includes：The cutting ring that is pressed into soil to be measured and for pacifying
The cutting ring fixator of cutting ring is filled, enters the air guide of soil to be measured among the cutting ring fixator formed with the gas supplied in air-pressure chamber
Hole；The flow quantity detection mechanism is arranged between the gas outlet of air-pressure chamber and the gas port of cutting ring fixator, the constant pressure mechanism
For controlling and stablizing the indoor air pressure of air pressure.
Preferably, aforementioned flow testing agency includes：Flowmeter and microcontroller timer, the microcontroller timer and stream
Gauge is connected by conducting wire；The gas port of the cutting ring fixator passes through the first rubber with flexible ripple with flowmeter one end
Pipe connects, and the other end of the flowmeter and the gas outlet of air-pressure chamber are connected by the second rubber tube.
It is highly preferred that it is separately installed with the first valve and the second valve on foregoing first rubber tube and the second rubber tube.
More preferably, aforementioned flow is calculated as soap bubble flowmeter, including：Mounting bracket, soap bubble generator and flowmeter sheet
Body, two force sensing resistances are arranged at intervals in the flowmeter bodies, and the soap bubble generator promotes soap lye in flowmeter bodies
So as to produce soap bubble under airflow function, the microcontroller timer is connected to record soap bubble with two force sensing resistances by conducting wire
Pass through the time difference of two force sensing resistances.
Further, foregoing constant-voltage equipment includes：Ram pot, surge pipe, water pump and sink, the ram pot are higher than air pressure
Formed with water outlet, the water outlet of ram pot connects a threeway by hose for room and the bottom of ram pot, and the of the threeway
One branch pipe is connected with air-pressure chamber by the J-type pipe of an opening upwards, and the second branch pipe and the surge pipe of the threeway pass through hose phase
Even；The surge pipe includes pedestal, the tube body being installed on pedestal and is connected to tube body top delivery port and accesses sink
First drainpipe, the tube body top are to adjust formed with the length with the groove and tube body of atmosphere stretching pedestal
, the bottom discharge mouth of the air-pressure chamber accesses sink by the second drainpipe, and the 3rd valve is provided with second drainpipe
Door, the water pump are installed in sink and are supplied water by water inlet pipe to ram pot.
Preferably, a leveling support is installed below the pedestal of foregoing pressure regulation cylinder, vacuole spirit level is provided with the pedestal,
Leveling support make it that the vacuole in vacuole spirit level is placed in the middle, so as to ensure surge pipe level.
Preferably, an adjusting bolt is set between light-emitting diode body and pedestal, and rotating tubular body is to adjust it to stretch out pedestal
Length, the tube body are equipped with scale, and from top to bottom reading is sequentially increased, and the reference graduation positioned at the top is：Adjusting bolt
Top compared with the difference in height that J-type tube top portion is higher by.
It is highly preferred that being equipped with the cutting ring interface of multiple specifications in foregoing cutting ring fixator, the cutting ring interface includes：Cutting ring
Mounting groove and the gas circuit connected with gas port.
More preferably, interlock assembly and sealing mechanism are equipped with foregoing cutting ring mounting groove, the interlock assembly includes spring
With the buckle with being connected to spring end, formed with the card hole with being clasped on the cutting ring；The sealing mechanism includes：Peace
A pair of of compressing rubber pad loaded on cutting ring mounting groove entrance and the c-type being installed at the top of cutting ring mounting groove at gas circuit are close
Seal, the pressure in gas circuit is higher, then the leakproofness of c-type sealing ring is better.
Specifically, previous mentioned snap is 1/4 metal ball, the sphere of the metal ball towards cutting ring mounting groove entrance, so
Cutting ring is limited from being moved to outside groove in groove, but does not limit the movement in other directions of cutting ring, is easy to fixed cutting ring, unlocks
Shi Xuanzhuan cutting rings, metal ball press-in are pacified in spring-loaded groove, you can take out cutting ring.
The invention has the beneficial effects that：The present invention constant pressure type field soil ventilative speed analyzer it is simple in structure, into
This is relatively low and easy to operate, is controlled by constant pressure mechanism and stablizes the indoor air pressure of air pressure so as to improve Soil ventilation speed
The precision of rate measurement, while also flowmeter improve so as to reduce the influence to measurement result, further increase
Measurement accuracy；The structure of cutting ring fixator is even more to be improved, it is ensured that mounting stability and good air-tightness.
Brief description of the drawings
Fig. 1 is the mechanism signal of a preferred embodiment of the constant pressure type field soil ventilative speed analyzer of the present invention
Figure；
Fig. 2 is the cross section structure schematic diagram of cutting ring fixator and cutting ring in embodiment illustrated in fig. 1；
Fig. 3 is the close-up schematic view of Fig. 2；
Fig. 4 is the structure diagram of flow detector in embodiment illustrated in fig. 1；
Fig. 5 is the structure diagram of air-pressure chamber and surge pipe in embodiment illustrated in fig. 1.
The implication of reference numeral in figure：1st, cutting ring, 2, cutting ring fixator, 3, gas port, 4,1 mounting groove of cutting ring, 5, gas circuit,
6th, spring, 7, metal ball, 8, card hole, 9, compressing rubber pad, 10, c-type sealing ring, 11, flowmeter, 12, microcontroller timer,
13rd, the first rubber tube, the 14, second rubber tube, the 15, first valve, the 16, second valve, 17, mounting bracket, 18, soap bubble occurs
Device, 19, flowmeter bodies, 20, force sensing resistance, 21, ram pot, 22, surge pipe, 23, water pump, 24, sink, 25, threeway, 26, J
Type pipe, the 27, second drainpipe, the 28, the 3rd valve, 29, pedestal, 30, tube body, the 31, first drainpipe, 32, groove, 33, leveling
Bearing, 34, vacuole spirit level, 35, air-pressure chamber.
Embodiment
Make specific introduce to the present invention below in conjunction with the drawings and specific embodiments.
Referring to Fig. 1, constant pressure type field soil ventilative speed analyzer of the invention includes：Ventilative speed measuring mechanism, stream
Amount detection machine structure, air-pressure chamber 35 and constant pressure mechanism, the analyzer can solve constant pressure assay method measurement accuracy in the prior art
Deficiency, it is high, complicated to the dependence of precision instrument a series of problems, such as.
Wherein, as shown in Fig. 2, ventilative speed measuring mechanism includes：Cutting ring 1 and cutting ring fixator 2, in test process, ring
Knife 1 is installed on cutting ring fixator 2, is then pressed into soil to be measured, formed with air-pressure chamber 35 among cutting ring fixator 2
Gas enter soil to be measured gas port 3.Cutting ring fixator 2 is made of stainless steel cake, equipped with multiple specifications in it
Depth is the cutting ring interface of 3.5cm, and diameter is respectively 5 centimetres, 10 centimetres and 15 centimetres.Specifically, cutting ring interface includes：For
The cutting ring mounting groove 4 of fixed cutting ring 1 and the gas circuit 5 connected with gas port 3.
Need to stress, referring to Fig. 2 and Fig. 3, interlock assembly and sealing mechanism are equipped with cutting ring mounting groove 4.
Wherein, interlock assembly includes spring 6 and the buckle with being connected to 6 end of spring, formed with the card hole with being clasped on cutting ring 1
8；Buckle in the present embodiment is 1/4 metal ball 7, and for the sphere of metal ball 7 towards the entrance of cutting ring mounting groove 4, card hole 8 is two
Circular hole, at 1 top 1cm of cutting ring.So, when metal ball 7 is connected in buckle, cutting ring 1 is limited by cutting ring
Moved in the groove of mounting groove 4 to outside groove, but do not limit the movement in 1 other directions of cutting ring, be easy to fixed cutting ring 1, when unlocking
Cutting ring 1 is rotated, metal ball 7 is pressed into the groove of installation spring 6, you can takes out cutting ring 1.
In order to obtain reliable sealing performance, sealing mechanism of the invention has twice, is specially：It is installed on cutting ring mounting groove
A pair of of compressing rubber pad 9 of 4 entrances and the c-type sealing ring 10 being installed at the close gas circuit 5 in the top of cutting ring mounting groove 4, it is a pair of
Compressing rubber tightly suppresses cutting ring 1 by the elasticity of itself and realizes the first resealing, under the pressure effect in gas circuit 5, from inner cavity to C
Type sealing ring 10 presses, and the pressure in gas circuit 5 is higher, then c-type sealing ring 10 more compresses cutting ring 1, so as to fulfill second
Resealing.
Flow quantity detection mechanism is arranged between the gas outlet of air-pressure chamber 35 and the gas port 3 of cutting ring fixator 2, such as Fig. 4 institutes
Show, including：Flowmeter 11 and microcontroller timer 12, the gas port 3 of cutting ring fixator 2 and 11 one end of flowmeter are by with stretching
First rubber tube 13 of contracting ripple connects, so as to facilitate the position of flexible modulation cutting ring 1 as needed in detection process, flowmeter
11 other end is connected with the gas outlet of air-pressure chamber 35 by the second rubber tube 14, in the first rubber tube 13 and the second rubber tube 14
On be separately installed with the first valve 15 and the second valve 16, so as to control whether air enters flowmeter 11 and cutting ring fixator 2.
The flowmeter 11 of the present invention is soap bubble flowmeter, and the soap bubble flowmeter of the present embodiment includes：Mounting bracket 17, soap bubble
Generator 18 and flowmeter bodies 19, are spaced 10cm two force sensing resistances 20 of setting, force sensing resistance in flowmeter bodies 19
Anti- electrically-conducting paint is scribbled on 20, microcontroller timer 12 is connected to record soap bubble by two with two force sensing resistances 20 by conducting wire
The time difference of a force sensing resistance 20 is so as to calculate outflow.For the ease of operation, there are display, electricity on microcontroller timer 12
Source switch key, manual/auto key, start timing/button such as time out key and reset key.
In addition, in order to avoid traditional rubber plug soap bubble generator 18 produces air-flow when producing soap bubble, influence to test
This problem of accuracy, soap bubble generator 18 of the invention only promote soap lye in flowmeter bodies 19, do not produce air-flow, soap lye
Soap bubble is produced in the case where flowing through the atmospheric action of flowmeter bodies 19.
It is the air pressure in air-pressure chamber 35 is controlled and stablized using constant pressure mechanism in place of the important innovations of the present invention.Specifically
Ground, as shown in Figure 1, constant-voltage equipment includes：Ram pot 21, surge pipe 22, water pump 23 and sink 24, ram pot 21 are higher than air-pressure chamber
35 and ram pot 21 bottom formed with water outlet, the water outlet of ram pot 21 passes through hose and connects a threeway 25, threeway 25
The first branch pipe be connected with air-pressure chamber 35 by the J-type pipe 26 of an opening upwards, the second branch pipe of threeway 25 is logical with surge pipe 22
Hose is crossed to be connected.The bottom discharge mouth of air-pressure chamber 35 accesses sink 24 by the second drainpipe 27, is set on the second drainpipe 27
There is the 3rd valve 28, water pump 23 is installed in sink 24 and supplies water by water inlet pipe to ram pot 21.
The air pressure in air-pressure chamber 35 easily can be controlled and adjust by surge pipe 22, as shown in figure 5, surge pipe 22 wraps
Include pedestal 29, the tube body being installed on pedestal 29 30 and be connected to 30 top delivery port of tube body and access the first row of sink 24
Water pipe 31, the top of tube body 30 are to adjust formed with the length with the groove 32 and tube body 30 of atmosphere stretching pedestal 29
, in addition, in order to ensure surge pipe 22 is horizontal, a leveling support 33, and pedestal are also installed below the pedestal 29 of pressure regulation cylinder
Vacuole spirit level 34 is provided with 29, leveling support 33 is so that the vacuole in vacuole spirit level 34 is placed in the middle, so as to ensure surge pipe
22 is horizontal.In order to facilitate tube body 30 is adjusted, one adjusting bolt is set in the junction of tube body 30 and pedestal 29, rotating tubular body 30 is
Adjust it and stretch out the length of pedestal 29, tube body 30 is equipped with scale, and from top to bottom reading is sequentially increased, the base positioned at the top
Quasi- scale is：The top of adjusting bolt is compared with the difference in height that the top of J-type pipe 26 is higher by.Before test starts, changed by adjusting bolt
Become 30 length of tube body, that is, change water outlet grease head highness, to reach different air pressures needed for experiment, in test process, by water pump 23 to
Water is persistently injected in ram pot 21, keeps surge pipe 22 to continue water outlet, the liquid level of surge pipe 22 and the liquid level of ram pot 21
Highly identical, then the air pressure for being capable of control pressure room 35 is steady state value.
For a better understanding of the present invention, the work to constant pressure type field soil ventilative speed analyzer of the invention below
Process and calculating process are illustrated：
(1), after connecting all components according to the connection relation of Fig. 1, work into Preparatory work of experiment, close the 3rd valve
28, the first valve 15 and the second valve 16 are opened, selects 15 centimetres of 15 cm x of model (internal diameter x effective heights, similarly hereinafter)
Cutting ring 1 locks cutting ring fixator 2, and ensures to seal；
(2), by experiment setting pressure adjusting surge pipe 22 to suitable height, (scale on surge pipe 22 is that pressure calculates
Foundation), the water filling into ram pot 21 from sink 24 by water pump 23,21 liquid level of ram pot reaches setting height and J-type pipe 26
Anhydrous air-pressure chamber 35 reaches setting atmospheric pressure value, and device air-tightness is good when oozing, and suspends water filling, closes the first valve 15；
(3), in 2 inner side place mat warp layer cloth of cutting ring fixator, suitable position is selected, soil body surface is cleared up with scraper
Impurity, is directed at the soil body, firmly stepping on cutting ring fixator 2 makes in the fully-inserted soil to be measured of cutting ring 1 by the edge of a knife of cutting ring 1；
(4), the power switch of microcontroller timer 12 is opened, water filling and first is opened into ram pot 21 using water pump 23
Valve 15, produces soap bubble, soap bubble is with air motion, warp using soap bubble generator 18 after stablizing by soap lye vortex precession flowmeter body 19
Microcontroller timer 12 starts timing when crossing first force sensing resistance 20, by microcontroller timer during second force sensing resistance 20
12 terminate timing, then microcontroller timer 12 shows that the time is Δ t；
(5), the first valve 15 is closed, removes cutting ring 1, loads the cutting ring 1 of 10 centimetres of 10 cm x of model, is repeated above-mentioned
Step (2)-(4) are measured experiment in the original location；
(6), the first valve 15 is closed, removes cutting ring 1, loads the cutting ring 1 of 5 centimetres of 5 cm x of model, repeats again
State step (2)-(4) and be measured experiment in the original location；
(7), after measuring, the second valve 16 of closing, the 3rd valve 28 of opening, reduction by 22 height of surge pipe to original position,
The water in ram pot 21 and air-pressure chamber 35 is recycled, takes out cutting ring 1, site clearing.
Record cutting ring 1 internal diameter D, 1 effective height h of cutting ring, reading Δ t, 22 graduation mark of surge pipe on microcontroller timer 12
Reading H and experiment temperature T, according to Darcy laws, fluid through the amount Q and soil aeration area S of earth pillar, fluid pressure difference P,
Time, Δ t was directly proportional, and (i.e. 1 effective height h) of cutting ring, coefficient of viscosity μ are inversely proportional with soil body thickness L.
Above-mentioned principle is applied to use the sample soil body, obtains following equations：
In formula (1)：Q is Soil ventilation amount (cm3)；S is sample soil body cross-sectional area (cm2)；P is air pressure difference (Pa)；Δ
T is the time (s)；L is sample soil body thickness (cm)；μ is air viscosity coefficient, wherein, sample soil body cross-sectional area S, time Δ
T, sample soil body thickness L is obtained by testing directly to record or measure；Air viscosity coefficient is looked into by test temperature T《Physical chemistry
Handbook》Obtain；Air pressure difference P is drawn by hydrostatic pressure calculation formula：
P=ρ gH (2)
In formula (2)：ρ is the density (kg/m of water under experimental temperature3)；G is local gravitational acceleration (m/s2)；H is high for liquid level
Difference, i.e. 22 graduation mark reading H (m) of surge pipe.
Under conditions of temperature-resistant, Soil ventilation amount Q is according to Boyle, Robert-boyle's law:P1V1=P2V2Draw：
Q=V1=P2V2/P1 (3)
In formula (3)：P1For local atmospheric pressure (Pa)；P2For air pressure in air-pressure chamber 35, i.e., local atmospheric pressure and air pressure difference it
(Pa)；V2For the volume of flowmeter bodies 19, (cm is obtained by internal diameter and length computation3)。
Finally, Soil ventilation Rate Index K can be calculated by formula (1)：
To sum up, constant pressure type field soil ventilative speed analyzer of the invention is simple in structure, cost is relatively low, and operation side
Just, controlled by constant pressure mechanism and stablize the air pressure in air-pressure chamber 35 so as to improve the precision of Soil ventilation speed measurement, together
When also flowmeter 11 improve to reduce to measurement error, further increase measurement accuracy；The knot of cutting ring fixator 2
Structure is also improved, it is ensured that mounting stability and good air-tightness.
The basic principles, main features and advantages of the invention have been shown and described above.The technical staff of the industry should
Understand, the invention is not limited in any way for above-described embodiment, all to be obtained by the way of equivalent substitution or equivalent transformation
Technical solution, all falls within protection scope of the present invention.
Claims (9)
- A kind of 1. constant pressure type field soil ventilative speed analyzer, it is characterised in that including：Ventilative speed measuring mechanism, flow Testing agency, air-pressure chamber and constant pressure mechanism, wherein, the ventilative speed measuring mechanism includes：The cutting ring being pressed into soil to be measured And for installing the cutting ring fixator of cutting ring, enter among the cutting ring fixator formed with the gas supplied in air-pressure chamber to be measured The gas port of soil；The flow quantity detection mechanism is arranged between the gas outlet of air-pressure chamber and the gas port of cutting ring fixator, institute Constant pressure mechanism is stated to be used to controlling and stablizing the indoor air pressure of air pressure；The constant pressure mechanism includes：Ram pot, surge pipe, water pump and sink, the ram pot are higher than air-pressure chamber and ram pot Bottom formed with water outlet, the water outlet of ram pot passes through hose and connects a threeway, the first branch pipe of the threeway and air pressure Room is connected by the J-type pipe of an opening upwards, and the second branch pipe of the threeway is connected with surge pipe by hose；The surge pipe Including pedestal, the tube body being installed on pedestal and the first drainpipe for being connected to tube body top delivery port and access sink, institute Stating can be adjusted at the top of tube body formed with the length that pedestal is stretched out with the groove and tube body of atmosphere, the air-pressure chamber Bottom discharge mouth sink is accessed by the second drainpipe, the 3rd valve, the water pump peace are provided with second drainpipe Loaded in sink and by water inlet pipe to ram pot supply water.
- A kind of 2. constant pressure type field soil ventilative speed analyzer according to claim 1, it is characterised in that the flow Testing agency includes：Flowmeter and microcontroller timer, the microcontroller timer are connected with flowmeter by conducting wire；The ring The gas port of knife fixator is connected with flowmeter one end by the first rubber tube with flexible ripple, the flowmeter it is another End is connected with the gas outlet of air-pressure chamber by the second rubber tube.
- 3. a kind of constant pressure type field soil ventilative speed analyzer according to claim 2, it is characterised in that described first The first valve and the second valve are separately installed with rubber tube and the second rubber tube.
- A kind of 4. constant pressure type field soil ventilative speed analyzer according to claim 2, it is characterised in that the flow Soap bubble flowmeter is calculated as, including：Mounting bracket, soap bubble generator and flowmeter bodies, are spaced in the flowmeter bodies and set Two force sensing resistances are put, the soap bubble generator promotes soap lye so as to produce soap bubble under airflow function in flowmeter bodies, The microcontroller timer is connected to record time difference of the soap bubble by two force sensing resistances with two force sensing resistances by conducting wire.
- A kind of 5. constant pressure type field soil ventilative speed analyzer according to claim 1, it is characterised in that the pressure regulation One leveling support is installed below the pedestal of pipe, vacuole spirit level is provided with the pedestal.
- A kind of 6. constant pressure type field soil ventilative speed analyzer according to claim 5, it is characterised in that the tube body One adjusting bolt is set between pedestal, rotating tubular body is to adjust it to stretch out the length of pedestal, and the tube body is equipped with scale, From top to bottom reading is sequentially increased, and the reference graduation positioned at the top is：The top of adjusting bolt is higher by compared with J-type tube top portion Difference in height.
- A kind of 7. constant pressure type field soil ventilative speed analyzer according to claim 5, it is characterised in that the cutting ring The cutting ring interface of multiple specifications is equipped with fixator, the cutting ring interface includes：Cutting ring mounting groove and the gas connected with gas port Road.
- A kind of 8. constant pressure type field soil ventilative speed analyzer according to claim 7, it is characterised in that the cutting ring Interlock assembly and sealing mechanism are equipped with mounting groove, the interlock assembly includes spring and the buckle with being connected to spring end, Formed with the card hole with being clasped on the cutting ring；The sealing mechanism includes：It is installed on a pair of cutting ring mounting groove entrance Compressing rubber pad and the c-type sealing ring being installed at the close gas circuit in cutting ring mounting groove top.
- A kind of 9. constant pressure type field soil ventilative speed analyzer according to claim 8, it is characterised in that the buckle For 1/4 metal ball, the entrance of the sphere of the metal ball towards cutting ring mounting groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510890233.8A CN105527209B (en) | 2015-12-07 | 2015-12-07 | A kind of constant pressure type field soil ventilative speed analyzer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510890233.8A CN105527209B (en) | 2015-12-07 | 2015-12-07 | A kind of constant pressure type field soil ventilative speed analyzer |
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| CN105527209A CN105527209A (en) | 2016-04-27 |
| CN105527209B true CN105527209B (en) | 2018-04-20 |
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| CN201510890233.8A Expired - Fee Related CN105527209B (en) | 2015-12-07 | 2015-12-07 | A kind of constant pressure type field soil ventilative speed analyzer |
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| CN106841003B (en) * | 2017-01-24 | 2023-07-14 | 浙江工业大学 | Portable multi-depth permeability coefficient field measurement device |
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| CN102798586A (en) * | 2012-08-30 | 2012-11-28 | 源达日化(天津)有限公司 | Novel testing system for testing air permeability of micro air-permeable film |
| CN103091199A (en) * | 2013-01-24 | 2013-05-08 | 张振华 | Non-invasive instant measuring system and method for air conductivity of soil |
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| CN105527209A (en) | 2016-04-27 |
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