CN205938512U - Accurate pressure relief device of threshold value adjustable - Google Patents
Accurate pressure relief device of threshold value adjustable Download PDFInfo
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- CN205938512U CN205938512U CN201620562153.XU CN201620562153U CN205938512U CN 205938512 U CN205938512 U CN 205938512U CN 201620562153 U CN201620562153 U CN 201620562153U CN 205938512 U CN205938512 U CN 205938512U
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- pipeline
- pressure
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- pressure relief
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Abstract
The utility model relates to an accurate pressure relief device of threshold value adjustable belongs to coal mine safety technical field, is particularly useful for test of methane desorption law and research under the level pressure condition. Accurate pressure relief device of threshold value adjustable comprises the system of aerifing and pressure release system two parts, and the system of aerifing includes nitrogen cylinder, buffer tank, precision pressure gauge, valve and pipeline, and the pressure release system comprises airtight cavity, flexible glue pipe and pipeline. At first to adding the water yield that can flood the flexible glue pipe in the airtight cavity, fill gaseously and adjust to specified pressure value P0 in to airtight cavity through the system of inflating, when pressure was greater than specified pressure value P0 when the container in, the flexible glue pipe opened, gaseously passed through the pipeline discharge, and when container pressure was less than or equal to specified pressure value P0, the closure was managed to the flexible glue, and the possible accurate pressure release of this method and apparatus for has effectively been solved in the unsafe problem of pressure release in -process pressure release.
Description
Technical field
This utility model is related to a kind of threshold value adjustable precision pressure relief device, belongs to technical field of mine safety, especially suitable
For adsorption law test under the conditions of level pressure and research.
Background technology
At present, the test of coal gas adsorption law and research are carried out under an atmospheric pressure environment, but coal body watt
, commonly greater than an atmospheric pressure, therefore its desorbing environment is also greater than an atmospheric pressure for this environmental effect.If in laboratory simulation
This ambient pressure, is inaccurate using existing in the market unidirectional relief valve, because the main work of unidirectional relief valve
As principle it is：Telescopic spring by its inside carrys out pressure release, the damping of spring conference cause pressure release too small, the damping of spring
Little pressure release can be caused excessive, the unidirectional relief valve of comprehensive analysis has larger error, and not sensitive.
Therefore, if laboratory accurate simulation coal-bed gas preservation pressure it is necessary to set up a kind of threshold value adjustable
The method and apparatus of accurate relief valve, it does not damp, very sensitive, can effectively solve excessive or too small the asking of pressure release
Topic, accomplishes accurate pressure release.
Content of the invention
In order to solve defect present in above-mentioned prior art, there is provided herein a kind of be capable of threshold value adjustable precision pressure release
Method and apparatus is it is possible to holding container 31 is in certain pressure value P0Under the conditions of desorbing.
This utility model is related to a kind of threshold value adjustable precision pressure relief device, by inflation system and pressure relief system two parts group
Become；Described pressure relief system is connected with inflation system by the cavity interface 14 positioned at airtight cavity 23 upper end, in pressure relief system
Airtight cavity 23 in flexible rubber hose 22 1 is installed, the length of flexible rubber hose is 5～10cm, and flexible rubber hose 22 upper end is connected with pipeline 19
Connect, flexible rubber hose 22 lower end is connected with the second pipeline 24, diameter changing device 28, diameter changing device 28 and the are installed in the second pipeline 24 lower end
Three pipelines 30 are connected, and the 3rd pipeline 30 is installed the first valve 29 and the 3rd pipeline 30 connection container 31.
Further, described inflation system includes nitrogen cylinder, surge tank, pressure gauge, valve and pipeline, by pipeline,
Nitrogen cylinder 1 is connected with the second valve 2, and the second valve 2 is connected with surge tank 3, and surge tank 3 is connected with the 3rd valve 5, wherein buffers
On pipeline between tank 3 and the 3rd valve 5, precision pressure gauge 4 is installed, the 3rd valve 5 is connected with four-way 7, in four-way 7 upper port
Pressure gauge 6 is installed, four-way 7 lower port is connected with cavity interface 14 by pipeline.
Further, wrapped up by the iron sheet sleeve pipe 21 of eye outside described flexible rubber hose 22.
Further, the first pipeline 19 in pressure relief system passes through the hub-interface of cavity 23 upper end by the of cavity 23 outside
One hex nut 15 fastens, and the first hex nut 15 is connected with the first pipeline 19 by screw thread, and cavity 23 is stamped the first O-ring
17 and second O-ring 18, the first O-ring 17 and the second O-ring 18 are located at below the first hex nut 15.In cavity 23 bottom
Heart interface is fastened by second hex nut 27 in cavity 23 outside, and the second hex nut 27 passes through screw thread and the second pipeline 24 connects
Connect, cavity 23 bottom has the 3rd O-ring 25 and the 4th O-ring 26, the 3rd O-ring 25 and the 4th O-ring 26 to be located at the second hexagonal
Above nut 27.
There is provided a kind of precision pressure releasing method using threshold value adjustable precision pressure relief device, carry out in accordance with the following steps：
Step one, opens lid on cavity, adds a certain amount of water, the height of water reaches and floods flexible rubber hose 22 in cavity 23
, then pass through to cover in bolt 13 and bolt 16 fastening；
Step 2, all valves 2,5,8,9,11,29 in shutoff device, open the valve of nitrogen cylinder 1, then open
Two valves 2, pour a certain amount of gas to surge tank 3, and valve and second valve 2 of nitrogen cylinder 1 is closed in inflation after finishing；Open
3rd valve 5 and valve 9, are filled with a certain amount of gas in cavity 23, so that precision pressure gauge 6 registration value P is set with container 31
Pressure value P0Equal, inflation closes the 3rd valve 5 and valve 9 after finishing；
Step 3, opens the first valve 29 and valve 11, increase over time, the gas that the coal 32 in container 31 desorbs
The scale of construction is increasing, and therefore gas pressure is also increasing；As the gas pressure P in container 311More than set pressure P0
When, flexible rubber hose opens, and gas is discharged by pipeline, and the gas pressure therefore in container reduces；When the gas pressure in container is little
In or be equal to cavity in gas pressure when, flexible rubber hose closes in the presence of water is gentle again.
This utility model make use of the elasticity of flexible glue tube wall so that flexible rubber hose closes under the gentle pressure effect of water,
The method with device undamped and is quick on the draw, and can accomplish accurate pressure release, efficiently solves the inaccurate problem of pressure release.
Brief description
Fig. 1 is a kind of generalized section of threshold value of this utility model adjustable precision pressure relief device.
Specific embodiment
Below in conjunction with the accompanying drawings enforcement of the present utility model is described in further detail.
This utility model is a kind of threshold value adjustable precision pressure relief device it is adaptable to keep constant pressure to requirement in container
Force system.As shown in figure 1, threshold value adjustable precision pressure relief device, it is made up of inflation system and pressure relief system two parts.
Described inflation system pass through pipeline by nitrogen cylinder 1, the second valve 2, surge tank 3, pressure gauge 4, the 3rd valve 5,
Four-way 7 is sequentially connected, and installs pressure gauge 6 on four-way 7, and four-way 7 right output port is connected with valve 8 by pipeline, four-way 7 lower port
It is connected with cavity interface 14 by pipeline；All valves 2,5,8,9,11,29 in shutoff device, open the valve of nitrogen cylinder 1
Door, then opens the second valve 2, pours a certain amount of gas to surge tank 3, inflation close after finishing nitrogen cylinder 1 valve and
Second valve 2；Open the 3rd valve 5 and valve 9, in cavity 23, be filled with a certain amount of gas, make precision pressure gauge 6 registration value
The pressure value P that P is set with container 200Equal, inflation closes the 3rd valve 5 and valve 9 after finishing；Inflation system is to adjust
Pressure in airtight cavity in pressure relief system, makes the required constant pressure keeping of the container that the pressure value P in airtight cavity is connected
Force value P0Unanimously.
Described pressure relief system is connected with inflation system by the cavity interface 14 positioned at airtight cavity 23 upper end, pressure release system
Flexible rubber hose 22 1 is installed in the airtight cavity 23 in system, the length of flexible rubber hose is 5～10cm, flexible rubber hose 22 upper end and first pipe
Road 19 is connected, and flexible rubber hose 22 lower end is connected with the second pipeline 24, and diameter changing device 28 is installed in the second pipeline 24 lower end, and reducing fills
Put 28 to be connected with the 3rd pipeline 30, the 3rd pipeline 30 is installed the first valve 29 and the 3rd pipeline 30 connection container 31；Use
When, adding water to make water level in airtight cavity is higher than flexible rubber hose top, is then adjusted in airtight cavity by inflation system
Pressure is so that pressure value P in airtight cavity 23 and the pressure value P set by container 310Unanimously, pressure relief system passes through flexible rubber hose
Closure so that gasometric in the container 31 that connected is released, thus maintaining the constant of container inner pressure value；Flexible glue
The iron sheet sleeve pipe 14 having eye outside pipe 21 wraps up, and fastens flexible rubber hose and is easily installed.
Pressure in pressure relief system must be invariable, just can play the control that the pressure to container 31 keeps invariable
Effect, the airtight cavity 23 therefore in pressure relief system must assure that close airtight, lid on nut 13 and nut 16 fastening, first pipe
Road 19 passes through the hub-interface of cavity 23 upper end to be fastened by first hex nut 15 in cavity 23 outside, and the first hex nut 15 leads to
Cross screw thread to be connected with the first pipeline 19, cavity 23 is stamped the first O-ring 17 and the second O-ring 18, the first O-ring 17 and second
O-ring 18 is located at below the first hex nut 15；Second pipeline 24 passes through the hub-interface of cavity 23 bottom by outside cavity 23
The second hex nut 27 fasten, the second hex nut 27 is connected with the second pipeline 24 by screw thread, and cavity 23 bottom has is,
Three O-ring 25 and the 4th O-ring 26, the 3rd O-ring 25 and the 4th O-ring 26 are located above the second hex nut 27, by spiral shell
Female effect with O-ring makes, and, in insertion airtight cavity, the seal of junction is good, thus ensure that closed chamber for pipeline
The air-tightness of body.
This utility model also includes a kind of threshold value adjustable precision pressure releasing method, using the adjustable precision pressure release of above-mentioned threshold value
Device, is carried out as follows：
Step one, opens lid on cavity, adds a certain amount of water, the height of water reaches and floods flexible rubber hose 22 in cavity 23
, then pass through to cover in bolt 13 and bolt 16 fastening；
Step 2, all second valves 2,5,8,9,11,29 in shutoff device, open the valve of nitrogen cylinder 1, then beat
Open the second valve 2, pour a certain amount of gas to surge tank 3, valve and second valve 2 of nitrogen cylinder 1 is closed in inflation after finishing；
Open the 3rd valve 5 and valve 9, in cavity 23, be filled with a certain amount of gas, make precision pressure gauge 6 registration value P and container 31
The pressure value P setting0Equal, inflation closes the 3rd valve 5 and valve 9 after finishing；
Step 3, opens the first valve 29 and valve 11, increase over time, the gas that the coal 32 in container 31 desorbs
The scale of construction is increasing, and therefore gas pressure is also increasing.As the gas pressure P in container 311More than set pressure P0
When, flexible rubber hose opens, and gas is discharged by pipeline, and the gas pressure therefore in container reduces；As the gas pressure P in container1
During less than or equal to gas pressure P in cavity, flexible rubber hose closes in the presence of water is gentle again.
Claims (4)
1. a kind of threshold value adjustable precision pressure relief device is it is characterised in that be made up of inflation system and pressure relief system two parts；Institute
The pressure relief system stated is by positioned at airtight cavity（23）The cavity interface of upper end（14）It is connected with inflation system, in pressure relief system
Airtight cavity（23）Interior installation flexible rubber hose（22）One, the length of flexible rubber hose is 5 ~ 10cm, flexible rubber hose（22）Upper end and first pipe
Road（19）It is connected, flexible rubber hose（22）Lower end and the second pipeline（24）It is connected, the second pipeline（24）Diameter changing device is installed in lower end
（28）, diameter changing device（28）With the 3rd pipeline（30）It is connected, the 3rd pipeline（30）Upper installation the first valve（29）And the 3rd pipe
Road（30）Connection container（31）.
2. as claimed in claim 1 a kind of threshold value adjustable precision pressure relief device it is characterised in that described inflation system bag
Include nitrogen cylinder, surge tank, pressure gauge, valve and pipeline, by pipeline, nitrogen cylinder（1）With the second valve（2）It is connected, second
Valve（2）With surge tank（3）It is connected, surge tank（3）With the 3rd valve（5）It is connected, wherein surge tank（3）With the 3rd valve（5）
Between pipeline on install precision pressure gauge（4）, the 3rd valve（5）With four-way（7）It is connected, in four-way（7）Upper port installs pressure
Power table（6）, four-way（7）Lower port passes through pipeline and cavity interface（14）It is connected.
3. as claimed in claim 1 a kind of threshold value adjustable precision pressure relief device it is characterised in that described flexible rubber hose（22）Outward
Portion is by the iron sheet sleeve pipe of eye（21）Parcel.
4. as claimed in claim 1 a kind of threshold value adjustable precision pressure relief device it is characterised in that in described pressure relief system
First pipeline（19）Through cavity（23）The hub-interface of upper end is by cavity（23）First hex nut in outside（15）Fastening, the
One hex nut（15）By screw thread and the first pipeline（19）Connect, cavity（23）On be stamped the first O-ring（17）With the 2nd O shape
Circle（18）, the first O-ring（17）With the second O-ring（18）Positioned at the first hex nut（15）Below；Second pipeline（24）Pass through
Cavity（23）The hub-interface of bottom is by cavity（23）Second hex nut in outside（27）Fastening, the second hex nut（27）Logical
Cross screw thread and the second pipeline（24）Connect, cavity（23）3rd O-ring is arranged at bottom（25）With the 4th O-ring（26）, the 3rd O-ring
（25）With the 4th O-ring（26）Positioned at the second hex nut（27）Above.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620562153.XU CN205938512U (en) | 2016-06-12 | 2016-06-12 | Accurate pressure relief device of threshold value adjustable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620562153.XU CN205938512U (en) | 2016-06-12 | 2016-06-12 | Accurate pressure relief device of threshold value adjustable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205938512U true CN205938512U (en) | 2017-02-08 |
Family
ID=57932104
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620562153.XU Withdrawn - After Issue CN205938512U (en) | 2016-06-12 | 2016-06-12 | Accurate pressure relief device of threshold value adjustable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205938512U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105889752A (en) * | 2016-06-12 | 2016-08-24 | 河南理工大学 | Threshold-adjustable precise decompression method and device |
| CN108303156A (en) * | 2018-02-22 | 2018-07-20 | 山东省医疗器械产品质量检验中心 | The venous samples collection container tester of arbitrary atmospheric pressure environments can be simulated |
-
2016
- 2016-06-12 CN CN201620562153.XU patent/CN205938512U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105889752A (en) * | 2016-06-12 | 2016-08-24 | 河南理工大学 | Threshold-adjustable precise decompression method and device |
| CN105889752B (en) * | 2016-06-12 | 2017-12-29 | 河南理工大学 | A kind of adjustable accurate pressure releasing method of threshold value and device |
| CN108303156A (en) * | 2018-02-22 | 2018-07-20 | 山东省医疗器械产品质量检验中心 | The venous samples collection container tester of arbitrary atmospheric pressure environments can be simulated |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20170208 Effective date of abandoning: 20171229 |