CN208703399U - A kind of gas works duct closing type device - Google Patents
A kind of gas works duct closing type device Download PDFInfo
- Publication number
- CN208703399U CN208703399U CN201821535401.7U CN201821535401U CN208703399U CN 208703399 U CN208703399 U CN 208703399U CN 201821535401 U CN201821535401 U CN 201821535401U CN 208703399 U CN208703399 U CN 208703399U
- Authority
- CN
- China
- Prior art keywords
- gas
- mouth
- gas pipeline
- blow vent
- flange
- Prior art date
- 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
Links
- 238000001514 detection method Methods 0.000 claims abstract description 40
- 239000003034 coal gas Substances 0.000 claims abstract description 17
- 238000007789 sealing Methods 0.000 claims abstract description 12
- 239000000523 sample Substances 0.000 claims description 6
- 239000007789 gas Substances 0.000 abstract description 129
- 239000000567 combustion gas Substances 0.000 abstract description 33
- 230000000903 blocking effect Effects 0.000 abstract description 11
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 8
- 239000002737 fuel gas Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 5
- 238000012423 maintenance Methods 0.000 description 4
- 239000003345 natural gas Substances 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000009423 ventilation Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 239000003915 liquefied petroleum gas Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 238000000197 pyrolysis Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
Landscapes
- Pipe Accessories (AREA)
Abstract
The utility model discloses a kind of gas works duct closing type devices, including air bag, gas pipeline and gas pipeline, the first blow vent is provided with above gas pipeline, the surface of first blow vent is equipped with first clamping plate valve, the first closure mouth is provided with above the gas pipeline of first blow vent side, the surface of first closure mouth is equipped with control valve, the gas pipeline surface of first closure mouth side is equipped with pressure gauge, detection mouth is provided with above the gas pipeline of pressure gauge side, sealing cover is installed above detection mouth, coal gas detection instrument is placed with above the gas pipeline of detection mouth side.The utility model blocks mouth, the second closure mouth, coal gas detection instrument, pressure meter structure by setting gas pipeline, the first blow vent, the second blow vent, first clamping plate valve, second clamping plate valve, air bag, first, solves the problems, such as not ensuring before closure that the normal leakproofness for conveying and blocking of combustion gas is still poor.
Description
Technical field
The utility model relates to technology of gas pipeline field, specially a kind of gas works duct closing type device.
Background technique
What gas works referred to is more than gas engineering, further includes liquefied petroleum gas, coal gas, heavy oil pyrolysis gas etc., I
Now with natural gas is relatively more, so the gas works i.e. gas engineering that typically now refer to.The model of gas works
It encloses to compare wide, big construction project, such as: long-distance transport pipes (West-East National Gas Transmission Project), door station, compressed gas station, storage tank, generally
Civil engineering includes: Gas Network of Residential District, pipeline network of fuel gas in city, gas pressure regulating station, gas pipeline installation etc. in building.Natural gas tube
Road, which refers to, is transported to urban gas center or industry from exploitation ground or treatment plant for natural gas (associated gas including oil field production)
The pipeline of enterprise customer, also known as gas pipeline.It is the mode of a large amount of delivery of fuel gas in land using gas pipeline delivery of fuel gas.
In world's pipeline overall length, natural gas line accounts for about half.In the distributing system of gas, by the shadow of various complicated factors
It rings, the underground that is either laid in also is mounted in the gas pipeline of ground, there is the danger of leakage.In addition, as people exist
Demand on gas is continuously increased in terms of production and living, the laying of combustion gas is more and more in city, the failure of gas pipeline
Also become more therewith, this just needs that the gas pipeline being currently running is reconstructed, extended and repaired, gas pipeline plugging construction phase
Ying Ersheng, the utility model are specially a kind of gas works duct closing type device.
But there are deficiencies below for existing technology:
1, gas pipeline, in order to guarantee the normal use of citizen, can not directly disconnect gas pipeline before blocking repairing
Conveying to combustion gas is repaired again after needing to be replaced fuel gas transmission pipeline before closure, guarantees normally making for citizen
With, however lack such equipment in the prior art；
2, the plugging mechanism of existing gas pipeline is incomplete, however it remains leakproofness difference and the danger that leaks
Danger causes construction hidden danger larger, and security threat is big.
Utility model content
(1) the technical issues of solving
In view of the deficiencies of the prior art, the utility model provides a kind of gas works duct closing type device, solves
It can not ensure the still poor problem of the normal leakproofness for conveying and blocking of combustion gas before closure.
(2) technical solution
To achieve the above object, the utility model provides the following technical solutions: a kind of gas works duct closing type device,
Including air bag, gas pipeline and gas pipeline, the first blow vent, the surface peace of the first blow vent are provided with above gas pipeline
Equipped with first clamping plate valve, the first closure mouth is provided with above the gas pipeline of the first blow vent side, first blocks the surface of mouth
Control valve is installed, the gas pipeline surface of the first closure mouth side is equipped with pressure gauge, on the gas pipeline of pressure gauge side
Side is provided with detection mouth, and sealing cover is equipped with above detection mouth, and combustion gas inspection is placed with above the gas pipeline of detection mouth side
Survey instrument.
Preferably, the second closure mouth is provided with above the gas pipeline of coal gas detection instrument side, second blocks the inside of mouth
Structure is consistent with the first closure mouth, is provided with the second blow vent, the second blow vent above the gas pipeline of the second closure mouth side
Surface second clamping plate valve is installed.
Preferably, gas pipeline is connected between the first blow vent and the second blow vent, the both ends of gas pipeline are all installed
There is a second flange, the upper surface of the first blow vent and the second blow vent is all equipped with first flange, first flange and second flange
Between be fixedly connected by screw bolt and nut, gasket is placed between first flange and second flange.
Preferably, shell is installed on the outside of the first closure mouth, shell and first block mouth rotation connection, the inside of shell
It is rotatably equipped with hollow screw, the inside of hollow screw is placed with gas tube, and the bottom end of gas tube is equipped with air bag, hollow screw
The top in outside is equipped with handle.
Preferably, the input terminal of pressure gauge is located at the inside of gas pipeline, and the output end of coal gas detection instrument is equipped with detection
Probe.
(3) beneficial effect
The utility model provides a kind of gas works duct closing type device, have it is following the utility model has the advantages that
(1) the utility model passes through setting gas pipeline, the first blow vent, the second blow vent, first clamping plate valve, the second folder
Plate valve enables the utility model that combustion gas is carried out steering conveying before carrying out closure gas pipeline, it is ensured that citizen's normally makes
With, avoid causing because of the maintenance of gas pipeline citizen can not normal use combustion gas, the temporary pipeline of circumscribed guarantees combustion gas
Normal conveying, practical value is higher, thus the problem of effective solution can not ensure the normal conveying of combustion gas before closure,
The first blow vent and the second blow vent are provided with above gas pipeline, and the surface of the first blow vent is equipped with first clamping plate
Valve, the surface of the second blow vent are equipped with second clamping plate valve, then connect gas pipeline and the first blow vent and the second blow vent
It connects, second flange is all installed by the both ends in gas pipeline, and the upper surface of the first blow vent and the second blow vent is all pacified
It equipped with first flange, is fixedly connected between first flange and second flange by screw bolt and nut, to realize gas pipeline
With being fixedly connected for the first blow vent and the second blow vent, and gasket is placed between first flange and second flange, into
One step ensures the leakproofness of connection, until gas pipeline installs, by the first clamping plate valve of the first ventilation discharge surface and the
The second clamping plate valve on two blow vent surfaces is opened, and is realized the intercommunication of combustion gas, is conveyed combustion gas by gas pipeline, it is ensured that
First closure mouth and the second closure mouth can also normally pass through gas pipeline delivery of fuel gas after blocking.
(2) the utility model blocks mouth, the second closure mouth, control valve, coal gas detection instrument, pressure by setting air bag, first
Power table makes the utility model be able to carry out quickly and effectively combustion gas closure, avoids the leakage of combustion gas, it is ensured that without any combustion when maintenance
Gas leakage improves the safety of service work, so that the problem that the leakproofness that blocks of effective solution is still poor, will inflate
One end of pipe connects air bag, and the other end passes through the top that hollow screw is located at hollow screw, in turn, housing into rotation is installed on the
After one blocks on mouth and the second closure mouth, open control valve makes air bag be located at gas pipeline by rotatable handle hollow screw
Inside connects extraneous charger using gas tube, is inflated by gas tube to inside air bag, makes air bag in gas pipeline
Portion's expansion, is closely bonded on the inner wall of gas pipeline, realizes to the sealing blocking of gas pipeline, thus by first block mouth and
It is blocked completely inside gas pipeline below second closure mouth, then opens the sealing cover of detection discharge surface, make the first closure
Mouth blocks the combustion gas discharge inside the gas pipeline between mouth second, then observes the numerical value of pressure gage surface, when numerical value is normal
When, the detection probe of coal gas detection instrument output end is placed in inside gas pipeline by detection mouth, it is ensured that it is remained without combustion gas,
The repairing work that just can be carried out gas pipeline greatly improves safety, improves the safety guarantee to staff.
Detailed description of the invention
Fig. 1 is the schematic diagram of internal structure of the utility model；
Fig. 2 is the inflated condition structural schematic diagram of the utility model；
Fig. 3 is the structural schematic diagram of the utility model；
Fig. 4 is schematic enlarged-scale view at the utility model A.
In figure: 1, air bag；2, gas tube；3, first clamping plate valve；4, the first blow vent；5, gas pipeline；6, it first blocks
Mouthful；7, hollow screw；8, handle；9, shell；10, control valve；11, pressure gauge；12, sealing cover；13, detection mouth；14, combustion gas is examined
Survey instrument；15, detection probe；16, gas pipeline；17, second mouth is blocked；18, the second blow vent；19, second clamping plate valve；20,
One flange；21, second flange；22, gasket；23, bolt；24, nut.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, fall within the protection scope of the utility model.
As shown in Figs 1-4, the utility model provides a kind of technical solution: a kind of gas works duct closing type device, packet
Air bag 1, gas pipeline 5 and gas pipeline 16 are included, the top of gas pipeline 16 is provided with the first blow vent 4, the first blow vent 4
Surface is equipped with first clamping plate valve 3, and gas pipeline 5, gas pipeline 5 are connected between the first blow vent 4 and the second blow vent 18
Both ends second flange 21 is all installed, the upper surface of the first blow vent 4 and the second blow vent 18 is all equipped with first flange 20,
Be fixedly connected with nut 24 between first flange 20 and second flange 21 by bolt 23, first flange 20 and second flange 21 it
Between be placed with gasket 22, the top of gas pipeline 16 is provided with the first blow vent 4 and the second blow vent 18, and the first ventilation
The surface of mouth 4 is equipped with first clamping plate valve 3, and the surface of the second blow vent 18 is equipped with second clamping plate valve 19, then by appendix
Road 5 is connect with the first blow vent 4 and the second blow vent 18, by being all equipped with second flange 21 at the both ends of gas pipeline 5, and
The upper surface of first blow vent 4 and the second blow vent 18 is all equipped with first flange 20, first flange 20 and second flange 21 it
Between be fixedly connected with nut 24 by bolt 23, to realize gas pipeline 5 and the first blow vent 4 and the second blow vent 18
It is fixedly connected, and is placed with gasket 22 between first flange 20 and second flange 21, further ensure the sealing of connection
Property, until gas pipeline 5 installs, by the of 18 surface of the first clamping plate valve 3 on 4 surface of the first blow vent and the second blow vent
Second splint valve 19 is opened, and realizes the intercommunication of combustion gas, conveys combustion gas by gas pipeline 5, it is ensured that blocks 6 He of mouth first
Second closure mouth 17 can also normally pass through 5 delivery of fuel gas of gas pipeline after blocking, and the utility model is enable to be sealed
Combustion gas is subjected to steering conveying before stifled gas pipeline 16, it is ensured that the normal use of citizen avoids due to the maintenance of gas pipeline 16
Cause citizen can not normal use combustion gas, the temporary pipeline of circumscribed guarantees the normal conveying of combustion gas, and practical value is higher, first
The first closure mouth 6 is provided with above the gas pipeline 16 of 4 side of blow vent, the surface of the first closure mouth 6 is equipped with control valve 10,
The outside of first closure mouth 6 is equipped with shell 9, and shell 9 and first block mouth 6 and be rotatablely connected, and the inner rotation of shell 9 is equipped with
Hollow screw 7, the inside of hollow screw 7 are placed with gas tube 2, and the bottom end of gas tube 2 is equipped with air bag 1,7 outside of hollow screw
Top handle 8 is installed, 16 surface of gas pipeline of the first closure 6 side of mouth is equipped with pressure gauge 11, the type of pressure gauge 11
Number be YB-150 pressure gauge, belong to the prior art, detection mouth 13 be provided with above the gas pipeline 16 of 11 side of pressure gauge, detect
The top of mouth 13 is equipped with sealing cover 12, is placed with coal gas detection instrument 14, combustion gas above the gas pipeline 16 of 13 side of detection mouth
The model DE63M/snooper-4 coal gas detection instrument of detector 14, belongs to the prior art, and the input terminal of pressure gauge 11 is located at combustion
The inside of feed channel 16, the output end of coal gas detection instrument 14 are equipped with detection probe 15, the fuel gas conduit of 14 side of coal gas detection instrument
The second closure mouth 17 is provided with above road 16, second, which blocks the internal structure of mouth 17 and first, blocks mouth 6 unanimously, and second blocks mouth
The second blow vent 18 is provided with above the gas pipeline 16 of 17 sides, the surface of the second blow vent 18 is equipped with second clamping plate valve
19, one end of gas tube 2 is connected into air bag 1, the other end passes through the top that hollow screw 7 is located at hollow screw 7, in turn, by shell
The rotational installation of body 9 opens control valve 10, passes through 8 rotary hollow screw rod of handle after first blocks mouth 6 and second blocks on mouth 17
7, so that air bag 1 is located at the inside of gas pipeline 16, extraneous charger is connected using gas tube 2, by gas tube 2 to air bag
1 inner inflatable makes air bag 1 in 16 internal expansion of gas pipeline, is closely bonded on the inner wall of gas pipeline 16, realizes to combustion gas
The sealing blocking of pipeline 16, so that progress is complete inside the gas pipeline 16 for blocking 17 lower section of mouth 6 and the second closure mouth for first
It blocks, then opens the sealing cover 12 on 13 surface of detection mouth, make the gas pipeline 16 between the first closure mouth 6 and the second closure mouth 17
Internal combustion gas discharge, then the numerical value on 11 surface of pressure gauge is observed, when numerical value is normal, by the inspection of 14 output end of coal gas detection instrument
Probing head 15 is placed in inside gas pipeline 16 by detection mouth 13, it is ensured that is remained without combustion gas, just be can be carried out gas pipeline 16
Repairing work, greatly improve safety, improve the safety guarantee to staff, be able to carry out the utility model fastly
Fast effective combustion gas blocks, and avoids the leakage of combustion gas, it is ensured that without any gas leakage when maintenance, improve the safety of service work
Property.
In use, the utility model is provided with the first blow vent 4 and the second blow vent 18 in the top of gas pipeline 16, and
The surface of first blow vent 4 is equipped with first clamping plate valve 3, and the surface of the second blow vent 18 is equipped with second clamping plate valve 19, then
Gas pipeline 5 is connect with the first blow vent 4 and the second blow vent 18, by being all equipped with second at the both ends of gas pipeline 5
Flange 21, and the upper surface of the first blow vent 4 and the second blow vent 18 is all equipped with first flange 20, first flange 20 and second
It is fixedly connected with nut 24 between flange 21 by bolt 23, is led to realize gas pipeline 5 with the first blow vent 4 and second
Port 18 is fixedly connected, and gasket 22 is placed between first flange 20 and second flange 21, the company of further ensuring
The leakproofness connect, until gas pipeline 5 installs, by the first clamping plate valve 3 on 4 surface of the first blow vent and the second blow vent 18
The second clamping plate valve 19 on surface is opened, and realizes the intercommunication of combustion gas, conveys combustion gas by gas pipeline 5, in the first ventilation
Mouthfuls 4 and 18 inside of the second blow vent gas pipeline 16 above be respectively arranged with the first closure mouth 6 and second and block mouth 17, second
It blocks the internal structure of mouth 17 and first and blocks that mouth 6 is consistent, shell 9 is installed in the outside of the first closure mouth 6, shell 9 and the
One, which blocks mouth 6, is rotatablely connected, and the inner rotation of shell 9 is equipped with hollow screw 7, and the inside of hollow screw 7 is placed with gas tube
2, the bottom end of gas tube 2 is equipped with air bag 1, and the top in 7 outside of hollow screw is equipped with handle 8, one end of gas tube 2 is connected
Air bag 1, the other end pass through the top that hollow screw 7 is located at hollow screw 7, in turn, the rotational installation of shell 9 are blocked mouth in first
6 and second block on mouth 17 after, opening control valve 10 by 8 rotary hollow screw rod 7 of handle makes air bag 1 be located at gas pipeline 16
Inside, connect extraneous charger using gas tube 2 makes air bag 1 in combustion gas by gas tube 2 to 1 inner inflatable of air bag
16 internal expansion of pipeline is closely bonded on the inner wall of gas pipeline 16, realizes the sealing blocking to gas pipeline 16, thus will
It is blocked completely inside the gas pipeline 16 of 17 lower section of first closure mouth 6 and the second closure mouth, then opens 13 surface of detection mouth
Sealing cover 12, the first closure mouth 6 and the second combustion gas for blocking inside gas pipeline 16 between mouth 17 is discharged, then observe pressure
The numerical value on 11 surface of power table is put the detection probe 15 of 14 output end of coal gas detection instrument by detection mouth 13 when numerical value is normal
It is placed in inside gas pipeline 16, it is ensured that remained without combustion gas, just can be carried out the repairing work of gas pipeline 16, greatly improve
Safety improves the safety guarantee to staff.
It can to sum up obtain, the utility model passes through setting gas pipeline 5, the first blow vent 4, the second blow vent 18, first folder
Plate valve 3, second clamping plate valve 19, air bag 1, first block mouth 6, second and block mouth 17, coal gas detection instrument 14,11 structure of pressure gauge,
Solve the problems, such as not ensuring before closure that the normal leakproofness for conveying and blocking of combustion gas is still poor.
It should be noted that, in this document, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to
Non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or equipment
Intrinsic element.
While there has been shown and described that the embodiments of the present invention, for the ordinary skill in the art,
It is understood that these embodiments can be carried out with a variety of variations in the case where not departing from the principles of the present invention and spirit, repaired
Change, replacement and variant, the scope of the utility model is defined by the appended claims and the equivalents thereof.
Claims (5)
1. a kind of gas works duct closing type device, including air bag (1), gas pipeline (5) and gas pipeline (16), feature
It is: is provided with above gas pipeline (16) the first blow vent (4), the surface of the first blow vent (4) is equipped with first clamping plate
Gas pipeline (16) top of valve (3), the first blow vent (4) side is provided with the first closure mouth (6), and first blocks mouth (6)
Surface is equipped with control valve (10), and gas pipeline (16) surface of first closure mouth (6) side is equipped with pressure gauge (11), pressure
It is provided with detection mouth (13) above the gas pipeline (16) of table (11) side, detection mouth is equipped with sealing cover above (13)
(12), coal gas detection instrument (14) are placed with above the gas pipeline (16) of detection mouth (13) side.
2. a kind of gas works duct closing type device according to claim 1, it is characterised in that: coal gas detection instrument (14)
The second closure mouth (17) is provided with above the gas pipeline (16) of side, second, which blocks the internal structure of mouth (17) and first, blocks
Mouth (6) unanimously, is provided with the second blow vent (18), the second blow vent above the gas pipeline (16) of second closure mouth (17) side
(18) surface is equipped with second clamping plate valve (19).
3. a kind of gas works duct closing type device according to claim 1, it is characterised in that: the first blow vent (4)
And second be connected with gas pipeline (5) between blow vent (18), the both ends of gas pipeline (5) are all equipped with second flange (21),
The upper surface of first blow vent (4) and the second blow vent (18) is all equipped with first flange (20), first flange (20) and second
It is fixedly connected by bolt (23) with nut (24) between flange (21), is placed between first flange (20) and second flange (21)
There are gasket (22).
4. a kind of gas works duct closing type device according to claim 1, it is characterised in that: first blocks mouth (6)
Outside be equipped with shell (9), shell (9) blocks mouth (6) rotation connection with first, during the inner rotation of shell (9) is equipped with
Empty screw rod (7), the inside of hollow screw (7) are placed with gas tube (2), and the bottom end of gas tube (2) is equipped with air bag (1), hollow
Top on the outside of screw rod (7) is equipped with handle (8).
5. a kind of gas works duct closing type device according to claim 1, it is characterised in that: pressure gauge (11) it is defeated
Enter the inside that end is located at gas pipeline (16), the output end of coal gas detection instrument (14) is equipped with detection probe (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821535401.7U CN208703399U (en) | 2018-09-19 | 2018-09-19 | A kind of gas works duct closing type device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821535401.7U CN208703399U (en) | 2018-09-19 | 2018-09-19 | A kind of gas works duct closing type device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208703399U true CN208703399U (en) | 2019-04-05 |
Family
ID=65947023
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821535401.7U Expired - Fee Related CN208703399U (en) | 2018-09-19 | 2018-09-19 | A kind of gas works duct closing type device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208703399U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112610797A (en) * | 2020-12-02 | 2021-04-06 | 西安石油大学 | Protection device and protection method for damage and fracture of gas transmission pipeline |
-
2018
- 2018-09-19 CN CN201821535401.7U patent/CN208703399U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112610797A (en) * | 2020-12-02 | 2021-04-06 | 西安石油大学 | Protection device and protection method for damage and fracture of gas transmission pipeline |
| CN112610797B (en) * | 2020-12-02 | 2023-03-10 | 西安石油大学 | Protection device and protection method for damage and fracture of gas transmission pipeline |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN209444898U (en) | A kind of natural gas Double-sleeve device | |
| CN202194628U (en) | Gas tree and gas well surface construction integrated skid integrated device | |
| CN208703399U (en) | A kind of gas works duct closing type device | |
| CN205013938U (en) | City tap water pipeline water connection pipe construction structures that does not stop | |
| CN101975078A (en) | Gas extraction drilling coupling device and installation and use method thereof | |
| CN112012782A (en) | Advanced closed area gas prevention and control technology for air inlet and return roadway of fully mechanized caving face | |
| CN115321081A (en) | An integrated underground water sealing rock cave oil storage process system | |
| CN102426084A (en) | Non-metal pipeline hydraulic pressure seepage verifying attachment | |
| CN206458953U (en) | Duct closing type device | |
| CN108253300A (en) | Underground pressure regulating box | |
| CN202362121U (en) | Non-metal pipeline hydraulic pressure leakage inspection device | |
| CN204649248U (en) | Underground batch meter | |
| CN209803039U (en) | Testing device for combustible gas explosion flow field in confined space under water storage condition | |
| CN102155604A (en) | Large-aperture compressed natural gas storage well and installation method thereof | |
| CN109164104A (en) | A kind of abandoned mine goaf gas-liquid two-phase adverse current visual Simulation pilot system | |
| CN204729911U (en) | A kind of buried spherical tank group | |
| CN105507866B (en) | A fracturing wellhead device | |
| CN206850393U (en) | A kind of power construction cable laying erecting device | |
| CN209385173U (en) | Water system is blown to drilling under coal mine | |
| CN207005748U (en) | Condensate water drainage arrangement under gas pipeline operating condition | |
| CN219588720U (en) | Underground mine fuel vertical conveying system | |
| CN209129115U (en) | Shunt assembly and separate system | |
| CN206396267U (en) | A kind of blast furnace gas pipeline leakage repairing device | |
| CN215979472U (en) | Gas leakage prevention and control system for abandoned mine shaft | |
| CN205348220U (en) | Double -barrelled and plastics well leak hunting facility of collapsible loess area plastics |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190405 Termination date: 20200919 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |