CN203264568U - Gas mixing device - Google Patents

Gas mixing device Download PDF

Info

Publication number
CN203264568U
CN203264568U CN201320289959.2U CN201320289959U CN203264568U CN 203264568 U CN203264568 U CN 203264568U CN 201320289959 U CN201320289959 U CN 201320289959U CN 203264568 U CN203264568 U CN 203264568U
Authority
CN
China
Prior art keywords
valve
pipeline
concentration
shut
model
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 - Lifetime
Application number
CN201320289959.2U
Other languages
Chinese (zh)
Inventor
周海军
陈哲
李达汉
张树森
王秋生
王运峰
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
China Coal Handan Design Engineering Co Ltd
Original Assignee
China Coal Handan Design Engineering Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by China Coal Handan Design Engineering Co Ltd filed Critical China Coal Handan Design Engineering Co Ltd
Priority to CN201320289959.2U priority Critical patent/CN203264568U/en
Application granted granted Critical
Publication of CN203264568U publication Critical patent/CN203264568U/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/30—Use of alternative fuels, e.g. biofuels

Abstract

本实用新型公开了一种瓦斯混合装置，主要由高浓度瓦斯入口、截断阀、调压箱、型号调压箱-RX、压力表、放散管、安全阀、流量计、自动调节阀、温度计、浓度计、低浓度瓦斯入口、阻火器、型号阻火器-GZDⅠ、止回阀、静态混合器、型号静态混合器-SX、混合后的瓦斯出口和管道组成，其高浓度瓦斯入口连接管道，管道连接截断阀，截断阀连接管道，管道连接调压箱，调压箱连接管道。本实用新型混合后的低浓度瓦斯其浓度符合国家的规定要求，不在瓦斯爆炸极限内，保证了装置系统安全。本实用新型与文氏管等传统的混合设备相比，具有流程简单，结构紧凑、能耗小、投资少、操作弹性大、维修量小、可靠性高、故障率低、混合性能好的优点。

The utility model discloses a gas mixing device, which mainly consists of a high-concentration gas inlet, a shut-off valve, a pressure regulating box, a model pressure regulating box-RX, a pressure gauge, a discharge pipe, a safety valve, a flow meter, an automatic regulating valve, a thermometer, Concentration meter, low-concentration gas inlet, flame arrester, model flame arrester-GZDI, check valve, static mixer, model static mixer-SX, mixed gas outlet and pipeline, and its high-concentration gas inlet is connected to pipeline, pipeline Connect the shut-off valve, the shut-off valve is connected to the pipeline, the pipeline is connected to the pressure regulating box, and the pressure regulating box is connected to the pipeline. The concentration of the mixed low-concentration gas of the utility model meets the requirements of the state and is not within the gas explosion limit, thereby ensuring the safety of the device system. Compared with traditional mixing equipment such as Venturi tubes, the utility model has the advantages of simple process, compact structure, low energy consumption, low investment, large operating flexibility, small maintenance, high reliability, low failure rate and good mixing performance. .

Description

一种瓦斯混合装置A gas mixing device

技术领域 technical field

本实用新型涉及一种机械装置，尤其涉及一种煤矿井下抽采瓦斯与地面钻井抽采瓦斯或天然气的混合装置。  The utility model relates to a mechanical device , in particular to a mixing device for underground gas extraction in coal mines and surface drilling for gas or natural gas extraction.

背景技术 Background technique

目前，我国瓦斯抽采一般采用两种方式：一是地面钻井抽采，二是煤矿井下瓦斯抽采。地面钻井抽采的瓦斯浓度高，可直接利用，但是不同的钻井抽采的瓦斯浓度有差别，混合在一起易引起浓度的波动，对利用有一定的影响。煤矿井下瓦斯抽采的瓦斯浓度差别较大，浓度高的可以直接利用，浓度低的则不可以直接利用。在保障安全的前提下，如何将低浓度瓦斯与高浓度的瓦斯进行混合，形成浓度稳定的混合气体，提高煤层气体的利用率，减少瓦斯的直接排放，是急需要解决的问题。  At present, my country generally adopts two methods for gas extraction: one is ground drilling and extraction, and the other is underground gas extraction in coal mines. The gas concentration extracted from surface drilling is high and can be used directly. However, the gas concentration extracted from different drilling wells is different, and mixing together will easily cause concentration fluctuations, which will have a certain impact on utilization. The concentration of gas produced by underground gas drainage in coal mines varies greatly. The gas with high concentration can be directly used, while the gas with low concentration cannot be directly used. Under the premise of ensuring safety, how to mix low-concentration gas and high-concentration gas to form a mixed gas with stable concentration, improve the utilization rate of coalbed gas, and reduce the direct emission of gas is an urgent problem to be solved. the

发明内容 Contents of the invention

为了克服现有技术的不足，解决煤矿井下瓦斯抽采的瓦斯浓度差别较大，浓度高的可以直接利用，浓度低的则不可以直接利用的问题，提供一种瓦斯混合装置。  In order to overcome the deficiencies of the prior art and solve the problem that the gas concentration of underground gas drainage in coal mines varies greatly, the gas with high concentration can be directly used, and the gas with low concentration cannot be directly used, a gas mixing device is provided. the

本实用新型解决其技术问题所采用的技术方案是：  The technical scheme that the utility model solves its technical problem adopts is:

一种瓦斯混合装置，主要由高浓度瓦斯入口、截断阀、调压箱、型号调压箱-RX、压力表、放散管、安全阀、流量计、自动调节阀、温度计、浓度计、低浓度瓦斯入口、阻火器、型号阻火器-GZDⅠ、止回阀、静态混合器、型号静态混合器-SX、混合后的瓦斯出口和管道组成，其高浓度瓦斯入口连接管道，管道连接截断阀，截断阀连接管道，管道连接调压箱，调压箱连接管道，管道连接流量计一端，调压箱与流量计连接的管道上依次设置压力表、截断阀和安全阀，截断阀上方连接阻火器，阻火器上部连接放散管，安全阀上方也连接阻火器，阻火器上部也连接放散管，流量计另一端连接管道，管道连接自动调节阀，自动调节阀一路通过管道，连接截断阀，自动调节阀另一路通过管道连接浓度计，浓度计通过管道连接混合后的瓦斯出口，截断阀通过管道连接静态混合器，截断阀与静态混合器连接的管道上依次设置温度计和浓度计；低浓度瓦斯入口通过管道依次连接阻火器、止回阀、截断阀和流量计一端，截断阀与流量计一端连接的管道上方依次设置截断阀、压力表、温度计和浓度计，截断阀上部连接阻火器，阻火器上部连接放散管，流量计另一端通过管道连接静态混合器，静态混合器通过管道连接浓度计，浓度计通过管道连接混合后的瓦斯出口。 A gas mixing device, mainly composed of a high-concentration gas inlet, a shut-off valve, a pressure regulating box, a model pressure regulating box-RX, a pressure gauge, a release pipe, a safety valve, a flow meter, an automatic regulating valve, a thermometer, a concentration meter, and a low-concentration gas Gas inlet, flame arrester, model flame arrester-GZDⅠ, check valve, static mixer, model static mixer-SX, mixed gas outlet and pipeline, the high-concentration gas inlet is connected to the pipeline, the pipeline is connected to the shut-off valve, and the shut-off The valve is connected to the pipeline, the pipeline is connected to the pressure regulating box, the pressure regulating box is connected to the pipeline, and the pipeline is connected to one end of the flowmeter. The upper part of the flame arrester is connected to the release pipe, and the top of the safety valve is also connected to the flame arrester, and the upper part of the flame arrester is also connected to the release pipe. The other way is connected to the concentration meter through the pipeline, the concentration meter is connected to the mixed gas outlet through the pipeline, the shut-off valve is connected to the static mixer through the pipeline, and the thermometer and the concentration meter are arranged in sequence on the pipeline connected between the shut-off valve and the static mixer; the low-concentration gas inlet passes through The pipeline is connected to the flame arrester, check valve, shut-off valve and one end of the flowmeter in sequence. The shut-off valve, pressure gauge, thermometer and concentration meter are arranged in turn above the pipeline connected to the shut-off valve and the flowmeter. The upper part of the shut-off valve is connected to the flame arrester, and the upper part of the flame arrester Connect the discharge pipe, the other end of the flow meter is connected to the static mixer through the pipeline, the static mixer is connected to the concentration meter through the pipeline, and the concentration meter is connected to the mixed gas outlet through the pipeline.

本实用新型的有益效果是：The beneficial effects of the utility model are:

1、本实用新型混合后的低浓度瓦斯其浓度符合国家的规定要求，不在瓦斯爆炸极限内，保证了装置系统安全。 1. The concentration of the low-concentration gas mixed in the utility model meets the national regulations and is not within the gas explosion limit, which ensures the safety of the device system.

 2、本实用新型与文氏管等传统的混合设备相比，具有流程简单，结构紧凑、能耗小、投资少、操作弹性大、维修量小、可靠性高、故障率低、混合性能好的优点。  2. Compared with traditional mixing equipment such as Venturi tube, the utility model has the advantages of simple process, compact structure, low energy consumption, low investment, large operation flexibility, small maintenance, high reliability, low failure rate and good mixing performance The advantages. the

 附图说明     Description of drawings

图1为本实用新型瓦斯混合装置图。 Fig. 1 is a diagram of the utility model gas mixing device.

具体实施方式 Detailed ways

图1中，一种瓦斯混合装置，主要由高浓度瓦斯入口1、截断阀2、调压箱3、型号调压箱-RX、压力表4、放散管5、安全阀6、流量计7、自动调节阀8、温度计9、浓度计10、低浓度瓦斯入口11、阻火器12、型号阻火器-GZDⅠ、止回阀13、静态混合器14、型号静态混合器-SX、混合后的瓦斯出口15和管道16组成，其高浓度瓦斯入口1连接管道16，管道16连接截断阀2，截断阀2连接管道16，管道16连接调压箱3，调压箱3连接管道16，管道16连接流量计7一端，调压箱3与流量计7连接的管道16上依次设置压力表4、截断阀2和安全阀6，截断阀2上方连接阻火器12，阻火器12上部连接放散管5，安全阀6上方也连接阻火器12，阻火器12上部也连接放散管5，流量计7另一端连接管道16，管道16连接自动调节阀8，自动调节阀8一路通过管道16，连接截断阀2，自动调节阀8另一路通过管道16连接浓度计10，浓度计10通过管道16连接混合后的瓦斯出口15，截断阀2通过管道16连接静态混合器14，截断阀2与静态混合器14连接的管道16上依次设置温度计9和浓度计10；低浓度瓦斯入口11通过管道16依次连接阻火器12、止回阀13、截断阀2和流量计7一端，截断阀2与流量计7一端连接的管道16上方依次设置截断阀2、压力表4、温度计9和浓度计10，截断阀2上部连接阻火器12，阻火器12上部连接放散管5，流量计7另一端通过管道16连接静态混合器14，静态混合器14通过管道16连接浓度计10，浓度计10通过管道16连接混合后的瓦斯出口15。  In Fig. 1, a gas mixing device is mainly composed of a high-concentration gas inlet 1, a shut-off valve 2, a pressure regulating box 3, a model pressure regulating box-RX, a pressure gauge 4, a discharge pipe 5, a safety valve 6, a flow meter 7, Automatic regulating valve 8, thermometer 9, concentration meter 10, low concentration gas inlet 11, flame arrester 12, model flame arrester-GZDI, check valve 13, static mixer 14, model static mixer-SX, mixed gas outlet 15 and pipeline 16, its high-concentration gas inlet 1 is connected to pipeline 16, pipeline 16 is connected to shut-off valve 2, shut-off valve 2 is connected to pipeline 16, pipeline 16 is connected to pressure regulating box 3, pressure regulating box 3 is connected to pipeline 16, and pipeline 16 is connected to flow rate At one end of the meter 7, a pressure gauge 4, a cut-off valve 2 and a safety valve 6 are arranged in sequence on the pipeline 16 connecting the pressure regulating box 3 and the flow meter 7, the top of the cut-off valve 2 is connected to the flame arrester 12, and the upper part of the flame arrester 12 is connected to the discharge pipe 5, which is safe The top of the valve 6 is also connected to the flame arrester 12, the upper part of the flame arrester 12 is also connected to the discharge pipe 5, the other end of the flow meter 7 is connected to the pipeline 16, the pipeline 16 is connected to the automatic regulating valve 8, and the automatic regulating valve 8 passes through the pipeline 16 all the way to connect the shut-off valve 2, The other way of the automatic regulating valve 8 is connected to the concentration meter 10 through the pipeline 16, the concentration meter 10 is connected to the mixed gas outlet 15 through the pipeline 16, the shut-off valve 2 is connected to the static mixer 14 through the pipeline 16, and the shut-off valve 2 is connected to the static mixer 14 A thermometer 9 and a concentration meter 10 are sequentially installed on the pipeline 16; the low-concentration gas inlet 11 is sequentially connected to the flame arrester 12, the check valve 13, the shut-off valve 2 and one end of the flow meter 7 through the pipeline 16, and the shut-off valve 2 is connected to the flow meter 7 at one end A cut-off valve 2, a pressure gauge 4, a thermometer 9 and a concentration meter 10 are arranged in sequence above the pipe 16, the upper part of the cut-off valve 2 is connected to the flame arrester 12, the upper part of the flame arrester 12 is connected to the discharge pipe 5, and the other end of the flow meter 7 is connected to the static mixer through the pipe 16 14. The static mixer 14 is connected to the concentration meter 10 through the pipeline 16, and the concentration meter 10 is connected to the mixed gas outlet 15 through the pipeline 16. the

工作原理：working principle:

高浓度瓦斯（地面抽采的瓦斯、井下抽采的浓度较高的瓦斯、天然气），通过调压箱3后（根据压力等级需要设置），经流量计7计量后，进入自动调节阀8，经过自动调节阀8后的高浓度瓦斯，进入静态混合器14，等待与低浓度瓦斯进行充分混合。 High-concentration gas (gas extracted from the ground, gas with high concentration extracted from underground, and natural gas) passes through the surge tank 3 (set according to the pressure level), is measured by the flow meter 7, and then enters the automatic regulating valve 8. After passing through the automatic regulating valve 8, the high-concentration gas enters the static mixer 14 and waits to be fully mixed with the low-concentration gas.

煤矿井下抽采的低浓度瓦斯，经阻火器12、止回阀13后，经流量计7，进入静态混合器14，低浓度瓦斯与高浓度瓦斯汇合。  The low-concentration gas extracted from underground coal mines passes through the flame arrester 12, the check valve 13, the flow meter 7, and enters the static mixer 14, where the low-concentration gas and high-concentration gas merge. the

静态混合器14后设置有浓度测量计10，根据设置的浓度，控制高浓度瓦斯管中的自动调节阀8，调整自动调节阀8的开启大小，控制高浓度瓦斯的流量，使混合后的瓦斯浓度维持在设定的范围内，满足用户使用要求。  A concentration meter 10 is installed behind the static mixer 14. According to the set concentration, the automatic regulating valve 8 in the high-concentration gas pipe is controlled, the opening size of the automatic regulating valve 8 is adjusted, and the flow rate of the high-concentration gas is controlled to make the mixed gas The concentration is maintained within the set range to meet user requirements. the

为保证安全，在高浓度瓦斯管道中，设置有安全放散装置放散管5和安全阀6；在低浓度瓦斯管道上，设置有安全放散装置放散管5；低浓度瓦斯管道中的瓦斯浓度，控制在瓦斯爆炸极限的上线以上，保证低浓度瓦斯管道的安全。  In order to ensure safety, in the high-concentration gas pipeline, a safety release device discharge pipe 5 and a safety valve 6 are installed; in the low-concentration gas pipeline, a safety release device discharge pipe 5 is provided; the gas concentration in the low-concentration gas pipeline is controlled Above the upper limit of the gas explosion limit, the safety of low-concentration gas pipelines is guaranteed. the

Claims (1)

1.一种瓦斯混合装置，主要由高浓度瓦斯入口（1）、截断阀（2）、调压箱（3）、型号调压箱-RX、压力表（4）、放散管（5）、安全阀（6）、流量计（7）、自动调节阀（8）、温度计（9）、浓度计（10）、低浓度瓦斯入口（11）、阻火器（12）、型号阻火器-GZDⅠ、止回阀（13）、静态混合器（14）、型号静态混合器-SX、混合后的瓦斯出口（15）和管道（16）组成，其特征在于：高浓度瓦斯入口（1）连接管道（16），管道（16）连接截断阀（2），截断阀（2）连接管道（16），管道（16）连接调压箱（3），调压箱（3）连接管道（16），管道（16）连接流量计（7）一端，调压箱（3）与流量计（7）连接的管道（16）上依次设置压力表（4）、截断阀（2）和安全阀（6），截断阀（2）上方连接阻火器（12），阻火器（12）上部连接放散管（5），安全阀（6）上方也连接阻火器（12），阻火器（12）上部也连接放散管（5），流量计（7）另一端连接管道（16），管道（16）连接自动调节阀（8），自动调节阀（8）一路通过管道（16），连接截断阀（2），自动调节阀（8）另一路通过管道（16）连接浓度计（10），浓度计（10）通过管道（16）连接混合后的瓦斯出口（15），截断阀（2）通过管道（16）连接静态混合器（14），截断阀（2）与静态混合器（14）连接的管道（16）上依次设置温度计（9）和浓度计（10）；低浓度瓦斯入口（11）通过管道（16）依次连接阻火器（12）、止回阀（13）、截断阀（2）和流量计（7）一端，截断阀（2）与流量计（7）一端连接的管道（16）上方依次设置截断阀（2）、压力表（4）、温度计（9）和浓度计（10），截断阀（2）上部连接阻火器（12），阻火器（12）上部连接放散管（5），流量计（7）另一端通过管道（16）连接静态混合器（14），静态混合器（14）通过管道（16）连接浓度计（10），浓度计（10）通过管道（16）连接混合后的瓦斯出口（15）。 1. A gas mixing device, mainly composed of high-concentration gas inlet (1), shut-off valve (2), pressure regulating box (3), model pressure regulating box-RX, pressure gauge (4), release pipe (5), Safety valve (6), flow meter (7), automatic regulating valve (8), thermometer (9), concentration meter (10), low concentration gas inlet (11), flame arrester (12), model flame arrester-GZDI, Check valve (13), static mixer (14), model static mixer-SX, mixed gas outlet (15) and pipeline (16), characterized in that: high-concentration gas inlet (1) is connected to pipeline ( 16), the pipeline (16) is connected to the shut-off valve (2), the shut-off valve (2) is connected to the pipeline (16), the pipeline (16) is connected to the pressure regulating box (3), the pressure regulating box (3) is connected to the pipeline (16), the pipeline (16) Connect one end of the flow meter (7), and set the pressure gauge (4), shut-off valve (2) and safety valve (6) on the pipeline (16) connected to the pressure regulating box (3) and the flow meter (7) in sequence, The flame arrester (12) is connected above the cut-off valve (2), and the upper part of the flame arrester (12) is connected to the discharge pipe (5), and the flame arrester (12) is also connected above the safety valve (6), and the upper part of the flame arrester (12) is also connected to the discharge pipe (5), the other end of the flow meter (7) is connected to the pipe (16), the pipe (16) is connected to the automatic regulating valve (8), and the automatic regulating valve (8) passes through the pipe (16) all the way, connected to the shut-off valve (2), and automatically The other way of the regulating valve (8) is connected to the concentration meter (10) through the pipeline (16), the concentration meter (10) is connected to the mixed gas outlet (15) through the pipeline (16), and the cut-off valve (2) is connected through the pipeline (16) The static mixer (14), the shut-off valve (2) and the pipeline (16) connected to the static mixer (14) are sequentially provided with a thermometer (9) and a concentration meter (10); the low-concentration gas inlet (11) passes through the pipeline (16) ) are connected in turn to the flame arrester (12), check valve (13), cut-off valve (2) and one end of the flow meter (7), and the top of the pipe (16) connecting the cut-off valve (2) to the flow meter (7) is arranged in sequence Cut-off valve (2), pressure gauge (4), thermometer (9) and concentration meter (10), the upper part of the cut-off valve (2) is connected to the flame arrester (12), the upper part of the flame arrester (12) is connected to the discharge pipe (5), the flow rate The other end of the meter (7) is connected to the static mixer (14) through the pipeline (16), and the static mixer (14) is connected to the concentration meter (10) through the pipeline (16), and the concentration meter (10) is connected through the pipeline (16). gas outlet (15).
CN201320289959.2U 2013-05-24 2013-05-24 Gas mixing device Expired - Lifetime CN203264568U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201320289959.2U CN203264568U (en) 2013-05-24 2013-05-24 Gas mixing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201320289959.2U CN203264568U (en) 2013-05-24 2013-05-24 Gas mixing device

Publications (1)

Publication Number Publication Date
CN203264568U true CN203264568U (en) 2013-11-06

Family

ID=49495062

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201320289959.2U Expired - Lifetime CN203264568U (en) 2013-05-24 2013-05-24 Gas mixing device

Country Status (1)

Country Link
CN (1) CN203264568U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103285756A (en) * 2013-05-24 2013-09-11 中煤邯郸设计工程有限责任公司 Gas mixing device
CN104329672A (en) * 2014-10-31 2015-02-04 中国神华能源股份有限公司 Device and method for co-firing mine gas and natural gas

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103285756A (en) * 2013-05-24 2013-09-11 中煤邯郸设计工程有限责任公司 Gas mixing device
CN104329672A (en) * 2014-10-31 2015-02-04 中国神华能源股份有限公司 Device and method for co-firing mine gas and natural gas

Similar Documents

Publication Publication Date Title
CN104879094B (en) A wellbore simulation experiment device for downhole throttling gas wells
CN202803173U (en) Static gas mixing device
CN103285756A (en) Gas mixing device
CN202418740U (en) Improved water seal system for torch gas
CN205101027U (en) Mining foam dust settling device
CN203264568U (en) Gas mixing device
CN104358547B (en) A gas-liquid separation casing gas recovery device
CN104100238B (en) It penetrates and draws booster-type casing gas recovering device
CN204646189U (en) A kind of high-pressure spray formula associated gas reclaimer
CN203155194U (en) Aerosol generator
CN201620836U (en) High-pressure gas well draws and penetrates dividing open gas well mining devices
CN206458451U (en) A kind of unpowered gas-liquid natural separation device of coal bed gas well
CN102748061A (en) Mining surfactant automatic adding device
CN203370473U (en) Gas-liquid mixing device
CN203533561U (en) Water-sealed tank
CN201620865U (en) Oil-gas separation buffer tank capable of controlling gas production rate
CN205778807U (en) A kind of booster station Miniature gas-liquid separating device
CN203891846U (en) Multi-well type jet pump drainage system for coal bed gas
CN203811371U (en) Natural gas line bleeding valve on-line testing device
CN203362074U (en) Improved pressure release manifold device of foam drilling
CN206386102U (en) A kind of gaslift distribution sledge control system for gas-injection station
CN204269183U (en) Water-sealing fire-retardant venting of dust explosion device liquid level gauge
CN201964086U (en) Water-coal-slurry pipeline blocking preventer access device
CN207715143U (en) The system of analog study natural gas pit shaft flowing law
CN204252963U (en) A gas-liquid separation casing gas recovery device

Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
CX01 Expiry of patent term
CX01 Expiry of patent term

Granted publication date: 20131106