CN112483765B - Filtering pipeline for natural gas transportation and filtering method thereof - Google Patents

Filtering pipeline for natural gas transportation and filtering method thereof Download PDF

Info

Publication number
CN112483765B
CN112483765B CN202011569521.0A CN202011569521A CN112483765B CN 112483765 B CN112483765 B CN 112483765B CN 202011569521 A CN202011569521 A CN 202011569521A CN 112483765 B CN112483765 B CN 112483765B
Authority
CN
China
Prior art keywords
natural gas
filter screen
pipeline
filtering
shell
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.)
Active
Application number
CN202011569521.0A
Other languages
Chinese (zh)
Other versions
CN112483765A (en
Inventor
董国亮
郭涛源
孙忠洋
陈松
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 Natural Gas Guangyuan Co ltd
Original Assignee
China Natural Gas Guangyuan 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 Natural Gas Guangyuan Co ltd filed Critical China Natural Gas Guangyuan Co ltd
Priority to CN202011569521.0A priority Critical patent/CN112483765B/en
Publication of CN112483765A publication Critical patent/CN112483765A/en
Application granted granted Critical
Publication of CN112483765B publication Critical patent/CN112483765B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16LPIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L55/00Devices or appurtenances for use in, or in connection with, pipes or pipe systems
    • F16L55/24Preventing accumulation of dirt or other matter in the pipes, e.g. by traps, by strainers
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16LPIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L21/00Joints with sleeve or socket
    • F16L21/08Joints with sleeve or socket with additional locking means

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)

Abstract

The invention provides a filtering pipeline for natural gas transportation, which comprises a fixing mechanism and a filtering mechanism, wherein the fixing mechanism comprises an upper shell, two connecting sleeves, a lower shell and a first screw rod, and the lower surface of the upper shell is in threaded connection with the upper surface of the lower shell through a bolt; the sand, oil residue and ferrous sulfide in the natural gas pipeline can be filtered in a targeted manner by utilizing the first filter screen, the second filter screen and the third filter screen of the two groups of supporting shells through different meshes, and a filter channel formed by six cavities can effectively filter solid particles in the natural gas pipeline; the natural gas pipeline butt joint device has the advantages that the natural gas pipelines of different sizes can be adjusted and butted through the caliper plates and other related mechanisms of the connecting sleeve, cement or sealant can be injected through the liquid injection port according to the requirements of actual conditions, and the pipelines and the natural gas pipeline butt joint device are permanently sealed, so that the requirements of wide applicability are met.

Description

Filtering pipeline for natural gas transportation and filtering method thereof
Technical Field
The invention relates to the technical field of natural gas pipelines, in particular to a filtering pipeline for natural gas transportation and a filtering method thereof.
Background
Natural gas, which is a mixture of hydrocarbons and non-hydrocarbon gases naturally accumulated in a formation, generally refers to oil field gas and gas field gas in petroleum geology, mainly consists of hydrocarbons, contains non-hydrocarbon gases, is a high-quality fuel and chemical raw material, is widely applied to industrial production and inside urban and rural buildings at present, and is provided with corresponding transportation pipelines;
however, the production of natural gas is accompanied by solid particulate impurities such as silt, oil residue and ferrous sulfide, which are easily damaged in the inner cavities of domestic or industrial natural gas devices if mixed with the natural gas.
Therefore, in view of the above situation, a filtering pipeline for natural gas transportation and a filtering method thereof are provided.
Disclosure of Invention
In view of the above, embodiments of the present invention are intended to provide a filtering pipeline for natural gas transportation and a filtering method thereof, so as to solve or alleviate the technical problems in the prior art, and to provide at least one useful choice.
The technical scheme of the embodiment of the invention is realized as follows: a filtering pipeline for natural gas transportation comprises a fixing mechanism and a filtering mechanism, wherein the fixing mechanism comprises an upper shell, two connecting sleeves, a lower shell and a first screw rod, the lower surface of the upper shell is in threaded connection with the upper surface of the lower shell through bolts, two side surfaces of the lower shell are respectively welded with the two connecting sleeves, a connecting frame is welded at the top of the inner side wall of the lower shell, a threaded sleeve is welded on the upper surface of the connecting frame, the inner side wall of the threaded sleeve is in threaded connection with the outer surface of the first screw rod, the outer surface of the first screw rod is rotatably connected with the inner side wall of the upper shell through a bearing, and flanges are symmetrically and uniformly welded at the front part and the rear part of the inner side wall of the lower shell;
the filtering mechanism comprises two supporting shells, a first filtering net, a second filtering net and a third filtering net,
the utility model discloses a support casing, including support casing, first filter screen, second filter screen, third filter screen, adapter sleeve, clamping plate, the concave groove has evenly been seted up with the back surface symmetry to the front surface of support casing, the inside wall of concave groove with the surface looks adaptation of flange, three slot has been seted up to the inside wall of support casing, the support casing pass through the slot respectively with first filter screen the second filter screen with the third filter screen is pegged graft, adapter sleeve's inside wall threaded connection has six second screw rods, the lateral wall welding of second screw rod has the clamping plate, the liquid mouth has evenly been seted up to adapter sleeve's surface.
In some embodiments, a capstan is welded to the top of the first screw.
In some embodiments, the outer surface of the connecting sleeve is uniformly welded with reinforcing ribs, and the outer surface of the reinforcing ribs is welded with the outer side wall of the lower shell.
In some embodiments, a groove is formed in the upper surface of the lower shell, a sealing strip is bonded to the inner side wall of the groove, and the outer surface of the sealing strip is matched with the lower surface of the upper shell.
In some embodiments, a support plate is welded to the lower surface of the connection frame, and the lower surface of the support plate is welded to the bottom of the inner side wall of the lower shell.
In some embodiments, the front surface and the rear surface of the support shell are symmetrically and uniformly adhered with rubber pads.
The invention also provides a filtering method of the filtering pipeline for natural gas transportation, which comprises the following steps:
s1, firstly, inserting a natural gas pipeline into a connecting sleeve, inserting another natural gas pipeline to be connected into another connecting sleeve, and respectively carrying out inward rotation adjustment on second screws of the two connecting sleeves by a worker to drive a clamping plate to press and fix the natural gas pipeline and inject plugging materials such as cement into the connecting sleeves;
s2, when the filtering work is normally carried out, the first filter screen, the second filter screen and the third filter screen of the two groups of supporting shells can carry out targeted filtering on silt, oil residue and ferrous sulfide in the natural gas pipeline through different mesh numbers, and a filter channel formed by six cavities can effectively filter solid particles in the natural gas pipeline;
s3, when the first filter screen, the second filter screen and the third filter screen are replaced and installed, the first screw rod is rotated in the threaded sleeve through the winch, the upper shell after the bolt is unloaded is opened, the supporting shell is taken out through the matching between the flange and the concave groove, and the first filter screen, the second filter screen and the third filter screen are replaced through the corresponding three groups of slots.
In some embodiments, in S1, a worker injects a plugging material such as cement into the connecting sleeve through the injection port.
Due to the adoption of the technical scheme, the embodiment of the invention has the following advantages:
1. the sand, oil residue and ferrous sulfide in the natural gas pipeline can be filtered in a targeted manner by utilizing the first filter screen, the second filter screen and the third filter screen of the two groups of supporting shells through different meshes, and a filter channel formed by six cavities can effectively filter solid particles in the natural gas pipeline;
2. through the mutual matching of the structures such as the flange and the concave groove in the filtering mechanism, the requirements for quick replacement and installation of the filter screen can be met;
3. the clamp plates and other related mechanisms of the connecting sleeve can realize the adjustment butt joint of natural gas pipelines with different sizes, and can also utilize the liquid injection port to inject cement or sealant according to the requirements under actual conditions to permanently seal the pipelines and the invention so as to realize the requirements of wide applicability;
the foregoing summary is provided for the purpose of description only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features of the present invention will be readily apparent by reference to the drawings and the following detailed description.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the embodiments or technical descriptions will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic perspective view of the present invention;
FIG. 2 is a schematic cross-sectional perspective view of the fixing mechanism of the present invention;
FIG. 3 is a perspective view of the lower housing of the present invention;
FIG. 4 is a schematic perspective view of the filter mechanism of the present invention;
FIG. 5 is a perspective view of the support housing of the present invention;
FIG. 6 is a schematic perspective view of a first filter according to the present invention;
fig. 7 is a schematic perspective view of the connecting sleeve of the present invention.
Reference numerals: 1. a fixing mechanism; 101. an upper housing; 1011. reinforcing ribs; 102. a connecting sleeve; 1021. a liquid injection port; 103. a lower housing; 1031. a connecting frame; 1032. a threaded sleeve; 1033. a support plate; 1034. a groove; 104. a capstan; 105. a first screw; 106. a seal strip; 107. a flange; 2. a filtering mechanism; 201. a support housing; 2011. a slot; 202. a recess groove; 203. a rubber pad; 204. a first filter screen; 205. a second filter screen; 206. a third filter screen; 3. a second screw; 4. a clamping plate.
Detailed Description
In the following, only certain exemplary embodiments are briefly described. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. Accordingly, the drawings and description are to be regarded as illustrative in nature, and not as restrictive.
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
As shown in fig. 1 to 7, an embodiment of the present invention provides a filter pipeline for natural gas transportation, including a fixing mechanism 1 and a filter mechanism 2, where the fixing mechanism 1 includes an upper housing 101, two connection sleeves 102, a lower housing 103 and a first screw 105, a lower surface of the upper housing 101 is in threaded connection with an upper surface of the lower housing 103 through bolts, two side surfaces of the lower housing 103 are respectively welded with the two connection sleeves 102, a connection frame 1031 is welded on a top portion of an inner side wall of the lower housing 103, a threaded sleeve 1032 is welded on an upper surface of the connection frame 1031, an inner side wall of the threaded sleeve 1032 is in threaded connection with an outer surface of the first screw 105, an outer surface of the first screw 105 is rotatably connected with an inner side wall of the upper housing 101 through a bearing, and flanges 107 are symmetrically and uniformly welded on a front portion and a rear portion of the inner side wall of the lower housing 103;
filter mechanism 2 includes two support casings 201, first filter screen 204, second filter screen 205 and third filter screen 206, concave groove 202 has evenly been seted up with the back surface symmetry to the front surface of support casing 201, the inside wall of concave groove 202 and the surface looks adaptation of flange 107, three slot 2011 has been seted up to the inside wall of support casing 201, support casing 201 pass through slot 2011 respectively with first filter screen 204, second filter screen 205 and third filter screen 206 peg graft, the inside wall threaded connection of connecting sleeve 102 has six second screw rods 3, the outside wall welding of second screw rod 3 has caliper plate 4, the surface of connecting sleeve 102 has evenly been seted up and has been annotated liquid mouth 1021
In one embodiment, the top of the first screw 105 is welded with a capstan 104; the winch 104 may assist the worker in quickly rotating the first screw 105 within the threaded sleeve 1032 to open the upper housing 101 after unloading the bolts.
In one embodiment, the outer surface of the connecting sleeve 102 is uniformly welded with reinforcing ribs 1011, and the outer surface of the reinforcing ribs 1011 is welded with the outer side wall of the lower shell 103; the reinforcing ribs 1011 can increase the metal fatigue resistance and the bearing capacity of the connecting sleeve 102, avoid the crushing phenomenon of the metal outer skin of the connecting sleeve, and prolong the service life of the whole equipment.
In one embodiment, a groove 1034 is formed on the upper surface of the lower housing 103, a sealing strip 106 is bonded on the inner sidewall of the groove 1034, and the outer surface of the sealing strip 106 is matched with the lower surface of the upper housing 101; the sealing strip 106 can completely seal the gap between the lower shell 103 and the upper shell 101, so as to avoid the leakage of natural gas.
In one embodiment, the support plate 1033 is welded to the lower surface of the connecting frame 1031, and the lower surface of the support plate 1033 is welded to the bottom of the inner sidewall of the lower housing 103; the support plate 1033 can provide an auxiliary support for the connecting frame 1031, and can also separate the two filtering mechanisms 2 to avoid the natural gas blockage caused by the mutual interference between the two filtering mechanisms.
In one embodiment, the front surface and the rear surface of the support housing 201 are symmetrically and uniformly adhered with rubber pads 203; the rubber pad 203 may help the support case 201 to increase friction against the inner sidewall of the lower case 103 to improve its fixing stability.
In one embodiment, the specific mesh number of the first filter 204 is 120-150 mesh, the specific mesh number of the second filter 205 is 160-180 mesh, and the specific mesh number of the third filter 206 is 190-220 mesh; the specific materials of the first filter 204, the second filter 205 and the third filter 206 are all zinc-plated alloys.
The invention also provides a filtering method of the filtering pipeline for natural gas transportation, which comprises the following steps:
s1, firstly, inserting a natural gas pipeline into a connecting sleeve 102, inserting another natural gas pipeline to be connected into another connecting sleeve 102, and respectively carrying out inward rotation adjustment on second screws 3 of the two connecting sleeves 102 by a worker to drive a caliper plate 4 to press and fix the natural gas pipeline and inject plugging materials such as cement into the connecting sleeve 102;
s2, when the filtering work is normally carried out, the first filter screen 204, the second filter screen 205 and the third filter screen 206 of the two groups of supporting shells 201 can carry out targeted filtering on silt, oil residue and ferrous sulfide in the natural gas pipeline through different mesh numbers, and a filter channel formed by six cavities can effectively filter solid particles in the natural gas pipeline;
s3, when the first filter screen 204, the second filter screen 205 and the third filter screen 206 are replaced and installed, the first screw 105 is rotated in the threaded sleeve 1032 through the hinge plate 104, the upper shell 101 after the bolts are unloaded is opened, the support shell 201 is taken out through the matching between the flange 107 and the concave groove 202, and the first filter screen 204, the second filter screen 205 and the third filter screen 206 are replaced through the corresponding three groups of slots 2011.
In one embodiment, in S1, the operator may inject plugging material such as cement into the connection sleeve 102 through the injection port 1021.
The invention is in operation: the sand, the oil residue and the ferrous sulfide in the natural gas pipeline are filtered in a targeted manner by using the first filter screen 204, the second filter screen 205 and the third filter screen 206 of the two groups of filter mechanisms 2 through different meshes, and a filter channel consisting of six cavities is formed, so that solid particles in the natural gas pipeline can be effectively filtered; moreover, the first filter screen 204, the second filter screen 205 and the third filter screen 206 can be quickly replaced and installed by the mutual matching between the flange 107 and the concave groove 202 in the filter mechanism 2 and the action of the slot 2011; the connecting sleeve 102 can adjust the second screw 3 to perform feeding movement, and is matched with the clamping plate 4 to realize the adjustment clamping connection of natural gas pipelines with different sizes, and cement or sealant can be injected through the liquid injection port 1021 according to the requirements of actual conditions to permanently seal the pipelines and the invention, so that the requirement of wide applicability is met.
The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive various changes or substitutions within the technical scope of the present invention, and these should be covered by the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims (7)

1. A filter pipeline for natural gas transportation, includes fixed establishment (1) and filtering mechanism (2), its characterized in that: the fixing mechanism (1) comprises an upper shell (101), two connecting sleeves (102), a lower shell (103) and a first screw (105), wherein the lower surface of the upper shell (101) is in threaded connection with the upper surface of the lower shell (103) through bolts, two side surfaces of the lower shell (103) are respectively welded with the two connecting sleeves (102), a connecting frame (1031) is welded at the top of the inner side wall of the lower shell (103), a threaded sleeve (1032) is welded on the upper surface of the connecting frame (1031), the inner side wall of the threaded sleeve (1032) is in threaded connection with the outer surface of the first screw (105), the outer surface of the first screw (105) is rotatably connected with the inner side wall of the upper shell (101) through a bearing, and flanges (107) are symmetrically and uniformly welded at the front part and the rear part of the inner side wall of the lower shell (103);
the filter mechanism (2) comprises two support shells (201), a first filter screen (204), a second filter screen (205) and a third filter screen (206), concave grooves (202) are symmetrically and uniformly formed in the front surfaces and the rear surfaces of the support shells (201), the inner side walls of the concave grooves (202) are matched with the outer surfaces of the flanges (107), three inserting grooves (2011) are formed in the inner side walls of the support shells (201), the support shells (201) are respectively connected with the first filter screen (204), the second filter screen (205) and the third filter screen (206) in an inserting mode through the inserting grooves (2011), six second screw rods (3) are connected to the inner side walls of the connecting sleeves (102) in a threaded mode, clamping plates (4) are welded to the outer side walls of the second screw rods (3), and liquid injection ports (1021) are uniformly formed in the outer surfaces of the connecting sleeves (102);
wherein, the lower surface welding of link (1031) has backup pad (1033), the lower surface of backup pad (1033) with the inside wall bottom welding of lower casing (103).
2. The filtered pipeline for natural gas transport of claim 1, wherein: a winch (104) is welded on the top of the first screw (105).
3. The filtered pipeline for natural gas transport of claim 1, wherein: reinforcing ribs (1011) are uniformly welded on the outer surface of the connecting sleeve (102), and the outer surface of each reinforcing rib (1011) is welded with the outer side wall of the lower shell (103).
4. The filtered pipeline for natural gas transportation of claim 1, wherein: a groove (1034) is formed in the upper surface of the lower shell (103), a sealing strip (106) is bonded to the inner side wall of the groove (1034), and the outer surface of the sealing strip (106) is matched with the lower surface of the upper shell (101).
5. The filtered pipeline for natural gas transportation of claim 1, wherein: rubber pads (203) are symmetrically and uniformly adhered to the front surface and the rear surface of the supporting shell (201).
6. A method of filtering a filtering pipeline for natural gas transportation, which employs the filtering pipeline for natural gas transportation according to any one of claims 1 to 5, comprising the steps of:
s1, firstly, inserting a natural gas pipeline into a connecting sleeve (102), inserting another natural gas pipeline to be connected into the other connecting sleeve (102), respectively adjusting the respective second screw rods (3) of the two connecting sleeves (102) in an inward rotating manner by a worker, driving a clamping plate (4) to press and fix the natural gas pipeline, and injecting a plugging material into the connecting sleeve (102);
s2, when the filtering work is normally carried out, the first filter screen (204), the second filter screen (205) and the third filter screen (206) of the two groups of supporting shells (201) can carry out targeted filtering on silt, oil slag and ferrous sulfide in the natural gas pipeline through different mesh numbers, and a filter channel formed by six cavities is used for effectively filtering solid particles in the natural gas pipeline;
s3, when the first filter screen (204), the second filter screen (205) and the third filter screen (206) are replaced and installed, the first screw (105) is rotated in the threaded sleeve (1032) through the winch (104), the upper shell (101) after the bolts are unloaded is opened, the supporting shell (201) is taken out through the matching between the flange (107) and the concave groove (202), and the first filter screen (204), the second filter screen (205) and the third filter screen (206) are replaced through the corresponding three groups of inserting grooves (2011).
7. The method of filtering a filtered pipeline for natural gas transportation according to claim 6, characterized in that: in S1, a worker injects a plugging material into the connecting sleeve (102) through the liquid injection port (1021).
CN202011569521.0A 2020-12-26 2020-12-26 Filtering pipeline for natural gas transportation and filtering method thereof Active CN112483765B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202011569521.0A CN112483765B (en) 2020-12-26 2020-12-26 Filtering pipeline for natural gas transportation and filtering method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202011569521.0A CN112483765B (en) 2020-12-26 2020-12-26 Filtering pipeline for natural gas transportation and filtering method thereof

Publications (2)

Publication Number Publication Date
CN112483765A CN112483765A (en) 2021-03-12
CN112483765B true CN112483765B (en) 2022-12-23

Family

ID=74915739

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202011569521.0A Active CN112483765B (en) 2020-12-26 2020-12-26 Filtering pipeline for natural gas transportation and filtering method thereof

Country Status (1)

Country Link
CN (1) CN112483765B (en)

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4140873B2 (en) * 1999-02-08 2008-08-27 コスモ工機株式会社 Tube fixing device
CN100535501C (en) * 2008-04-11 2009-09-02 常熟市上海飞奥压力容器制造有限公司 Natural gas filter
US8523141B2 (en) * 2008-04-24 2013-09-03 Cameron International Corporation Control valve
CN208651953U (en) * 2018-08-16 2019-03-26 胡元兵 Petroleum pipeline breach plugging device
CN110699137A (en) * 2019-12-03 2020-01-17 华电郑州机械设计研究院有限公司 Filter device for natural gas conveying
CN211902065U (en) * 2019-12-25 2020-11-10 四川吉石科技有限公司 Novel epoxy steel sleeve for pipeline reinforcement
CN211649378U (en) * 2020-02-26 2020-10-09 浙江云佐科技股份有限公司 Hydraulic engineering pipeline connecting device
CN112066107A (en) * 2020-08-28 2020-12-11 夏鹏 Natural gas conveying pipeline

Also Published As

Publication number Publication date
CN112483765A (en) 2021-03-12

Similar Documents

Publication Publication Date Title
CN101625061B (en) Pipelining emergent repairing method of prestressing steel cylinder concrete pipe
CN112483765B (en) Filtering pipeline for natural gas transportation and filtering method thereof
CN111706340B (en) Shield tail brush convenient to replace and method for replacing shield tail brush under long-distance non-reinforced working condition
CN209469886U (en) A kind of waterproof wall bushing
CN205577925U (en) A layer drilling hole sealing device is worn in gas stifled and middle water seal in two for coal mine
CN103662467B (en) Assembled tank
CN205940116U (en) Flexible sealing device for rotary kiln
WO2023284896A1 (en) Tunnel water and mud inrush sealing method
CN216726012U (en) Shield constructs quick-witted bentonite thick liquid filter equipment
CN206752302U (en) The multinomial displacement noise abatement expansion joint of modular
CN205538270U (en) Muddy water pipe pushing jack test device
CN212297912U (en) Reinforcing structure for outlet of pipe jacking receiving well
CN212508320U (en) Shield tail brush device capable of being replaced in shield tunneling process
CN209873861U (en) Sealing device for lap joint of steel corrugated plate pipe gallery plates
CN210266308U (en) Pipeline adds rigid coupling structure
CN211816501U (en) Tunnel excavator bucket
CN207673293U (en) A kind of oil-gas mining casing
CN201815482U (en) Impurity filter for scattered lime
CN201462321U (en) Emergency repair structure of pipeline of prestressed concrete cylinder pipe (PCCP)
CN218466619U (en) Connecting frame for loader
CN213629268U (en) Wear-resistant corrosion-resistant glass fiber reinforced plastic sand inclusion pipe
CN217814289U (en) Oil filter for underground coal mine
CN218757703U (en) Plastic fuel tank assembly and excavator
CN101634157B (en) Grab bucket
CN212663010U (en) Air filter and coal dust protection equipment for forklift

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant