CN111076004A - Fire fighting pipeline installation structure and installation method thereof - Google Patents
Fire fighting pipeline installation structure and installation method thereof Download PDFInfo
- Publication number
- CN111076004A CN111076004A CN201911393771.0A CN201911393771A CN111076004A CN 111076004 A CN111076004 A CN 111076004A CN 201911393771 A CN201911393771 A CN 201911393771A CN 111076004 A CN111076004 A CN 111076004A
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- China
- Prior art keywords
- pipeline
- adjacent
- protective cover
- fire fighting
- installation structure
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L21/00—Joints with sleeve or socket
- F16L21/08—Joints with sleeve or socket with additional locking means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/02—Sealings between relatively-stationary surfaces
- F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
- F16J15/064—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces the packing combining the sealing function with other functions
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/02—Energy absorbers; Noise absorbers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L57/00—Protection of pipes or objects of similar shape against external or internal damage or wear
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L58/00—Protection of pipes or pipe fittings against corrosion or incrustation
- F16L58/18—Protection of pipes or pipe fittings against corrosion or incrustation specially adapted for pipe fittings
- F16L58/185—Protection of pipes or pipe fittings against corrosion or incrustation specially adapted for pipe fittings for joints with sleeve or socket
Abstract
The invention relates to a fire-fighting pipeline installation structure and an installation method thereof, wherein the fire-fighting pipeline installation structure comprises a pipeline body and a connecting assembly, the connecting assembly comprises a fixed disc fixed outside the pipeline body and a butt joint piece arranged between the two pipeline bodies, the butt joint piece comprises a clamping part clamped between the two adjacent pipeline bodies and a connecting part protruding out of the pipeline bodies, the connecting part and the clamping part form a step for the pipeline body to be inserted, a sealing ring is fixedly connected to the surface of the step, and the fixed disc and the connecting part are fixed through bolts. The protective cover is sleeved outside the connecting assembly, and the sealing ring is fixed at the step during installation; then, the end part of the pipeline body is inserted into the step and locked by a bolt; then accomplish the joint with the joint groove with first protection casing and second protection casing on the pipeline body, its both ends face butt of both sides after first protection casing and second protection casing accomplish the joint, and first protection casing and the fan-shaped panel portion of second protection casing are range upon range of simultaneously. The invention has better sealing effect of adjacent pipelines.
Description
Technical Field
The invention relates to the technical field of fire fighting, in particular to a fire fighting pipeline installation structure and an installation method thereof.
Background
Fire fighting equipment for fire fighting must be installed in buildings according to fire fighting requirements. The fire fighting equipment comprises a fire fighting pipeline for supplying water, and the fire fighting pipeline comprises a pipeline for connecting an indoor fire hydrant and a pipeline for connecting an indoor spraying device.
The prior fire fighting pipeline mounting structure can refer to a patent with the application number of 201210483687.X, and after sealing rings are arranged outside two adjacent sections of pipelines, the two adjacent sections of pipelines are fixed through a hoop.
The above prior art solutions have the following drawbacks: when the water leakage prevention device is used, the pipeline is vibrated due to the impact of water flow, the sealing effect of the joint of two adjacent sections of pipelines is poor, and water leakage is easily caused.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a fire fighting pipeline installation structure with good adjacent pipeline sealing effect.
The above object of the present invention is achieved by the following technical solutions: the utility model provides a fire control pipeline mounting structure, including the pipeline body and connect the coupling assembling of two adjacent pipeline bodies, coupling assembling is including being fixed in this external fixed disk of pipeline and setting up the interfacing part between two adjacent pipeline bodies, the interfacing part includes the clamping part of centre gripping between two adjacent pipeline bodies and protrusion in the connecting portion of pipeline body, connecting portion towards pipeline body tip direction protrusion and form the step that supplies the pipeline body to peg graft with the clamping part, step surface rigid coupling has the sealing washer, the fixed disk passes through the bolt fastening with connecting portion.
Through adopting above-mentioned technical scheme, the installation is accomplished the back and is carried out fully sealed to the pipe connection department through sealing washer and step, and when the pipeline produced the vibration, the sealing washer can play certain cushioning effect simultaneously, and simultaneously, the gap seal of pipe connection department is still stable, reaches good sealed effect.
The invention is further configured to: and auxiliary sealing rings are arranged between two adjacent sealing rings on the same butt joint part, two sides of each auxiliary sealing ring are respectively and integrally formed with the corresponding sealing ring, and the auxiliary sealing rings are attached to the inner sides of the clamping parts.
Through adopting above-mentioned technical scheme, supplementary sealing washer can shelter from the gap between sealing washer and the step surface, better plays sealed effect.
The invention is further configured to: the other side of the auxiliary sealing ring opposite to the attaching side of the clamping part is flush with the inner side of the pipeline body.
Through adopting above-mentioned technical scheme, guarantee the comparatively stability of step and pipeline body butt joint on the one hand, on the other hand avoids supplementary sealing washer protrusion to the pipeline in and influence the rivers flow.
The invention is further configured to: the connecting part is provided with a threaded hole in threaded connection with the bolt, and the threaded hole is located at the end part of the connecting part.
Through adopting above-mentioned technical scheme, when the pipeline vibration this moment, the tangential force was received to the bolt, reduction vibration that can be better, the bolt is also difficult not hard up.
The invention is further configured to: the connecting component is sleeved with a protective cover.
Through adopting above-mentioned technical scheme, can be so that the junction is difficult to the ash falling or suffer accidental damage.
The invention is further configured to: the protection casing includes first protection casing and the second protection casing the same with first protection casing structure, the outside rigid coupling of connecting portion has a plurality of joint pieces, first protection casing includes annular safety cover body and is located the end panel at annular safety cover body both ends, the end panel of one end is close to pipeline body department joint and has the sealing ring, the end panel of the other end is a plurality of fan-shaped panels and along annular safety cover body the central axis array distribution, be formed with the clearance that supplies the joint piece to pass through between the adjacent fan-shaped panel, set up the draw-in groove that supplies fan-shaped panel card to go into on the joint piece, first protection casing and second protection casing all lean on with the joint piece and connect its both adjacent both ends face butt in back.
Through adopting above-mentioned technical scheme, play certain sealed effect to the junction, in the outer steam of less protection casing got into the protection casing, in the comparatively moist environment of some environment very much for the junction is difficult to take place the corrosion, guarantees to connect and sealed stability.
The invention is further configured to: the outer side of the sector panel is fixedly connected with a sealing gasket.
Through adopting above-mentioned technical scheme for the protective cover has better sealed effect.
The invention is further configured to: a drying agent is arranged in the protective cover.
Through adopting above-mentioned technical scheme, use the drier to absorb the inside steam of protection casing itself, further guarantee that the junction is difficult to the corrosion.
The invention is further configured to: the outside rigid coupling of connecting portion has the box of placing that supplies the drier to place, places the box and corresponds the setting each other with the joint piece.
Through adopting above-mentioned technical scheme, conveniently set up the drier, the joint that the setting of placing the box simultaneously can not influence first protection casing and second protection casing.
A mounting method of a fire fighting pipeline mounting structure comprises the steps of fixing a sealing ring at a step of an abutting part; then, the end parts of two adjacent pipeline bodies are inserted into the step and clamp the clamping part, and the fixed disc and the connecting part are locked through bolts; then will overlap respectively in advance and establish first protection casing and second protection casing on adjacent two pipeline bodies and accomplish the joint with joint groove on the connecting portion, and its adjacent both ends face butt in both of first protection casing and second protection casing completion joint back, and the adjacent sector panel part of first protection casing and second protection casing is range upon range of simultaneously.
Through adopting above-mentioned technical scheme, simple to operate and the inside sealed effect of comparatively abundant assurance protection casing block the entering of steam, and this body coupling stability of adjacent pipeline is higher simultaneously, and sealing performance is better.
In conclusion, the beneficial technical effects of the invention are as follows:
1. through the setting of butt joint spare for the more stability of pipeline body butt joint, it is better to inform sealed effect.
2. When the protective cover is arranged to protect the joint of the pipeline body, a certain sealing effect is formed, so that the joint is not easy to corrode, and the connection and sealing stability is ensured.
Drawings
Fig. 1 is a schematic view of the overall structure of a fire fighting pipeline installation structure.
FIG. 2 is a sectional view of a fire fighting pipeline installation structure connection.
Fig. 3 is a partial schematic view of fig. 2.
Fig. 4 is an internal structure of the fire fighting pipeline installation structure.
Fig. 5 is a front view of the connecting portion.
In the figure, 1, a pipeline body, 11, a fixed disc, 2, a protective cover, 21, a first protective cover, 211, an end panel, 2111, a sealing ring, 212, a fan-shaped panel, 22, a second protective cover, 3, a butt joint piece, 31, a connecting part, 311, a threaded hole, 32, a clamping part, 33, an auxiliary sealing ring, 34, a clamping block, 341, a sealing rubber strip, 342, a clamping groove, 35, a sealing ring, 4, a bolt and 5, and a placing box.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1 and 2, the fire fighting pipeline installation structure disclosed by the invention comprises pipeline bodies 1 and a connecting assembly, wherein two adjacent pipeline bodies 1 are connected through the connecting assembly. The connecting assembly comprises a fixed disc 11 and the butting piece 3, the fixed disc 11 is in a circular ring shape, the fixed disc 11 is sleeved outside the pipeline body 1 and is fixed with the pipeline body 1, and the butting piece 3 is clamped between the two adjacent pipeline bodies 1 by positioning discs on the two adjacent pipeline bodies 1; the butt joint piece 3 comprises a clamping portion 32 and a connecting portion 31 integrally formed with the clamping portion 32, the clamping portion 32 is clamped between two adjacent pipeline bodies 1, the connecting portion 31 is located outside the pipeline bodies 1, the connecting portion 31 is integrally annular, the connecting portion 31 protrudes towards the end portion of the pipeline body 1 and forms a step for the insertion of the pipeline body 1 with the clamping portion 32, a sealing ring 35 is fixedly connected to the surface of the step, and the end portion of the pipeline body 1 abuts against the sealing ring 35 when inserted into the step. A threaded hole 311 is formed in the end of the connecting portion 31, a through hole is formed in the fixed disk 11, and one end of the bolt 4 passes through the through hole to be in threaded connection with the threaded hole 311, so that the fixed disk 11 is locked to the connecting portion 31.
With reference to fig. 2 and 3, an auxiliary sealing ring 33 is disposed between two adjacent sealing rings 35 on the same butt joint member 3, the auxiliary sealing ring 33 is integrally formed with the sealing ring 35, the auxiliary sealing ring 33 is attached to the inner side of the clamping portion 32, and the sealing rings 35 on two sides of the clamping portion 32 are connected through the auxiliary sealing ring 33, so that a gap between the sealing ring 35 and the clamping portion 32 is fully sealed, and a better sealing effect is achieved. The other side of the auxiliary seal ring 33, which is opposite to the clamping portion 32 in the first attaching process, does not protrude from the inner side of the pipeline body 1, and is preferably flush with the inner side of the pipeline, so that the passing of water flow in the pipeline is not easily influenced. Of course, as another mode, the sealing ring 35 extends to a position between the fixed disk 11 and the connecting portion 31 near one end of the fixed disk 11 to form an annular sealing gasket, so as to achieve a better sealing effect and also achieve a certain gasket effect, so that the connecting portion 31 and the fixed disk 11 are locked more sufficiently.
Referring to fig. 3 and 4, the connecting assembly is externally sleeved with a protective cover 2, the protective cover 2 comprises a first protective cover 21 and a second protective cover 22, and the first protective cover 21 and the second protective cover 22 have the same structure and are respectively sleeved on two adjacent pipeline bodies 1. Describing by using the first protection cover 21, the first protection cover 21 includes a body of the annular protection cover 2 and end plates 211 located at two ends of the body of the annular protection cover 2, the end plates 211 are welded and fixed to the body of the annular protection cover 2, a sealing ring 2111 is clamped at a position, close to the body, of the end plate 211 at one end of the first protection cover 21, and one side, opposite to the clamping side of the end plate 211, of the sealing ring 2111 abuts against the surface of the pipeline body 1; the end plate 211 at the other end of the first protective cover 21 is a plurality of sector plates 212, and the sector plates 212 are distributed in an array along the central axis of the main body of the ring-shaped protective cover 2. A plurality of clamping blocks 34 are fixedly connected to the outer side of the connecting portion 31, the clamping blocks 34 are distributed along the circumference of the connecting portion 31, the number of the clamping blocks 34 is the same as that of the fan-shaped panels 212, the clamping blocks 34 are arranged at intervals, gaps for the fan-shaped panels 212 to pass through are reserved between the adjacent clamping blocks 34, and gaps for the clamping blocks 34 to pass through are formed between the adjacent fan-shaped panels 212. The clamping groove is formed in the clamping block 34, after the sector-shaped panel 212 of the first protection cover 21 moves to the side of the clamping groove, the first protection cover 21 is rotated around the pipeline body 1, a part of the sector-shaped panel 212 of the first protection cover 21 is clamped into the clamping groove, then the second protection cover 22 is clamped into the clamping groove of the adjacent clamping block 34 through the same operation, and at the moment, the sector-shaped panel 212 of the first protection cover 21 and the sector-shaped panel 212 of the second protection cover 22 are partially overlapped and abutted. Referring to fig. 5, in order to facilitate the first protective cover 21 and the second protective cover 22 to be clamped into the clamping grooves and to facilitate the abutting, the adjacent clamping grooves 342 are distributed in a staggered manner in the axial direction of the connecting portion 31, that is, two adjacent clamping grooves 342 are located on two sides of the dotted line in the figure.
Referring back to fig. 3 and 4, a placing box 5 is fixedly connected to the outer side of the connecting portion 31, the placing box 5 and the clamping block 34 are arranged correspondingly to each other, that is, the straight line where the placing box 5 and the clamping block 34 are located is parallel to the axis of the connecting portion 31, and a drying agent is placed in the placing box 5. In order to stably clamp the sector-shaped panel 212 with the clamping groove 342, a sealing rubber strip 341 can be fixedly connected to the inner wall of the clamping groove 342. Of course, as another mode, in order to ensure that the sector panels 212 are stably engaged with the engaging grooves 342 and that the sector panels 212 on the first protection cover 21 and the sector panels 212 on the second protection cover 22 are sufficiently sealed, a sealing gasket (not shown) may be fixed to the surface of the sector panels 212, and the sealing gasket is the same size as the sector panels 212.
A method for installing a fire-fighting pipeline installation structure comprises the steps of sleeving a first protective cover 21 and a second protective cover 22 on a pipeline body 1 in advance, and fixing a sealing ring 35 at a step of an abutting part 3; then, the end parts of two adjacent pipeline bodies 1 are inserted into the step to be preliminarily fixed and clamp the clamping part 32, and the fixed disc 11 and the connecting part 31 are locked through the bolt 4 so that the pipeline bodies 1 and the butt-joint part 3 are fully fixed; then, the first protective cover 21 and the second protective cover 22 which are respectively sleeved on the two adjacent pipeline bodies 1 in advance are clamped with the clamping groove 342 on the connecting portion 31, after the first protective cover 21 and the second protective cover 22 are clamped, the two adjacent end faces of the first protective cover 21 and the second protective cover 22 are abutted, and meanwhile, the adjacent sector-shaped panels 212 of the first protective cover 21 and the second protective cover 22 are partially stacked.
The implementation principle of the embodiment is as follows: after the installation is finished, the joint of the pipeline body 1 is fully sealed through the sealing ring 35 and the step, so that a good sealing effect is achieved, meanwhile, when the pipeline body 1 vibrates, the sealing ring 35 can play a certain role in damping and buffering, so that the gap sealing at the joint of the pipeline body 1 is still stable, and a good sealing effect is achieved; and through the setting of safety cover 2, the junction of interfacing part 3 and pipeline body 1 is difficult to the corrosion or suffers unexpected the calculation and trades, guarantees the stability of connection processing connection, and safety cover 2 makes things convenient for the dismouting simultaneously, accomplishes the maintenance to the junction and changes to the drier.
The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.
Claims (10)
1. The utility model provides a fire control pipeline mounting structure, includes pipeline body (1) and connects the coupling assembling of two adjacent pipeline bodies (1), its characterized in that: coupling assembling is including being fixed in outside fixed disk (11) of pipeline body (1) and setting up butt joint spare (3) between two adjacent pipeline bodies (1), butt joint spare (3) are including centre gripping in clamping part (32) between two adjacent pipeline bodies (1) and protrusion in connecting portion (31) of pipeline body (1), connecting portion (31) are towards pipeline body (1) tip direction protrusion and form the step that supplies pipeline body (1) to peg graft with clamping part (32), step surface rigid coupling has sealing washer (35), fixed disk (11) are fixed through bolt (4) with connecting portion (31).
2. A fire fighting pipeline installation structure as set forth in claim 1, wherein: an auxiliary sealing ring (33) is arranged between two adjacent sealing rings (35) on the same butt joint piece (3), two sides of the auxiliary sealing ring (33) are respectively and integrally formed with the sealing rings (35), and the auxiliary sealing ring (33) is attached to the inner side of the clamping part (32).
3. A fire fighting pipeline installation structure as set forth in claim 2, wherein: the other side of the auxiliary sealing ring (33) opposite to the attaching side of the clamping part (32) is flush with the inner side of the pipeline body (1).
4. A fire fighting pipeline installation structure as set forth in claim 1, wherein: the connecting part (31) is provided with a threaded hole (311) in threaded connection with the bolt (4), and the threaded hole (311) is positioned at the end part of the connecting part (31).
5. A fire fighting pipeline installation structure as set forth in claim 1, wherein: the connecting component is sleeved with a protective cover (2).
6. A fire fighting pipeline installation structure as set forth in claim 5, wherein: protection cover (2) include first protection cover (21) and second protection cover (22) the same with first protection cover (21) structure, the outside rigid coupling of connecting portion (31) has a plurality of joint pieces (34), first protection cover (21) include annular protection cover (2) body and be located end panel (211) at annular protection cover (2) body both ends, the end panel (211) of one end are close to pipeline body (1) department joint and have sealing ring (2111), the end panel (211) of the other end are a plurality of fan-shaped panel (212) and along annular protection cover (2) body central axis array distribution, be formed with the clearance that supplies joint piece (34) to pass through between adjacent fan-shaped panel (212), set up the draw-in groove that supplies fan-shaped panel (212) card to go into on joint piece (34), first protection cover (21) and second protection cover (22) all lean on with joint piece (34) and connect its both ends adjacent face butt.
7. A fire fighting pipeline installation structure as set forth in claim 6, wherein: the outer side of the sector panel (212) is fixedly connected with a sealing gasket.
8. A fire fighting pipeline installation structure as set forth in claim 6, wherein: a drying agent is arranged in the protective cover (2).
9. A fire fighting pipeline installation structure as set forth in claim 8, wherein: the outside rigid coupling of connecting portion (31) has the box (5) of placing that supply the drier to place, places box (5) and joint piece (34) and corresponds the setting each other.
10. A method of installing a fire fighting pipeline installation structure as set forth in claim 5, characterized in that: firstly, fixing a sealing ring (35) at a step of an abutting piece (3); then, the end parts of two adjacent pipeline bodies (1) are inserted into the step and clamped with the clamping part (32), and the fixed disc (11) and the connecting part (31) are locked through the bolts (4); then, the first protective cover (21) and the second protective cover (22) which are respectively sleeved on the two adjacent pipeline bodies (1) in advance are clamped with the clamping groove (342) in the connecting portion (31), the two adjacent end faces of the first protective cover (21) and the second protective cover (22) are abutted after the first protective cover (21) and the second protective cover (22) are clamped, and meanwhile the fan-shaped panels (212) adjacent to the first protective cover (21) and the second protective cover (22) are partially stacked.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911393771.0A CN111076004B (en) | 2019-12-30 | 2019-12-30 | Fire fighting pipeline installation structure and installation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911393771.0A CN111076004B (en) | 2019-12-30 | 2019-12-30 | Fire fighting pipeline installation structure and installation method thereof |
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| Publication Number | Publication Date |
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| CN111076004A true CN111076004A (en) | 2020-04-28 |
| CN111076004B CN111076004B (en) | 2021-06-04 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111895216A (en) * | 2020-08-04 | 2020-11-06 | 翟应春 | Petroleum transportation pipeline structure |
| CN111997090A (en) * | 2020-09-10 | 2020-11-27 | 嘉兴博睿创业服务有限公司 | Waterproof structure of building underground pipe gallery |
| CN112856081A (en) * | 2020-12-31 | 2021-05-28 | 辽宁希泰科技有限公司 | Double-layer corrugated pipe butt joint |
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| CN108963900A (en) * | 2018-07-19 | 2018-12-07 | 芜湖籁余新能源科技有限公司 | A kind of apparatus for protecting deck cable |
| CN212617060U (en) * | 2020-05-28 | 2021-02-26 | 周海波 | Natural gas pipeline storage device |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111895216A (en) * | 2020-08-04 | 2020-11-06 | 翟应春 | Petroleum transportation pipeline structure |
| CN111895216B (en) * | 2020-08-04 | 2022-02-11 | 李彦泽 | Petroleum transportation pipeline structure |
| CN111997090A (en) * | 2020-09-10 | 2020-11-27 | 嘉兴博睿创业服务有限公司 | Waterproof structure of building underground pipe gallery |
| CN112856081A (en) * | 2020-12-31 | 2021-05-28 | 辽宁希泰科技有限公司 | Double-layer corrugated pipe butt joint |
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Address after: 601, 6th floor, building 11, District 12, 188 South 4th Ring Road West, Fengtai District, Beijing Patentee after: Beijing Longchenquan Construction Engineering Co.,Ltd. Address before: 601, 6th floor, building 11, District 12, 188 South 4th Ring Road West, Fengtai District, Beijing Patentee before: BEIJING LONGCHENQUAN FIRE FIGHTING EQUIPMENT INSTALLATION ENGINEERING Co.,Ltd. |