CN111059390A - Rigid-flexible alloy pipe with built-in elastic locking mechanism and connection mode thereof - Google Patents

Rigid-flexible alloy pipe with built-in elastic locking mechanism and connection mode thereof Download PDF

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Publication number
CN111059390A
CN111059390A CN201911099834.1A CN201911099834A CN111059390A CN 111059390 A CN111059390 A CN 111059390A CN 201911099834 A CN201911099834 A CN 201911099834A CN 111059390 A CN111059390 A CN 111059390A
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China
Prior art keywords
alloy pipe
ring
annular
built
rigid
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Pending
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CN201911099834.1A
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Chinese (zh)
Inventor
陈辉
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Jiangsu Jiaheng Pipe Industry Technology Development Co ltd
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Jiangsu Jiaheng Pipe Industry Technology Development Co ltd
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Application filed by Jiangsu Jiaheng Pipe Industry Technology Development Co ltd filed Critical Jiangsu Jiaheng Pipe Industry Technology Development Co ltd
Priority to CN201911099834.1A priority Critical patent/CN111059390A/en
Publication of CN111059390A publication Critical patent/CN111059390A/en
Pending legal-status Critical Current

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    • 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
    • F16L37/00Couplings of the quick-acting type
    • F16L37/08Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members
    • F16L37/084Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members combined with automatic locking
    • F16L37/096Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members combined with automatic locking by means of hooks hinged about an axis

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Quick-Acting Or Multi-Walled Pipe Joints (AREA)

Abstract

The invention relates to the technical field of connecting pipes, in particular to a rigid-flexible alloy pipe with a built-in elastic locking mechanism and a connecting mode thereof. According to the rigid-flexible alloy pipe with the built-in elastic locking mechanism and the connection mode of the rigid-flexible alloy pipe, the internal water guide ring and the assembly limiting ring are arranged at the connection end of the socket connector and the socket connector, the annular assembly groove with the built-in elastic adjusting lever mechanism is formed in the right side surface of the internal water guide ring, the connector is fixed by inserting the triangular limiting block at the top end of the adjusting lever mechanism into the guide limiting blind hole, the annular fixing groove with the built-in annular electromagnet is formed in the outer side surface of the alloy pipe body, the adjusting lever mechanism is controlled to turn over by matching the annular electromagnet with the iron extrusion spring, so that the connection end can be conveniently detached when needed, and the sealing rubber sleeve on the sealing ring and the internal sealing ring with the resistance ring are utilized, and therefore the sealing performance and the.

Description

Rigid-flexible alloy pipe with built-in elastic locking mechanism and connection mode thereof
Technical Field
The invention relates to the technical field of connecting pipes, in particular to a rigid-flexible alloy pipe with a built-in elastic locking mechanism and a connecting mode thereof.
Background
At present, a joint of a large-diameter alloy pipe generally adopts a single rubber sealing ring socket joint connection mode, the pipe is influenced by multiple factors such as water gravity and geological change in the pipe after being connected, the joint is easy to leak and loosen, a water closing tightness test required by national standards cannot be passed, and the application of the large-diameter double-wall corrugated pipe is severely restricted.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: in order to solve the problems in the prior art, an improved rigid-flexible alloy pipe with a built-in elastic locking mechanism and a connection mode thereof are provided, and the problems in the prior art are solved.
The technical scheme adopted by the invention for solving the technical problems is as follows: a rigid-flexible alloy pipe with a built-in elastic locking mechanism and a connection mode thereof comprise an alloy pipe main body, an annular electromagnet, a bellmouth connector positioned on the left side of the alloy pipe main body and a socket joint positioned on the right side of the alloy pipe main body, wherein an inward-protruding integral-structure inner water guide ring is arranged on the inner side surface of the socket joint, the inner aperture of the inner water guide ring is gradually reduced from left to right, an annular assembly groove is formed in the right side surface of the inner water guide ring, a plurality of assembly blind holes with built-in iron extrusion springs are formed in the inner side surface of the annular assembly groove, an adjusting lever mechanism is fixedly connected to the position of the inner side surface of the annular assembly groove corresponding to the iron extrusion springs, an assembly limit ring is arranged on the inner side surface of the bellmouth connector, and a guide limit blind hole matched with the adjusting lever mechanism is formed, and an annular fixing groove for mounting an annular electromagnet is formed in the outer side surface of the alloy pipe main body.
Further, for convenient fixed connection, the spacing blind hole of direction be L type structure blind hole, adjust lever mechanism including fix at the installing support of annular assembly groove outside inner wall, fix fixed horizontal pole and swing joint on the installing support medial surface on fixed horizontal pole the upset limiting plate and fix the triangle stopper on upset limiting plate top, the nearly annular assembly groove end of upset limiting plate through transversely inserting inside and iron extrusion spring medial extremity fixed connection of iron extrusion spring.
Furthermore, in order to improve the sealing performance of the assembly surface, an integral sealing ring protruding leftwards is arranged at the edge position of the inner side surface of the left side surface of the assembly limiting ring, a rubber sealing sleeve is sleeved on the sealing ring, and an annular slot matched with the rubber sealing sleeve is formed in the right side surface of the inner water guide ring.
Furthermore, in order to match with external limitation, the left side surface of the socket connector is provided with an external limiting port, and the outer side surface of the annular electromagnet is provided with an external wiring seat which protrudes outwards and is positioned at the external limiting port.
Furthermore, in order to improve the sealing performance of the connecting surface, the inner side arc surface of the inner water guide ring is provided with three transmission sliding grooves, the inner side arc surface of the inner water guide ring is provided with an inner sealing ring, and the inner sealing ring is inserted into the transmission sliding grooves at the corresponding positions through the lateral sliding blocks on the outer side arc surface and is in sliding connection with the inner side arc surface of the inner water guide ring.
Further, in order to translate through hydraulic pushing, the left side of the inner side arc-shaped surface of the inner sealing ring is provided with an integral structural resistance ring.
Further, in order to improve the waterproof and antirust performance, the outer surface of the iron extrusion spring is wrapped with a flexible antirust coating.
Furthermore, in order to improve the limiting capacity, the outer side plane of the sealing ring, the inner side plane of the rubber sealing sleeve, the outer side plane of the rubber sealing sleeve and the inner side plane of the annular slot are provided with matched annular tooth surfaces.
A rigid-flexible alloy pipe with a built-in elastic locking mechanism and a connection mode thereof comprise the following steps: inserting a spigot joint into a socket joint of an adjacent alloy pipe main body, then inserting a triangular limiting block at the top end of an adjusting lever mechanism in the spigot joint into a guide limiting blind hole at a corresponding position, and clamping and fixing the two sections of alloy pipe main bodies through triangular limiting blocks, wherein the rubber sealing sleeves on the sealing rings are inserted into annular slots while clamping and fixing the two sections of alloy pipe main bodies, so that the sealing performance of the connecting ends is further improved, the sealing performance of the connecting ends and the sealing performance of the annular assembling slots are kept, when infusion is started in the inner part, the internal flow impacts a resistance ring, the internal sealing ring is driven to translate rightwards, and the connecting surface between the internal water guide ring and the assembling limiting ring is closed; when needs are dismantled, only need for the annular electromagnet power supply, the annular electromagnet extrudees the spring magnetic conduction to inboard iron, and iron extrudees the spring shrink, drives the spacing fast and the spacing blind hole of direction inside separation of triangle, then alright with extract the spacing blind hole of direction with the triangle stopper of adjusting lever mechanism top smoothly, accomplish the separation operation.
The invention has the beneficial effects that the rigid-flexible alloy pipe with the built-in elastic locking mechanism and the connection mode thereof are provided with the internal water guide ring and the assembly limit ring at the connection end of the socket connector and the socket connector, the right side surface of the internal water guide ring is provided with the annular assembly groove with the built-in elastic adjusting lever mechanism, the connector is fixed by inserting the triangular limit block at the top end of the adjusting lever mechanism into the guide limit blind hole, the annular fixing groove with the built-in annular electromagnet is formed on the outer side surface of the alloy pipe main body, and the adjusting lever mechanism is controlled to turn over by matching the annular electromagnet with an iron extrusion spring, so that the connection end can be conveniently disassembled when needed, and the sealing performance and the durability of the elastic adjusting lever mechanism are greatly improved by using the rubber sealing sleeve on the sealing ring and the internal sealing ring with the resistance.
Drawings
The invention is further illustrated with reference to the following figures and examples.
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a partial cross-sectional view of the position of the adjustment lever mechanism of the present invention.
FIG. 3 is a sectional view of the connection end of the alloy pipe main body and the inner water guide ring.
In the drawing, 1, an alloy pipe main body, 2, an annular electromagnet, 3, a bell mouth connector, 4, a socket connector, 5, an internal water guide ring, 6, an annular assembly groove, 7, an iron extrusion spring, 8, an assembly blind hole, 9, an adjusting lever mechanism, 10, an assembly limiting ring, 11, a guide limiting blind hole, 12, an annular fixing groove, 13, an installation support, 14, an overturning limiting plate, 15, a triangular limiting block, 16, a sealing ring, 17, a rubber sealing sleeve, 18, an annular slot, 19, an outer limiting port, 20, an external wiring seat, 21, a transmission sliding groove, 22, an internal sealing ring, 23, a lateral sliding block and 24 are resistance rings.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.
FIG. 1, FIG. 2 and FIG. 3 show a rigid-flexible alloy pipe with a built-in elastic locking mechanism and its connection method, comprising an alloy pipe main body 1, an annular electromagnet 2, a socket connector 3 located at the left side of the alloy pipe main body 1 and a socket connector 4 located at the right side of the alloy pipe main body 1, wherein the inner side of the socket connector 4 is provided with an internal water guide ring 5 protruding inwards, the inner diameter of the internal water guide ring 5 gradually decreases from left to right, the right side of the internal water guide ring 5 is provided with an annular assembly groove 6, the inner side of the annular assembly groove 6 is provided with 2 assembly blind holes 8 with built-in iron extrusion springs 7, the inner side of the annular assembly groove 6 is fixedly connected with an adjusting lever mechanism 9 corresponding to the iron extrusion springs 7, the inner side of the socket connector 3 is provided with an assembly limiting ring 10, the inner arc-shaped surface of the assembly limiting ring 10 is provided with a guiding and, an annular fixing groove 12 for mounting the annular electromagnet 2 is formed in the outer side surface of the alloy pipe main body 1.
Furthermore, in order to facilitate the fixed connection, the guiding limit blind hole 11 is an L-shaped structure blind hole, the adjusting lever mechanism 9 comprises a mounting bracket 13 fixed on the inner wall of the outer side of the annular assembling groove 6, a fixed cross rod fixed on the inner side surface of the mounting bracket 13, an overturning limit plate 14 movably connected on the fixed cross rod and a triangular limit block 15 fixed on the top end of the overturning limit plate 14, the end of the overturning limit plate 14 close to the annular assembling groove 6 is fixedly connected with the inner side end of the iron extrusion spring 7 by being transversely inserted into the iron extrusion spring 7, further, in order to improve the sealing performance of the assembling surface, the guiding limit blind hole 11 is an L-shaped structure blind hole, the edge position of the left side surface of the assembling limit ring 10 on the inner side surface is provided with an integral structure sealing ring 16 protruding leftwards, the sealing ring 16 is sleeved with a rubber sealing sleeve 17, further, in order to match with external limit, the left side surface of the socket connector 3 is provided with an external limit port 19, the outer side surface of the annular electromagnet 2 is provided with an external wiring seat 20 which is provided with an outward bulge at the position corresponding to the external limit port 19, further, in order to improve the sealing performance of the connecting surface, the inner side arc surface of the inner water guide ring 5 is provided with three transmission chutes 21, the inner side arc surface of the inner water guide ring 5 is provided with an inner sealing ring 22, the inner sealing ring 22 is inserted into the transmission chute 21 at the corresponding position through a lateral sliding block 23 on the outer side arc surface and is in sliding connection with the inner side arc surface of the inner water guide ring 5, further, in order to push translation through hydraulic power, the left side of the inner arc surface of the inner sealing ring 22 is provided with an integral structure resistance ring 24, further, in order to improve the waterproof, further, in order to improve the limiting capacity, the outer plane of the sealing ring 16, the inner plane and the outer plane of the rubber sealing sleeve 17 and the inner plane of the annular slot 18 are provided with matched annular tooth surfaces.
A rigid-flexible alloy pipe with a built-in elastic locking mechanism and a connection mode thereof comprise the following steps: inserting the socket joint 4 into the socket connector 3 of the adjacent alloy pipe main body 1, then inserting the triangular limiting block 15 at the top end of the adjusting lever mechanism 9 in the socket joint 4 into the guide limiting blind hole 11 at the corresponding position, and clamping and fixing the two sections of alloy pipe main bodies 1 by clamping and fixing the triangular limiting block 15 in the guide limiting blind hole 11 through the triangular limiting block 15, wherein the rubber sealing sleeve 17 on the sealing ring 16 is inserted into the annular slot 18 while clamping and fixing the two sections of alloy pipe main bodies, so that the sealing performance of the connecting end is further improved, the sealing performance of the connecting end and the annular assembling slot 6 is maintained, when infusion is started in the interior, the internal flow impacts the resistance ring 24 to drive the internal sealing ring 22 to translate rightwards, and therefore the connecting surface between the internal water guide ring; when needs are dismantled, only need for annular electromagnet 2 power supply, annular electromagnet 2 is to the inside iron extrusion spring 7 magnetic conduction, and iron extrusion spring 7 shrink drives the spacing fast 15 of triangle and the spacing blind hole 11 inside separation of direction, then alright with extract the spacing blind hole 11 of direction with the triangle stopper 15 on adjusting lever mechanism 9 top smoothly, accomplish the separation operation. The invention relates to a rigid-flexible alloy pipe with a built-in elastic locking mechanism and a connection mode thereof, an internal water guide ring 5 and an assembly limiting ring 10 are arranged at the connection end of a socket connector 3 and a socket connector 4, an annular assembling groove 6 with an elastic adjusting lever mechanism 9 arranged inside is arranged on the right side surface of the inner water guide ring 5, the connector is fixed by inserting a triangular limiting block 15 at the top end of the adjusting lever mechanism 9 into the guiding limiting blind hole 11, the annular fixing groove 12 with the built-in annular electromagnet 2 is arranged on the outer side surface of the alloy pipe main body 1, the adjusting lever mechanism 9 is controlled to turn by matching the annular electromagnet 2 with the iron extrusion spring 7, so as to facilitate the disassembly of the connection ends when required and to greatly improve the tightness and durability of the elastic adjustment lever mechanism 9 by means of the rubber sealing sleeve 17 on the sealing ring 16 and the inner sealing ring 22 with the resistance ring 24.
In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims (9)

1. The utility model provides a hard and soft alloy pipe and connected mode with built-in elasticity locking mechanism, includes alloy pipe main part (1), annular electromagnet (2), is located alloy pipe main part (1) left socket connector (3) and is located the socket joint (4) on alloy pipe main part (1) right side, characterized by: the inner side surface of the socket joint (4) is provided with an integral water guide ring (5) which protrudes inwards, the inner aperture of the inner water guide ring (5) is gradually reduced from left to right, the right side surface of the inner water guide ring (5) is provided with an annular assembling groove (6), a plurality of blind assembly holes (8) with iron extrusion springs (7) arranged inside are arranged on the inner side surface of the annular assembly groove (6), the inner side surface of the annular assembling groove (6) is fixedly connected with an adjusting lever mechanism (9) corresponding to the iron extrusion spring (7), the inner side surface of the socket connector (3) is provided with an assembly limiting ring (10), the arc surface at the inner side of the assembly limit ring (10) is provided with a guide limit blind hole (11) matched with the adjusting lever mechanism (9), an annular fixing groove (12) for mounting the annular electromagnet (2) is formed in the outer side surface of the alloy pipe main body (1).
2. The rigid-flexible alloy pipe with the built-in elastic locking mechanism and the connection mode thereof according to claim 1, wherein: spacing blind hole of direction (11) be L type structure blind hole, adjust lever mechanism (9) including fix installing support (13) at annular assembly groove (6) outside inner wall, fix fixed horizontal pole and swing joint on installing support (13) medial surface upset limiting plate (14) on fixed horizontal pole and fix triangle stopper (15) on upset limiting plate (14) top, nearly annular assembly groove (6) end of upset limiting plate (14) through transversely inserting inside and iron extrusion spring (7) inboard end fixed connection of iron extrusion spring (7).
3. The rigid-flexible alloy pipe with the built-in elastic locking mechanism and the connection mode thereof according to claim 1, wherein: the assembly limiting ring is characterized in that an integral sealing ring (16) protruding leftwards is arranged on the edge position of the inner side face of the left side face of the assembly limiting ring (10), a rubber sealing sleeve (17) is sleeved on the sealing ring (16), and an annular slot (18) matched with the rubber sealing sleeve (17) is formed in the right side face of the inner water guide ring (5).
4. The rigid-flexible alloy pipe with the built-in elastic locking mechanism and the connection mode thereof according to claim 1, wherein: the socket connector (3) left surface on seted up spacing mouthful (19) in the outside, annular electromagnet (2) lateral surface on have with spacing mouthful (19) in the outside position have outside bellied outside connection terminal (20).
5. The rigid-flexible alloy pipe with the built-in elastic locking mechanism and the connection mode thereof according to claim 1, wherein: the inner side arc-shaped surface of the inner water guide ring (5) is provided with three transmission sliding grooves (21), the inner side arc-shaped surface of the inner water guide ring (5) is provided with an inner sealing ring (22), and the inner sealing ring (22) is inserted into the transmission sliding grooves (21) at the corresponding positions through lateral sliding blocks (23) on the outer side arc-shaped surface and is in sliding connection with the inner side arc-shaped surface of the inner water guide ring (5).
6. The rigid-flexible alloy pipe with the built-in elastic locking mechanism and the connection mode thereof according to claim 5, wherein: the left side of the arc-shaped surface of the inner side of the inner sealing ring (22) is provided with a resistance ring (24) with an integrated structure.
7. The rigid-flexible alloy pipe with the built-in elastic locking mechanism and the connection mode thereof according to claim 1, wherein: the outer surface of the iron extrusion spring (7) is wrapped with a flexible antirust coating.
8. A rigid-flexible alloy pipe with built-in elastic locking mechanism and its connection mode as claimed in claim 3, wherein: and the outer side plane of the sealing ring (16), the inner side plane and the outer side plane of the rubber sealing sleeve (17) and the inner side plane of the annular slot (18) are provided with matched annular tooth surfaces.
9. A rigid-flexible alloy pipe with a built-in elastic locking mechanism and a connection mode thereof are characterized by comprising the following steps:
inserting the spigot joint (4) into the socket joint (3) of the adjacent alloy pipe main body (1), then a triangular limiting block (15) at the top end of an adjusting lever mechanism (9) in the socket joint (4) is inserted into a guiding limiting blind hole (11) at a corresponding position, the two sections of alloy pipe main bodies (1) are clamped and fixed through the triangular limiting block (15) clamped inside the guiding limiting blind hole (11), when the clamping and fixing are carried out, a rubber sealing sleeve (17) on the sealing ring (16) is inserted into the annular slot (18), thereby further improving the sealing performance of the connecting end, maintaining the sealing performance of the connecting end and the inner part of the annular assembling groove (6), when the transfusion is started inside, the internal flow impacts the resistance ring (24) to drive the inner sealing ring (22) to translate to the right, thereby closing the connecting surface between the inner water guide ring (5) and the assembly limiting ring (10); when needs are dismantled, only need for annular electromagnet (2) power supply, annular electromagnet (2) are to inside iron extrusion spring (7) magnetic conduction, and iron extrusion spring (7) shrink drives spacing (15) of triangle and leads spacing blind hole (11) inside separation, then alright with extract the spacing blind hole of direction (11) with the triangle stopper (15) that will adjust lever mechanism (9) top smoothly, accomplish the separation operation.
CN201911099834.1A 2019-11-12 2019-11-12 Rigid-flexible alloy pipe with built-in elastic locking mechanism and connection mode thereof Pending CN111059390A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201911099834.1A CN111059390A (en) 2019-11-12 2019-11-12 Rigid-flexible alloy pipe with built-in elastic locking mechanism and connection mode thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201911099834.1A CN111059390A (en) 2019-11-12 2019-11-12 Rigid-flexible alloy pipe with built-in elastic locking mechanism and connection mode thereof

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CN111059390A true CN111059390A (en) 2020-04-24

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112520015A (en) * 2020-11-25 2021-03-19 常州市长昊机械有限公司 Convertible aviation folding blade
CN112607003A (en) * 2020-11-25 2021-04-06 常州市长昊机械有限公司 Easily accomodate formula aviation blade
CN114992383A (en) * 2022-04-20 2022-09-02 天津建工城市建设发展有限公司 Pipeline installation method

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1432583A (en) * 1920-05-26 1922-10-17 Leo P Campbell Hose coupling
FR864814A (en) * 1939-12-22 1941-05-06 Watertight closing device
US2528369A (en) * 1946-08-22 1950-10-31 Philadelphia Valve Company Pipe or conduit coupling
CN207961766U (en) * 2018-03-01 2018-10-12 康命源(贵州)科技发展有限公司 A kind of hard and soft connection compo pipe of integral type
CN109373080A (en) * 2018-11-06 2019-02-22 四川东方聚源科技有限公司 A kind of solar energy solderless connector
CN208997525U (en) * 2018-09-18 2019-06-18 华电电力科学研究院有限公司 A kind of Thermal Automation on-site test equipment

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1432583A (en) * 1920-05-26 1922-10-17 Leo P Campbell Hose coupling
FR864814A (en) * 1939-12-22 1941-05-06 Watertight closing device
US2528369A (en) * 1946-08-22 1950-10-31 Philadelphia Valve Company Pipe or conduit coupling
CN207961766U (en) * 2018-03-01 2018-10-12 康命源(贵州)科技发展有限公司 A kind of hard and soft connection compo pipe of integral type
CN208997525U (en) * 2018-09-18 2019-06-18 华电电力科学研究院有限公司 A kind of Thermal Automation on-site test equipment
CN109373080A (en) * 2018-11-06 2019-02-22 四川东方聚源科技有限公司 A kind of solar energy solderless connector

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112520015A (en) * 2020-11-25 2021-03-19 常州市长昊机械有限公司 Convertible aviation folding blade
CN112607003A (en) * 2020-11-25 2021-04-06 常州市长昊机械有限公司 Easily accomodate formula aviation blade
CN112607003B (en) * 2020-11-25 2023-06-20 常州市长昊机械有限公司 Easily accomodate formula aviation blade
CN112520015B (en) * 2020-11-25 2023-06-20 常州市长昊机械有限公司 Convertible aviation folding blade
CN114992383A (en) * 2022-04-20 2022-09-02 天津建工城市建设发展有限公司 Pipeline installation method
CN114992383B (en) * 2022-04-20 2024-04-05 天津建工城市建设发展有限公司 Pipeline installation method

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Effective date of abandoning: 20211217