CN109210277A - Ground library external wall waterproof casing installation method - Google Patents
Ground library external wall waterproof casing installation method Download PDFInfo
- Publication number
- CN109210277A CN109210277A CN201811116794.2A CN201811116794A CN109210277A CN 109210277 A CN109210277 A CN 109210277A CN 201811116794 A CN201811116794 A CN 201811116794A CN 109210277 A CN109210277 A CN 109210277A
- Authority
- CN
- China
- Prior art keywords
- tube body
- spring
- fixedly installed
- installing pipe
- waterproof casing
- 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.)
- Granted
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Classifications
-
- 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
- F16L5/00—Devices for use where pipes, cables or protective tubing pass through walls or partitions
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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
- F16L5/00—Devices for use where pipes, cables or protective tubing pass through walls or partitions
- F16L5/02—Sealing
- F16L5/027—Sealing by means of a joint of the quick-acting type
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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
- F16L5/00—Devices for use where pipes, cables or protective tubing pass through walls or partitions
- F16L5/02—Sealing
- F16L5/10—Sealing by using sealing rings or sleeves only
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bulkheads Adapted To Foundation Construction (AREA)
- Special Wing (AREA)
Abstract
The present invention relates to water string technical fields, and disclose ground library external wall waterproof casing installation method, including installing pipe, the inner cavity of the installing pipe is plugged with tube body, the inner cavity left wall upper and lower ends of the installing pipe offer holding tank, the groove top wall of the holding tank is fixedly installed with the first spring, first spring is fixedly installed with the portable pillar that one end is located at holding tank inner cavity far from one end of holding tank groove top wall, the portable pillar is movably installed with the pulley being slidably connected with tube body far from one end of the first spring, the outer surface of the tube body is socketed with the annulus on the right side of portable pillar.The ground library external wall waterproof casing installation method, pass through the installing pipe being socketed in the outer surface of tube body, device is set to be not easy to damage tube body when installation, and the first spring and portable pillar of installation, it connect device when replacing diameter difference tube body with pulley, using annulus and clamping apparatus very convenient, and install, keep device handling very convenient.
Description
Technical field
The present invention relates to water string technical fields, specially library external wall waterproof casing installation method.
Background technique
Water string is that pipeline passes through railway, road, street etc., to prevent pipeline to be subject to crushing by load, and in pipeline
The protective cannula of outside setting, water string are divided into rigid waterproof sleeve and soft waterproof casing, and rigid waterproof sleeve is steel
Manage additional wing ring；Soft waterproof casing is in addition to external wing ring, and there are also ring washers etc for inside.
Ground library external wall waterproof casing installation method currently on the market is very troublesome when in use, installation when
Time is likely to result in anti-using very inconvenient and common ground library exterior wall when tube body damage, maintenance or replacement
Jacket pipe installation method fits up unusual inconvenience, and poor sealing when in use when in use, so propose
Ground library external wall waterproof casing installation method.
Summary of the invention
(1) the technical issues of solving
In view of the deficiencies of the prior art, the present invention provides ground library external wall waterproof casing installation method, has good airproof performance
The advantages that, solve the problems, such as maintenance inconvenience and poor sealing.
(2) technical solution
To realize above-mentioned maintenance inconvenience and poor sealing purpose, the invention provides the following technical scheme: ground library exterior wall
Water string installation method, including installing pipe, the inner cavity of the installing pipe are plugged with tube body, in the inner cavity left wall of the installing pipe
Lower both ends offer holding tank, and the groove top wall of the holding tank is fixedly installed with the first spring, and first spring is far from appearance
Receiving one end of slot groove top wall is fixedly installed with the portable pillar that one end is located at holding tank inner cavity, and the portable pillar is far from the first spring
One end is movably installed with the pulley being slidably connected with tube body, and the outer surface of the tube body is socketed with the circle on the right side of portable pillar
Ring, the outer surface upper and lower ends of the annulus are fixedly installed with the clamping apparatus being connected with portable pillar, the tube body it is outer
The sealing device being connected with installing pipe internal chamber wall is fixedly installed on the right side of surface.
Preferably, the clamping apparatus includes the cushion for being mounted on the right surface of portable pillar, the fixed peace in the inner cavity of the cushion
Equipped with sensing chip, the right surface of the cushion is fixedly installed with the link block that annulus is connected, and the outer surface of the annulus opens up
There is a card slot, the outer surface upper and lower ends of the annulus are movably installed with positioned at card slot both ends and the rolling that is connected with installing pipe
Wheel, the inner cavity of the card slot are plugged with card column, and the internal chamber wall of the installing pipe offers the placing groove on the right side of holding tank, institute
The slot inner wall for stating placing groove is fixedly installed with the telescoping mechanism being connected with card column, and the left surface of the telescoping mechanism is fixedly mounted
There is the inductor being connected with placing groove slot inner wall.
Preferably, the sealing device includes the sealing necklace being socketed on the right side of outer surface of tube body, the sealing necklace
Inner surface opens up fluted, and the inner cavity of the groove is movably installed with the fixture block that one end is connected with tube body, the sealing necklace
Outer surface offer inverted draw cut, the slot inner wall of the inverted draw cut is movably installed with movable plate, the fixed peace in the outer surface of the movable plate
The fixed link of fixture block inner cavity is plugged in equipped with one end, the movable plate is fixedly installed with far from the outer surface both ends of fixed link
Two springs, the second spring are fixedly installed with removable cover far from one end of movable plate, and the left end of the removable cover is fixedly mounted
There is the torsional spring being connected with inverted draw cut slot inner wall.
Preferably, the quantity at least two of the portable pillar, and the shape of portable pillar is cylinder, the portable pillar is in
Internal chamber wall surrounding of the circular distribution in installing pipe.
Preferably, the quantity at least two of the cushion, and the shape of cushion be U-shape, the cushion with a thickness of
One centimetre to three centimetres.
Preferably, the quantity at least two of the link block, and the material of link block is rubber, the shape of the link block
Shape is cylinder.
Preferably, the quantity at least two of the card column, and the length of card column is less than the length of telescoping mechanism.
Preferably, the quantity at least two of the idler wheel, and the rounded outer surface surrounding for being distributed in annulus of idler wheel.
Preferably, the quantity of the second spring is at least four, and second spring is to squeeze spring.
Preferably, the engineering method of ground library external wall waterproof casing installation, it is characterised in that:
1, installing pipe is mounted in wall, fixing-stable, then tube body outer surface right end socket sealing necklace with
Fixture block clamping；
2, fixing sleeve on the left of the outer surface of tube body is connected to annulus, by tube body grafting and installing pipe, when grafting
Removable cover can push movable plate, to make the inner cavity of fixed link grafting and fixture block；
3, it can be slidably connected with pulley while tube body is inserted into, when link block is connected with cushion, squeeze sense
Piece is answered, makes inductor drive telescoping mechanism mobile, to be connected in the card slot of annulus outer surface, to complete to install.
(3) beneficial effect
Compared with prior art, the present invention provides ground library external wall waterproof casing installation method, have it is following the utility model has the advantages that
1, the ground library external wall waterproof casing installation method makes device exist by the installing pipe being socketed in the outer surface of tube body
It is not easy to damage tube body when installation, and the first spring and portable pillar of installation, keeps device replacement diameter different
It is connect when tube body with pulley, use is very convenient, and the annulus and clamping apparatus of installation, makes device handling very side
Just.
2, the ground library external wall waterproof casing installation method passes through being connected with installing pipe of being socketed in the outer surface of tube body
Necklace is sealed, the case where making the good airproof performance of device inner cavity, not will cause leak, and fixture block, fixed link and the activity of installation
Plate keeps sealing necklace installation more stable, and the second spring and torsional spring of installation, drive activity while opening removable cover
Plate and fixed link rise, and use is very convenient.
Detailed description of the invention
Fig. 1 is ground proposed by the present invention library external wall waterproof casing installation method structure sectional view；
Fig. 2 is the portion A enlarged drawing in ground proposed by the present invention library external wall waterproof casing installation method structure chart 1；
Fig. 3 is the portion B enlarged drawing in ground proposed by the present invention library external wall waterproof casing installation method structure chart 1.
In figure: 1 installing pipe, 2 tube bodies, 3 holding tanks, 4 first springs, 5 portable pillars, 6 pulleys, 7 annulus, 8 clamping apparatus, 81
It is cushion, 82 sensing chips, 83 link blocks, 84 card slots, 85 idler wheels, 86 card columns, 87 placing grooves, 88 telescoping mechanisms, 89 inductors, 9 close
Seal apparatus, 91 sealing necklaces, 92 grooves, 93 fixture blocks, 94 inverted draw cuts, 95 movable plates, 96 fixed links, 97 second springs, 98 removable covers,
99 torsional springs.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Fig. 1-3, ground library external wall waterproof casing installation method, including installing pipe 1, the inner cavity of installing pipe 1 is please referred to be plugged with
Tube body 2 makes device be not easy to cause to damage to tube body 2 when installation by the installing pipe 1 being socketed in the outer surface of tube body 2
It is bad, and the first spring 4 and portable pillar 5 of installation, it connect device when replacing diameter difference tube body 2 with pulley 6, using very
Convenience, and installation annulus 7 and clamping apparatus 8, make device handling it is very convenient, pass through the appearance surface cover in tube body 2
The sealing necklace 91 being connected with installing pipe 1 connect, the case where making the good airproof performance of device inner cavity, not will cause leak, and
Fixture block 93, fixed link 96 and the movable plate 95 of installation make to seal the installation of necklace 91 second spring that is more stable, and installing
97 and torsional spring 99, drive movable plate 95 and fixed link 96 to rise while opening removable cover 98, use is very convenient；
The inner cavity left wall upper and lower ends of installing pipe 1 offer holding tank 3, and the groove top wall of holding tank 3 is fixedly installed with
One spring 4, the first spring 4 are fixedly installed with the portable pillar that one end is located at 3 inner cavity of holding tank far from one end of 3 groove top wall of holding tank
5, the quantity at least two of portable pillar 5, and the shape of portable pillar 5 is cylinder, portable pillar 5 is rounded to be distributed in installing pipe 1
Internal chamber wall surrounding, portable pillar 5 is movably installed with the pulley 6 being slidably connected with tube body 2, tube body 2 far from one end of the first spring 4
Outer surface be socketed with the annulus 7 positioned at the right side of portable pillar 5, the outer surface upper and lower ends of annulus 7 are fixedly installed with and activity
The clamping apparatus 8 that column 5 is connected；
Cushion 81 of the clamping apparatus 8 including being mounted on the right surface of portable pillar 5, the quantity at least two of cushion 81, and it is soft
The shape of pad 81 be U-shape, cushion 81 with a thickness of one centimetre to three centimetres, the inner cavity of cushion 81 is fixedly installed with sensing chip
82, the right surface of cushion 81 is fixedly installed with the link block 83 that annulus 7 is connected, the quantity at least two of link block 83, and
The material of link block 83 is rubber, and the shape of link block 83 is cylinder, and the outer surface of annulus 7 offers card slot 84, annulus 7
Outer surface upper and lower ends are movably installed with positioned at 84 both ends of card slot and the idler wheel 85 that is connected with installing pipe 1, the peace of idler wheel 85
Dress, makes enhanced convenience when grafting of tube body 2, the quantity at least two of idler wheel 85, and idler wheel 85 is rounded is distributed in
The outer surface surrounding of annulus 7, the inner cavity of card slot 84 are plugged with card column 86, and card column 86 plays the role of limit, the number of card column 86
Amount at least two, and the length of card column 86 is less than the length of telescoping mechanism 88, the internal chamber wall of installing pipe 1 is offered to be located at and be accommodated
The placing groove 87 on 3 right side of slot, the slot inner wall of placing groove 87 are fixedly installed with the telescoping mechanism 88 being connected with card column 86, telescopic machine
The left surface of structure 88 is fixedly installed with the inductor 89 being connected with 87 slot inner wall of placing groove, fixes on the right side of the outer surface of tube body 2
The sealing device 9 being connected with 1 internal chamber wall of installing pipe is installed；
Sealing device 9 includes the sealing necklace 91 being socketed on the right side of 2 outer surface of tube body, and the inner surface of sealing necklace 91 opens up
Fluted 92, the inner cavity of groove 92 is movably installed with the fixture block 93 that one end is connected with tube body 2, and the outer surface of sealing necklace 91 is opened
Equipped with inverted draw cut 94, the slot inner wall of inverted draw cut 94 is movably installed with movable plate 95, and the outer surface of movable plate 95 is fixedly installed with one end and inserts
It is connected to the fixed link 96 of 93 inner cavity of fixture block, movable plate 95 is fixedly installed with second spring far from the outer surface both ends of fixed link 96
97, the installation of second spring 97, the inner cavity for being plugged on fixture block 93 for alloing device fix fixed link 96 when grafting,
Keep the sealing installation of necklace 91 more stable, the quantity of second spring 97 is at least four, and second spring 97 is to squeeze spring,
Second spring 97 is fixedly installed with removable cover 98 far from one end of movable plate 95, and the left end of removable cover 98 is fixedly installed with and inverted draw cut
The torsional spring 99 that 94 slot inner walls are connected.
The engineering method of ground library external wall waterproof casing installation, it is characterised in that:
1, installing pipe 1 is mounted in wall, fixing-stable, then in the outer surface right end socket sealing necklace of tube body 2
91 are clamped with fixture block 93；
2, fixing sleeve on the left of the outer surface of tube body 2 is connected to annulus 7, by 2 grafting of tube body and installing pipe 1, in grafting
When removable cover 98 movable plate 95 can be pushed, to make the inner cavity of fixed link 96 grafting and fixture block 93；
3, it can be slidably connected with pulley 6 while tube body 2 is inserted into, when link block 83 is connected with cushion 81,
Sensing chip 82 is squeezed, makes inductor 89 drive telescoping mechanism 88 mobile, to be connected in the card slot 84 positioned at 7 outer surface of annulus
In, to complete to install.
In conclusion the ground library external wall waterproof casing installation method, is socketed on the right side of the outer surface of tube body 2 positioned at fixture block
The sealing necklace 91 of 93 outer surfaces, can be such that removable cover 98 presses in inverted draw cut 94 when tube body 2 is moved to the left, removable cover 98
While decline, it is plugged in fixed link 96 in the inner cavity of fixture block 93, while tube body 2 slides when mobile with pulley 6
Connection, so that the link block 83 positioned at 7 left outer surface of annulus be made to be connected with cushion 81, pressure can make 82 dynamic of sensing chip
The inner cavity for answering device 89 that the card column 86 of 88 inner cavity of telescoping mechanism is caused to be connected in card slot 84.
It should be noted that, in this document, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to
Non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or equipment
Intrinsic element.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (9)
1. ground library external wall waterproof casing installation method, including installing pipe (1), it is characterised in that: insert the inner cavity of the installing pipe (1)
It is connected to tube body (2), the inner cavity left wall upper and lower ends of the installing pipe (1) offer holding tank (3), the holding tank (3)
Groove top wall is fixedly installed with the first spring (4), and first spring (4) is fixedly mounted far from one end of holding tank (3) groove top wall
There is one end to be located at the portable pillar (5) of holding tank (3) inner cavity, the portable pillar (5) is installed far from one end activity of the first spring (4)
There is the pulley (6) being slidably connected with tube body (2), the outer surface of the tube body (2) is socketed with the annulus on the right side of portable pillar (5)
(7), the outer surface upper and lower ends of the annulus (7) are fixedly installed with the clamping apparatus (8) being connected with portable pillar (5), institute
It states and is fixedly installed with the sealing device (9) being connected with installing pipe (1) internal chamber wall on the right side of the outer surface of tube body (2).
2. ground according to claim 1 library external wall waterproof casing installation method, it is characterised in that: the clamping apparatus (8)
Cushion (81) including being mounted on portable pillar (5) right surface, the inner cavity of the cushion (81) are fixedly installed with sensing chip (82), institute
The right surface for stating cushion (81) is fixedly installed with the link block (83) that annulus (7) is connected, and the outer surface of the annulus (7) opens up
Have card slot (84), the outer surface upper and lower ends of the annulus (7) are movably installed with positioned at card slot (84) both ends and and installing pipe
(1) inner cavity of the idler wheel (85) being connected, the card slot (84) is plugged with card column (86), and the internal chamber wall of the installing pipe (1) is opened
Equipped with the placing groove (87) being located on the right side of holding tank (3), the slot inner wall of the placing groove (87) is fixedly installed with and card column (86)
The telescoping mechanism (88) being connected, the left surface of the telescoping mechanism (88) is fixedly installed with to be connected with placing groove (87) slot inner wall
The inductor (89) connect.
3. ground according to claim 1 library external wall waterproof casing installation method, it is characterised in that: the sealing device (9)
Including the sealing necklace (91) being socketed on the right side of tube body (2) outer surface, the inner surface of sealing necklace (91) opens up fluted
(92), the inner cavity of the groove (92) is movably installed with the fixture block (93) that one end is connected with tube body (2), the sealing necklace
(91) outer surface offers inverted draw cut (94), and the slot inner wall of the inverted draw cut (94) is movably installed with movable plate (95), the activity
The outer surface of plate (95) is fixedly installed with the fixed link (96) that one end is plugged in fixture block (93) inner cavity, and the movable plate (95) is separate
The outer surface both ends of fixed link (96) are fixedly installed with second spring (97), and the second spring (97) is far from movable plate (95)
One end be fixedly installed with removable cover (98), the left end of the removable cover (98) is fixedly installed with to be connected with inverted draw cut (94) slot inner wall
The torsional spring (99) connect.
4. ground according to claim 1 library external wall waterproof casing installation method, it is characterised in that: the portable pillar (5)
Quantity at least two, and the shape of portable pillar (5) is cylinder, the portable pillar (5) is rounded to be distributed in installing pipe (1)
Internal chamber wall surrounding.
5. ground according to claim 2 library external wall waterproof casing installation method, it is characterised in that: the number of the cushion (81)
Amount at least two, and the shape of cushion (81) be U-shape, the cushion (81) with a thickness of one centimetre to three centimetres.
6. ground according to claim 2 library external wall waterproof casing installation method, it is characterised in that: the link block (83)
Quantity at least two, and the material of link block (83) is rubber, the shape of the link block (83) is cylinder.
7. ground according to claim 2 library external wall waterproof casing installation method, it is characterised in that: the number of the card column (86)
Amount at least two, and the length of card column (86) is less than the length of telescoping mechanism (88).
8. ground according to claim 2 library external wall waterproof casing installation method, it is characterised in that: the number of the idler wheel (85)
Amount at least two, and the rounded outer surface surrounding for being distributed in annulus (7) of idler wheel (85).
9. ground according to claim 3 library external wall waterproof casing installation method, it is characterised in that: the second spring (97)
Quantity be at least four, and second spring (97) is to squeeze spring.
The engineering method of ground library external wall waterproof casing installation, it is characterised in that:
1, installing pipe 1 is mounted in wall, fixing-stable, then in the outer surface right end socket sealing necklace of tube body (2)
(91) it is clamped with fixture block (93)；
2, fixing sleeve on the left of the outer surface of tube body (2) is connected to annulus (7), by tube body (2) grafting and installing pipe (1), inserted
Removable cover (98) can push movable plate (95) when connecing, to make the inner cavity of fixed link (96) grafting Yu fixture block (93)；
3, it can be slidably connected with pulley (6) while tube body (2) are inserted into, when link block (83) is connected with cushion (81)
It waits, squeezes sensing chip (82), make inductor (89) to drive telescoping mechanism (88) mobile, to be connected in positioned at 7 outer surface of annulus
Card slot (84) in, to complete to install.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811116794.2A CN109210277B (en) | 2018-09-25 | 2018-09-25 | Installation method of waterproof sleeve of external wall of ground warehouse |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811116794.2A CN109210277B (en) | 2018-09-25 | 2018-09-25 | Installation method of waterproof sleeve of external wall of ground warehouse |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109210277A true CN109210277A (en) | 2019-01-15 |
| CN109210277B CN109210277B (en) | 2021-05-28 |
Family
ID=64985218
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811116794.2A Active CN109210277B (en) | 2018-09-25 | 2018-09-25 | Installation method of waterproof sleeve of external wall of ground warehouse |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109210277B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111864665A (en) * | 2020-08-05 | 2020-10-30 | 安徽铭泰仪表有限公司 | Fixing device of cable bridge |
| CN112212082A (en) * | 2020-09-19 | 2021-01-12 | 湖南凡工建筑工程有限公司 | Water supply wall bushing for indoor decoration project |
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| CN107990069A (en) * | 2017-11-22 | 2018-05-04 | 惠州市多普勒通信有限公司 | A kind of easy-to-dismount chemical industry transmission pipeline |
| CN207470956U (en) * | 2017-11-22 | 2018-06-08 | 天津晋华汽车配件有限公司 | A kind of brake pipe joint |
| CN207750655U (en) * | 2018-01-22 | 2018-08-21 | 青岛凯瑞特精密机械有限公司 | A kind of safety trocar structure |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111864665A (en) * | 2020-08-05 | 2020-10-30 | 安徽铭泰仪表有限公司 | Fixing device of cable bridge |
| CN112212082A (en) * | 2020-09-19 | 2021-01-12 | 湖南凡工建筑工程有限公司 | Water supply wall bushing for indoor decoration project |
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