CN113738986A - Connecting assembly of HDPE hollow wall winding pipe - Google Patents
Connecting assembly of HDPE hollow wall winding pipe Download PDFInfo
- Publication number
- CN113738986A CN113738986A CN202111085655.XA CN202111085655A CN113738986A CN 113738986 A CN113738986 A CN 113738986A CN 202111085655 A CN202111085655 A CN 202111085655A CN 113738986 A CN113738986 A CN 113738986A
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- Prior art keywords
- sleeve
- shaped
- arc
- hollow wall
- guide rod
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- Granted
Links
- 229920001903 high density polyethylene Polymers 0.000 title claims abstract description 17
- 239000004700 high-density polyethylene Substances 0.000 title claims abstract description 17
- 238000004804 winding Methods 0.000 title claims abstract description 15
- 230000000670 limiting effect Effects 0.000 claims description 24
- 238000007906 compression Methods 0.000 claims description 15
- 230000006835 compression Effects 0.000 claims description 14
- 238000007789 sealing Methods 0.000 claims description 11
- 230000008878 coupling Effects 0.000 claims description 8
- 238000010168 coupling process Methods 0.000 claims description 8
- 238000005859 coupling reaction Methods 0.000 claims description 8
- 210000001503 joint Anatomy 0.000 abstract description 6
- 230000000694 effects Effects 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 238000013459 approach Methods 0.000 description 4
- 238000001125 extrusion Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 239000010865 sewage Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
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
- F16L47/00—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics
- F16L47/06—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics with sleeve or socket formed by or in the pipe end
- F16L47/12—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics with sleeve or socket formed by or in the pipe end 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
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L37/00—Couplings of the quick-acting type
- F16L37/08—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members
- F16L37/084—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members combined with automatic locking
- F16L37/0841—Couplings 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 a transversally slidable locking member surrounding the tube
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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
- F16L37/00—Couplings of the quick-acting type
- F16L37/08—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members
- F16L37/084—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members combined with automatic locking
- F16L37/086—Couplings 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 latching members pushed radially by spring-like elements
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Quick-Acting Or Multi-Walled Pipe Joints (AREA)
Abstract
The invention discloses a connecting component of a HDPE hollow wall winding pipe, wherein a connecting unit comprises a sleeve, a positioning block, a guide rod and a fixing component, rectangular grooves are symmetrically formed in the end surface of the sleeve respectively, the positioning block and the fixing component are positioned in the rectangular grooves, one surface of the positioning block close to a rectangular groove opening is connected with the guide rod, the other end of the guide rod extends out of the rectangular groove, a trapezoidal groove is formed in the end part of the guide rod extending outwards, the guide rod of the connecting unit is matched and fixed with the fixing component of the other connecting unit, and the problem that labor and time are consumed due to repeated adjustment in the radial direction and the longitudinal direction during butt joint is solved.
Description
Technical Field
The invention relates to the technical field of pipeline equipment, in particular to a connecting assembly of HDPE hollow wall winding pipes.
Background
The connection between the existing HDPE hollow wall winding pipes usually adopts the connection forms of socket joint connection, heat shrinkable belt connection, stainless steel clamp connection, heat shrinkable sleeve connection and the like, a socket joint connection mode is adopted, one end of a pipeline is a bell mouth, and the other end of the pipeline is a socket, the bell mouth and the socket need to be aligned accurately during construction, the other connection modes all need to operate the two pipelines, but the two pipelines need to be adjusted repeatedly in the radial direction and the longitudinal direction during butt joint, the pipeline quality is heavier, the adjustment is inconvenient, the pipeline connection construction efficiency is low, manpower is consumed, the socket joint connection mode in the life at present is not firm, and fracture is easy to occur.
Disclosure of Invention
The invention aims to provide a connecting component of an HDPE hollow wall winding pipe, which is used for solving the problem that labor and time are consumed due to repeated adjustment in the radial direction and the longitudinal direction during butt joint.
The invention is realized by the following technical scheme:
the utility model provides a coupling assembling of cavity wall winding pipe in HDPE, includes two coupling units, coupling unit includes sleeve pipe, locating piece, guide bar and fixed subassembly, the rectangular channel has been seted up to sheathed tube terminal surface symmetry respectively, the locating piece with fixed subassembly is located the rectangular channel, the locating piece be close to the one side of rectangle notch with the guide bar links to each other, the other end of guide bar to the rectangular channel extends outward, the trapezoidal channel has been seted up on the outside tip that extends of guide bar, coupling unit's guide bar and another coupling unit's fixed subassembly cooperatees and fixes.
The operation that other connected modes could be carried out after the hollow wall winding pipe of present HDPE need be with accurate alignment between two pipes usually, but need the adjustment that relapse in radial and vertical when the butt joint, and the pipeline quality is heavier, and the adjustment is inconvenient, and the pipe connection efficiency of construction is low, consumes manpower and time.
According to the invention, the connecting units are arranged on the inner walls of the outer circumferences of the two hollow wall winding pipes, the sleeves are arranged on the two connecting units, when the sleeves of the two hollow wall winding pipes are relatively close to each other, the guide rods on the sleeves approach to the fixing component on the other sleeve, and after the guide rods contact the fixing component, the fixing component fixes the guide rods, so that the two sleeves are tightly fixed together, and therefore, the two hollow wall winding pipes can be matched with each other when in contact, and can be rapidly butted and fixed.
Further, the fixing assembly comprises a fixing block and a compression spring, a blind hole is formed in the fixing block, the compression spring is connected with the bottom of the blind hole, and the other end of the compression spring is connected with a special-shaped bump matched with the trapezoidal groove in the end portion of the guide rod. The lower end of the special-shaped lug is arranged in the blind hole, and the upper end of the special-shaped lug extends outwards. The distance from the positioning block to the trapezoidal groove along the axis direction of the sleeve is A, the distance from the fixing block to the trapezoidal groove along the axis direction of the sleeve is B, and B & gtA is satisfied.
The invention makes the two sleeves on the hollow wall winding pipe approach each other, the guide rod on the sleeve approaches to the other special-shaped convex block, the guide rod contacts with the inclined plane on one side of the special-shaped convex block, the special-shaped convex block is pressed by a certain extrusion force, the special-shaped convex block is driven to move downwards by the force which causes the compression spring to generate downward deformation, the special-shaped convex block moves downwards to generate a gap for the guide rod to move forwards, after the guide rod moves forwards continuously, because the end part of the guide rod is provided with the trapezoidal groove matched with the shape of the special-shaped block, the trapezoidal groove of the guide rod is matched and clamped with the special-shaped convex block, when the guide rod stirs the special-shaped convex block to move, the lower end of the special-shaped block is positioned in the fixed block, so that the guide rod is pressed by resistance and can not move horizontally, when the water flow in the pipeline vibrates, the guide rod is pressed by a backward water flow, at the time, the guide rod is clamped with the special-shaped convex block, backward movement cannot be performed, so that the clamping degree is higher than that between pipelines in the prior art; if A > B, the fixed block is closer to the notch of the trapezoidal groove than the positioning block, and the guide rod is obstructed when approaching the special-shaped block.
Further, be equipped with the sealing washer on linkage unit's the sleeve pipe terminal surface, another be equipped with on linkage unit's the sleeve pipe terminal surface with sealing washer matched with annular groove, the sleeve pipe that winds on the pipe when two cavity walls is close to each other can laminate, because the dovetail groove of guide bar cooperatees with special-shaped lug, has relative effect and acts on two sleeves, and two sleeves receive the extrusion back of this power, and the sealing washer on the sleeve pipe and the annular groove extrusion fit on another sleeve pipe form an inclosed environment, prevent that intraductal water from leading to the back, intraductal sewage reveals away.
Furthermore, an arc-shaped plate and an arc-shaped groove I are further arranged on the end face of the sleeve, and when the sleeve moves relatively, the arc-shaped groove I of the connecting unit is in matched contact with the arc-shaped plate of the other connecting unit, and the trapezoid groove of the connecting unit is matched with the special-shaped convex block of the other connecting unit.
When the two sleeves are close to each other, the arc-shaped plates can serve as a guide to enhance the alignment force, after the arc-shaped plates are aligned with the corresponding arc-shaped recesses I, the two sleeves are attached to each other, the arc-shaped plates of the two pipe bodies are matched with the arc-shaped recesses I, the trapezoid grooves of the connecting units are matched with the special-shaped convex blocks of the other connecting unit, the arc-shaped plates are aligned with the corresponding arc-shaped recesses I, repeated adjustment in the radial direction and the longitudinal direction is not needed, and the sealing enhancement effect can be achieved.
Further be equipped with the connecting block on the arc, be equipped with the carriage release lever on the connecting block, the end connection of carriage release lever has the gag lever post, the free end of gag lever post pass through the torsional spring with the carriage release lever is connected, the free end of gag lever post with the vertical distance of carriage release lever is greater than the internal diameter of through hole.
According to the invention, the two sleeves are close to each other, the limiting rod on each sleeve is connected with the moving rod to form a tip, when the tip penetrates into the through hole, the limiting rod is extruded, the vertical distance between the limiting rod and the moving rod is reduced until the vertical distance is smaller than the inner diameter of the through hole, the limiting rod can smoothly pass through the through hole, the elastic force of the limiting rod is restored after the limiting rod passes through the through hole, the vertical distance between the limiting rod and the moving rod is restored to an initial state, after the moving rod loses thrust, the limiting rod moves backwards, the gap is larger than the inner diameter of the through hole, the limiting rod cannot move to fix the limiting rod, the fixing effect is enhanced, and the HDPE hollow wall winding pipe is lighter than a common steel pipe material, and the limiting effect achieved by the limiting rod can play a certain auxiliary effect.
Compared with the prior art, the invention has the following advantages and beneficial effects:
1. according to the invention, the connecting unit comprises the sleeve, the positioning block, the guide rod and the fixing component, the rectangular groove is formed in the cross section of the sleeve, the positioning block and the fixing component are positioned in the rectangular groove, one side of the positioning block, which is close to the rectangular groove opening, is connected with the guide rod, the other end of the guide rod extends out of the rectangular groove, the end part of the guide rod, which extends out, is provided with the trapezoidal groove, the guide rod of the connecting unit is matched and fixed with the fixing component of the other connecting unit, and the problem that labor and time are consumed due to repeated adjustment in the radial direction and the longitudinal direction during butt joint is solved.
2. According to the invention, the fixing component comprises the fixing block and the compression spring, the fixing block is internally provided with the blind hole, the compression spring is connected with the bottom of the blind hole, the other end of the compression spring is connected with the special-shaped lug matched with the trapezoidal groove on the end part of the guide rod, the lower end of the special-shaped lug is arranged in the blind hole, the upper end of the special-shaped lug extends outwards, the distance from the positioning block to the trapezoidal groove along the axial direction of the sleeve is A, the distance from the fixing block to the trapezoidal groove along the axial direction of the sleeve is B, B & gt A is satisfied, and the clamping degree is higher than the clamping degree between pipelines in the prior art.
3. According to the invention, the arc-shaped plates and the arc-shaped grooves I are further arranged on the end surfaces of the sleeves, when the two sleeves move relatively, the arc-shaped grooves I of the connecting units are in matched contact with the arc-shaped plate of the other connecting unit, and meanwhile, the trapezoidal grooves of the connecting units are matched with the special-shaped bumps of the other connecting unit, so that the sealing effect can be enhanced.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
FIG. 1 is a schematic view of the internal structure of a rectangular groove according to the present invention;
FIG. 2 is a schematic view of the internal structure of the arc plate and the arc groove I of the invention;
FIG. 3 is a schematic view showing the movement process of the guide bar and the shaped projection of the present invention;
FIG. 4 is a schematic diagram of the movement process of the arc plate and the arc groove I of the invention;
fig. 5 is a top view of the present invention.
Reference numbers and corresponding part names in the drawings:
1-sleeve, 2-locating block, 3-guide rod, 4-rectangular groove, 5-fixed block, 6-compression spring, 7-special-shaped lug, 8-arc plate, 9-arc groove I, 10-connecting block, 11-elastic plate body, 12-sealing ring, 13-annular groove, 14-trapezoidal groove, 15-limiting rod, 16-through hole and 17-moving rod.
Detailed description of the preferred embodiments
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention.
Example (b):
as shown in fig. 1 to 5, the present invention includes two connection units, the connection units include a sleeve 1, a positioning block 2, a guide rod 3 and a fixing component, rectangular grooves 4 are symmetrically formed on end surfaces of the sleeve 1, the positioning block 2 and the fixing component are located in the rectangular grooves 4, the positioning block 2 is connected to the guide rod 3 at a surface close to an opening of the rectangular groove 4, the other end of the guide rod 3 extends outward of the rectangular groove 4, a trapezoidal groove 14 is formed on an end portion of the guide rod 3 extending outward, the guide rod 3 of the connection unit is fixed by being matched with the fixing component of the other connection unit, the fixing component includes a fixing block 5 and a compression spring 6, a blind hole is formed inside the fixing block 5, the compression spring 6 is connected to the bottom of the blind hole, the other end of the compression spring 6 is connected to a special-shaped bump 7 matched with the trapezoidal groove 14 on the end portion of the guide rod 3, the lower end of the special-shaped bump 7 is placed in the blind hole, the upper end of the special-shaped lug 7 extends outwards, the distance from the positioning block 2 to the trapezoidal groove 14 along the axial direction of the sleeve 1 is A, the distance from the fixing block 5 to the trapezoidal groove 14 along the axial direction of the sleeve 1 is B, which satisfies B & gtA, the end surface of the sleeve 1 of the connecting unit is provided with a sealing ring 12, the end surface of the sleeve 1 of the other connecting unit is provided with an annular groove 13 matched with the sealing ring 12, the end surface of the sleeve 1 is also provided with an arc-shaped plate 8 and an arc-shaped groove I9, when the two sleeves move relatively, the arc-shaped groove I9 of the connecting unit is contacted with the arc-shaped plate 8 of the other connecting unit in a matching way, the trapezoidal groove 14 of the connecting unit is matched with the special-shaped lug 7 of the other connecting unit, the arc-shaped plate 8 is provided with a connecting block 10, the connecting block 10 is provided with a moving rod 17, the end part of the moving rod 17 is connected with an inward-bent limiting rod 15, and the limiting rod 15 is matched with a through hole 16, the limiting rod 15 is flexibly connected with the moving rod 17 through a torsion spring, and the gap between the limiting rod 15 and the moving rod 17 is larger than the inner diameter of the through hole 16.
The working principle of the invention is as follows:
when the sleeves 1 fixedly connected with the upper outer circumferential walls of the two hollow wall winding pipes are close to each other, the arc-shaped plates 8 can serve as a guide to enhance the alignment force, after the arc-shaped plates 8 are aligned with the corresponding arc-shaped recesses I, in the process of attaching the two sleeves 1, the limiting rods 15 on the arc-shaped plates 8 are extruded in the process of penetrating into the through holes 16, after the limiting rods 15 are extruded, the gaps between the limiting rods 15 and the moving rods 17 are reduced, so that the limiting rods 15 can smoothly pass through the through holes 16, the elastic force of the limiting rods 15 is restored after passing through the through holes 16, at the moment, the gaps between the limiting rods 15 and the moving rods 17 are restored to the initial state, after the moving rods 17 lose the thrust force, the limiting rods 15 move backwards, the gaps are larger than the inner diameters of the through holes 16, the gaps cannot move to fix the sleeves, and the fixing effect is enhanced;
when the arc plates 8 of the two pipe bodies are matched with the arc-shaped recess I, the guide rod 3 on the sleeve 1 approaches to the other special-shaped lug 7, the guide rod 3 is contacted with the inclined plane on one side of the special-shaped lug 7, the special-shaped lug 7 is subjected to certain extrusion force, the special-shaped lug 7 is driven to move downwards by the force which enables the compression spring 6 to generate downward deformation, the special-shaped lug 7 moves downwards to generate a gap for the guide rod 3 to move forwards, after the guide rod 3 continuously moves forwards, because the end part of the guide rod 3 is provided with the trapezoidal groove 14 matched with the shape of the special-shaped block, the trapezoidal groove 14 of the guide rod 3 is matched and clamped with the special-shaped lug 7, when the guide rod 3 shifts the special-shaped lug 7, the lower end of the special-shaped block is positioned in the fixed block 5, so that the guide rod is subjected to resistance and cannot move horizontally, and when water flow in a pipeline vibrates, the guide rod 3 is subjected to backward water flow thrust, at the moment, the guide rod 3 cannot move backwards due to being clamped with the special-shaped convex block 7, so that the clamping degree is higher than that between pipelines in the prior art; the trapezoidal groove 14 of the connecting unit at this moment is matched with the special-shaped convex block 7 of the other connecting unit, the arc-shaped plate 8 is also matched with the arc-shaped concave I, the sealing ring in the sleeve is also matched and extruded with the annular groove formed in the other sleeve to form a closed environment, so that sewage is prevented from leaking, and the problem that the labor and time are consumed due to repeated adjustment in the radial direction and the longitudinal direction during butt joint is solved.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (8)
1. The utility model provides a coupling assembling of cavity wall winding pipe in HDPE which characterized in that: comprises two connecting units which are connected with each other,
the connecting unit comprises a sleeve (1), a positioning block (2), a guide rod (3) and a fixing component, rectangular grooves (4) are symmetrically formed in the end face of the sleeve (1) respectively,
locating piece (2) with fixed subassembly is located rectangular channel (4), locating piece (2) be close to the one side of rectangular channel (4) mouth with guide bar (3) link to each other, the other end of guide bar (3) to rectangular channel (4) extend outward, trapezoidal groove (14) have been seted up on the tip that guide bar (3) outwards extend, coupling unit's guide bar (3) cooperate with another coupling unit's fixed subassembly and fix.
2. The connecting assembly of HDPE hollow wall wound pipe of claim 1, wherein: the fixing component comprises a fixing block (5) and a compression spring (6),
the fixed block (5) is internally provided with a blind hole, the compression spring (6) is connected with the bottom of the blind hole, and the other end of the compression spring (6) is connected with a special-shaped bump (7) matched with a trapezoidal groove (14) on the end part of the guide rod (3).
3. The connecting assembly of HDPE hollow wall wound pipe of claim 2, wherein: the lower end of the special-shaped bump (7) is arranged in the blind hole, and the upper end of the special-shaped bump (7) extends outwards.
4. The connecting assembly of HDPE hollow wall wound pipe of claim 3, wherein: the distance from the positioning block (2) to the trapezoidal groove (14) along the axial direction of the sleeve (1) is A, the distance from the fixing block (5) to the trapezoidal groove (14) along the axial direction of the sleeve (1) is B, and B & gtA is satisfied.
5. The connecting assembly of HDPE hollow wall wound pipe of claim 1, wherein: and a sealing ring (12) is arranged on the end face of the sleeve (1) of the connecting unit, and an annular groove (13) matched with the sealing ring (12) is arranged on the end face of the sleeve (1) of the other connecting unit.
6. A connecting assembly of HDPE hollow wall wound pipe according to any one of claims 1 to 5, wherein: the end surface of the sleeve (1) is also provided with an arc-shaped plate (8) and an arc-shaped groove I (9),
when the two sleeves move relatively, the arc-shaped groove I (9) of the connecting unit is in matched contact with the arc-shaped plate (8) of the other connecting unit, and the trapezoidal groove (14) of the connecting unit is matched with the special-shaped bump (7) of the other connecting unit.
7. The connecting assembly of HDPE hollow wall wound pipe of claim 6, wherein: be equipped with connecting block (10) on arc (8), be equipped with carriage release lever (17) on connecting block (10), the end connection of carriage release lever (17) has gag lever post (15), free end (15) of gag lever post (15) pass through the torsional spring with carriage release lever (17) are connected.
8. The connecting assembly of HDPE hollow wall wound pipe of claim 7, wherein: the vertical distance between the free end of the limiting rod (15) and the moving rod (17) is larger than the inner diameter of the through hole (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111085655.XA CN113738986B (en) | 2021-09-16 | 2021-09-16 | Coupling assembling of HDPE cavity wall winding pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111085655.XA CN113738986B (en) | 2021-09-16 | 2021-09-16 | Coupling assembling of HDPE cavity wall winding pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113738986A true CN113738986A (en) | 2021-12-03 |
| CN113738986B CN113738986B (en) | 2024-07-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111085655.XA Active CN113738986B (en) | 2021-09-16 | 2021-09-16 | Coupling assembling of HDPE cavity wall winding pipe |
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| CN (1) | CN113738986B (en) |
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