CN113738981B - Auxiliary device for connecting pipeline with inspection well - Google Patents
Auxiliary device for connecting pipeline with inspection well Download PDFInfo
- Publication number
- CN113738981B CN113738981B CN202111086200.XA CN202111086200A CN113738981B CN 113738981 B CN113738981 B CN 113738981B CN 202111086200 A CN202111086200 A CN 202111086200A CN 113738981 B CN113738981 B CN 113738981B
- Authority
- CN
- China
- Prior art keywords
- water stop
- stop ring
- pipe body
- wall
- well
- 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.)
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Links
- 238000007689 inspection Methods 0.000 title claims abstract description 23
- 238000007789 sealing Methods 0.000 claims abstract description 70
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 51
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 description 7
- 239000010865 sewage Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000013016 damping Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
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
- F16L41/00—Branching pipes; Joining pipes to walls
- F16L41/08—Joining pipes to walls or pipes, the joined pipe axis being perpendicular to the plane of the wall or to the axis of another pipe
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F5/00—Sewerage structures
- E03F5/02—Manhole shafts or other inspection chambers; Snow-filling openings; accessories
- E03F5/021—Connection of sewer pipes to manhole shaft
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Public Health (AREA)
- Water Supply & Treatment (AREA)
- Pipe Accessories (AREA)
Abstract
The invention discloses an auxiliary device for connecting a pipeline with an inspection well, which comprises a well body and a corrugated pipe body, wherein at least one connecting hole is formed in the well wall of the well body, the pipe body is positioned in the connecting hole, an expansion sealing water stop ring is arranged between the pipe body and the connecting hole, an annular groove is arranged on the expansion sealing water stop ring and is tightly clamped and sealed with the connecting hole, a notch is formed on the outer wall of a port of the expansion sealing water stop ring in the well body after the outer wall of the port of the expansion sealing water stop ring is bent towards the inner wall of the expansion sealing water stop ring, the notch is tightly clamped and attached with the end part of the pipe body, and a locking assembly for mutually locking the expansion sealing water stop ring is arranged on the pipe body, so that the problem that when water flows excessively, water flows to wash foreign matters to impact the pipeline to cause unstable connection between the pipeline and the inspection well is solved.
Description
Technical Field
The invention relates to the technical field of municipal construction, in particular to an auxiliary device for connecting a pipeline with an inspection well.
Background
In the municipal pipeline construction at present, the traditional pipeline and the inspection well are generally connected together through two methods, one method is to directly cast the pipeline and the inspection well together by using concrete, and the other method is to plug the connection part between the pipeline and the inspection well by using mortar, but the pipeline and the inspection well are difficult to combine together because the pipeline and the inspection well are different in material or are not cast at one time, so that the connection part between the pipeline and the inspection well is cracked, the connection part between the pipeline and the inspection well is not tightly sealed, leakage of different degrees can occur, sewage is leaked, or sewage is mixed into groundwater, environmental pollution is caused, or sewage treatment cost is increased.
In the prior art, a sealing gasket is placed between a pipeline and a well hole of an inspection well to be extruded and sealed so as to achieve the sealing effect, but foreign matters in sewage can collide with the pipeline in the flowing process of the pipeline, so that the pipeline can shake to a certain extent, and the sealing gasket is possibly loose due to excessive shaking times or excessive radian, and finally falls off.
Disclosure of Invention
The invention aims to provide an auxiliary device for connecting a pipeline with an inspection well, which is used for solving the problem that when water flows through a large scale, the water flow flushes foreign matters to strike the pipeline to cause unstable connection of the pipeline and the inspection well.
The invention is realized by the following technical scheme:
The utility model provides an auxiliary device that pipeline and inspection shaft are connected, includes the well body and is corrugated body, at least one connecting hole has been seted up on the wall of a well body's the wall of a well, the body is located in the connecting hole, the body with be equipped with the expansion seal water-stop ring between the connecting hole, be equipped with the ring channel on the expansion seal water-stop ring, the ring channel with connecting hole chucking is sealed the port outer wall of the internal expansion seal water-stop ring of well forms a breach after buckling to the inner wall of expansion seal water-stop ring, the breach with the tip chucking laminating of body, be equipped with on the body and be used for the locking component of expansion seal water-stop ring interlock.
In the prior art, a sealing gasket is placed between a pipeline and a well hole of an inspection well to be extruded and sealed so as to achieve the sealing effect, but foreign matters in sewage can collide with the pipeline in the flowing process of the pipeline, so that the pipeline can shake to a certain extent, and the sealing gasket is possibly loose due to excessive shaking times or excessive radian, and finally falls off.
According to the invention, the two symmetrical connecting holes are formed in the well body, and when the pipe body moves towards the connecting holes by entering the expansion sealing water stop ring until being matched and clamped with the notch in the expansion sealing water stop ring, the pipe body cannot move forwards continuously, if foreign matters strike the pipe body to move away from the well body, the pipe body cannot swing greatly and separate from the connection of the well body because the locking assembly is arranged to lock the position of the pipe body at the moment, and the problem that when water flows too much, the water flows scour the foreign matters to strike the pipe to cause unstable connection between the pipe and the inspection well is solved.
Further, an arc surface matched with the outer wall of the pipe body is arranged on the inner wall of the expansion sealing water stop ring at a part close to the connecting hole, the pipe body is impacted by water flow to wash foreign matters, so that the pipe body moves forwards or backwards.
Further, the locking assembly comprises a sealing ring, the sealing ring is located between adjacent wave crests of the pipe body, the expansion sealing water stop ring is provided with a plurality of blind holes at intervals on the end face far away from one end of the well body, the sealing ring is provided with a clamping component matched with the blind holes, when water flow drives foreign matters to wash out, the pipe body can swing due to the fact that the water flow is too large, and the pipe body can be limited to swing after being subjected to impact force through connection of the opened blind holes and the clamping component of the sealing ring.
Further, the clamping component comprises a guide rod, one end of the guide rod is connected with the sealing ring, the other end of the guide rod is connected with two inclined plugboards, free ends of the two inclined plugboards are connected with the guide rod through torsion springs, through holes penetrating through the expansion sealing water stop ring are symmetrically formed in the inner wall of the blind hole, the vertical distance from the end parts of the two inclined plugboards to the guide rod is larger than the inner diameter of the blind hole, if a certain mass of foreign matters in the pipe body flow along sewage, the amplitude is larger, and the connection mode of joggle joint or clamping is easy to loose.
Further, still include at least one fixed block, the fixed block is located on the outer wall of the well body, the sealing ring passes through telescopic spring and connects the fixed block, because the sealing ring receives the pulling force to well body oblique direction, has improved the fixed action, and has reduced the range of rocking to a greater extent.
Compared with the prior art, the invention has the following advantages and beneficial effects:
1. According to the invention, at least one connecting hole is formed in the well wall of the well body, the pipe body is positioned in the connecting hole, an expansion sealing water stop ring is arranged between the pipe body and the connecting hole, an annular groove is arranged on the expansion sealing water stop ring and is clamped and sealed with the connecting hole, a notch is formed in the outer wall of a port of the expansion sealing water stop ring in the well body after the outer wall of the port of the expansion sealing water stop ring is bent towards the inner wall of the expansion sealing water stop ring, the notch is clamped and attached with the end part of the pipe body, and a locking assembly for mutually locking the expansion sealing water stop ring is arranged on the pipe body. The problem of when rivers are big, the rivers wash the foreign matter and strike the pipeline and lead to pipeline and inspection shaft to be connected unstably is solved.
2. According to the invention, the cambered surface matched with the wave crest of the pipe body is arranged on the inner wall of the part close to the connecting hole, which is close to the expansion sealing water stop ring, so that the impact force of foreign matters on the pipe body can be utilized to increase the friction between the cambered surface and the pipe body, and the damping effect is achieved.
3. According to the invention, the locking assembly comprises the sealing ring, the sealing ring is positioned between adjacent wave crests of the pipe body, the expansion sealing water stop ring is provided with the blind holes at intervals on the end face far away from one end of the well body, and the sealing ring is provided with the clamping component matched with the blind holes, so that the shaking amplitude of the pipe body after being subjected to impact force can be limited.
Drawings
The accompanying drawings, which are included to provide a further understanding of embodiments of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the principles of the application. In the drawings:
FIG. 1 is a schematic view of the internal structure of the present invention;
FIG. 2 is an enlarged schematic view of the structure A of the present invention;
Fig. 3 is a front view of the present invention.
In the drawings, the reference numerals and corresponding part names:
The device comprises a 1-well body, a 2-well wall, a 3-pipe body, a 4-cambered surface, a 5-expansion sealing water stop ring, a 6-annular groove, a 7-notch, an 8-telescopic spring, a 9-sealing ring, a 10-wave crest, an 11-guide rod, a 12-inclined inserting plate, a 13-through hole and a 14-fixed block.
Detailed Description
For the purpose of making apparent the objects, technical solutions and advantages of the present invention, the present invention will be further described in detail with reference to the following examples and the accompanying drawings, wherein the exemplary embodiments of the present invention and the descriptions thereof are for illustrating the present invention only and are not to be construed as limiting the present invention.
Example 1:
As shown in fig. 1 to 3, an auxiliary device for connecting a pipeline and an inspection well comprises a well body 1 and a corrugated pipe body 3, wherein at least one connecting hole is formed in a well wall 2 of the well body 1, the pipe body 3 is positioned in the connecting hole, an expansion sealing water stop ring 5 is arranged between the pipe body 3 and the connecting hole, an annular groove 6 is arranged on the expansion sealing water stop ring 5, the annular groove 6 is tightly clamped and sealed with the connecting hole, a notch 7 is formed after the outer wall of a port of the expansion sealing water stop ring 5 in the well body 1 is bent towards the inner wall of the expansion sealing water stop ring 5, the notch 7 is tightly clamped and attached with the end part of the pipe body 3, a locking component for mutually locking the expansion sealing water stop ring 5 is arranged on the pipe body 3, an arc surface 4 matched with the outer wall of the pipe body 3 is arranged on the inner wall of the expansion sealing water stop ring 5, the locking component comprises a sealing ring 9, the sealing ring 9 is located between the adjacent wave crests 10 of the pipe body 3, the expansion sealing water stop ring 5 is provided with a plurality of blind holes at intervals on the end face far away from one end of the well body 1, the sealing ring 9 is provided with clamping components matched with the blind holes, each clamping component comprises a guide rod 11, one end of each guide rod 11 is connected with the sealing ring 9, the other end of each guide rod 11 is connected with two inclined inserting plates 12, free ends of the two inclined inserting plates 12 are connected with the guide rods 11 through torsion springs, through holes 13 penetrating through the expansion sealing water stop ring 5 are symmetrically formed in the inner walls of the blind holes, the vertical distance from the end parts of the two inclined inserting plates 12 to the guide rods 11 is larger than the inner diameter of the blind holes, the expansion sealing water stop ring further comprises at least one fixing block 14, the fixing block 14 is located on the outer wall of the well body, and the sealing ring 9 is connected with the fixing block 14 through the expansion springs 8.
The working principle of the invention is as follows:
two symmetrical connecting holes are formed in the well body, the pipe body moves towards the connecting holes by entering the expansion sealing water stop ring, and the pipe body is matched and clamped with a notch in the expansion sealing water stop ring in the moving process to stop the pipe body from moving forwards;
when sewage is discharged, the expansion sealing water stop ring begins to expand gradually after touching water until the cambered surface of the expansion sealing water stop ring extrudes to the pipe body, gaps among wave crests of the pipe body are filled, the pipe body is in a clamping state at the moment, the impact force of foreign matters on the pipe body can increase friction between the cambered surface and the pipe body, and the pipe body can play a role in damping no matter moving forwards or backwards;
The guide rod inserts in to the blind hole, the in-process in entering the blind hole, the inclined flashboard of guide rod produces deformation owing to receiving the extrusion of blind hole, the tip of two inclined flashboard and the vertical distance of guide rod diminish this moment, in the through-hole of seting up on the inner wall of blind hole is removed to, two inclined flashboard all move to the direction of two through-holes, until inclined flashboard extends to the through-hole direction and resumes elasticity, inclined flashboard and inflation sealing water-stop ring realize the chucking this moment, can bear rocking by a relatively big margin, and can not make the body break away from the connection, and the sealing ring passes through extension spring and connects the fixed block, received the pulling force to the oblique direction of well body, the fixed action has been improved, and the amplitude of rocking has been reduced to a greater extent.
The foregoing description of the embodiments has been provided for the purpose of illustrating the general principles of the invention, and is not meant to limit the scope of the invention, but to limit the invention to the particular embodiments, and any modifications, equivalents, improvements, etc. that fall within the spirit and principles of the invention are intended to be included within the scope of the invention.
Claims (3)
1. The utility model provides an auxiliary device that pipeline and inspection shaft are connected, includes well body (1) and is corrugated body (3), its characterized in that:
At least one connecting hole is formed in a well wall (2) of the well body (1), the pipe body (3) is positioned in the connecting hole, an expansion sealing water stop ring (5) is arranged between the pipe body (3) and the connecting hole, an annular groove (6) is formed in the expansion sealing water stop ring (5), the annular groove (6) is tightly clamped and sealed with the connecting hole,
A notch (7) is formed in the well body (1) after the outer wall of the port of the expansion sealing water stop ring (5) is bent towards the inner wall of the expansion sealing water stop ring, the notch (7) is tightly clamped and attached with the end part of the pipe body (3), and a locking assembly for mutually locking the expansion sealing water stop ring (5) is arranged on the pipe body (3);
The locking assembly comprises a sealing ring (9), wherein the sealing ring (9) is positioned between adjacent wave crests (10) of the pipe body (3), a plurality of blind holes are formed in the end face, far away from one end of the well body (1), of the expansion sealing water stop ring (5) at intervals, and clamping components matched with the blind holes are arranged on the sealing ring (9);
The clamping component comprises a guide rod (11), one end of the guide rod (11) is connected with the sealing ring (9), the other end of the guide rod (11) is connected with two inclined inserting plates (12), and the free ends of the two inclined inserting plates (12) are connected with the guide rod (11) through torsion springs;
The well body is characterized by further comprising at least one fixed block (14), wherein the fixed block (14) is positioned on the outer wall of the well body, and the sealing ring (9) is connected with the fixed block (14) through a telescopic spring (8).
2. An auxiliary device for connecting a pipeline to an inspection well according to claim 1, wherein: an arc surface (4) matched with the outer wall of the pipe body (3) is arranged on the inner wall of the expansion sealing water stop ring (5).
3. An auxiliary device for connecting a pipeline to an inspection well according to claim 1, wherein: through holes (13) penetrating through the expansion sealing water stop ring (5) are symmetrically formed in the inner wall of the blind hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111086200.XA CN113738981B (en) | 2021-09-16 | 2021-09-16 | Auxiliary device for connecting pipeline with inspection well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111086200.XA CN113738981B (en) | 2021-09-16 | 2021-09-16 | Auxiliary device for connecting pipeline with inspection well |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113738981A CN113738981A (en) | 2021-12-03 |
| CN113738981B true CN113738981B (en) | 2024-06-28 |
Family
ID=78739301
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111086200.XA Active CN113738981B (en) | 2021-09-16 | 2021-09-16 | Auxiliary device for connecting pipeline with inspection well |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113738981B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114737611B (en) * | 2022-05-10 | 2024-02-27 | 威海天泽建筑材料有限公司 | Building-free inspection well device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008101671A (en) * | 2006-10-18 | 2008-05-01 | Totaku Industries Inc | Water-tight pipe joint |
| CN102278557A (en) * | 2011-05-18 | 2011-12-14 | 张家港市亿利机械有限公司 | Connecting structure of plastic inspection well and corrugated pipe |
| CN109780350A (en) * | 2019-03-27 | 2019-05-21 | 陆挚译 | A kind of liquid anti-leak pipe flange |
| CN215928779U (en) * | 2021-09-16 | 2022-03-01 | 中国五冶集团有限公司 | Auxiliary device for connecting pipeline and inspection well |
Family Cites Families (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3841330A1 (en) * | 1988-12-08 | 1990-06-13 | Muecher Hermann Gmbh | Elastic sealing ring for a plug-in connection designed as a sliding ring seal |
| JPH10220645A (en) * | 1997-02-12 | 1998-08-21 | Nkk Corp | Piping structure around construction |
| JP3658335B2 (en) * | 2001-04-09 | 2005-06-08 | 象印マホービン株式会社 | Air pot |
| JP2002332651A (en) * | 2001-05-08 | 2002-11-22 | Nippon Zenith Pipe Co Ltd | Earthquake-resistant flexible joint between manhole and conduit line material |
| CN104196108B (en) * | 2014-09-15 | 2015-12-30 | 嘉兴汇昌塑业有限公司 | The servicing unit that a kind of pipeline is connected with manhole well seat |
| CN206647667U (en) * | 2016-12-30 | 2017-11-17 | 河北旺源管业有限公司 | A kind of heavy caliber HDPE structural walls quickly connect inspection shaft |
| CN106838525A (en) * | 2017-04-17 | 2017-06-13 | 秦朝东 | Quick change swelling pipeline attachment structure |
| CN206802481U (en) * | 2017-06-21 | 2017-12-26 | 中国五冶集团有限公司 | A kind of large-scale drainage pipeline door shaped stent |
| CN209054163U (en) * | 2018-08-08 | 2019-07-02 | 辽宁博道建材科技有限公司 | A kind of PE pipe for pipeline push pipe |
| CN109519619A (en) * | 2018-11-27 | 2019-03-26 | 河南美丽乡村环保科技有限公司 | A kind of sealing mechanism of the defeated universal pipes docking of biogas |
| CN109780347B (en) * | 2019-03-16 | 2020-10-30 | 华博管业有限公司 | Chemical pipeline antiseep flange |
| CN110360338A (en) * | 2019-07-11 | 2019-10-22 | 刘昱熙 | A kind of two-way liquid-discharging means of bottle of single valve |
| CN211203146U (en) * | 2019-11-22 | 2020-08-07 | 江苏中森建筑设计有限公司 | Drainage pipeline and inspection well connection water stop structure |
| CN213233724U (en) * | 2020-07-21 | 2021-05-18 | 海南经典环保工程有限公司 | From rural sewage collection inspection shaft of taking grid |
| CN112610759B (en) * | 2020-12-14 | 2022-06-24 | 湖北卓腾机电有限公司 | Sealing ring and connecting piece for pipeline reducing connection and use method |
-
2021
- 2021-09-16 CN CN202111086200.XA patent/CN113738981B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008101671A (en) * | 2006-10-18 | 2008-05-01 | Totaku Industries Inc | Water-tight pipe joint |
| CN102278557A (en) * | 2011-05-18 | 2011-12-14 | 张家港市亿利机械有限公司 | Connecting structure of plastic inspection well and corrugated pipe |
| CN109780350A (en) * | 2019-03-27 | 2019-05-21 | 陆挚译 | A kind of liquid anti-leak pipe flange |
| CN215928779U (en) * | 2021-09-16 | 2022-03-01 | 中国五冶集团有限公司 | Auxiliary device for connecting pipeline and inspection well |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113738981A (en) | 2021-12-03 |
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