CN205978966U - Interim shutoff end cap of underground piping - Google Patents
Interim shutoff end cap of underground piping Download PDFInfo
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- CN205978966U CN205978966U CN201620756618.5U CN201620756618U CN205978966U CN 205978966 U CN205978966 U CN 205978966U CN 201620756618 U CN201620756618 U CN 201620756618U CN 205978966 U CN205978966 U CN 205978966U
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- plug
- underground piping
- end cap
- adhesive segment
- temporary plugging
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Abstract
The utility model relates to an interim shutoff of the underground piping method of blocking up, bonding part including integrated into one piece divides and the end cap main part, wherein, bonding part divide into the internal diameter phase -match of ring -type, its external diameter and underground piping for bond mutually with secret pipe inner wall, the end cap main part is the hollow semicircle body, and its internal diameter and external diameter that divides the cross section is connected with bonding part respectively with the internal diameter and the external diameter unanimity of bonding part branch, bonding part divides and the end cap main part all adopts carbon fiber cloth layer to make. The utility model provides an interim shutoff end cap of underground piping, make full use of carbon fiber material quality light, tensile strength is high, with the characteristics that concrete -based face bond property is excellent, adopt casing that carbon fiber sheet formed as interim end cap, can bear the interior water pressure of major diameter underground piping between the turn(a)round, make the interim end cap of preparation, bear big, the structure is light and handy, convenient, the convenient to detach of construction, relatively is fit for the interim maintenance of major diameter underground piping.
Description
Technical field
The utility model is related to hydraulic engineering technical field and in particular to a kind of underground piping temporary plugging plug.
Background technology
Through data check and investigation, adopting inflated rubber plug the underground piping temporary plugging of current home and abroad, in Nei Shui more
Within pressure 0.2MPa, plug maximum gauge is up to 3.0m.As internal water pressure brings up to 0.5MPa, current rubber plug skill
The pipeline that art can only be less than 1.5m to caliber carries out temporary plugging.For with diameter greater than 3.0m, bear the interim of internal pressure 0.5MPa
Plug, no mature technology provides a reference both at home and abroad.
Utility model content
For solving the deficiencies in the prior art, provide a kind of temporary plugging plug being applied to large diameter underground, this reality
Provide a kind of underground piping temporary plugging plug with new, including integrally formed adhesive segment and plug main body, wherein,
Described adhesive segment is ring-type, and its external diameter matched with the internal diameter of underground piping, for underground piping inwall phase
Bonding；
Described plug main body is the semicircular body of hollow, and its internal diameter of cross section of being connected with adhesive segment and external diameter are distinguished
Consistent with the internal diameter of adhesive segment and external diameter；
Described adhesive segment and plug main body are all made using carbon fibre cloth layer.
Wherein, in aforementioned adhesive segment and plug main body, the number of plies of the carbon fibre cloth layer of setting is set to more than one layer.
Wherein, in aforementioned adhesive segment and plug main body, the number of plies of the carbon fibre cloth layer of setting is set to three layers.
Wherein, aforementioned adhesive segment and the concrete surface of underground piping are bondd by binding agent, the material of described binding agent
Matter is epoxy resin.
Wherein, aforementioned carbon fibre cloth layer is formed by the coating of two-way carbon cloth.
Wherein, the inner surface of aforementioned adhesive segment and plug main body is coated with polyurea coating.
Wherein, the thickness of aforementioned polyurea coating is not less than 3mm.
Wherein, aforementioned polyurea coating is one-component polyurea coating.
The underground piping temporary plugging plug that the utility model provides, takes full advantage of carbon fibre material light weight, tension
Intensity is high, with the excellent feature of concrete surface adhesive property, the housing being formed using carbon fiber plate is as interim plug, energy
Bear the interior hydraulic pressure during large diameter underground maintenance；Make the interim plug of preparation, carry big, light structure, construction convenient,
Easy to disassemble, relatively it is suitable for the ad hoc inspection and repair of large diameter underground.
Brief description
Fig. 1：Perspective view of the present utility model；
Fig. 2：The utility model sectional view.
Specific embodiment
Further understand to have to the technical solution of the utility model and beneficial effect, cooperation accompanying drawing is detailed below
The beneficial effect of the technical solution of the utility model and its generation is described.
Fig. 1 is perspective view of the present utility model, and Fig. 2 is sectional view of the present utility model, as Fig. 1-Fig. 2 institute
Show, the underground piping temporary plugging plug that the utility model provides, including integrally formed adhesive segment 1 and plug main body 2, its
In,
Described adhesive segment 1 is ring-type, and its external diameter matched with the internal diameter of underground piping 3, for underground piping 3 inwall
Bonding, adhesive segment 1 length is preferably set to more than 1 meter, to realize the stable bonding with underground piping 3；
Described plug main body 2 is the semicircular body of hollow, and its internal diameter of cross section of being connected with adhesive segment 1 and external diameter are divided
Not consistent with the internal diameter of adhesive segment 1 and external diameter；
Described adhesive segment 1 and plug main body 2 are all made using carbon fibre cloth layer.
In the utility model, because described adhesive segment 1 and plug main body 2 are all made using carbon fibre cloth layer, it can fill
Divide and utilize carbon fibre material light weight, tensile strength high, with the excellent feature of concrete surface adhesive property, using carbon fiber sheet
The housing that material is formed can bear the interior hydraulic pressure during large diameter underground maintenance as interim plug, makes temporarily blocking up of preparation
Head, carries big, light structure, convenient, easy to disassemble, the ad hoc inspection and repair of relatively more suitable large diameter underground of constructing.
Preferably, in described adhesive segment 1 and plug main body 2, the number of plies of the carbon fibre cloth layer of setting is set to more than one layer.
In the case of interior hydraulic pressure and coefficient of friction identical, the number of plies is more, and the thickness of plug is thicker, and plug same position is in phase Tongfang
Shift value upwards is less, and structure is also more stable, more can guarantee that construction safety, preferably, described adhesive segment 1 and plug main body
On 2, the number of plies of the carbon fibre cloth layer of setting is set to three layers.
Preferably, described adhesive segment 1 and the concrete surface of underground piping 3 are bondd by binding agent, described binding agent
Material be epoxy resin；
Specifically, binding agent includes impregnation and the primary coat glue being configured with it and repair sheets, and the key property of binding agent is such as
Shown in table 1, by arranging this binding agent so that adhesive segment 1 is not less than with the adhesion strength of the concrete surface of underground piping 3
2.0MPa.
The Essential Performance Requirements of table 1 binding agent
Preferably, described carbon fibre cloth layer is formed by the coating of two-way carbon cloth.
Preferably, the inner surface of described adhesive segment 1 and plug main body 2 is coated with polyurea coating 4.
In the utility model, so-called inner surface refers to, in contrast to adhesive segment 1 and plug main body 2 and concrete inner wall
The one side connecting.
The property of the excellent barrier performance of polyurea coating 4 and high elongation determines it and is coated in carbon cloth surface
When, plug leak can be prevented as the impervious body of plug.
Preferably, described polyurea coating 4 is one-component polyurea coating.
Single-component polyurea material is a class response type, the coating products of solvent-free pollution, and it is by the height containing polyisocyanates
Molecule performed polymer is mixed with the polyamine (inclusion amino-polyether) through end-blocking, and adds other functions auxiliary agent to be formed.No
Under water state, stable system, once opening bucket construction, in atmosphere in the presence of moisture, produce rapidly polyamine, polyamine is rapid
React with isocyanates, form class coating material.
Specifically, the key property of one-component polyureas is as shown in table 2.
Table 2 one-component polyureas key property
By providing above-mentioned polyureas, described carbon fibre cloth layer and the adhesion strength of polyurea coating can be made to be not less than 2.0MPa.
Preferably, the thickness of polyurea coating 4 is not less than 3mm.
The utility model is additionally provided with a kind of underground piping temporary plugging plug, is made by following preparation methods：
S1：Make closure plug model；
S2：In closure plug model surface blade coating binding resin；
S3：Paste carbon cloth on binding resin surface, form carbon fibre cloth layer；
S4：Roll carbon fibre cloth layer, crowded bubble removing along machine direction, make binding resin composition penetrate into carbon fibre cloth layer；
S5：Scratch immediately after being dried Deng binding resin and paste next layer of binding resin and carbon fibre cloth layer；
S6：Carbon fibre cloth layer is pasted after finishing, and uniformly scratches binding agent, described bonding on last layer of carbon fibre cloth layer
The material of agent is epoxy resin；
S7：It is molded latter 28 days in carbon cloth, remove plug sealing and plugging model.
Preferably, described carbon fibre cloth layer pastes altogether three layers of coating.
Preferably, in described step S3 and step S5, the carbon cloth pasted is two-way carbon cloth.
Preferably, also comprise the steps：
S7：In closure plug inner surface brushing polyurea coating.
Preferably, described polyurea coating is one-component polyurea coating.
When being embodied as, need in carbon fibre cloth layer external coating polyureas moist-type interfacial agents, treat that interfacial agents finger touches
Touch in brushing one-component polyurea coating when being dried.
Preferably, the thickness of described polyurea coating is not less than 3mm, therefore generally requires brushing four times about, every layer of brushing
Interval cannot be greater than three hours.
After sticking carbon fiber sheet material brushing polyurea coating, natural curing reaches initial cure in 24 hours, should ensure that solidification
Period is interference-free.Carbon fiber sheet reaches the time of natural curing needed for design strength after pasting：Daily mean temperature 10 DEG C with
It will be 10 days about when lower；It is 3～7 days when daily mean temperature is more than 10 DEG C.The interim plug of carbon fiber should be prevented during this period to be subject to
To rigid impact.
In the specific implementation, so-called carbon fibre cloth layer is to be formed by carbon fiber composite reinforced material to the utility model, carbon
The composite that fibrous composite is formed after referring to carbon cloth glue dipping.
For further appreciating that the beneficial effects of the utility model, below in conjunction with specific model parameter to the utility model
The closure plug providing, its applicable pipeline environment (diameter, interior hydraulic pressure etc.) of institute and performance (shift value, stress distribution etc.)
It is described further.
First, geometric parameter and parameters of loading set
Concrete duct actual lining cutting internal diameter is 4.6m, and lining thickness is 40cm.The a diameter of 4.6m of plug.One layer of carbon fiber
The thickness of layer of cloth is 0.5mm, and the thickness of two-layer carbon fibre cloth layer is 1.0mm, and the thickness of three layers of carbon fibre cloth layer is 1.5mm.
Carbon fibre composite is to intend pressing 1m calculating with the length of concrete binding, and coefficient of friction is initially set to 0.5, rubs
Change the value of coefficient of friction when wiping coefficient susceptibility analysis.
Load is uniformly interior hydraulic pressure, and size is 0.5MPa.
2nd, technology path general introduction
1st, underground piping temporary plugging plug (hereinafter referred " CFRP plug ") concrete duct FEM model
Set up and comprise concrete duct, the three-dimensional finite element model of CFRP hemispherical plug.Wherein, hemispherical plug adopts
Can be simulated with the quadrangle three dimensional membrane element of the reflection planes components of stress, pipeline coagulation soil adopts space 8 node hexahedron entity
Unit simulation, and the contact portion of plug and concrete, by specifying target face and contact surface, generates the mode mould of osculating element
Intend bonding-longitudinal slip effect.Wherein, CFRP plug material thickness, load, friction is should be taken into account when setting up FEM model
The change of coefficient, to carry out sensitivity analysis.
2nd, mechanics of materials law theory calculates
For the ease of carrying out contrast verification with Finite element analysis results, using the mechanical model simplifying, closure plug is subject to
Power, bond length etc. carry out preliminary theory and calculate analysis.The stopper structure being calculated under given water pressure is non-destructive
Minimum bond length, CFRP plug section maximum stress etc..
3rd, the simulation of CFRP plug and nonlinear behavior of concrete bonding-sliding
Under extraneous effect of water pressure, CFRP plug is a complicated contact non-thread with the bonded contact of peripheral concrete
Sex chromosome mosaicism, including material nonlinearity and contact nonlinear.Linear and elastic finite element be then difficult to be reflected in load action lower end cap with
The STRESS VARIATION of concrete binding effect and sliding scope.The mechanical behavior of bonded contact between for more real modeling interface,
Using the contact analysis function of multiple cell types, material constitutive model and the ANSYS including in ANSYS, realize CFRP and block up
Head and the numerical simulation of nonlinear behavior of concrete bonding-slippage.On the interface of CFRP plug and concrete, insertion interface is single
Unit, using surface-to-surface contact elements, CFRP plug contact surface is taken as target face, using Targe170 unit simulation；Concrete
Surface is taken as contact surface, using Contact174 unit simulation, and arranges real constant and keyword to osculating element.
Computation model adopts Descartes's rectangular coordinate system, and its x-axis is horizontal direction, and vertical with conduit axis direction, y-axis is
Horizontal direction, points to plug along conduit axis, and z-axis is vertical, upwards for just；Coordinate origin is taken at hemispherical plug
At the centre of sphere.
3rd, CFRP plug three-dimensional non-linear finite element Calculation results
1st, under uniform effect of water pressure, one layer of CFRP entirety plug is maximum along pipeline axial displacement, i.e. CFRP plug
End has maximum displacement, is 40.884mm.
2nd, CFRP entirety stopper structure stress is maximum in CFRP bonding with non-stick junction interface, and this region is that material is the most fragile
Error area, axial maximum stress is 1260MPa.
3rd, the shear stress at plug and concrete surface bonded contact interface meets friction coulomb model, in adhesive aggregation force parameter
=0.5MPa, coefficient of friction is taken as under 0.5 design conditions, and the maximum skidding distance at interface is 9.774mm.Slip region is sent out
Life is in adhesive section end.
4th, the sensitiveness Calculation results of plug material thickness
1st, two-layer and three layers of CFPR stopper structure hydraulic pressure P=0.5MPa, coefficientoffrictionμ=0.5 design conditions in given
Under, compared to x direction and z direction, the shift value on (pipeline is axially) is maximum along the y-axis direction for stopper structure, and three layers of CFPR
The maximum displacement value of stopper structure is less than the shift value of two-layer CFPR plug.
2nd, hydraulic pressure P=0.5MPa in given, under the design conditions of coefficientoffrictionμ=0.5, two-layer and three layers of CFPR plug are tied
The stress value that structure is gone up along the y-axis direction is maximum, and maximum stress value is respectively less than CFPR plug material tensile strength 715MPa of itself, full
The sufficient strength of materials requires.
3rd, according to data analysis, under identical load, boundary condition, the maximum stress value of two-layer CFPR plug is approximately one layer
The half of CFPR plug maximum stress value, the maximum stress value of three layers of CFPR plug is approximately one layer of CFPR plug maximum stress value
1/3rd.
4th, under identical load, boundary condition, the friction stree at two-layer and three layers of CFPR stopper structure bonded contact interface
All reach interface magnitude of maximum shearing stress, with the increase of plug material thickness, plug bonded contact interface maximum skidding distance subtracts
Little.Therefore, the safety stock using three layers of CFPR stopper structure is higher, the more difficult destruction of stopper structure.
All things considered, during using three layers of CFPR stopper structure, can ensure the safety of stopper structure, Er Qieyou from intensity
A certain degree of affluence, that is, in terms of intensity, three layers of CFPR stopper structure have higher bearing capacity, and large diameter underground is faced
When plugging structure there is enough securities.
5th, the sensitiveness Calculation results of coefficient of friction
1st, under identical load action, the maximum displacement changing to CFPR stopper structure x direction, z direction of coefficient of friction
Value impact less, has an impact to the maximum displacement value on y direction.With the increase of coefficient of friction, stopper structure is in y-direction
Maximum displacement value reduces.
2nd, under equal loading condition and boundary condition, the maximum stress changing to hemispherical stopper structure of coefficient of friction
Value is almost without impact.
3rd, coefficient of friction has a certain impact to the maximum stress value of CFPR stopper structure bonded contact section, with coefficient of friction
Increase, on x, y, z direction, CFPR contact-segment maximum stress value all has corresponding reduction.
4th, under identical loading condition and boundary condition, the maximum skidding distance at plug bonded contact interface is with coefficient of friction
Increase and reduce, and stopper structure contact interface friction stree all reaches maximum friction stress value.
On the whole, coefficient of friction is little on the impact of stopper structure bearing capacity, the maximum sliding to bonded contact interface
Distance has certain impact, and coefficient of friction is bigger, and major diameter stopper structure is being less susceptible to occur with concrete binding contact interface
Sliding rupture.
6th, FEM calculation Analysis of conclusion
1st, under uniform effect of water pressure, CFPR entirety stopper structure end displacement amount is maximum.Coefficient of friction value is
0.5, the maximum displacement of a layer, two-layer and three layers of CFPR stopper structure is respectively：40.884mm、22.96mm、17.274mm.Can
To find out, the thickness of plug material is bigger, and CFPR stopper structure end displacement amount is less.
2nd, CFPR stopper structure has maximum stress along y-axis forward direction (conduit axis direction), one layer, two-layer and three layers of CFPR
The axial maximum stress of stopper structure is respectively：1260MPa、692MPa、497MPa.The axial maximum stress of CFPR stopper structure
Reduce with the increase of material thickness.And CFPR entirety stopper structure maximum stress occurs in CFPR bonding and non-adherent interface
Place, this region is the easiest tensile failure region of material.
3rd, the tensile strength of the CFPR (carbon fibre composite) being provided from design side is 715MPa, in given load
Under effect, one layer of CFPR plug material of itself can exceed elastic range, and CFPR structure damages；Two-layer and three layers of plug knot
Structure all can meet the strength of materials, and has higher bearing capacity using three layers of CFPR stopper structure, to large diameter underground
Temporary plugging structure has more enough securities.
4th, under identical load, boundary condition, the maximum skidding distance of one layer of CFPR stopper structure is maximum, is 9.774mm；
The maximum skidding distance of two-layer CFPR stopper structure takes second place, and is 8.1mm；The maximum skidding distance of three layers of CFPR stopper structure is
Little, it is 7.53mm.The friction stree at one layer, two-layer and three layers of CFPR stopper structure bonded contact interface all reaches interface maximum and cuts
Stress value 1.75MPa.With the increase of plug material thickness, plug bonded contact interface maximum skidding distance reduces, and CFPR blocks up
Head and concrete surface bonded contact position are less susceptible to sliding rupture.
5th, pass through coefficient of friction sensitivity analysis, stopper structure coefficient of friction is 0.3,0.5,0.7 maximum displacement
It is 20.55mm, 17.273mm, 15.706mm respectively, CFPR stopper structure maximum stress is respectively：505MPa、497MPa、
501MPa.As can be seen that coefficient of friction is on the impact of stopper structure bearing capacity less, but the maximum sliding at bonded contact interface away from
Defection is affected by coefficient of friction, and coefficient of friction is bigger, stopper structure with concrete binding contact interface maximum sliding away from
From shorter, stopper structure safety stock degree is higher.
Therefore, the combination model data that draws of analysis is it is known that the underground piping temporary plugging plug that provides of the utility model,
Tool has the advantage that：
1st, adopt carbon fibre material as material of main part, can make full use of carbon fibre material light weight, tensile strength high, with
The excellent feature of concrete surface adhesive property, the housing being formed using carbon fiber plate, as interim plug, can bear straight greatly
Interior hydraulic pressure during the maintenance of footpath underground piping, makes the interim plug of preparation, carries big, light structure, construction is convenient, be easy to tear open
Unload, be relatively suitable for the ad hoc inspection and repair of large diameter underground.
2nd, make use of the property of the excellent barrier performance of polyurea coating and high elongation, the plug leakage making can be prevented
Water.
3rd, closure plug includes three layers of carbon fibre cloth layer so as to structure has higher bearing capacity, to major diameter ground
Lower pipeline carries out during temporary plugging it is ensured that enough securities, and has certain affluence, in the pipe of concrete for 4.6m for the internal diameter
The interior hydraulic pressure of 0.5MPa in road, can be born, that is, solving, prior art is insurmountable to be more than 3.0m in pipe diameter, and
Interior hydraulic pressure reaches blocking technology during 0.5MPa.
Although the utility model is illustrated using above-mentioned preferred embodiment, so it is not limited to the utility model
Protection domain, any those skilled in the art within without departing from spirit and scope of the present utility model, relatively above-mentioned enforcement
Example carries out various variation and still belongs to, with modification, the scope that the utility model is protected, and protection domain therefore of the present utility model is with right
What claim was defined is defined.
Claims (8)
1. a kind of underground piping temporary plugging plug is it is characterised in that include integrally formed adhesive segment and plug main body, its
In,
Described adhesive segment is ring-type, and its external diameter is matched with the internal diameter of underground piping, for bonding with underground piping inwall；
Described plug main body is the semicircular body of hollow, and its internal diameter of cross section of being connected with adhesive segment and external diameter respectively with glue
The internal diameter that knot is divided is consistent with external diameter；
Described adhesive segment and plug main body are all made using carbon fibre cloth layer.
2. underground piping temporary plugging plug as claimed in claim 1 it is characterised in that：Described adhesive segment and plug main body
The number of plies of the carbon fibre cloth layer of upper setting is set to more than one layer.
3. underground piping temporary plugging plug as claimed in claim 2 it is characterised in that：Described adhesive segment and plug main body
The number of plies of the carbon fibre cloth layer of upper setting is set to three layers.
4. underground piping temporary plugging plug as claimed in claim 1 it is characterised in that：Described adhesive segment and underground piping
Concrete surface bondd by binding agent, the material of described binding agent is epoxy resin.
5. the underground piping temporary plugging plug as any one of claim 1-4 it is characterised in that：Described carbon cloth
Layer is formed by the coating of two-way carbon cloth.
6. underground piping temporary plugging plug as claimed in claim 1 it is characterised in that：Described adhesive segment and plug main body
Inner surface be coated with polyurea coating.
7. underground piping temporary plugging plug as claimed in claim 6 it is characterised in that：The thickness of described polyurea coating is not little
In 3mm.
8. underground piping temporary plugging plug as claimed in claim 6 it is characterised in that：Described polyurea coating gathers for one-component
Urea coating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620756618.5U CN205978966U (en) | 2016-07-18 | 2016-07-18 | Interim shutoff end cap of underground piping |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620756618.5U CN205978966U (en) | 2016-07-18 | 2016-07-18 | Interim shutoff end cap of underground piping |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205978966U true CN205978966U (en) | 2017-02-22 |
Family
ID=58025963
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620756618.5U Active CN205978966U (en) | 2016-07-18 | 2016-07-18 | Interim shutoff end cap of underground piping |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205978966U (en) |
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2016
- 2016-07-18 CN CN201620756618.5U patent/CN205978966U/en active Active
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