CN117823737A - Unsaturated polyester resin pipe joint and production process thereof - Google Patents
Unsaturated polyester resin pipe joint and production process thereof Download PDFInfo
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- CN117823737A CN117823737A CN202410236082.3A CN202410236082A CN117823737A CN 117823737 A CN117823737 A CN 117823737A CN 202410236082 A CN202410236082 A CN 202410236082A CN 117823737 A CN117823737 A CN 117823737A
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- pipe joint
- polyester resin
- unsaturated polyester
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- 229920006337 unsaturated polyester resin Polymers 0.000 title claims abstract description 32
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 10
- 238000007789 sealing Methods 0.000 claims abstract description 155
- 229920005989 resin Polymers 0.000 claims abstract description 85
- 239000011347 resin Substances 0.000 claims abstract description 85
- 239000002184 metal Substances 0.000 claims abstract description 44
- 229910052751 metal Inorganic materials 0.000 claims abstract description 44
- 239000002775 capsule Substances 0.000 claims abstract description 35
- 239000012188 paraffin wax Substances 0.000 claims abstract description 31
- 238000002844 melting Methods 0.000 claims abstract description 18
- 230000008018 melting Effects 0.000 claims abstract description 16
- 238000001125 extrusion Methods 0.000 claims description 27
- 239000012943 hotmelt Substances 0.000 claims description 12
- 238000006116 polymerization reaction Methods 0.000 claims description 12
- 238000003825 pressing Methods 0.000 claims description 12
- 239000000155 melt Substances 0.000 claims description 11
- 238000001746 injection moulding Methods 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 9
- 230000008569 process Effects 0.000 claims description 9
- 239000002994 raw material Substances 0.000 claims description 9
- 238000000926 separation method Methods 0.000 claims description 9
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims description 6
- 150000008064 anhydrides Chemical class 0.000 claims description 6
- WPYMKLBDIGXBTP-UHFFFAOYSA-N benzoic acid Chemical compound OC(=O)C1=CC=CC=C1 WPYMKLBDIGXBTP-UHFFFAOYSA-N 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 claims description 6
- QQVIHTHCMHWDBS-UHFFFAOYSA-N isophthalic acid Chemical compound OC(=O)C1=CC=CC(C(O)=O)=C1 QQVIHTHCMHWDBS-UHFFFAOYSA-N 0.000 claims description 6
- 229920002601 oligoester Polymers 0.000 claims description 6
- 150000007524 organic acids Chemical class 0.000 claims description 6
- 238000005809 transesterification reaction Methods 0.000 claims description 6
- 229920001225 polyester resin Polymers 0.000 claims description 5
- 239000004645 polyester resin Substances 0.000 claims description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 4
- 239000005711 Benzoic acid Substances 0.000 claims description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 3
- 239000002253 acid Substances 0.000 claims description 3
- 235000010233 benzoic acid Nutrition 0.000 claims description 3
- 239000003054 catalyst Substances 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 238000007334 copolymerization reaction Methods 0.000 claims description 3
- 239000007822 coupling agent Substances 0.000 claims description 3
- 239000003085 diluting agent Substances 0.000 claims description 3
- 239000000945 filler Substances 0.000 claims description 3
- 235000011187 glycerol Nutrition 0.000 claims description 3
- 239000003999 initiator Substances 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 239000000178 monomer Substances 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- 229920005862 polyol Polymers 0.000 claims description 3
- 150000003077 polyols Chemical class 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 19
- 230000000694 effects Effects 0.000 abstract description 11
- 230000001965 increasing effect Effects 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 230000004927 fusion Effects 0.000 description 3
- 238000003780 insertion Methods 0.000 description 3
- 230000037431 insertion Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 210000005056 cell body Anatomy 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000008595 infiltration Effects 0.000 description 2
- 238000001764 infiltration Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000000048 melt cooling Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
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- Sealing Material Composition (AREA)
Abstract
The invention discloses an unsaturated polyester resin pipe joint and a production process thereof, which belong to the technical field of pipe joints, and comprise an outer layer resin pipe and an inner layer metal pipe, wherein a plurality of placing grooves are formed in the outer part of the inner layer metal pipe, an elastic sealing structure and a jacking sealing structure are connected in the placing grooves, sealing elastic sheets fixed through deformation capsules can be well embedded into the placing grooves, the sealing elastic sheets are conveniently placed into the placing grooves, meanwhile, when the inner layer metal pipe is placed into the inner layer resin pipe after hot melting, the residual hot melting temperature in the inner layer resin pipe can melt paraffin in the deformation capsules, after the paraffin is melted, the deformation capsules lose the fixation of the sealing elastic sheets at two sides, the sealing elastic sheets radially expand outwards through self elasticity, the outer rings of the sealing elastic sheets can be directly inserted into the inner layer resin pipe after hot melting through the self radial expansion, so that a stronger sealing effect is formed, and the entry of water flow is reduced.
Description
Technical Field
The invention relates to the technical field of pipe joints, in particular to an unsaturated polyester resin pipe joint and a production process thereof.
Background
The unsaturated polyester resin pipe joint is a connecting element widely applied to a fluid conveying system, and has excellent corrosion resistance, high pressure resistance and temperature resistance. With the increasing demands of the industry for fluid delivery systems, unsaturated polyester resin pipe joints are receiving great attention for their good material properties and processability. And in the use process of the existing polyester resin pipe joint, a metal pipe joint is mostly additionally arranged in the polyester resin pipe joint, so that the plastic pipe is prevented from deforming: in some special applications, the plastic tube may be deformed by external pressure or temperature. The metal pipe is added to effectively prevent the plastic pipe from deforming and maintain the stability and reliability of the pipeline system.
In a patent name of a PPR water pipe joint, the patent with the publication number of CN112780867B proposes that the PPR water pipe and the metal joint are made of different materials, so that the expansion degree of the PPR water pipe is different, and therefore, the expansion degree of the PPR water pipe is larger than that of the metal joint, so that the PPR water pipe and the metal joint are easily caused to generate a gap, and hot water leaks or sprays water, so that workers are easily scalded, and the sealing ring is beneficial to sealing the PPR water pipe joint body and the metal joint by adopting the piston ring.
Disclosure of Invention
The invention aims to provide an unsaturated polyester resin pipe joint and a production process thereof, which are used for solving the problems in the background technology.
In order to achieve the above purpose, the present invention provides the following technical solutions: the unsaturated polyester resin pipe joint comprises an outer layer resin pipe and an inner layer metal pipe, wherein the inner layer metal pipe is connected to the inner part of the outer layer resin pipe, a plurality of placing grooves are formed in the outer part of the inner layer metal pipe, and an elastic sealing structure and a jacking sealing structure are connected to the inner part of the placing grooves;
the elastic sealing structure comprises a plurality of elastic sealing sheets, the elastic sealing sheets are clamped to the inner wall of the placing groove, separation fractures are formed in the outer portion of the elastic sealing sheets, deformation bag bodies are connected to one sides, close to each other, of the separation fractures of the elastic sealing sheets, paraffin is filled in the deformation bag bodies, when the elastic sealing sheets are clamped to the inner portion of the placing groove, and when the inner layer metal tube is placed in an inner hole of the outer layer resin tube after hot melting, paraffin is melted in the deformation bag bodies, after the paraffin is melted, the elastic sealing sheets can radially expand through self elasticity, so that gaps between the outer layer resin tube and the inner layer metal tube are sealed, and the top pressing sealing structure is attached to the outer wall of the elastic sealing sheets.
Preferably, the outer ring of the sealing elastic sheet is integrally formed with two top inserting sealing plates, one side of each of the two top inserting sealing plates, which is far away from the sealing elastic sheet, is in a blade shape, and the two top inserting sealing plates are inclined by 1-3 degrees relative to the sealing elastic sheet in a Y shape.
Preferably, a plurality of reversely inclined plates are integrally formed on the opposite sides of the two top inserted sealing plates, and the sides of the reversely inclined plates, which are far away from the top inserted sealing plates, are inclined outwards by 1-2 degrees.
Preferably, the reverse inclined plate is composed of the hot-melting layer and an elastic inclined plate, and the hot-melting layer is arranged opposite to one side of the two top inserted sealing plates.
Preferably, the jacking sealing structure comprises an extrusion seat, a magnetic rubber ring is integrally formed outside the extrusion seat, one side, away from the extrusion seat, of the magnetic rubber ring is attached to the outer wall of the sealing elastic piece, and the magnetic rubber ring and the extrusion seat are both located in the groove.
Preferably, the magnetic rubber ring and the extrusion seat are provided with a plurality of concave holes, the magnetic rubber ring and the concave holes are provided with a plurality of exhaust holes, and one end of each exhaust hole is communicated with the concave hole.
Preferably, a plurality of stretching parts are integrally formed on one side of the deformation bag body, which is close to the top inserting sealing plate, and one side of the stretching parts, which is far away from the deformation bag body, is adhered to the outer wall of the top inserting sealing plate.
Preferably, the separation fracture of the sealing elastic sheets is arranged in a staggered mode, and iron powder is mixed in the paraffin.
The invention also provides a production process of the unsaturated polyester resin pipe joint, which comprises the following steps:
s1, preparing raw materials: mixing 10-30 parts by weight of organic acid, 15-20 parts by weight of glycerin, 10-30 parts by weight of dihydric alcohol, 50-70 parts by weight of polyester resin, 0.5-5 parts by weight of initiator, 0.1-2 parts by weight of accelerator, 5-20 parts by weight of diluent, 10-50 parts by weight of filler and 0.5-5 parts by weight of coupling agent;
s2, transesterification: reacting the highly purified polyol with low acid value and colorless transparent anhydride to generate oligoester anhydride, adding 1-3 parts by weight of catalyst in the reaction process, and reacting at 100-150 ℃;
s3, polymerization reaction: after the transesterification is finished, entering a polymerization stage, carrying out copolymerization reaction on the oligoester and an unsaturated monomer to form unsaturated polyester resin, wherein the polymerization reaction temperature is 80-220 ℃, and the unsaturated polyester resin is formed after the polymerization reaction;
s4, curing reaction: adding a curing agent into the unsaturated polyester resin to enable the unsaturated polyester resin to be rapidly cured to form a particle raw material;
s5, injection molding: injecting the solidified granular raw material into an injection molding machine, and performing injection molding to form a pipe joint;
s6, assembling: the single pipe joint is internally inserted into the hot melting rod, so that the pipe joint is internally melted, and the inner metal pipe with the sealing elastic sheet and the extrusion seat is inserted into the pipe joint after the hot melting after the pipe joint is internally melted, so that the pipe joint and the outer wall of the inner metal pipe form fixed bonding, and the assembly production of the pipe joint is completed.
Preferably, the organic acid in S1 is benzoic acid or isophthalic acid.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, through the arrangement of the sealing elastic sheet and the deformation capsule, when the inner metal tube is filled into the hot-melted outer resin tube, the sealing elastic sheet fixed by the deformation capsule can be well embedded into the placing groove, so that the sealing elastic sheet is conveniently placed into the placing groove, meanwhile, when the inner metal tube is placed into the hot-melted outer resin tube, the residual hot melting temperature in the outer resin tube can melt paraffin in the deformation capsule, after the paraffin is melted, the deformation capsule loses the fixation of the sealing elastic sheets on two sides, the sealing elastic sheets radially expand outwards through self elasticity, and the outer ring of the sealing elastic sheet is in a cutter blade shape and can be directly inserted into the hot-melted outer resin tube through self radial expansion, so that a stronger sealing effect is formed, and the entry of water flow is reduced;
in the invention, after the sealing elastic sheet radially expands through self elasticity and cuts into the inner layer of the outer resin pipe after hot melting, the two top inserted sealing plates of the outer ring of the sealing elastic sheet can cut into the deeper layer of the outer resin pipe again in a Y shape, so that the connection between the sealing elastic sheet and the outer resin pipe is enhanced, and the sealing effect between the sealing elastic sheet and the outer resin pipe is enhanced.
Drawings
FIG. 1 is a schematic diagram of an embodiment of the present invention;
FIG. 2 is a schematic view showing a separation state structure of an outer resin tube and an inner metal tube according to an embodiment of the present invention;
FIG. 3 is a schematic view of the structure of the annular seal elastomeric sheet and top insert seal plate in accordance with an embodiment of the present invention;
FIG. 4 is a schematic view of a cross-section of an embodiment of the present invention;
FIG. 5 is an enlarged schematic view of the area A in FIG. 3 according to an embodiment of the present invention;
FIG. 6 is a schematic view of the structure of the annular seal elastomeric sheet and top insert seal plate in accordance with an embodiment of the present invention;
FIG. 7 is a schematic view showing a bifurcation state structure of a top insertion seal plate according to an embodiment of the present invention;
FIG. 8 is a schematic view of the structure of a top insert seal plate and a counter tilt plate according to an embodiment of the present invention;
FIG. 9 is an enlarged schematic view of the area B in FIG. 4 according to the embodiment of the present invention;
FIG. 10 is a schematic view of a deformed capsule and paraffin according to an embodiment of the present invention;
FIG. 11 is an enlarged schematic view of the structure of the region C in FIG. 8 according to an embodiment of the present invention;
FIG. 12 is a schematic cross-sectional view of an extrusion die according to an embodiment of the present invention.
In the figure: 100. an outer resin tube; 101. an inner metal tube; 102. placing the groove; 103. sealing the elastic sheet; 104. extruding a base; 105. a deformation capsule body; 106. paraffin wax; 200. top inserting a sealing plate; 201. a stretching section; 300. a reverse inclined plate; 400. a hot melt layer; 401. an elastic inclined plate; 500. a magnetic rubber ring; 600. concave holes; 601. and an exhaust hole.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the invention, before the inner layer of the outer resin tube 100 is used, the inner metal tube 101 is placed into the outer resin tube 100 after being hot melted, and after the inner metal tube 101 enters the outer resin tube 100, the sealing elastic sheet 103 cuts into the inner wall of the outer resin tube 100 after being hot melted through self elasticity, so that the sealing elastic sheet 103 and the outer resin tube 100 form cut-in connection to enhance the integral tightness, and simultaneously when the sealing elastic sheet 103 cuts into the outer resin tube 100, the two top-inserted sealing plates 200 positioned at the outer edge of the sealing elastic sheet 103 are Y-shaped to be inserted into the outer resin tube 100 to form secondary connection and secondary sealing, thereby integrally reducing the water inflow and avoiding the leakage caused by water extrusion through the sealing elastic sheet 103.
Example 1
As shown in fig. 1-9, an unsaturated polyester resin pipe joint comprises an outer resin pipe 100 and an inner metal pipe 101, wherein the inner metal pipe 101 is connected to the inside of the outer resin pipe 100, a plurality of placing grooves 102 are formed in the outside of the inner metal pipe 101, and an elastic sealing structure and a jacking sealing structure are connected to the inside of the placing grooves 102;
the elastic sealing structure comprises a plurality of elastic sealing sheets 103, wherein the elastic sealing sheets 103 are clamped on the inner wall of the placement groove 102, separation fractures are formed in the outer portion of the elastic sealing sheets 103, deformation capsules 105 are connected to one sides, close to each other, of the separation fractures of the elastic sealing sheets 103, paraffin 106 is filled in the deformation capsules 105, when the elastic sealing sheets 103 are clamped on the inner portion of the placement groove 102 and the inner-layer metal tube 101 is placed in an inner hole of the outer-layer resin tube 100 after hot melting, paraffin 106 melts in the deformation capsules 105, after the paraffin 106 melts, the elastic sealing sheets 103 can radially expand through self elasticity, and therefore gaps between the outer-layer resin tube 100 and the inner-layer metal tube 101 are sealed, and the pressing sealing structure is attached to the outer wall of the elastic sealing sheets 103.
Specifically, in the assembly process of the outer resin tube 100 and the inner metal tube 101, a worker inserts the hot-melt rod into the outer resin tube 100, so that the outer resin tube 100 melts, after the outer resin tube 100 melts, the inner metal tube 101 is immediately inserted into the outer resin tube 100, the outer resin tube 100 and the inner metal tube 101 are connected in a hot-melt manner, after the inner metal tube 101 is inserted into the outer resin tube 100, residual heat generated by the hot-melt of the inner resin tube 100 is transmitted into the deformation capsule 105, paraffin 106 is filled in the deformation capsule 105, when heat is transmitted into the paraffin 106, the paraffin 106 melts, after the paraffin 106 melts, the deformation capsule 105 loses the fixing effect on the sealing elastic pieces 103 at two sides, after the deformation capsule 105 loses the fixing effect on the sealing elastic pieces 103, the sealing elastic pieces 103 radially expand outwards through self elasticity, the outer ring of the sealing elastic pieces 103 can directly pass through the inner resin tube 100 in a knife-blade shape, and the inner ring of the outer resin tube 100 is directly heated, so that the sealing elastic pieces are connected with the outer resin tube 100 in a more strongly cutting-in a sealing manner.
Further, when the sealing elastic piece 103 is filled into the placement groove 102, a worker can use an external heat source to heat the deformation capsule body 105, so that paraffin 106 in the deformation capsule body 105 melts, after the paraffin 106 melts, the sealing elastic piece 103 can rebound to an original state, the original state of the sealing elastic piece 103 can be easily clamped into the placement groove 102, when the sealing elastic piece 103 is clamped into the placement groove 102, the worker presses the sealing elastic piece 103 inwards, so that the sealing elastic piece 103 radially contracts, after the sealing elastic piece 103 radially contracts and completely contracts into the placement groove 102, the paraffin 106 in the deformation capsule body 105 is continuously waited for solidification, after the paraffin 106 solidifies, deformation of the deformation capsule body 105 can be prevented, and expansion deformation of the sealing elastic piece 103 can be limited, so that the sealing elastic piece 103 and the inner metal tube 101 can be kept in the placement groove 102 continuously before entering the outer resin tube 100.
Further, after the sealing elastic piece 103 cuts into the inner wall of the outer layer resin tube 100, the connection stability between the inner layer metal tube 101 and the outer layer resin tube 100 can be enhanced, and the detachment phenomenon between the outer layer resin tube 100 and the inner layer metal tube 101 can be avoided.
As shown in fig. 4-12, the pressing sealing structure includes a pressing seat 104, a magnetic rubber ring 500 is integrally formed outside the pressing seat 104, one side of the magnetic rubber ring 500 away from the pressing seat 104 is attached to the outer wall of the sealing elastic sheet 103, and both the magnetic rubber ring 500 and the pressing seat 104 are located inside the placement groove 102.
Specifically, in the use, with extrusion seat 104 laminating at the outer wall of sealed elastic piece 103 and together place into the inside of placing groove 102, can guarantee that sealed elastic piece 103 can not take place the phenomenon of slope in the inside of placing groove 102, extrude sealed elastic piece 103 through extrusion seat 104 simultaneously, guarantee that sealed elastic piece 103 can not appear the gap with place between groove 102, avoid placing groove 102's inside emergence infiltration phenomenon.
Further, when the connection between the sealing elastic piece 103 and the pressing seat 104 is performed, the pressing seat 104 can be directly adsorbed to the outer wall of the sealing elastic piece 103 through the arrangement of the magnetic rubber ring 500, so that the connection between the pressing seat 104 and the sealing elastic piece 103 is facilitated.
Further, the thermal expansion coefficient of the extrusion seat 104 is smaller than that of the outer resin tube 100, when the outer resin tube 100 is heated, the extrusion seat 104 will expand first, so that the extrusion seat 104 will press the sealing elastic sheet 103 in real time when the outer resin tube 100 is heated to expand, and water seepage is reduced.
The technical scheme in the embodiment of the application at least has the following technical effects or advantages: compared with the prior art, in this embodiment, seal elastic piece 103 directly cuts into the inner wall of outer resin pipe 100 in the installation, and after outer resin pipe 100 hot melt cooling, can form stronger sealed effect between outer resin pipe 100 and the seal elastic piece 103, reduce the infiltration phenomenon that produces under powerful rivers, simultaneously form through deformation cell body 105 in the fracture position department of seal elastic piece 103 and connect and seal, reduce the passage of rivers, the inside paraffin 106 of deformation cell body 105 can also assist the staff to install seal elastic piece 103 into the inside of placing groove 102 simultaneously, strengthen the sealing process, promote the installation convenience simultaneously.
Example two
Considering that when the outer resin tube 100 and the inside of the placement groove 102 continuously enter hot water in the use process, the outer resin tube 100 will gradually expand, when the outer resin tube 100 gradually expands, tiny gaps will be generated between the sealing elastic sheet 103 cut into the inside of the outer resin tube 100 and the outer resin tube 100, and water flow will penetrate into these tiny gaps, so as to generate leakage, and the following technical scheme is proposed to solve the technical problems, specifically:
as shown in fig. 3 to 8, the outer ring of the seal elastic sheet 103 is integrally formed with two top-inserted seal plates 200, one side of the two top-inserted seal plates 200 away from the seal elastic sheet 103 is in a blade shape, and the two top-inserted seal plates 200 are inclined by 1 to 3 ° in a Y shape with respect to the seal elastic sheet 103.
Specifically, during the installation and use of the inner metal tube 101, when the outer edge of the sealing elastic sheet 103 elastically enters the interior of the hot-melted outer resin tube 100 by itself, the two top-inserted sealing plates 200 positioned at the outer edge of the sealing elastic sheet 103 cut into the inner wall of the hot-melted outer resin tube 100, and when the top-inserted sealing plate 200 cuts into the inner wall of the hot-melted outer resin tube 100, the two top-inserted sealing plates 200 are inclined in Y-shape by 1-3, so that when the top-inserted sealing plate 200 cuts into the inner wall of the hot-melted outer resin tube 100, part of the hot-melted material of the outer resin tube 100 enters between the two top-inserted sealing plates 200, the space between the two top-inserted sealing plates 200 is filled, and the inclination angle of the two top-inserted sealing plates 200 is gradually increased during the continuous expansion of the sealing elastic sheet 103, so that a Y-shape is formed between the two top-inserted sealing plates 200, and the sealing elastic sheet 100 is continuously heated to expand and a fine gap is formed between the two top-inserted sealing plates 200, so that the Y-shape bifurcation formed by the two top-inserted sealing plates 200 can strengthen the connection between the sealing elastic sheet 103 and the outer resin tube 100 and the secondary leakage condition, thereby reducing the secondary leakage condition.
As shown in fig. 12, a plurality of concave holes 600 are formed at the outer portions of the magnetic rubber ring 500 and the pressing seat 104, a plurality of exhaust holes 601 are formed at the inner portions of the magnetic rubber ring 500 and the concave holes 600, and one end of the exhaust holes 601 is communicated with the concave holes 600.
Specifically, when the connection between the extrusion seat 104 and the sealing elastic piece 103 is performed, the magnetic rubber ring 500 can adsorb the extrusion seat 104 and the sealing elastic piece 103, so that the operator can install the extrusion seat 104 and the sealing elastic piece 103 together into the placing groove 102, and simultaneously when the whole extrusion seat 104 is adsorbed to the outer wall of the sealing elastic piece 103 through the magnetic rubber ring 500, the operator can annularly press the extrusion seat 104 from one side of the extrusion seat 104 away from the magnetic rubber ring 500, thereby exhausting air in the concave hole 600 through the exhaust hole 601, forming a negative pressure sucking disc effect between the concave hole 600 and the sealing elastic piece 103, and enhancing the connection stability between the extrusion seat 104 and the concave hole 600 through negative pressure.
As shown in fig. 5, a plurality of stretching portions 201 are integrally formed on the side of the deformation capsule 105 close to the top insertion sealing plate 200, and the side of the stretching portion 201 away from the deformation capsule 105 is adhered to the outer wall of the top insertion sealing plate 200.
Specifically, in the use process, after paraffin 106 in deformation capsule 105 melts, sealing elastic sheets 103 located at two sides of deformation capsule 105 will radially expand, thereby pulling deformation capsule 105, when deformation capsule 105 is pulled by two sides of sealing elastic sheets 103, inward deformation will be generated, when deformation capsule 105 generates inward deformation, a gap will be generated between inner wall of outer resin tube 100, and two top-inserted sealing plates 200 will pull deformation capsule 105 through stretching part 201 when being Y-shaped and expanding outwards, thereby reducing inward deformation of deformation capsule 105, and reducing gap between deformation capsule 105 and inner wall of outer resin tube 100.
The technical scheme in the embodiment of the application at least has the following technical effects or advantages: in contrast to the first embodiment, in the present embodiment, when the sealing elastic sheet 103 elastically cuts into the inner wall of the outer resin tube 100 after the heat fusion, the two top-inserted sealing plates 200 are cut into the inner wall of the outer resin tube 100 more deeply in a Y-shape to both sides, thereby forming a multi-layer seal and reducing the water seepage phenomenon.
Example III
Considering that the outer resin tube 100 continuously expands under the heated condition in the use process, when the expansion is continuously generated and the expansion range exceeds the expansion range of the sealing elastic sheet 103, water flows penetrate into the inside of the placement groove 102, and the water flows penetrate outwards through the placement groove 102 to form a channel, the following technical scheme is proposed to solve the technical problems, specifically:
as shown in fig. 8, a plurality of reverse inclined plates 300 are integrally formed at opposite sides of the two top-inserted sealing plates 200, and the sides of the reverse inclined plates 300 away from the top-inserted sealing plates 200 are inclined outwardly by 1-2 °.
Specifically, in the use process, when the top insert sealing plate 200 cuts into the inner wall of the outer resin tube 100, the reverse inclined plates 300 on the outer wall of the top insert sealing plate 200 also enter the inner wall of the outer resin tube 100 together, and when the outer resin tube 100 is heated to expand, the plurality of reverse inclined plates 300 on the outer side of the top insert sealing plate 200 penetrate into the inner side of the outer resin tube 100 reversely, and form an inward pulling force in combination with the sealing elastic sheet 103, and the sealing elastic sheet 103, the top insert sealing plate 200 and the reverse inclined plates 300 are all annular, so that an annular inward pulling force can be formed by the reverse inclined plates 300 when the outer resin tube 100 expands, thereby slowing down the continuous expansion of the outer resin tube 100.
The technical scheme in the embodiment of the application at least has the following technical effects or advantages: in contrast to the second embodiment, in the present embodiment, when the top-inserted sealing plate 200 is integrally cut into the inner wall of the outer resin tube 100 by the arrangement of the reverse inclined plate 300, the reverse inclined plate 300 is reversely cut into the inner wall of the outer resin tube 100, so that the outer resin tube 100 is pulled inwards after the outer resin tube 100 is heated to expand, and the expansion phenomenon of the outer resin tube 100 is reduced.
Example IV
Considering that the reverse inclined plate 300 may cut into the inside of the outer resin tube 100 to generate a tensile force, so as to reduce the continuous expansion of the outer resin tube 100, but the reverse inclined plate 300 may deform under the tensile force of the expansion of the outer resin tube 100, and cannot provide a continuous inward tensile force, the present application proposes the following technical scheme to solve the technical problems, specifically:
as shown in fig. 11, the reverse inclined plate 300 is composed of a heat fusion layer 400 and an elastic inclined plate 401, the heat fusion layer 400 being disposed opposite to the opposite side of the two top interposed sealing plates 200.
Specifically, the reverse inclined plate 300 is pulled after the outer resin tube 100 is heated and expanded, the reverse inclined plate 300 generates bending deformation after being subjected to tensile force, once the bending deformation possibly causes the reverse inclined plate 300 to not provide enough tensile force, the cost is increased by using other materials which are not easy to deform, the other materials are required to be connected with the top inserted sealing plate 200 for the second time, the unstable connection phenomenon between the top inserted sealing plate 200 can occur, the elastic inclined plate 401 and the hot-melt layer 400 can be integrally formed, the unstable connection phenomenon caused by the second time is reduced, the hot-melt layer 400 is solidified after being heated, the integral strength of the elastic inclined plate 401 is enhanced, and the deformation of the hot-melt layer 400 under the tensile force is avoided.
Further, the separating fracture of the sealing elastic pieces 103 is in a staggered arrangement, iron powder is doped in the paraffin 106, the phenomenon that water flows through the sealing elastic pieces 103 can be reduced due to the staggered arrangement of the sealing elastic pieces 103, meanwhile, the heating melting speed of the paraffin 106 can be increased due to the fact that iron powder is doped in the paraffin 106, and the melting speed of the paraffin 106 is increased.
The technical scheme in the embodiment of the application at least has the following technical effects or advantages: compared with the third embodiment, in the present embodiment, through the arrangement of the elastic inclined plate 401, after the elastic inclined plate 401 is heated, the elastic inclined plate 401 forms a thermosetting phenomenon outside the hot-melt layer 400, so that the strength of the hot-melt layer 400 is integrally increased, the phenomenon that the elastic inclined plate 401 deforms after being stressed is avoided, and a sufficient backing and pulling supporting force is provided for the elastic inclined plate 401.
The invention also provides a production process of the unsaturated polyester resin pipe joint, which comprises the following steps:
s1, preparing raw materials: mixing 10-30 parts by weight of organic acid, 15-20 parts by weight of glycerin, 10-30 parts by weight of dihydric alcohol, 50-70 parts by weight of polyester resin, 0.5-5 parts by weight of initiator, 0.1-2 parts by weight of accelerator, 5-20 parts by weight of diluent, 10-50 parts by weight of filler and 0.5-5 parts by weight of coupling agent;
s2, transesterification: reacting the highly purified polyol with low acid value and colorless transparent anhydride to generate oligoester anhydride, adding 1-3 parts by weight of catalyst in the reaction process, and reacting at 100-150 ℃;
s3, polymerization reaction: after the transesterification is finished, entering a polymerization stage, carrying out copolymerization reaction on the oligoester and an unsaturated monomer to form unsaturated polyester resin, wherein the polymerization reaction temperature is 80-220 ℃, and the unsaturated polyester resin is formed after the polymerization reaction;
s4, curing reaction: adding a curing agent into the unsaturated polyester resin to enable the unsaturated polyester resin to be rapidly cured to form a particle raw material;
s5, injection molding: injecting the solidified granular raw material into an injection molding machine, and performing injection molding to form a pipe joint;
s6, assembling: the single pipe joint is internally inserted into a hot melting rod to melt the pipe joint, and after the pipe joint is internally melted, the inner layer metal pipe 101 with the sealing elastic sheet 103 and the extrusion seat 104 is inserted into the pipe joint after the hot melting, so that the pipe joint and the outer wall of the inner layer metal pipe 101 form fixed bonding, and the assembly production of the pipe joint is completed.
Further, as the organic acid in S1, benzoic acid or isophthalic acid is used.
The above is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and variations of the present invention will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. An unsaturated polyester resin pipe joint, includes outer resin pipe (100) and inlayer metal pipe (101), inlayer metal pipe (101) connect in the inside of outer resin pipe (100), its characterized in that: a plurality of placing grooves (102) are formed in the outer portion of the inner-layer metal pipe (101), and an elastic sealing structure and a jacking sealing structure are connected inside the placing grooves (102);
the elastic sealing structure comprises a plurality of sealing elastic sheets (103), wherein the sealing elastic sheets (103) are clamped to the inner wall of the placement groove (102), separation fractures are formed in the outer portion of the sealing elastic sheets (103), deformation capsules (105) are connected to one sides, close to each other, of the separation fractures of the sealing elastic sheets (103), paraffin (106) are filled in the deformation capsules (105), when the sealing elastic sheets (103) are clamped to the inner portion of the placement groove (102) and the inner metal tube (101) is placed in an inner hole of the outer resin tube (100) after hot melting, the paraffin (106) melts in the deformation capsules (105), the sealing elastic sheets (103) radially expand through self elasticity after the paraffin (106) melts, and therefore gaps between the outer resin tube (100) and the inner metal tube (101) are sealed, and the top pressing sealing structure is attached to the outer wall of the sealing elastic sheets (103);
the top pressure seal structure includes extrusion seat (104), the outside integrated into one piece of extrusion seat (104) has magnetic rubber ring (500), magnetic rubber ring (500) keep away from one side of extrusion seat (104) laminate in the outer wall of sealed elastic sheet (103), magnetic rubber ring (500) with extrusion seat (104) all are located the inside of placing recess (102).
2. An unsaturated polyester resin pipe joint according to claim 1, wherein: the outer ring integrated into one piece of sealed elastic piece (103) has two top to insert closing plate (200), and two top are inserted closing plate (200) and are kept away from one side of sealed elastic piece (103) and are in the form of blade, two top are inserted closing plate (200) and are 1-3 relative sealed elastic piece (103) Y form slope.
3. An unsaturated polyester resin pipe joint according to claim 1, wherein: a plurality of reverse inclined plates (300) are integrally formed on the opposite sides of the two top inserted sealing plates (200), and one side of each reverse inclined plate (300) far away from the top inserted sealing plate (200) is inclined outwards by 1-2 degrees.
4. An unsaturated polyester resin pipe joint according to claim 3, characterized in that: the reverse inclined plate (300) consists of a hot-melt layer (400) and an elastic inclined plate (401), wherein the hot-melt layer (400) is oppositely arranged on one side of the two top inserted sealing plates (200) opposite to each other.
5. An unsaturated polyester resin pipe joint according to claim 4, wherein: the magnetic rubber ring (500) with a plurality of concave holes (600) have been seted up to the outside of extrusion seat (104), magnetic rubber ring (500) with a plurality of exhaust holes (601) have been seted up to the inside of concave hole (600), the one end of exhaust hole (601) with concave hole (600) are linked together.
6. An unsaturated polyester resin pipe joint according to claim 5, wherein: a plurality of stretching parts (201) are integrally formed on one side, close to the top inserting sealing plate (200), of the deformation capsule body (105), and one side, far away from the deformation capsule body (105), of the stretching parts (201) is adhered to the outer wall of the top inserting sealing plate (200).
7. An unsaturated polyester resin pipe joint according to claim 6, wherein: the separation fracture of the sealing elastic sheets (103) is arranged in a staggered mode, and iron powder is mixed in the paraffin (106).
8. A process for producing an unsaturated polyester resin pipe joint according to any one of claims 1 to 7, characterized by comprising the steps of:
s1, preparing raw materials: mixing 10-30 parts by weight of organic acid, 15-20 parts by weight of glycerin, 10-30 parts by weight of dihydric alcohol, 50-70 parts by weight of polyester resin, 0.5-5 parts by weight of initiator, 0.1-2 parts by weight of accelerator, 5-20 parts by weight of diluent, 10-50 parts by weight of filler and 0.5-5 parts by weight of coupling agent;
s2, transesterification: reacting the highly purified polyol with low acid value and colorless transparent anhydride to generate oligoester anhydride, adding 1-3 parts by weight of catalyst in the reaction process, and reacting at 100-150 ℃;
s3, polymerization reaction: after the transesterification is finished, entering a polymerization stage, carrying out copolymerization reaction on the oligoester and an unsaturated monomer to form unsaturated polyester resin, wherein the polymerization reaction temperature is 80-220 ℃, and the unsaturated polyester resin is formed after the polymerization reaction;
s4, curing reaction: adding a curing agent into the unsaturated polyester resin to enable the unsaturated polyester resin to be rapidly cured to form a particle raw material;
s5, injection molding: injecting the solidified granular raw material into an injection molding machine, and performing injection molding to form a pipe joint;
s6, assembling: the single pipe joint is internally inserted into a hot melting rod to melt the pipe joint, and after the pipe joint is internally melted, an inner metal pipe (101) with a sealing elastic sheet (103) and an extrusion seat (104) is inserted into the pipe joint after the hot melting, so that the pipe joint and the outer wall of the inner metal pipe (101) form fixed bonding, and the assembly production of the pipe joint is completed.
9. The process for producing an unsaturated polyester resin pipe joint according to claim 8, wherein: the organic acid in S1 is benzoic acid or isophthalic acid.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB773033A (en) * | 1954-09-25 | 1957-04-17 | Resina Spa | Improvements in or relating to spigot and socket joints |
| US4174735A (en) * | 1975-12-31 | 1979-11-20 | B.V. Neratoom | Method of temporarily sealing open ends of fluid conduits terminating in a header space |
| KR20190021677A (en) * | 2017-08-23 | 2019-03-06 | 허나리 | Connecting device for plastic pipe |
| CN111022784A (en) * | 2019-12-20 | 2020-04-17 | 信达科创（唐山）石油设备有限公司 | Ultra-long heat-insulating pipeline and processing method thereof |
| CN112780867A (en) * | 2019-11-11 | 2021-05-11 | 安徽汇久管业有限公司 | Water pipe joint for PPR conversion |
| CN115528491A (en) * | 2022-10-08 | 2022-12-27 | 南京辰光融信技术有限公司 | Multifunctional conversion interface for color facsimile communication system |
-
2024
- 2024-03-01 CN CN202410236082.3A patent/CN117823737B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB773033A (en) * | 1954-09-25 | 1957-04-17 | Resina Spa | Improvements in or relating to spigot and socket joints |
| US4174735A (en) * | 1975-12-31 | 1979-11-20 | B.V. Neratoom | Method of temporarily sealing open ends of fluid conduits terminating in a header space |
| KR20190021677A (en) * | 2017-08-23 | 2019-03-06 | 허나리 | Connecting device for plastic pipe |
| CN112780867A (en) * | 2019-11-11 | 2021-05-11 | 安徽汇久管业有限公司 | Water pipe joint for PPR conversion |
| CN111022784A (en) * | 2019-12-20 | 2020-04-17 | 信达科创（唐山）石油设备有限公司 | Ultra-long heat-insulating pipeline and processing method thereof |
| CN115528491A (en) * | 2022-10-08 | 2022-12-27 | 南京辰光融信技术有限公司 | Multifunctional conversion interface for color facsimile communication system |
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| CN117823737B (en) | 2024-05-03 |
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