CN110410617B - Pipe fitting with strong anti-impact capability - Google Patents

Pipe fitting with strong anti-impact capability Download PDF

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Publication number
CN110410617B
CN110410617B CN201910619919.1A CN201910619919A CN110410617B CN 110410617 B CN110410617 B CN 110410617B CN 201910619919 A CN201910619919 A CN 201910619919A CN 110410617 B CN110410617 B CN 110410617B
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pipe
pipe fitting
inclined surface
crest
wave
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CN110410617A (en
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张绍梅
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D23/00—Producing tubular articles
    • B29D23/001—Pipes; Pipe joints
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/10—Homopolymers or copolymers of propene
    • C08L23/12—Polypropene
    • 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
    • F16L57/00—Protection of pipes or objects of similar shape against external or internal damage or wear
    • F16L57/02—Protection of pipes or objects of similar shape against external or internal damage or wear against cracking or buckling
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • C08K2003/2217—Oxides; Hydroxides of metals of magnesium
    • C08K2003/2224—Magnesium hydroxide
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/38—Boron-containing compounds
    • C08K2003/387—Borates
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K2201/00—Specific properties of additives
    • C08K2201/014—Additives containing two or more different additives of the same subgroup in C08K
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2201/00—Properties
    • C08L2201/02—Flame or fire retardant/resistant
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2203/00—Applications
    • C08L2203/18—Applications used for pipes
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
    • C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)

Abstract

The invention relates to the technical field of pipe fittings, in particular to a pipe fitting with strong anti-impact capability, which comprises a main pipe, wherein the main pipe comprises a pipe body and a plurality of reinforcing blocks sleeved on the periphery of the pipe body, a reinforcing ring sleeved on the periphery of the pipe body is arranged between two adjacent reinforcing blocks, each reinforcing block comprises a first wave crest, a wave trough and a second wave crest, one side of the first wave crest is connected with the pipe body, the other side of the first wave crest is connected with one side of the wave trough, one side of the second wave crest is connected with the other side of the wave trough, and the other side of the second wave crest is connected with the pipe body. According to the invention, the reinforcing rings are arranged between the two adjacent reinforcing blocks, so that the pipe fitting cannot be broken at the interval under the condition that the interval between the two adjacent reinforcing blocks is larger, and the compression resistance of the pipe fitting is enhanced through lower cost.

Description

Pipe fitting with strong anti-impact capability
Technical Field
The invention relates to the technical field of pipe fittings, in particular to a pipe fitting with strong anti-impact capability.
Background
In order to enhance the pressure resistance of the pipe, manufacturers often set a plurality of reinforcing blocks on the pipe body. When the interval between two adjacent reinforcing blocks is bigger, the interval can be weak because of span is bigger and compressive capacity, but when two adjacent reinforcing blocks are smaller, more reinforcing blocks are needed to be arranged on the pipe body, which leads to more materials for the pipe fitting and high cost.
Disclosure of Invention
In order to overcome the defects and shortcomings in the prior art, the invention aims to provide a pipe fitting with low cost and strong anti-impact capability.
The aim of the invention is achieved by the following technical scheme: the utility model provides a pipe fitting that impact resistance is strong, includes the person in charge, be responsible for including body and cover establish a plurality of strengthening blocks at the body periphery, be provided with the cover between two adjacent strengthening blocks and establish the strengthening ring at the body periphery, the strengthening block includes first crest, trough and second crest, one side and the body coupling of first crest, the opposite side and the one side of trough of first crest are connected, one side and the opposite side of trough of second crest are connected, the opposite side and the body coupling of second crest.
Preferably, the longitudinal sections of the pipe body, the first wave crest, the wave trough and the second wave trough are all round.
Preferably, the first peak comprises a first inclined plane section, a flat section and a second inclined plane section, one end of the first inclined plane section is connected with the pipe body, the other end of the first inclined plane section is connected with one end of the flat section, one end of the second inclined plane section is connected with one end of the flat section, and the other end of the second inclined plane section is connected with the trough.
Preferably, rounded corners are arranged between the first inclined surface section and the straight section and between the second inclined surface section and the straight section.
Preferably, the pipe fitting with strong anti-impact capability further comprises a straight inner pipe arranged in the main pipe, and the straight inner pipe is connected with the inner wall of the pipe body.
Preferably, the pipe fitting with strong anti-impact capability further comprises a straight outer pipe, the main pipe is arranged inside the straight outer pipe, and the first wave crest and the second wave crest are connected with the inner wall of the straight outer pipe.
Preferably, the pipe fitting with strong anti-impact capability comprises at least two pipe units which are connected in sequence, all pipe units comprise the main pipe and the straight outer pipe, one end of the main pipe is provided with a protruding part which protrudes out of one end of the straight outer pipe, the outer periphery of the protruding part protrudes to form a protruding block, the other end of the straight outer pipe protrudes to form a connecting sleeve, the inner wall of the connecting sleeve is provided with a first clamping block and a second clamping block, the first clamping block and the second clamping block are distributed along the axial direction of the connecting sleeve, a clamping groove is formed between the first clamping block and the second clamping block, the protruding part in one pipe unit is used for extending into the connecting sleeve in the other pipe unit, and the protruding block in the pipe unit is used for being clamped with the clamping groove in the other pipe unit.
Preferably, a sealing ring is sleeved on the periphery of the protruding part, and the sealing ring in one pipe unit is used for abutting against the inner wall of the connecting sleeve in the other pipe unit.
Preferably, the main pipe comprises the following raw materials in parts by weight:
The main pipe is prepared from the raw materials, polypropylene is used as a main material, and other resins, fillers and additives are added to carry out composite modification on the main pipe, so that the impact strength, the tensile strength and the low smoke flame retardance of the main pipe are improved, the UL94 flame retardance grade can reach V-0 grade (0.8 mm), and the main pipe is resistant to low-temperature impact at minus 40 ℃. The polycarbonate has high strength and elastic coefficient, high impact strength, good weather resistance and wide use temperature range, and the low-temperature impact resistance of the main pipe is further improved by combining the synergistic effect of the impact modifier and the amide nucleating agent; the surface modifier is added, so that the compatibility of the flame retardant, the smoke suppressant and the anti-dripping agent in polypropylene is improved, the low smoke flame retardance and the anti-dripping performance of the main pipe are improved, and the reduction of the impact strength and the tensile strength of the main pipe is avoided.
More preferably, the flame retardant is compounded by melamine polyphosphate, diethyl aluminum phosphinate and magnesium hydroxide according to the weight ratio of 1-2:2-4:1-3.
By adopting the technical scheme, the three materials are synergistic and flame-retardant, the aluminum diethylphosphinate mainly generates flame-retardant effect through a gas phase, the aluminum diethylphosphinate is decomposed into diethyl phosphinate to volatilize to the gas phase in the combustion process, and free radicals generated by combustion are captured to inhibit the combustion; the melamine polyphosphate is decomposed into gases such as volatile CO 2, NH 3 and the like, and flame retardance is generated by diluting and burning oxygen in three elements; the magnesium hydroxide releases bound water when being heated and decomposed, absorbs a large amount of latent heat to reduce the surface temperature of the main pipe in flame, has the functions of inhibiting polymer decomposition and cooling generated combustible gas, and the magnesium oxide generated by the heated and decomposed magnesium oxide is a good refractory material, so that the magnesium oxide can improve the fire resistance of the main pipe, and meanwhile, the steam released by the heated and decomposed magnesium oxide can inhibit smoke. The three components are compounded, the consumption of the flame retardant accounts for 14.9-31.4% of the total raw material consumption of the main pipe, and the consumption of the flame retardant in the main pipe is greatly reduced, so that the mechanical property of the main pipe is prevented from being reduced and embrittled due to excessive consumption of the flame retardant.
More preferably, the smoke suppressant is at least one of zinc oxide, zinc borate, zinc stannate, zinc hydroxystannate, zinc aluminate, zinc molybdate, zinc hypophosphite and zinc borophosphate.
By adopting the technical scheme, the smoke generation amount can be reduced without deteriorating the flame retardance of the material. More preferably, the smoke suppressant is formed by compounding zinc borate, zinc aluminate and zinc molybdate according to the weight ratio of 1:2-5:8, can catalyze solid-phase decomposition, promote formation of a carbon layer, change the structure of the carbon layer, reduce release of volatile hydrocarbon and benzene, and keep most of the volatile hydrocarbon and benzene in the carbon layer, and zinc molybdate can form a crosslinked polymer chain through metal bonding or through reductive coupling of C-Cl bonds, so that the contribution of combustible matters to flame is reduced.
More preferably, the anti-dripping agent is an anti-dripping agent obtained by coating polytetrafluoroethylene with polycarbonate by an emulsion polymerization method.
By adopting the technical scheme, the compatibility of the anti-dripping agent and the PP/PC resin is improved, the stability of the anti-dripping agent is improved, and the impact resistance of a main pipe is reduced due to the fact that polytetrafluoroethylene is incompatible with the resin.
More preferably, the surface modifier is an aluminate coupling agent or a titanate coupling agent.
By adopting the technical scheme, the flame retardant, the smoke suppressant and the anti-dripping agent are more easily compatible with the PP/PC, the effects of the flame retardant, the smoke suppressant and the anti-dripping agent are fully exerted, the low-smoke flame retardance and the anti-dripping performance of the main pipe can be improved, and the reduction of the impact strength and the tensile strength of the main pipe can be avoided.
More preferably, the impact modifier is a combination of at least two of chlorinated polyethylene, ethylene-vinyl acetate copolymer, and methyl methacrylate-butadiene-styrene copolymer.
By adopting the technical scheme, the low-temperature embrittlement of the PP/PC is improved, and the impact strength is improved, but the addition of the impact modifier is easy to reduce the tensile strength of the PP, so that the impact modifier is combined with the PC and the amide nucleating agent, and the characteristics of the PC and the crystal form structure of the amide nucleating agent are utilized, so that the impact strength is improved, the tensile strength of the material is improved, and the toughness is improved. More preferably, the impact modifier is compounded from chlorinated polyethylene, ethylene-vinyl acetate copolymer and methyl methacrylate-butadiene-styrene copolymer in a weight ratio of 4:2-5:1, so that the reduction of tensile strength and bending strength caused by excessive addition of the methyl methacrylate-butadiene-styrene copolymer is avoided.
More preferably, the preparation method of the amide nucleating agent comprises the following steps: and taking the amide alpha crystal form nucleating agent, melting the amide alpha crystal form nucleating agent at 220-230 ℃ for 5-8min, and then quenching and recrystallizing the amide alpha crystal form nucleating agent in water to obtain the amide nucleating agent.
By adopting the technical scheme, a part of the amide alpha crystal form nucleating agent is recrystallized and amide beta crystal form nucleating agent is generated, the amide beta crystal form nucleating agent and the amide alpha crystal form nucleating agent act cooperatively, and PC and the impact modifier are combined to jointly enable the material to resist stamping at minus 40 ℃.
Preferably, the preparation method of the main pipe comprises the following steps:
(S1) weighing raw materials in parts by weight for later use;
(S2) mixing the flame retardant, the smoke suppressant and the surface modifier, and stirring for 5-10min at the rotation speed of 800-1000rpm to obtain a mixed filler;
and (S3) adding other raw materials into the mixed filler obtained in the step (S2), uniformly mixing, feeding into extrusion equipment under the protection of nitrogen for melt extrusion, granulating, and then injection molding the complete main pipe.
More preferably, in the step (S3), the screw speed of the extrusion device is 60-120r/min, the temperature of the first zone of the extrusion device is 180-190 ℃, the temperature of the second zone is 170-175 ℃, the temperature of the third zone is 175-180 ℃, the temperature of the fourth zone is 180-185 ℃, the temperature of the fifth zone is 185-190 ℃, and the temperature of the die head is 185-195 ℃.
The main pipe prepared by the preparation method provided by the invention has excellent stamping strength, tensile strength and low smoke flame retardance, and the UL94 flame retardance grade can reach V-0 grade (0.8 mm) and is resistant to low-temperature impact at minus 40 ℃; the preparation method has the advantages of simple operation, convenient control, high production efficiency and low production cost, and can be used for large-scale production. In the step (S2), the flame retardant, the smoke suppressant and the surface modifier are mixed to modify the flame retardant and the smoke suppressant, so that the compatibility is improved.
The invention has the beneficial effects that: through set up the strengthening ring between two adjacent strengthening blocks to make the pipe fitting also can not fracture in interval department under the great circumstances of interval between two adjacent strengthening blocks, and then strengthen the compressive capacity of pipe fitting through lower cost.
Drawings
Fig. 1 is a perspective view of embodiment 1 of the present invention.
Fig. 2 is a cross-sectional view taken along A-A' of fig. 1.
Fig. 3 is an enlarged schematic view of a portion B in fig. 2.
Fig. 4 is a front view of embodiment 2 of the present invention.
Fig. 5 is a cross-sectional view of fig. 4 along the direction C-C'.
Fig. 6 is an enlarged schematic view of the direction D in fig. 5.
Fig. 7 is a perspective view showing the cooperation of a plurality of pipe units in the present invention.
The reference numerals are: 1. a main pipe; 11. a protruding portion; 111. a bump; 2. a tube body; 3. a reinforcing block; 31. a first peak; 311. a first ramp section; 312. a straight section; 313. a second ramp section; 32. a trough; 33. a second peak; 34. round corners; 4. a reinforcing ring; 5. straightening the inner tube; 6. straightening the outer tube; 61. connecting sleeves; 62. a first clamping block; 63. a second clamping block; 7. a pipe unit; 8. and (3) sealing rings.
Detailed Description
The present invention will be further described with reference to examples and drawings, which are not intended to be limiting, for the understanding of those skilled in the art.
Example 1
As shown in fig. 1 to 3, a pipe fitting with strong impact pressure resistance comprises a main pipe 1, wherein the main pipe 1 comprises a pipe body 2 and a plurality of reinforcing blocks 3 sleeved on the periphery of the pipe body 2, a reinforcing ring 4 sleeved on the periphery of the pipe body 2 is arranged between two adjacent reinforcing blocks 3, each reinforcing block 3 comprises a first peak 31, a trough 32 and a second peak 33, one side of the first peak 31 is connected with the pipe body 2, the other side of the first peak 31 is connected with one side of the trough 32, one side of the second peak 33 is connected with the other side of the trough 32, and the other side of the second peak 33 is connected with the pipe body 2.
The reinforcing block 3 can greatly improve the compression resistance of the pipe fitting, but the material consumption is more; the reinforcement ring 4 can slightly increase the compression resistance of the pipe but with less material. In the embodiment, the reinforcing blocks 3 are matched with the reinforcing rings 4, so that the pipe fitting has better pressure resistance through lower cost. The larger the span the worse the load carrying capacity of the plane, when the spacing between two adjacent reinforcing blocks 3 is large, there will be a larger span between the adjacent reinforcing blocks 3, which is why the spacing is subject to breakage. In this embodiment, by arranging the reinforcing rings 4 at the spacing, a span is formed between one reinforcing block 3 and the reinforcing ring 4, and another span is formed between the other reinforcing block 3 and the reinforcing ring 4, that is, two smaller spans are formed between two adjacent reinforcing blocks 3, so that the pipe is not easy to break even if the spacing between two adjacent reinforcing blocks 3 is large. When the width of the reinforcing block 3 is set to be wide, the reinforcing block 3 may also be broken when pressed because of its large span. The present embodiment reduces the span on the reinforcing block 3 by providing the first peaks 31, the valleys 32 and the second peaks 33 on the reinforcing block 3, thereby preventing the reinforcing block 3 from being broken and further improving the compression resistance of the present embodiment.
As shown in fig. 1, the longitudinal sections of the pipe body 2, the first wave crest 31, the wave trough 32 and the second wave trough 32 are all circular. The pipe fitting with the circular longitudinal section is easier to manufacture and saves more materials, so that the manufacturing cost of the embodiment is lower.
As shown in fig. 3, the first peak 31 includes a first inclined surface section 311, a flat section 312, and a second inclined surface section 313, one end of the first inclined surface section 311 is connected to the pipe body 2, the other end of the first inclined surface section 311 is connected to one end of the flat section 312, one end of the second inclined surface section 313 is connected to one end of the flat section 312, and the other end of the second inclined surface section 313 is connected to the trough 32. The supporting ability of the inclined surface is stronger according to the stability of the triangle, so the present embodiment adopts the first inclined surface section 311 and the second inclined surface section 313 to support the flat section 312, thereby improving the compressive ability of the present embodiment.
As shown in fig. 3, rounded corners 34 are disposed between the first inclined surface section and the flat section 312 and between the second inclined surface section 313 and the flat section 312, so as to effectively prevent the corners formed between the first inclined surface section 311 and the flat section 312 from scratching a user.
As shown in fig. 3, the pipe fitting with strong pressure resistance further comprises a straight inner pipe 5 arranged inside the main pipe 1, and the straight inner pipe 5 is connected with the inner wall of the pipe body 2. When the pipe fitting in the present embodiment is used as a drain pipe, the straight inner pipe 5 makes the inner wall of the pipe fitting of the present embodiment smooth, effectively reducing the resistance of the inner wall of the pipe fitting to fluid.
Example 2
As shown in fig. 4 to 6, in this embodiment, the pipe with strong impact resistance further includes a straight outer pipe 6, the main pipe 1 is disposed inside the straight outer pipe 6, and the first crest 31 and the second crest 33 are connected to the inner wall of the straight outer pipe 6. The rugged reinforcing block 3 is easy to collect dirt and is inconvenient to clean. This embodiment allows the user to clean conveniently by providing a straight outer tube 6.
As shown in fig. 5 and 7, the pipe fitting with strong impact resistance comprises at least two pipe units 7 connected in sequence, all pipe units 7 comprise a main pipe 1 and a straight outer pipe 6, one end of the main pipe 1 is provided with a protruding part 11 protruding out of one end of the straight outer pipe 6, the periphery of the protruding part 11 protrudes to form a protruding block 111, the other end of the straight outer pipe 6 protrudes to form a connecting sleeve 61, the inner wall of the connecting sleeve 61 is provided with a first clamping block 62 and a second clamping block 63, the first clamping block 62 and the second clamping block 63 are distributed along the axial direction of the connecting sleeve 61, a clamping groove is formed between the first clamping block 62 and the second clamping block 63, the protruding part 11 in one pipe unit 7 is used for extending into the connecting sleeve 61 in the other pipe unit 7, and the protruding block 111 in the pipe unit 7 is used for being clamped with the clamping groove in the other pipe unit 7. When each pipe unit 7 needs to be connected, the protruding part 11 of one pipe unit 7 is inserted into the connecting sleeve 61 of the other pipe unit 7, and then one pipe unit 7 is rotated to enable the protruding block 111 to enter between the first clamping block 62 and the second clamping block 63, so that the protruding block 111 is connected with the clamping groove in a clamping mode, and connection between the two pipe units 7 is achieved.
As shown in fig. 5 and 7, the outer circumference of the protruding portion 11 is sleeved with a sealing ring 8, and the sealing ring 8 in one pipe unit 7 is used for abutting against the inner wall of the connecting sleeve 61 in the other pipe unit 7. Thereby improving the sealability between two adjacent pipe units 7.
Example 3
As shown in fig. 1-5, the main pipe 1 comprises the following raw materials in parts by weight:
The flame retardant is compounded by melamine polyphosphate, diethyl aluminum phosphinate and magnesium hydroxide according to the weight ratio of 1.5:3:2.
The smoke suppressant is prepared by compounding zinc borate, zinc aluminate and zinc molybdate according to the weight ratio of 1:4:8.
The anti-dripping agent is obtained by coating polytetrafluoroethylene on polycarbonate by adopting an emulsion polymerization method.
The surface modifier is an aluminate coupling agent.
The impact modifier is compounded by chlorinated polyethylene, ethylene-vinyl acetate copolymer and methyl methacrylate-butadiene-styrene copolymer in a weight ratio of 4:4:1.
The preparation method of the amide nucleating agent comprises the following steps: and (3) taking the amide alpha crystal form nucleating agent, melting for 6min at 225 ℃, and then quenching and recrystallizing in water to obtain the amide nucleating agent.
The preparation method of the main pipe 1 comprises the following steps:
(S1) weighing raw materials in parts by weight for later use;
(S2) mixing the flame retardant, the smoke suppressant and the surface modifier, and stirring for 8min at 900rpm to obtain a mixed filler;
And (S3) adding other raw materials into the mixed filler obtained in the step (S2), uniformly mixing, feeding into extrusion equipment under the protection of nitrogen for melt extrusion, granulating, and then injection molding the complete main pipe 1.
In the step (S3), the screw speed of the extrusion equipment is 90r/min, the temperature of a first area of the extrusion equipment is 185 ℃, the temperature of a second area of the extrusion equipment is 173 ℃, the temperature of a third area of the extrusion equipment is 178 ℃, the temperature of a fourth area of the extrusion equipment is 183 ℃, the temperature of a fifth area of the extrusion equipment is 188 ℃, and the temperature of a die head is 190 ℃.
Example 4
As shown in fig. 1-5, the main pipe 1 comprises the following raw materials in parts by weight:
The flame retardant is compounded by melamine polyphosphate, diethyl aluminum phosphinate and magnesium hydroxide according to the weight ratio of 1:2:1.
The smoke suppressant is prepared by compounding zinc borate, zinc aluminate and zinc molybdate according to the weight ratio of 1:2:8.
The anti-dripping agent is obtained by coating polytetrafluoroethylene on polycarbonate by adopting an emulsion polymerization method.
The surface modifier is titanate coupling agent.
The impact modifier is compounded by chlorinated polyethylene, ethylene-vinyl acetate copolymer and methyl methacrylate-butadiene-styrene copolymer in a weight ratio of 4:2:1.
The preparation method of the amide nucleating agent comprises the following steps: and (3) taking the amide alpha crystal form nucleating agent, melting for 5min at 220 ℃, quenching in water, and recrystallizing to obtain the amide nucleating agent.
The preparation method of the main pipe 1 comprises the following steps:
(S1) weighing raw materials in parts by weight for later use;
(S2) mixing the flame retardant, the smoke suppressant and the surface modifier, and stirring for 5min at the rotation speed of 800rpm to obtain a mixed filler;
And (S3) adding other raw materials into the mixed filler obtained in the step (S2), uniformly mixing, feeding into extrusion equipment under the protection of nitrogen for melt extrusion, granulating, and then injection molding the complete main pipe 1.
In the step (S3), the screw speed of the extrusion equipment is 60r/min, the temperature of a first area of the extrusion equipment is 180 ℃, the temperature of a second area of the extrusion equipment is 170 ℃, the temperature of a third area of the extrusion equipment is 175 ℃, the temperature of a fourth area of the extrusion equipment is 180 ℃, the temperature of a fifth area of the extrusion equipment is 185 ℃, and the temperature of a die head is 185 ℃.
Example 5
As shown in fig. 1-5, the main pipe 1 comprises the following raw materials in parts by weight:
The flame retardant is compounded by melamine polyphosphate, diethyl aluminum phosphinate and magnesium hydroxide in a weight ratio of 2:4:3.
The smoke suppressant is prepared by compounding zinc borate, zinc aluminate and zinc molybdate according to the weight ratio of 1:5:8.
The anti-dripping agent is obtained by coating polytetrafluoroethylene on polycarbonate by adopting an emulsion polymerization method.
The surface modifier is an aluminate coupling agent.
The impact modifier is compounded by chlorinated polyethylene, ethylene-vinyl acetate copolymer and methyl methacrylate-butadiene-styrene copolymer in a weight ratio of 4:5:1.
The preparation method of the amide nucleating agent comprises the following steps: and (3) taking the amide alpha crystal form nucleating agent, melting for 8min at 230 ℃, quenching in water, and recrystallizing to obtain the amide nucleating agent.
The preparation method of the main pipe 1 comprises the following steps:
(S1) weighing raw materials in parts by weight for later use;
(S2) mixing the flame retardant, the smoke suppressant and the surface modifier, and stirring for 10min at a rotating speed of 1000rpm to obtain a mixed filler;
And (S3) adding other raw materials into the mixed filler obtained in the step (S2), uniformly mixing, feeding into extrusion equipment under the protection of nitrogen for melt extrusion, granulating, and then injection molding the complete main pipe 1.
In the step (S3), the screw speed of the extrusion equipment is 120r/min, the temperature of a first area of the extrusion equipment is 190 ℃, the temperature of a second area of the extrusion equipment is 175 ℃, the temperature of a third area of the extrusion equipment is 180 ℃, the temperature of a fourth area of the extrusion equipment is 185 ℃, the temperature of a fifth area of the extrusion equipment is 190 ℃, and the temperature of a die head is 195 ℃.
Example 6
As shown in fig. 1-5, the main pipe 1 comprises the following raw materials in parts by weight:
The flame retardant is compounded by melamine polyphosphate, diethyl aluminum phosphinate and magnesium hydroxide according to the weight ratio of 1.8:2.8:1.8.
The smoke suppressant is zinc borate.
The anti-dripping agent is obtained by coating polytetrafluoroethylene on polycarbonate by adopting an emulsion polymerization method.
The surface modifier is titanate coupling agent.
The impact modifier is prepared by compounding chlorinated polyethylene and ethylene-vinyl acetate copolymer in a weight ratio of 1:1.
The preparation method of the amide nucleating agent comprises the following steps: and (3) taking the amide alpha crystal form nucleating agent, melting the amide alpha crystal form nucleating agent at 222 ℃ for 6min, and then quenching and recrystallizing the amide alpha crystal form nucleating agent in water to obtain the amide nucleating agent.
The preparation method of the main pipe 1 comprises the following steps:
(S1) weighing raw materials in parts by weight for later use;
(S2) mixing the flame retardant, the smoke suppressant and the surface modifier, and stirring for 6min at the rotating speed of 860rpm to obtain a mixed filler;
And (S3) adding other raw materials into the mixed filler obtained in the step (S2), uniformly mixing, feeding into extrusion equipment under the protection of nitrogen for melt extrusion, granulating, and then injection molding the complete main pipe 1.
In the step (S3), the screw speed of the extrusion equipment is 80r/min, the temperature of the first area of the extrusion equipment is 182 ℃, the temperature of the second area is 174 ℃, the temperature of the third area is 176 ℃, the temperature of the fourth area is 182 ℃, the temperature of the fifth area is 189 ℃, and the temperature of the die head is 192 ℃.
Comparative example 1
The difference between this comparative example and example 3 is that: the flame retardant is magnesium hydroxide.
Comparative example 2
The difference between this comparative example and example 3 is that: comparative example 2 does not contain an amide-based nucleating agent.
Comparative example 3
The difference between this comparative example and example 3 is that: the impact modifier is a methyl methacrylate-butadiene-styrene copolymer.
Example 7
The main pipe 1 prepared in examples 3 to 6 and comparative examples 1 to 3 was tested for tensile strength, impact strength, notched impact strength, flame retardancy and smoke density. The test method is as follows:
tensile strength test: the test was carried out at a temperature of 23.+ -. 2 ℃ in MPa according to the specification of GB/T1040-92.
Impact strength test: according to the specification of GB/T6112-1985, taking a main pipe 1, standing at the temperature of minus 5 ℃ for 8 hours, selecting a dropping weight B of 5kg, wherein the dropping height of the dropping weight B is 2m, and observing whether the main pipe 1 is broken.
Notched impact strength test: the notched impact strength in KJ/m 2 was tested using the GB/T1843-2008 test standard.
Flame retardancy test: the flame retardant rating was tested according to UL94 test method.
Smoke density testing: its maximum smoke density was tested according to the GB/T8627 standard.
The test results are shown in table 1 below:
TABLE 1
As shown in the table 1, the main pipe 1 of the invention has the tensile strength of 28-32MPa, the notch impact strength of 9-10.6KJ/m 2, the smoke density of 30-41, the flame retardant grade of U94 of V0 (0.8 mm) and higher low-temperature impact strength, tensile strength and low-smoke flame retardance.
Compared with the embodiment 3, the flame retardant of the comparative example 1 is only magnesium hydroxide, has lower flame retardant grade and poorer flame retardant effect, and the flame retardant prepared by compounding melamine polyphosphate, diethyl aluminum phosphinate and magnesium hydroxide in a weight ratio of 1-2:2-4:1-3 has remarkable flame retardant effect.
Compared with example 3, the comparative example 2 has no amide nucleating agent added, which reduces the tensile strength and obviously reduces the impact resistance.
The impact modifier of comparative example 3, which is only a methyl methacrylate-butadiene-styrene copolymer, has reduced impact resistance and tensile strength as compared with example 3, and the impact modifier of the present invention, which adopts at least two combinations of chlorinated polyethylene, ethylene-vinyl acetate copolymer and methyl methacrylate-butadiene-styrene copolymer, can promote the improvement of tensile strength and impact resistance of the main pipe 1.
The above embodiments are preferred embodiments of the present invention, and besides, the present invention may be implemented in other ways, and any obvious substitution is within the scope of the present invention without departing from the concept of the present invention.

Claims (8)

1. The utility model provides a pipe fitting that impact resistance is strong which characterized in that: the novel pipe comprises a main pipe (1), wherein the main pipe (1) comprises a pipe body (2) and a plurality of reinforcing blocks (3) sleeved on the periphery of the pipe body (2), a reinforcing ring (4) sleeved on the periphery of the pipe body (2) is arranged between two adjacent reinforcing blocks (3), the reinforcing blocks (3) comprise a first wave crest (31), a wave trough (32) and a second wave crest (33), one side of the first wave crest (31) is connected with the pipe body (2), the other side of the first wave crest (31) is connected with one side of the wave trough (32), one side of the second wave crest (33) is connected with the other side of the wave trough (32), and the other side of the second wave crest (33) is connected with the pipe body (2);
the main pipe (1) comprises the following raw materials in parts by weight:
The preparation method of the main pipe (1) comprises the following steps:
(S1) weighing raw materials in parts by weight for later use;
(S2) mixing the flame retardant, the smoke suppressant and the surface modifier, and stirring for 5-10min at the rotation speed of 800-1000rpm to obtain a mixed filler;
And (S3) adding other raw materials into the mixed filler obtained in the step (S2), uniformly mixing, feeding into extrusion equipment under the protection of nitrogen for melt extrusion, granulating, and then injection molding the complete main pipe (1).
2. A strong impact pressure resistant pipe fitting according to claim 1, wherein: longitudinal sections of the pipe body (2), the first wave crest (31), the wave trough (32) and the second wave trough (32) are all round.
3. A strong impact pressure resistant pipe fitting according to claim 1, wherein: the first crest (31) comprises a first inclined surface section (311), a flat section (312) and a second inclined surface section (313), one end of the first inclined surface section (311) is connected with the pipe body (2), the other end of the first inclined surface section (311) is connected with one end of the flat section (312), one end of the second inclined surface section (313) is connected with one end of the flat section (312), and the other end of the second inclined surface section (313) is connected with the trough (32).
4. A strong impact resistant pipe fitting according to claim 3, wherein: rounded corners (34) are arranged between the first inclined surface section and the flat section (312) and between the second inclined surface section (313) and the flat section (312).
5. A strong impact pressure resistant pipe fitting according to claim 1, wherein: the pipe fitting with strong anti-pressure capability further comprises a straight inner pipe (5) arranged in the main pipe (1), and the straight inner pipe (5) is connected with the inner wall of the pipe body (2).
6. A strong impact pressure resistant pipe fitting according to claim 1, wherein: the pipe fitting that anti-pressure ability is strong still includes straight outer tube (6), be responsible for (1) setting in the inside of straight outer tube (6), first crest (31) and second crest (33) are all connected with the inner wall of straight outer tube (6).
7. A high impact pressure resistant pipe fitting as defined in claim 6, wherein: the pipe fitting that anti-pressure ability is strong is including two at least pipe units (7) that connect gradually, all pipe units (7) all include be responsible for (1) and straight outer tube (6), the one end of being responsible for (1) is equipped with and stretches out outside bulge (11) of straight outer tube (6) one end, the periphery bulge of bulge (11) is formed with lug (111), the other end bulge of straight outer tube (6) is formed with adapter sleeve (61), the inner wall of adapter sleeve (61) is equipped with first fixture block (62) and second fixture block (63), and the axial of adapter sleeve (61) is arranged along first fixture block (62) and second fixture block (63), is formed with the draw-in groove between first fixture block (62) and second fixture block (63), and bulge (11) in one pipe unit (7) are used for stretching into adapter sleeve (61) in another pipe unit (7), lug (111) in pipe unit (7) be used for with draw-in groove joint in another pipe unit (7).
8. A high impact pressure resistant pipe fitting as defined in claim 7, wherein: the periphery of the protruding part (11) is sleeved with a sealing ring (8), and the sealing ring (8) in one pipe unit (7) is used for abutting against the inner wall of the connecting sleeve (61) in the other pipe unit (7).
CN201910619919.1A 2019-07-10 2019-07-10 Pipe fitting with strong anti-impact capability Active CN110410617B (en)

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CN112398076B (en) * 2020-12-10 2022-12-30 广东安恒塑业有限公司 Buried high-strength pressure-resistant power cable protection sleeve and protection sleeve assembly thereof

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CN107366783A (en) * 2016-05-12 2017-11-21 无锡麟达新型管道科技有限公司 Double muscle strengthen sewage dedicated pipe inside and outside HDPE
CN108194743A (en) * 2017-12-17 2018-06-22 湖北水之翼科技有限公司 M types electric heating melting enhances bellows
CN207921515U (en) * 2018-01-17 2018-09-28 江苏鲁宁管业科技有限公司 High-density polyethylene carbon tube
CN207961763U (en) * 2018-01-13 2018-10-12 浙江万华不锈钢有限公司 A kind of corrosion resistant stainless steel tube
CN210600681U (en) * 2019-07-10 2020-05-22 张绍梅 Pipe fitting with strong anti-impact pressure capability

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN203656389U (en) * 2013-08-21 2014-06-18 周成立 Novel double-wall corrugated pipe provided with square outside and round inside
CN203517041U (en) * 2013-10-22 2014-04-02 福建和盛塑业有限公司 Enhanced double-wall corrugated pipe
CN204387516U (en) * 2015-01-12 2015-06-10 山东汇晟管业有限公司 A kind of high ring rigidity bellows
CN107366783A (en) * 2016-05-12 2017-11-21 无锡麟达新型管道科技有限公司 Double muscle strengthen sewage dedicated pipe inside and outside HDPE
CN108194743A (en) * 2017-12-17 2018-06-22 湖北水之翼科技有限公司 M types electric heating melting enhances bellows
CN207961763U (en) * 2018-01-13 2018-10-12 浙江万华不锈钢有限公司 A kind of corrosion resistant stainless steel tube
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CN210600681U (en) * 2019-07-10 2020-05-22 张绍梅 Pipe fitting with strong anti-impact pressure capability

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