CN112212106B - Rotary universal joint - Google Patents
Rotary universal joint Download PDFInfo
- Publication number
- CN112212106B CN112212106B CN202010877817.2A CN202010877817A CN112212106B CN 112212106 B CN112212106 B CN 112212106B CN 202010877817 A CN202010877817 A CN 202010877817A CN 112212106 B CN112212106 B CN 112212106B
- Authority
- CN
- China
- Prior art keywords
- pipe
- parts
- joint
- connecting pipe
- side wall
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L47/00—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics
- F16L47/18—Adjustable joints; Joints allowing movement
-
- 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
-
- 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
- C08K3/02—Elements
- C08K3/08—Metals
- C08K2003/0806—Silver
-
- 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
- C08K2201/011—Nanostructured additives
-
- 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
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/06—Properties of polyethylene
- C08L2207/062—HDPE
Abstract
The invention relates to the technical field of pipe fittings, in particular to a rotary universal joint which comprises a first connecting pipe and a second connecting pipe communicated with the first connecting pipe, wherein the first connecting pipe comprises a first pipe body and a female joint obliquely connected to one end of the first pipe body, the second connecting pipe comprises a second pipe body and a sub-joint obliquely connected to one end of the second pipe body, and the outer side wall of the sub-joint is rotationally abutted against the inner side wall of the female joint. Connecting the female joint to one end of the first pipe body in an inclined manner, connecting the sub joint to one end of the second pipe body in an inclined manner, and enabling the outer side wall of the sub joint to abut against the inner side wall of the female joint in a rotating manner; when the pipe fitting is used, the first pipe body and the second pipe body are screwed to enable the sub-joint and the female joint to be matched and rotated, the size of an included angle between the first connecting pipe and the second connecting pipe can be changed, and more angles are provided for being adaptive to pipe fitting connection.
Description
Technical Field
The invention relates to the technical field of cable protection pipe fittings, in particular to a rotary universal joint.
Background
Generally, two pipes with the same diameter are connected in a straight line, and if the pipe needs to change direction, a joint with a fixed bending angle is also needed. At present, the joints are divided into standard joints such as 90-degree joints or 45-degree joints for connection; however, no more angled joints are suitable for connecting with the pipe elements due to construction errors or building design reasons.
Disclosure of Invention
In order to overcome the disadvantages and shortcomings of the prior art, the present invention is directed to a rotary universal joint providing more angles.
The purpose of the invention is realized by the following technical scheme: the utility model provides a rotary universal joint, includes first takeover and takes over the second of intercommunication with first takeover, first takeover includes first body and the female joint of slope connection in the one end of first body, the second is taken over and is included second body and the sub-joint of slope connection in the one end of second body, the lateral wall of sub-joint rotatory support lean on in the inside wall of female joint.
Preferably, the female joint include with the female seat of annular that first body is connected and connect in the stopper of the inside wall of the female seat of annular, the sub-joint include with the annular subblock that the second body is connected and extend the convex ridge of the lateral wall of annular subblock, the convex ridge is rotatory to be supported in the inside wall of the female seat of annular, the stopper is used for the restriction the axial displacement of convex ridge.
Preferably, the number of the limiting blocks is 4, and the 4 limiting blocks are uniformly distributed on the inner side wall of the annular female seat.
Preferably, the outer side wall of the raised ridge is provided with an annular groove.
Preferably, the first connecting pipe further comprises a first corrugated pipe, one end of the first corrugated pipe is connected with the first pipe body, and a first connecting part extends from the other end of the first corrugated pipe; the second connecting pipe further comprises a second corrugated pipe, one end of the second corrugated pipe is connected with the second pipe body, and a second connecting portion extends from the other end of the second corrugated pipe.
Preferably, the outer circumference of the first bellows and the outer circumference of the second bellows are square and each corner recess forms a fillet.
Preferably, the first connecting pipe and the second connecting pipe are both integrally injection-molded by the high-impact modified polypropylene composite material.
Preferably, the high impact modified polypropylene composite material comprises the following raw materials in parts by weight:
100 portions of polypropylene
10-20 parts of high-density polyethylene
10-20 parts of modified inorganic substance
5-10 parts of glass fiber
8-15 parts of flame retardant
1-3 parts of coupling agent
5-8 parts of compatilizer
0.5-1.5 parts of antioxidant.
Preferably, the preparation method of each part of the modified inorganic substance comprises the following steps:
(A1) taking 30-40 parts of porous adsorption inorganic powder, 5-10 parts of nano silver powder, 1-2 parts of dispersing agent and 100 parts of ethanol according to parts by weight for later use;
(A2) sequentially adding a dispersing agent, porous adsorption inorganic substance powder and nano silver powder into ethanol under the stirring condition, and then stirring at a high speed of 1000-1800r/min for 1-3h to obtain a suspension;
(A3) and (C) drying the suspension obtained in the step (A2) at the temperature of 60 ℃, and then grinding into powder to obtain the modified inorganic substance.
Preferably, the preparation method of the high impact modified polypropylene composite material comprises the following steps:
(S1) taking polypropylene, high-density polyethylene, modified inorganic matters, glass fibers, flame retardants, coupling agents, compatilizers and antioxidants according to parts by weight for later use;
(S2) mixing the modified inorganic substance, the glass fiber and the coupling agent for 1-2h to obtain a premix;
(S3) uniformly stirring the polypropylene, the high-density polyethylene, the flame retardant, the compatilizer, the antioxidant and the premix obtained in the step (S2), and then melting, extruding and granulating through a double-screw extruder to obtain the high-impact modified polypropylene composite material.
The invention has the beneficial effects that: according to the rotary universal joint, the female joint is obliquely connected to one end of the first pipe body, the sub-joint is obliquely connected to one end of the second pipe body, and the outer side wall of the sub-joint is rotatably abutted against the inner side wall of the female joint; when the pipe fitting is used, the first pipe body and the second pipe body are screwed to enable the sub-joint and the female joint to be matched and rotated, the size of an included angle between the first connecting pipe and the second connecting pipe can be changed, and more angles are provided for being adaptive to pipe fitting connection.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is an exploded schematic view of the present invention;
FIG. 3 is a schematic structural view from another perspective of the present invention;
FIG. 4 is a cross-sectional view A-A of FIG. 3;
fig. 5 is a schematic structural view of the present invention after screwing the first pipe and the second pipe.
The reference signs are: 1. a first adapter tube; 11. a first pipe body; 12. a female joint; 121. an annular female seat; 122. a limiting block; 13. a first bellows; 2. a second adapter tube; 21. a second tube body; 22. a sub-junction; 221. a ring sub-block; 222. a raised ridge; 23. a second bellows; 3. an annular groove; 4. a first connection portion; 5. a second connecting portion; 6. a fillet.
Detailed Description
In order to facilitate understanding of those skilled in the art, the present invention is further described below with reference to examples and drawings, and the content of the embodiments is not intended to limit the present invention.
As shown in fig. 1 to 5, a rotary universal joint includes a first connection pipe 1 and a second connection pipe 2 communicated with the first connection pipe 1, wherein the first connection pipe 1 includes a first pipe body 11 and a female joint 12 obliquely connected to one end of the first pipe body 11, the second connection pipe 2 includes a second pipe body 21 and a male joint 22 obliquely connected to one end of the second pipe body 21, and an outer side wall of the male joint 22 rotatably abuts against an inner side wall of the female joint 12.
The rotary universal joint connects the female joint 12 to one end of the first pipe 11 in an inclined way, connects the sub-joint 22 to one end of the second pipe 21 in an inclined way, and the outer side wall of the sub-joint 22 is in rotary support against the inner side wall of the female joint 12; when the pipe fitting is used, the first pipe body 11 and the second pipe body 21 are screwed to enable the sub-connector 22 and the female connector 12 to be matched and rotated, the size of an included angle between the first connecting pipe 1 and the second connecting pipe 2 can be changed, and more angles are provided for being matched with pipe fittings. Further, the first connecting pipe 1 is of an integrated structure, and the second connecting pipe 2 is of an integrated structure.
In one embodiment, the female joint 12 includes an annular female seat 121 connected to the first pipe 11 and a stop block 122 connected to an inner side wall of the annular female seat 121, the female joint 22 includes an annular sub-block 221 connected to the second pipe 21 and a raised ridge 222 extending from an outer side wall of the annular sub-block 221, the raised ridge 222 rotates against the inner side wall of the annular female seat 121, and the stop block 122 is configured to limit axial movement of the raised ridge 222.
By adopting the technical scheme, when in use, the first pipe body 11 and the second pipe body 21 are screwed to enable the inner side wall of the annular female seat 121 to be matched and rotated with the outer wall of the convex ridge 222, so that the size of an included angle between the first connecting pipe 1 and the second connecting pipe 2 can be changed, and more angles are provided for adapting to pipe connection; meanwhile, the additional limiting block 122 limits the axial movement of the raised ridge 222, and the first connecting pipe 1 and the second connecting pipe 2 are prevented from being separated by screwing the first pipe 11 and the second pipe 21. In this embodiment, the limiting block 122 is disposed on the inner sidewall of the annular female seat 121 and is far away from the first pipe 11.
In one embodiment, the number of the limiting blocks 122 is 4, and the 4 limiting blocks 122 are uniformly distributed on the inner side wall of the annular female seat 121.
By adopting the above technical solution, the stability of the limiting block 122 is improved, the axial movement of the protruding ridge 222 is more stably limited, and the first connecting pipe 1 and the second connecting pipe 2 are prevented from being separated by screwing the first pipe 11 and the second pipe 21.
In one embodiment, the outer side wall of the ridge 222 is provided with an annular groove 3.
By adopting the technical scheme, the convex ridge 222 is divided into two checkpoints, so that raw materials are saved, and the stability is ensured.
In one embodiment, the first adapter tube 1 further comprises a first bellows 13, one end of the first bellows 13 is connected to the first tube 11, and the other end of the first bellows 13 extends to form a first connection portion 4; the second connecting pipe 2 further comprises a second corrugated pipe 23, one end of the second corrugated pipe 23 is connected with the second pipe body 21, and a second connecting part 5 extends from the other end of the second corrugated pipe 23.
By adopting the technical scheme, in actual use, the first connecting part 4 extended by the first corrugated pipe 13 is connected with a pipe fitting, the second connecting part 5 extended by the second corrugated pipe 23 is connected with another pipe fitting, and the impact resistance of the first corrugated pipe 13 and the second corrugated pipe 23 can be improved by utilizing the corrugated structures of the first corrugated pipe 13 and the second corrugated pipe 23; in addition, because the appearance of the first corrugated pipe 13 and the appearance of the second corrugated pipe 23 are both square, the pipe pillow is not needed to be used for fixing during installation and construction, the workload is greatly reduced, pipe pillow equipment is saved, and the construction cost is reduced.
In one embodiment, the outer perimeter of the first bellows 13 and the outer perimeter of the second bellows 23 are square and each corner recess forms a fillet 6.
By adopting the technical scheme, the inner fillets 6 are formed by utilizing the structures of the first corrugated pipe 13 and the second corrugated pipe 23 and the depression of each corner, so that the pressure resistance of the anti-impact reinforcing rib is improved, and the pressure resistance of the whole first corrugated pipe 13 and the whole second corrugated pipe 23 in the vertical direction is also improved.
In one embodiment, the first adapter tube and the second adapter tube are both integrally injection molded from a high impact modified polypropylene composite.
By adopting the technical scheme, the special structure of the rotary universal joint is combined, the impact strength of the rotary universal joint is improved, the rotary universal joint can be normally used under the severe weather condition, the higher strength is guaranteed to be beaten without breaking, the service life is prolonged, and the rotary universal joint is particularly suitable for protecting pipe fittings of cables.
In one embodiment, the high impact modified polypropylene composite comprises the following raw materials in parts by weight:
100 parts of polypropylene
10-20 parts of high-density polyethylene
10-20 parts of modified inorganic substance
5-10 parts of glass fiber
8-15 parts of flame retardant
1-3 parts of coupling agent
5-8 parts of compatilizer
0.5-1.5 parts of antioxidant.
By adopting the technical scheme, the high-impact modified polypropylene composite material prepared by taking polypropylene as a main resin and adding the high-density polyethylene, the modified inorganic substance, the glass fiber, the flame retardant, the coupling agent, the compatilizer, the antioxidant and other auxiliaries is modified, has excellent compressive strength, impact strength, tensile strength, heat aging resistance, flame retardance and antibacterial property, and the service life of the rotary universal joint prepared from the high-impact modified polypropylene composite material is prolonged.
In one embodiment, the method for preparing each part of the modified inorganic substance comprises the following steps:
(A1) taking 30-40 parts of porous adsorption inorganic powder, 5-10 parts of nano silver powder, 1-2 parts of dispersing agent and 100 parts of ethanol according to parts by weight for later use;
(A2) sequentially adding a dispersing agent, porous adsorption inorganic substance powder and nano silver powder into ethanol under the stirring condition, and then stirring at a high speed of 1000-1800r/min for 1-3h to obtain a suspension;
(A3) and (C) drying the suspension obtained in the step (A2) at the temperature of 60 ℃, and then grinding into powder to obtain the modified inorganic substance.
By adopting the technical scheme, ethanol is used as an adsorption medium, the dispersing agent is added to promote the porous adsorption inorganic substance powder and the nano silver powder to disperse, then under the action of high-speed stirring, the nano silver powder can permeate into the porous adsorption inorganic substance powder due to pressure difference, so that the nano silver powder has the thermal decomposition resistance of inorganic substances, plays a role in enhancing after being added into the high-impact modified polypropylene composite material, and has the antibacterial effect of the nano silver powder to avoid microbial corrosion. The porous adsorbed inorganic powder is used as a carrier to adsorb the nano silver powder, so that the phenomenon that the nano silver powder is agglomerated in the process of preparing the high-impact-resistance modified polypropylene composite material to reduce the antibacterial effect and cause adverse effects on the mechanical properties is avoided. And (A3) drying at 60 ℃, volatilizing ethanol, agglomerating, grinding into powder, and obtaining the modified inorganic substance with the particle size of 30-80 μm. Preferably, the porous adsorption inorganic substance is at least one of zeolite, diatomite and white carbon black.
In one embodiment, the polypropylene is a block co-polypropylene; the melt index of the block copolymerization polypropylene under the conditions of 230 ℃ and 2.16kg is 18-30g/10 min; the weight average molecular weight of the high-density polyethylene is 80000-100000. The block copolymerization polypropylene has good compatibility with high density polyethylene, excellent electrical insulation after compatibility, good heat resistance and cold resistance, good chemical stability, higher rigidity and toughness and reinforcing effect, and can still keep certain toughness at low temperature.
In one embodiment, the glass fibers have a filament diameter of 8-15 μm; the composite material has obviously raised mechanical performance, including tensile strength, compression strength, rigidity, etc. and high weather resistance, heat oxidation resistance, light oxidation resistance and size stability, and has excellent toughness owing to the strictly controlled glass fiber consumption of 5-10 weight portions and monofilament diameter of 8-15 microns.
In one embodiment, the flame retardant is bisphenol a-bis (diphenyl phosphate) or resorcinol bis (diphenyl phosphate); has halogen-free flame retardant effect.
In one embodiment, the coupling agent is isopropyldioleacyloxy (dioctylphosphato) titanate or bis (dioctyloxypyrophosphate) ethylene titanate; the compatilizer is ethylene-methyl acrylate copolymer. The coupling agent and the compatilizer are adopted to jointly act, so that the compatibility between organic matters and inorganic matters and between the organic matters and the organic matters is improved, the tensile strength, the impact strength and the aging resistance of the high-impact-resistance modified polypropylene composite material are improved, and the surface smoothness is good.
In one embodiment, the antioxidant is at least one of antioxidant 1010, antioxidant 1076, and antioxidant 168. The antioxidant is adopted to improve the oxidation resistance of the composite material, prevent the composite material from yellowing after overlong use time, and improve the mechanical stability of the composite material.
In one embodiment, the preparation method of the high impact modified polypropylene composite material comprises the following steps:
(S1) taking polypropylene, high-density polyethylene, modified inorganic matters, glass fibers, flame retardants, coupling agents, compatilizers and antioxidants according to parts by weight for later use;
(S2), mixing the modified inorganic substance, the glass fiber and the coupling agent for 1-2h to obtain a premix;
(S3) uniformly stirring the polypropylene, the high-density polyethylene, the flame retardant, the compatilizer, the antioxidant and the premix obtained in the step (S2), and then melting, extruding and granulating through a double-screw extruder to obtain the high-impact modified polypropylene composite material.
The preparation method for preparing the high-impact modified polypropylene composite material 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 modified inorganic substance, the glass fiber and the coupling agent are mixed to activate the modified inorganic substance and the glass fiber, thereby increasing the filling amount, reducing the use amount of polypropylene and high density polyethylene, reducing the cost, improving the processability, increasing the gloss of the product and improving the quality.
In one embodiment, the screw speed of the twin-screw extruder is 60 to 120r/min, and the length-diameter ratio of the twin-screw extruder is 20 to 30: 1, the temperature of each zone of the double-screw extruder is respectively as follows: the first zone temperature is 170-.
Example 1
As shown in fig. 1 to 5, a rotary universal joint includes a first connection pipe 1 and a second connection pipe 2 communicated with the first connection pipe 1, wherein the first connection pipe 1 includes a first pipe body 11 and a female joint 12 obliquely connected to one end of the first pipe body 11, the second connection pipe 2 includes a second pipe body 21 and a male joint 22 obliquely connected to one end of the second pipe body 21, and an outer side wall of the male joint 22 rotatably abuts against an inner side wall of the female joint 12.
In this embodiment, the first adapter tube 1 is of an integral structure, and the second adapter tube 2 is of an integral structure.
In this embodiment, the female joint 12 includes an annular female seat 121 connected to the first pipe 11 and a stop block 122 connected to an inner side wall of the annular female seat 121, the female joint 22 includes an annular sub-block 221 connected to the second pipe 21 and a raised ridge 222 extending from an outer side wall of the annular sub-block 221, the raised ridge 222 is rotatably abutted against the inner side wall of the annular female seat 121, and the stop block 122 is configured to limit axial movement of the raised ridge 222.
In this embodiment, the limiting block 122 is disposed on the inner sidewall of the annular female seat 121 and is far away from the first pipe 11.
In this embodiment, the number of the limiting blocks 122 is 4, and the 4 limiting blocks 122 are uniformly distributed on the inner side wall of the annular female seat 121.
In this embodiment, the outer side wall of the ridge 222 is provided with an annular groove 3.
In this embodiment, the first adapter tube 1 further includes a first bellows 13, one end of the first bellows 13 is connected to the first tube 11, and the other end of the first bellows 13 extends to form a first connection portion 4; the second connecting pipe 2 further comprises a second corrugated pipe 23, one end of the second corrugated pipe 23 is connected with the second pipe body 21, and a second connecting part 5 extends from the other end of the second corrugated pipe 23.
In the present embodiment, the outer circumference of the first bellows 13 and the outer circumference of the second bellows 23 are square and the respective corner recesses form the fillet 6.
Example 2
This example differs from example 1 in that:
the first connecting pipe and the second connecting pipe are both integrally formed by injection molding of a high-impact modified polypropylene composite material.
Preferably, the high impact modified polypropylene composite material comprises the following raw materials in parts by weight:
100 portions of polypropylene
15 portions of high-density polyethylene
15 portions of modified inorganic matter
Glass fiber 8 parts
6 portions of compatilizer
And 1 part of antioxidant.
The preparation method of each part of the modified inorganic matter comprises the following steps:
(A1) taking 35 parts of porous adsorption inorganic powder, 8 parts of nano silver powder, 1.5 parts of dispersing agent and 100 parts of ethanol in parts by weight for later use;
(A2) sequentially adding a dispersing agent, porous adsorption inorganic substance powder and nano silver powder into ethanol under the stirring condition, and then stirring at a high speed of 1500r/min for 2 hours to obtain a suspension;
(A3) and (C) drying the suspension obtained in the step (A2) at the temperature of 60 ℃, and then grinding into powder to obtain the modified inorganic substance.
The particle size of the modified inorganic matter is 50 mu m, the particle size of the nano silver powder is 80nm, and the porous adsorption inorganic matter is zeolite.
The polypropylene is block copolymerization polypropylene; the melt index of the block copolymerization polypropylene under the conditions of 230 ℃ and 2.16kg is 25g/10 min; the high density polyethylene had a weight average molecular weight of 90000.
The monofilament diameter of the glass fiber is 12 mu m; the flame retardant is bisphenol A-bis (diphenyl phosphate).
The coupling agent is isopropyl dioleic acid acyloxy (dioctyl phosphate acyloxy) titanate; the compatilizer is an ethylene-methyl acrylate copolymer, and the types are as follows: dupont 1224 AC.
The antioxidant is antioxidant 1010.
The preparation method of the high impact modified polypropylene composite material comprises the following steps:
(S1) taking polypropylene, high-density polyethylene, modified inorganic matters, glass fibers, flame retardants, coupling agents, compatilizers and antioxidants according to parts by weight for later use;
(S2), mixing the modified inorganic substance, the glass fiber and the coupling agent for 1.5h to obtain a premix;
(S3) uniformly stirring the polypropylene, the high-density polyethylene, the flame retardant, the compatilizer, the antioxidant and the premix obtained in the step (S2), and then melting, extruding and granulating through a double-screw extruder to obtain the high-impact modified polypropylene composite material.
The screw rotating speed of the double-screw extruder is 90r/min, and the length-diameter ratio of the double-screw extruder is 25: 1, the temperatures of all zones of the double-screw extruder are respectively as follows: the first zone temperature was 173 ℃, the second zone temperature was 178 ℃, the third zone temperature was 183 ℃, the fourth zone temperature was 195 ℃, the fifth zone temperature was 188 ℃ and the die temperature was 190 ℃.
Example 3
This example differs from example 1 in that:
the first connecting pipe and the second connecting pipe are both integrally formed by injection molding of a high-impact modified polypropylene composite material.
Preferably, the high impact modified polypropylene composite material comprises the following raw materials in parts by weight:
100 portions of polypropylene
10 portions of high-density polyethylene
10 portions of modified inorganic matter
5 parts of glass fiber
8 portions of flame retardant
1 part of coupling agent
5 portions of compatilizer
0.5 part of antioxidant.
The preparation method of each part of the modified inorganic matter comprises the following steps:
(A1) taking 30 parts of porous adsorption inorganic powder, 5 parts of nano silver powder, 1 part of dispersing agent and 100 parts of ethanol according to parts by weight for later use;
(A2) sequentially adding a dispersing agent, porous adsorption inorganic substance powder and nano silver powder into ethanol under the stirring condition, and then stirring at a high speed of 1000r/min for 3 hours to obtain a suspension;
(A3) and (C) drying the suspension obtained in the step (A2) at the temperature of 60 ℃, and then grinding into powder to obtain the modified inorganic substance.
The particle size of the modified inorganic substance is 30 micrometers, the particle size of the nano silver powder is 50nm, and the porous adsorption inorganic substance is diatomite.
The polypropylene is block copolymerization polypropylene; the melt index of the block copolymerization polypropylene under the conditions of 230 ℃ and 2.16kg is 18g/10 min; the weight average molecular weight of the high-density polyethylene is 80000.
The monofilament diameter of the glass fiber is 8 mu m; the flame retardant is resorcinol bis (diphenyl phosphate).
The coupling agent is bis (dioctyloxy pyrophosphate) ethylene titanate; the compatilizer is an ethylene-methyl acrylate copolymer, and the types are as follows: dupont 2116 AC.
The antioxidant is an antioxidant 1076.
The preparation method of the high impact modified polypropylene composite material comprises the following steps:
(S1) taking polypropylene, high-density polyethylene, modified inorganic matters, glass fibers, flame retardants, coupling agents, compatilizers and antioxidants according to parts by weight for later use;
(S2) mixing the modified inorganic substance, the glass fiber and the coupling agent for 1h to obtain a premix;
(S3) uniformly stirring the polypropylene, the high-density polyethylene, the flame retardant, the compatilizer, the antioxidant and the premix obtained in the step (S2), and then melting, extruding and granulating through a double-screw extruder to obtain the high-impact modified polypropylene composite material.
The screw rotating speed of the double-screw extruder is 60r/min, and the length-diameter ratio of the double-screw extruder is 30: 1, the temperature of each zone of the double-screw extruder is respectively as follows: the first zone temperature was 170 ℃, the second zone temperature was 175 ℃, the third zone temperature was 180 ℃, the fourth zone temperature was 190 ℃, the fifth zone temperature was 185 ℃ and the die temperature was 185 ℃.
Example 4
This example differs from example 1 in that:
the first connecting pipe and the second connecting pipe are both integrally formed by injection molding of a high-impact modified polypropylene composite material.
Preferably, the high impact modified polypropylene composite material comprises the following raw materials in parts by weight:
100 parts of polypropylene
20 portions of high-density polyethylene
20 portions of modified inorganic substance
Glass fiber 10 parts
15 portions of flame retardant
8 portions of compatilizer
1.5 parts of antioxidant.
The preparation method of each part of the modified inorganic matter comprises the following steps:
(A1) taking 40 parts of porous adsorption inorganic powder, 10 parts of nano silver powder, 2 parts of dispersing agent and 100 parts of ethanol according to parts by weight for later use;
(A2) sequentially adding a dispersing agent, porous adsorption inorganic substance powder and nano silver powder into ethanol under the stirring condition, and then stirring at a high speed of 1800r/min for 1h to obtain a suspension;
(A3) and (C) drying the suspension obtained in the step (A2) at the temperature of 60 ℃, and then grinding into powder to obtain the modified inorganic substance.
The particle size of the modified inorganic substance is 80 mu m, the particle size of the nano silver powder is 100nm, and the porous adsorption inorganic substance is white carbon black.
The polypropylene is block copolymerization polypropylene; the melt index of the block copolymerization polypropylene under the conditions of 230 ℃ and 2.16kg is 30g/10 min; the high density polyethylene has a weight average molecular weight of 100000.
The monofilament diameter of the glass fiber is 15 mu m; the flame retardant is bisphenol A-bis (diphenyl phosphate).
The coupling agent is bis (dioctyloxy pyrophosphate) ethylene titanate; the compatilizer is an ethylene-methyl acrylate copolymer, and the types are as follows: dupont 1609 AC.
The antioxidant is 1010.
The preparation method of the high impact modified polypropylene composite material comprises the following steps:
(S1) taking polypropylene, high-density polyethylene, modified inorganic matters, glass fibers, flame retardants, coupling agents, compatilizers and antioxidants according to parts by weight for later use;
(S2), mixing the modified inorganic substance, the glass fiber and the coupling agent for 2 hours to obtain a premix;
(S3) uniformly stirring the polypropylene, the high-density polyethylene, the flame retardant, the compatilizer, the antioxidant and the premix obtained in the step (S2), and then melting, extruding and granulating through a double-screw extruder to obtain the high-impact modified polypropylene composite material.
The rotating speed of the screws of the double-screw extruder is 120r/min, and the length-diameter ratio of the double-screw extruder is 20: 1, the temperature of each zone of the double-screw extruder is respectively as follows: the first zone temperature was 175 deg.C, the second zone temperature was 180 deg.C, the third zone temperature was 185 deg.C, the fourth zone temperature was 200 deg.C, the fifth zone temperature was 190 deg.C, and the die temperature was 195 deg.C.
Example 5
The present example differs from example 1 in that:
the first connecting pipe and the second connecting pipe are both integrally formed by injection molding of a high-impact modified polypropylene composite material.
Preferably, the high impact modified polypropylene composite material comprises the following raw materials in parts by weight:
100 portions of polypropylene
18 portions of high-density polyethylene
12 portions of modified inorganic matter
6 parts of glass fiber
10 portions of flame retardant
1.5 parts of coupling agent
7 portions of compatilizer
0.8 part of antioxidant.
The preparation method of each part of the modified inorganic matter comprises the following steps:
(A1) 38 parts of porous adsorption inorganic powder, 6 parts of nano silver powder, 1.8 parts of dispersing agent and 100 parts of ethanol are taken according to parts by weight for later use;
(A2) sequentially adding a dispersing agent, porous adsorption inorganic substance powder and nano silver powder into ethanol under the stirring condition, and then stirring at a high speed of 1200r/min for 1.5h to obtain a suspension;
(A3) and (C) drying the suspension obtained in the step (A2) at the temperature of 60 ℃, and then grinding into powder to obtain the modified inorganic substance.
The particle size of the modified inorganic substance is 60 mu m, the particle size of the nano silver powder is 80nm, and the porous adsorption inorganic substance is zeolite and white carbon black according to the weight ratio of 1: 1 and mixing.
The polypropylene is block copolymerization polypropylene; the melt index of the block copolymerization polypropylene under the conditions of 230 ℃ and 2.16kg is 20g/10 min; the high density polyethylene had a weight average molecular weight of 95000.
The monofilament diameter of the glass fiber is 10 mu m; the flame retardant is bisphenol A-bis (diphenyl phosphate).
The coupling agent is isopropyl dioleic acid acyloxy (dioctyl phosphate acyloxy) titanate; the compatilizer is an ethylene-methyl acrylate copolymer, and the types are as follows: dupont 1224 AC.
The antioxidant is prepared from the following components in parts by weight of 1010 antioxidant and 168 antioxidant in a ratio of 3: 1 are mixed.
The preparation method of the high impact modified polypropylene composite material comprises the following steps:
(S1) taking polypropylene, high-density polyethylene, modified inorganic matters, glass fibers, flame retardants, coupling agents, compatilizers and antioxidants according to parts by weight for later use;
(S2), mixing the modified inorganic substance, the glass fiber and the coupling agent for 1.8h to obtain a premix;
(S3) uniformly stirring the polypropylene, the high-density polyethylene, the flame retardant, the compatilizer, the antioxidant and the premix obtained in the step (S2), and then melting, extruding and granulating through a double-screw extruder to obtain the high-impact modified polypropylene composite material.
The screw rotating speed of the double-screw extruder is 100r/min, the length-diameter ratio of the double-screw extruder is 28: 1, the temperatures of all zones of the double-screw extruder are respectively as follows: the first zone temperature was 174 ℃, the second zone temperature was 178 ℃, the third zone temperature was 182 ℃, the fourth zone temperature was 192 ℃, the fifth zone temperature was 190 ℃ and the die temperature was 190 ℃.
Comparative example 1
This comparative example differs from example 2 in that:
in the high-impact modified polypropylene composite material, 15 parts by weight of modified inorganic matters are replaced by 11.5 parts by weight of porous adsorption inorganic matter powder, 2.8 parts by weight of nano silver powder and 0.6 part by weight of dispersing agent; and (S3) uniformly stirring the polypropylene, the high-density polyethylene, the compatilizer, the antioxidant, the porous adsorbed inorganic substance powder, the flame retardant, the nano silver powder and the dispersing agent, and then melting, extruding and granulating the mixture by using a double-screw extruder to obtain the high-impact modified polypropylene composite material.
Comparative example 2
This comparative example differs from example 2 in that:
the dosage of the modified inorganic matter is 0.
Comparative example 3
This comparative example differs from example 2 in that:
the compatilizer is ethylene bis stearamide.
Comparative example 4
This comparative example differs from example 2 in that:
the high-density polyethylene is replaced by low-density polyethylene, and the types are as follows: 2426F
Example 6
The composite materials of examples 2-5 and comparative examples 1-4 were tested for tensile strength, impact strength, heat resistance, flame retardancy, antibacterial property, volume resistivity, and voltage resistance, respectively, according to the following test methods:
tensile strength: the test is carried out at the temperature of 23 +/-2 ℃ according to the regulation of GB/T1040.2-2006, and the test speed is as follows: 50mm/min in MPa.
Impact strength: the notched impact strength of the alloy is determined according to GB/T1043.1-2008, sampleStrip size: (80X 10X 4) mm, notch type: type A, the test environment is 23 +/-2 ℃, and the unit is kJ/m2。
Heat resistance: the Vicat softening temperature is tested according to the regulation of GB/T1633-2000, and A is adopted50Measured by the method, the applied load was 1kg in units of ℃.
Flame retardance: the sample thickness was 1.6mm using UL-94 standard.
And (3) antibacterial property: the antibacterial rate was measured and calculated in% according to appendix A of QB/T2591-2003 antibacterial Plastic-antibacterial Performance test methods and antibacterial Effect.
And (3) volume resistivity test: the volume resistivity was measured in Ω · m according to the regulations of GB/T1410-2006.
And (3) voltage resistance test: the test is carried out according to the regulation of GB/T1408.1-2006, the voltage is increased to 50kV, the voltage is kept for 1min, and the voltage increasing speed is 1000V/s.
The test results are shown in table 1 below:
TABLE 1
| Tensile strength MPa | Notched impact strength KJ/m2 | Vicat softening temperature DEG C | Flame retardancy | Antibacterial property | Volume resistivity omega m | Withstand electric powerPressure test | |
| Example 2 | 48.8 | 11.6 | 163.3 | V-0 | 99.0% | 6.5×1011 | Without breakdown |
| Example 3 | 44.2 | 9.8 | 151.7 | V-1 | 95.2% | 8.9×1011 | Does not break down |
| Example 4 | 49.3 | 12.0 | 165.9 | V-0 | 99.3% | 1.3×1011 | Without breakdown |
| Example 5 | 48.5 | 11.8 | 163.1 | V-0 | 98.5% | 5.8×1011 | Without breakdown |
| Comparative example 1 | 40.6 | 7.4 | 163.0 | V-1 | 96.0% | 1.0×1011 | Without breakdown |
| Comparative example 2 | 37.9 | 6.7 | 140.5 | V-2 | 44.7% | 2.1×1012 | Breakdown of |
| Comparative example 3 | 39.5 | 7.9 | 148.8 | V-1 | 98.9% | 6.3×1011 | Does not break down |
| Comparative example 4 | 37.4 | 8.2 | 142.4 | V-1 | 99.0% | 6.8×1011 | Breakdown of |
As can be seen from table 1 above, the high impact modified polypropylene composite material of the present invention uses polypropylene as a main resin, and is modified by adding high density polyethylene, modified inorganic substances, glass fibers, flame retardants, coupling agents, compatibilizers, antioxidants, and other additives, such that the prepared high impact modified polypropylene composite material has excellent compressive strength, impact strength, tensile strength, heat resistance, flame retardancy, and antibacterial property, and the service life of the rotary universal joint prepared from the high impact modified polypropylene composite material is prolonged. In example 2, compared with comparative example 1 and comparative example 2, the tensile strength and the notched impact strength of example 2 are significantly higher, which shows that the modified inorganic substance has a large acceleration effect on the tensile strength and the notched impact strength and a significant acceleration effect on the voltage resistance. Example 2, which is superior to comparative example 3 in tensile strength, notched impact strength and Vicat softening point, demonstrates that the use of a specific compatibilizer is more suitable for the high impact modified polypropylene composite of the present invention. Example 2 has better tensile strength, notched impact strength, vicat softening point and voltage resistance than comparative example 4, indicating that the use of high density polyethylene is more suitable for the high impact modified polypropylene composite of the present invention.
The above-described embodiments are preferred implementations of the present invention, and the present invention may be implemented in other ways without departing from the spirit of the present invention.
Claims (4)
1. A rotary universal joint characterized by: the pipe joint comprises a first connecting pipe and a second connecting pipe communicated with the first connecting pipe, wherein the first connecting pipe comprises a first pipe body and a female joint obliquely connected to one end of the first pipe body, the second connecting pipe comprises a second pipe body and a sub-joint obliquely connected to one end of the second pipe body, and the outer side wall of the sub-joint is rotatably abutted to the inner side wall of the female joint;
the female joint comprises an annular female seat connected with the first pipe body and a limiting block connected to the inner side wall of the annular female seat, the female joint comprises an annular sub-block connected with the second pipe body and a convex ridge extending to the outer side wall of the annular sub-block, the convex ridge is in rotary abutting joint with the inner side wall of the annular female seat, and the limiting block is used for limiting the axial movement of the convex ridge;
the outer side wall of the convex ridge is provided with an annular groove;
the first connecting pipe further comprises a first corrugated pipe, one end of the first corrugated pipe is connected with the first pipe body, and a first connecting part extends from the other end of the first corrugated pipe; the second connecting pipe also comprises a second corrugated pipe, one end of the second corrugated pipe is connected with the second pipe body, and a second connecting part extends from the other end of the second corrugated pipe;
the first connecting pipe and the second connecting pipe are both integrally injection-molded by high-impact modified polypropylene composite materials;
the high impact modified polypropylene composite material comprises the following raw materials in parts by weight:
100 portions of polypropylene
10-20 parts of high-density polyethylene
10-20 parts of modified inorganic substance
5-10 parts of glass fiber
8-15 parts of flame retardant
1-3 parts of coupling agent
5-8 parts of compatilizer
0.5-1.5 parts of antioxidant;
wherein the coupling agent is isopropyl dioleate acyloxy (dioctyl phosphate acyloxy) titanate; the compatilizer is ethylene-methyl acrylate copolymer;
the preparation method of each part of the modified inorganic matter comprises the following steps:
(A1) taking 30-40 parts of porous adsorption inorganic powder, 5-10 parts of nano silver powder, 1-2 parts of dispersing agent and 100 parts of ethanol according to parts by weight for later use;
(A2) sequentially adding a dispersing agent, porous adsorption inorganic substance powder and nano silver powder into ethanol under the stirring condition, and then stirring at a high speed of 1000-1800r/min for 1-3h to obtain a suspension;
(A3) and (C) drying the suspension obtained in the step (A2) at the temperature of 60 ℃, and then grinding into powder to obtain the modified inorganic substance.
2. A rotary universal joint according to claim 1, wherein: the quantity of stopper is 4, 4 stopper evenly distributed in the inside wall of female seat of annular.
3. A rotary universal joint according to claim 1, wherein: the periphery of the first corrugated pipe and the periphery of the second corrugated pipe are square, and each corner is sunken to form a fillet.
4. A rotary universal joint according to claim 1, wherein: the preparation method of the high impact modified polypropylene composite material comprises the following steps:
(S1) taking polypropylene, high-density polyethylene, modified inorganic matters, glass fibers, flame retardants, coupling agents, compatilizers and antioxidants according to parts by weight for later use;
(S2), mixing the modified inorganic substance, the glass fiber and the coupling agent for 1-2h to obtain a premix;
(S3) uniformly stirring the polypropylene, the high-density polyethylene, the flame retardant, the compatilizer, the antioxidant and the premix obtained in the step (S2), and then melting, extruding and granulating through a double-screw extruder to obtain the high-impact modified polypropylene composite material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010877817.2A CN112212106B (en) | 2020-08-27 | 2020-08-27 | Rotary universal joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010877817.2A CN112212106B (en) | 2020-08-27 | 2020-08-27 | Rotary universal joint |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112212106A CN112212106A (en) | 2021-01-12 |
| CN112212106B true CN112212106B (en) | 2022-06-21 |
Family
ID=74058848
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010877817.2A Active CN112212106B (en) | 2020-08-27 | 2020-08-27 | Rotary universal joint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112212106B (en) |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ZA707855B (en) * | 1969-11-24 | 1971-08-25 | Hydrotech Services | Method and apparatus for joining the ends of pipes |
| CN2711497Y (en) * | 2004-07-22 | 2005-07-20 | 周佰兴 | Direction changeable pipeline joint |
| CN104235521B (en) * | 2013-11-15 | 2016-06-22 | 安徽省忠宏管业科技有限公司 | A kind of antimicrobial PE tube |
| CN207021643U (en) * | 2017-05-18 | 2018-02-16 | 广东安普智信电气有限公司 | A kind of fixable type double-walled protection pipe |
| CN208816919U (en) * | 2018-09-20 | 2019-05-03 | 京华塑业有限公司 | A kind of used in construction drainage plastic pipe of variable-angle |
| CN109722086A (en) * | 2018-12-29 | 2019-05-07 | 中国有色桂林矿产地质研究院有限公司 | A kind of silver-based antimicrobial material and preparation method thereof containing porous composite calcium carbonate |
| CN109852152A (en) * | 2018-12-29 | 2019-06-07 | 中国有色桂林矿产地质研究院有限公司 | A kind of antibiotic paint and preparation method thereof containing porous organism |
| CN209267127U (en) * | 2019-01-10 | 2019-08-16 | 福建和盛塑业有限公司 | A kind of hollow cuboid-type and ring-shaped cylinder figure block bellows |
| CN110649538B (en) * | 2019-09-17 | 2021-04-09 | 广东安普智信电气有限公司 | High-impact-resistance pillow-shaped composite sleeve and sleeve assembly |
| CN110483906A (en) * | 2019-09-23 | 2019-11-22 | 泉州宁遇新材料有限公司 | A kind of PP/HDPE plastics of modification and preparation method thereof |
| CN111188952A (en) * | 2020-02-21 | 2020-05-22 | 四川宏途天宸科技有限公司 | MPPE (modified Polypropylene/polyethylene) composite reinforced double-wall reinforced corrugated pipe and preparation method thereof |
| CN213512547U (en) * | 2020-08-27 | 2021-06-22 | 广东威立瑞科技有限公司 | Rotary universal joint |
-
2020
- 2020-08-27 CN CN202010877817.2A patent/CN112212106B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN112212106A (en) | 2021-01-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20090127516A1 (en) | Electroconductive curable resins | |
| CN110283415B (en) | Thermoplastic elastomer with both conductivity and flame retardance and preparation method thereof | |
| CN103059520B (en) | Flame-retardant polyethylene terephthalate (PET) white master batch and preparation method thereof | |
| CN109233078B (en) | Sound insulation composite material for rail transit and preparation method thereof | |
| CN112457646A (en) | High-thermal-conductivity and high-electric-conductivity PC/ABS composite material and preparation method thereof | |
| CN112625405B (en) | Low-smoke density halogen-free flame-retardant reinforced PBT/PET compound and preparation method and application thereof | |
| CN109265990A (en) | High glass fire-retarding reinforced polyamide composition | |
| CN102241858A (en) | Flame-retardant antibacterial polypropylene material and preparation method thereof | |
| CN112592566A (en) | Low-smoke-density halogen-containing flame-retardant reinforced PBT/PET compound and preparation method and application thereof | |
| CN114479437A (en) | Flame-retardant polyamide composite material and preparation method and application thereof | |
| CN110194893B (en) | Silicon-aluminum compound and magnesium hydroxide synergistic flame-retardant nylon composite material and preparation method thereof | |
| CN112212106B (en) | Rotary universal joint | |
| CN115449217A (en) | Halogen-free flame-retardant polyamide composition with good toughness and preparation and application thereof | |
| CN112322020B (en) | Polyphenyl ether resin composition and preparation method thereof, and wire slot and preparation method thereof | |
| CN109096605A (en) | A kind of flame-proof electrostatic resistance polypropylene material and preparation method thereof | |
| CN110229537B (en) | Flame-retardant plastic-wood composite material with excellent water boiling resistance and preparation method thereof | |
| CN112029260B (en) | Fibrilia-reinforced PC/ABS composite material, and preparation method and application thereof | |
| CN103160101A (en) | Halogen-free flame retardant PC material with high fluidity, and preparation method thereof | |
| CN110724340B (en) | Permanent antistatic polypropylene composite material and preparation method thereof | |
| CN113788985A (en) | Modified composite antistatic agent, chlorinated polyvinyl chloride pipe and pipe fitting | |
| CN109244628B (en) | Waterproof marine antenna | |
| CN111635592A (en) | Cable composite material for engineering equipment and preparation method and application thereof | |
| CN111087717A (en) | Ultraviolet-resistant mildew-proof flame-retardant PVC and preparation method thereof | |
| CN114957876B (en) | Preparation process of environment-friendly extra-soft flame-retardant PVC hose material | |
| CN115058078B (en) | Nano dustproof polypropylene filter material and preparation method and application thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |