CN111550669B - Circular tubular explosion-proof structure and barrier explosion-proof composite material - Google Patents
Circular tubular explosion-proof structure and barrier explosion-proof composite material Download PDFInfo
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- CN111550669B CN111550669B CN202010426372.6A CN202010426372A CN111550669B CN 111550669 B CN111550669 B CN 111550669B CN 202010426372 A CN202010426372 A CN 202010426372A CN 111550669 B CN111550669 B CN 111550669B
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- 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
- F16S—CONSTRUCTIONAL ELEMENTS IN GENERAL; STRUCTURES BUILT-UP FROM SUCH ELEMENTS, IN GENERAL
- F16S3/00—Elongated members, e.g. profiled members; Assemblies thereof; Gratings or grilles
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L77/00—Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Compositions of derivatives of such polymers
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- 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
- C08K2003/026—Phosphorus
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- 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
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- 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
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- 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
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
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- 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
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Abstract
The invention discloses a circular tubular explosion-proof structure body and a barrier explosion-proof composite material, belongs to the technical field of explosion prevention, and solves the problems that the barrier explosion-proof composite material in the prior art is easy to collapse and deform, the existing barrier explosion-proof structure adopts an injection molding process, and the production cost is high. The circular tubular explosion-proof structure body comprises an outer ring pipe body, a middle ring pipe body and an inner ring pipe body which are coaxially arranged from outside to inside in sequence; the outer ring pipe body and the middle ring pipe body are both cylindrical structures; the inner ring pipe body is of a hexagonal prism cylindrical structure; the outer ring pipe body, the middle ring pipe body and the inner ring pipe body are connected into a whole through 6 large rectangular supporting bodies extending from six edges of the inner ring shell to the inner surface of the outer ring pipe body; a plurality of small rectangular supporting bodies which are distributed along 6 buses of the middle ring pipe body and extend to the inner surface of the outer ring pipe body are also arranged between the outer ring pipe body and the middle ring pipe body, and the number of the small rectangular supporting bodies on the same bus is more than or equal to 1. The circular tubular explosion-proof structure body is low in cost and good in explosion-proof effect.
Description
Technical Field
The invention relates to the technical field of explosion prevention, in particular to a circular tubular explosion-proof structural body and a barrier explosion-proof composite material.
Background
The blocking explosion-proof technology can effectively prevent the explosion of flammable and explosive gas and liquid dangerous chemicals caused by accidents (static electricity, welding, gunshot, collision, misoperation and the like) in storage and transportation, and the blocking explosion-proof material with the explosion-proof function is arranged in a container, so that the dangerous problems of burning, explosion and the like of flammable and explosive liquid and gas dangerous chemicals in the storage, transportation and use processes can be fundamentally solved.
The blocking explosion-proof material is generally of a honeycomb structure, the interior of a container for storing, transporting and using flammable and explosive liquid and gaseous hazardous chemicals can be divided into a plurality of small chambers or cavities, and the small chambers or the cavities can effectively inhibit flame propagation and enable explosion pressure waves to be sharply attenuated; meanwhile, the material of the honeycomb structure has higher surface efficiency in unit volume, thereby having good heat absorption, rapidly absorbing heat released by combustion, reducing the temperature after combustion reaction, reducing the expansion degree of reaction gas, increasing little pressure value in a container, ensuring that the combustion speed does not reach the explosion limit speed, and achieving the purpose of explosion prevention.
At present, barrier explosion-proof materials are divided into metal barrier explosion-proof materials and nonmetal barrier explosion-proof materials. The metal barrier explosion-proof material is mainly supported by an aluminum alloy material, and is rolled into a body material with a net structure after being formed by net pulling; however, the aluminum alloy material is relatively active, is easy to react with active substances in flammable and explosive dangerous chemicals, has low self structural strength, is easy to collapse, drop slag and other problems in the long-term contact process with a medium, and simultaneously pollutes the medium. The nonmetal barrier explosion-proof material comprises a polyurethane barrier explosion-proof material and a thermoplastic resin-based barrier explosion-proof material. The polyurethane barrier explosion-proof material has poor chemical stability, is easy to oxidize and hydrolyze, has obvious swelling phenomenon, and is unfavorable for the storage and transportation of flammable and explosive hazardous chemicals and the long-term use of containers. The thermoplastic resin-based barrier explosion-proof material is a barrier explosion-proof material adopting an injection molding process, which appears in recent years, however, the thermoplastic resin-based barrier explosion-proof material adopting the injection molding process has a remarkable defect, the production cost is high, a precise injection molding machine and a high-precision mold are required for production, the selling price reaches several times of that of aluminum alloy barrier explosion-proof materials, the market acceptance degree in popularization and use is low, and particularly when the thermoplastic resin-based barrier explosion-proof material is applied to large storage and transportation tank bodies of road transportation, hazardous chemical enterprises and the like, the consumption of the thermoplastic resin-based barrier explosion-proof material adopting the injection molding process is increased along with the increase of the volume of a container, the cost is greatly increased, and the price of the barrier explosion-proof material is possibly higher than that of the tank bodies. At present, the research on the thermoplastic resin-based barrier explosion-proof material is not systematic, and the problems of easy collapse and deformation still exist.
Disclosure of Invention
In view of the above analysis, the present invention aims to provide a circular tubular explosion-proof structure and a barrier explosion-proof composite material, which can solve at least one of the following technical problems: (1) The existing barrier explosion-proof structure adopts an injection molding process, so that the production cost is higher; (2) the production efficiency is low; (3) The existing barrier explosion-proof composite material is easy to collapse and deform.
The purpose of the invention is mainly realized by the following technical scheme:
on one hand, the invention provides a circular tubular explosion-proof structure body which comprises an outer ring pipe body, a middle ring pipe body and an inner ring pipe body which are coaxially arranged from outside to inside in sequence, and two end faces of the outer ring pipe body, the middle ring pipe body and the inner ring pipe body are flush; the outer ring pipe body and the middle ring pipe body are both cylindrical structures; the inner ring pipe body is of a hexagonal prism cylindrical structure; the outer ring pipe body, the middle ring pipe body and the inner ring pipe body are connected into a whole through 6 large rectangular supporting bodies extending from six edges of the inner ring shell to the inner surface of the outer ring pipe body; a plurality of small rectangular supports which are distributed along 6 buses of the middle ring pipe body and extend to the inner surface of the outer ring pipe body are further arranged between the outer ring pipe body and the middle ring pipe body, the number of the small rectangular supports on the same bus is more than or equal to 1, and the circular tubular explosion-proof structure body is formed by adopting an extrusion process.
In one possible design, the surfaces of the outer ring pipe body and the middle ring pipe body are provided with radial circular through holes which are uniformly distributed in the circumferential direction.
In one possible design, the round through hole on the outer ring pipe body and the round through hole on the coaxially corresponding middle ring pipe body are provided with small rectangular supporting bodies at two axial sides.
In one possible design, the distance between the small rectangular support body and the large rectangular support bodies on two sides on the same bus is equal in the circumferential direction.
In one possible design, the connection position of the small rectangular support body and the outer ring pipe body and the middle ring pipe body is positioned outside the radial circular through hole.
In one possible design, the inner diameter of the outer ring tube body is 30-100mm.
In one possible design, the diameter of the circular through-hole is 8-20mm.
On the other hand, the invention also provides a barrier explosion-proof composite material, which comprises the following raw materials in percentage by mass: polyamide resin: 83.7% -87.9%, antistatic agent: 8% -10%, flame retardant: 4% -6%, lubricant: 0.1% -0.3%; wherein the flame retardant is a compound mixture of expanded graphite and red phosphorus.
In one possible design, the mass ratio of expanded graphite to red phosphorus is 2.5-3.5.
In one possible design, the lubricant is a silicone masterbatch, which includes siloxane and polyamide resins.
Compared with the prior art, the invention can realize at least one of the following beneficial effects:
(1) The circular tubular explosion-proof structure body provided by the invention forms a plurality of stable small compartments with certain blocking effect through the outer ring tube body, the middle ring tube body, the inner ring tube body, the large rectangular support body, the small rectangular support body and the circular through holes, and the small compartments can effectively inhibit the propagation of flame and enable explosion pressure waves to be sharply attenuated; meanwhile, the material has higher surface efficiency in unit volume and good heat absorption, can quickly absorb heat released by combustion, reduces the temperature after combustion reaction, reduces the expansion degree of reaction gas, does not increase the pressure value in a container greatly, and ensures that the combustion speed does not reach the explosion limit speed, thereby achieving the aim of explosion prevention.
(2) The circular tubular explosion-proof structure body provided by the invention is made of the barrier explosion-proof composite material, the barrier explosion-proof composite material adopts a polyamide resin, an antistatic agent, a flame retardant and a lubricant system, the polyamide resin is used as a base material, the circular tubular explosion-proof structure body has excellent corrosion resistance, the service life is long, the structure stability is good, a compound mixture of expanded graphite and red phosphorus is used as the flame retardant, the red phosphorus and the polyamide resin can directly form a high-efficiency nitrogen-phosphorus synergistic flame retardant effect, and the addition of the expanded graphite has a remarkable promotion effect on rapid carbon formation in a combustion process. The flame retardant efficiency can be improved by adopting the compound mixture of the expanded graphite and the red phosphorus as the flame retardant; the filler addition amount of the invention is obviously reduced, and the influence of the excessively high filler addition on the corrosion resistance of the polyamide resin is reduced.
(3) The compression strength of the round tubular explosion-proof structure body provided by the invention is more than or equal to 18MPa; the compressive strength is far greater than the requirement of JT/T1046-2016 (the compressive strength of the standard is not lower than 10 MPa); the volume resistivity of the round tubular explosion-proof structure body is less than or equal to 3.5 multiplied by 10 9 Omega cm; the flame retardant grade is not lower than V-1 grade; the secondary explosion phenomenon does not occur in the static explosion test. The circular tubular explosion-proof structure body has high compression strength, resists the extrusion of external force, is not easy to deform to cause the problems of collapse, damage, slag falling and the like, and cannot generate a polluted medium; good flame-retardant and explosion-proof effect, excellent comprehensive performance and wide application range.
(4) The round tubular explosion-proof structure body provided by the invention has the advantages of simple and compact integral structure, high strength, simple process and easiness in processing and manufacturing, is formed by adopting an extrusion process and is beneficial to wide popularization. The production cost of the round tubular explosion-proof structure body is only 1000-1500 yuan m 3 (ii) a Far lower than the production cost of the injection molding process of 2500-3000 yuan/m 3 (ii) a The production efficiency of a single machine for preparing the circular tubular explosion-proof structural body is 1-1.5m 3 H; far higher than the maximum production efficiency of 0.5m currently known by injection molding 3 H is used as the reference value. The circular tubular explosion-proof structural body provided by the invention is low in manufacturing cost, high in production efficiency and strong in applicability.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and drawings.
Drawings
The drawings, in which like reference numerals refer to like parts throughout, are for the purpose of illustrating particular embodiments only and are not to be considered limiting of the invention.
FIG. 1 is a schematic perspective view of a circular tubular explosion-proof structure according to the present invention;
FIG. 2 is a schematic top view of the circular tubular explosion proof structure of the present invention;
fig. 3 is a schematic front structural view of the circular tubular explosion-proof structural body of the present invention.
Reference numerals:
1-outer ring tube body, 2-middle ring tube body, 3-inner ring tube body, 4-large rectangular support body, 5-small rectangular support body and 6-circular through hole.
Detailed Description
The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which form a part hereof, and which together with the embodiments of the invention serve to explain the principles of the invention.
The invention provides a circular tubular explosion-proof structure body. As shown in fig. 1 to 3, the circular tubular explosion-proof structure body includes: the outer ring pipe body 1, the middle ring pipe body 2 and the inner ring pipe body 3 are coaxially arranged from outside to inside in sequence, and two end faces of the outer ring pipe body 1, the middle ring pipe body 2 and the inner ring pipe body 3 are flush; the outer ring pipe body 1 and the middle ring pipe body 2 are both cylindrical structures; the inner ring pipe body 3 is of a hexagonal prism cylindrical structure; the outer ring pipe body 1, the middle ring pipe body 2 and the inner ring pipe body 3 are connected into a whole through 6 large rectangular support bodies 4 extending from six edges of the inner ring shell 3 to the inner surface of the outer ring pipe body 1; a plurality of small rectangular supporting bodies 5 which are distributed along 6 buses of the middle ring pipe body 2 and extend to the inner surface of the outer ring pipe body 1 are further arranged between the outer ring pipe body 1 and the middle ring pipe body 2, the number of the small rectangular supporting bodies 5 on the same bus is more than or equal to 1, and the distances between the small rectangular supporting bodies 5 on the same bus and the large rectangular supporting bodies 4 on two sides are equal in the circumferential direction.
It should be noted that the small rectangular support body 5 and the large rectangular support body 4 of the circular tubular explosion-proof structure body are both in a rectangular parallelepiped shape, which is simple in structure and beneficial to production and processing, and can be directly formed during extrusion process forming.
Specifically, in order to reduce the weight and divide the circular tubular explosion-proof structure into a plurality of small chambers or cavities, the propagation of flame is effectively restrained through the small chambers or the cavities, so that the explosion pressure wave is sharply attenuated, and the surfaces of the outer ring pipe body 1 and the middle ring pipe body 2 are respectively provided with radial circular through holes 6 which are uniformly distributed in the circumferential direction; the diameters of the circular through holes 6 are the same and are uniformly distributed. The setting of circular through-hole has increased the propagation passageway of blasting gas simultaneously, and the directional change of propagation passageway further promotes and weakens the propagation ability of blasting nature gas step by step.
Specifically, the circular through holes 6 are arranged in multiple rows, the number of the circular through holes 6 in each row is 3-5, and preferably, the number of the circular through holes 6 in each row is 3.
Considering that an excessive number of the circular through holes 6 may reduce the strength of the circular tubular explosion-proof structure, the circular through holes 6 are controlled to be 5 to 8 rows, and preferably, the circular through holes 6 are 6 rows.
In order to ensure the strength of the circular tubular explosion-proof structure body, small and rectangular supporting bodies 5 are arranged on the two axial sides of the circular through hole on the outer ring pipe body 1 and the circular through hole on the coaxially corresponding middle ring pipe body 2, and the small and rectangular supporting bodies 5 can play the role of reinforcing ribs.
In a possible design, the small rectangular support body 5 is provided in the diameter direction of the circular through hole 6 in the generatrix direction of the outer ring tube body 1 or the middle ring tube body 2, which enables the weight reduction of the maximum effect and also the retention of the fuel inside the explosion-proof structure to be minimized.
Specifically, the mass of the circular tubular explosion-proof structure body is large due to the fact that the thickness of the circular tubular explosion-proof structure body is too large, the steps of placing and taking out the circular tubular explosion-proof structure body are inconvenient in the using process, and materials are wasted; the small thickness can cause the strength of the circular tubular explosion-proof structure body to be insufficient and the circular tubular explosion-proof structure body to be easy to deform; therefore, the thickness of each part of the circular tubular explosion-proof structure body is controlled to be consistent, and the thickness is controlled to be 0.3-0.8mm.
Specifically, the filling of the explosion-proof structure body is not facilitated due to the overlarge inner diameter of the outer ring pipe body 1; too small an inner diameter results in increased packing density and reduced performance and applicability. Therefore, the inner diameter of the outer annular tube body 1 is controlled to be 30-100mm.
Specifically, the inner diameter of the middle ring pipe body 2 is too large, which results in a small distance between the middle ring pipe body 2 and the outer ring pipe body 1 and a reduced explosion-proof effect of the explosion-proof structure; if the inner diameter is too small, the distance between the middle ring pipe body 2 and the inner ring pipe body 3 is small, and the explosion-proof effect of the explosion-proof structure is also reduced. Therefore, the inner diameter of the control middle ring pipe body 2 is 15-80mm.
Specifically, the too large side length of the inner ring pipe body 3 causes the distance between the middle ring pipe body 2 and the inner ring pipe body 3 to be small, and the explosion-proof effect of the explosion-proof structure body is reduced, so that the side length of the inner ring pipe body 3 is controlled to be 5-30mm.
Specifically, the too big intensity that can cause the explosion-proof structure body of diameter of circular through-hole 6 reduces, and the diameter undersize is unfavorable for inside circulation to the circulation of the gaseous of hindering the blasting is unfavorable for explosion-proof effect. Therefore, the diameter of the circular through hole 6 is controlled to be 8-20mm.
Specifically, the small rectangular supports 5 are all the same in width.
Considering that the width of the small rectangular support body 5 is too large, the effect of improving the strength is not increased remarkably, materials are wasted, and the weight is increased; the width is too small, and the effect of improving the strength is insufficient, and therefore, the width of the small rectangular support 5 is controlled to 2 to 8mm.
Specifically, the circular tubular explosion-proof structure body is formed by adopting an extrusion process.
When the anti-explosion container is used, the plurality of circular tubular anti-explosion structural bodies are directly placed in the container, and then flammable and combustible gaseous and liquid hazardous chemicals are filled into the container, so that the circular tubular anti-explosion structural bodies can prevent the flammable and combustible liquid and the gaseous hazardous chemicals from burning, exploding and other dangerous problems in the storage, transportation and use processes.
The circular tubular explosion-proof structure body is prepared from the following barrier explosion-proof composite materials, wherein the barrier explosion-proof composite materials comprise the following raw materials in percentage by mass: polyamide resin: 83.7% -87.9%, antistatic agent: 8% -10%, flame retardant: 4% -6%, lubricant: 0.1% -0.3%; wherein the fire retardant is a compound mixture of expanded graphite and red phosphorus.
Specifically, the flame retardant effect cannot be achieved due to the excessively high mass ratio of the expanded graphite to the red phosphorus; too low will be detrimental to the increase of flame retardant effect and increase the cost. Therefore, the mass ratio of the expanded graphite to the red phosphorus is controlled to be 2.5-3.5, and preferably, the mass ratio of the expanded graphite to the red phosphorus is 3.
Specifically, the polyamide resin is one of polyamide 6 and polyamide 66.
Specifically, the antistatic agent is nano antimony-doped tin oxide.
Specifically, the lubricant is silicone master batch, the silicone master batch is formed by uniformly dispersing siloxane in polyamide resin, and the siloxane content is too low to play a role in lubrication and stability. Thus, the siloxane content is controlled to be 49% to 51%.
Specifically, the siloxane in the silicone master batch has high-temperature stability, is not easy to decompose, and can improve the stability of the barrier explosion-proof composite material.
Specifically, the corrosion resistance of the barrier explosion-proof composite material meets the compatibility requirement in GJB8455-2015 and JT/T1046-2016 standards; the flame retardant grade is V-0 grade; the tensile strength is 60-70MPa; compressive strength: 15-25MPa.
The invention also provides a preparation method of the circular tubular explosion-proof structure body, which comprises the following steps:
and 2, adding the mixture system into a double-screw extruder, and directly extruding and molding through a matched die head to obtain the circular tubular explosion-proof structure body.
Specifically, in the step 2, the die head has the functions of fixed-length cutting and punching, and the punching function is mainly used for manufacturing the circular through hole 6.
Compared with the prior art, the circular tubular explosion-proof structure body provided by the invention forms a plurality of stable small compartments with a certain blocking effect through the outer ring tube body, the middle ring tube body, the inner ring tube body, the large rectangular support body, the small rectangular support body and the circular through holes, and the small compartments can effectively inhibit flame propagation and enable explosion pressure waves to be sharply attenuated; meanwhile, the material has higher surface efficiency in unit volume and good heat absorption, can quickly absorb heat released by combustion, reduces the temperature after combustion reaction, reduces the expansion degree of reaction gas, does not increase the pressure value in a container greatly, and ensures that the combustion speed does not reach the explosion limit speed, thereby achieving the aim of explosion prevention.
The circular tubular explosion-proof structure body provided by the invention adopts a specific barrier explosion-proof composite material, the barrier explosion-proof composite material adopts a polyamide resin, an antistatic agent, a flame retardant and a lubricant system, the polyamide resin is adopted as a base material, the circular tubular explosion-proof structure body has excellent corrosion resistance, the service life is long, the structure stability is good, a compound mixture of expanded graphite and red phosphorus is adopted as the flame retardant, the red phosphorus and the polyamide resin can directly form a high-efficiency nitrogen-phosphorus synergistic flame retardant effect, and the addition of the expanded graphite has a remarkable promotion effect on rapid carbon formation in a combustion process. The flame retardant efficiency can be improved by adopting the compound mixture of the expanded graphite and the red phosphorus as the flame retardant; the filler addition amount of the invention is obviously reduced, and the influence of the excessively high filler addition on the corrosion resistance of the polyamide resin is reduced.
The compression strength of the circular tubular explosion-proof structure provided by the invention is more than or equal to 18MPa; the compressive strength is far greater than the requirement of JT/T1046-2016 (the compressive strength of the standard is not lower than 10 MPa); the volume resistivity of the round tubular explosion-proof structure body is less than or equal to 3.5 multiplied by 10 9 Omega cm; the flame retardant grade is not lower than V-1 grade; the secondary explosion phenomenon does not occur in the static explosion test. The circular tubular explosion-proof structure body has high compression strength, resists the extrusion of external force, is not easy to deform to cause the problems of collapse, damage, slag falling and the like, and cannot generate a polluted medium; good flame-retardant and explosion-proof effect, excellent comprehensive performance and wide application range.
The circular tubular explosion-proof structure body provided by the invention has the advantages of simple and compact integral structure, high strength, simple process and easiness in processing and manufacturing, is formed by adopting an extrusion process and is beneficial to wide popularization. The production cost of the round tubular explosion-proof structure body is only 1000-1500 yuan m 3 (ii) a Far lower than the production cost of the injection molding process of 2500-3000 yuan/m 3 (ii) a For preparing a single machine for the circular tubular explosion-proof structure of the inventionThe production efficiency is 1-1.5m 3 H; far higher than the maximum production efficiency of 0.5m currently known by injection molding 3 H is used as the reference value. The circular tubular explosion-proof structural body provided by the invention is low in manufacturing cost, high in production efficiency and strong in applicability.
Example 1
The embodiment provides a circular tubular explosion-proof structure body, including: the device comprises an outer ring pipe body 1, a middle ring pipe body 2, an inner ring pipe body 3, a large rectangular support body 4 and a small rectangular support body 5; the circular tubular explosion-proof structure body is formed by an outer ring tube body 1, a middle ring tube body 2, an inner ring tube body 3, a large rectangular support body 4 and a small rectangular support body 5.
The outer ring pipe body 1 is of a cylindrical structure and is arranged outside the middle ring pipe body 2; the middle ring pipe body 2 is of a cylindrical structure and is arranged between the outer ring pipe body 1 and the inner ring pipe body 3; the inner ring pipe body 3 is of a hexagonal prism cylindrical structure and is arranged inside the middle ring pipe body 2; the outer ring pipe body 1, the middle ring pipe body 2 and the inner ring pipe body 3 are coaxially arranged on the same plane in parallel, and the heights of the three are the same; the large rectangular support body 4 is uniformly arranged between the inner ring pipe body 3 and the outer ring pipe body 1, and the large rectangular support body 4 is connected with the outer side of the edge of the inner ring pipe body 3 and the inner side of the outer ring pipe body 1 and penetrates through the middle ring pipe body 2; the small rectangular support body 5 is arranged between the middle ring pipe body 2 and the outer ring pipe body 1, and two ends of the small rectangular support body 5 are respectively connected with the outer side of the middle ring pipe body 2 and the inner side of the outer ring pipe body 1.
The outer ring pipe body 1 and the middle ring pipe body 2 are respectively provided with a coaxial circular through hole 6 which has the same diameter and is uniformly distributed, and the number of each row of circular through holes 6 is 3; the circular through holes 6 are 6 rows; and small rectangular supporting bodies 5 are distributed on two axial sides of the circular through hole on the outer ring pipe body and the circular through hole on the coaxially corresponding middle ring pipe body. All parts of the round tubular explosion-proof structure body are consistent in thickness, and the thickness is 0.5mm.
Specifically, the inner diameter of the outer ring pipe body 1 is 40mm; the diameter of the circular through hole 6 is 10mm; the inner diameter of the middle ring pipe body 2 is 28mm; the side length of the inner ring pipe body 3 is 10mm; the small rectangular support bodies 5 are all the same in width, and the width of the small rectangular support body 5 is 3.5mm.
The material of the circular tubular explosion-proof structure body of the embodiment can comprise the following raw materials in parts by mass: polyamide resin: 83.7%, antistatic agent: 10%, flame retardant: 6%, lubricant: 0.3 percent.
Specifically, the polyamide resin is polyamide 6; the antistatic agent is nano antimony-doped tin oxide; the flame retardant is a compound mixture of expanded graphite and red phosphorus, and the proportion of the expanded graphite to the red phosphorus is 3; the lubricant is silicone master batch, the silicone master batch is formed by uniformly dispersing siloxane in polyamide resin, and the content of the siloxane in the silicone master batch is 49%.
The circular tubular explosion-proof structure body is obtained by adopting an extrusion process, and specifically, the preparation method of the circular tubular explosion-proof structure body comprises the following steps:
and 2, adding the mixture system into a double-screw extruder, and directly extruding and molding through a matched die head to obtain the circular tubular explosion-proof structure body.
Example 2
The present embodiment provides a circular tubular explosion-proof structure, the structural form and the preparation method of the circular tubular explosion-proof structure are the same as those in embodiment 1, and are not described herein one by one, but the differences are:
the thickness of each part of the circular tubular explosion-proof structure body is 0.8mm; the inner diameter of the outer ring pipe body is 100mm; the diameter of each circular through hole is 20mm, and the number of single rows of the circular through holes is 4; the inner diameter of the middle ring pipe body is 28mm; the side length of the inner ring pipe body is 10mm; the width of the small rectangular support body is 6mm.
The material of the circular tubular explosion-proof structure body of the embodiment can comprise the following raw materials in parts by mass: polyamide resin: 87.9%, antistatic agent: 8%, flame retardant: 4%, lubricant: 0.1 percent.
Specifically, the polyamide resin is polyamide 66; the antistatic agent is nano-scale antimony-doped tin oxide; the flame retardant is a compound mixture of expanded graphite and red phosphorus, and the proportion of the expanded graphite to the red phosphorus is 3; the lubricant is silicone master batch, wherein the content of siloxane is 51 percent.
Example 3
The present embodiment provides a circular tubular explosion-proof structure, the structural form and the preparation method of the circular tubular explosion-proof structure are the same as those in embodiment 1, and are not described herein one by one, and the differences are as follows:
the thickness of each part of the round tubular explosion-proof structure body is 0.3mm; the inner diameter of the outer ring pipe body is 30mm; the diameter of each circular through hole is 8mm, and the number of the single rows is 5; the inner diameter of the middle ring pipe body is 15mm; the side length of the inner ring pipe body is 5mm; the width of the small rectangular support is 2mm.
The material of the circular tubular explosion-proof structure body of the embodiment can comprise the following raw materials in parts by mass: polyamide resin: 85.8%, antistatic agent: 9%, flame retardant: 5%, lubricant: 0.2 percent.
Specifically, the polyamide resin is polyamide 66; the antistatic agent is nano antimony-doped tin oxide; the flame retardant is a compound mixture of expanded graphite and red phosphorus, and the proportion of the expanded graphite to the red phosphorus is 3; the lubricant is silicone master batch, wherein the content of siloxane is 50%.
Table 1 shows the relevant detection results of the circular tubular explosion-proof structure body in the embodiments 1-3 of the invention, and according to JT/T1046-2016 technical requirements on the explosion-proof safety of the oil tank and the liquid fuel transportation tank of road transportation vehicles and GJB8455-2015 technical specification on the explosion-proof material for filling the oil tank of the oil tank, the volume resistivity of the explosion-proof material is not more than 1.0 x 10 10 Omega cm, the flame retardant grade is not lower than V-1 grade, the chipping amount after the vibration test is not more than 1.3mg/L and 1.0mg/L respectively, and the secondary explosion phenomenon does not occur in the static explosion test. As can be seen from Table 1, the test results of examples 1-3 of the present invention meet the requirements of the relevant standards.
Table 1 examples 1-3 performance test results
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention.
Claims (10)
1. A circular tubular explosion-proof structure body is characterized by comprising an outer ring tube body (1), a middle ring tube body (2) and an inner ring tube body (3) which are coaxially arranged from outside to inside in sequence, wherein two end faces of the outer ring tube body (1), the middle ring tube body (2) and the inner ring tube body (3) are parallel and level; the outer ring pipe body (1) and the middle ring pipe body (2) are both cylindrical structures; the inner ring pipe body (3) is of a hexagonal prism cylindrical structure;
the outer ring pipe body (1), the middle ring pipe body (2) and the inner ring pipe body (3) are connected into a whole through 6 large rectangular supporting bodies (4) extending from six edges of the inner ring pipe body (3) to the inner surface of the outer ring pipe body (1); a plurality of small rectangular supporting bodies (5) which are distributed along 6 buses of the middle ring pipe body (2) and extend to the inner surface of the outer ring pipe body (1) are further arranged between the outer ring pipe body (1) and the middle ring pipe body (2), the number of the small rectangular supporting bodies (5) on the same bus is more than or equal to 1, and the circular tubular explosion-proof structure body is formed by adopting an extrusion process.
2. The circular tubular explosion-proof structure body according to claim 1, characterized in that the surfaces of the outer ring tube body (1) and the middle ring tube body (2) are provided with radial circular through holes (6) which are uniformly distributed in the circumferential direction.
3. The circular tubular explosion-proof structure body according to claim 2, characterized in that the circular through hole on the outer ring tube body (1) and the circular through hole on the coaxially corresponding middle ring tube body (2) are provided with small rectangular supports (5) at both axial sides.
4. The circular tubular explosion-proof structure body according to claim 3, characterized in that the distance between the small rectangular support body (5) and the large rectangular support bodies (4) on both sides on the same bus bar is equal in the circumferential direction.
5. The circular tubular explosion-proof structure body according to claim 4, characterized in that the connection of the small rectangular support body (5) and the outer ring tube body (1) and the middle ring tube body (2) is positioned outside the radial circular through hole (6).
6. A circular tubular explosion proof structure according to any one of claims 2 to 5, wherein the inner diameter of the outer ring tube body (1) is 30 to 100mm.
7. A circular, tubular explosion proof structure according to claim 6, wherein the diameter of the radial circular through holes (6) is 8-20mm.
8. A barrier explosion-proof composite material for preparing the circular tubular explosion-proof structure body as claimed in any one of claims 1 to 7, wherein the barrier explosion-proof composite material comprises the following raw materials in percentage by mass: polyamide resin: 83.7% -87.9%, antistatic agent: 8% -10%, flame retardant: 4% -6%, lubricant: 0.1 to 0.3 percent; wherein the flame retardant is a compound mixture of expanded graphite and red phosphorus.
9. A barrier explosion-proof composite material as claimed in claim 8, wherein the mass ratio of the expanded graphite to the red phosphorus is 2.5-3.5.
10. A barrier explosion-proof composite material as claimed in claim 9, wherein the lubricant is a silicone master batch comprising siloxane and polyamide resins.
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