Steel wire braided high pressure rubber hose and its preparation process

Abstract

The application relates to the field of high-pressure rubber hoses, in particular to a steel wire braided high-pressure rubber hose and a preparation process thereof. The steel wire braided high-pressure rubber hose comprises, from inside to outside, an inner rubber layer, a first steel wire layer, a middle rubber layer, a second steel wire layer and an outer rubber layer; the inner rubber layer is made of inner rubber; the middle rubber layer is made of middle rubber; the first steel wire layer and the second steel wire layer are made of steel wire braiding; and the outer rubber layer is made of outer rubber, wherein the outer rubber comprises the following raw materials: nitrile rubber, zinc oxide, hard acid ester, anti-aging agent, filler, plasticizer, dodecyl benzene sulfonic acid and vulcanizing agent. The preparation method comprises the following steps: raw rubber, plasticizing, mixing, filtering, sheeting, extruding an inner tube, braiding steel wire, calendering middle rubber, coating outer rubber, hose cloth winding, vulcanization, unwinding cloth and obtaining a finished product. The composition has the advantages that the wear resistance of the outer rubber is improved, and the service life of the steel wire braided high-pressure rubber hose is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of high-pressure rubber hose, more particularly, it relates to a steel wire braided high-pressure rubber hose and a preparation process thereof. BACKGROUND

[0002] The steel wire braided high-pressure rubber hose is suitable for injection molding machines, various machine tools and mechanized and automated hydraulic systems in various industrial departments, and can also be used for cleaning machines. It is used for conveying petroleum-based (such as mineral oil, soluble oil, hydraulic oil, fuel oil, lubricating oil) and water-based liquids (such as emulsion, oil-water emulsion, water) with high pressure and temperature.

[0003] The steel wire braided high-pressure rubber hose generally has an inner rubber layer, a middle layer and an outer rubber layer arranged from inside to outside in sequence, the middle layer includes a plurality of steel wire layers and a plurality of middle rubber layers, and the steel wire layers and the middle rubber layers are arranged alternately; for example, two steel wire layers and one middle rubber layer, the middle rubber layer is arranged between the two steel wire layers, the innermost steel wire layer is connected with the inner rubber layer, and the outermost steel wire layer is connected with the outer rubber layer. The inner rubber layer, the middle rubber layer and the outer rubber layer of the general rubber hose are made of natural rubber, styrene-butadiene rubber or nitrile rubber.

[0004] When using the cleaning machine, the cleaning machine needs to be moved, and the steel wire braided high-pressure rubber hose exposed to the outside is often rubbed with the ground. Although the rubber has a certain wear resistance, due to frequent friction with the rough bottom surface, the rubber outer layer of the steel wire braided high-pressure rubber hose will still be severely worn, resulting in the need to frequently replace the steel wire braided rubber hose, and thus there is room for improvement. SUMMARY

[0005] In order to improve the wear resistance of the rubber outer layer and thus improve the service life of the steel wire braided high-pressure rubber hose, the present application provides a steel wire braided high-pressure rubber hose and a preparation process thereof.

[0006] In a first aspect, the present application provides a steel wire braided high-pressure rubber hose, which adopts the following technical scheme: a steel wire braided high-pressure rubber hose, including an inner rubber layer, a first steel wire layer, a middle rubber layer, a second steel wire layer and an outer rubber layer arranged from inside to outside in sequence, the inner rubber layer is made of an inner rubber layer, the middle rubber layer is made of a middle rubber layer, the first steel wire layer and the second steel wire layer are braided by steel wires, and the outer rubber layer is made of an outer rubber layer;

[0007] The outer rubber layer includes the following raw materials in parts by weight:

[0008] Nitrile rubber: 95-110 parts;

[0009] Zinc oxide: 2-8 parts;

[0010] Hard acid ester: 0.2-1.0 parts;

[0011] Antioxidant D: 0.5-1.0 parts;

[0012] Antioxidant D: 0.6-0.9 parts by weight;

[0013] Filler: 50-80 parts by weight;

[0014] Plasticizer: 18-30 parts by weight;

[0015] Dodecyl benzene sulfonic acid: 7-12 parts by weight;

[0016] Vulcanizing agent: 3-7 parts by weight.

[0017] Preferably, the outer rubber layer comprises the following ingredients by weight:

[0018] Nitrile rubber: 99-108 parts by weight;

[0019] Zinc oxide: 4-7 parts by weight;

[0020] Hard acid ester: 0.4-0.9 parts by weight;

[0021] Antioxidant D: 0.6-0.9 parts by weight;

[0022] Antioxidant DFC-34: 0.6-0.9 parts by weight;

[0023] Filler: 60-70 parts by weight;

[0024] Plasticizer: 22-26 parts by weight;

[0025] Dodecyl benzene sulfonic acid: 8-10 parts by weight;

[0026] Vulcanizing agent: 4-6 parts by weight.

[0027] By using the above technical solution, under the cooperation of antioxidant D, antioxidant DFC-34 and dodecyl benzene sulfonic acid, the characteristics of various materials are fully played, thereby improving the wear resistance and weather resistance of the outer rubber layer.

[0028] Regarding the improvement of wear resistance, the inventor speculates that the nitrile rubber is adsorbed on the surface of the filler and chemically combined with the surface, so that the molecular chain of the nitrile rubber is easy to slide on the surface of the filler, but not easy to separate from the filler. Under the cooperation of antioxidant D, antioxidant DFC-34 and dodecyl benzene sulfonic acid, the nitrile rubber is more firmly adsorbed on the surface of the filler, and the degree of chemical combination between the nitrile rubber and the surface of the filler is improved, thereby improving the mechanical properties of the nitrile rubber and increasing its strength, and further improving the wear resistance of the outer rubber layer as a whole.

[0029] As to the improvement of the weather resistance, the inventors guess that the dodecyl benzene sulfonic acid may cause some modification of the antioxidant D and the antioxidant DFC-34, so that the antioxidant D and the antioxidant DFC-34 can reduce the chain breaking or excessive cross-linking of the molecular chain when the oxygen in the rubber is subjected to the radical chain reaction with the rubber molecules, thereby reducing the aging degree of the rubber and improving the weather resistance of the outer layer of the rubber.

[0030] Preferably, the outer layer rubber further comprises the following raw materials in parts by weight:

[0031] Antioxidant SP: 0.3-0.7 parts.

[0032] By adopting the above technical scheme, the antioxidant SP and other raw materials cooperate with each other, especially the antioxidant SP and the dodecyl benzene sulfonic acid, which can further reduce the influence of oxygen on the separation of the rubber, reduce the degree of chain breaking or excessive cross-linking, and thus improve the weather resistance and wear resistance of the outer layer rubber.

[0033] Preferably, the steel wire braided high-pressure rubber tube further comprises the following raw materials in parts by weight:

[0034] Sodium lauroyl glutamate: 2-6 parts.

[0035] By adopting the above technical scheme, under the mutual cooperation of sodium lauroyl glutamate, dodecyl benzene sulfonic acid, antioxidant D and antioxidant DFC-34, the interfacial tension can be further reduced, the repulsive force between particles can be increased, the reaction of various raw materials during preparation can be more stable, and the efficacy of the antioxidant can be fully exerted, thereby improving the performance of the outer layer rubber, especially the wear resistance and weather resistance.

[0036] In a second aspect, the application provides a preparation method of a preparation process of a steel wire braided high-pressure rubber tube, which adopts the following technical scheme:

[0037] A preparation process of a steel wire braided high-pressure rubber tube, comprising the following steps:

[0038] Step 1): press the inner layer rubber into an inner tube;

[0039] Step 2): braid the steel wires outside the inner tube to form a first steel wire layer, wrap the middle layer rubber outside the first steel wire layer, and braid the steel wires outside the middle layer rubber to form a second steel wire layer;

[0040] Step 3): wrap the outer layer rubber outside the second steel wire layer;

[0041] Step 4): wind the flexible member outside the outer layer rubber to obtain a pipe to be used;

[0042] Step 5): vulcanize the pipe to be used, and after vulcanization, remove the flexible member to obtain a finished product.

[0043] By adopting the technical scheme, the middle layer glue arranged between the first steel wire layer and the second steel wire layer can separate and stabilize the steel wire layers, so that the structure of the rubber tube is more stable. In addition, the first steel wire layer, the middle layer glue, the second steel wire layer and the outer layer glue are arranged outside the inner tube, and then the flexible member is wound and vulcanized together, so that the combination between the layers is more compact and firm.

[0044] Preferably, the vulcanization time in step 5) is 70-90 minutes, and the vulcanization temperature is 155-175 degrees Celsius.

[0045] By adopting the technical scheme, under suitable vulcanization conditions, each part of the rubber tube can be better shaped and combined, thereby better improving the wear resistance and weather resistance of the outer rubber layer, and also facilitating the improvement of the overall wear resistance of the rubber tube.

[0046] Preferably, the to-be-used tube after vulcanization is subjected to cold water spraying treatment, the cold water temperature is 5-15 degrees Celsius, and the spraying time is 30-45 minutes.

[0047] By adopting the technical scheme, the cold water spraying is used to accelerate the cooling speed of the rubber tube, reduce the over-vulcanization phenomenon of the rubber tube, and make the product inside and outside uniformly heated in the later vulcanization stage, thereby further improving the wear resistance and weather resistance of the rubber tube.

[0048] Preferably, the outer layer glue is prepared by the following steps:

[0049] Step a): plasticizing the nitrile rubber,

[0050] Step b): co-mixing the plasticized nitrile rubber and other raw materials to obtain a mixed rubber;

[0051] Step c): filtering and sheeting the mixed rubber to obtain a to-be-used glue;

[0052] Step d): calendering the to-be-used glue to obtain the outer layer glue.

[0053] By adopting the technical scheme, the outer layer glue after calendering has increased plasticity, which is convenient for the staff to wrap the outer layer glue outside the second steel wire layer, so that the subsequent process is easier to operate, and the size and thickness of the formed outer rubber layer are also more stable.

[0054] In summary, the present application has the following beneficial effects:

[0055] 1. Under the cooperation of antioxidant D, antioxidant DFC-34 and dodecylbenzenesulfonic acid, the reinforcing effect of the filler can be improved, thereby improving the wear resistance of the outer rubber layer. At the same time, the properties of various materials are fully played, thereby improving the weather resistance of the outer rubber layer.

[0056] 2、The anti-aging agent SP and other raw materials cooperate with each other, especially the anti-aging agent SP and other anti-aging agents cooperate with each other, which can further reduce the influence of oxygen on the separation of the rubber, reduce the degree of molecular chain rupture or excessive crosslinking, so that the wear resistance of the outer layer of the rubber is improved.

[0057] 3、In the mutual cooperation of sodium lauroyl glutamate, dodecylbenzenesulfonic acid, anti-aging agent D and anti-aging agent DFC-34, the interfacial tension can be further reduced, the repulsive force between particles can be increased, so that various raw materials can more stably react during preparation, thereby improving the performance of the outer layer rubber, especially the wear resistance and weather resistance. BRIEF DESCRIPTION OF DRAWINGS

[0058] Figure 1 is a sectional view of a steel wire braided high-pressure rubber hose prepared in the present application.

[0059] Explanation of reference signs: 1, inner layer of rubber; 2, first steel wire layer; 3, middle layer of rubber; 4, second steel wire layer; 5, outer layer of rubber. DETAILED DESCRIPTION

[0060] The present application will be further described in detail below in combination with the drawings and examples.

[0061] The source information of the raw materials used in the following preparation examples and comparative examples is shown in Table 1.

[0062] Table 1

[0063] Raw materials Model Source information Butyl rubber 1052 Shanghai Lishenhang International Trade Co., Ltd. Hard acid ester / Zibo Fengsen Oil and Fat Chemical Co., Ltd. Antioxidant RD / Shijiazhuang Jinhe Nanometer Chemical Co., Ltd. Antioxidant D / Shanghai Chengjin Chemical Co., Ltd. Antioxidant DFC-34 / Gaoyi Fangyi Chemical Auxiliary Co., Ltd. Antioxidant SP / Haian Petroleum Chemical Factory in Jiangsu Province Carbon black N774 Guangzhou Liben Rubber Raw Material Trade Co., Ltd. White carbon black 4561 Weifang Dakang Chemical Co., Ltd. Coumarone resin GB-006 Cangzhou Guangbo Chemical Co., Ltd. RX-80 resin 05 Hengshui Zehao Rubber Chemical Co., Ltd. Coal tar 8007-45-2 Nantong Runfeng Petroleum Chemical Co., Ltd. Sulfur / Luoyang Tianzhidao New Material Technology Co., Ltd. Vulcanizing agent DTDM 103-34-4 Nantong Runfeng Petroleum Chemical Co., Ltd. Dodecyl benzene sulfonic acid Jintong Guangzhou Baishui Chemical Co., Ltd. Sodium lauroyl glutamate Gaoliang Guangdong Gaoliang Technology Co., Ltd.

[0064] Preparation Example

[0065] Preparation Example 1

[0066] The preparation method of the inner layer rubber is as follows:

[0067] Take 105 kg of nitrile rubber, 4 kg of zinc oxide, 0.4 kg of hard acid ester, 1.0 kg of anti-aging agent RD, 55 kg of carbon black, 20 kg of coumarone resin, and 2 kg of vulcanizing agent DTDM.

[0068] Use the internal mixer to plasticize the nitrile rubber, the plasticizing time is 5 minutes, and the plasticizing temperature is 68 degrees Celsius. Mix the plasticized nitrile rubber and the remaining raw materials together, and then use the internal mixer to mix, the mixing time is 10 minutes, and the mixing temperature is 95 degrees Celsius. After mixing, the inner layer rubber is obtained, filtered, sheeted, and stored for use.

[0069] Preparation Example 2

[0070] The preparation method of the middle layer rubber is as follows:

[0071] Take 105 kg of nitrile rubber, 4.5 kg of zinc oxide, 0.5 kg of hard acid ester, 1.5 kg of antioxidant RD, 40 kg of carbon black, 25 kg of coumarone resin, 1.5 kg of vulcanizing agent DTDM.

[0072] The nitrile rubber is plasticized by using an internal mixer, the plasticizing time is 4 minutes, and the plasticizing temperature is 50 degrees Celsius. The plasticized nitrile rubber and the remaining raw materials are mixed together, and then mixed by using an internal mixer, the mixing time is 9 minutes, and the mixing temperature is 60 degrees Celsius. After mixing is completed, the middle layer mixing rubber is obtained, filtered, sheeted, and parked for use.

[0073] The middle layer mixing rubber is calendered by using a calender to obtain the middle layer rubber.

[0074] Preparation Example 3-5

[0075] The preparation method of the outer layer rubber is as follows:

[0076] Step a): The nitrile rubber is plasticized by using an internal mixer, the plasticizing time is 6 minutes, and the plasticizing temperature is 55 degrees Celsius. The specific amount of nitrile rubber is referred to Table 2.

[0077] Step b): The plasticized nitrile rubber and other raw materials are mixed by using an internal mixer, the specific amount of raw materials is referred to Table 2, the mixing time is 6 minutes, and the mixing temperature is 55 degrees Celsius, to obtain the mixing rubber; Step c): The mixing rubber is filtered and sheeted to obtain the rubber for use.

[0078] Step d): The rubber for use is calendered by using a calender to obtain the outer layer rubber.

[0079]

[0080]

[0081] Preparation Example 8

[0082] The outer layer rubber is different from that of Preparation Example 5 in that the preparation raw materials of the outer layer rubber further include 0.3 kg of antioxidant SP.

[0083] Preparation Example 9

[0084] The outer layer rubber is different from that of Preparation Example 5 in that the preparation raw materials of the outer layer rubber further include 0.7 kg of antioxidant SP.

[0085] Preparation Example 10

[0086] The outer layer rubber is different from that of Preparation Example 5 in that the preparation raw materials of the outer layer rubber further include 0.5 kg of antioxidant SP.

[0087] Preparation Example 11

[0088] The outer layer rubber is different from that of Preparation Example 5 in that the preparation raw material of the outer layer rubber further includes 2 kg of sodium lauroyl glutamate.

[0089] Preparation Example 12

[0090] The outer layer rubber is different from that of Preparation Example 5 in that the preparation raw material of the outer layer rubber further includes 6 kg of sodium lauroyl glutamate.

[0091] Preparation Example 13

[0092] The outer layer rubber is different from that of Preparation Example 5 in that the preparation raw material of the outer layer rubber further includes 3 kg of sodium lauroyl glutamate.

[0093] Preparation Example 14

[0094] The outer layer rubber is different from that of Preparation Example 10 in that the preparation raw material of the outer layer rubber further includes 3 kg of sodium lauroyl glutamate.

[0095] Example

[0096] Example 1

[0097] Reference Figure 1 A steel wire braided high-pressure rubber hose includes, from inside to outside, a rubber inner layer 1, a first steel wire layer 2, a rubber middle layer 3, a second steel wire layer 4, and a rubber outer layer 5. The rubber inner layer 1 is made of inner layer rubber, the first steel wire layer 2 and the second steel wire layer 4 are respectively braided by steel wires, the rubber middle layer 3 is made of middle layer rubber, and the rubber outer layer 5 is made of outer layer rubber.

[0098] A preparation process of a steel wire braided high-pressure rubber hose includes the following steps:

[0099] Step 1): extruding the inner layer rubber on the inner tube core by using an extruder to obtain an inner tube, wherein the inner layer rubber is prepared by Preparation Example 1.

[0100] Step 2): braiding the steel wires on the outside of the inner tube to form the first steel wire layer 2, wrapping the middle layer rubber after calendering on the outside of the first steel wire layer 2, braiding the steel wires on the outside of the middle layer rubber to form the second steel wire layer 4, and braiding the first steel wire layer 2 and the second steel wire layer 4 into a mesh shape. The middle layer rubber is prepared by Preparation Example 2.

[0101] Step 3): wrapping the outer layer rubber on the outside of the second steel wire layer 4, wherein the outer layer rubber is prepared by Preparation Example 3.

[0102] Step 4): winding the flexible member on the outside of the outer layer rubber to obtain a hose to be used, and in this embodiment, the flexible member is a water cloth.

[0103] Step 5): vulcanizing the hose to be used, the vulcanization time is 70 minutes, the vulcanization temperature is 155 degrees Celsius, after the vulcanization is completed, the water cloth is unwound and is placed to room temperature for cooling to obtain a finished product.

[0104] Example 2

[0105] A steel wire braided high pressure hose, which is different from Example 1 in that the outer layer rubber is prepared by Preparation Example 4, the vulcanization time is 90 minutes, and the vulcanization temperature is 175 degrees Celsius.

[0106] Example 3

[0107] A steel wire braided high pressure hose, which is different from Example 1 in that the outer layer rubber is prepared by Preparation Example 5, the vulcanization time is 85 minutes, and the vulcanization temperature is 160 degrees Celsius.

[0108] Example 4

[0109] A steel wire braided high pressure hose, which is different from Example 3 in that the outer layer rubber is prepared by Preparation Example 6.

[0110] Example 5

[0111] A steel wire braided high pressure hose, which is different from Example 3 in that the outer layer rubber is prepared by Preparation Example 7.

[0112] Example 6

[0113] A steel wire braided high pressure hose, which is different from Example 3 in that the vulcanization time is 100 minutes, and the vulcanization temperature is 185 degrees Celsius.

[0114] Example 7

[0115] A steel wire braided high pressure hose, which is different from Example 3 in that the vulcanized pipe to be used is subjected to cold water spraying treatment, the cold water temperature is 10 degrees Celsius, and the spraying time is 38 minutes.

[0116] Example 8

[0117] A steel wire braided high pressure hose, which is different from Example 3 in that the vulcanized pipe to be used is subjected to cold water spraying treatment, the cold water temperature is 15 degrees Celsius, and the spraying time is 45 minutes.

[0118] Example 9

[0119] A steel wire braided high pressure hose, which is different from Example 3 in that the vulcanized pipe to be used is subjected to cold water spraying treatment, the cold water temperature is 5 degrees Celsius, and the spraying time is 30 minutes.

[0120] Example 10

[0121] A steel wire braided high pressure hose, which is different from Example 3 in that the outer rubber tube is prepared by Preparation Example 8.

[0122] Example 11

[0123] A steel wire braided high pressure hose, which differs from Example 3 in that the rubber outer tube is prepared by Preparation Example 9.

[0124] Example 12

[0125] A steel wire braided high pressure hose, which differs from Example 3 in that the rubber outer tube is prepared by Preparation Example 10.

[0126] Example 13

[0127] A steel wire braided high pressure hose, which differs from Example 3 in that the rubber outer tube is prepared by Preparation Example 11.

[0128] Example 14

[0129] A steel wire braided high pressure hose, which differs from Example 3 in that the rubber outer tube is prepared by Preparation Example 12.

[0130] Example 15

[0131] A steel wire braided high pressure hose, which differs from Example 3 in that the rubber outer tube is prepared by Preparation Example 13.

[0132] Example 16

[0133] A steel wire braided high pressure hose, which differs from Example 3 in that the rubber outer tube is prepared by Preparation Example 14, and the hose after vulcanization is subjected to cold water spraying treatment, the cold water temperature is 5 degrees Celsius, and the spraying time is 30 minutes.

[0134] Comparative Example

[0135] Comparative Example 1

[0136] A steel wire braided high pressure hose, which differs from Example 3 in that the rubber outer layer does not include anti-aging agent D in the formula.

[0137] Comparative Example 2

[0138] A steel wire braided high pressure hose, which differs from Example 3 in that the rubber outer layer does not include anti-aging agent DFC-34 in the formula.

[0139] Comparative Example 3

[0140] A steel wire braided high pressure hose, which differs from Example 3 in that the rubber outer layer does not include dodecyl benzene sulfonic acid in the formula.

[0141] Performance test test

[0142] The steel wire braided high pressure hose is assembled with a metal pipe joint of a general structure, and a steel wire braided high pressure hose with a steel wire braided inner diameter of 19 mm*2 layers of steel wire is taken.

[0143] Weather resistance detection: The examples 1-16 and the comparative examples 1-3 were detected by GB / T11206-2009 "Rubber aging test surface cracking method", and the cracking grade evaluation was referred to Table 3-4.

[0144] Table 3-Grade of surface cracking width of sample

[0145]

[0146] Table 4-Grade of surface cracking density of sample

[0147]

[0148] Wear resistance detection: The examples 1-16 and the comparative examples 1-3 were detected by GB / T1689-2014 "Determination of wear resistance of vulcanized rubber (using Akron abrasion tester)", and the wear volume of sample was obtained.

[0149] Table 5-Test detection data of examples 1-5 and comparative examples 1-3

[0150]

[0151] According to the data comparison of examples 1-5 and comparative examples 1-3 in Table 5, under the common cooperation of antioxidant D, antioxidant DFC-34 and dodecyl benzene sulfonic acid, the weather resistance and wear resistance of the outer rubber are greatly improved. The inventors speculate that it may be because the common cooperation of the three improves the reinforcing effect of the filler, thereby strengthening the wear resistance of the outer rubber. In addition, dodecyl benzene sulfonic acid may change the performance of antioxidant D and antioxidant DFC-34, so that the anti-aging effect of antioxidant D and antioxidant DFC-34 is further improved, thereby improving the weather resistance of the outer rubber, and further achieving the effect of prolonging the service life of the steel wire braided high pressure rubber hose.

[0152] Table 6-Test detection data of example 3 and example 6

[0153]

[0154] According to the data comparison of example 3 and example 6 in Table 6, when the vulcanization time is 70-90 minutes and the vulcanization temperature is 155-175 degrees Celsius, the weather resistance and wear resistance of the outer rubber are better.

[0155] Table 7-Test detection data of example 3 and examples 7-9

[0156]

[0157] According to the comparison of the data of example 3 and example 7-9 in table 7, it can be seen that the wear resistance and wear effect of the outer rubber of the steel wire braided high pressure rubber hose with cold water spraying are better than that of the room temperature direct cooling. Among them, the wear resistance of example 9 is better.

[0158] Table 8-test data of example 3 and example 10-12

[0159]

[0160] According to the comparison of the data of example 3 and example 10-12 in table 8, under the cooperation of anti-aging agent SP and other raw materials, the crack width and crack density grade of the outer rubber are improved to different degrees, which shows that it makes the outer rubber have a better weather resistance and wear resistance.

[0161] Table 9-test data of example 3 and example 13-16

[0162]

[0163]

[0164] According to the comparison of the data of example 3 and example 13-15 in table 9, under the cooperation of sodium lauroyl glutamate, dodecyl benzene sulfonic acid, anti-aging agent D and anti-aging agent DFC-34, it is possible to make various raw materials react more stably during preparation, thereby improving the performance of the outer rubber, especially the wear resistance and weather resistance.

[0165] The specific embodiment is only an explanation of the present application, which is not a limitation of the present application, and those skilled in the art can make non-creative contribution modifications to the present embodiment according to the needs after reading the present specification, but as long as it is within the scope of the claims of the present application, it is protected by the patent law.

Claims

1. A steel wire braided high pressure hose characterized by, The steel wire braided high pressure rubber tube comprises, from inside to outside, a rubber inner layer (1), a first steel wire layer (2), a rubber middle layer (3), a second steel wire layer (4) and a rubber outer layer (5), wherein the rubber inner layer (1) is made of inner layer rubber, the rubber middle layer (3) is made of middle layer rubber, the first steel wire layer (2) and the second steel wire layer (4) are braided by steel wires, and the rubber outer layer (5) is made of outer layer rubber; The outer layer rubber is made of the following raw materials in parts by weight: Nitrile rubber: 99-108 parts; Zinc oxide: 4-7 parts; Hard acid ester: 0.4-0.9 parts; Anti-aging agent D: 0.6-0.9 parts; Anti-aging agent DFC-34: 0.6-0.9 parts; Filler: 60-70 parts; Plasticizer: 22-26 parts; Dodecyl benzene sulfonic acid: 8-10 parts; Vulcanizing agent: 4-6 parts; Anti-aging agent SP: 0.3-0.7 parts; Sodium lauroyl glutamate: 2-6 parts; The preparation process of the steel wire braided high pressure rubber tube comprises the following steps: Step 1): pressing the inner layer rubber into an inner tube; Step 2): braiding the steel wires outside the inner tube to form the first steel wire layer (2), wrapping the middle layer rubber outside the first steel wire layer (2), and braiding the steel wires outside the middle layer rubber to form the second steel wire layer (4); Step 3): wrapping the outer layer rubber outside the second steel wire layer (4); Step 4): winding the flexible member outside the outer layer rubber to obtain a tube to be used; Step 5): vulcanizing the tube to be used, and after vulcanization, the flexible member is unwound to obtain the finished product; The outer layer rubber is prepared by the following steps: Step a): plasticizing the nitrile rubber, Step b): co-mixing the plasticized nitrile rubber and other raw materials to obtain a mixed rubber; Step c): filtering and sheeting the mixed rubber to obtain a rubber to be used; Step d): calendering the rubber to be used to obtain the outer layer rubber.

2. The steel wire braided high pressure hose according to claim 1, characterized in that: The vulcanization time in step 5) is 70-90 minutes, and the vulcanization temperature is 155-175 degrees Celsius.

3. The steel wire braided high pressure hose according to claim 1, characterized in that: The tube to be used after vulcanization is subjected to cold water spraying treatment, the cold water temperature is 5-15 degrees Celsius, and the spraying time is 30-45 minutes.

Images