Water-soluble hydraulic support assembly paste and preparation method thereof

Abstract

The invention discloses a water-soluble hydraulic support assembly lubricating grease and a preparation method thereof. The assembly grease for a water-based hydraulic support comprises the following components in percentage by weight: 8-15% of mineral oil; 13.5%-28.1% of mahogany petroleum sulfonate; 12.2 to 18.8% of organic carboxylic acid; 0.2 to 1.5 percent of an antirust agent; 3.6%-6.6% of a non-ionic surface active agent; 5.3 to 8.5 percent of alcohol amine; 4.5-8.5% of fatty alcohol and the balance of soft water.

Description

Technical Field

[0001] The invention relates to the technical field of hydraulic support assembly lubrication, and in particular to a water-soluble hydraulic support assembly lubricating paste and a preparation method thereof. Background Art

[0002] Hydraulic supports are widely used in comprehensive mechanized coal mining faces in coal mines due to their large supporting capacity, good supporting performance, fast erection and moving speed, and safety and reliability. Seals are a very important component of the hydraulic system. In addition to preventing oil leakage and ensuring the normal and smooth operation of the hydraulic system, they can also prevent impurities such as dust, water, and sediment from entering the hydraulic system and maintain the cleanliness of the system. In addition, seals can reduce the friction between the various hydraulic components in the system, thereby improving the efficiency of the system. During the assembly process, seals require a certain amount of lubrication to reduce the friction between the seals and other components to prevent wear. In addition, lubricants also help seals maintain their elasticity, making the installation process easier.

[0003] After the hydraulic support is assembled, it is directly put into the well and filled with mining support fluid as the hydraulic medium after pressure testing. During the operation of the hydraulic support, the sealing components will be in direct contact with the water-based support fluid as the hydraulic medium. The poor water solubility of the lubricant used and its incompatibility with the hydraulic support fluid will affect the normal and stable operation of the hydraulic system.

[0004] At present, calcium-based or lithium-based esters are commonly used as lubricating media. This type of grease uses mineral oil as the base oil and metal soap as the thickener. It has good lubricity, but this type of grease is incompatible with the water-based bracket fluid used in the hydraulic system, which can easily cause oil and soap separation, filter clogging, and valve jamming.

[0005] CN107760416A discloses a water-soluble hydraulic support assembly lubricating grease and a preparation method thereof, wherein the lubricating grease comprises the following components in weight percentage: 14-16% oleic acid, 8-10% sebacic acid, 58-68% triethanolamine, 1.5-3% polyoxyethylene sorbitan monooleate, 1.5-3% sodium dodecylbenzene sulfonate, 3-5% sodium tetraborate, and 3-5% ethylenediamine. Although the assembly lubricating grease has good water solubility and is compatible with the hydraulic support fluid, it requires high-temperature reaction preparation, has a complex process, and consumes a lot of energy.

[0006] CN103242949A discloses an environmentally friendly water-based grease and a preparation method thereof. The water-based grease comprises: a base liquid obtained by mixing a water-soluble polyether with a mass ratio of 65-90% and distilled water; a mixed soap thickener generated by reacting 1-4% calcium hydroxide and 0.5-1.5% sodium hydroxide with 6.5-24.5% stearic acid; an extreme pressure anti-wear agent with a mass ratio of 0.5-3%, and a rust inhibitor with a mass ratio of 0.02-2%. The water-based grease has the advantages of good lubricity and adhesion, good heat transfer and cooling effects, and is easy to clean. It is suitable for metal stamping and extrusion processing, metal rolling, metal wire drawing, metal pipe processing and other occasions, which require cleaning to remove the grease and are not suitable for underground operations.

[0007] Therefore, developing a water-based assembly lubricating paste with good lubrication performance, easy assembly operation, compatibility with mine hydraulic support fluid, and easy production and manufacturing is the focus of research in this field. Summary of the invention

[0008] In view of the shortcomings of the prior art, the present invention aims to provide an assembly paste for a water-based hydraulic support and a preparation method thereof. The assembly paste has good water solubility, is compatible with the support fluid, and has an energy-saving and environmentally friendly preparation process, wherein the assembly paste for the water-based hydraulic support comprises the following components in weight percentage:

[0009] Mineral oil 8-15%;

[0010] Petroleum sulfonate 13.5-28.1%;

[0011] Organic carboxylic acid 12.2-18.8%;

[0012] Rust inhibitor 0.2-1.5%;

[0013] Nonionic surfactant 3.6-6.6%;

[0014] Alkylamine 5.3-8.5%;

[0015] Fatty alcohol 4.5-8.5%, the balance is soft water.

[0016] In a preferred embodiment, the mineral oil is paraffin-based or naphthenic oil, and the viscosity is one of 32, 40 or 80 mm2 / s or a mixture of at least two of them.

[0017] In a preferred embodiment, the petroleum sulfonate is natural sodium petroleum sulfonate or synthetic sodium petroleum sulfonate, and the molecular weight is 450 or 550, or a combination of the two.

[0018] In a preferred embodiment, the organic carboxylic acid compound is a polybasic acid of a monobasic acid and / or a dibasic acid.

[0019] In a preferred embodiment, the polyacid is any one of adipic acid, sebacic acid, azelaic acid or C18-C22 dimer acid, or a combination of at least two thereof.

[0020] In a preferred embodiment, the rust inhibitor is selected from any one or a combination of at least two of benzotriazole, methylbenzotriazole, benzotriazole derivatives, N-[(5-methyl-1H-benzotriazole-1-yl)methyl]diethanolamine or dithiothiazol salts, more preferably benzotriazole.

[0021] In a preferred embodiment, the nonionic surfactant is any one of isomeric dodecanol polyoxyethylene ether, isomeric tridecanol polyoxyethylene ether or isomeric pentadecanol polyoxyethylene ether, or a combination of at least two thereof; more preferably, it is isomeric tridecanol polyoxyethylene ether.

[0022] In a preferred embodiment, the alcoholamine is selected from any one of monoethanolamine, triethanolamine or isopropanolamine, or a combination of at least two thereof.

[0023] In a preferred embodiment, the fatty alcohol is selected from any one or a combination of at least two of diethylene glycol, glycerol or propylene glycol;

[0024] According to another aspect of the present invention, the present invention provides a method for preparing a water-soluble hydraulic support assembly lubricating paste, the method comprising:

[0025] S1001, adding an organic carboxylic acid compound and an alcoholamine compound to mineral oil, stirring until the exothermic temperature is stable, adding petroleum sulfonate, a nonionic surfactant, and a premixed rust inhibitor, and stirring evenly;

[0026] S1002, slowly adding soft water to the above system, and stopping stirring after the phase is reversed to obtain the water-soluble hydraulic support assembly lubricating paste, wherein the water-soluble hydraulic support assembly lubricating paste comprises the following components in weight percentage:

[0027] Mineral oil 8-15%;

[0028] Petroleum sulfonate 13.5-28.1%;

[0029] Organic carboxylic acid 12.2-18.8%;

[0030] Rust inhibitor 0.2-1.5%;

[0031] Nonionic surfactant 3.6-6.6%;

[0032] Alkylamine 5.3-8.5%;

[0033] Fatty alcohol 4.5-8.5%, the balance is soft water.

[0034] In a preferred embodiment, in step S1001, after neutralization into salt according to the adding order, an emulsifier is added and stirred evenly;

[0035] In a preferred embodiment, in step S1002, after the phase inversion is completed and the mixture is thickened into a uniform paste, the addition of water can be stopped and the mixture can be stirred evenly. DETAILED DESCRIPTION

[0036] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art can think of other obvious variations. The basic principles of the present invention defined in the following description can be applied to other embodiments, variations, improvements, equivalents, and other technical solutions that do not deviate from the spirit and scope of the present invention.

[0037] An assembly paste for a water-based hydraulic support according to a preferred embodiment of the present invention will be described in detail below, wherein the assembly paste for a water-based hydraulic support includes the following components in weight percentage:

[0038] Mineral oil 8-15%;

[0039] Petroleum sulfonate 13.5-28.1%;

[0040] Organic carboxylic acid 12.2-18.8%;

[0041] Rust inhibitor 0.2-1.5%;

[0042] Nonionic surfactant 3.6-6.6%;

[0043] Alkylamine 5.3-8.5%;

[0044] Fatty alcohol 4.5-8.5%, the balance is soft water.

[0045] In a preferred embodiment, the mineral oil is a paraffinic or naphthenic oil, preferably with a viscosity of 32, 40 or 80 mm 2 / s or a mixture of at least two.

[0046] In a preferred embodiment, the petroleum sulfonate is natural sodium petroleum sulfonate or synthetic sodium petroleum sulfonate, and the molecular weight is 450 or 550, or a combination of the two.

[0047] In a preferred embodiment, the organic carboxylic acid compound is a polybasic acid of a monobasic acid and / or a dibasic acid.

[0048] In a preferred embodiment, the polyacid is any one of adipic acid, sebacic acid, azelaic acid or C18-C22 dimer acid, or a combination of at least two thereof.

[0049] In a preferred embodiment, the rust inhibitor is selected from any one or a combination of at least two of benzotriazole, methylbenzotriazole, benzotriazole derivatives, N-[(5-methyl-1H-benzotriazole-1-yl)methyl]diethanolamine or dithiothiazol salts, more preferably benzotriazole.

[0050] In a preferred embodiment, the nonionic surfactant is any one of isomeric dodecanol polyoxyethylene ether, isomeric tridecanol polyoxyethylene ether or isomeric pentadecanol polyoxyethylene ether, or a combination of at least two thereof; more preferably, it is isomeric tridecanol polyoxyethylene ether.

[0051] In a preferred embodiment, the alcoholamine is selected from any one of monoethanolamine, triethanolamine or isopropanolamine, or a combination of at least two thereof.

[0052] In a preferred embodiment, the fatty alcohol is selected from any one or a combination of at least two of diethylene glycol, glycerol or propylene glycol;

[0053] According to another aspect of the present invention, the present invention provides a method for preparing a water-soluble hydraulic support assembly lubricating paste, the method comprising:

[0054] S1001, adding an organic carboxylic acid compound and an alcoholamine compound to mineral oil, stirring until the exothermic temperature is stable, adding petroleum sulfonate, a nonionic surfactant, and a premixed rust inhibitor, and stirring evenly;

[0055] S1002, slowly adding soft water to the above system, and stopping stirring after the phase is reversed to obtain the water-soluble hydraulic support assembly lubricating paste, wherein the water-soluble hydraulic support assembly lubricating paste comprises the following components in weight percentage:

[0056] Mineral oil 8-15%;

[0057] Petroleum sulfonate 13.5-28.1%;

[0058] Organic carboxylic acid 12.2-18.8%;

[0059] Rust inhibitor 0.2-1.5%;

[0060] Nonionic surfactant 3.6-6.6%;

[0061] Alkylamine 5.3-8.5%;

[0062] Fatty alcohol 4.5-8.5%, the balance is soft water.

[0063] In a preferred embodiment, in step S1001, after neutralization into salt according to the adding order, an emulsifier is added and stirred evenly;

[0064] In a preferred embodiment, in step S1002, after the phase inversion is completed and the mixture is thickened into a uniform paste, the addition of water can be stopped and the mixture can be stirred evenly.

[0065] Example 1

[0066] This embodiment provides a water-soluble hydraulic support assembly paste. Taking the mass of the assembly paste as 100%, the preparation method of the assembly paste in this embodiment specifically includes the following steps:

[0067] 13% of 22# cycloalkyl oil, 14.5% of tall oil acid, 3.3% of octanoic acid, and 5.9% of triethanolamine are mixed according to the proportion, stirred until uniform, and then 17.1% of synthetic petroleum sulfonate and 4.8% of isotridecyl polyoxyethylene ether are added, and the mixture is stirred until uniform, and then 0.5% of benzotriazole and 6.2% of fatty alcohol are added, and the mixture is stirred until uniform; then soft water is slowly added until the phase inversion thickens, and the assembly paste is obtained. The assembly paste is a dark brown paste, close to No. 0 grease, and is easy to apply evenly.

[0068] Example 2

[0069] This embodiment provides a water-soluble hydraulic support assembly paste. Taking the mass of the assembly paste as 100%, the preparation method of the assembly paste in this embodiment specifically includes the following steps:

[0070] 11.5% of 22# cycloalkyl oil, 10.9% of oleic acid, 4.1% of capric acid and 6.6% of triethanolamine are mixed in proportion and stirred until uniform. Then, 14.2% of synthetic petroleum sulfonate and 5.1% of isotridecyl polyoxyethylene ether are added and stirred until uniform. Then, 0.5% of benzotriazole and 7.3% of fatty alcohol are added and stirred until uniform. Then, soft water is slowly added until phase inversion and thickening occurs to obtain the assembly paste.

[0071] Performance Testing

[0072] The hydraulic support assembly paste needs to play a lubricating role during the assembly process, facilitate the installation of seals, and also needs to play a good role in rust and corrosion resistance, especially at the joints, there may be galvanized parts or copper in addition to carbon steel; after the installation is completed and the pressure test is completed, as the hydraulic support starts to operate, the residual assembly paste needs to have good compatibility with the frame bracket fluid. Therefore, the assembly pastes provided in the above embodiments 1-2 are respectively subjected to the following performance tests, referring to ISO 12922 "Lubricants, industrial lubricants and related products (Class L). Group H (hydraulic systems). Specifications for HFAE, HFAS, HFB, HFC, HFDR and HFDU" for rubber compatibility and metal corrosion resistance, and the compatibility and lubricity test with the hydraulic support fluid is tested with reference to MT 76-2011 "Emulsified oil, concentrate and high water content hydraulic fluid for hydraulic supports".

[0073] The specific test results are shown in Table 1-2 below, "√" means the test is qualified:

[0074] Table 1

[0075]

[0076] Comparative Example 1

[0077] This comparative example provides a water-soluble hydraulic support assembly paste, which is different from Example 1 only in that no premixing is performed, and each material is added in sequence, and the content of each component is the same as that of Example 1.

[0078] Comparative Example 2

[0079] This comparative example provides a water-soluble hydraulic support assembly paste, which is different from Example 1 only in that the content of the nonionic surfactant (isomeric tridecyl polyoxyethylene ether) is reduced to 1.5%, and the contents of other components and the preparation method are the same as those in Example 1.

[0080]

[0081] It should be understood by those skilled in the art that the above-described embodiments of the present invention are only examples and do not limit the present invention. The advantages of the present invention have been fully and effectively realized. The functional and structural principles of the present invention have been demonstrated and explained in the embodiments, and the embodiments of the present invention may be deformed or modified in any way without departing from the principles.

Claims

1. Assembly paste for water-based hydraulic support, It is characterized in that It includes the following components in weight percentage: Mineral oil 8-15%; Petroleum sulfonate 13.5-28.1%; Organic carboxylic acid 12.2-18.8%; Rust inhibitor 0.2-1.5%; Nonionic surfactant 3.6-6.6%; Alkylamine 5.3-8.5%; Fatty alcohol 4.5-8.5%, the balance is soft water.

2. The assembly paste for water-based hydraulic support according to claim 1, It is characterized in that The mineral oil is paraffin-based or naphthenic oil, and has a viscosity of 32, 40 or 80 mm2 / s or a mixture of at least two of them.

3. The assembly paste for water-based hydraulic support according to claim 1, It is characterized in that The petroleum sulfonate is natural sodium petroleum sulfonate or synthetic sodium petroleum sulfonate, and the molecular weight is 450 or 550, or a combination of the two.

4. The assembly paste for water-based hydraulic support according to claim 1, It is characterized in that The organic carboxylic acid compound is a polybasic acid of a monobasic acid and / or a dibasic acid.

5. The assembly paste for water-based hydraulic support according to claim 4, It is characterized in that The polyacid is any one of adipic acid, sebacic acid, azelaic acid or C18-C22 dimer acid or a combination of at least two thereof.

6. The assembly paste for water-based hydraulic support according to claim 1, It is characterized in that The rust inhibitor is selected from any one of benzotriazole, methylbenzotriazole, benzotriazole derivatives, N-[(5-methyl-1H-benzotriazole-1-yl)methyl]diethanolamine or dithiothiazol salts or a combination of at least two thereof.

7. The assembly paste for water-based hydraulic support according to claim 1, It is characterized in that The nonionic surfactant is any one of isomeric dodecanol polyoxyethylene ether, isomeric tridecanol polyoxyethylene ether or isomeric pentadecanol polyoxyethylene ether, or a combination of at least two thereof.

8. The assembly paste for water-based hydraulic support according to claim 1, It is characterized in that The alcohol amine is selected from any one of monoethanolamine, triethanolamine or isopropanolamine or a combination of at least two thereof; the fatty alcohol is selected from any one of diethylene glycol, glycerol or propylene glycol or a combination of at least two thereof.

9. Preparation method of water-soluble hydraulic support assembly lubricating paste, It is characterized in that The method comprises: S1001, adding an organic carboxylic acid compound and an alcoholamine compound to mineral oil, stirring until the exothermic temperature is stable, adding petroleum sulfonate, a nonionic surfactant, and a premixed rust inhibitor, and stirring evenly; S1002, slowly adding soft water to the above system, and stopping stirring after the phase is reversed to obtain the water-soluble hydraulic support assembly lubricating paste, wherein the water-soluble hydraulic support assembly lubricating paste comprises the following components in weight percentage: Mineral oil 8-15%; Petroleum sulfonate 13.5-28.1%; Organic carboxylic acid 12.2-18.8%; Rust inhibitor 0.2-1.5%; Nonionic surfactant 3.6-6.6%; Alkylamine 5.3-8.5%; Fatty alcohol 4.5-8.5%, the balance is soft water.

10. The method for preparing the assembly paste for the water-based hydraulic support according to claim 9, It is characterized in that In step S1001, after neutralization into salt according to the order of adding materials, emulsifier is added and stirred evenly; In step S1002, after the phase inversion is completed and the mixture is thickened into a uniform paste, the addition of water can be stopped and the mixture can be stirred evenly.

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