Mining joint sleeve

Abstract

The utility model provides a mining joint sleeve, and relates to the technical field of joint sleeves, the mining joint sleeve comprises a joint sleeve, a sealing connecting pipe is fixedly mounted on the inner side of the joint sleeve, a butt joint pipeline is arranged below the joint sleeve, and the butt joint pipeline is aligned to the position of the sealing connecting pipe for insertion; after insertion, the butt joint pipeline and the threaded sealing connecting pipe can be rotated, so that an internal thread above the threaded sealing connecting pipe is meshed with an external thread above the joint sleeve, and quick connection between the joint sleeve and the butt joint pipeline can be realized; the second sealing rubber ring above the butt joint pipeline can be attached to the first sealing rubber ring above the sealing connecting pipe after being inserted into the inner side of the sealing connecting pipe, and due to the fact that the first sealing rubber ring and the second sealing rubber ring are both designed to be conical, the connecting area of the first sealing rubber ring and the second sealing rubber ring can be large; the sealing effect is good after the joint sleeve and the butt joint pipeline are connected, and the leakage condition is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of joint sleeve especially relates to a mine joint sleeve. BACKGROUND

[0002] In the mine exploitation operation, the connection reliability of hydraulic support, conveying pipeline and other equipment directly influences production safety and efficiency. The traditional mine joint sleeve adopts ordinary carbon steel material, and the following problems are prone to appear under long-term high pressure, vibration and corrosive environment: sealing failure leads to hydraulic oil leakage, and causes equipment failure; the threaded connection part is seriously worn, and the thread is prone to slip after frequent dismounting; the impact resistance is insufficient, and the downhole blasting vibration easily leads to connection loosening; the existing improvement scheme such as increasing the number of sealing rings or adopting surface quenching process still has defects such as complex structure, high manufacturing cost and inconvenient maintenance;

[0003] When in use, the existing device is mostly connected with the joint sleeve and the connecting pipeline through threads, but the setting of the upper sealing rubber ring will generate great resistance when the threads are connected, and the material of the existing joint sleeve cannot effectively resist mechanical impact and fatigue load under the complex mine environment, so that the service life is low, therefore we propose a mine joint sleeve. SUMMARY

[0004] Therefore, the mine joint sleeve is provided, which solves the above technical problems to a certain extent.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0006] A mine joint sleeve, comprising a joint sleeve, a sealing connecting pipe is fixedly installed on the inner side of the joint sleeve, a butt joint pipeline is arranged below the joint sleeve, a threaded sealing connecting pipe is fixedly installed on the outer side of the butt joint pipeline, an external thread is formed on the outer side of the joint sleeve, an internal thread is formed on the inner wall of the threaded sealing connecting pipe, a first sealing rubber ring is fixedly installed on the top of the butt joint pipeline, a second sealing rubber ring is fixedly installed on the top inner wall of the sealing connecting pipe, and the joint sleeve comprises a reinforced outer layer and a sealing inner layer.

[0007] Preferably, the reinforced outer layer comprises a high-strength alloy steel base layer, a corrosion-resistant coating intermediate layer and a wear-resistant ceramic outer layer, the corrosion-resistant coating intermediate layer is fixedly connected to one side of the high-strength alloy steel base layer, and the wear-resistant ceramic outer layer is fixedly connected to one side of the corrosion-resistant coating intermediate layer.

[0008] Preferably, the sealing inner layer comprises a flexible rubber buffer layer, an electromagnetic shielding layer and a fireproof and flame-retardant outer layer, the wear-resistant ceramic outer layer is fixedly connected with the flexible rubber buffer layer, the electromagnetic shielding layer is fixedly connected on one side of the flexible rubber buffer layer, and the fireproof and flame-retardant outer layer is fixedly connected on one side of the electromagnetic shielding layer.

[0009] Preferably, the material of the high-strength alloy steel base layer is high-strength alloy steel, the material of the anticorrosive coating intermediate layer is zinc-rich primer, and the material of the wear-resistant ceramic outer layer is alumina ceramic.

[0010] Preferably, the material of the flexible rubber buffer layer is nitrile rubber, the material of the electromagnetic shielding layer is copper-plated iron wire mesh, and the material of the fireproof and flame-retardant outer layer is polyvinyl chloride.

[0011] Preferably, the first sealing rubber ring and the second sealing rubber ring are both conical in shape, and are made of rubber material.

[0012] Preferably, the diameter of the sealing connection pipe is the same as the inner diameter of the second sealing rubber ring.

[0013] Preferably, the inner diameter of the threaded sealing connection pipe is the same as the diameter of the joint sleeve.

[0014] Compared with the prior art, the utility model has the advantages that:

[0015] (1) The joint sleeve for mine is inserted into the position of the sealing connection pipe in alignment with the butt joint pipe, and after insertion, the butt joint pipe and the threaded sealing connection pipe can be rotated, so that the internal thread on the threaded sealing connection pipe is engaged with the external thread on the joint sleeve, the quick connection of the joint sleeve and the butt joint pipe can be realized, and the second sealing rubber ring on the butt joint pipe can be attached to the first sealing rubber ring on the sealing connection pipe after being inserted into the inner side of the sealing connection pipe, because the first sealing rubber ring and the second sealing rubber ring are both conical in design, the connection area of the first sealing rubber ring and the second sealing rubber ring is large, the sealing effect of the joint sleeve and the butt joint pipe after connection is good, and the leakage does not occur.

[0016] (2) The joint sleeve for mine has the high-strength alloy steel base layer as the basic support structure of the sleeve, bears the main stress at the joint, guarantees the overall strength and rigidity of the sleeve, prevents deformation or fracture under the working conditions of high pressure, heavy load and frequent vibration, and has high strength and toughness, can effectively resist mechanical impact and fatigue load under the complex environment of mine, prolongs the service life of the sleeve, and has good machining performance, facilitates manufacturing of the high-precision sleeve size, and ensures the close cooperation with the connecting components. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 A three-dimensional structure schematic view of a mine joint sleeve is provided in the utility model;

[0018] Figure 2 A three-dimensional view of a sectional part structure of a mine joint sleeve is shown according to the embodiment of the application;

[0019] Figure 3 A three-dimensional view of an explosion part structure of a mine joint sleeve is shown according to the embodiment of the application;

[0020] Figure 4 A three-dimensional view of a reinforcing outer layer and a sealing inner layer is shown according to the embodiment of the application;

[0021] Figure 5 A three-dimensional view of a part structure of a mine joint sleeve is shown according to the embodiment of the application.

[0022] Reference signs:

[0023] 1, joint sleeve; 2, sealing connection pipe; 3, butt pipe; 4, threaded sealing connection pipe; 5, external thread; 6, internal thread; 7, first sealing rubber ring; 8, second sealing rubber ring; 9, reinforcing outer layer; 10, sealing inner layer; 11, high-strength alloy steel base layer; 12, anticorrosion coating intermediate layer; 13, wear-resistant ceramic outer layer; 14, flexible rubber buffer layer; 15, electromagnetic shielding layer; 16, fireproof flame-retardant outer layer. DETAILED DESCRIPTION

[0024] In order to further understand the invention content, characteristics and effects of the utility model, the following examples are given, and the detailed description is given as follows in combination with the drawings.

[0025] The structure of the utility model is described in detail below in combination with the drawings.

[0026] Reference Figures 1-5 A mine joint sleeve, comprising a joint sleeve 1, a sealing connection pipe 2 is fixedly installed on the inner side of the joint sleeve 1, a butt pipe 3 is arranged below the joint sleeve 1, a threaded sealing connection pipe 4 is fixedly installed on the outer side of the butt pipe 3, an external thread 5 is formed on the outer side of the joint sleeve 1, an internal thread 6 is formed on the inner wall of the threaded sealing connection pipe 4, a first sealing rubber ring 7 is fixedly installed on the top of the butt pipe 3, a second sealing rubber ring 8 is fixedly installed on the inner wall of the top of the sealing connection pipe 2, and the joint sleeve 1 comprises a reinforcing outer layer 9 and a sealing inner layer 10.

[0027] In the embodiment, the reinforced outer layer 9 comprises a high-strength alloy steel base layer 11, an anti-corrosion coating intermediate layer 12 and a wear-resistant ceramic outer layer 13, the anti-corrosion coating intermediate layer 12 is fixedly connected to one side of the high-strength alloy steel base layer 11, and the wear-resistant ceramic outer layer 13 is fixedly connected to one side of the anti-corrosion coating intermediate layer 12; the high-strength alloy steel base layer 11 serves as a basic support structure of the sleeve, bears the main stress at the joint, ensures the overall strength and rigidity of the sleeve, and prevents deformation or fracture under the working conditions of high pressure, heavy load and frequent vibration; the alloy steel has high strength and toughness, can effectively resist mechanical impact and fatigue load under the complex environment of the mine, prolongs the service life of the sleeve, and has good processing performance, which facilitates the manufacture of high-precision sleeve size and ensures the close fit with the connecting components.

[0028] In the embodiment, the sealing inner layer 10 comprises a flexible rubber buffer layer 14, an electromagnetic shielding layer 15 and a fire-retardant outer layer 16, the wear-resistant ceramic outer layer 13 is fixedly connected to the flexible rubber buffer layer 14, the electromagnetic shielding layer 15 is fixedly connected to one side of the flexible rubber buffer layer 14, and the fire-retardant outer layer 16 is fixedly connected to one side of the electromagnetic shielding layer 15; the flexible rubber buffer layer 14 plays a buffering role between the joint sleeve 1 and the butt joint pipeline 3, absorbs and disperses the energy generated due to vibration, impact and the like, and reduces the damage to the sleeve and the connecting components; at the same time, it can also fill the small gaps at the connection site, improve the sealing performance, and the elasticity and oil resistance of the nitrile rubber enable it to adapt to the complex working conditions in the mine, effectively reduce the influence of vibration and impact on the sleeve, prolong the service life of the sleeve and the connecting components, and the good sealing performance can also prevent medium leakage and improve the operation safety of the mine equipment.

[0029] In the embodiment, the material of the high-strength alloy steel base layer 11 is high-strength alloy steel, the material of the anti-corrosion coating intermediate layer 12 is zinc-rich primer, and the material of the wear-resistant ceramic outer layer 13 is alumina ceramic; the anti-corrosion coating intermediate layer 12 forms a dense protective film on the surface of the high-strength alloy steel base layer 11, blocks the contact of water, oxygen and corrosive medium with the base metal, prevents the metal from rusting and corroding, the zinc-rich primer has excellent cathodic protection effect, even if the coating is slightly damaged, the zinc powder can be preferentially corroded, thereby protecting the base alloy steel, and at the same time, it has good adhesion with the base layer and the outer layer material, and can enhance the stability of the entire outer layer structure;

[0030] The wear-resistant ceramic outer layer 13 forms a wear-resistant protection on the outermost layer of the sleeve, resists the friction and wear of particles such as sand and ore in the mine, and reduces the damage to the surface of the sleeve; the alumina ceramic has extremely high hardness and wear resistance, can significantly improve the wear resistance of the sleeve, reduce the size change and connection loosening risk caused by wear, and ensure the long-term stable use of the joint.

[0031] In this embodiment, the material of the flexible rubber buffer layer 14 is nitrile rubber, the material of the electromagnetic shielding layer 15 is copper-plated iron wire mesh, and the material of the fire-retardant outer layer 16 is polyvinyl chloride; the electromagnetic shielding layer 15 forms an electromagnetic shielding space inside the sleeve, blocking the influence of external electromagnetic interference on the electrical system of the mine equipment, and also preventing the electromagnetic signals generated inside the sleeve from interfering with the outside; advantage: copper-plated iron wire mesh has good electrical conductivity and electromagnetic shielding performance, can effectively reduce the influence of electromagnetic interference on the normal operation of the mine equipment, improve the reliability and stability of the equipment, has low cost, is easy to install, and is suitable for large-scale application;

[0032] The fire-retardant outer layer 16 forms a fire barrier on the outermost layer of the sleeve, preventing the spread of fire and protecting the sleeve and connecting parts from damage during a fire, and also avoiding safety accidents caused by fire; the flame-retardant PVC has good flame-retardant performance and chemical stability, can prevent the spread of fire for a certain period of time, provides effective protection for the fire protection of mine equipment, has good processing performance, can be customized according to the shape of the sleeve, and is convenient to install and use.

[0033] In this embodiment, the shapes of the first and second sealing rubber rings 7 and 8 are both conical, and the materials of the first and second sealing rubber rings 7 and 8 are rubber; the rubber material allows the first and second sealing rubber rings 7 and 8 to be connected more tightly, can be deformed after being extruded, and can provide better sealing effect for the butt joint pipe 3 and the threaded sealing connection pipe 4.

[0034] In this embodiment, the diameter of the sealing connection pipe 2 is the same as the inner diameter of the butt joint pipe 3 and the second sealing rubber ring 8; the sealing connection pipe 2 and the butt joint pipe 3 can be connected to form a closed space, so that the connection between the joint sleeve 1 and the butt joint pipe 3 has high strength and is not easy to be damaged.

[0035] In this embodiment, the inner diameter of the threaded sealing connection pipe 4 is the same as the diameter of the joint sleeve 1, so that the threaded sealing connection pipe 4 and the joint sleeve 1 can be quickly connected through the external thread 5 and the internal thread 6, and the external thread 5 and the internal thread 6 can be quickly engaged after being connected.

[0036] Specific operation is, the butt joint pipe 3 is inserted to the position of sealing connection pipe 2, after insertion, the butt joint pipe 3 and threaded sealing connection pipe 4 can be rotated, the internal thread 6 above threaded sealing connection pipe 4 is engaged with the external thread 5 above joint sleeve 1, the quick connection of joint sleeve 1 and butt joint pipe 3 can be realized, the second sealing rubber ring 8 above butt joint pipe 3 can be attached with the first sealing rubber ring 7 above sealing connection pipe 2 after being inserted into the inner side of sealing connection pipe 2, since the first sealing rubber ring 7 and the second sealing rubber ring 8 are both conical design, the connection area of the first sealing rubber ring 7 and the second sealing rubber ring 8 can be larger, the sealing effect of joint sleeve 1 and butt joint pipe 3 after connection can be better, and leakage does not occur;

[0037] The high-strength alloy steel base layer 11 serves as the basic support structure of the sleeve, bears the main stress at the joint, ensures the overall strength and rigidity of the sleeve, and prevents deformation or fracture under high pressure, heavy load and frequent vibration and other working conditions; the alloy steel has high strength and toughness, can effectively resist mechanical impact and fatigue load under complex mine environment, prolongs the service life of the sleeve, and good processing performance also facilitates manufacturing high-precision sleeve size, ensuring close fit with the connecting parts.

[0038] The anticorrosion coating intermediate layer 12 forms a dense protective film on the surface of the high-strength alloy steel base layer, blocks the contact of moisture, oxygen and corrosive medium with the base metal, prevents metal rusting and corrosion, and the zinc-rich primer has excellent cathodic protection effect, even if the coating has slight damage, zinc powder can be preferentially corroded, thereby protecting the base alloy steel. At the same time, it has good adhesion with the base layer and the outer layer material, and can enhance the stability of the entire outer layer structure.

[0039] It should be noted that although the embodiments of the present application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A mining coupling sleeve, characterized in that, Include: The inner side of the joint sleeve (1) is fixedly installed with a sealing connection pipe (2), the lower side of the joint sleeve (1) is provided with a butt pipe (3), the outer side of the butt pipe (3) is fixedly installed with a threaded sealing connection pipe (4), the outer side of the joint sleeve (1) is provided with an external thread (5), the inner wall of the threaded sealing connection pipe (4) is provided with an internal thread (6), the top of the butt pipe (3) is fixedly installed with a first sealing rubber ring (7), the top inner wall of the sealing connection pipe (2) is fixedly installed with a second sealing rubber ring (8), the joint sleeve (1) comprises a reinforced outer layer (9) and a sealing inner layer (10).

2. A mining coupling sleeve according to claim 1, characterised in that, The reinforced outer layer (9) comprises a high-strength alloy steel base layer (11), a corrosion-resistant coating intermediate layer (12) and a wear-resistant ceramic outer layer (13), the corrosion-resistant coating intermediate layer (12) is fixedly connected to one side of the high-strength alloy steel base layer (11), and the wear-resistant ceramic outer layer (13) is fixedly connected to one side of the corrosion-resistant coating intermediate layer (12).

3. A mining coupling sleeve according to claim 2, characterised in that, The sealing inner layer (10) comprises a flexible rubber buffer layer (14), an electromagnetic shielding layer (15) and a fire-retardant outer layer (16), the wear-resistant ceramic outer layer (13) is fixedly connected with the flexible rubber buffer layer (14), the electromagnetic shielding layer (15) is fixedly connected to one side of the flexible rubber buffer layer (14), and the fire-retardant outer layer (16) is fixedly connected to one side of the electromagnetic shielding layer (15).

4. A mining coupling sleeve as claimed in claim 2, characterised in that, The material of the high-strength alloy steel base layer (11) is high-strength alloy steel, the material of the corrosion-resistant coating intermediate layer (12) is zinc-rich primer, and the material of the wear-resistant ceramic outer layer (13) is alumina ceramic.

5. A mining coupling sleeve as claimed in claim 3, characterised in that, The material of the flexible rubber buffer layer (14) is nitrile rubber, the material of the electromagnetic shielding layer (15) is copper-plated iron wire mesh, and the material of the fire-retardant outer layer (16) is polyvinyl chloride.

6. A mining coupling sleeve as defined in claim 1, wherein, The shape of the first sealing rubber ring (7) and the second sealing rubber ring (8) is conical, and the material of the first sealing rubber ring (7) and the second sealing rubber ring (8) is rubber material.

7. A mining coupling sleeve as defined in claim 1, wherein, The diameter size of the sealing connection pipe (2) is the same as the inner diameter size of the butt pipe (3) and the second sealing rubber ring (8).

8. A mining coupling sleeve as defined in claim 1, wherein, The inner diameter size of the threaded sealing connection pipe (4) is the same as the diameter size of the joint sleeve (1).

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