Corrosion-resistant and life-extended fiber packing

Abstract

The utility model discloses a corrosion-resistant and life-extending fiber packing, comprising a main body, wherein the main body comprises a flexible graphite packing layer, a carbon fiber packing layer, and a metal wire reinforced graphite packing layer, wherein the flexible graphite packing layer is in the middle and the carbon fiber packing layer and the metal wire reinforced graphite packing layer are respectively located at the top surface and the bottom surface of the flexible graphite packing layer, and the side surface of the flexible graphite packing layer is provided with gaps at intervals along the length direction and adsorption blocks for adsorbing liquid are provided at the gaps. The structure of the packing is improved in this scheme, and the three-layer main body configuration composed of the flexible graphite packing layer, the carbon fiber packing layer, and the metal wire reinforced graphite packing layer helps to improve the high pressure and high temperature resistance. A gap is formed at the side surface of the middle flexible graphite packing layer and an adsorption block is built in. The adsorption block adsorbs lubricating oil and the like and extrude it after being pressed, which helps to improve the lubrication performance, avoid wear of the shaft body, and increase the service life.

Description

Technical Field

[0001] The utility model relates to the technical field of sealing, in particular to a corrosion-resistant and life-extending fiber packing. Background Art

[0002] Packing is a common sealing filler, usually plugged in the channel to prevent leakage. It is widely used in the oil field. Common packing is a single-layer configuration with limited performance and cannot meet the needs. In order to improve pressure resistance and other properties, some companies prepare multi-layer packing. Packing with a reinforced layer can be used in high-pressure environments. The disadvantage is that when used in the oil field, the packing and the light lever are dry rubbed, which causes greater wear and tear, and the packing life is short, which needs to be improved. Utility Model Content

[0003] In order to solve at least one of the above technical defects, the utility model provides the following technical solutions:

[0004] The present application document discloses a corrosion-resistant and life-extending fiber packing, comprising a main body, wherein the main body comprises a flexible graphite packing layer, a carbon fiber packing layer, and a metal wire reinforced graphite packing layer, wherein the flexible graphite packing layer is in the middle and the carbon fiber packing layer and the metal wire reinforced graphite packing layer are respectively located at the top surface and the bottom surface of the flexible graphite packing layer, and notches are arranged at intervals along the length direction at the side surface of the flexible graphite packing layer and adsorption blocks for adsorbing liquids are arranged at the notches.

[0005] The structure of the packing is improved in this solution. The three-layer main body configuration consisting of a flexible graphite packing layer, a carbon fiber packing layer, and a metal wire reinforced graphite packing layer helps to improve the high pressure and high temperature resistance. The side of the middle flexible graphite packing layer is formed with a notch and a built-in adsorption block. The adsorption block absorbs lubricating oil and squeezes it out after being compressed, which helps to improve the lubrication performance, avoid wear on the shaft, and increase the service life.

[0006] Flexible graphite packing layers such as high carbon graphite are processed and formed after processing, and have multiple properties such as softness, resilience, corrosion resistance, high pressure and high temperature resistance, and thermal conductivity.

[0007] For the carbon fiber packing layer, such as the common acrylic fiber, it is oxidized and woven into a shape, which has the characteristics of wear resistance and high stability.

[0008] For the metal wire reinforced graphite packing layer, if the graphite wire is reinforced with metal wire such as nickel wire and stainless steel wire, it has the characteristics of resistance to high pressure and high temperature.

[0009] Furthermore, it also includes a corrosion-resistant layer, which is coated on the main body and a window is set at the position of the corrosion-resistant layer corresponding to the notch. The corrosion-resistant layer is added to improve the corrosion resistance, which helps to expand the application field and prolong the service life.

[0010] Furthermore, the corrosion-resistant layer is a platinum disulfide coating.

[0011] Furthermore, the width of the flexible graphite packing layer is consistent with that of the carbon fiber packing layer and the metal wire reinforced graphite packing layer.

[0012] Furthermore, the thicknesses of the flexible graphite packing layer, the carbon fiber packing layer, and the metal wire reinforced graphite packing layer are consistent.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] 1. The utility model improves the structure of the packing. The main body of the three-layer configuration has the characteristics of high pressure resistance, etc. The adsorption block is built into the gap of the middle layer. The adsorption block can better store lubricating oil, etc., and provide lubrication performance after extrusion, which helps to reduce the wear on the shaft and help extend the service life.

[0015] 2. The utility model improves the structure of the packing and provides a platinum disulfide coating on the outside, which helps to improve the corrosion resistance, expand the application field and extend the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 is a schematic diagram of the cross-sectional structure of the fiber packing in Example 1;

[0018] Figure 2 This is a schematic diagram of the overall structure of the fiber packing;

[0019] Wherein, the accompanying drawings are marked as follows:

[0020] 1. Main body; 2. Corrosion-resistant layer; 10. Metal wire reinforced graphite disk layer; 11. Carbon fiber packing layer; 12. Flexible graphite packing layer; 13. Notch; 14. Adsorption block; 21. Window. DETAILED DESCRIPTION

[0021] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments.

[0022] Example 1

[0023] like Figure 1 , Figure 2As shown, in this example, the corrosion-resistant and life-extending fiber packing includes a main body 1, which has a three-layer configuration. Specifically, the main body 1 includes a flexible graphite packing layer 12, a carbon fiber packing layer 11, and a metal wire reinforced graphite packing layer 10, wherein the flexible graphite packing layer 12 is in the middle, the carbon fiber packing layer 11 is at the top surface of the flexible graphite packing layer 12, and the metal wire reinforced graphite packing layer 10 is at the bottom surface of the flexible graphite packing layer 12.

[0024] The width of the flexible graphite packing layer 12 is consistent with that of the carbon fiber packing layer 11 and the metal wire reinforced graphite packing layer 10, such as 25 mm. The width of the flexible graphite packing layer 12 is consistent with that of the carbon fiber packing layer 11 and the metal wire reinforced graphite packing layer 10, such as 1 mm.

[0025] For flexible graphite packing layers, for example, after the scaly high carbon graphite is subjected to predetermined chemical and physical treatment, a flexible graphite layer is formed, which retains the characteristics of graphite while having the characteristics of flexibility and corrosion resistance. For carbon fiber packing layers, for example, oxidized acrylic fibers are woven into a hierarchical structure, which has excellent thermal conductivity and wear resistance. For metal-reinforced graphite disc layers, the graphite wire is reinforced with metal wires such as nickel wire and copper wire, and the performance is stable.

[0026] In this example, grooves are formed at intervals along the length direction on the side of the flexible graphite packing layer 12, namely, notches 13. An adsorption block 14 for adsorbing liquid is built in the notch 13. The adsorption block can be formed of a common material that can absorb oil. The periphery of the adsorption block 14 can be fixed to the cavity wall of the notch by sewing with fine threads. The lubricating oil is adsorbed by the adsorption block. When the packing is squeezed, the oil flows out of the notch to improve the lubrication performance. The adsorption block adsorbs the oil again during the recovery process, and the storage performance is good.

[0027] In this example, a corrosion-resistant layer 2 is added, such as the corrosion-resistant layer 2 is coated on the main body, and a through hole is reserved at the position corresponding to the notch of the corrosion-resistant layer 2, that is, a window 21. The window is reserved to facilitate the outflow of the extruded oil. The corrosion-resistant layer 2 is such as a platinum disulfide coating. The corrosion-resistant layer is added to improve the corrosion resistance. After the packing main body is formed, the platinum disulfide coating is directly coated and dried.

[0028] In this solution, the three-layer main body configuration consisting of a flexible graphite packing layer, a carbon fiber packing layer, and a metal wire reinforced graphite packing layer improves the performance. The adsorption blocks built into the notch absorb the lubricating oil and squeeze it out after being compressed, which helps to improve the lubrication performance. The platinum disulfide coating improves the corrosion resistance.

[0029] The above are only preferred implementations of the utility model. The protection scope of the utility model is not limited to the above embodiments. All technical solutions under the idea of ​​the utility model belong to the protection scope of the utility model. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the utility model should also be regarded as the protection scope of the utility model.

Claims

1. A corrosion-resistant and life-extending fiber packing, comprising a main body, wherein the main body comprises a flexible graphite packing layer, a carbon fiber packing layer, and a metal wire reinforced graphite packing layer, wherein the flexible graphite packing layer is in the middle and the carbon fiber packing layer and the metal wire reinforced graphite packing layer are respectively located at the top surface and the bottom surface of the flexible graphite packing layer, characterized in that: Notches are arranged at intervals along the length direction on the side surface of the flexible graphite packing layer, and adsorption blocks for adsorbing liquid are arranged at the notches.

2. The corrosion-resistant and life-extending fiber packing according to claim 1, characterized in that: It also includes a corrosion-resistant layer, which is coated on the main body and has windows arranged at positions of the corrosion-resistant layer corresponding to the notches.

3. The corrosion-resistant and life-extending fiber packing according to claim 2, characterized in that: The corrosion-resistant layer is a platinum disulfide coating.

4. The corrosion-resistant and life-extending fiber packing according to claim 1, characterized in that: The width of the flexible graphite packing layer is consistent with that of the carbon fiber packing layer and the metal wire reinforced graphite packing layer.

5. The corrosion-resistant and life-extending fiber packing according to claim 1, characterized in that: The thicknesses of the flexible graphite packing layer, the carbon fiber packing layer and the metal wire reinforced graphite packing layer are consistent.

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