Low-abrasion lubrication type packing

Abstract

The utility model discloses a low-abrasion lubrication type packing which comprises a packing body, a hollow fiber pipe is arranged in the packing body, micropores are formed in the pipe wall of the hollow fiber pipe, the hollow fiber pipe is filled with lubricant, and the lubricant is in a solid state at normal temperature and is in a liquid state after being heated to a preset temperature. According to the scheme, the structure of the packing is improved, the hollow fiber pipe is arranged in the packing body, the pipe cavity of the fiber pipe is filled with the lubricant such as paraffin, the paraffin is in a solid state at the normal temperature and is liquefied after being heated to the melting point, the fiber pipe in the packing is extruded due to heating, paraffin liquefaction, packing extrusion and the like in the use process of the packing, and the liquefied paraffin is separated out from the micropores; long-time lubrication can be achieved, and abrasion is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of sealing devices, in particular to a low-wear lubricating packing. Background Art

[0002] Packing is widely used in oil extraction. The bare rod reciprocates up and down at the wellhead, and the seal between the two is mainly achieved by a sealer with packing inside. The defect is that there is dry friction between the bare rod and the packing, which results in large resistance and wear, and a short service life of the packing. In order to improve the lubrication performance of the packing, some companies adopt the material formula of the packing and add lubricants. However, the research and development is too difficult and 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 low-wear lubricating packing, comprising a packing body, wherein a hollow fiber tube is arranged in the packing body, micropores are arranged on the tube wall of the hollow fiber tube and a lubricant is filled in the hollow fiber tube, wherein the lubricant is solid at room temperature and becomes liquid after being heated to a predetermined temperature.

[0005] In this scheme, the structure of the packing is improved. A hollow fiber tube is placed in the main body of the packing. The lubricant, such as paraffin, is filled through the lumen of the fiber tube. Paraffin is solid at room temperature and liquefies after being heated to the melting point. When the packing is used, the temperature rises and the paraffin liquefies. The packing is squeezed, which causes the internal fiber tube to be squeezed. The liquefied paraffin precipitates from the micropores, which can provide long-term lubrication and reduce wear.

[0006] Furthermore, the hollow fiber tube extends along the length direction of the packing body, thereby expanding the lubrication area and better lubricating the packing.

[0007] Furthermore, a plurality of hollow fiber tubes are arranged side by side in the packing body to lubricate the packing for a longer period of time.

[0008] Furthermore, the thickness of the packing body is 1.5-2 mm, and the outer diameter of the hollow fiber tube is 0.6-1 mm. The limited size does not substantially affect the performance of the packing.

[0009] Furthermore, the packing body is coated with a polyfluoro film and through holes are arranged at intervals on the polyfluoro film. Adding the polyfluoro film helps to improve the strength and also helps to increase the service life. The through holes are limited to facilitate the precipitation of lubricant.

[0010] Compared with the prior art, the utility model has the following beneficial effects:

[0011] 1. The utility model improves the structure of the packing, has a hollow fiber tube built in, and the lubricant is filled in the tube cavity. When the packing is heated up during use, the lubricant liquefies and precipitates, thereby improving the lubrication performance and reducing the wear of the packing. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] 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.

[0013] Figure 1 is a schematic diagram of the cross-sectional structure of the packing in Example 1;

[0014] Figure 2 is a schematic diagram of the cross-sectional structure of the packing in Example 1;

[0015] Wherein, the accompanying drawings are marked as follows:

[0016] 1. Packing body; 2. PTFE membrane; 3. Hollow fiber tube; 4. Lubricant; 21. Through hole. DETAILED DESCRIPTION

[0017] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments.

[0018] Example 1

[0019] like Figure 1 , Figure 2 As shown, the low-wear lubricating packing in this example includes a packing body 1, wherein the packing body is braided and formed by common high-carbon graphite, and a hollow fiber tube 3 is arranged in the packing body 1, and the hollow fiber tube is directly braided therein during the braiding process.

[0020] The hollow fiber tube 3 is formed of a polymer material, such as common polyethylene, polypropylene, etc., and a proper amount of salt is added to the polymer material during preparation. After mixing and granulation, the hollow fiber tube is extruded and formed. The salt is then removed by soaking and washing in water, and a plurality of micropores are formed on the wall of the hollow fiber tube.

[0021] In this example, the hollow fiber tube 3 is filled with lubricant 4, which is solid at room temperature and liquid after being heated to a predetermined temperature. Lubricant 4, such as paraffin, is solid at room temperature and liquid when heated to the melting point. The liquid paraffin precipitates from the micropores on the wall of the hollow fiber tube, thereby improving the lubrication performance of the packing.

[0022] For filling the lubricant in the hollow fiber tube, paraffin wax is mixed with a solvent and then poured into or penetrated into the cavity of the hollow fiber tube. The solvent is removed and the paraffin wax remains in the cavity.

[0023] For hollow fiber tubes, Figure 1 As shown, two strips can be arranged side by side and spaced apart along the width direction of the packing body 1, such as Figure 2 As shown, each hollow fiber tube 3 extends along the length direction of the packing body 1. As for the size, if the thickness of the packing body is 1.5-2 mm, the width of the packing body is 30 mm, and the outer diameter of the hollow fiber tube is 0.6-1 mm.

[0024] In addition, the packing body 1 can be coated with a polyfluoro film 2, which helps to improve strength and extend service life, and the polyfluoro film is provided with through holes at intervals, such as hollow fiber tubes. The through holes 21 are formed at intervals at corresponding positions above and below, such as Figure 2 As shown, the through holes 21 are distributed at intervals along the extension direction of the hollow fiber tube 3, and the through holes facilitate the precipitation of the lubricant.

[0025] The packing heats up during use, and the paraffin in the packing liquefies and precipitates, which can better lubricate the packing, reduce wear, and help extend its service life.

[0026] 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 low-wear lubricating packing, comprising a packing body, characterized in that: A hollow fiber tube is arranged in the packing body, micropores are arranged on the tube wall of the hollow fiber tube and lubricant is filled in the hollow fiber tube. The lubricant is solid at room temperature and liquid after being heated to a predetermined temperature.

2. The low-wear lubricating packing according to claim 1, characterized in that: The hollow fiber tube extends along the length direction of the packing body.

3. The low-wear lubricating packing according to claim 1, characterized in that: A plurality of hollow fiber tubes are arranged side by side in the packing body.

4. The low-wear lubricating packing according to claim 1, characterized in that: The thickness of the packing body is 1.5-2 mm, and the outer diameter of the hollow fiber tube is 0.6-1 mm.

5. The low-wear lubricating packing according to claim 1, characterized in that: The packing body is covered with a polyfluoro film and through holes are arranged at intervals on the polyfluoro film.

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