Packing filler

Abstract

The utility model relates to the technical field of sealing fillers, and discloses a packing filler, which comprises a tubular knitted sleeve, the wear-resistant fibers are densely filled in the knitted sleeve along the length direction of the knitted sleeve; the oil guide fiber is arranged in the knitted sleeve along the length direction of the knitted sleeve and is positioned in the middle of the wear-resistant fiber; the permeable fibers are all arranged in the knitted sleeve, the multiple permeable fibers are evenly arranged in the circumferential direction of the oil guide fiber with the oil guide fiber as the center, and the multiple permeable fibers penetrate out of the knitted sleeve to be connected with the knitted sleeve and the oil guide fiber; the permeable fibers are respectively sewed with the knitted sleeve and the oil guide fibers; the packing filler has the advantages of good oil storage capacity, stronger self-lubricating effect, long service life, capability of avoiding sudden oil leakage, rapidness and convenience in filling of the packing filler, low maintenance difficulty of workers and low labor intensity.

Description

Technical Field

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

[0002] The packing is mainly used for dynamic sealing of the moving parts of process machines and equipment in the machinery industry, such as the rod or piston rod sealing of blowout preventers, reciprocating pumps and reciprocating compressors, and the shaft sealing of centrifugal pumps, compressors and vacuum pumps.

[0003] For blowout preventers, at present, most of the polished rod seals for oil extraction use rubber vulcanized with two materials of fabric or fiber. The disadvantage of this packing is low bonding strength. Since the service life of the packing itself depends on the physical properties and bonding strength of the fabric or fiber, and the strength and wear resistance between rubber and fabric fiber are very different, the two materials cannot be evenly worn by the polished rod for oil extraction after being compounded, resulting in rapid wear of some rubber materials in the stuffing box and shortening the service life of the packing. At the same time, it is easy to cause sudden oil leakage, and the existing packing has an unremarkable self-lubricating effect. After a very short use time, the self-lubricating ability drops rapidly, resulting in a short sealing life of the packing.

[0004] In view of this, the utility model provides a packing. Content of the Utility Model

[0005] The utility model provides a packing which has good oil storage capacity, strong self-lubricating effect and long service life to solve the deficiencies in the above-mentioned prior art.

[0006] The technical solution of the utility model is: a packing, comprising:

[0007] A knitted sleeve, which is tubular;

[0008] A plurality of wear-resistant fibers, which are densely filled inside the knitted sleeve along the length direction of the knitted sleeve;

[0009] An oil guiding fiber, which is arranged inside the knitted sleeve along the length direction of the knitted sleeve, and the oil guiding fiber is located at the middle position of the plurality of wear-resistant fibers;

[0010] A plurality of permeating fibers, which are all arranged inside the knitted sleeve. The plurality of permeating fibers are uniformly arranged in the circumferential direction of the oil guiding fiber with the oil guiding fiber as the center, and the plurality of permeating fibers penetrate out of the knitted sleeve and are respectively connected with the knitted sleeve and the oil guiding fiber.

[0011] In at least one embodiment of the present disclosure, the permeating fibers facing the same direction on the knitted sleeve are an integral permeating fiber, and the permeating fiber is respectively sewn to the knitted sleeve and the oil guiding fiber.

[0012] In at least one embodiment of the present disclosure, the diameter of the oil-conducting fiber is greater than that of the permeating fiber, and multiple permeating fibers are attached to the wear-resistant fiber.

[0013] In at least one embodiment of the present disclosure, the tensile strength of the permeating fiber is greater than that of the oil-conducting fiber.

[0014] In at least one embodiment of the present disclosure, the number of the permeating fibers is 4 to 8.

[0015] In at least one embodiment of the present disclosure, the cross-section of the knitted sleeve is rectangular.

[0016] Advantages of the utility model:

[0017] Compared with the prior art, the present utility model provides a packing, and the advantages are as follows:

[0018] 1. By providing a knitted sleeve, wear-resistant fiber, oil-conducting fiber and permeating fiber, in the process of using the packing, the permeating fiber can directly contact the oil and absorb the oil to the oil-conducting fiber, and the oil-conducting fiber has an oil storage effect, which can lubricate the oil rod in time during the operation of the oil rod, so that the running resistance of the oil rod is low, the wear of the packing is reduced, and the packing can be evenly worn, so that the service life of the packing is quite long, and the maintenance frequency of the oil well is reduced;

[0019] 2. When the present utility model is used in cooperation with a blowout preventer box, in case of an unexpected situation of oil rod breakage, due to the soft texture of the packing, the packing can contract into the inner cavity of the packing box under the pressure of the oil well, thereby realizing the sealing of the oil well and avoiding the accident of sudden oil leakage in case of oil rod breakage;

[0020] 4. For the packing provided by the present utility model, when the staff maintains the oil well, there is no need to take out the original packing, and the packing can be directly filled. Moreover, in the filling process, it is not necessary to cut each circle of the packing as in the prior art. It only needs to be cut after the winding and filling are completed, and then it is pressed by a pressing column. If there is no leakage after testing, it is okay. Therefore, the maintenance difficulty for the staff is small and the labor intensity is low;

[0021] 5. When the packing provided by the present utility model is used, there is no replaced old packing, and there will be no environmental pollution caused by packing waste.

[0022] 6. When the packing provided by the present utility model is used, the sealing effect is good, and there is no need to cooperate with an additional sealing device, thereby simplifying the overall structure of the equipment and reducing the maintenance difficulty of the equipment. Description of the drawings

[0023] Figure 1Schematic side view structure diagram of the present utility model;

[0024] Figure 2 Schematic cross-sectional structure diagram of the present utility model;

[0025] Figure 3 Schematic structure diagram of the present utility model in use state.

[0026] Explanation of reference numerals:

[0027] 1, knitting sleeve; 2, wear-resistant fiber; 3, oil-conducting fiber; 4, permeable fiber; 5, lubricating oil tank; 6, packing box body; 7, packing pressing column; 8, oil rod. Detailed implementation manners

[0028] The drawings in this disclosure are not strictly drawn according to the actual proportions, and the specific dimensions and quantities of each structure can be determined according to actual needs. The drawings described in this disclosure are only schematic structure diagrams.

[0029] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions of the embodiments of the present utility model will be clearly and completely described below in conjunction with the drawings of the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present utility model without creative efforts shall fall within the scope of protection of the present utility model.

[0030] Unless otherwise defined, the technical terms or scientific terms used herein shall have the ordinary meanings understood by those of ordinary skill in the art to which the present utility model belongs. The "first", "second" and similar terms used in the description of the specification and claims of the present utility model patent do not indicate any order, quantity or importance, but are only used to distinguish different components. The terms such as "including" or "comprising" mean that the elements or objects appearing before this word cover the elements or objects listed after this word and their equivalents, without excluding other elements or objects. The terms such as "inside", "outside", "above", "below", "far", "near", "front", "rear", etc. are only used to represent relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0031] For the blowout preventer box, most of the current polished rod sealing packing is made of rubber vulcanized with fabric or fiber. The disadvantage of this packing is its low bonding strength. Since the service life of the packing itself depends on the physical properties and bonding strength of the fabric or fiber, and there is a large difference in strength and wear resistance between rubber and fabric fiber, the two materials cannot be evenly worn by the polished rod after being compounded, resulting in rapid wear of some rubber materials in the packing cavity and shortening the service life of the packing. At the same time, it is easy to cause sudden oil leakage, and the existing packing has an unremarkable self-lubricating effect. After a short use time, the self-lubricating ability drops rapidly, leading to a short sealing life of the packing.

[0032] In view of this, we propose a packing, which has good oil storage capacity, strong self-lubricating effect, long service life, and can avoid sudden oil leakage. The packing is quick and convenient to fill, with low maintenance difficulty and labor intensity for workers.

[0033] Combined with Figures 1 to 3 As shown, a packing includes:

[0034] A knitted sleeve 1, which is tubular. The surface of the knitted sleeve 1 is a mesh structure, enabling oil to smoothly penetrate into the knitted sleeve 1; the knitted sleeve 1 can be a tubular structure sewn from knitted fabric;

[0035] Multiple wear-resistant fibers 2 are densely filled inside the knitted sleeve 1 along the length direction of the knitted sleeve 1; the materials of the wear-resistant fibers 2 include but are not limited to: wear-resistant materials such as carbon fiber, glass fiber, and aramid.

[0036] Oil guiding fibers 3 are arranged inside the knitted sleeve 1 along the length direction of the knitted sleeve 1, and the oil guiding fibers 3 are located at the middle position of the multiple wear-resistant fibers 2;

[0037] Multiple penetration fibers 4 are all arranged inside the knitted sleeve 1. The multiple penetration fibers 4 are evenly arranged in the circumferential direction of the oil guiding fibers 3 with the oil guiding fibers 3 as the center. The multiple penetration fibers 4 penetrate through the knitted sleeve 1 and are respectively connected to the knitted sleeve 1 and the oil guiding fibers 3. The materials of the oil guiding fibers 3 and the penetration fibers 4 include but are not limited to: flax fiber, cotton fiber, kapok fiber, etc.; when the packing is in use, the penetration fibers 4 are in close contact with the polished rod, so that the crude oil or lubricating oil stored in the oil guiding fibers 3 can lubricate the oil rod 8 in time to avoid rapid wear of the packing.

[0038] As an alternative embodiment, the penetration fibers 4 facing the same direction on the knitted sleeve 1 are an integral penetration fiber 4, and the penetration fibers 4 are respectively sewn to the knitted sleeve 1 and the oil guiding fibers 3; the sewing method can not only fix the oil guiding fibers 3 but also connect the oil guiding fibers 3 to the knitted sleeve 1, facilitating the flow of oil on the oil guiding fibers 3.

[0039] As an alternative embodiment, the diameter of the oil-conducting fiber 3 is greater than the diameter of the permeating fiber 4, and multiple permeating fibers 4 are attached to the wear-resistant fiber 2.

[0040] As an alternative embodiment, the tensile strength of the permeating fiber 4 is greater than the tensile strength of the oil-conducting fiber 3. During the use of the packing, the permeating fiber 4 is continuously worn. If the strength of the permeating fiber 4 is too low, it is easily broken directly under the action of the friction force of the oil rod, thus affecting the subsequent lubrication effect.

[0041] As an alternative embodiment, the number of the permeating fibers 4 is 4 to 8, and the specific number of the permeating fibers 4 can be adaptively selected according to the application environment of the packing.

[0042] As an alternative embodiment, the cross-section of the knitted sleeve 1 is rectangular, and this cross-section is the section perpendicular to the length direction of the knitted sleeve 1. The size of the knitted sleeve 1 can be: 2mm x 3mm, 8mm x 9mm, 12mm x 14mm, 13mm x 15mm, 20mm x 22mm, etc. And because the packing proposed by the present utility model has a large deformation amount, when the ratio of the packing box body to the packing specification does not exceed 3:1, this packing can be normally installed and used, reducing the specifications of the stocked packing.

[0043] Furthermore, this packing is soft, convenient to install and fill. If possible, replace the packing pressing column with the packing pressing column 5 as shown in the attached instructions of the specification (the contact surface between the packing pressing column and the packing is arc-shaped), and the use effect is better. Since the packing has a large deformation amount, it can be smoothly filled into a packing box with a slightly larger or smaller specification. It can be sealed by pressing with a pressing column in the packing box. For example, it can be filled into an 8mm packing box with a size of 10mm - 11mm, or it can be filled into a packing box of 12mm or larger because it is flexible. Figure 3 Furthermore, when an unexpected situation of oil rod breakage occurs during the daily use of the packing on the oil rod, due to the soft texture of this packing, the packing can contract into the inner cavity of the packing box under the action of the oil well pressure, thus realizing the sealing of the oil well and avoiding the sudden oil leakage accident in the case of oil rod breakage.

[0044] The working principle and usage method of this embodiment:

[0045] The present utility model provides a packing, which is used in cooperation with an anti-blowout box with a patent number of 202310355820.1 previously declared by the inventor, and the use effect is the best. When initially filling this packing, the packing is filled as shown in the attached instructions of the specification

[0046] of the specification. Figure 1The end of the packing is cut at a diagonal bevel of 15 - 25 degrees, and then wound into the packing box body 6 in a clockwise direction. After the packing box body 6 is filled with the packing, the packing is cut at an inclined angle of 15 degrees to 25 degrees again, and then pressed tightly with the packing pressing column 7 as shown in the attached instructions of the specification Figure 3 When it is tight and there is no leakage, the filling is completed (the contact surface between the packing pressing column 7 and the packing is arc-shaped, which can push the packing towards the center position). During the daily operation of the packing, the lubricating oil in the lubricating oil tank 5 can contact the upper cut surface of the packing, and the lubricating oil can be fully infiltrated into the packing through the oil guiding fiber 3 (similar to the wick effect). Then, when the oil well enters the high water cut development stage or the oil production is less, multiple permeating fibers 4 arranged on the packing can lead out the lubricating oil in the oil guiding fiber 3 and make the lubricating oil directly contact the sucker rod to lubricate the sucker rod 8 in time, reducing the running resistance of the sucker rod 8, thereby reducing the wear of the packing. And because the knitting sleeve 1 of the packing is densely filled with wear-resistant fibers 2, the packing can be evenly worn during use, and the service life of the packing is quite long; under normal conditions, the crude oil carried by the sucker rod 8 can also be absorbed by the packing and used for lubricating the sucker rod 8; during the daily maintenance process, when the packing needs to be replenished, there is no need to take out the original packing, just directly fill the packing and press it tightly with the packing pressing column 7. When it is tight and there is no leakage, it is okay. Thus, the maintenance difficulty for the staff is small, the labor intensity is low, and inexperienced employees can be competent after simple guidance;

[0047] When a packing provided by the present utility model is applied to a common blowout preventer box on the market (a blowout preventer box without a lubricating oil tank), the filling method is the same as above. During the daily operation of the packing, the crude oil carried by the sucker rod 8 can be brought into the oil guiding fiber 3 by the permeating fiber 4 and stored. When the oil well enters the high water cut development stage or the oil production is less, the permeating fiber 4 can carry the stored crude oil to lubricate the sucker rod 8, thereby reducing the running resistance of the oil cylinder and the wear of the packing;

[0048] When a packing provided by the present utility model is applied to the shaft seal of a centrifugal pump, a compressor or a vacuum pump, it is wound in the rotation direction of the shaft during the packing filling.

[0049] The above embodiments are only specific implementation manners of the utility model patent, which are used to illustrate the technical solutions of the utility model patent rather than limit it. The protection scope of the utility model patent is not limited thereto. Although the utility model patent has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that any person skilled in the art within the technical scope disclosed by the utility model can still modify the technical solutions recorded in the foregoing embodiments, or can easily think of changes, or make equivalent replacements for some of the technical features; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions implemented by the utility model patent, and should all be covered within the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be subject to the protection scope of the claims.

Claims

1. A packing, characterized in that: include: The knitted sleeve (1) is tubular; A plurality of wear-resistant fibers (2) are densely filled inside the knitted sleeve (1) along the length direction of the knitted sleeve (1); Oil-conducting fibers (3) are arranged in the knitting sleeve (1) along the length direction of the knitting sleeve (1), and the oil-conducting fibers (3) are located in the middle of the plurality of wear-resistant fibers (2); A plurality of permeable fibers (4) are arranged in the knitted sleeve (1); the plurality of permeable fibers (4) are evenly arranged around the oil-conducting fiber (3) with the oil-conducting fiber (3) as the center; the plurality of permeable fibers (4) pass through the knitted sleeve (1); and the plurality of permeable fibers (4) are respectively connected to the knitted sleeve (1) and the oil-conducting fiber (3).

2. A packing as claimed in claim 1, characterized in that: The permeable fibers (4) on the knitted sleeve (1) facing in the same direction are a whole permeable fiber (4), and the permeable fibers (4) are sewn together with the knitted sleeve (1) and the oil-conducting fibers (3) respectively.

3. A packing as claimed in claim 1, characterized in that: The diameter of the oil-conducting fiber (3) is greater than the diameter of the permeable fiber (4), and a plurality of the permeable fibers (4) are in contact with the wear-resistant fiber (2).

4. A packing as claimed in claim 1, characterized in that: The tensile strength of the permeable fiber (4) is greater than the tensile strength of the oil-conducting fiber (3).

5. A packing as claimed in claim 2, characterized in that: The number of the permeating fibers (4) is 4 to 8.

6. A packing as claimed in claim 1, characterized in that: The cross section of the knitted sleeve (1) is rectangular.

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