Slender shaft sleeve convenient to assemble and disassemble for oil and gas exploitation

Abstract

The utility model discloses a slender shaft sleeve convenient to assemble and disassemble for oil and gas exploitation, which comprises an inner sleeve and an outer sleeve, the outer sleeve is sleeved at the center of the inner sleeve, outer threads are arranged on the outer walls of two ends of the inner sleeve, locking grooves are arranged on two sides of the end portion of the inner sleeve provided with the outer threads, and the locking grooves on two sides are symmetrically arranged. The end of the inner sleeve is in threaded connection with a locking nut through an external thread, a belleville spring is installed between the locking nut and the outer sleeve, and the two end faces of the belleville spring abut against the outer sleeve and the locking nut respectively. And the dependence on professional tools is reduced. Due to the fact that the assembling and disassembling process is simple and convenient, the risk that the shaft sleeve or the shaft is damaged in the disassembling process is avoided, when the shaft sleeve is abraded due to the split type design, only the outer sleeve part on the outer side needs to be replaced, and the replacement time is greatly shortened.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of slender shaft, concretely relates to an oil and gas exploitation convenient to assemble and disassemble slender shaft sleeve. BACKGROUND

[0002] In the oil and gas exploitation equipment, the slender shaft is the key transmission component, and the length of the shaft sleeve is usually longer than that of other types of shafts to adapt to the structural characteristics and bearing requirements of the slender shaft, to ensure sufficient strength and rigidity. However, the existing slender shaft sleeve adopts a tight fit installation mode, that is, the shaft sleeve and the shaft are fixed by interference fit. Although this installation mode can ensure the close combination between the shaft sleeve and the shaft, it has significant difficulties in assembly and disassembly. Specifically, the tight fit installation mode requires a large assembly force, which not only increases the assembly difficulty, but also easily damages the shaft sleeve or the shaft itself during disassembly, resulting in an increase in maintenance cost and a shortening of the service life of the equipment. In addition, due to the large length of the slender shaft sleeve in the oil and gas exploitation equipment, it is very inconvenient and costly to replace the entire shaft sleeve once it is worn or damaged. Therefore, the utility model provides a slender shaft sleeve convenient to assemble and disassemble, which reduces the assembly and maintenance difficulty, avoids damage to the shaft sleeve or the shaft during disassembly, reduces the maintenance cost, shortens the replacement time, and improves the operation efficiency and reliability of the oil and gas exploitation equipment.

[0003] For the problems in the related art, no effective solution has been proposed so far. CONTENT OF THE UTILITY MODEL

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: an oil and gas exploitation slender shaft sleeve convenient to assemble and disassemble, comprising an inner sleeve and an outer sleeve, the outer sleeve is sleeved at the center of the inner sleeve, the outer wall of both ends of the inner sleeve is provided with external threads, the inner sleeve is provided with locking grooves on both sides of the end portion provided with external threads, the locking grooves on both sides are symmetrically arranged, the end portion of the inner sleeve is threadedly connected with a locking nut through external threads, a disc spring is installed between the locking nut and the outer sleeve, and the end faces of the disc spring are respectively in abutment with the outer sleeve and the locking nut to provide continuous locking force.

[0005] As a preferred technical scheme of the utility model, both ends of the inner sleeve are conical structures, and the threaded hole inside the locking nut threadedly connected with the end portion is also a conical structure.

[0006] As a preferred technical scheme of the utility model, a sealing ring is arranged between the inner walls of the inner sleeve to ensure the sealing performance of the shaft sleeve during work.

[0007] As a preferred technical scheme of the utility model, one end of the inner sleeve is provided with a limiting ring matched with the end of the outer sleeve, and the inner sleeve and the limiting ring are integrally formed to prevent the outer sleeve from moving axially on the surface of the inner sleeve.

[0008] As a preferred technical scheme of the utility model, the outer wall of the outer sleeve is provided with a wear-resistant layer, and the wear-resistant layer is fused on the surface of the outer sleeve by laser to improve the wear resistance of the sleeve and prolong the service life.

[0009] As a preferred technical scheme of the utility model, one side of the surface of the locking nut is provided with an anti-loosening mark to ensure that the fastening state of the nut is easy to check and confirm during assembly and disassembly.

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

[0011] (1) The utility model adopts the split type design, so that the installation and disassembly of the sleeve become simple and fast, the assembly and maintenance difficulty is significantly reduced, and the dependence on professional tools is reduced. Due to the simple assembly and disassembly process, the risk of damage to the sleeve or shaft during disassembly is avoided, thereby reducing the maintenance cost and prolonging the service life of the equipment. The split type design makes it only necessary to replace the outer sleeve part on the outer side when the sleeve is worn, greatly shortens the replacement time, improves the operation efficiency and reliability of the oil and gas exploitation equipment, and the use of the disc spring ensures that the locking nut maintains appropriate pre-tightening force during assembly and disassembly, and the stability and reliability of the sleeve are maintained even under the working conditions of vibration or impact.

[0012] (2) The wear-resistant layer provided on the outer wall of the outer sleeve enhances the wear resistance of the sleeve by laser cladding technology, prolongs the service life of the sleeve, reduces the replacement frequency and maintenance cost. The anti-loosening mark on the locking nut makes it easy to check and confirm the locking state during assembly and disassembly, and ensures the safe operation of the equipment. BRIEF DESCRIPTION OF DRAWINGS

[0013] The drawings are used to provide a further understanding of the utility model, and constitute a part of the specification, together with the embodiments of the utility model, to explain the utility model, and do not constitute a limitation on the utility model. In the drawings:

[0014] Fig. 1 It is a cross-sectional structure schematic view of the utility model;

[0015] Fig. 2 It is a structure schematic view of the end of the inner sleeve in the utility model;

[0016] In the drawing: 1, outer sleeve; 2, inner sleeve; 3, outer thread; 4, locking groove; 5, locking nut; 6, disc spring; 7, sealing ring; 8, limiting ring; 9, wear-resistant layer. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the utility model will be apparently and completely described in connection with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skilled in the art without creative labor fall within the scope of the utility model.

[0018] Embodiment

[0019] Please refer to Figs. 1-2 The utility model provides the following technical scheme: an elongated shaft sleeve convenient to assemble and disassemble for oil and gas exploitation, which comprises an inner sleeve 2 and an outer sleeve 1, the outer sleeve 1 is sleeved at the center of the inner sleeve 2, outer threads 3 are arranged on the outer wall of both ends of the inner sleeve 2, locking grooves 4 are arranged on both sides of the end portion of the inner sleeve 2 where the outer threads 3 are arranged, the locking grooves 4 on both sides are symmetrically arranged, a locking nut 5 is threadedly connected to the end portion of the inner sleeve 2 through the outer threads 3, a disc spring 6 is arranged between the locking nut 5 and the outer sleeve 1, the end faces of the disc spring 6 are respectively in abutment with the outer sleeve 1 and the locking nut 5 to provide continuous locking force, both ends of the inner sleeve 2 are conical structures, and the threaded hole in the locking nut 5 threadedly connected to the end portion is also a conical structure, in the embodiment, the split type design simplifies the assembly and disassembly of the sleeve, reduces the assembly and maintenance difficulty, and reduces the demand for professional tools. This design avoids damage to the sleeve or shaft during disassembly, reduces maintenance cost and prolongs the service life of the equipment. Only the worn outer sleeve 1 needs to be replaced, the replacement time is shortened, and the operation efficiency and reliability of the oil and gas exploitation equipment are improved. The disc spring 6 ensures that the locking nut 5 maintains appropriate pre-tightening force during assembly and disassembly, and ensures the stability and reliability of the sleeve under various working conditions.

[0020] In order to ensure the sealing performance of the sleeve during work, in the embodiment, as one of the preferred technical solutions of the utility model, a sealing ring 7 is arranged between the inner walls of the inner sleeve 2.

[0021] In order to prevent the outer sleeve 1 from moving axially on the surface of the inner sleeve 2, in the embodiment, as one of the preferred technical solutions of the utility model, one end of the inner sleeve 2 is provided with a limiting ring 8 matched with the end portion of the outer sleeve 1, and the inner sleeve 2 and the limiting ring 8 are integrally formed.

[0022] In order to improve the wear resistance of the sleeve and prolong the service life, in the embodiment, as one of the preferred technical solutions of the utility model, a wear-resistant layer 9 is arranged on the outer wall of the outer sleeve 1, and the wear-resistant layer 9 is laser cladded on the surface of the outer sleeve 1.

[0023] In order to ensure that the fastening state of the lock nut 5 is easy to check and confirm during loading and unloading, in the embodiment, as a preferred technical scheme of the utility model, a loosening prevention mark is arranged on one side of the surface of the lock nut 5.

[0024] According to the above technical scheme of the utility model, during installation, firstly, the inner sleeve 2 is inserted into one end of the outer sleeve 1, then the two lock nuts 5 and the disc springs 6 are respectively sleeved on the threaded portions at the two ends of the inner sleeve 2, the lock nuts 5 are pre-tightened, the inner sleeve 2, in which the outer sleeve 1, the disc springs 6 and the lock nuts 5 are sleeved, is sleeved on the end portion of the elongated shaft, the positions of the two ends of the inner sleeve 2, which are provided with the locking grooves 4, are tightly fitted on the end portion of the elongated shaft by the lock nuts 5 at the two ends of the inner sleeve 2, and the inner sleeve 2 is fixed by the friction force, and when the lock nuts 5 are tightened, the end portion of the outer sleeve 1 presses the disc springs 6, the disc springs 6 are deformed after being stressed, and store a certain potential energy, and when the lock nuts 5 are loosened, the disc springs 6 release part of the potential energy to maintain the locking force of the lock nuts 5, and prevent the lock nuts 5 from being loosened.

[0025] Finally, it should be noted that: in the utility model, unless otherwise specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection" and the like should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrated; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium; it can be the communication between two elements or the interaction relationship between two elements, unless otherwise specified, the above terms in the utility model can be understood according to the specific meaning of the above terms in the utility model by the person skilled in the art.

[0026] The above only describes the preferred embodiments of the utility model, and is not used to limit the utility model, although the utility model has been described in detail with reference to the foregoing embodiments, the person skilled in the art can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A slender shaft sleeve for oil and gas production that is easy to assemble and disassemble, characterized by: The invention comprises an inner sleeve (2) and an outer sleeve (1), wherein the outer sleeve (1) is sleeved at the center of the inner sleeve (2), and the outer walls at both ends of the inner sleeve (2) are provided with external threads (3). The inner sleeve (2) is provided with locking grooves (4) on both sides of the end portion provided with the external threads (3), and the locking grooves (4) on both sides are symmetrically arranged. The end portion of the inner sleeve (2) is threadedly connected to a locking nut (5) through the external threads (3), and a disc spring (6) is installed between the locking nut (5) and the outer sleeve (1), and the two end surfaces of the disc spring (6) are respectively in contact with the outer sleeve (1) and the locking nut (5).

2. The slender shaft sleeve for oil and gas production according to claim 1, which is easy to assemble and disassemble, is characterized in that: Both ends of the inner sleeve (2) are in a conical structure, and the threaded hole inside the locking nut (5) threadedly connected to the end is also in a conical structure.

3. The oil and gas mining method according to claim 1, wherein the slender shaft sleeve is easy to assemble and disassemble, and the characteristics are: A sealing ring (7) is provided between the inner walls of the inner sleeve (2).

4. The oil and gas mining method according to claim 1, wherein the slender shaft sleeve is easy to assemble and disassemble, and the characteristics are: One end of the inner sleeve (2) is provided with a limiting ring (8) that matches the end of the outer sleeve (1); the inner sleeve (2) and the limiting ring (8) are an integrally formed structure.

5. The slender shaft sleeve for oil and gas production that is easy to assemble and disassemble according to claim 1, characterized in that: The outer wall of the outer jacket (1) is provided with a wear-resistant layer (9), and the wear-resistant layer (9) is clad on the surface of the outer jacket (1) by laser cladding.

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