High-pressure oxygen bomb nut with set screw and sawtooth threads

Abstract

The high-pressure oxygen bomb nut comprises a barrel, a center block is placed at the upper end of the barrel, a locking nut is arranged at the upper end of the barrel, and the sawtooth threads are arranged on the outer side surface of the upper end of the barrel and the inner side surface of the lower end of the locking nut. Locking screws penetrate through the outer surface of the locking nut, and the locking screws are evenly arranged on the upper surface of the locking nut. According to the high-pressure oxygen bomb nut provided with the set screw and the sawtooth threads, the unique structural design of the sawtooth threads is adopted, excellent anti-loosening performance is provided for locking the nut, the tooth form of the sawtooth threads has obvious asymmetry, one side of the sawtooth threads is a bearing face, and the other side of the sawtooth threads is a non-bearing face. When the locking nut bears outward pulling force or impact force generated by fluctuation of internal pressure in the high-pressure environment of the high-pressure oxygen bomb, the bearing face of the sawtooth thread can effectively resist the action of the force, and a stable supporting structure is formed.

Description

TECHNICAL FIELD

[0001] The utility model relates to high pressure oxygen bomb nut technical field, concretely is a kind of high pressure oxygen bomb nut with set tight screw and sawtooth thread. BACKGROUND

[0002] In the high pressure oxygen bomb related technical field, the conventional high pressure oxygen bomb nut structure usually adopts the thread connection design of general, this single thread connection mode faces severe challenge in the actual operating environment of high pressure oxygen bomb, the inside of high pressure oxygen bomb generates sustained high pressure environment when working, with the fluctuation of pressure, strong impact force and vibration force can be generated to nut, under the long-term repeated external force, the nut of ordinary thread connection is prone to loosening phenomenon, once nut loosens, high pressure gas in the inside of high pressure oxygen bomb can leak, which not only leads to the failure of experiment or application process, more seriously, high pressure gas leakage can cause a series of safety accidents, the life health of surrounding personnel and equipment facilities are greatly threatened, and in some complex industrial production or scientific research experimental scene, high pressure oxygen bomb can also face the superimposed influence of temperature change, mechanical vibration and other various adverse factors, which further aggravates the risk of nut loosening, due to lack of effective anti-loosening design, when transporting or storing high pressure oxygen bomb, even if not in working condition, slight jolt or shaking can also lead to nut loosening, so that high pressure oxygen bomb is in unsafe state before subsequent use, at present, the fixing mode between most oxygen bomb nut and cylinder is only by screwing thread, thread adopts general taper thread, when needing to carry out the combustion test of high energy-containing material, the anti-loosening type and self-locking property provided by taper thread cannot be reliably guaranteed. CONTENT OF UTILITY MODEL

[0003] The utility model aims at providing a kind of high pressure oxygen bomb nut with tight screw and sawtooth thread to solve the problem of poor anti-loosening type and self-locking property raised in the above background.

[0004] To achieve the above object, the utility model provides the following technical scheme: a kind of high pressure oxygen bomb nut with tight screw and sawtooth thread, including cylinder, the upper end of the cylinder is placed with center block, and the upper end of the cylinder is provided with locking nut, the outer surface of the upper end of the cylinder and the inner surface of the lower end of locking nut are all provided with sawtooth thread, the upper end of the cylinder is provided with contact surface, and the outer surface of the middle segment of the cylinder is fixedly provided with lower friction ring, the outer surface of the locking nut is fixedly provided with upper friction ring, the outer surface of the locking nut is penetrated by locking screw, and locking screw is evenly arranged on the upper surface of locking nut.

[0005] Preferably, the cylinder is threadedly connected with the locking nut by the sawtooth thread, and the sawtooth thread is located on the outer surface of the cylinder between the contact surface and the lower friction ring.

[0006] The above technical solution enables the cylinder and the locking nut to be connected more stably.

[0007] Preferably, the lower end of the locking screw is in clearance fit with the locking nut, the locking screw is in threaded connection with the center block, the inner side surface of the lower end of the center block is in abutment with the contact surface, and the cross section of the inner side surface of the lower end of the center block and the contact surface are both elliptical in design.

[0008] The above technical solution enables the center block to be unable to rotate relative to the cylinder.

[0009] Preferably, the upper surface of the locking nut is provided with a rotating anti-escape ring, and the outer surface of the anti-escape ring is provided with a clearance hole.

[0010] The above technical solution enables the anti-escape ring to limit the upper end of the locking screw.

[0011] Preferably, the lower surface of the anti-escape ring is in abutment with the upper surface of the locking nut, and the connection part of the anti-escape ring and the locking nut is T-shaped in longitudinal section.

[0012] The above technical solution enables the anti-escape ring to be stably connected with the locking nut.

[0013] Preferably, the clearance holes are uniformly arranged on the outer surface of the anti-escape ring, the included angle between the centers of two adjacent clearance holes is greater than the included angle between the centers of two adjacent locking screws, and the number of the clearance holes is greater than the number of the locking screws.

[0014] The above technical solution enables the locking screws to not be aligned with the clearance holes at the same time.

[0015] Preferably, the upper and lower ends of the clearance hole are both arc chamfered, and the inner diameter of the clearance hole is greater than the maximum outer diameter of the upper end of the locking screw.

[0016] The above technical solution enables the locking screw to rotate by extruding the arc chamfer of the clearance hole when loosened, so as to ensure that the loosened locking screw can be stably clamped with the clearance hole to limit the anti-escape ring.

[0017] Compared with the prior art, the high-pressure oxygen bomb nut with the locking screw and the sawtooth thread has the beneficial effects that:

[0018] 1. The unique structure design of the sawtooth thread provides excellent anti-loosening performance for the locking nut, the tooth profile of the sawtooth thread has obvious asymmetry, one side is a bearing surface and the other side is a non-bearing surface, so that when the locking nut bears outward tension or impact force due to internal pressure fluctuation in the high-pressure environment of the high-pressure bomb, the bearing surface of the sawtooth thread can effectively resist the action of the force, forming a stable support structure, and because the bearing surface forms a specific angle with the direction of the force, the friction between the threads is significantly increased, thereby greatly limiting the rotational movement of the locking nut relative to the cylinder and effectively preventing the locking nut from loosening;

[0019] 2. Further, by providing the anti-dropping ring on the upper surface of the locking nut, the anti-dropping ring blocks the upward displacement tendency of the upper end surface of the locking screw, so that the locking screw does not loosen due to external force during the process of locking the relative position of the cylinder and the locking nut, thereby enabling the locking nut to be stably connected with the cylinder;

[0020] 3. Further, by providing different numbers of locking screws and clearance holes, the locking screws at different positions cannot be aligned with the clearance holes at the same time, so that even if a locking screw is rotated upward into the clearance hole due to vibration, the remaining locking screws cannot be aligned with the clearance holes at the same time, thereby ensuring that when one locking screw loosens, the remaining locking screws can be stably limited. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a whole three-dimensional structure schematic diagram of the utility model;

[0022] Figure 2 It is a three-dimensional structure schematic diagram of the anti-dropping ring and the clearance hole connection of the utility model;

[0023] Figure 3 It is a whole three-dimensional explosion structure schematic diagram of the utility model;

[0024] Figure 4 It is a whole three-dimensional cross-section structure schematic diagram of the utility model;

[0025] Figure 5 It is a three-dimensional cross-section structure schematic diagram of the center block and the contact surface connection of the utility model;

[0026] Figure 6 It is a three-dimensional structure schematic diagram of the cylinder, the sawtooth thread and the contact surface connection of the utility model.

[0027] In the figure: 1, cylinder; 2, center block; 3, locking nut; 4, sawtooth thread; 5, contact surface; 6, lower friction ring; 7, upper friction ring; 8, locking screw; 9, anti-dropping ring; 10, clearance hole. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the utility model will be clearly and completely described in conjunction with the drawings of 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 of the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0029] Please refer to Figures 1-6 The utility model provides a kind of technical scheme: a high-pressure oxygen bomb nut with locking screw and sawtooth thread, including cylinder body 1, the upper end of cylinder body 1 is placed with center block 2, and the upper end of cylinder body 1 is provided with locking nut 3, the upper end outside surface of cylinder body 1 and the lower end inside surface of locking nut 3 are all provided with sawtooth thread 4, the upper end of cylinder body 1 is provided with contact surface 5, and the outer surface of the middle section of cylinder body 1 is fixedly provided with lower friction ring 6, the upper end outside surface of locking nut 3 is fixedly provided with upper friction ring 7, the outer surface of locking nut 3 is penetrated by locking screw 8, and locking screw 8 is evenly arranged on the upper surface of locking nut 3.

[0030] Cylinder body 1 is threadedly connected with locking nut 3 through sawtooth thread 4, and sawtooth thread 4 is located between the outer lateral surface of cylinder body 1 between contact surface 5 and lower friction ring 6.

[0031] The lower end of locking screw 8 is gap-fitted with locking nut 3, and locking screw 8 is threadedly connected with center block 2, and the lower end inside surface of center block 2 is attached to contact surface 5, and the lower end inside surface of center block 2 and the cross section of contact surface 5 are both elliptical in design.

[0032] In the normal use process, first, center block 2 is placed on the upper end of cylinder body 1, and is stably placed by the attachment of contact surface 5 and the lower end inside surface of center block 2, then locking nut 3 is covered above center block 2, so that the upper end of center block 2 penetrates through locking nut 3, at this time, locking nut 3 is held by upper friction ring 7, and cylinder body 1 is held by lower friction ring 6, and locking nut 3 is rotated, at this time, locking nut 3 is threadedly connected with cylinder body 1 through sawtooth thread 4, and locking nut 3 is gradually moved downward in the rotating process, until the inner top surface of locking nut 3 is attached to the upper surface of center block 2, and center block 2 is pressed tightly on the upper end of cylinder body 1, then locking screw 8 is inserted into locking nut 3 and screwed into the upper surface of center block 2, until locking screw 8 locks the relative position between locking nut 3 and center block 2, at this time, since the lower end inside surface of center block 2 and the cross section of contact surface 5 are both elliptical in design, center block 2 cannot rotate relative to cylinder body 1, so that locking nut 3 relative to center block 2 cannot rotate relative to cylinder body 1, which ensures the limitation of locking nut 3 on the relative position between cylinder body 1 and center block 2.

[0033] The upper surface of the locking nut 3 is provided with a rotating anti-loosing ring 9, and the outer surface of the anti-loosing ring 9 is provided with a clearance hole 10.

[0034] The lower surface of the anti-loosing ring 9 is attached to the upper surface of the locking nut 3, and the connection between the anti-loosing ring 9 and the locking nut 3 is in T shape in longitudinal section.

[0035] The clearance holes 10 are uniformly arranged on the outer surface of the anti-loosing ring 9, and the included angle between the centers of two adjacent clearance holes 10 is greater than the included angle between the centers of two adjacent locking screws 8, and the number of the clearance holes 10 is greater than the number of the locking screws 8.

[0036] The upper and lower ends of the clearance hole 10 are arc chamfered, and the inner diameter of the clearance hole 10 is greater than the maximum outer diameter of the upper end of the locking screw 8.

[0037] When the external vibration is strong or other factors cause the locking screw 8 to have a loosening trend, at this time, with the rotation of the locking screw 8, the upper end of the locking screw 8 protrudes and is engaged with one of the clearance holes 10 of the anti-loosing ring 9, at this time, when the locking screw 8 is completely separated from the connection with the center block 2, the lower end of the locking screw 8 is clamped in the through hole on the surface of the locking nut 3, so that the anti-loosing ring 9 cannot continue to rotate, at this time, the clearance hole 10 on the surface of the anti-loosing ring 9 is arranged in dislocation with the remaining locking screws 8, so as to ensure that all the locking screws 8 cannot be loosened and failed at the same time.

[0038] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A high-pressure oxygen bomb nut provided with a jam nut and a sawtooth thread, comprising a cylinder (1), the upper end of the cylinder (1) being provided with a center block (2), and the upper end of the cylinder (1) being provided with a locking nut (3), characterized in that: The upper end outer surface of the barrel (1) and the lower end inner surface of the locking nut (3) are provided with sawtooth threads (4), the upper end of the barrel (1) is provided with a contact surface (5), and the middle section outer surface of the barrel (1) is fixedly provided with a lower friction ring (6), the upper end outer surface of the locking nut (3) is fixedly provided with an upper friction ring (7), the outer surface of the locking nut (3) is penetrated by locking screws (8), and the locking screws (8) are uniformly arranged on the upper surface of the locking nut (3).

2. The bomb nut according to claim 1, wherein: The barrel (1) is threadedly connected with the locking nut (3) through the sawtooth threads (4), and the sawtooth threads (4) are located on the outer surface of the barrel (1) between the contact surface (5) and the lower friction ring (6).

3. The bomb nut of claim 1, wherein: The lower end of the locking screw (8) is clearance-fitted with the locking nut (3), the locking screw (8) is threadedly connected with the center block (2), the lower end inner surface of the center block (2) is in abutment with the contact surface (5), and the lower end inner surface of the center block (2) and the contact surface (5) are both designed in an elliptical shape.

4. The bomb nut of claim 1, wherein: The locking nut (3) is provided with a rotating anti-disengagement ring (9) on the upper surface, and the outer surface of the anti-disengagement ring (9) is provided with a clearance hole (10).

5. A bomb nut for high pressure oxygen with a binding screw and a sawtooth thread according to claim 4, characterized in that: The lower surface of the anti-disengagement ring (9) is in abutment with the upper surface of the locking nut (3), and the connection between the anti-disengagement ring (9) and the locking nut (3) is in a T-shaped longitudinal section.

6. A bomb nut for high pressure oxygen with a binding screw and a sawtooth thread according to claim 4, characterized in that: The clearance holes (10) are uniformly arranged on the outer surface of the anti-disengagement ring (9), the included angle between the centers of two adjacent clearance holes (10) is greater than the included angle between the centers of two adjacent locking screws (8), and the number of the clearance holes (10) is greater than the number of the locking screws (8).

7. The high pressure bomb nut with a jam nut and a sawtooth thread of claim 4, wherein: The upper and lower ends of the clearance hole (10) are both designed in an arc-shaped chamfer, and the inner diameter of the clearance hole (10) is greater than the maximum outer diameter of the upper end of the locking screw (8).

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