Explosion-proof movable joint

Abstract

The utility model belongs to the technical field of anti-explosion movable joints, and particularly relates to an anti-explosion movable joint which comprises a first joint, a second joint, a third joint and a fourth joint. The second connector is provided with a second connecting end and a second threaded end, and a threaded structure is arranged on the peripheral side of the second connecting end; the connecting nut is mounted on the first connecting end of the first connector and is in threaded connection with the second connecting end; the first sealing washer is arranged between the first connecting end and the second connecting end; the first connecting end is provided with a first slot and a V-shaped elastic connecting sheet, and one end of the V-shaped elastic connecting sheet is connected with the inner wall of the first slot; the second connecting end is provided with a first inserting block, and the first inserting block is connected with the first inserting groove in an inserted mode and abuts against the other end of the V-shaped elastic connecting piece. The utility model has the beneficial effects that the first insertion block is abutted against and attached to the inside of the V-shaped connecting sheet, so that the dual-sealing effect is realized, the connecting and sealing performance of the first joint and the second joint is enhanced, and the use safety is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of explosion -proof union, especially relates to an explosion -proof union. BACKGROUND

[0002] Explosion -proof union is a kind of safety device for connecting pipeline, equipment or cable system, with explosion -proof function, usually used to prevent fire or explosion in explosive gas environment.In prior art, explosion -proof union is mostly composed of two joints, connecting nut and sealing washer, connecting nut is installed on one of the joints and is in threaded connection with the other joint, so that the two joints are fastened and connected together, and sealing washer is arranged between the two joints to ensure the connection sealing property between the two joints.Because sealing washer is generally made of rubber material, long-time extrusion can cause hardening and poor elasticity, thereby affecting the sealing performance between the two joints. CONTENT OF UTILITY MODEL

[0003] The utility model aims at the above-mentioned technical problem, provides an explosion -proof union to solve the above-mentioned technical problem.

[0004] Therefore, the utility model provides an explosion -proof union, which comprises:

[0005] First joint, first joint is provided with first connecting end and first threaded end on the two ends in axial direction respectively;

[0006] Second joint, second joint is provided with second connecting end and second threaded end on the two ends in axial direction respectively, and threaded structure is arranged on the circumferential side of second connecting end;

[0007] Connecting nut, connecting nut is installed on the first connecting end of first connecting head and is in threaded connection with second connecting end;

[0008] First sealing washer, first sealing washer is arranged between first connecting end and second connecting end;

[0009] Wherein, first connecting end is provided with first slot and V-shaped elastic connecting piece, one end of V-shaped elastic connecting piece is connected with the inner wall of first slot;Second connecting end is provided with first plug, and first plug is inserted with first slot and abuts against the other end of V-shaped elastic connecting piece.

[0010] Further, the first plug is provided with inclined surface structure, and the end portion of the V-shaped elastic connecting piece is adapted to abut against the inclined surface structure.

[0011] Further, the V-shaped elastic connecting piece is integrally connected with the inner wall of the first slot.

[0012] Further, the first connecting end is further provided with a second plug, and the second connecting end is further provided with a second slot.

[0013] The second plug block is adapted to be inserted into the second slot.

[0014] Further, the second sealing gasket is arranged between the second plug block and the second slot.

[0015] Further, the first joint, the second joint and the connecting nut are provided with anticorrosive coating.

[0016] The utility model discloses the beneficial effects are:

[0017] By setting the first slot and V-shaped elastic connecting piece on the first joint and the first plug block on the second joint, the insertion of the first plug block and the first slot is used to guide and position the connection of the first joint and the second joint, and the connection stability of the first joint and the second joint is enhanced. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is the structural schematic diagram of the utility model;

[0019] Figure 2 is the internal structure section view of the utility model;

[0020] Figure 3 is the A place structure enlarged schematic diagram in the utility model Figure 2

[0021] The figure mark is shown as follows: 1, first joint;11, first connecting end;12, first threaded end;13, first slot;14, V-shaped elastic connecting piece;15, second plug block;2, second joint;21, second connecting end;22, second threaded end;23, first plug block;24, inclined plane structure;25, second slot;3, connecting nut;4, first sealing gasket;5, second sealing gasket. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present application will be clearly described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0023] ​In the description of the present application, it should be noted that the terms used herein are only intended to describe specific embodiments and are not intended to limit the exemplary embodiments according to the present application. For ease of description, the sizes of the various parts shown in the drawings are not drawn in proportion to the actual proportions. The techniques, methods and devices known to those skilled in the relevant art can not be discussed in detail, but in appropriate cases, the techniques, methods and devices should be considered as part of the authorized description. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary and not as a limitation. Therefore, other examples of exemplary embodiments can have different values. It should be noted that similar reference numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0024] Embodiment 1:

[0025] The present embodiment provides an explosion-proof live joint, comprising:

[0026] The first joint 1 is provided with a first connecting end 11 and a first threaded end 12 on the two axial ends, respectively;

[0027] The second joint 2 is provided with a second connecting end 21 and a second threaded end 22 on the two axial ends, respectively, and the second connecting end 21 is provided with a threaded structure on the circumferential side;

[0028] The connecting nut 3 is installed on the first connecting end 11 of the first connecting head and is threadedly connected with the second connecting end 21;

[0029] The first sealing washer 4 is arranged between the first connecting end 11 and the second connecting end 21;

[0030] The first connecting end 11 is provided with a first slot 13 and a V-shaped elastic connecting piece 14, one end of the V-shaped elastic connecting piece 14 is connected with the inner wall of the first slot 13; the second connecting end 21 is provided with a first plug 23, the first plug 23 is inserted with the first slot 13 and abuts with the other end of the V-shaped elastic connecting piece 14.

[0031] In the present technical solution, the V-shaped elastic connecting piece 14 is composed of two elastic metal sheets, the end portions of the two elastic metal sheets are integrally connected, are arranged in a "V" shape, and are further provided with a circular arc chamfer structure at the connecting portion, so that the connecting portion is not easy to be broken due to extrusion.

[0032] The explosion-proof live joint needs to connect two pipelines with the first threaded end 12 and the second threaded end 22 when in use, and then the first connecting end 11 and the second connecting end 21 are abutted together through the insertion of the first plug 23 and the first slot 13, the first sealing gasket 4 is arranged between the first connecting end 11 and the second connecting end 21, the first sealing gasket 4 is made of rubber material and can ensure the sealing between the first connecting end 11 and the second connecting end 21, and then the connecting nut 3 installed on the first joint 1 is rotated to threadedly connect the connecting nut 3 and the second connecting end 21, so as to realize the fastening connection between the first joint 1 and the second joint 2, and then the connection between the two pipelines is completed.

[0033] When the first plug 23 and the first slot 13 are inserted, the first plug 23 will extrude the V-shaped elastic connecting piece 14 in the first slot 13, so that the V-shaped elastic connecting piece 14 is deformed and shrinks and tightly adheres to the first plug 23, thereby achieving a sealing effect, thereby realizing the effect of double sealing, even if the first sealing gasket 4 fails, the sealing performance between the first joint 1 and the second joint 2 can be guaranteed, and the risk caused by sealing failure is reduced.

[0034] In summary, by arranging the first slot 13 and the V-shaped elastic connecting piece 14 on the first joint 1 and the first plug 23 on the second joint 2, the insertion of the first plug 23 and the first slot 13 is used to guide and position the connection of the first joint 1 and the second joint 2, thereby enhancing the connection stability of the first joint 1 and the second joint 2. At the same time, the abutment and adhesion of the first plug 23 and the V-shaped connecting piece realize the effect of double sealing, enhance the sealing performance of the connection of the first joint 1 and the second joint 2, and improve the safety in use.

[0035] Embodiment 2:

[0036] The embodiment provides an explosion-proof live joint, which comprises the technical scheme of the above-mentioned embodiment and has the following technical features.

[0037] Further, the first plug 23 is provided with a bevel structure 24, and the bevel structure 24 is adapted to abut with the end of the V-shaped elastic connecting piece 14.

[0038] Through the structure design, when the first plug 23 is inserted into the first slot 13, the bevel structure 24 on the first plug 23 is adapted to abut with one elastic metal sheet of the V-shaped elastic connecting piece 14, so as to increase the close contact area and effectively achieve the sealing effect.

[0039] Embodiment 3:

[0040] The embodiment provides an explosion-proof live joint, which comprises the technical scheme of the above-mentioned embodiment and has the following technical features.

[0041] Further, the V-shaped elastic connecting piece 14 is integrally connected with the inner wall of the first slot 13.

[0042] In the technical solution, the V-shaped elastic connecting piece 14 can be fixed in the first slot 13 by glue, or the V-shaped elastic connecting piece 14 and the inner wall of the first slot 13 can be designed as an integral structure. Preferably, the V-shaped elastic connecting piece 14 and the inner wall of the first slot 13 are designed as an integral structure, which effectively enhances the connection strength of the V-shaped elastic connecting piece 14 and the first slot 13.

[0043] Embodiment 4:

[0044] The embodiment provides an explosion-proof live joint, which comprises the technical solutions of the above-mentioned embodiments and has the following technical features.

[0045] Further, the first connecting end 11 is further provided with a second plug 15, and the second connecting end 21 is further provided with a second slot 25.

[0046] The second plug 15 is adaptively plugged into the second slot 25.

[0047] In the technical solution, the second plug 15 and the second slot 25 are plugged and matched, which further guides and positions the connection between the first joint 1 and the second joint 2, thereby effectively enhancing the connection stability between the first joint 1 and the second joint 2.

[0048] Further, the second sealing gasket 5 is further provided between the second plug 15 and the second slot 25. The second sealing gasket 5 is made of rubber and is installed in the second slot 25. When the second plug 15 is plugged and matched with the second slot 25, the second plug 15 extrudes the second sealing gasket 5, so that the second plug 15 and the second sealing gasket 5 are tightly attached, thereby ensuring the connection sealing between the second plug 15 and the second slot 25 and effectively improving the connection sealing between the first joint 1 and the second joint 2.

[0049] Embodiment 5:

[0050] The embodiment provides an explosion-proof live joint, which comprises the technical solutions of the above-mentioned embodiments and has the following technical features.

[0051] Further, the first joint 1, the second joint 2 and the connecting nut 3 are all provided with a corrosion-resistant coating.

[0052] In the technical solution, the first joint 1, the second joint 2 and the connecting nut 3 are coated with an anticorrosive coating, which can be an epoxy coating, a polyurethane coating, a polyethylene coating or an aluminum alloy spraying, and can effectively prevent wear caused by chemical substances, water vapor and mechanical impact and friction, and has high practicability. The embodiments of the application are described above in combination with the drawings, and the embodiments and features in the embodiments in the application can be combined with each other without conflict, the application is not limited to the above specific embodiments, the above specific embodiments are only illustrative but not restrictive, and those skilled in the art can make many forms under the inspiration of the application without departing from the scope of the application and the protection scope of the claims, and all the forms belong to the protection scope of the application.

Claims

1. An explosion-proof live coupling, characterized in that, The utility model relates to a first joint (1) is provided with first connecting end (11) and first threaded end (12) respectively on the both ends of the axial direction, and second joint (2) is provided with second connecting end (21) and second threaded end (22) respectively on the both ends of the axial direction, and the periphery of second connecting end (21) is provided with threaded structure, and connecting nut (3) is installed on the first connecting end (11) of first connecting head and is connected with second connecting end (21) threadedly, and first sealing washer (4) is arranged between first connecting end (11) and second connecting end (21), wherein first connecting end (11) is provided with first slot (13) and V-shaped elastic connecting piece (14), one end of V-shaped elastic connecting piece (14) is connected with the inner wall of first slot (13), and first connecting end (21) is provided with first plug (23), and first plug (23) is inserted with first slot (13) and abuts with the other end of V-shaped elastic connecting piece (14). The first plug (23) is provided with a bevel structure (24), and the bevel structure (24) is adapted to abut with the end of the V-shaped elastic connecting piece (14). The V-shaped elastic connecting piece (14) is integrally connected with the inner wall of the first slot (13). The first connecting end (11) is further provided with a second plug (15), and the second connecting end (21) is further provided with a second slot (25). The second plug (15) is adapted to be inserted with the second slot (25). It further includes a second sealing washer (5) arranged between the second plug (15) and the second slot (25).

2. An explosion-proof live coupling according to claim 1, characterised in that The surfaces of the first joint (1), the second joint (2), and the connecting nut (3) are provided with a corrosion-resistant coating.

3. An explosion-proof live coupling according to claim 1, wherein ​ 4. An explosion-proof live coupling according to claim 1, wherein ​ ​ 5. An explosion-proof live coupling according to claim 4, characterised in that ​ 6. An explosion-proof live coupling as defined in claim 1, wherein ​

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