Explosion-proof flexible pipe formed by buckling and pressing inner and outer sleeve fixing nuts

Abstract

The utility model provides an explosion-proof flexible pipe formed by buckling and pressing inner and outer sleeve fixing nuts, which comprises a connecting hose, an outer sleeve and a flange inner sleeve, during buckling and pressing, the outer sleeve is sleeved at the end part of the connecting hose, then a buckling part of the flange inner sleeve extends into the connecting hose, and the outer wall of an end plate part of the outer sleeve is propped against a step of the flange inner sleeve; the inner wall abuts against the connecting hose, finally, the connecting hose and the buckling part are buckled together, the step is matched with the end face of the connecting hose, the position of the outer sleeve can be limited, buckling is fast and convenient, the welding procedure is omitted, the production cost is reduced, and safety and reliability are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline connection, in particular to an explosion-proof flexible pipe formed by pressing inner and outer fixed nuts. Background Art

[0002] Connecting hoses are commonly used in the fields of petroleum, chemical industry, natural gas, coal mining, etc., for the protection of cables entering and exiting explosion-proof electrical equipment, and are also used for explosion-proof purposes.

[0003] The existing common connecting hose joint assembly mainly consists of an outer sleeve, a flange inner sleeve and a nut. The outer sleeve is fixed to the end of the connecting hose, and the end of the outer sleeve is fixedly connected to the flange inner sleeve by welding. The welding method is relatively cumbersome and prone to quality problems such as cold welding. Utility Model Content

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defects of the hose connector assembly in the prior art, which is cumbersome to process and prone to cold welding, thereby providing an explosion-proof flexible pipe that is quick and convenient to process, has high safety and reliability, and is formed by pressing inner and outer fixing nuts.

[0005] To this end, the utility model provides an explosion-proof flexible tube formed by pressing and forming an inner and outer sleeve with fixed nuts, comprising: a connecting hose, an outer sleeve and a flange inner sleeve, the outer sleeve having a sleeve portion sleeved on the outer wall of the connecting hose, and an end plate portion located on one side of the sleeve portion, the inner wall of the end plate portion abuts against the end face of the connecting hose; the flange inner sleeve has a buckling portion and a step arranged in sequence, the buckling portion extends into the connecting hose and has a plurality of inverted teeth buckled with the connecting hose, and the step abuts against the outer wall of the end plate portion.

[0006] It also includes a nut, one end of the nut is provided with an inner flange, and the end of the flange inner sleeve away from the buckle portion is provided with an outer flange that abuts against the inner flange.

[0007] Also included is a threaded joint threadedly connected to the nut.

[0008] Two multi-section joining surfaces formed at right angles are provided between the threaded joint and the outer flange.

[0009] A joining surface is provided between the threaded joint and the outer flange, and the joining surface is a vertical plane.

[0010] A sealing gasket is provided between the threaded joint and the outer flange.

[0011] The connecting hose is a spiral steel wire PVC tube.

[0012] The connecting hose is a rubber-steel braided tube.

[0013] The technical solution of this utility model has the following advantages:

[0014] 1. The explosion-proof flexible tube provided by the utility model is formed by buckling and pressing an inner and outer sleeve fixing nut, and includes a connecting hose, an outer sleeve and a flange inner sleeve. When buckling, the outer sleeve is first placed on the end of the connecting hose, and then the buckling portion of the flange inner sleeve is extended into the connecting hose. The outer wall of the outer sleeve end plate abuts against the step of the flange inner sleeve, and the inner wall abuts against the connecting hose. Finally, the connecting hose and the buckling portion are buckled together. The step cooperates with the end face of the connecting hose to limit the position of the outer sleeve. This buckling is quick and convenient, eliminates the welding process, reduces production costs, and improves safety and reliability.

[0015] 2. The explosion-proof flexible pipe provided by the utility model is formed by pressing and forming an inner and outer sleeve fixing nut. A multi-section joint surface formed by two right angles is provided between the threaded joint and the outer flange, thereby increasing the area of ​​the joint surface between the threaded joint and the inner sleeve of the flange, and improving the waterproof, dustproof and explosion-proof standards. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 This is a schematic structural diagram of a first embodiment of the explosion-proof flexible pipe of the present utility model;

[0018] Figure 2 This is a partially enlarged structural diagram of an explosion-proof flexible pipe;

[0019] Figure 3 It is a structural schematic diagram of a second embodiment of an explosion-proof flexible tube;

[0020] Figure 4 A partially enlarged structural diagram of the second embodiment of the explosion-proof flexible pipe

[0021] Explanation of the accompanying symbols: 1. Connecting hose; 2. Outer sleeve; 3. Sleeve part; 4. End plate part; 5. Flange inner sleeve; 6. Snap-on part; 7. Step; 8. Undercut tooth; 9. Nut; 10. Inner flange; 11. Outer flange; 12. Threaded joint; 13. Joint surface; 14. Sealing gasket. DETAILED DESCRIPTION

[0022] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0023] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0024] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0025] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0026] Example

[0027] This embodiment provides an explosion-proof flexible pipe formed by pressing inner and outer fixing nuts. Figure 1 and Figure 3 As shown, it includes a connecting hose 1, an outer sleeve 2, a flange inner sleeve 5, a nut 9 and a threaded joint 12.

[0028] Coat 2, such as Figure 2 As shown, it has a sleeve portion 3 sleeved on the outer wall of the connecting hose 1, and an end plate portion 4 located on one side of the sleeve portion 3, and the inner wall of the end plate portion 4 is against the end face of the connecting hose 1.

[0029] like Figure 2As shown, the flange inner sleeve 5 has a snap-fitting portion 6 and a step 7 arranged in sequence. The snap-fitting portion 6 extends into the connecting hose 1 and has a plurality of inverted snap-fitting teeth 8 that are snap-fitted with the connecting hose 1. The step 7 is abutted against the outer wall of the end plate portion 4. In this embodiment, the snap-fitting teeth are inverted snap-fitting teeth, which makes the snapping more secure.

[0030] The nut 9 has an inner flange 10 at one end, and the end of the flange inner sleeve 5 away from the buckle 6 is provided with an outer flange 11 that abuts against the inner flange 10.

[0031] The threaded joint 12 is threadedly connected to the nut 9, and a joint surface 13 is provided between the threaded joint 12 and the outer flange 11. Figure 4 As shown, the joint surface 13 is a vertical plane, and a sealing gasket 14 is provided between the threaded joint 12 and the outer flange 11 .

[0032] As a convertible embodiment, Figure 2 As shown, two right-angled multi-section joint surfaces 13 are provided between the threaded joint 12 and the outer flange 11, thereby increasing the area of ​​the joint surface between the threaded joint 12 and the flange inner sleeve 11 and improving the explosion-proof performance.

[0033] Connect hose 1 as follows Figure 4 Spiral wire PVC pipe as shown or Figure 2 Rubber braided steel tubing shown.

[0034] The utility model provides an explosion-proof flexible tube formed by buckling and pressing an inner and outer sleeve fixing nut, which includes a connecting hose 1, an outer sleeve 2 and a flange inner sleeve 5. When buckling, the outer sleeve 2 is first placed on the end of the connecting hose 1, and then the buckling portion 6 of the flange inner sleeve 5 is extended into the connecting hose 1. The outer wall of the end plate portion 4 of the outer sleeve 2 abuts against the step 7 of the flange inner sleeve 5, and the inner wall abuts against the connecting hose 1. Finally, the connecting hose 1 and the buckling portion 6 are buckled together, and the step 7 cooperates with the end face of the connecting hose 1 to limit the position of the outer sleeve 2. This buckling is quick and convenient, eliminates the welding process, reduces production costs, and improves safety and reliability.

[0035] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. An explosion-proof flexible pipe formed by pressing inner and outer fixing nuts, characterized in that: include: Connecting hose (1); The outer sleeve (2) comprises a sleeve portion (3) sleeved on the outer wall of the connecting hose (1), and an end plate portion (4) located on one side of the sleeve portion (3), wherein the inner wall of the end plate portion (4) abuts against the end surface of the connecting hose (1); The flange inner sleeve (5) has a buckling portion (6) and a step (7) arranged in sequence, the buckling portion (6) extends into the connecting hose (1) and has a plurality of undercut teeth (8) buckled with the connecting hose (1), and the step (7) abuts against the outer wall of the end plate portion (4).

2. The explosion-proof flexible pipe formed by pressing inner and outer fixing nuts according to claim 1, characterized in that: It also includes a nut (9), one end of which is provided with an inner flange (10), and the end of the flange inner sleeve (5) away from the buckle portion (6) is provided with an outer flange (11) that abuts against the inner flange (10).

3. The explosion-proof flexible pipe formed by pressing inner and outer fixing nuts according to claim 2, characterized in that: It also includes a threaded joint (12) threadedly connected to the nut (9).

4. The explosion-proof flexible pipe formed by pressing inner and outer fixing nuts according to claim 3, characterized in that: Two multi-section joining surfaces (13) formed at right angles are provided between the threaded joint (12) and the outer flange (11).

5. The explosion-proof flexible pipe formed by pressing inner and outer fixing nuts according to claim 3, characterized in that: A joining surface (13) is provided between the threaded joint (12) and the outer flange (11), and the joining surface (13) is a vertical plane.

6. The explosion-proof flexible pipe formed by pressing inner and outer fixing nuts according to claim 3 or 5, characterized in that: A sealing gasket (14) is provided between the threaded joint (12) and the outer flange (11).

7. The explosion-proof flexible pipe formed by pressing inner and outer fixing nuts according to claim 1, characterized in that: The connecting hose (1) is a spiral steel wire PVC tube.

8. The explosion-proof flexible pipe formed by pressing inner and outer fixing nuts according to claim 1, characterized in that: The connecting hose (1) is a rubber-steel braided tube.

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