Gas braided metal coated hose assembly

Abstract

The utility model relates to the technical field of gas pipes, and discloses a gas braided metal coated hose assembly, which is characterized by comprising a rubber inner pipe, a metal braided layer coated outside the rubber inner pipe, a PE (polyethylene) layer coated outside the metal braided layer, joint parts arranged at two ends of the rubber inner pipe, and a first nut and a second nut which are in threaded connection are connected with each other through threads. The steel sleeve is clamped between the first nut and the second nut, the abutting force between the steel sleeve and the first nut is increased, the sealing performance between the steel sleeve and the first nut is improved, the firmness of the first nut and the connector is improved, the first nut and the connector are difficult to separate from the rubber inner pipe under the action of external force, and the service life of the rubber inner pipe is prolonged. The first step determines the mounting position of the connector, so that after the connector extends into the first nut, the ring of the connector abuts against the first step, and the depth of the connector extending into the rubber inner pipe is limited.

Description

Technical Field

[0001] The utility model relates to the technical field of gas pipes, and more specifically to a gas braided metal sheathed hose assembly. Background Art

[0002] The gas pipe is a special pipe for conveying combustible gas. It is a metal gas hose that replaces the traditional rubber hose with a buckle. It can solve the defects of rubber hoses that are easy to fall off, easy to age, easy to be bitten by insects, and have a short practical life.

[0003] Among them, the braided gas hose is a type of gas pipe. Both ends of the braided gas hose are connected with joints and other parts. The joint parts are mostly nuts, steel sleeves and connectors. The steel sleeves are arranged on the outside of the braided hose and are tightened by pipe crimping tools. On the one hand, it increases the sealing performance, and on the other hand, it increases the anti-detachment ability of the connector. However, there is still a situation where the connector is detached from the braided hose under the action of external force. Utility Model Content

[0004] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a gas braided metal sheathed hose assembly for preventing a connector from being separated from the braided hose.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a gas braided metal sheathed hose assembly, comprising a rubber inner tube, the rubber inner tube is coated with a metal braided layer, the metal braided layer is coated with a PE layer, both ends of the rubber inner tube are provided with joints, the joints include a first nut, a connecting head and a second nut, both ends of the PE layer are tightly pressed with a steel sleeve, the connecting head passes through the corresponding first nut and extends into the rubber inner tube, the second nut is sleeved outside the steel sleeve, the tail end of the second nut is abutted against the tail end of the steel sleeve, and is threadedly connected to the first nut.

[0006] As a further improvement of the present invention, a first step is formed in the first nut, and a ring is formed at the end of the connecting head, and the ring abuts against the first step.

[0007] As a further improvement of the present invention, a second step is formed in the first nut, and the second step abuts against the end of the steel sleeve.

[0008] As a further improvement of the present invention, a sealing ring is provided between the second step and the steel sleeve.

[0009] As a further improvement of the utility model, the first nut is provided with a first external thread and a first internal thread, the second nut is formed with a second internal thread, the second internal thread is threadedly connected to the first external thread, and the first internal thread is connected to the gas joint.

[0010] As a further improvement of the utility model, a plurality of annular grooves are formed on the connecting head, and an annular protrusion is formed between two adjacent annular grooves.

[0011] As a further improvement of the present invention, the tail end of the second nut is recessed inward to form an embedded ring, and the embedded ring abuts against the tail end of the steel sleeve.

[0012] The beneficial effects of the utility model are as follows: after the first nut and the second nut are threadedly connected in the utility model, the steel sleeve is clamped between the first nut and the second nut, the resistance force between the steel sleeve and the first nut is increased, thereby improving the sealing between the two, and increasing the firmness of the first nut and the connecting head. The first nut and the connecting head are difficult to separate from the rubber inner tube under the action of external force. The first step determines the installation position of the connecting head, so that after the connecting head is inserted into the first nut, its ring is resisted against the first step, thereby limiting the depth of the connecting head inserted into the rubber inner tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a cross-sectional structural schematic diagram of the utility model;

[0014] Figure 2 This utility model Figure 1 Schematic diagram of the enlarged structure at point A in the middle.

[0015] Figure numerals: 1. rubber inner tube; 2. metal braided layer; 3. PE layer; 4. first nut; 41. first step; 42. second step; 43. first external thread; 44. first internal thread; 5. connector; 51. ring; 52. ring groove; 53. annular protrusion; 6. second nut; 61. second internal thread; 62. embedded ring; 7. steel sleeve. DETAILED DESCRIPTION

[0016] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. The same parts are represented by the same reference numerals. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to directions in the accompanying drawings, and the words "bottom surface" and "top surface", "inside" and "outside" refer to directions toward or away from the geometric center of a specific component, respectively.

[0017] Reference Figure 1 and Figure 2 As shown, a gas braided metal sheathed hose assembly of this embodiment includes a rubber inner tube 1, the rubber inner tube 1 is coated with a metal braided layer 2, the metal braided layer 2 can protect the rubber hose and prevent it from being punctured by hard objects; the metal braided layer 2 is coated with a PE layer 3, and the PE layer 3 is used to protect the metal braided layer 2;

[0018] Both ends of the rubber inner tube 1 are provided with joints, which include a first nut 4, a connector 5 and a second nut 6. Both ends of the PE layer 3 are tightly pressed with a steel sleeve 7. The connector 5 passes through the corresponding first nut 4 and extends into the rubber inner tube 1. The second nut 6 is sleeved outside the steel sleeve 7. The tail end of the second nut 6 abuts against the tail end of the steel sleeve 7 and is threadedly connected with the first nut 4. After the first nut 4 is threadedly connected with the second nut 6, the tail end of the second nut 6 abuts against the tail end of the steel sleeve 7, so that the steel sleeve 7 is clamped between the first nut 4 and the second nut 6, increasing the resistance force between the steel sleeve 7 and the first nut 4, thereby improving the sealing between the two, and increasing the firmness of the first nut 4 and the connector 5. The first nut 4 and the connector 5 are difficult to separate from the rubber inner tube 1 under the action of external force.

[0019] Reference Figure 1 and Figure 2 As shown, a first step 41 is formed in the first nut 4, and a ring 51 is formed at the end of the connector 5, the ring 51 abuts against the first step 41, and the first step 41 determines the installation position of the connector 5, so that after the connector 5 is inserted into the first nut 4, the ring 51 abuts against the first step 41, thereby limiting the depth of the connector 5 inserted into the rubber inner tube 1.

[0020] Reference Figure 2 As shown, a second step 42 is formed in the first nut 4, and the second step 42 abuts against the end of the steel sleeve 7. The second step 42 defines the positional relationship between the steel sleeve 7 and the first nut 4, thereby forming an installation positioning.

[0021] Reference Figure 1 As shown, a sealing ring is arranged between the second step 42 and the steel sleeve 7, and the sealing ring increases the sealing between the first nut 4 and the steel sleeve 7. After the second nut 6 is threadedly connected to the first nut 4, the sealing ring will be clamped by the first nut 4 and the steel sleeve 7, thereby achieving sealing between the two, and further improving the sealing performance of the braided gas hose.

[0022] Reference Figure 2 As shown, the first nut 4 is provided with a first external thread 43 and a first internal thread 44, and the second nut 6 is formed with a second internal thread 61. The second internal thread 61 is threadedly connected to the first external thread 43, and the first internal thread 44 is connected to the gas connector. There is a convex ring on the outer side of the first nut 4, and the convex ring is polygonal to facilitate the rotation of the first nut 4.

[0023] A plurality of annular grooves 52 are formed on the connector 5, and an annular protrusion 53 is formed between two adjacent annular grooves 52. The steel sleeve 7 is crimped by a pipe crimping tool, so that the steel sleeve 7 is deformed and tightly pressed against the PE layer 3, thereby clamping the PE layer 3, the metal braided layer 2 and the rubber inner tube between the steel sleeve 7 and the connector 5. The annular grooves 52 and the annular protrusions 53 of the connector 5 make the sealing between the connector 5 and the rubber inner tube 1 better.

[0024] And it can prevent the connector 5 from being pulled out from the rubber hose.

[0025] Reference Figure 2 As shown, the tail end of the second nut 6 is inwardly recessed to form an embedded ring 62, and the embedded ring 62 abuts against the tail end of the steel sleeve 7. After the second nut 6 and the first nut 4 are threadedly connected, the tail end of the steel sleeve 7 abuts against the embedded ring 62, so that the steel sleeve 7 can be clamped between the second nut 6 and the first nut 4, which increases the abutment force between the steel sleeve 7 and the first nut 4, thereby improving the sealing performance;

[0026] On the other hand, the first nut 4 is fixed, which reduces the possibility that the connector 5 together with the first nut 4 is pulled out of the rubber hose.

[0027] The above are only preferred implementations of the utility model. The protection scope of the utility model is not limited to the above embodiments. All technical solutions under the idea of ​​the utility model belong to the protection scope of the utility model. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the utility model should also be regarded as the protection scope of the utility model.

Claims

1. A gas braided metal sheathed hose assembly, characterized in that: The invention comprises a rubber inner tube (1), the rubber inner tube (1) is coated with a metal braided layer (2), the metal braided layer (2) is coated with a PE layer (3), both ends of the rubber inner tube (1) are provided with joints, the joints include a first nut (4), a connector (5) and a second nut (6), both ends of the PE layer (3) are tightly pressed with a steel sleeve (7), the connector (5) passes through the corresponding first nut (4) and extends into the rubber inner tube (1), the second nut (6) is sleeved outside the steel sleeve (7), the tail end of the second nut (6) abuts against the tail end of the steel sleeve (7), and is threadedly connected to the first nut (4).

2. A gas braided metal sheathed hose assembly according to claim 1, characterized in that: A first step (41) is formed inside the first nut (4), and a ring (51) is formed at the end of the connecting head (5), wherein the ring (51) abuts against the first step (41).

3. A gas braided metal sheathed hose assembly according to claim 2, characterized in that: A second step (42) is formed inside the first nut (4), and the second step (42) abuts against the end of the steel sleeve (7).

4. A gas braided metal sheathed hose assembly according to claim 3, characterized in that: A sealing ring is provided between the second step (42) and the steel sleeve (7).

5. A gas braided metal sheathed hose assembly according to claim 2, characterized in that: The first nut (4) is provided with a first external thread (43) and a first internal thread (44), the second nut (6) is formed with a second internal thread (61), the second internal thread (61) is threadedly connected to the first external thread (43), and the first internal thread (44) is connected to a gas connector.

6. A gas braided metal sheathed hose assembly according to claim 1, characterized in that: A plurality of annular grooves (52) are formed on the connector (5), and an annular protrusion (53) is formed between two adjacent annular grooves (52).

7. A gas braided metal sheathed hose assembly according to claim 1, characterized in that: The tail end of the second nut (6) is recessed inwardly to form an embedded ring (62), and the embedded ring (62) abuts against the tail end of the steel sleeve (7).

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