Spring tube structure

Abstract

This invention provides a spring tube structure. The invention includes a connector, a tube body, a protective spring, and a metal protective sleeve. The connector has an extension tube for insertion into the tube body, and a connecting step is provided between the extension tube and the connector. The end of the tube body abuts against the connecting step. The metal protective sleeve is fitted onto the outside of the tube body and threaded onto the connecting step. A connecting groove is provided on the outer wall of the extension tube, and a connecting protrusion is provided on the inner wall of the metal protective sleeve. The protective spring is fitted onto the outside of the metal protective sleeve and the outside of the tube body, with its end abutting against the connector. Each connecting component can be processed independently, eliminating the need for secondary processing after sleeve installation, effectively reducing processing difficulty; the overall connection stability is also significantly enhanced. A high-temperature resistant layer and a corrosion-resistant layer can also be applied to the side wall of the tube body, and corrosion-resistant treatment can also be applied to the connector, protective spring, and connecting sleeve.

Description

Technical Field

[0001] This utility model relates to connecting pipes, and more particularly, to a spring tube structure. Background Technology

[0002] Existing spring tube structures, such as the Chinese utility model patent with authorization announcement number CN218522148U, describe a high-pressure exterior wall spraying pipe structure. Its main structure includes a connector, a pipe body, and a metal protective sleeve. The metal protective sleeve is fitted over the outside of the pipe body, and the end of the metal protective sleeve near the connector is bent inward to form a rolled edge, which wraps around the end of the pipe body. When the connector is inserted into the pipe body, the connector is threaded onto the rolled edge. In addition, a protective spring is installed on the outside of the metal protective sleeve and the pipe body.

[0003] Although the above-mentioned tube structure has been improved, it has been found in actual use that the connection is not very strong because the contact area between the rolled edge and the tube body is limited, and the connection force is only generated by the squeezing force when the connector is screwed in. To further improve this situation, some manufacturers will first put the metal protective sleeve on the tube body during actual production, and then roll the metal protective sleeve. The rolled edge first generates a clamping force on the tube body. In this way, the connection strength is increased, but the overall processing difficulty is also increased. Utility Model Content

[0004] In view of this, the purpose of this utility model is to provide a spring tube structure that not only improves the connection strength but also effectively reduces the overall processing difficulty.

[0005] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows: A spring tube structure includes a connector, a tube body, a protective spring, and a metal protective sleeve. The connector is provided with an extension tube for insertion into the tube body. A connecting step is provided between the extension tube and the connector, and the end of the tube body abuts against the connecting step. The metal protective sleeve is fitted onto the outside of the tube body, and the metal protective sleeve is threaded onto the connecting step. The outer wall of the extension tube is provided with a connecting groove, and the inner wall of the metal protective sleeve is provided with a connecting protrusion. The protective spring is sleeved on the outside of the metal protective sleeve and the outside of the tube body, and the end of the protective spring is abutted and connected to the connector.

[0006] With the above technical solution, during actual installation, the metal protective sleeve is first placed on the outside of the tube body, then the extension tube is inserted into the inside of the tube body end, and then the metal protective sleeve is gradually pushed towards the tube body end position. The end of the metal protective sleeve is threaded onto the connecting step, realizing the connection of the entire spring tube. After installation, the tube body end is clamped between the metal protective sleeve and the extension tube, and the inner tube wall is embedded in the connecting groove, and the connecting protrusion is also embedded in the outer tube wall of the tube body. With the above structural form, each connecting component can be processed independently without secondary processing after sleeve, effectively reducing the processing difficulty; the overall connection stability is also significantly enhanced.

[0007] Preferably, the connecting step includes a first step surface and a second step surface, the first step surface faces the extension tube side, the second step surface is adjacent to the first step surface, the end of the tube body abuts against the first step surface, and the metal protective sleeve is threadedly connected to the second step surface.

[0008] Through the above technical solutions, the connecting step provides an effective and stable contact position at the end of the pipe body, improving the connection stability between the pipe body and the connector; at the same time, the connecting step also provides a threaded connection position for the metal protective sleeve, improving the connection stability between the metal protective sleeve and the connector; the above two structures make full use of the structural characteristics of the connecting step, resulting in a high degree of structural compactness.

[0009] Preferably, after the metal protective sleeve is connected to the connecting step, the connecting protrusion is opposite to the connecting groove.

[0010] Through the above technical solution, the connecting protrusion will squeeze the side wall of the tube towards the connecting groove, which can further improve the connection stability between the tube, the metal protective sleeve and the extension tube.

[0011] Preferably, the connecting protrusion is an annular protrusion, the connecting groove is an annular groove, and there are three connecting protrusions and three connecting grooves. The protrusion height of the three connecting protrusions relative to the inner wall of the metal protective sleeve gradually increases along the side away from the connecting step.

[0012] The above technical solution firstly employs a structure with three connecting protrusions and three connecting grooves, resulting in at least three deformation points on the tube body, further enhancing the connection stability between the tube body, the metal protective sleeve, and the extension tube. Secondly, during the process of gradually inserting the metal protective tube into the connector, the connecting protrusion with the lowest protrusion height contacts the tube body first, and then gradually contacts the connecting protrusions with progressively increasing protrusion height, significantly improving the smoothness of the connection.

[0013] Preferably, the end of the metal protective sleeve away from the connecting step is flush with the end of the extension tube away from the connector.

[0014] The above technical solution maximizes the relative area between the metal protective sleeve and the extension tube, thereby further improving the connection stability between the tube body, the metal protective sleeve, and the extension tube.

[0015] Preferably, it also includes a connecting sleeve with internal threads, the connecting head is provided with an external flange, the connecting sleeve abuts against the external flange, and a rubber sealing gasket is provided inside the connecting sleeve.

[0016] The above technical solution adopts a split design between the connecting sleeve and the connecting head, which not only facilitates disassembly and transportation, but also facilitates the processing of each component.

[0017] Preferably, a locking spring is fitted onto the second step surface, and the spring force of the locking spring acts on the metal protective sleeve.

[0018] With the above technical solution, after the metal protective sleeve is threadedly connected to the connecting step, the locking spring force can be applied to the metal protective sleeve, and the thread engagement tightness between the metal protective sleeve and the connecting step is further enhanced, making it less likely to accidentally fall off. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of an embodiment; Figure 2 This is a partial cross-sectional structural diagram of an embodiment; Figure 3 for Figure 2 Enlarged view of part A; Figure 4 for Figure 2 Enlarged view of part B.

[0020] Reference numerals: 1. Connector; 2. Tube body; 3. Protective spring; 4. Metal protective sleeve; 5. Extension tube; 6. Connecting step; 61. First step surface; 62. Second step surface; 7. Connecting groove; 8. Connecting protrusion; 9. Connecting sleeve; 10. Outer flange; 11. Rubber sealing gasket; 12. Locking spring. Detailed Implementation

[0021] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, so that the technical solution of this utility model can be more easily understood and mastered.

[0022] A spring tube structure, see Figure 1 The middle part is provided with a pipe body 2, which is usually a deformable water pipe. Connectors are provided at the upper and / or lower ends of the pipe body 2 to facilitate connection with other pipe fittings.

[0023] The aforementioned connector includes connector 1, see [link / reference]. Figures 2-4The connector 1 is provided with an extension tube 5 for insertion into the tube body 2. A connecting step 6 is provided between the extension tube 5 and the connector 1. The connecting step 6 includes a first step surface 61 and a second step surface 62. The first step surface 61 faces the extension tube 5, and the second step surface 62 is adjacent to the first step surface 61. The end of the tube body 2 abuts against the first step surface 61.

[0024] A metal protective sleeve 4 is fitted on the outside of the tube body 2, and the metal protective sleeve 4 is threaded to the second step surface 62.

[0025] The outer wall of the extension tube 5 is provided with a connecting groove 7, and the inner wall of the metal protective sleeve 4 is provided with a connecting protrusion 8.

[0026] The connecting protrusion 8 is an annular protrusion, and the connecting groove 7 is an annular groove. There are three of each connecting protrusion 8 and connecting groove 7. The height of the three connecting protrusions 8 relative to the inner wall of the metal protective sleeve 4 gradually increases along the side away from the connecting step 6.

[0027] See appendix Figure 3 After the metal protective sleeve 4 is connected to the connecting step 6, the connecting protrusion 8 and the connecting groove 7 are opposite each other, that is, the connecting protrusion 8 will squeeze the corresponding tube body 2 into the connecting groove 7.

[0028] A locking spring 12 is fitted on the second step surface 62, and the spring force of the locking spring 12 acts on the metal protective sleeve 4.

[0029] It also includes a connecting sleeve 9 with internal threads, the connector 1 having an outer flange 10, the connecting sleeve 9 abutting against the outer flange 10, and a rubber sealing gasket 11 inside the connecting sleeve 9.

[0030] The end of the metal protective sleeve 4 facing away from the connecting step 6 is flush with the end of the extension tube 5 facing away from the connector 1.

[0031] A protective spring 3 is also provided, which is sleeved on the outside of the metal protective sleeve 4 and the outside of the tube body 2, and the end of the protective spring 3 is connected to the connector 1.

[0032] To further improve the high temperature resistance and corrosion resistance of the spring tube, a high temperature resistant layer and a corrosion resistant layer can be applied to the side wall of the tube body 2. Of course, corrosion resistant treatment can also be applied to the connector 1, the protective spring 3, and the connecting sleeve 9.

[0033] Actual installation process: First, put the metal protective sleeve 4 and the protective spring 3 on the outside of the tube body 2. The protective spring 3 is located outside the metal protective sleeve 4. The locking spring 12 is put on the first step surface 61 of the connecting step 6 of the connector 1. Insert the extension tube 5 into the inside of the end of the tube body 2. Then, push the metal protective sleeve 4 gradually to the end of the tube body 2. The end of the metal protective sleeve 4 abuts against the locking spring 12. The end of the metal protective sleeve 4 is threadedly connected to the connecting step 6.

[0034] Of course, the above are just typical examples of this utility model. In addition, this utility model may have many other specific implementation methods. All technical solutions formed by equivalent substitution or equivalent transformation fall within the scope of protection claimed by this utility model.

Claims

1. A spring tube structure, comprising a connector (1), a tube body (2), a protective spring (3), and a metal protective sleeve (4), characterized in that: The connector (1) is provided with an extension tube (5) for insertion into the tube body (2), and a connecting step (6) is provided between the extension tube (5) and the connector (1), with the end of the tube body (2) abutting against the connecting step (6); The metal protective sleeve (4) is sleeved on the outside of the tube body (2), the metal protective sleeve (4) is threaded to the connecting step (6), the outer wall of the extension tube (5) is provided with a connecting groove (7), and the inner wall of the metal protective sleeve (4) is provided with a connecting protrusion (8). The protective spring (3) is sleeved on the outside of the metal protective sleeve (4) and the outside of the tube body (2), and the end of the protective spring (3) abuts against the connector (1).

2. The spring tube structure according to claim 1, characterized in that: The connecting step (6) includes a first step surface (61) and a second step surface (62). The first step surface (61) faces the extension tube (5) and the second step surface (62) is adjacent to the first step surface (61). The end of the tube body (2) abuts against the first step surface (61) and the metal protective sleeve (4) is threaded to the second step surface (62).

3. The spring tube structure according to claim 2, characterized in that: After the metal protective sleeve (4) is connected to the connecting step (6), the connecting protrusion (8) is opposite to the connecting groove (7).

4. The spring tube structure according to claim 3, characterized in that: The connecting protrusion (8) is an annular protrusion, and the connecting groove (7) is an annular groove. There are three connecting protrusions (8) and three connecting grooves (7). The protrusion height of the three connecting protrusions (8) relative to the inner wall of the metal protective sleeve (4) gradually increases along the side away from the connecting step (6).

5. A spring tube structure according to any one of claims 1-4, characterized in that: The end of the metal protective sleeve (4) away from the connecting step (6) is flush with the end of the extension tube (5) away from the connector (1).

6. A spring tube structure according to any one of claims 1-4, characterized in that: It also includes a connecting sleeve (9) with internal threads, the connector (1) is provided with an outer flange (10), the connecting sleeve (9) abuts against the outer flange (10), and a rubber sealing gasket (11) is provided inside the connecting sleeve (9).

7. A spring tube structure according to any one of claims 2-4, characterized in that: A locking spring (12) is fitted on the second step surface (62), and the locking spring (12) acts on the metal protective sleeve (4) with its elastic force.

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