Eccentric reducing pipe

Abstract

The eccentric reducing pipe comprises a pipe body, the pipe body comprises a small-diameter part, a large-diameter part and a reducing part located between the small-diameter part and the large-diameter part, a vibration reduction inner sleeve is arranged at the position, corresponding to the orthographic projection of the end face of the large-diameter part and the orthographic projection of the end face of the small-diameter part, of the inner wall of the reducing part in a sliding mode, and a T-shaped installation groove is formed in the inner wall of the pipe body. A linkage piece is fixedly arranged on the vibration reduction inner sleeve, the T-shaped mounting groove comprises a vibration reduction section allowing the linkage piece to slide and an entering section allowing the linkage piece to slide into the vibration reduction section, and a vibration reduction structure is arranged in the vibration reduction section. The vibration reduction structure comprises two abutting blocks, a limiting area and a vibration reduction spring, the limiting area is located between the two abutting blocks and used for limiting the linkage piece, the vibration reduction spring is connected with the abutting blocks to make reciprocating motion in the axial direction of the length of the pipe body, and a vibration reduction gap is formed between the vibration reduction inner sleeve and the reducing part. And resonance generated by the eccentric reducing pipe at the reducing part is slowed down, and the service life of the eccentric reducing pipe is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of pipe fittings, and particularly relates to an eccentric reducing pipe. Background Art

[0002] A reducing pipe, also known as a reducer, is one of the chemical pipe fittings and is used for connecting two different pipe diameters. It is further divided into a concentric reducer and an eccentric reducer. The eccentric reducing pipe is a pipe fitting used at the pipe diameter change.

[0003] The existing eccentric reducing pipe includes a pipe body. The pipe body includes a large-diameter part, a small-diameter part, and a reducing part provided between the large-diameter part and the small-diameter part. When the fluid in the pipeline flows from the large-diameter part of the pipeline with a larger diameter through the reducing part into the small-diameter part of the pipeline with a smaller diameter, the pressure and flow velocity of the fluid in the reducing part will increase accordingly, and the resistance at this position will also gradually increase, thereby impacting the inner wall of the reducing part. If this continues for a long time, it is easy to cause the reducing part of the eccentric reducing pipe to deform and generate resonance, thereby affecting the service life of the pipe fitting. In summary, an eccentric reducing pipe is proposed to solve the above problems. Content of the Utility Model

[0004] The purpose of the utility model is to provide an eccentric reducing pipe, which can absorb the impact force, slow down the resonance generated in the reducing part of the eccentric reducing pipe, and extend the service life of the eccentric reducing pipe.

[0005] The above technical purpose of the utility model is achieved through the following technical solutions: An eccentric reducing pipe includes a pipe body. The pipe body includes a small-diameter part, a large-diameter part, and a reducing part located between the small-diameter part and the large-diameter part. The characteristic is that a damping inner sleeve is slidably arranged at a position on the inner wall of the reducing part corresponding to the orthographic projection of the end faces of the large-diameter part and the small-diameter part. A T-shaped installation groove is formed on the inner wall of the pipe body. The damping inner sleeve is fixedly provided with a linkage member. The T-shaped installation groove includes a damping section for the linkage member to slide and an entry section for the linkage member to slide into the damping section. A damping structure is arranged in the damping section. The damping structure includes two abutting blocks, a limiting area formed between the two abutting blocks for limiting the linkage member, and a damping spring connecting the abutting blocks and configured to reciprocate along the axial direction of the pipe body length. A damping gap is formed between the damping inner sleeve and the reducing part.

[0006] By adopting the above technical solutions, after the fluid enters the pipeline through the large-diameter part, the fluid impacts the inner wall of the damping inner sleeve. Through the setting of the damping spring, the damping inner sleeve will drive the damping spring in the damping section to reciprocate along the axial direction of the pipe body length, playing a role in slowing down the resonance generated by the fluid, thereby reducing the impact pressure of the fluid on the reducing pipe and extending the service life of the eccentric reducing pipe; through the setting of the T-shaped installation groove, it is convenient for the installation of the linkage member.

[0007] Further set as: the damping inner sleeve includes a small-diameter section and a large-diameter section, and the T-shaped installation groove and the linkage member are both arranged between the corresponding small-diameter section and the small-diameter part, and between the large-diameter part and the large-diameter part.

[0008] By adopting the above technical solution, the T-shaped installation groove and the linkage member are both arranged between the corresponding small-diameter section and the small-diameter part, and between the large-diameter part and the large-diameter part, improving the installation stability of the damping inner sleeve

[0009] Further set as: an entrance opening for the linkage member to enter the entrance section is provided on the entrance section, and the axis of the installation path of the linkage member in the entrance section is collinear with the rotation axis of the small-diameter section.

[0010] By adopting the above technical solution, it is convenient for the linkage member to be installed into the entrance section through the entrance opening. The setting that the axis of the installation path of the linkage member in the entrance section is collinear with the rotation axis of the small-diameter section facilitates the adaptation of the small-diameter section and the small-diameter part, and is convenient for the installation of the linkage member in the entrance section.

[0011] Further set as: in the limiting area, a limiting protrusion is provided on one side of the two abutting blocks facing each other, and a limiting groove adapted to the limiting protrusion is provided on the abutting block facing the limiting protrusion.

[0012] By adopting the above technical solution, through the setting of the limiting protrusion, the limiting protrusion is adapted to the limiting groove, so that the linkage member is restricted in the limiting area, preventing accidental detachment from the limiting area, thereby causing damping failure.

[0013] Further set as: a drainage ring is snap-fitted on the inner wall of the large-diameter part, and the inner ring of the drainage ring is gradually provided with a drainage surface that tapers towards the reduced-diameter part.

[0014] By adopting the above technical solution, the drainage surface of the drainage ring can guide the fluid into the damping inner sleeve, reducing the impact of the fluid entering the damping gap on the reduced-diameter part and prolonging the eccentricity.

[0015] Further set as: a wear-resistant layer is provided on the inner surface of the damping inner sleeve.

[0016] By adopting the above technical solution, a wear-resistant layer is strengthened on the inner surface of the damping inner sleeve by the hard chromium plating process to ensure the long-term use of the damping inner sleeve. Description of the Drawings

[0017] Figure 1 It is a partial structural cross-sectional view of this embodiment;

[0018] Figure 2 It is an enlarged schematic view of part A of the embodiment;

[0019] Figure 3 It is an overall structural cross-sectional view of the embodiment;

[0020] Figure 4 Schematic enlarged view of Example B

[0021] In the figure: 1, small-diameter part; 11, large-diameter part; 12, diameter-changing part; 2, damping inner sleeve; 21, T-shaped installation groove; 22, linkage part; 23, damping section; 24, entry section; 25, abutting block; 26, limiting area; 27, damping spring; 28, damping gap; 31, small-diameter section; 32, large-diameter section; 41, entry port; 42, limiting protrusion; 43, limiting groove; 51, drainage ring; 52, drainage surface; 61, wear-resistant layer. Specific embodiments

[0022] The following further describes the present utility model in detail with reference to the accompanying drawings.

[0023] Refer to Figures 1 to 4 , an eccentric reducing pipe, comprising a pipe body, the pipe body includes a small-diameter part 1, a large-diameter part 11 and a diameter-changing part 12 located between the small-diameter part 1 and the large-diameter part 11. The small-diameter part 1, the large-diameter part 11 and the diameter-changing part 12 are integrally formed. A damping inner sleeve 2 is slidably arranged on the inner wall of the diameter-changing part 12 corresponding to the positions of the end-face orthographic projections of the large-diameter part 11 and the small-diameter part 1. The specific material of the damping inner sleeve 2 is rubber. A T-shaped installation groove 21 is provided on the inner wall of the pipe body. The damping inner sleeve 2 is fixedly provided with a linkage part 22. The T-shaped installation groove 21 includes a damping section 23 for the linkage part 22 to slide and an entry section 24 for the linkage part 22 to slide into the damping section 23. A damping structure is arranged in the damping section 23. The damping structure includes two abutting blocks 25, a limiting area 26 formed between the two abutting blocks 25 for limiting the linkage part 22 and a damping spring 27 connecting the abutting blocks 25 and configured to reciprocate along the longitudinal axis of the pipe body. A damping gap 28 is formed between the damping inner sleeve 2 and the diameter-changing part 12.

[0024] The damping inner sleeve 2 includes a small-diameter section 31 and a large-diameter section 32. The T-shaped installation groove 21 and the linkage part 22 are both arranged between the corresponding small-diameter section 31 and the small-diameter part 1 and between the large-diameter part 11 and the large-diameter part 11. The entry section 24 is provided with an entry port 41 for the linkage part 22 to enter the entry section 24. The installation path axis of the linkage part 22 in the entry section 24 is collinear with the rotation axis of the small-diameter section 31.

[0025] The limiting area 26 includes a limiting protrusion 42 fixedly arranged on one side of the two abutting blocks 25 facing each other and a limiting groove 43 opened on the abutting block 25 opposite to and adapted to the limiting protrusion 42. A drainage ring 51 is clamped on the inner wall of the large-diameter part 11. The specific material of the drainage ring 51 is plastic. The inner ring of the drainage ring 51 is gradually tapered towards the diameter-changing part 12 and provided with a drainage surface 52. A wear-resistant layer 61 is arranged on the inner surface of the damping inner sleeve 2. The wear-resistant layer 61 is electroplated by a hard chromium plating process.

[0026] This specific embodiment is only an interpretation of the present utility model, and it is not a limitation to the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment that do not contribute creatively as needed, but as long as it is within the scope of the claims of the present utility model, it is protected by the patent law.

Claims

1. An eccentric reducer, comprising a pipe body, the pipe body including a small-diameter portion (1), a large-diameter portion (11), and a diameter-changing portion (12) located between the small-diameter portion (1) and the large-diameter portion (11), characterized in that: A vibration damping inner sleeve (2) is slidably arranged on the inner wall of the variable diameter part (12) corresponding to the positions of the orthographic projections of the large diameter part (11) and the end face of the small diameter part (1). A T-shaped installation groove (21) is formed in the inner wall of the pipe body. A linkage member (22) is fixedly arranged on the vibration damping inner sleeve (2). The T-shaped installation groove (21) includes a damping section (23) for the linkage member (22) to slide and an entry section (24) for the linkage member (22) to slide into the damping section (23). A damping structure is arranged in the damping section (23). The damping structure includes two abutting blocks (25), a limiting area (26) formed between the two abutting blocks (25) for limiting the linkage member (22), and a damping spring (27) connecting the abutting blocks (25) and configured to reciprocate along the axial direction of the pipe body. A damping gap (28) is formed between the vibration damping inner sleeve (2) and the variable diameter part (12).

2. The eccentric reducer according to claim 1, wherein: The vibration damping inner sleeve (2) includes a small diameter section (31) and a large diameter section (32). The T-shaped installation groove (21) and the linkage member (22) are both arranged between the corresponding small diameter section (31) and the small diameter part (1) and between the large diameter part (11) and the large diameter part (11).

3. The eccentric reducer according to claim 1, characterized in that: An entry port (41) for the linkage member (22) to enter the entry section (24) is formed in the entry section (24). The axis of the installation path of the linkage member (22) in the entry section (24) is collinear with the axis of rotation of the small diameter section (31).

4. The eccentric reducer according to claim 1, wherein: The limiting area includes a limiting protrusion (42) arranged on one side of the two abutting blocks (25) facing each other and a limiting groove (43) formed in the abutting block (25) opposite to and adapted to the limiting protrusion (42).

5. The eccentric reducer according to claim 1, characterized in that: A drainage ring (51) is snap-fitted on the inner wall of the large diameter part (11). The inner ring of the drainage ring (51) is gradually provided with a drainage surface (52) that tapers towards the variable diameter part (12).

6. The eccentric reducer according to claim 1, wherein: A wear-resistant layer (61) is arranged on the inner surface of the vibration damping inner sleeve (2).

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