A stainless steel composite pipe structure

Abstract

The utility model discloses a stainless steel composite pipe structure, which is provided with a base pipe, and a sealing liner arranged along the inner wall of the base pipe is arranged at the mouth of the base pipe; the sealing liner is provided with an inner sleeve part that matches the shape of the base pipe and an outward-turned part that hangs at the mouth of the base pipe, and the inner sleeve part that is directly opposite to the outward-turned part is provided with a first sealing groove, and the first sealing groove is arranged in a circle along the inner wall of the base pipe, and the inner sleeve part outside the outward-turned part is provided with a second sealing groove, and both the first sealing groove and the second sealing groove are arc grooves, and O-type sealing rings are installed in the arc grooves. The utility model provides a first sealing groove and an O-type sealing ring on the inner sleeve part that is directly opposite to the outward-turned part, so that even if the outward-turned part is deformed, a good sealing effect can be ensured during the docking process of the composite pipe; by providing an adsorption blind hole, the fit between the base pipe and the sealing liner is improved, thereby ensuring the docking stability of the sealing liner; by providing a limiting part, the square sealing block in the third sealing groove is well fixed.

Description

Technical Field

[0001] The utility model relates to a stainless steel composite pipe, in particular to a stainless steel composite pipe structure. Background Art

[0002] When existing lined stainless steel composite pipes are butt-jointed, sealing rings are usually installed at the joints to improve the sealing of the composite pipe joints. However, the conventional sealing ring structure is prone to movement when the pipes are butt-jointed, or the fit with the inner wall of the composite pipe is poor, resulting in poor sealing of the composite pipe joints. The prior art discloses a structure with application number 202321168248.X and the name of a new stainless steel composite pipe sealing ring. This structure has two problems:

[0003] This structure achieves the sealing of the composite pipe end by arranging a sealing member at the pipe end. During the butt assembly, the bending portion of this end sealing method will deform, thereby affecting the sealing effect of the end sealing member.

[0004] Second, the first sealing member and the second sealing member of the sealing ring body are both square sealing blocks, so that the sealing ring body has a poor fit with the inner wall of the composite pipe. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a stainless steel composite pipe structure with reasonable design, simple structure, good fit and good sealing effect in view of the deficiencies in the prior art.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A stainless steel composite pipe structure is characterized in that a base pipe is provided, and a sealing liner matching the inner wall of the base pipe is installed at the base pipe mouth; the sealing liner is provided with an inner sleeve part fitting the inner wall of the base pipe and an outward-turned part hanging at the base pipe mouth, a first sealing groove is provided on the outer wall of the inner sleeve part facing the outward-turned part, and the first sealing groove is arranged in a circle along the inner wall of the base pipe, a second sealing groove is provided on the outer wall of the inner sleeve part outside the outward-turned part, and the second sealing groove is arranged in a circle along the inner wall of the base pipe, the first sealing groove and the second sealing groove are both arc grooves, and an O-type sealing ring matching the inner wall of the base pipe for sealing is installed in the arc groove.

[0008] The technical problem to be solved by the utility model can also be achieved through the following technical solution: a third sealing groove is provided on the outer wall of the inner sleeve between the first sealing groove and the second sealing groove, the third sealing groove is a square groove, and a square sealing block is installed in the third sealing groove.

[0009] The technical problem to be solved by the utility model can also be achieved through the following technical solution: a plurality of adsorption blind holes are provided on one side of the square sealing block facing the base tube, and the adsorption blind holes are attracted to the inner wall of the base tube.

[0010] The technical problem to be solved by the utility model can also be achieved through the following technical solution: limiting parts for fixing the square sealing block are correspondingly provided on both sides of the notch of the third sealing groove, and the limiting parts are integrally formed with the inner sleeve.

[0011] Compared with the prior art, the utility model provides a first sealing groove and an O-ring on the inner sleeve part facing the everted part, so that even if the everted part is deformed, a good sealing effect can be ensured during the jointing of the composite pipe; the adsorption blind hole is provided to improve the fit between the base pipe and the sealing liner, thereby ensuring the jointing stability of the sealing liner; and the limiting part is provided to fix the square sealing block in the third sealing groove well. The stainless steel composite pipe structure of the utility model is simple in structure, easy to use, and has a good sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a structural diagram of the stainless steel composite pipe structure described in the utility model.

[0013] In the figure: 1-base pipe, 2-sealing liner, 3-outward turning part, 4-first sealing groove, 5-inner sleeve part, 6-third sealing groove, 7-second sealing groove, 8-adsorption blind hole, 9-limiting part. DETAILED DESCRIPTION

[0014] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0015] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0016] Reference Figure 1A stainless steel composite pipe structure is provided with a base pipe 1, a sealing liner 2 matching the inner wall of the base pipe is installed at the pipe mouth of the base pipe 1, and the sealing liner 2 is an elastic liner, such as a rubber liner; the sealing liner 2 is provided with an inner sleeve 5 matching the inner wall of the base pipe 1 and an outward-turned portion 3 hung at the pipe mouth of the base pipe, a first sealing groove 4 is provided on the outer wall of the inner sleeve 5 facing the outward-turned portion 3, and the first sealing groove is provided with a circle along the inner wall of the base pipe, a second sealing groove 7 is provided on the outer wall of the inner sleeve outside the outward-turned portion 3, and the second sealing groove is provided with a circle along the inner wall of the base pipe, the first sealing groove 4 and the second sealing groove 7 are both arc grooves, and an O-type sealing ring that seals with the inner wall of the base pipe is placed in the arc groove, and the O-type sealing ring is provided with a circle along the inner wall of the base pipe.

[0017] A third sealing groove 6 is provided on the outer wall of the inner sleeve between the first sealing groove 4 and the second sealing groove 7. The third sealing groove 6 is a square groove. A square sealing block is installed in the third sealing groove 6. The inner sleeve 5, the outward turning part 3 and the first sealing groove 4, the second sealing groove 7 and the third sealing groove 6 of the sealing liner are integrally formed; a plurality of adsorption blind holes 8 are provided on a side of the square sealing block facing the base tube, and the adsorption blind holes 8 are attracted to the inner wall of the base tube 1.

[0018] Limiting parts 9 for fixing the square sealing block are correspondingly arranged on both sides of the notch of the third sealing groove, and the adsorption blind hole 8 is arranged between the limiting parts 9 on both sides.

[0019] During assembly, the sealing liner 2 is inserted from the mouth of the base pipe 1 until the outward-turned portion 3 is against the end of the mouth of the base pipe 1, and then the base pipe 1 and the sealing liner 2 are fully fitted together under the action of the upper and lower pressing wheels of the groove pressing machine. Since the first sealing groove 4 and the second sealing groove 7 are both arc-shaped grooves, during the operation of the groove pressing machine, the first sealing groove 4 and the second sealing groove 7 are fitted with the inner wall of the base pipe while exhausting and sealing. Similarly, the square sealing block in the third sealing groove 6 is tightly fitted with the inner wall of the base pipe 1 through the adsorption blind hole 8. Even during the jointing process of the composite pipe, the sealing liner will not move, thereby ensuring a good sealing effect.

[0020] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A stainless steel composite pipe structure, characterized in that: A base pipe is provided, and a sealing liner matched with the inner wall of the base pipe is installed at the base pipe mouth; the sealing liner is provided with an inner sleeve part fitted with the inner wall of the base pipe and an outward-turned part hung at the base pipe mouth, a first sealing groove is provided on the outer wall of the inner sleeve part facing the outward-turned part, the first sealing groove is arranged in a circle along the inner wall of the base pipe, a second sealing groove is provided on the outer wall of the inner sleeve part outside the outward-turned part, the second sealing groove is arranged in a circle along the inner wall of the base pipe, both the first sealing groove and the second sealing groove are arc grooves, and an O-ring sealing ring matching and sealing with the inner wall of the base pipe is installed in the arc groove.

2. A stainless steel composite pipe structure according to claim 1, characterized in that: A third sealing groove is arranged on the outer wall of the inner sleeve between the first sealing groove and the second sealing groove. The third sealing groove is a square groove, and a square sealing block is installed in the third sealing groove.

3. A stainless steel composite pipe structure according to claim 2, characterized in that: A plurality of adsorption blind holes are arranged on one side of the square sealing block facing the base tube. The adsorption blind holes are arranged in a cone shape and are attracted to the inner wall of the base tube.

4. A stainless steel composite pipe structure according to claim 2, characterized in that: Limiting parts for fixing the square sealing block are correspondingly provided on both sides of the notch of the third sealing groove.

5. A stainless steel composite pipe structure according to any one of claims 1 to 4, characterized in that: The sealing liner is an elastic liner.

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