Dual seal flexible waterproof sleeve

Abstract

The utility model discloses double sealing flexible waterproof sleeve, including the flange sleeve of reserving hole in the wall body or the pool wall, the working pipe, the working pipe passes the center through -hole of flange sleeve, and the working pipe is sealed and fixed with flange sleeve through at least two sealing rings, sealing ring and the first end and the second end fixed of sealing ring are fixed respectively with the water -meeting face inner edge of flange sleeve, the water -meeting end outer edge of working pipe. In the utility model, through sealing ring and sealing ring constitute two independent seals, sealing ring provides radial seal, and sealing ring forms more reliable mechanical bite and self -tight seal under water pressure, two seals mutually cooperate, and the risk of single point failure is reduced, even if one seal performance attenuation, another still can effectively prevent leakage, and the sealing property is improved significantly, through sealing ring and sealing ring can compensate the gap caused by the flexible working pipe deformation, and the sealing effect is further improved.

Description

Technical Field

[0001] This utility model relates to the field of waterproof sleeve technology for pipelines in building engineering, and more specifically to a double-sealed flexible waterproof sleeve. Background Technology

[0002] Flexible waterproof sleeves are key waterproof sealing components when pipes pass through building walls, water tanks, basements and other structures. Their function is to allow the pipe to shift due to thermal expansion and contraction or vibration, while effectively preventing external water from seeping in through the gap between the pipe and the wall.

[0003] Currently, common flexible waterproof sleeves mainly use flange glands to axially compress a rubber sealing ring, causing it to undergo radial elastic deformation to fill the annular gap between the sleeve and the pipe, thus achieving a seal. However, this single sealing structure has significant shortcomings: First, when the pipe vibrates or undergoes axial displacement, tiny gaps may form between the sealing ring and the pipe and the inner wall of the sleeve, leading to seal failure; second, this sealing method relies entirely on the elasticity of the sealing ring, and with long-term use, the sealing ring material is prone to aging, wear, or permanent deformation, resulting in decreased sealing reliability and a risk of leakage. Utility Model Content

[0004] The technical problem to be solved by this utility model is how to improve the sealing performance of flexible waterproof sleeves.

[0005] This utility model solves the above-mentioned technical problems through the following technical means: a double-sealed flexible waterproof sleeve, including a flange sleeve and a working pipe pre-embedded in a reserved hole in the wall or pool wall. The working pipe passes through the central through hole of the flange sleeve. The working pipe is sealed and fixed to the flange sleeve by at least two sealing rings. The inner edge of the water-facing side of the flange sleeve and the outer edge of the water-facing end of the working pipe are fixed to the first end and the second end of the sealing ring, respectively, so that a U-shaped cavity is formed inside the sealing ring. The end of the sealing ring on the water-facing side forms an opening.

[0006] As a preferred technical solution, the inner edge of the water-facing side of the flange sleeve is provided with a first U-shaped groove, and the outer edge of the water-facing end of the working pipe is provided with a second U-shaped groove. The first U-shaped groove and the second U-shaped groove are respectively sealed and fixed to the first end and the second end of the sealing ring.

[0007] As a preferred technical solution, the flange cover and the flange sleeve are coaxially arranged and located outside the working pipe. The flange cover is connected and fastened to the flange sleeve by studs, and the flange cover can abut against the sealing ring.

[0008] As a preferred technical solution, an annular baffle is provided between the flange sleeve and the working pipe. The annular baffle is fixedly connected to the flange cover, and a gap is left between the inner ring of the annular baffle and the outer wall of the working pipe and the inner wall of the flange sleeve.

[0009] As a preferred technical solution, one end of the stud is threaded to the flange on the back side of the flange sleeve, and the other end is connected to the end face of the disc section of the flange cover.

[0010] As a preferred technical solution, the flange gland includes a fixedly connected disc section and a boss section. The boss section is fixed at the end of the disc section away from the backwater surface, and the boss section extends into the gap between the flange sleeve and the working pipe, and can abut against the sealing ring.

[0011] As a preferred technical solution, a retaining ring is provided in the gap between the flange sleeve and the working pipe. The outer ring of the retaining ring is fixed to the inner wall of the flange sleeve, and a gap is left between the inner ring of the retaining ring and the outer wall of the working pipe. The sealing ring abuts against the side of the retaining ring facing away from the water, and the sealing ring abuts against the side of the retaining ring facing towards the water.

[0012] As a preferred technical solution, a water-stop ring is welded and fixed to the outer circumferential wall of the flange sleeve, and both the flange sleeve and the water-stop ring are pre-cast into the concrete wall.

[0013] As a preferred technical solution, external water pressure can drive the sealing ring to fit into the working pipe and flange sleeve.

[0014] As a preferred technical solution, the flange sleeve and the working pipe are coaxially arranged.

[0015] The beneficial effects of this utility model are as follows: (1) In this utility model, two independent seals are formed by the sealing ring and the sealing ring. The sealing ring provides radial sealing, and the sealing ring forms a more reliable mechanical engagement and self-tightening seal under water pressure. The two seals work together to reduce the risk of single-point failure. Even if the performance of one seal is reduced, the other can still effectively prevent leakage, which significantly improves the sealing performance. The sealing ring and the sealing ring can compensate for the gap caused by the deformation of the flexible working pipe, which further improves the sealing effect.

[0016] (2) In this utility model, one end of the sealing ring is embedded in the inner edge of the water-facing surface of the flange sleeve, and the other end is embedded in the outer edge of the water-facing end of the working pipe. When the external water pressure increases, the water pressure will act on the U-shaped cavity of the sealing ring, pressing its outer arc surface and inner arc surface more tightly against the flange sleeve and the working pipe, so as to achieve the active sealing effect of "the higher the water pressure, the tighter the seal", which is suitable for high water pressure conditions.

[0017] (3) In this utility model, the static friction generated by the large contact surface of the sealing ring also helps to suppress fretting wear and ensures the sealing stability under dynamic working conditions. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the cross-sectional structure of the double-sealed flexible waterproof sleeve provided in Embodiment 1 of this utility model; Figure 2Provided for Embodiment 1 of this utility model Figure 1 A partially enlarged structural diagram; Reference numerals: 1. Flange sleeve; 11. First U-shaped groove; 2. Working pipe; 21. Second U-shaped groove; 3. Sealing ring; 4. Sealing ring; 5. Flange gland; 6. Stud; 7. Water-stop ring; 8. Annular baffle; 9. Retaining ring; A. Water-facing side; B. Water-returning side. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below in conjunction with the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0020] Example 1 See Figure 1 A double-sealed flexible waterproof sleeve includes a flange sleeve 1, a working pipe 2, a sealing ring 3, a sealing ring 4, a flange gland 5, a stud 6, and a water-stop ring 7. The flange sleeve 1 is embedded in the wall or pool wall. The working pipe 2 passes through the central through hole of the flange sleeve 1. The water-stop ring 7 is welded and fixed to the circumferential outer wall of the flange sleeve 1. In this embodiment, the water-stop ring 7 is welded and fixed to the circumferential outer wall of the flange sleeve 1. The water-facing side A of the flange sleeve 1 is provided with a first sealing part, and the water-repellent side B is provided with a second sealing part. The working pipe 2 is sealed and fixed to the central through hole of the flange sleeve 1 through the first sealing part and the second sealing part. The flange sleeve 1 and the working pipe 2 are coaxially fixed. The first sealing part includes a first U-shaped groove 11 formed on the inner edge of the water-facing side A end of the flange sleeve 1 and a second U-shaped groove 21 formed on the outer periphery of the working pipe 2. A U-shaped rubber sealing ring 3 is provided between the first U-shaped groove 11 and the second U-shaped groove 21. The first end of the sealing ring 3 is fixedly connected to the inner wall of the first U-shaped groove 11, and the second end of the sealing ring 3 is fixedly connected to the inner wall of the second U-shaped groove 21. The middle part of the sealing ring 3 extends toward the gap between the flange sleeve 1 and the working pipe 2, so that the sealing ring 3 forms a U-shaped cavity. The end of the sealing ring 3 located on the water-facing side A forms an opening. It should be noted that in this embodiment, the first end of the sealing ring 3 is embedded in the first U-shaped groove 11, and the second end of the sealing ring 3 is embedded in the second U-shaped groove 21.

[0021] The second sealing part includes at least two sealing rings 4 and a pre-tightening member for pre-tightening the sealing rings 4. In this embodiment, two sealing rings 4 arranged linearly are used as an example. Both sealing rings 4 are located in the gap between the flange sleeve 1 and the working pipe 2, and are set on the back water surface B of the flange sleeve 1. Of course, one or more sealing rings 4 can also be provided, and the number is not limited to this.

[0022] It should be noted that the working pipe 2 is sealed and fixed to the flange sleeve 1 by the sealing ring 4 and the sealing ring 3. The flange cover 5 is provided with a through hole that is compatible with the working pipe 2. The through hole is provided for the working pipe 2 to pass through, and at the same time, the working pipe 2 is limited by the through hole. Of course, it can also be fixedly connected to the working pipe 2 through the through hole.

[0023] The flange cover 5 is coaxially arranged with the flange sleeve 1 and located outside the working pipe 2. The flange cover 5 includes a fixed connecting disc section and a boss section. The boss section is fixed at the end of the disc section away from the back water surface B, and the boss section extends into the gap between the flange sleeve 1 and the working pipe 2. The boss section abuts against the sealing ring 4. The flange cover 5 is connected and fastened to the flange plate on the back water surface B of the flange sleeve 1 by studs 6. Multiple studs 6 are evenly arranged along the disc section direction of the flange cover 5. It should be noted that the sealing ring 4 in this embodiment is an O-ring.

[0024] One end of the stud 6 is threaded to the flange plate on the back water surface B of the flange sleeve 1, and the other end is connected to the end face of the disc section of the flange cover 5. An annular baffle 8 is provided between the flange sleeve 1 and the working pipe 2. The annular baffle 8 is fixedly connected to the flange cover 5. A gap is left between the inner ring of the annular baffle 8 and the outer wall of the working pipe 2 and the inner wall of the flange sleeve 1. The annular baffle 8 is used to expand the force-bearing surface and prevent the boss section of the flange cover 5 from damaging the sealing ring 4.

[0025] Working principle: During installation, the sealing ring 3 is sealed with the first U-shaped groove 11 and the second U-shaped groove 21. The sealing ring 4 is inserted into the gap between the flange sleeve 1 and the working pipe 2. The flange cover 5 is connected and tightened to the flange sleeve 1 by the stud 6. The axial locking force generated by the stud 6 is transmitted to the sealing ring 4 through the flange cover 5 and the annular baffle 8. The sealing ring 4 is compressed and undergoes radial deformation, tightly filling the surrounding gap and forming a second effective sealing barrier. When there is external water pressure, water will seep into and fill the U-shaped cavity of the sealing ring 3. The water pressure from the opening... The sealing ring 3 is squeezed towards the bottom of the U-shaped cavity at the opening, so that it fits tightly against the outer wall of the working pipe 2 and the inner wall of the flange sleeve 1, forming the first effective sealing barrier. When the external water pressure increases, the water pressure will enter the U-shaped cavity and push the U-shaped ring outward from the inside, making its contact force with the contact wall surface greater. The sealing effect is enhanced as the water pressure increases, realizing the effect of automatic enhanced sealing. At the same time, the sealing ring 4 and the sealing ring 3 can compensate for the gap caused by the deformation of the flexible working pipe 2, thereby improving the sealing performance of the flexible waterproof sleeve.

[0026] Example 2 The difference between this embodiment and embodiment 1 is that an annular retaining ring 9 is provided in the gap between the flange sleeve 1 and the working pipe 2. The outer ring of the retaining ring 9 is fixed to the inner wall of the flange sleeve 1. The sealing ring 4 abuts against the side of the retaining ring 9 facing the back water surface B. The sealing ring 3 abuts against the side of the retaining ring 9 facing the front water surface A. A gap is left between the inner ring of the retaining ring 9 and the outer wall of the working pipe 2.

[0027] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A double-sealed flexible waterproof sleeve, characterized in that, It includes a flange sleeve and a working pipe pre-embedded in a reserved hole in the wall or pool wall. The working pipe passes through the central through hole of the flange sleeve. The working pipe is sealed and fixed to the flange sleeve by at least two sealing rings. The inner edge of the water-facing side of the flange sleeve and the outer edge of the water-facing end of the working pipe are fixed to the first and second ends of the sealing ring, respectively, so that a U-shaped cavity is formed inside the sealing ring. The end of the sealing ring on the water-facing side forms an opening.

2. The double-sealed flexible waterproof sleeve according to claim 1, characterized in that, The inner edge of the water-facing side of the flange sleeve is provided with a first U-shaped groove, and the outer edge of the water-facing end of the working pipe is provided with a second U-shaped groove. The first U-shaped groove and the second U-shaped groove are respectively sealed and fixed to the first end and the second end of the sealing ring.

3. The double-sealed flexible waterproof sleeve according to claim 1, characterized in that, The flange cover is coaxially arranged with the flange sleeve and located outside the working pipe. The flange cover is connected and fastened to the flange sleeve by studs, and the flange cover can abut against the sealing ring.

4. The double-sealed flexible waterproof sleeve according to claim 3, characterized in that, An annular baffle is provided between the flange sleeve and the working pipe. The annular baffle is fixedly connected to the flange cover. A gap is left between the inner ring of the annular baffle and the outer wall of the working pipe and the inner wall of the flange sleeve.

5. The double-sealed flexible waterproof sleeve according to claim 4, characterized in that, One end of the stud is threaded to the flange on the back side of the flange sleeve, and the other end is connected to the end face of the disc section of the flange cover.

6. The double-sealed flexible waterproof sleeve according to claim 4, characterized in that, The flange gland includes a fixedly connected disc section and a boss section. The boss section is fixed at the end of the disc section away from the backwater surface, and the boss section extends into the gap between the flange sleeve and the working pipe, and can abut against the sealing ring.

7. The double-sealed flexible waterproof sleeve according to claim 1, characterized in that, A retaining ring is installed in the gap between the flange sleeve and the working pipe. The outer ring of the retaining ring is fixed to the inner wall of the flange sleeve, and a gap is left between the inner ring of the retaining ring and the outer wall of the working pipe. The sealing ring abuts against the side of the retaining ring facing away from the water, and the sealing ring abuts against the side of the retaining ring facing towards the water.

8. The double-sealed flexible waterproof sleeve according to claim 1, characterized in that, A water-stop ring is welded and fixed to the outer circumferential wall of the flange sleeve.

9. The double-sealed flexible waterproof sleeve according to claim 1, characterized in that, External water pressure can drive the sealing ring to fit into the sealing ring, working pipe, and flange sleeve.

10. The double-sealed flexible waterproof sleeve according to claim 1, characterized in that, The flange sleeve and the working pipe are coaxially arranged.

Images