Sealing device for pipeline penetrating well wall
By using a dual sealing structure of polyurethane foam and expanding waterproof mortar at the point where the pipe penetrates the well wall, the problem of easy aging and cracking of the sealing material in the existing technology is solved, achieving efficient sealing, simplified construction, and strong adaptability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 新疆心连心能源化工有限公司
- Filing Date
- 2025-06-05
- Publication Date
- 2026-04-14
AI Technical Summary
In existing technologies, the sealing materials used at the pipe penetration points are prone to aging (such as hemp oil) and cracking (such as cement mortar), resulting in poor sealing. Furthermore, these materials are difficult to install, maintain, and adapt to various conditions, and are prone to leakage, especially in high-temperature and oily environments.
Polyurethane foam and expanding waterproof mortar are used as alternative materials to fill the annular cavity between the waterproof sleeve and the pipe body, respectively, and a waterproof mortar layer and annular waterstop are fixed on the outside to form a double sealing structure.
It achieves efficient sealing, reduces the risk of leakage, avoids uneven settlement of pipelines or inspection wells, simplifies construction, and improves the adaptability and durability of materials.
Smart Images
Figure CN224120791U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of pipe sealing technology in water supply and drainage pipe networks, and is a pipe penetration well wall sealing device. Background Technology
[0002] According to the current national building standard design atlas 05S502 "Outdoor Water Supply Pipeline Ancillary Structures", page 86 "Detailed Description of Pipeline Penetration Through Well Wall" shows that the existing sealing method for pipe penetration through well wall is as follows: a waterproof sleeve is pre-embedded in the well wall, and after the pipe passes through the waterproof sleeve according to the design diameter and elevation, the space between the pipe and the waterproof sleeve is filled with hemp oil, and the outer surface of the hemp oil that comes into contact with the soil or the medium inside the pipe is sealed with 20mm thick 1:2 cement mortar.
[0003] The gap between the pipe and the casing varies from approximately 30 to 60 mm depending on the pipe diameter. After the pipe penetrates the well wall according to the required location and diameter, the gap between the pipe and the waterproof casing embedded in the well wall is sealed with hemp fiber. A 20 mm thick layer of hemp fiber is left on the surface of the hemp fiber and then sealed with 1:2 cement mortar. Cement mortar is prone to cracking due to temperature and corrosive media, which can cause the hemp fiber to age and soften. Ultimately, this can lead to poor sealing at the pipe penetration point, resulting in leakage and uneven settlement of the inspection well or pipe.
[0004] Oiled hemp used in engineering is an engineering material made from a mixture of hemp fibers and materials such as asphalt. Using oiled hemp mixed with cement mortar for sealing pipe joints has the following disadvantages:
[0005] (1) Under high temperature conditions, hemp is prone to aging, and cement mortar will crack or fall off, requiring regular repairs to maintain its sealing effect. However, the work site is located in the underground pipeline network, with one side buried by backfill and the other side inside the inspection well, so regular maintenance is difficult to achieve.
[0006] (2) Oil hemp needs to be compacted in layers and fully bonded with cement mortar. If the filling density is insufficient or the mortar is not properly cured, leakage is likely to occur, which requires a professional construction team.
[0007] (3) Poor adaptability to oily or organic solvent-containing media, resulting in softening of oil and hemp and cracking of cement mortar due to impact. Summary of the Invention
[0008] This utility model provides a pipe penetration well wall sealing device that overcomes the shortcomings of the prior art. It can effectively solve the problems of poor sealing effect, easy leakage and cement mortar cracking due to impact when used for pipe joint sealing with existing hemp and cement mortar.
[0009] The technical solution of this utility model is achieved through the following measures: a pipe penetration well wall sealing device, including a pipe body and a waterproof sleeve, the waterproof sleeve is located outside the pipe body, an annular cavity is formed between the waterproof sleeve and the pipe body, the annular cavity is filled with expanding foam, and waterproof mortar layers are fixed at the annular cavity between the left end and the right end of the waterproof sleeve and the pipe body, respectively.
[0010] The following are further optimizations and / or improvements to the above-mentioned utility model technical solution:
[0011] The aforementioned waterproof mortar layers are fixed to the left and right ends of the expanding foam, and the outer surface of the waterproof mortar layer is flush with the left and right ends of the waterproof sleeve.
[0012] The above-mentioned waterproof sleeve is fixed with concrete on the outside, and an annular waterstop is fixedly connected inside the concrete. The annular waterstop is fitted onto the waterproof sleeve.
[0013] The aforementioned foam is polyurethane foam.
[0014] The above-mentioned waterproof mortar layer is an expanding waterproof mortar.
[0015] This utility model has a reasonable and compact structure and is easy to use. It achieves the purpose of sealing by filling the annular cavity formed between the waterproof sleeve and the pipe body with expanding foam, and fixing waterproof mortar layers at the annular cavities between the left and right ends of the waterproof sleeve and the pipe body. It is safe, reliable, has a good sealing effect and strong applicability, and prevents uneven settlement of pipes or inspection wells due to leakage, greatly reducing the dependence on the process and the difficulty of construction. Attached Figure Description
[0016] Appendix Figure 1 This is a schematic diagram of the front cross-sectional structure of the preferred embodiment of the present invention.
[0017] The codes in the attached diagram are as follows: 1 is the pipe body, 2 is the waterproof sleeve, 3 is the expanding foam, 4 is the waterproof mortar layer, 5 is the concrete, and 6 is the annular waterstop. Detailed Implementation
[0018] This utility model is not limited to the following embodiments, and the specific implementation method can be determined according to the technical solution of this utility model and the actual situation.
[0019] In this utility model, for ease of description, the description of the relative positions of the components is based on the appendix to the specification. Figure 1 The layout is described using a diagrammatic method, such as the positional relationships of front, back, top, bottom, left, and right, which are based on the instructions attached. Figure 1 The orientation of the layout is determined by the direction of the map.
[0020] The present invention will be further described below with reference to the embodiments and accompanying drawings:
[0021] As attached Figure 1 As shown, the pipe penetration sealing device includes a pipe body 1 and a waterproof sleeve 2. The waterproof sleeve 2 is located outside the pipe body 1, forming an annular cavity between the waterproof sleeve 2 and the pipe body 1. Expanding foam 3 is filled within the annular cavity. Waterproof mortar layers 4 are fixed at the annular cavities between the left and right ends of the waterproof sleeve 2 and the pipe body 1, respectively. Thus, by filling the annular cavity formed between the waterproof sleeve 2 and the pipe body 1 with expanding foam 3, and fixing the waterproof mortar layers 4 at the annular cavities between the left and right ends of the waterproof sleeve 2 and the pipe body 1, a seal is achieved. This device is safe, reliable, has a good sealing effect, and is highly applicable. It prevents uneven settlement of the pipe or inspection well due to leakage, greatly reducing process dependence and construction difficulty.
[0022] The above-mentioned pipeline penetration sealing device can be further optimized and / or improved according to actual needs:
[0023] As attached Figure 1 As shown, the waterproof mortar layer 4 is fixed to the left and right ends of the expanding foam 3, and the outer surface of the waterproof mortar layer 4 is flush with the left and right ends of the waterproof sleeve 2.
[0024] As attached Figure 1 As shown, a concrete 5 is fixed to the outside of the waterproof sleeve 2, and an annular waterstop 6 is fixedly connected inside the concrete 5. The annular waterstop is fitted onto the waterproof sleeve 2. The annular waterstop 6 facilitates a secure connection with the concrete 5.
[0025] As required, foam 3 is polyurethane foam. Because polyurethane foam is a flexible filler material, it offers excellent sealing properties and a wide range of applications while also providing waterproofing, insulation, and ease of construction. It can also absorb some pipe stress. This utility model uses polyurethane foam to replace the hemp fiber in the original design, fundamentally eliminating the defects of hemp fiber in pipe sealing due to its material composition.
[0026] As required, waterproof mortar layer 4 is an expansive waterproof mortar. The expansive waterproof mortar replaces the original 1:2 cement mortar, and the expansive and waterproof properties of the substitute mortar fundamentally eliminate the hidden dangers caused by the original mortar's solidification shrinkage, water loss and cracking, which lead to poor sealing and uneven settlement of pipes or inspection wells.
[0027] Advantages of this utility model:
[0028] (1) As polyurethane foam is a flexible filler material, it has good sealing properties and a wide range of applications while taking into account waterproofing, heat insulation and convenient construction. At the same time, it can also absorb some of the pipe stress. This utility model uses polyurethane foam to replace the oil hemp in the original drawing set, which essentially eliminates the defects of oil hemp in pipe sealing due to its material composition.
[0029] (2) The 1:2 cement mortar used in the original drawing set has some cracks due to cement being a colloidal material. This poses a hidden danger to the sealing requirements. This utility model uses an expansive waterproof mortar to replace the original 1:2 cement mortar. By utilizing the expansiveness and waterproofness of the substitute mortar, it fundamentally eliminates the hidden dangers caused by the original mortar's solidification shrinkage and water loss leading to cracks, resulting in poor sealing and uneven settlement of pipes or inspection wells.
[0030] (3) The two materials used in this utility model, polyurethane foam and expanding waterproof mortar, each have good sealing properties. However, from the perspective of comprehensive factors such as the difficulty of operation and the location of implementation, the combination of the two and the fact that the inside is an elastic body and the outside is a rigid body have a good complementary effect and a high cost performance.
[0031] (4) The main technical means adopted by this utility model is to select the best alternative or optimize the original material based on the analysis of the original material characteristics. The alternative or optimized materials are combined in a superior way, and the performance of the materials themselves is complementary, so as to play the role of sealing, stress relief and protection, and fundamentally solve the problem of uneven settlement of pipelines or inspection wells caused by poor sealing due to defects in sealing materials.
[0032] The working process of this utility model is as follows:
[0033] (1) Inspection wells and pipelines are installed in place according to design requirements;
[0034] (2) At the point where the pipe penetrates the well wall, that is, between the pipe body 1 and the waterproof sleeve 2, polyurethane foam is used to fill the gap in layers (replacing the hemp in the drawing set). At the same time, the internal air bubbles, sealing performance, density and other indicators must be strictly controlled.
[0035] (3) The filler, namely polyurethane foam, has a groove with a depth of ≥30mm reserved on the outside, which is filled and sealed with expanding waterproof mortar;
[0036] (4) By using polyurethane foam and expanding waterproof mortar for double sealing, the drawbacks of the original drawing specifications can be solved in essence, and the sealing effect can be truly achieved.
[0037] The above technical features constitute the preferred embodiment of this utility model, which has strong adaptability and the best implementation effect. Unnecessary technical features can be added or removed according to actual needs to meet the needs of different situations.
Claims
1. A pipe penetration well wall sealing device, characterized in that... It includes a pipe body and a waterproof sleeve. The waterproof sleeve is located outside the pipe body, and an annular cavity is formed between the waterproof sleeve and the pipe body. The annular cavity is filled with expanding foam. Waterproof mortar layers are fixed at the annular cavity between the left and right ends of the waterproof sleeve and the pipe body, respectively.
2. The pipeline penetration sealing device according to claim 1, characterized in that... The waterproof mortar layer is fixed to the left and right ends of the expanding foam, and the outer surface of the waterproof mortar layer is flush with the left and right ends of the waterproof sleeve.
3. The pipeline penetration sealing device according to claim 1 or 2, characterized in that... The outer side of the waterproof sleeve is fixed with concrete, and an annular waterstop is fixedly connected inside the concrete. The annular waterstop is fitted onto the waterproof sleeve.
4. The pipeline penetration sealing device according to claim 1 or 2, characterized in that... The foam is polyurethane foam.
5. The pipeline penetration sealing device according to claim 3, characterized in that... The foam is polyurethane foam.
6. The pipeline penetration sealing device according to claim 1 or 2, characterized in that... The waterproof mortar layer is an expanding type of waterproof mortar.
7. The pipeline penetration sealing device according to claim 3, characterized in that... The waterproof mortar layer is an expanding type of waterproof mortar.
8. The pipeline penetration sealing device according to claim 4, characterized in that... The waterproof mortar layer is an expanding type of waterproof mortar.
9. The pipeline penetration sealing device according to claim 5, characterized in that... The waterproof mortar layer is an expanding type of waterproof mortar.