Large-diameter heat pipe penetrating casing plugging structure and construction method

Abstract

The application discloses a large-diameter heat pipe penetrating sleeve plugging structure and a construction method, which comprises a heat pipe, a sleeve, a structure, an annular double-layer rubber sealing ring and a small jack. The heat pipe penetrates the sleeve and extends into the structure; supporting pads are arranged between the sleeve and the heat preservation layer shell, so that the axis of the heat pipe and the axis of the sleeve are on the same straight line; an inner annular space is formed at the end of the heat pipe and the heat preservation layer shell; the annular double-layer rubber sealing ring is arranged between the heat pipe, the heat preservation layer shell and the sleeve; and the small jack is arranged in the annular double-layer rubber sealing ring to fix the annular double-layer rubber sealing ring. The small jack and the annular double-layer rubber sealing ring are used to seal the inner annular cavity and the outer annular cavity respectively, so that the underground water is prevented from seeping into the underground comprehensive pipe gallery or the underground heat exchange station through the gap between the heat preservation layer shell and the heat pipe or the gap between the heat preservation layer shell and the sleeve.

Description

Technical Field

[0001] This invention relates to the field of heating pipeline construction in municipal engineering, specifically to the casing and sealing structure and construction method for large-diameter heating pipelines. Background Technology

[0002] During the development and construction of northern cities, it is necessary to lay large-diameter main heating pipelines. When these large-diameter main heating pipelines enter underground utility tunnels or underground heat exchange stations, they need to pass through sleeves pre-embedded in the underground walls. Due to the large weight of the large-diameter pipelines, machinery is required during the connection construction. The construction machinery may damage the protective layer of the heating pipelines, causing external groundwater to enter between the heating pipelines and the outer shell of the insulation layer. This can lead to groundwater leakage from the heating pipelines and the outer shell of the insulation layer into the underground utility tunnels or underground heat exchange stations.

[0003] Furthermore, because the bottom of the insulation layer of the heating pipe is tightly attached to the bottom of the sleeve, the distance between the insulation layer and the inner wall of the sleeve is uneven, increasing the difficulty of sealing between them. Therefore, when large-diameter heating pipes pass through sleeves, leakage is prone to occur at the sleeve penetration point. Generally, only the outer insulation layer and the sleeve are sealed. Traditional sealing methods use rigid mortar mixed with hemp fibers or grouting, both using rigid materials. However, the insulation layer and its outer shell of the heating pipe are flexible materials. During operation, the heating pipe is filled with high-temperature hot water, and thermal expansion and contraction cause the outer insulation layer to expand and contract, frequently resulting in leakage around the sleeve. Summary of the Invention

[0004] To address the aforementioned deficiencies in existing technologies, a casing-sealing structure and construction method for large-diameter thermal pipelines are provided, which solves the problem of groundwater leakage from between the thermal pipeline and its outer insulation layer, or between the outer insulation layer and the casing, into underground utility tunnels or underground heat exchange stations.

[0005] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows:

[0006] A large-diameter thermal pipeline through-sleeve sealing structure includes a thermal pipeline, a sleeve, and a structure. The thermal pipeline is installed inside the sleeve, and the outer wall of the sleeve is fixed inside the structure. An insulation layer shell is provided around the thermal pipeline, and a uniformly thick insulation layer is filled between the two.

[0007] The invention is characterized by comprising an annular double-layer rubber sealing ring and small jacks. The annular double-layer rubber sealing ring consists of an outer sealing ring, a middle groove, and an inner sealing ring, and the cross-section of the annular double-layer rubber sealing ring adopts a digital 3-type structure. The end of the insulation layer shell is flush with the inner wall of the structure's side wall, and the axis of the thermal pipeline and the axis of the sleeve are on the same straight line. A certain length of inner cavity is provided between the end of the insulation layer shell and the thermal pipeline. The middle groove of the annular double-layer rubber sealing ring is located at the end of the insulation layer shell. The outer sealing ring and the inner sealing ring are respectively placed between the sleeve and the insulation layer shell, and between the insulation layer shell and the thermal pipeline, with the notch of the annular double-layer rubber sealing ring facing outward. Several small jacks are circumferentially spaced in the notches of the outer and inner sealing rings, and the small jacks are used to seal the annular double-layer rubber sealing ring between the sleeve and the insulation layer shell, and between the insulation layer shell and the thermal pipeline.

[0008] According to the above technical solution, two reinforcing protrusions are provided on both the inner and outer sealing rings of the annular double-layer rubber sealing ring; arc-shaped rigid grooves matching the reinforcing protrusions are welded to both ends of the small jack. The small jack presses the reinforcing protrusions through the arc-shaped rigid grooves, so that the outer sealing ring is fixed between the insulation layer shell and the heat pipe, and the inner sealing ring is fixed between the sleeve and the insulation layer shell.

[0009] According to the above technical solution, all the reinforcing protrusions are on the same plane.

[0010] According to the above technical solution, a support pad is provided between the outer shell of the insulation layer and the sleeve. Under the action of the support pad, the thermal pipeline and the sleeve are coaxial. The support pad is located at the lower part of the inner wall of the sleeve and close to the end of the sleeve.

[0011] A method for sealing large-diameter thermal pipelines with sleeves, characterized by employing any of the above-described large-diameter thermal pipeline sleeve sealing structures, comprising the following steps:

[0012] S1: Insert the heating pipe through the sleeve into the interior of the structure;

[0013] S2: Install support pads between the sleeve and the outer shell of the insulation layer so that the axis of the thermal pipe and the axis of the sleeve are on the same straight line;

[0014] S3: An inner annular space is opened at the end of the heat pipe and the outer shell of the insulation layer;

[0015] S4: Install the annular double-layer rubber sealing ring between the heat pipe, the outer shell of the insulation layer, and the sleeve;

[0016] S5: Install a small jack inside the annular double-layer rubber sealing ring to fix the annular double-layer rubber sealing ring.

[0017] According to the above technical solution, in step S1, the length of the heating pipe extending into the structure is adjusted so that the end of the insulation layer shell is flush with the inner wall of the side wall of the structure.

[0018] According to the above technical solution, in step S3, a certain length of insulation layer is cleaned along the axis of the heat pipe, thereby forming an inner annular space at the end of the heat pipe and the outer shell of the insulation layer; the length of the insulation layer cleaned ranges from 5cm to 8cm.

[0019] According to the above technical solution, in step S4, the middle groove of the annular double-layer rubber sealing ring is engaged with the end of the exposed insulation layer shell, the outer sealing ring blocks the outer cavity formed between the outer wall of the insulation layer shell and the inner wall of the sleeve, and the inner sealing ring blocks the inner cavity formed between the outer wall of the heat pipe and the inner wall of the insulation layer shell.

[0020] According to the above technical solution, in step S5, the annular double-layer rubber sealing ring is divided into multiple regions. The size of the regions is determined by the specifications of the small jacks, and the number of regions is determined by the size of the heat pipe. In each region, the small jacks are installed in the inner cavity and the outer cavity respectively. The small jacks use the arc-shaped rigid grooves to press the reinforcing protrusions against the heat pipe, the outer shell of the insulation layer, or the sleeve, thereby achieving the pressing and fixing of the annular double-layer rubber sealing ring.

[0021] According to the above technical solution, multiple areas are divided into several symmetrical areas based on whether they are symmetrical about the center of the heating pipe; small jacks need to be installed in the two areas of any symmetrical area in turn.

[0022] The present invention has the following beneficial effects:

[0023] 1. Using a small jack, the outer sealing ring of the annular double-layer rubber sealing ring is pressed against the outer wall of the insulation shell and the inner wall of the sleeve, while the inner sealing ring is pressed against the outer wall of the heat pipe and the inner wall of the insulation shell. This achieves the sealing of the inner and outer cavities by the annular double-layer rubber sealing ring, preventing groundwater from leaking into the underground integrated pipe gallery or underground heat exchange station through the gaps between the insulation shell and the heat pipe or between the insulation shell and the sleeve.

[0024] 2. Using a ring-shaped double-layer rubber sealing ring to seal the space between the insulation layer shell and the heating pipe is a more efficient method than the existing technology that uses rigid mortar mixed with hemp fibers or grouting to seal the space. This avoids gaps caused by thermal expansion and contraction, which could lead to groundwater leakage from the gaps between the insulation layer shell and the casing into the underground integrated pipe gallery or underground heat exchange station. Attached Figure Description

[0025] Figure 1 This is a plan view showing the relationship between the thermal pipe, the sleeve, and the outer shell of the insulation layer in an embodiment of the present invention.

[0026] Figure 2 This is a perspective view of the relationship between the thermal pipe, the sleeve, and the outer shell of the insulation layer provided in the embodiment of the present invention;

[0027] Figure 3 This is a schematic diagram of the structure of an embodiment provided by the present invention;

[0028] Figure 4 This is a partial structural schematic diagram of an embodiment provided by the present invention;

[0029] Figure 5 This is a schematic diagram of the structure of the double-layer rubber sealing ring and the small jack provided in the embodiment of the present invention;

[0030] Figure 6 This is a three-dimensional double-layer rubber sealing ring provided in the embodiment of the present invention. Figure 1 ;

[0031] Figure 7 This is a three-dimensional double-layer rubber sealing ring provided in the embodiment of the present invention. Figure 2 ;

[0032] Figure 8 This is a schematic diagram of the structure of an embodiment provided by the present invention;

[0033] In the diagram, 1. Heating pipe; 2. Sleeve; 3. Structure; 4. Insulation layer shell; 5. Insulation layer; 6. Double-layer rubber sealing ring; 6-1. Outer sealing ring; 6-2. Middle groove; 6-3. Inner sealing ring; 7. Small jack; 8. Reinforcing protrusion; 9. Arc-shaped rigid groove; 10. Outer cavity; 11. Inner cavity; 12. Pad block. Detailed Implementation

[0034] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0035] Reference Figures 1-2 As shown, the present invention provides a large-diameter thermal pipeline through-sleeve sealing structure, including a thermal pipeline 1, a sleeve 2 and a structure 3. The thermal pipeline is installed inside the sleeve, and the outer wall of the sleeve is fixed inside the structure. An insulation layer shell 4 is provided around the thermal pipeline, and a uniformly thick insulation layer 5 is filled between the two.

[0036] The invention is characterized by comprising: an annular double-layer rubber sealing ring 6 and small jacks 7; the annular double-layer rubber sealing ring is divided into an outer sealing ring 6-1, a middle groove 6-2, and an inner sealing ring 6-3; the cross-section of the annular double-layer rubber sealing ring adopts a digital 3-type structure; the end of the insulation layer shell is flush with the inner wall of the structure's side wall, the axis of the thermal pipeline and the axis of the sleeve are on the same straight line, and a certain length of inner cavity is provided between the end of the insulation layer shell and the thermal pipeline; the middle groove of the annular double-layer rubber sealing ring is located on the end of the insulation layer shell; the outer sealing ring and the inner sealing ring are respectively placed between the sleeve and the insulation layer shell, and between the insulation layer shell and the thermal pipeline, with the notch of the annular double-layer rubber sealing ring facing outwards; several small jacks are circumferentially spaced in the notches of the outer and inner sealing rings, and the small jacks are used to seal the annular double-layer rubber sealing ring between the sleeve and the insulation layer shell, and between the insulation layer shell and the thermal pipeline.

[0037] According to the above technical solution, two reinforcing protrusions 8 are provided on both the inner and outer sealing rings of the annular double-layer rubber sealing ring; arc-shaped rigid grooves 9 matching the reinforcing protrusions are welded to both ends of the small jack. The small jack presses the reinforcing protrusions through the arc-shaped rigid grooves, so that the outer sealing ring is fixed between the insulation layer shell and the heat pipe, and the inner sealing ring is fixed between the sleeve and the insulation layer shell.

[0038] According to the above technical solution, all the reinforcing protrusions are on the same plane.

[0039] According to the above technical solution, a support pad 12 is provided between the outer shell of the insulation layer and the sleeve. Under the action of the support pad, the thermal pipeline and the sleeve are coaxial. The support pad is located at the lower part of the inner wall of the sleeve and close to the end of the sleeve.

[0040] A method for sealing large-diameter thermal pipelines with sleeves, characterized by employing any of the above-described large-diameter thermal pipeline sleeve sealing structures, comprising the following steps:

[0041] S1: Insert the heating pipe through the sleeve into the interior of the structure;

[0042] S2: Install support pads between the sleeve and the outer shell of the insulation layer so that the axis of the thermal pipe and the axis of the sleeve are on the same straight line;

[0043] S3: An inner annular space is opened at the end of the heat pipe and the outer shell of the insulation layer;

[0044] S4: Install the annular double-layer rubber sealing ring between the heat pipe, the outer shell of the insulation layer, and the sleeve;

[0045] S5: Install a small jack inside the annular double-layer rubber sealing ring to fix the annular double-layer rubber sealing ring.

[0046] According to the above technical solution, in step S1, the length of the heating pipe extending into the structure is adjusted so that the end of the insulation layer shell is flush with the inner wall of the side wall of the structure.

[0047] According to the above technical solution, in step S3, a certain length of insulation layer is cleaned at the end of the insulation layer shell along the axis of the heat pipe, thereby forming an inner annular space at the end of the heat pipe and the insulation layer shell; the length of the cleaned insulation layer ranges from 5cm to 8cm.

[0048] According to the above technical solution, in step S4, the middle groove of the annular double-layer rubber sealing ring is engaged with the exposed end of the insulation layer shell. The outer sealing ring seals the outer cavity 10 formed between the outer wall of the insulation layer shell and the inner wall of the sleeve, and the inner sealing ring seals the inner cavity 11 formed between the outer wall of the heat pipe and the inner wall of the insulation layer shell. A small jack presses the outer sealing ring of the annular double-layer rubber sealing ring against the outer wall of the insulation layer shell and the inner wall of the sleeve, and presses the inner sealing ring against the outer wall of the heat pipe and the inner wall of the insulation layer shell. The annular double-layer rubber sealing ring seals the inner cavity and the outer cavity respectively, preventing groundwater from leaking into the underground integrated pipe gallery or underground heat exchange station from the gaps between the insulation layer shell and the heat pipe or between the insulation layer shell and the sleeve.

[0049] According to the above technical solution, in step S5, the annular double-layer rubber sealing ring is divided into multiple regions. The size of the regions is determined by the specifications of the small jacks, and the number of regions is determined by the size of the heat pipe. In each region, the small jacks are installed in the inner cavity and the outer cavity respectively. The small jacks use the arc-shaped rigid grooves to press the reinforcing protrusions against the heat pipe, the outer shell of the insulation layer, or the sleeve, thereby achieving the pressing and fixing of the annular double-layer rubber sealing ring.

[0050] According to the above technical solution, multiple areas are divided into several symmetrical areas based on whether they are symmetrical about the center of the heating pipe; small jacks need to be installed in the two areas of any symmetrical area in turn.

[0051] The above are merely preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. Therefore, any equivalent changes made in accordance with the claims of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A large-diameter thermal pipeline through-sleeve sealing structure, comprising a thermal pipeline, a sleeve, and a structure, wherein the thermal pipeline is installed inside the sleeve, and the outer wall of the sleeve is fixed inside the structure; an insulation layer shell is provided around the thermal pipeline, and a uniformly thick insulation layer is filled between the two. Its features are: The system includes a double-layered annular rubber sealing ring and small jacks. The double-layered annular rubber sealing ring consists of an outer sealing ring, a middle groove, and an inner sealing ring. The cross-section of the double-layered annular rubber sealing ring adopts a digital 3-type structure. The end of the insulation shell is flush with the inner wall of the structure's side wall, and the axis of the heating pipe and the axis of the sleeve are on the same straight line. A cavity of a certain length is provided between the end of the insulation shell and the heating pipe. The middle groove of the double-layered annular rubber sealing ring is located at the end of the insulation shell. The outer and inner sealing rings are respectively placed between the sleeve and the insulation shell, and between the insulation shell and the heating pipe, with the notches of the double-layered annular rubber sealing ring facing outwards. Several small jacks are circumferentially spaced in the notches of the outer and inner sealing rings. The small jacks are used to seal the double-layered annular rubber sealing ring between the sleeve and the insulation shell, and between the insulation shell and the heating pipe.

2. The large-diameter thermal pipeline through-sleeve sealing structure according to claim 1, characterized in that: The inner and outer sealing rings of the annular double-layer rubber sealing ring are provided with two reinforcing protrusions; the two ends of the small jack are welded with arc-shaped rigid grooves that match the reinforcing protrusions. The small jack presses the reinforcing protrusions through the arc-shaped rigid grooves, so that the outer sealing ring is fixed between the insulation shell and the heat pipe, and the inner sealing ring is fixed between the sleeve and the insulation shell.

3. The large-diameter thermal pipeline through-sleeve sealing structure according to claim 2, characterized in that: All the reinforcing protrusions are on the same plane.

4. The large-diameter thermal pipeline through-sleeve sealing structure according to claim 1, characterized in that: A support pad is provided between the outer shell of the insulation layer and the sleeve, and the thermal pipe and the sleeve are coaxial under the action of the support pad.

5. A method for sealing large-diameter thermal pipelines through sleeves, characterized in that: The large-diameter thermal pipeline through-sleeve sealing structure as described in any one of claims 1-4 includes the following steps: S1: Insert the heating pipe through the sleeve into the interior of the structure; S2: Install support pads between the sleeve and the outer shell of the insulation layer so that the axis of the thermal pipe and the axis of the sleeve are on the same straight line; S3: An inner annular space is opened at the end of the heat pipe and the outer shell of the insulation layer; S4: Install the annular double-layer rubber sealing ring between the heat pipe, the outer shell of the insulation layer, and the sleeve; S5: Install a small jack inside the annular double-layer rubber sealing ring to fix the annular double-layer rubber sealing ring.

6. The method for sealing large-diameter thermal pipelines through sleeves according to claim 5, characterized in that: In step S1, the length of the heating pipe extending into the structure is adjusted so that the end of the insulation layer shell is flush with the inner wall of the side wall of the structure.

7. The method for sealing large-diameter thermal pipelines with sleeves according to claim 5, characterized in that: In step S3, a certain length of insulation layer is cleaned along the axis of the heat pipe, thereby forming an inner annular space at the end of the heat pipe and the outer shell of the insulation layer; the length of the insulation layer cleaned ranges from 5cm to 8cm.

8. The method for sealing large-diameter thermal pipelines through sleeves according to claim 5, characterized in that: In step S4, the middle groove of the annular double-layer rubber sealing ring is engaged with the end of the exposed insulation layer shell. The outer sealing ring blocks the outer cavity formed between the outer wall of the insulation layer shell and the inner wall of the sleeve, and the inner sealing ring blocks the inner cavity formed between the outer wall of the heat pipe and the inner wall of the insulation layer shell.

9. The method for sealing large-diameter thermal pipelines through sleeves according to claim 8, characterized in that: In step S5, the annular double-layer rubber sealing ring is divided into multiple regions. The size of the regions is determined by the specifications of the small jacks, and the number of regions is determined by the size of the heat pipe. In each region, the small jacks are installed in the inner cavity and the outer cavity, respectively. The small jacks use the arc-shaped rigid grooves to press the reinforcing protrusions against the heat pipe, the outer shell of the insulation layer, or the sleeve, thereby achieving the pressing and fixing of the annular double-layer rubber sealing ring.

10. The method for sealing large-diameter thermal pipelines with sleeves according to claim 9, characterized in that: The multiple areas are divided into several symmetrical areas based on whether they are symmetrical about the center of the heating pipe; small jacks need to be installed in the two areas of any symmetrical area in turn.

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