Waterproof sleeve transformation structure of pipeline well chamber

Abstract

The utility model relates to an old pipe network well chamber waterproof sleeve transformation structure, which belongs to the technical field of pipe network well chamber waterproofing and comprises an annular plate, a connecting sleeve and a well wall sealing device. The waterproof casing pipe penetrates through the well wall of the well chamber, and a water stop ring is arranged on the outer wall of the waterproof casing pipe and embedded in the well wall in a pouring mode. One end of the connecting sleeve is fixedly connected with the end, located outside the well chamber, of the waterproof sleeve, the other end of the connecting sleeve is fixedly connected with the annular plate, the well wall sealing device is fixedly connected with the annular plate, and the well wall sealing device is provided with a middle working core pipe. One end of the middle working core pipe is fixedly connected with the outer working core pipe located outside the well chamber, and the other end of the middle working core pipe sequentially penetrates through the annular plate, the connecting sleeve and the waterproof sleeve to be fixedly connected with the inner working core pipe located in the well chamber. The device is used for old pipe network well chamber pipeline transformation, underground water outside a well chamber is prevented from entering the well chamber, and the sealing waterproof effect of the well chamber is guaranteed.

Description

Technical Field

[0001] The utility model relates to a transformation structure of a waterproof sleeve for an old pipe network well chamber, belonging to the technical field of waterproof for pipe network well chambers. Background Technique

[0002] At present, the sealing structures of directly buried pipe well chamber waterproof sleeves (rigid waterproof sleeves and flexible waterproof sleeves) are all fabricated on the construction site. A sealing material is placed between the working pipe and the outer sleeve to prevent groundwater from entering the well chamber. Due to the uneven settlement of the pipe and the well chamber foundation, the working pipe and the outer sleeve are not concentric. Whether it is a rigid waterproof sleeve or a flexible waterproof sleeve, the sealing structure will fail to seal and waterproof due to non-concentricity. Groundwater will enter the well chamber through the pipe passing through the well wall, corroding valves, instruments, etc. in the well chamber and reducing the service life of the pipeline. When the working pipe and the outer sleeve are not concentric, the original sealing material cannot be used for maintenance, and the waterproof sleeve loses its sealing and waterproof function.

[0003] It is necessary to develop a well wall sealing product that can be used for the transformation of waterproof sleeves in old pipe network well chambers to solve the problem of waterproof sleeve failure and improve the service life of directly buried pipe networks. Content of the Utility Model

[0004] For the above technical reasons, the purpose of the utility model is to provide a transformation method for waterproof sleeves in old pipe network well chambers, mainly used to solve the problem of groundwater outside the old pipe network well chamber entering the well chamber.

[0005] To achieve the above purpose, the technical solution adopted by the utility model is: a transformation structure of a waterproof sleeve for a pipe well chamber, including an annular plate, a connecting sleeve, and a well wall sealing device; the waterproof sleeve passes through the well wall of the well chamber, and a water stop ring is arranged on the outer wall of the waterproof sleeve, and the water stop ring is cast and embedded in the well wall; one end of the connecting sleeve is fixedly connected to the end of the waterproof sleeve outside the well chamber, the other end of the connecting sleeve is fixedly connected to the annular plate, the well wall sealing device is fixedly connected to the annular plate, the well wall sealing device is provided with an intermediate working core pipe, one end of the intermediate working core pipe is fixedly connected to an outer working core pipe located outside the well chamber, and the other end of the intermediate working core pipe sequentially passes through the annular plate, the connecting sleeve and the waterproof sleeve, and is fixedly connected to an inner working core pipe located inside the well chamber.

[0006] Furthermore, the outer diameters and inner diameters of the outer working core pipe, the intermediate working core pipe, and the inner working core pipe are the same and are coaxially arranged. One end of the intermediate working core pipe is butt-welded to the connecting end of the outer working core pipe, and the other end of the intermediate working core pipe is butt-welded to the connecting end of the inner working core pipe; the outer working core pipe and the inner working core pipe are the remaining parts after cutting the original well chamber working core pipe inside and outside the well chamber and removing the intermediate pipe section.

[0007] Furthermore, the inner and outer diameters of the connecting sleeve and the waterproof sleeve are the same and they are coaxially arranged. One end of the connecting sleeve is welded to the port of the waterproof sleeve, and the other end of the connecting sleeve is welded to one side surface of the ring plate; the inner diameter of the ring plate is larger than the outer diameter of the middle working core pipe, and there is a gap between the ring plate and the middle working core pipe.

[0008] Furthermore, the inner diameter of the connecting sleeve and the waterproof sleeve is larger than the outer diameter of the middle working core pipe. Flexible thermal insulation materials are filled between the connecting sleeve and the middle working core pipe, and flexible thermal insulation materials are filled between the waterproof sleeve and the middle working core pipe.

[0009] Furthermore, the outer surfaces of the ring plate and the connecting sleeve are coated with epoxy paint or polyurea for anti-corrosion, and the thickness of the anti-corrosion coating is ≥ 1.2 mm; the two ends of the waterproof sleeve extend beyond the well wall by at least 10 mm.

[0010] Furthermore, a PE sleeve of a thermal insulation pipe is sleeved outside the outer working core pipe, and a polyurethane thermal insulation layer is filled between the PE sleeve of the thermal insulation pipe and the outer working core pipe; a PE sleeve of a thermal insulation pipe is sleeved outside the inner working core pipe, and a polyurethane thermal insulation layer is filled between the PE sleeve of the thermal insulation pipe and the inner working core pipe.

[0011] Furthermore, when the outer working core pipe and the middle working core pipe are welded, the connecting end of the outer working core pipe for connecting the middle working core pipe extends beyond the PE sleeve of the thermal insulation pipe and the polyurethane thermal insulation layer, and thermal insulation joint repair is carried out after welding; when the inner working core pipe and the middle working core pipe are welded, the connecting end of the inner working core pipe for connecting the middle working core pipe extends beyond the PE sleeve of the thermal insulation pipe and the polyurethane thermal insulation layer. After welding, flexible thermal insulation materials, glass fiber cloth, and aluminum foil fiberglass cloth are bundled on the exposed parts of the outer walls of the inner working core pipe and the middle working core pipe; the connecting end of the inner working core pipe is spaced from the inner side surface of the well wall.

[0012] Furthermore, when the outer working core pipe and the middle working core pipe are welded, the connecting end of the outer working core pipe extends beyond the PE sleeve of the thermal insulation pipe and the polyurethane thermal insulation layer by 200 mm; when the inner working core pipe and the middle working core pipe are welded, the connecting end of the inner working core pipe extends beyond the PE sleeve of the thermal insulation pipe and the polyurethane thermal insulation layer by 200 mm, and the connecting end of the inner working core pipe is spaced from the inner side surface of the well wall by at least 200 mm.

[0013] Furthermore, the wellbore sealing device further includes an outer protection steel pipe, a first baffle, a second baffle, a corrugated pipe, a first end pipe, a second end pipe, and an intermediate insulation pipe PE casing. The outer protection steel pipe is sleeved outside the intermediate working core pipe, and the outer protection steel pipe is welded and connected to the side surface of the ring plate away from the connecting casing. An intermediate insulation pipe PE casing, a first baffle, a first end pipe, a corrugated pipe, a second end pipe, and a second baffle are sequentially arranged between the outer protection steel pipe and the intermediate working core pipe. The second baffle is arranged close to the ring plate. The first baffle and the second baffle are welded and fixed to the inner wall of the outer protection steel pipe. The corrugated pipe is sleeved outside the intermediate working core pipe. One end of the corrugated pipe is welded and fixed to the first baffle through the first end pipe, and the other end of the corrugated pipe is welded and fixed to the second baffle through the second end pipe.

[0014] Furthermore, one end of the intermediate insulation pipe PE casing is welded and connected to the first baffle. A sealing sleeve and a sealing lining ring are assembled outside the intermediate insulation pipe PE casing, and the sealing sleeve and the sealing lining ring are arranged close to the first baffle. An intermediate polyurethane insulation layer is filled between the intermediate insulation pipe PE casing and the intermediate working core pipe. The connecting end of the intermediate working core pipe for connecting the outer working core pipe extends beyond the intermediate insulation pipe PE casing and the intermediate polyurethane insulation layer.

[0015] The precondition for the above-mentioned transformation device for waterproof sleeves in old pipe network well chambers is that the seal between the well chamber waterproof sleeve 13 and the wellbore (wall) 15 is reliable, and groundwater will not enter the well chamber through the gap between the wellbore 15 and the waterproof sleeve 13. The waterproof sleeve 13 is intact as a whole, and both ends should protrude from the wellbore by at least 10 mm. If the end of the waterproof sleeve 13 does not protrude from the wellbore, it is necessary to remove the wall around the outer circle of the end of the waterproof sleeve 13 to expose at least 10 mm.

[0016] The beneficial effects of the present utility model are as follows: The present utility model is used for the transformation of pipelines in old pipe network well chambers. In view of the existing structure leakage problems in the current market, an improved repair design is made. By connecting the ring plate, the connecting casing, and the wellbore sealing device to the original wellbore waterproof sleeve, groundwater outside the well chamber is prevented from entering the well chamber, ensuring the sealing and waterproof effect of the well chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of a device for transforming a waterproof sleeve of a pipeline well chamber of the present utility model;

[0018] Figure 2 It is a schematic diagram of the wellbore and the waterproof sleeve;

[0019] Figure 3 It is a schematic diagram of the broken pipe of the working core pipe;

[0020] In the figure, 1 is the PE casing of the heat-insulating pipe, 2 is the polyurethane heat-insulating layer, 3 is the outer working core pipe, 11 is the ring plate, 12 is the connecting casing, 13 is the waterproof casing, 14 is the water-stop ring, 15 is the well wall, and 16 is the inner working core pipe;

[0021] Well wall sealing device: 4 is the intermediate working core pipe, 5 is the intermediate polyurethane heat-insulating layer, 6 is the intermediate PE casing of the heat-insulating pipe, 7 is the sealing sleeve, 8 is the sealing lining ring, 9 is the corrugated pipe, 10 is the outer protection steel pipe, 17 is the first baffle plate, 18 is the first end pipe, 19 is the second end pipe, and 20 is the second baffle plate;

[0022] A. Original working core pipe of the well chamber. Specific embodiments

[0023] To make the above objects, features, and advantages of the present utility model more obvious and understandable, the specific embodiments of the present utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the present utility model. However, the present utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed below.

[0024] The well chamber waterproof pipeline structure of the present utility model is used for the pipeline transformation of old pipe network well chambers, and specifically includes a ring plate 11, a connecting casing 12, and a well wall sealing device; a waterproof casing 13 passes through the well wall 15 of the well chamber, a water-stop ring 14 is arranged on the outer wall of the waterproof casing 13, and the water-stop ring 14 is cast and embedded in the well wall 15; one end of the connecting casing 12 is fixedly connected to the end of the waterproof casing 13 outside the well chamber, the other end of the connecting casing 12 is fixedly connected to the ring plate 11, the well wall sealing device is fixedly connected to the ring plate 11, an intermediate working core pipe 4 is arranged on the well wall sealing device, one end of the intermediate working core pipe 4 is fixedly connected to the outer working core pipe 3 outside the well chamber, and the other end of the intermediate working core pipe 4 sequentially passes through the ring plate 11, the connecting casing 12, and the waterproof casing 13 and is fixedly connected to the inner working core pipe 16 in the well chamber.

[0025] Based on the above technical solution, the inner working core pipe 16 and the outer working core pipe 3 are formed by cutting the original pipeline, so the inner working core pipe 16 and the outer working core pipe 3 have the same specifications, and the intermediate working core pipe 4 used for replacement and connection has the same specifications as the inner working core pipe 16 and the outer working core pipe 3.

[0026] Further, the outer working core pipe 3, the middle working core pipe 4, and the inner working core pipe 16 have the same inner and outer diameter dimensions and are coaxially arranged. One end of the middle working core pipe 4 is butt-welded to the connecting end of the outer working core pipe 3, and the other end of the middle working core pipe 4 is butt-welded to the connecting end of the inner working core pipe 16; the outer working core pipe 3 and the inner working core pipe 16 are the remaining parts after cutting the original well chamber working core pipe inside and outside the well chamber and removing the middle pipe section.

[0027] Further, the connecting sleeve 12 and the waterproof sleeve 13 have the same inner and outer diameter dimensions and are coaxially arranged. One end of the connecting sleeve 12 is welded to the port of the waterproof sleeve 13, and the other end of the connecting sleeve 12 is welded to one side surface of the ring plate 11; the inner diameter of the ring plate 11 is larger than the outer diameter of the middle working core pipe 4, and there is a gap between the ring plate 11 and the middle working core pipe 4.

[0028] Further, the inner diameter dimensions of the connecting sleeve 12 and the waterproof sleeve 13 are larger than the outer diameter dimension of the middle working core pipe 4. Flexible thermal insulation materials are filled between the connecting sleeve 12 and the middle working core pipe 4, and flexible thermal insulation materials are filled between the waterproof sleeve 13 and the middle working core pipe 4. The flexible thermal insulation materials can be polyurethane thermal insulation layers or thermal insulation cotton.

[0029] Further, the outer surfaces of the ring plate 11 and the connecting sleeve 12 are painted with epoxy paint or polyurea for anti-corrosion, and the thickness of the anti-corrosion coating is ≥ 1.2 mm; the two ends of the waterproof sleeve 13 extend beyond the well wall by at least 10 mm.

[0030] Further, a thermal insulation pipe PE sleeve 1 is sleeved outside the outer working core pipe 3, and a polyurethane thermal insulation layer 2 is filled between the thermal insulation pipe PE sleeve 1 and the outer working core pipe 3; a thermal insulation pipe PE sleeve 1 is sleeved outside the inner working core pipe 16, and a polyurethane thermal insulation layer 2 is filled between the thermal insulation pipe PE sleeve 1 and the inner working core pipe 16. The outer working core pipe 3, the inner working core pipe 16, and the thermal insulation pipe PE sleeve 1 and the polyurethane thermal insulation layer 2 outside them are the pipeline structures of the original well chamber waterproof pipeline.

[0031] Further, when the outer working core pipe 3 and the middle working core pipe 4 are welded together, the connecting end of the outer working core pipe 3 for connecting the middle working core pipe 4 extends beyond the thermal insulation pipe PE sleeve 1 and the polyurethane thermal insulation layer 2, and thermal insulation joint repair is carried out after welding; when the inner working core pipe 16 and the middle working core pipe 4 are welded together, the connecting end of the inner working core pipe 16 for connecting the middle working core pipe 4 extends beyond the thermal insulation pipe PE sleeve 1 and the polyurethane thermal insulation layer 2. After welding, flexible thermal insulation materials, glass fiber cloth, and aluminum foil fiberglass cloth are tied around the exposed parts of the outer walls of the inner working core pipe 16 and the middle working core pipe 4; the connecting end of the inner working core pipe 16 is spaced from the inner side surface of the well wall.

[0032] Further, when the outer working core pipe 3 and the intermediate working core pipe 4 are welded together, the connecting end of the outer working core pipe 3 extends 200 mm beyond the PE casing 1 of the insulating pipe and the polyurethane insulating layer 200; when the inner working core pipe 16 and the intermediate working core pipe 4 are welded together, the connecting end of the inner working core pipe 16 extends 200 mm beyond the PE casing 1 of the insulating pipe and the polyurethane insulating layer 200, and the connecting end of the inner working core pipe 16 is spaced at least 200 mm from the inner surface of the well wall.

[0033] Further, the well wall sealing device further includes an outer protection steel pipe 10, a first baffle 17, a second baffle 20, a corrugated pipe 9, a first end pipe 18, a second end pipe 19 and an intermediate insulating pipe PE casing 6. The outer protection steel pipe 10 is sleeved outside the intermediate working core pipe 4, and the outer protection steel pipe 10 is welded to the side surface of the ring plate 11 away from the connecting sleeve 12. Between the outer protection steel pipe 10 and the intermediate working core pipe 4, there are successively arranged an intermediate insulating pipe PE casing 6, a first baffle 17, a first end pipe 18, a corrugated pipe 9, a second end pipe 19, and a second baffle 20. The second baffle 20 is arranged close to the ring plate 11. The first baffle 17 and the second baffle 20 are welded and fixed to the inner wall of the outer protection steel pipe 10. The corrugated pipe 9 is sleeved outside the intermediate working core pipe 4. One end of the corrugated pipe 9 is welded and fixed to the first baffle 17 through the first end pipe 18, and the other end of the corrugated pipe 9 is welded and fixed to the second baffle 20 through the second end pipe 19.

[0034] Further, one end of the intermediate insulating pipe PE casing 6 is welded to the first baffle 17. A sealing sleeve 7 and a sealing lining ring 8 are assembled outside the intermediate insulating pipe PE casing 6, and the sealing sleeve 7 and the sealing lining ring 8 are arranged close to the first baffle 17. An intermediate polyurethane insulating layer 5 is filled between the intermediate insulating pipe PE casing 6 and the intermediate working core pipe 4. The connecting end of the intermediate working core pipe 4 for connecting the outer working core pipe 3 extends beyond the intermediate insulating pipe PE casing 6 and the intermediate polyurethane insulating layer 5. The well wall sealing device is prefabricated at the manufacturer in advance, and the size, specifications and materials of the intermediate working core pipe 4, the intermediate insulating pipe PE casing 6 and the intermediate polyurethane insulating layer 5 should be kept as consistent as possible with the original pipeline.

[0035] It should be noted that the prerequisite for solving the leakage of the old pipe network well chamber is that the waterproofing between the well wall 15 and the waterproof casing 13 is effective, ensuring that the water outside the well does not leak into the well chamber through the gap between the well wall 15 and the waterproof casing 13; the waterproof casing 13 of the well wall 15 is intact, at least not affecting the use; if the length of the waterproof casing 13 is the same as the wall thickness and the two ends are flush, the waterproof casing 13 cannot be butt-welded (socket-welded) with the external casing subsequently. At this time, the wall around the outer circumference of the waterproof casing 13 needs to be removed, and at least 10 mm of the end of the waterproof casing 13 should be exposed to facilitate welding, as Figure 2 .

[0036] Furthermore, cut the pipe at the connection ends of the intermediate working core pipe 4 with the inner working core pipe 16 and the outer working core pipe 3. Before cutting the pipe at the wall-piercing part of the working core pipe, the length and position of the pipe to be cut should be calculated in advance.

[0037] Furthermore, the cut length of the working core pipe is determined according to the total length of the well wall sealing device provided by the well wall sealing device manufacturer and the convenience of on-site construction.

[0038] Furthermore, the fracture of the inner working core pipe 16 and the intermediate working core pipe 4 located inside the well chamber is ≥200mm away from the inner side of the well chamber wall, which is convenient for installation, welding and construction. Measure the cut length of the pipe from this position to the outside of the well chamber.

[0039] Furthermore, after cutting the working core pipe (the well wall sealing device is at the same position as the intermediate working core pipe 4), remove the intermediate pipe section. Keep the exposed length of 200mm at the ends of the remaining inner working core pipe 3 and outer working core pipe 16, and grind the end of the remaining working core pipe to a bevel according to the welding requirements, such as Figure 3 。

[0040] Furthermore, before installing the connecting sleeve 12, the diameter and wall thickness of the waterproof sleeve 13 should be confirmed first. The diameter and wall thickness of the connecting sleeve 12 should be as consistent as possible with those of the waterproof sleeve 13 to facilitate assembly and welding.

[0041] Furthermore, the connecting sleeve 12 is made with a length of 200mm.

[0042] Furthermore, the connecting sleeve 12 and the waterproof sleeve 13 are assembled and welded with full penetration welding. After welding, visual inspection and PT penetration testing are carried out. After the test results meet the requirements of the drawings and relevant technical requirements, the next process can be carried out.

[0043] Furthermore, before installing the ring plate 11, first confirm whether the size of the ring plate 11 meets the requirements. The dimensional fit between the ring plate 11 and the connecting sleeve 12 and the dimensional fit with the outer steel pipe 10 of the well wall sealing device.

[0044] Furthermore, the ring plate 11 and the connecting sleeve 12 are first spot welded and fixed, and then the well wall sealing device is installed. After the port sizes of both sides of the well wall sealing device are adjusted and fixed with the ports of the outer working core pipe 3 and the inner working core pipe 16, welding is carried out, and the ring plate 11 is welded to the outer steel pipe 10.

[0045] Furthermore, before installing the well wall sealing device, first determine the installation size and installation direction.

[0046] Furthermore, after the intermediate working core pipe 4 of the wellbore sealing device is aligned with the port groups of the working core pipes on both sides, welding is carried out, with a total of 3 weld seams: 1 weld seam inside the well and 2 weld seams outside the well. After welding, visual inspection and RT testing (or UT) are carried out, and the test results meet the requirements of the drawings and relevant technical specifications.

[0047] Furthermore, field heat preservation and joint repair are carried out on the outer working core pipe 3.

[0048] Furthermore, the inside of the connecting casing 12 and the waterproof casing 13 is filled with flexible heat preservation materials, and the exposed parts of the steel pipes in the well chamber are bundled with flexible heat preservation materials and wrapped with glass fiber cloth (+aluminum foil fiberglass cloth), and then bundled and fixed.

[0049] Furthermore, the outer surfaces of the ring plate 11 and the connecting casing 12 are painted with epoxy paint (or polyurea) for anti-corrosion, and the anti-corrosion thickness is ≥1.2 mm.

[0050] The specific installation method is as follows:

[0051] I. Pipe cutting

[0052] Cut the working core pipe (at the same position as the intermediate working core pipe 4 of the wellbore sealing device). Before cutting the working core pipe at the wall-piercing part (at the same position as the intermediate working core pipe 4 of the wellbore sealing device), the length and position of the pipe to be cut should be calculated in advance; after cutting the working core pipe (at the same position as the intermediate working core pipe 4 of the wellbore sealing device), remove the intermediate pipe section. The exposed length of the outer working core pipe 3 and the inner working core pipe 16 at the retained part is 200 mm, and the ends of the retained working core pipes are ground to form bevels according to the welding requirements.

[0053] II. Installation of connecting casing

[0054] Before installing the connecting casing 12, the diameter and wall thickness of the waterproof casing 13 should be confirmed first. The length of the connecting casing 12 is made according to 200 mm, and the connecting casing 12 is assembled and welded with the waterproof casing 13.

[0055] III. Installation of ring plate

[0056] Before installing the ring plate 11, first confirm whether the size of the ring plate 11 meets the requirements. The ring plate 11 and the connecting casing 12 are first spot-welded and fixed, and then the wellbore sealing device is installed. After the port sizes of both sides of the wellbore sealing device are adjusted and fixed with the ports of the outer working core pipe 3 and the inner working core pipe 16, welding is carried out.

[0057] IV. Installation of wellbore sealing device

[0058] Before installing the wellbore sealing device, first determine the installation dimensions and installation direction; after the wellbore sealing device (the wellbore sealing device includes an intermediate working core pipe 4, an intermediate polyurethane insulation layer 5, an intermediate insulation pipe PE casing 6, a sealing sleeve 7, a sealing lining ring 8, a corrugated pipe 9, an outer protection steel pipe 10, a first baffle 17, a first end pipe 18, a second end pipe 19, a second baffle 20, and the wellbore sealing device is prefabricated by the manufacturer in advance) is aligned with the ports of the two-side working core pipes, welding is carried out; on-site heat preservation repair is carried out on the outer working core pipe 3 part; the inside of the connecting casing 12 and the waterproof casing 13 is filled with flexible heat preservation materials, and the exposed parts of the steel pipes in the well chamber are bundled with flexible heat preservation materials and wrapped with fiberglass cloth (+aluminum foil fiberglass cloth), and then bundled and fixed; the outer surfaces of the ring plate 11 and the connecting casing 12 are painted with epoxy paint (or polyurea) for anti-corrosion, and the anti-corrosion thickness is ≥1.2mm.

[0059] This application gives the specific structure of the wellbore sealing device, but the technical solution of this application is not limited to this kind of wellbore sealing device, and other wellbore sealing devices with common structures in the art can also be used, which are installed in cooperation with the ring plate 11 and the connecting casing 12 of this application to realize the transformation of the well chamber pipeline.

[0060] It should be noted that the parts not detailed in this utility model are prior art.

[0061] In the description of this utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing this utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to this utility model.

[0062] In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of this utility model, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0063] In the present utility model, unless otherwise clearly defined and limited, terms such as "installation", "connection", "linkage", "fixation" and the like shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection or an integral one; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediate medium, and it may be the internal connection of two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0064] In the present utility model, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0065] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it may be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only implementation.

[0066] The above are only the best embodiments of the present utility model. Obviously, the present utility model is not limited to the above embodiments and there can be many variations. All variations that can be directly derived or associated by those of ordinary skill in the art from the content disclosed in the present utility model shall be considered as the protection scope of the present utility model.

Claims

1. A pipeline well chamber waterproof casing modification structure, characterized by: It includes a ring plate, a connecting sleeve and a well wall sealing device; the waterproof sleeve passes through the well wall of the well chamber, a water stop ring is arranged on the outer wall of the waterproof sleeve, and the water stop ring is cast and embedded in the well wall; one end of the connecting sleeve is fixedly connected to one end of the waterproof sleeve located outside the well chamber, the other end of the connecting sleeve is fixedly connected to the ring plate, the well wall sealing device is fixedly connected to the ring plate, the well wall sealing device is provided with an intermediate working core tube, one end of the intermediate working core tube is fixedly connected to an outer working core tube located outside the well chamber, and the other end of the intermediate working core tube passes through the ring plate, the connecting sleeve and the waterproof sleeve in sequence, and is fixedly connected to an inner working core tube located inside the well chamber.

2. A pipeline well chamber waterproof casing reconstruction structure according to claim 1, characterized in that: The outer working core tube, the middle working core tube and the inner working core tube have the same inner and outer diameters and are coaxially arranged, one end of the middle working core tube is welded to the connecting end of the outer working core tube, and the other end of the middle working core tube is welded to the connecting end of the inner working core tube; the outer working core tube and the inner working core tube are the original well chamber working core tubes that are cut off inside and outside the well chamber respectively, and the retained parts after the middle pipe section is removed.

3. A pipeline well chamber waterproof casing reconstruction structure according to claim 1, characterized in that: The connecting sleeve and the waterproof sleeve have the same inner and outer diameters and are coaxially arranged. One end of the connecting sleeve is welded to the waterproof sleeve port, and the other end of the connecting sleeve is welded to one side surface of the ring plate. The inner diameter of the ring plate is larger than the outer diameter of the middle working core tube, and there is a gap between the ring plate and the middle working core tube.

4. A pipeline well chamber waterproof casing reconstruction structure according to claim 1, characterized in that: The inner diameters of the connecting sleeve and the waterproof sleeve are larger than the outer diameter of the middle working core tube. Flexible insulation material is filled between the connecting sleeve and the middle working core tube, and flexible insulation material is filled between the waterproof sleeve and the middle working core tube.

5. A pipeline well chamber waterproof casing reconstruction structure according to claim 1, characterized in that: The outer surfaces of the ring plate and the connecting sleeve are painted with epoxy paint or polyurea for corrosion protection, and the thickness of the anti-corrosion paint is ≥1.2mm; the two end ports of the waterproof sleeve protrude from the well wall by at least 10mm.

6. A pipeline well chamber waterproof casing reconstruction structure according to claim 1, characterized in that: The outer working core tube is sheathed with a PE sleeve, and a polyurethane insulation layer is filled between the PE sleeve and the outer working core tube; the inner working core tube is sheathed with a PE sleeve, and a polyurethane insulation layer is filled between the PE sleeve and the inner working core tube.

7. A pipeline well chamber waterproof casing reconstruction structure according to claim 6, characterized in that: The connecting end of the inner working core tube is spaced apart from the inner surface of the well wall.

8. A pipeline well chamber waterproof casing reconstruction structure according to claim 6, characterized in that: When the outer working core tube and the middle working core tube are welded together, the connecting end of the outer working core tube extends 200mm beyond the PE casing of the thermal insulation pipe and the polyurethane thermal insulation layer; when the inner working core tube and the middle working core tube are welded together, the connecting end of the inner working core tube extends 200mm beyond the PE casing of the thermal insulation pipe and the polyurethane thermal insulation layer, and the connecting end of the inner working core tube is at least 200mm away from the inner surface of the well wall.

9. A pipeline well chamber waterproof casing reconstruction structure according to any one of claims 1 to 8, characterized in that: The well wall sealing device also includes an outer protective steel pipe, a first baffle, a second baffle, a bellows, a first end pipe, a second end pipe and an intermediate insulation pipe PE casing. The outer protective steel pipe is sleeved on the outside of the intermediate working core pipe. The outer protective steel pipe is welded to the side surface of the ring plate away from the connecting casing. The intermediate insulation pipe PE casing, the first baffle, the first end pipe, the bellows, the second end pipe and the second baffle are arranged in sequence between the outer protective steel pipe and the intermediate working core pipe. The second baffle is arranged close to the ring plate. The first baffle and the second baffle are welded and fixed to the inner wall of the outer protective steel pipe. The bellows is sleeved on the outer wall of the intermediate working core pipe. One end of the bellows is welded and fixed to the first baffle through the first end pipe, and the other end of the bellows is welded and fixed to the second baffle through the second end pipe.

10. A pipeline well chamber waterproof casing reconstruction structure according to claim 9, characterized in that: One end of the intermediate insulation pipe PE casing is welded to the first baffle, and a sealing sleeve and a sealing liner ring are installed outside the intermediate insulation pipe PE casing, and the sealing sleeve and the sealing liner ring are arranged close to the first baffle; an intermediate polyurethane insulation layer is filled between the intermediate insulation pipe PE casing and the intermediate working core pipe, and the connecting end of the intermediate working core pipe used to connect to the outer working core pipe exceeds the intermediate insulation pipe PE casing and the intermediate polyurethane insulation layer.

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