Prefabricated calandria casing pipe sealing element for electric power calandria working well

Abstract

The invention provides a prefabricated calandria casing pipe sealing element for an electric power calandria working well. The prefabricated calandria casing pipe sealing element comprises a plugging sealing component and a casing pipe connecting sealing component. The plugging sealing part is provided with an end sealing plate and a sealing connecting cylinder; an annular sealing ring is assembled on the outer wall of the sealing connecting cylinder; the casing pipe connecting and sealing component comprises a casing pipe connecting section, a water stopping casing pipe section and a plugging connecting casing pipe section, and the outer wall of the water stopping casing pipe section is provided with water stopping threads and a water stopping baffle. The sealing piece is of a multi-sealing structure and comprises flexible rubber, a first split sealing part and a second split sealing part which are connected in an inserted mode, a self-adaptive sealing compensation material is combined, a sealing gap is automatically compensated, and the sealing reliability is improved. The connecting plates in the opposite directions are in a female and male buckle design, up-down buckling and left-right buckling are achieved, the calandria is rapidly fixed, and the installation efficiency is improved. A reinforcing supporting plate and a glue fixing hole are arranged in the sealing piece, structural stability and corrosion resistance are guaranteed, and the sealing piece is suitable for construction of the electric power pipe bank working well under various environmental conditions.

Description

Technical Field

[0001] The present invention relates to the technical field of power engineering, and particularly to a prefabricated pipe sleeve seal for a power pipe jacking shaft. Background Art

[0002] During the laying, application and maintenance of power pipes, the sealing of pipes is crucial. On the one hand, the complex underground environment of power shafts not only makes it easy for groundwater, corrosive substances, etc. to penetrate into the interior of the pipes, but also when the pipes are damaged or affected by factors such as vibration, aging, and deformation, the pipe seals with traditional structures are very likely to lose their sealing function, thus affecting the normal operation and service life of the power system. On the other hand, the existing pipe seals have a single function, and on-site operators need to prepare different types of components for corresponding construction, which does not meet the different scenario requirements such as fixed-spacing support connection, tight connection, and rapid assembly of pipes. Therefore, it is of great significance to develop a prefabricated pipe sleeve seal for a power pipe jacking shaft with good sealing effect and convenient assembly. Summary of the Invention

[0003] Aiming at the deficiencies in the prior art, the present invention provides a prefabricated pipe sleeve seal for a power pipe jacking shaft with a multi-layer sealing structure, an adaptive sealing compensation function, and rapid installation characteristics.

[0004] A prefabricated pipe sleeve seal for a power pipe jacking shaft proposed by the present invention includes a plugging and sealing component and a sleeve connection and sealing component; the plugging and sealing component includes an end sealing plate, a sealing connection cylinder is provided in the middle of the end sealing plate, a clamping groove is provided on the outer wall of the sealing connection cylinder, and an annular sealing ring is assembled in the clamping groove; a plurality of connection holes are provided at the edge of the end sealing plate; the sleeve connection and sealing component includes a sleeve connection section, a water stop sleeve section, and a plugging connection sleeve section connected in sequence, a connecting plate is provided on the outside of the connection area between the water stop sleeve section and the plugging connection sleeve section, a clamping structure and a preset incision for conveniently breaking the connecting plate are provided on the connecting plate; a plurality of water stop threads and water stop baffles are provided on the outer wall of the water stop sleeve section to enhance the water stop performance; the plugging connection sleeve section includes a trumpet-shaped access section matching the sealing connection cylinder, one end of the trumpet-shaped access section is connected to the water stop sleeve section, and a sealing connection plate is provided on the outer edge of the other end; a plurality of bolt connection columns are provided on the sealing connection plate at positions corresponding to the connection holes of the end sealing plate for fixed connection.

[0005] Specifically, a flexible rubber is provided on the side of the sealing connection cylinder away from the end sealing plate of the plugging and sealing component.

[0006] Specifically, a first split seal part is provided on one side of the plugging and sealing component away from the end sealing plate or on the flexible rubber, and a second split seal part is provided on one side of the sleeve connection and sealing component close to the trumpet-shaped access section of the water-stop sleeve section; both the first split seal part and the second split seal part include a plurality of sealing units distributed with circumferential dislocation; the sealing units of the first split seal part and the second split seal part can be matched and inserted to form a multi-combination seal structure.

[0007] Specifically, the flexible rubber and / or the sealing units of the first split seal part include self-adaptive seal compensation materials, and the sealing units of the second split seal part are seal guiding grooves or include self-adaptive seal compensation materials; the self-adaptive seal compensation materials include one of water-swellable rubber, shape memory alloy or pre-compressed elastic materials, and are used to automatically compensate for the seal gap during the sealing process to improve the seal reliability.

[0008] Specifically, a plurality of reinforcing support plates are provided in the sealing connection cylinder, the reinforcing support plates are connected to the end sealing plate, and at least two ends of one of the reinforcing support plates are connected to the inner wall of the sealing connection cylinder to prevent the sealing connection cylinder from deforming under pressure and ensure the seal stability.

[0009] Specifically, the plugging connection sleeve section at least includes a sleeve connection section and a sleeve connection and sealing section; the inner diameter of the sleeve connection section is larger than that of the sleeve connection and sealing section; on the inner wall between the sleeve connection section and the sleeve connection and sealing section, a plurality of semi-closed and semi-open glue-fixing holes are evenly distributed to accommodate the colloid during the sleeve connection construction and enhance the fixing strength.

[0010] Compared with the prior art, the plugging and sealing component of the present invention is mainly used to plug the end of the drainage pipe sleeve, while the sleeve connection and sealing component is used to connect the drainage pipe sleeve and realize the sealing function. Through the sealing structure formed by the matching insertion of the sealing ring, the first split seal part and the second split seal part, all of which include a plurality of sealing units distributed with circumferential dislocation, the self-adaptive seal compensation structure and the glue-fixing hole design, a multi-combination seal structure is formed. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic structural diagram of Embodiment 1;

[0012] Figure 2 It is a schematic structural diagram of the plugging and sealing component in Embodiment 1 of the present invention.

[0013] Figure 3 It is a schematic structural diagram of the sleeve connection and sealing component in Embodiment 1 of the present invention.

[0014] Figure 4 It is a schematic structural diagram of the buckle in Embodiment 1 of the present invention.

[0015] Figure 5 This is a schematic structural diagram of the plugging and sealing component in Embodiment 2 of the present invention. Detailed implementation manners

[0016] The technical solutions in the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0017] Embodiment 1:

[0018] During the construction of the power pipe gallery, the connection and sealing of the pipe sleeves are key links to ensure the safety of cable laying. Traditional sealing methods have problems such as poor sealing effect and complex installation during the installation process. To solve these problems, the sealing member of the present invention provides an efficient and reliable solution for the construction of the power pipe gallery through a multi-layer sealing structure, an adaptive sealing compensation function, and a quick installation design. This embodiment provides a prefabricated pipe sleeve sealing member for a power pipe gallery, as Figures 1 - 4 shown, which includes a plugging and sealing component 1 and a sleeve connection and sealing component 2; the plugging and sealing component 1 includes an end sealing plate 101, a sealing connection cylinder 102 is provided in the middle of the end sealing plate 101, a clamping groove is provided on the outer wall of the sealing connection cylinder 102, and an annular sealing ring 103 is assembled in the clamping groove; the annular sealing ring 103 is made of corrosion-resistant and aging-resistant materials, and the cross-section of the annular sealing ring is trapezoidal or circular to improve the sealing performance and environmental adaptability.

[0019] A plurality of connection holes 104 are provided at the edge of the end sealing plate 101; the sleeve connection and sealing component 2 includes a sleeve connection section 201, a water-stop sleeve section 202, and a plugging connection sleeve section 203 connected in sequence. A connecting plate is provided on the outer side of the connection area between the water-stop sleeve section 202 and the plugging connection sleeve section 201, and a snap structure and a preset incision for conveniently breaking the connecting plate are provided on the connecting plate; the snap structure on the connecting plate is a male-female snap. As Figure 4 shown, the snap 211b and the snap 211a are snap-fit structures, and the snap 212a and the snap 212b are snap-fit structures. Thus, when multiple sleeve connection and sealing components 2 are used, the adjacent sleeve connection and sealing components above, below, left, and right can be snap-connected, so that the power pipe can be quickly built and fixed in the manhole; when the snap structure is not required, the connecting plate can also be broken off based on the preset incision; the preset incision is a groove cut along the root of the connecting plate or near the root of the connecting plate; after removing the connecting plate, it can adapt to a relatively tighter size range of pipe laying scenarios. A plurality of water-stop threads 204 and water-stop baffles 205 are provided on the outer wall of the water-stop sleeve section 202 to enhance the water-stop performance; the cross-section of the water-stop baffle 205 is L-shaped or T-shaped, and the water-stop threads 204 are spirally or annularly distributed to enhance the water-stop effect and prevent water flow penetration.

[0020] The plugging connection sleeve section 203 includes a flared access section that matches the sealing connection cylinder. One end of the flared access section is connected to the water-stop sleeve section 202, and a sealing connection plate is provided at the outer edge of the other end. It should be noted that the flared access section mainly serves as a guiding function. The inner diameter of the water-stop sleeve section 202 at the end adjacent to the flared access end is slightly larger than the diameter of the middle or right side of the water-stop sleeve section 202, so as to match and connect with the insertion section of the sealing connection sleeve 102, and make the inner wall abut against the annular sealing ring 103 to form a seal. A number of bolt connection posts 206 are provided on the sealing connection plate at the positions corresponding to the connection holes of the end sealing plate for fixed connection. A number of strengthening support plates 105 are provided in the sealing connection cylinder 102. The strengthening support plates 105 are connected to the end sealing plate 104, and at least one of the strengthening support plates is connected to the inner wall of the sealing connection cylinder at both ends to prevent the sealing connection cylinder from deforming under pressure and ensure sealing stability. The plugging connection sleeve section at least includes a sleeve connection section and a sleeve connection sealing section; the inner diameter of the sleeve connection section is larger than the inner diameter of the sleeve connection sealing section; on the inner wall between the sleeve connection section and the sleeve connection sealing section, a number of semi-closed and semi-open glue-fixing holes are evenly distributed for accommodating glue during sleeve connection construction to enhance the fixing strength. The diameter of the glue-fixing holes is 2 mm - 4 mm, the depth is not greater than 2 mm, and the minimum distance between adjacent glue-fixing holes is not greater than the diameter of the glue-fixing holes to ensure uniform filling of the glue and enhance the connection strength.

[0021] The plugging and sealing component is provided with a first split sealing part on the side of the sealing connection cylinder away from the end sealing plate, and the sleeve connection sealing component is provided with a second split sealing part on the side of the water-stop sleeve section close to the flared access section; both the first split sealing part and the second split sealing part include a number of sealing units distributed in a circumferentially staggered manner, and the sealing units of the first split sealing part and the sealing units of the second split sealing part can be matched and inserted to form a multi-combination sealing structure. The sealing unit of the first split sealing part includes an adaptive sealing compensation material, and the adaptive sealing compensation material is a water-swellable rubber for automatically compensating the sealing gap during the sealing process and improving the sealing reliability. In this embodiment, the sealing unit of the second split sealing part is a sealing guide groove integrally formed with the sleeve connection sealing component; specifically, when implementing, the following steps are carried out:

[0022] Step 1: Apply glue

[0023] Apply glue to the outer circumference of the pipe row and the inner wall between the sleeve connection section and the sleeve connection sealing section, so that when the pipe row is inserted into the sleeve connection section, the glue-fixing holes are filled with glue to enhance the fixing strength and sealing effect. Epoxy resin glue fills the glue-fixing holes, and the glue forms a stable fixing structure after curing, enhancing the overall strength of the seal. Before applying glue, the surface of the pipe row can be cleaned.

[0024] Step 2: Assemble the sleeve connection sealing component

[0025] When fixing the end, the plugging and sealing component and the sleeve connection sealing component can be assembled according to the male-female snap design in the opposite direction. The design of the male-female snap structure enables the connecting plate to achieve up-and-down snap and left-and-right snap, quickly fixing the row of pipes. At the construction site, the operator aligns the end sealing plate of the plugging and sealing component with the sealing connecting plate of the sleeve connection sealing component, and uses the male-female snap structure to complete the up-and-down snap and left-and-right snap. The whole process only takes a few minutes, significantly improving the installation efficiency. When end fixing is not required and a tighter row of pipes is needed, then break off the connecting plate and lay it as required.

[0026] Step 3: Plug sealing

[0027] Connect the plugging and sealing component and the sleeve connection sealing component by bolts, so that the sealing units of the first split sealing part and the second split sealing part are matched and inserted correspondingly. Combining the sealing connection of the sealing ring and the sleeve end forms a multi-combination sealing structure. In this embodiment, the sealing unit of the first split sealing part adopts an adaptive sealing compensation material (such as water-swellable rubber), and the sealing unit of the second split sealing part is a sealing guide groove. During the insertion process, the adaptive sealing compensation material automatically fills the sealing gap to ensure the sealing effect. During construction, it is necessary to ensure that the connection holes of the end sealing plate and the bolt connection columns of the sealing connecting plate are fixed by bolts and nuts to strengthen the stability and sealing reliability.

[0028] In a wet environment, the water-swellable rubber automatically expands to compensate for the sealing gap, thus ensuring the sealing effect.

[0029] Compared with the prior art, this embodiment has the following beneficial effects:

[0030] 1. Multi-layer sealing: Through the multi-layer sealing structure and the adaptive sealing compensation function, the sealing effect is effectively improved.

[0031] 2. Quick installation: Through the male-female snap structure and the bolt connection design, the installation efficiency is significantly improved.

[0032] 3. Structural stability: Through the design of the strengthening support plate and the glue-fixing holes, the structural stability and fixing strength of the sealing part are ensured.

[0033] Embodiment 2:

[0034] Such as Figure 5As shown in the figure, the difference between this embodiment and Embodiment 1 is that: a flexible rubber is provided on the side of the plugging and sealing member away from the end sealing plate of the sealing connection cylinder, and the first split sealing portion is provided on the flexible rubber. The flexible rubber comprises two materials with different hardnesses, the relatively harder materials are on both sides, and the relatively softer material is in the middle. Specifically, the harder material is water-swellable rubber.

[0035] During the construction of Embodiment 1, a relatively large force is required to connect the bolt of the end sealing plate and the bolt connecting column of the sealing connection plate through a nut to ensure the abutting seal of the annular sealing ring, the first split sealing portion, and the second split sealing portion. Due to the lack of a flexible body, misaligned abutment is likely to occur during assembly. Whether it is skewed, deformed, or aged, the sealing effect will still decrease. From the perspective of structural design, neither can the first split sealing portion strongly abut against the inner wall of the water stop casing section, which increases the assembly difficulty and weakens the sealing effect of the annular sealing ring, nor can the size be too small, resulting in too large a gap between the inner wall of the water stop casing section, increasing the difficulty of adaptive seal compensation and thus reducing the combined sealing effect. In this embodiment, by adding flexible rubber, during the assembly process, the insertion section of the plugging and sealing member has an adaptive adjustment space, preventing misaligned abutment and deformation, which would otherwise affect the sealing effect of the annular sealing ring. At the same time, through the preliminary matching and insertion of the first split sealing portion and the second split sealing portion, a primary seal compensation is formed. The overall thickness of the water-swellable rubber on both sides of the flexible rubber accounts for two-thirds of the thickness of the flexible rubber. Under normal circumstances, due to the compressible characteristics of the middle part of the flexible rubber, the end of the insertion section of the plugging and sealing member does not fully abut against the sleeve connection sealing member. This allows construction workers to assemble the two components without using excessive force during on-site construction. When water leaks into the sleeve due to deformation, aging, etc., the water-swellable rubber in the flexible rubber absorbs water and swells, pushing the end of the insertion section further forward to form a secondary seal compensation. The sandwich structure of the water-swellable rubber on both sides of the flexible rubber and the corresponding size design make it easier to push the end of the insertion section forward when being squeezed and when encountering water. When the first split sealing portion absorbs water and swells, it further abuts against the inner wall of the water stop casing section to form a tertiary seal compensation.

[0036] The annular sealing ring is made of corrosion-resistant and aging-resistant materials. The cross-section of the annular sealing ring is trapezoidal or circular to improve the sealing performance and environmental adaptability. Through the design of the anti-corrosion coating and aging-resistant materials in this embodiment, the corrosion resistance is significantly improved, making it suitable for corrosive environments and avoiding the failure of traditional seals due to corrosion or affecting the safe operation of the power system. As an embodiment, the adaptive seal compensation material can also be made of shape memory alloy or pre-compressed elastic material.

[0037] In factory production, the epoxy resin anti-corrosion coating is evenly applied to the surface of the seal by spraying process to ensure the thickness and uniformity of the coating. Corrosion resistance: The service life of the seal is extended through the anti-corrosion coating and anti-aging materials.

[0038] Through the implementation methods and specific examples of the above two embodiments, the technical effects and application values of the prefabricated pipe casing seal for the power cable duct manhole of the present invention are fully demonstrated. Its significant advantages in multiple seals, adaptive seal compensation, corrosion resistance, quick installation and disassembly, etc. provide an efficient and reliable solution for the construction of power cable duct manholes.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the purpose and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. A prefabricated pipe casing seal for an electric power pipe well, characterized in that: It comprises a plugging sealing component and a sleeve connection sealing component; the plugging sealing component comprises an end sealing plate, a sealing connection tube is provided in the middle of the end sealing plate, a card groove is provided on the outer wall of the sealing connection tube, and an annular sealing ring is assembled in the card groove; a plurality of connecting holes are provided on the edge of the end sealing plate; the sleeve connection sealing component comprises a sleeve connection section, a water-stop sleeve section and a plugging connection sleeve section which are connected in sequence, a connecting plate is provided on the outer side of the connection area between the water-stop sleeve section and the plugging connection sleeve section, a snap structure and a preset incision for conveniently breaking the connecting plate are provided on the connecting plate; a plurality of water-stopping threads and water-stopping baffles are provided on the outer wall of the water-stop sleeve section for enhancing the water-stopping performance; the plugging connection sleeve section comprises a trumpet-shaped access section matching the sealing connection tube, one end of the trumpet-shaped access section is connected to the water-stop sleeve section, and a sealing connection plate is provided on the outer edge of the other end; a plurality of bolt connecting columns are provided on the sealing connection plate at the connection hole position corresponding to the end sealing plate for fixed connection.

2. The prefabricated pipe casing seal for electric power pipe well according to claim 1, characterized in that: The plugging and sealing component is provided with a flexible rubber on a side of the sealing connection tube away from the end sealing plate.

3. The prefabricated pipe casing seal for electric power pipe manhole according to claim 1 or 2, characterized in that: The blocking sealing component is provided with a first split sealing portion on the side of the sealing connection tube away from the end sealing plate or on the flexible rubber, and the sleeve connection sealing component is provided with a second split sealing portion on the side of the water-stop sleeve section close to the trumpet-shaped access section; the first split sealing portion and the second split sealing portion both include a plurality of circumferentially staggered sealing units; the sealing unit of the first split sealing portion and the sealing unit of the second split sealing portion can be matched and plugged to form a multiple combined sealing structure.

4. The prefabricated pipe casing seal for electric power pipe well according to claim 3, characterized in that: The sealing unit of the flexible rubber and / or the first split sealing part includes an adaptive sealing compensation material, and the sealing unit of the second split sealing part is a sealing guide groove or includes an adaptive sealing compensation material; the adaptive sealing compensation material includes one of water-swellable rubber, memory alloy or pre-compressed elastic material, which is used to automatically compensate for the sealing gap during the sealing process to improve the sealing reliability.

5. The prefabricated pipe casing seal for electric power pipe manhole according to claim 1, characterized in that: A plurality of reinforcing support plates are arranged in the sealing connection tube, and the reinforcing support plates are connected to the end sealing plates, and both ends of at least one of the reinforcing support plates are connected to the inner wall of the sealing connection tube, so as to prevent the sealing connection tube from deforming when under pressure and ensure the sealing stability.

6. The prefabricated pipe casing seal for electric power pipe well according to claim 1, characterized in that: The plugging connection sleeve section at least includes a sleeve connection section and a sleeve connection sealing section; the inner diameter of the sleeve connection section is larger than the inner diameter of the sleeve connection sealing section; on the inner wall between the sleeve connection section and the sleeve connection sealing section, a number of semi-closed and semi-open glue holes are evenly distributed, which are used to accommodate the colloid during the sleeve connection construction and enhance the fixing strength.

7. The prefabricated pipe casing seal for electric power pipe manhole according to claim 5, characterized in that: The diameter of the glue-fixing hole is 2mm-4mm, the depth is no more than 2mm, and the minimum spacing between adjacent glue-fixing holes is no more than the diameter of the glue-fixing hole, so as to ensure uniform filling of the colloid and enhance the connection strength.

8. The prefabricated pipe casing seal for electric power pipe well according to claim 1, characterized in that: The cross section of the annular sealing ring is trapezoidal or circular to improve the sealing performance and environmental adaptability.

9. The prefabricated pipe casing seal for electric power pipe manhole according to claim 1, characterized in that: The cross section of the water-stop baffle is L-shaped or T-shaped, and the water-stop threads are spirally or annularly distributed to enhance the water-stopping effect and prevent water penetration.

10. The prefabricated pipe casing seal for electric power pipe manhole according to claim 1, characterized in that: The bolt connection column is provided with a hexagonal through hole, so that the connection hole between the end sealing plate and the sealing connection plate and the bolt connection column are connected by bolts and nuts to achieve rapid installation and disassembly, thereby improving construction efficiency.

Images