A sewer pipe interface flexible splicing device
Patent Information
- Application Number
- CN202522667257.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-16
- Publication Date
- 2026-10-30
- Estimated Expiration
- 2035-12-16
AI Technical Summary
[0004]然而，当遭遇较大的地基不均匀沉降产生强烈的剪切力时，单纯依靠橡胶圈的摩擦力往往难以维持连接，容易导致管道从套筒中脱出或橡胶圈被挤出，造成密封失效
1.本实用新型的排水管道接口柔性拼接装置，通过在前管节和后管节的横缝和内缝之间设置第一密封圈，实现第一层防水，并提供震动或热胀冷缩的余量，并通过在前管节和后管节的外缝处设置第二密封圈，实现第二层防水，并提供震动或热胀冷缩的余量。通过内外双层防水与减震，避免前管节和后管节之间形成刚性连接，使其在轴向和径向都具有一定的震动余量，从而实现两个管节之间的柔性连接，避免发生连接失效或者泄漏的情况。
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Figure CN224919999U_ABST
Abstract
Description
Technical Field
[0001] The embodiments of this utility model belong to the field of drainage pipe technology, and more specifically, relate to a flexible splicing device for drainage pipe interfaces. Background Technology
[0002] Because drainage pipes are typically buried underground and have long routes, they are highly susceptible to changes in geological conditions, vibrations from surface traffic loads, and thermal expansion and contraction due to seasonal temperature differences during long-term use. Traditional rigid connections lack sufficient buffering and adaptability when faced with such pipe displacement or deformation, easily leading to joint cracking and misalignment, which can result in sewage leakage polluting groundwater and soil, or groundwater infiltration increasing the load on sewage treatment plants. Therefore, to improve the reliability of pipe network operation, flexible splicing devices for drainage pipe joints, capable of accommodating certain angular deflections and axial displacements, have emerged. These devices ensure sealing while allowing for moderate relative movement of the pipes, making them a key component of modern municipal engineering.
[0003] In existing technologies, common flexible splicing of drainage pipes typically employs socket-type rubber ring interfaces or sleeve-type connectors. Taking a typical sleeve-type flexible splicing device as an example, its main structure includes a cylindrical metal sleeve, annular rubber seals at both ends of the sleeve, and a set of fastening bolts for locking the sleeve. During installation, the construction workers align the ends of the two pipes to be connected and insert them into the sleeve, positioning the rubber seals between the outer wall of the pipe and the inner wall of the sleeve. Then, by tightening the bolts with a wrench, the sleeve diameter is reduced or the gland is compressed, forcing the rubber rings to elastically deform and thus forming a seal tightly against the pipe wall. This structure, to some extent, solves the problem of rigid interfaces being prone to breakage, is relatively quick to construct, and possesses a certain degree of seismic resistance.
[0004] However, when encountering significant uneven settlement of the foundation generating strong shear forces, the friction of the rubber ring alone is often insufficient to maintain the connection. This can easily lead to the pipe detaching from the sleeve or the rubber ring being squeezed out, resulting in seal failure. In confined trench working spaces or when the pipe itself has ellipticity deviations, the fastening bolts cannot guarantee uniform stress around the perimeter, leading to insufficient or excessive local compression of the rubber ring, creating a weak link effect and causing leakage. Furthermore, existing metal sleeves and fasteners, constantly exposed to humid and corrosive underground environments, are prone to corrosion and failure, making subsequent maintenance difficult and shortening the lifespan of the equipment. Utility Model Content
[0005] To address the aforementioned deficiencies or improvement needs of existing technologies, this utility model provides a flexible splicing device for drainage pipe interfaces. A first sealing ring is installed between the transverse and inner seams of the front and rear pipe sections to achieve a first layer of waterproofing and provide allowance for vibration or thermal expansion and contraction. A second sealing ring is installed at the outer seam of the front and rear pipe sections to achieve a second layer of waterproofing and provide allowance for vibration or thermal expansion and contraction. Through this double-layer waterproofing and vibration damping, a rigid connection between the front and rear pipe sections is avoided, ensuring sufficient vibration allowance in both the axial and radial directions. This achieves a flexible connection between the two pipe sections, preventing connection failure or leakage.
[0006] To achieve the above objectives, this utility model provides a flexible splicing device for drainage pipe interfaces, including a locking clamp and a second sealing ring; The locking clamp includes a first clamping clamp and a second clamping clamp, with a gap between the first clamping clamp and the second clamping clamp, and the first clamping clamp is located on the front pipe section and the second clamping clamp is located on the rear pipe section; A second sealing ring is provided between the first clamping clamp and the second clamping clamp. The two ends of the second sealing ring are respectively below the first clamping clamp and the second clamping clamp, and are pressed by the first clamping clamp and the second clamping clamp. An inner pressure ring protruding inward is provided in the middle of the second sealing ring. The inner pressure ring is in the outer seam of the front pipe section and the rear pipe section, and is squeezed by the front pipe section and the rear pipe section. A first sealing ring is provided between the front pipe section and the rear pipe section. The first sealing ring has an L-shaped single-sided cross-section and includes two parts: a flat ring and a vertical ring, which are respectively located in the inner seam and the transverse seam between the front pipe section and the rear pipe section.
[0007] Furthermore, both the first clamping hoop and the second clamping hoop include two identical half-hoops, each half-hoop having a connecting plate at both ends. The two half-hoops are clamped against the front or rear pipe section and locked between the connecting plates by connecting bolts, thereby clamping the first clamping hoop and the second clamping hoop against the front and rear pipe sections respectively.
[0008] Furthermore, the first clamping hoop and the second clamping hoop have annular notches forming pressure grooves at their opposite positions, and the two ends of the second sealing ring are respectively located in the pressure grooves of the first clamping hoop and the second clamping hoop, and are squeezed and limited by the first clamping hoop and the second clamping hoop at both ends.
[0009] Furthermore, the length of each of the two half-hoops of the first and second clamping hoops is less than half of their circumference, so that when the two half-hoops clamp the front or rear pipe section, there is a gap between the connecting plates at both ends.
[0010] Furthermore, at the connection point between the front and rear pipe sections, there is an inclined diameter reduction at a distance from each other, so that the diameter of the connection point is larger than that of the pipe body, and the first clamping clamp and the second clamping clamp are respectively clamped at the connection point between the front and rear pipe sections. The first clamping clamp and the second clamping clamp have the same inner oblique cut at the inclined diameter change of the front pipe section and the rear pipe section, which fits into the inclined diameter change.
[0011] Furthermore, near one end of the first clamping hoop and the second clamping hoop, there is an outwardly expanding annular bearing plate, and multiple connecting seats are provided at the same position on the two annular bearing plates, each connecting seat having a circular insertion interface.
[0012] Furthermore, the connecting seats at the same position on the first clamping hoop and the second clamping hoop are a pair, and a spring plate is provided between each pair of connecting seats. The spring plate is an elastic metal plate, which is pre-bent into an arc shape in the middle and has round rods at both ends. The round rods at both ends are inserted into the insertion interface of the two pairs of connecting seats.
[0013] Furthermore, the spring plate is in its initial state during installation, where it is naturally bent without being subjected to force.
[0014] In summary, compared with the prior art, the above-described technical solution conceived by this utility model can achieve the following beneficial effects: 1. This utility model discloses a flexible splicing device for drainage pipe interfaces. It achieves a first layer of waterproofing by setting a first sealing ring between the transverse and inner seams of the front and rear pipe sections, providing a margin for vibration or thermal expansion and contraction. A second sealing ring is set at the outer seam of the front and rear pipe sections, achieving a second layer of waterproofing and providing a margin for vibration or thermal expansion and contraction. Through this double-layer waterproofing and vibration damping, a rigid connection between the front and rear pipe sections is avoided, ensuring sufficient vibration margin in both the axial and radial directions. This achieves a flexible connection between the two pipe sections, preventing connection failure or leakage.
[0015] 2. The flexible splicing device for drainage pipe interfaces of this utility model, when the first clamping clamp and the second clamping clamp clamp the front pipe section and the rear pipe section respectively, its inner oblique cut can generate extrusion force on the inclined diameter change outer wall of the front pipe section and the rear pipe section. The extrusion force can be decomposed into radial force and axial force on the front pipe section and the rear pipe section. The axial force will axially press the front pipe section and the rear pipe section together, thereby ensuring a tight connection between the two pipe sections.
[0016] 3. In the flexible splicing device for drainage pipe interfaces of this utility model, when slight displacement or shaking occurs between the front and rear pipe sections, multiple elastic plates deform, thereby applying restoring forces to the front and rear pipe sections. On the one hand, this counteracts external loads; on the other hand, it provides restoring forces to allow both sections to return to their initial state after the load disappears, thus enhancing the stability of the flexible connection between the two pipe sections. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the structure of a flexible splicing device for drainage pipe interfaces according to an embodiment of the present invention; Figure 2 This is a cross-sectional view of a flexible splicing device for drainage pipe interfaces according to an embodiment of the present invention; Figure 3 This is a cross-sectional view of the front and rear pipe sections of a flexible splicing device for drainage pipe interfaces according to an embodiment of the present invention. Figure 4 This is a schematic diagram of the locking structure of a flexible splicing device for drainage pipe interfaces according to an embodiment of the present invention; Figure 5 This is a cross-sectional view of the locking structure of a flexible splicing device for drainage pipe interfaces according to an embodiment of the present invention; Figure 6 This is a schematic diagram of the installation of the spring plate structure of a flexible splicing device for drainage pipe interfaces according to an embodiment of this utility model.
[0018] In all the accompanying drawings, the same reference numerals denote the same technical features, specifically: 1-front pipe section, 2-rear pipe section, 3-first sealing ring, 4-locking clamp, 401-first clamping clamp, 402-second clamping clamp, 403-connecting bolt, 404-connecting seat, 5-second sealing ring, 501-inner pressure ring, 6-spring plate. Detailed Implementation
[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the present utility model and are not intended to limit the present utility model. Furthermore, the technical features involved in the various embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.
[0020] This utility model discloses a flexible splicing device for drainage pipe interfaces, located between a front pipe section 1 and a rear pipe section 2, for connecting the two sections. The connection between the front pipe section 1 and the rear pipe section 2 using this flexible splicing device is an insertion joint. Specifically, the inner ring of the front pipe section 1 extends forward to form a boss, and the outer ring of the rear pipe section 2 extends forward to form a groove. The boss of the front pipe section 1 extends into the groove of the rear pipe section 2 to form an insertion joint. The outer diameter of the boss is smaller than the inner diameter of the groove, and a gap is provided between the boss and the groove, thereby creating a gap at the connection between the front pipe section 1 and the rear pipe section 2, including an outer gap, a transverse gap, and an inner gap.
[0021] like Figure 1-3As shown, this utility model embodiment provides a flexible splicing device for drainage pipe interfaces, including a locking clamp 4 and a second sealing ring 5. The locking clamp 4 includes a first clamping clamp 401 and a second clamping clamp 402, with a gap between the first clamping clamp 401 and the second clamping clamp 402. The first clamping clamp 401 is located on the front pipe section 1, and the second clamping clamp 402 is located on the rear pipe section 2. A second sealing ring 5 is provided between the first clamping clamp 401 and the second clamping clamp 402. The two ends of the second sealing ring 5 are respectively below the first clamping clamp 401 and the second clamping clamp 402 and are pressed by the first clamping clamp 401 and the second clamping clamp 402. An inner pressure ring 501 protruding inward is provided in the middle of the second sealing ring 5. The inner pressure ring 501 is located in the outer seam of the front pipe section 1 and the rear pipe section 2 and is squeezed by the front pipe section 1 and the rear pipe section 2. A first sealing ring 3 is provided between the front pipe section 1 and the rear pipe section 2. The first sealing ring 3 has an L-shaped cross-section and includes a flat ring and a vertical ring, which are respectively located in the inner seam and the transverse seam between the front pipe section 1 and the rear pipe section 2. Both the first sealing ring 3 and the second sealing ring 5 are made of rubber. By setting the first sealing ring 3 between the transverse seam and the inner seam of the front pipe section 1 and the rear pipe section 2, a first layer of waterproofing is achieved, and a margin for vibration or thermal expansion and contraction is provided. By setting the second sealing ring 5 at the outer seam of the front pipe section 1 and the rear pipe section 2, a second layer of waterproofing is achieved, and a margin for vibration or thermal expansion and contraction is provided. Through double-layer waterproofing and vibration damping, a rigid connection is avoided between the front pipe section 1 and the rear pipe section 2, giving it a certain vibration margin in both the axial and radial directions. This achieves a flexible connection between the two pipe sections, preventing connection failure or leakage.
[0022] like Figure 4 , 5 As shown, both the first clamping clamp 401 and the second clamping clamp 402 include two identical half-clamps. Each half-clamp has a connecting plate at both ends. The two half-clamps are clamped against the front pipe section 1 or the rear pipe section 2, and are locked between the connecting plates by connecting bolts 403, so that the first clamping clamp 401 and the second clamping clamp 402 clamp the front pipe section 1 and the rear pipe section 2 respectively. The first clamping clamp 401 and the second clamping clamp 402 have annular notches forming pressure grooves at their facing positions. The two ends of the second sealing ring 5 are respectively located in the pressure grooves of the first clamping clamp 401 and the second clamping clamp 402, and are squeezed and limited by the first clamping clamp 401 and the second clamping clamp 402 at both ends.
[0023] As a further preferred embodiment, the length of each of the two half-hoops of the first clamping hoop 401 and the second clamping hoop 402 is less than half of its circumference, so that when the two half-hoops clamp the front pipe section 1 or the rear pipe section 2, there is a gap between the connecting plates at both ends, thereby achieving better clamping of the pipe section.
[0024] As a further preferred embodiment, vibration isolation rings are bonded to the inner rings of the first clamping clamp 401 and the second clamping clamp 402 to prevent slippage between the clamping clamp 4 and the two pipe sections.
[0025] At the connection point between the front pipe section 1 and the rear pipe section 2, there is an inclined diameter change at a distance from each other, so that the diameter of the connection point is larger than that of the pipe body. The first clamping clamp 401 and the second clamping clamp 402 are respectively clamped at the connection point between the front pipe section 1 and the rear pipe section 2. The first clamping clamp 401 and the second clamping clamp 402 have the same inner oblique cut at the inclined diameter change point of the front pipe section 1 and the rear pipe section 2, which fits against the inclined diameter change point.
[0026] It is understandable that when the first clamping clamp 401 and the second clamping clamp 402 clamp the front pipe section 1 and the rear pipe section 2 respectively, their inner oblique cuts can generate extrusion force on the inclined diameter-changing outer wall of the front pipe section 1 and the rear pipe section 2. This extrusion force can be decomposed into radial force and axial force on the front pipe section 1 and the rear pipe section 2. The axial force will axially press the front pipe section 1 and the rear pipe section 2 together, thereby ensuring a tight connection between the two pipe sections.
[0027] like Figure 6 As shown, near one end of the first clamping hoop 401 and the second clamping hoop 402, there is an outwardly expanding annular bearing plate. Multiple connecting seats 404 are located at the same position on both annular bearing plates, and each connecting seat 404 has a circular insertion interface. The connecting seats 404 at the same position on the first clamping hoop 401 and the second clamping hoop 402 form a pair. Between each pair of connecting seats 404 is a spring plate 6. The spring plate 6 is an elastic metal plate, pre-bent into an arc shape in the middle, with round rods at both ends. The round rods at both ends are inserted into the insertion interfaces of the paired connecting seats 404.
[0028] It should be noted that when the elastic plate 6 is installed, it is in its initial state and is naturally bent without any force. When it is subjected to tension, the degree of bending decreases, and when it is subjected to pressure, the degree of bending increases, thereby generating elasticity.
[0029] As a further preferred embodiment, at least four connecting seats 404 are provided, evenly distributed on the first clamping hoop 401 and the second clamping hoop 402, with two pairs of connecting seats 404 at opposite corners forming a cross shape.
[0030] Understandably, when slight displacement or swaying occurs between the front pipe section 1 and the rear pipe section 2, multiple spring plates 6 deform, thereby applying restoring forces to the front pipe section 1 and the rear pipe section 2. On the one hand, this counteracts external loads; on the other hand, it provides restoring forces to allow both sections to return to their initial state after the load disappears, thus enhancing the stability of the flexible connection between the two pipe sections.
[0031] Those skilled in the art will readily understand that the above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A flexible splicing device for drainage pipe interfaces, characterized in that, Including the locking clamp (4) and the second sealing ring (5); The locking clamp (4) includes a first clamping clamp (401) and a second clamping clamp (402), with a gap between the first clamping clamp (401) and the second clamping clamp (402), and the first clamping clamp (401) is located on the front pipe section (1), and the second clamping clamp (402) is located on the rear pipe section (2); A second sealing ring (5) is provided between the first clamping clamp (401) and the second clamping clamp (402). The two ends of the second sealing ring (5) are respectively below the first clamping clamp (401) and the second clamping clamp (402) and are pressed by the first clamping clamp (401) and the second clamping clamp (402). An inner pressure ring (501) protruding inward is provided in the middle of the second sealing ring (5). The inner pressure ring (501) is in the outer seam of the front pipe section (1) and the rear pipe section (2) and is squeezed by the front pipe section (1) and the rear pipe section (2). A first sealing ring (3) is provided between the front pipe section (1) and the rear pipe section (2). The single-sided cross section of the first sealing ring (3) is L-shaped, including two parts: a flat ring and a vertical ring, which are respectively located in the inner seam and the transverse seam between the front pipe section (1) and the rear pipe section (2).
2. The flexible splicing device for drainage pipe interfaces according to claim 1, characterized in that, The first clamping hoop (401) and the second clamping hoop (402) each include two identical half hoops. Each half hoop has a connecting plate at both ends. The two half hoops are clamped against the front pipe section (1) or the rear pipe section (2) and locked between the connecting plates by connecting bolts (403), so that the first clamping hoop (401) and the second clamping hoop (402) clamp the front pipe section (1) and the rear pipe section (2) respectively.
3. The flexible splicing device for drainage pipe interfaces according to claim 2, characterized in that, The first clamping hoop (401) and the second clamping hoop (402) have annular notches forming pressure grooves at their opposite positions. The two ends of the second sealing ring (5) are respectively located in the pressure grooves of the first clamping hoop (401) and the second clamping hoop (402), and are squeezed and limited by the first clamping hoop (401) and the second clamping hoop (402) at both ends.
4. The flexible splicing device for drainage pipe interfaces according to claim 3, characterized in that, The length of each of the two halves of the first clamping clamp (401) and the second clamping clamp (402) is less than half of its circumference, so that when the two halves clamp the front pipe section (1) or the rear pipe section (2), there is a gap between the connecting plates at both ends.
5. A flexible splicing device for drainage pipe interfaces according to any one of claims 1-4, characterized in that, At the connection point of the front pipe section (1) and the rear pipe section (2), there is an inclined diameter change at the opposite distance, so that the diameter of the connection point is larger than that of the pipe body. The first clamping clamp (401) and the second clamping clamp (402) are respectively clamped at the connection point of the front pipe section (1) and the rear pipe section (2). The first clamping clamp (401) and the second clamping clamp (402) have the same inner oblique cut at the inclined diameter change of the front pipe section (1) and the rear pipe section (2), which fits with the inclined diameter change.
6. A flexible splicing device for drainage pipe interfaces according to claim 5, characterized in that, Near one end of the first clamping hoop (401) and the second clamping hoop (402), there is an outwardly expanding annular bearing plate. Multiple connecting seats (404) are provided at the same position on the two annular bearing plates, and each connecting seat (404) is provided with a circular insertion interface.
7. A flexible splicing device for drainage pipe interfaces according to claim 6, characterized in that, The first clamping hoop (401) and the second clamping hoop (402) have a pair of connecting seats (404) at the same position. Each pair of connecting seats (404) has a spring plate (6) between them. The spring plate (6) is an elastic metal plate with a pre-bent bow shape in the middle and round rods at both ends. The round rods at both ends are inserted into the insertion interface of the pair of connecting seats (404).
8. A flexible splicing device for drainage pipe interfaces according to claim 7, characterized in that, When the spring plate (6) is installed, it is in its initial state and is naturally bent without any force.