Sealing connection device for sludge discharge pipeline of water plant
By using a connecting threaded sleeve assembly and a fixing assembly with a limiting groove and a convex ring in the sludge discharge pipeline of the water plant, the problem of loosening and leakage of the sealing connection device under dynamic conditions was solved, and a highly efficient dynamic sealing effect was achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-19
- Publication Date
- 2026-03-20
AI Technical Summary
Existing sealing connections for sludge discharge pipes in water plants are prone to loosening, wear, and leakage under dynamic conditions, resulting in poor sealing performance.
The connecting threaded sleeve assembly and fixing assembly, which use a limiting groove and a convex ring in the connecting pipe, improve the sealing performance through a multi-constraint structure, including misaligned groove and convex design, guide surface guidance, annular groove limiting and deformable wing ring, etc., to form multiple constraints to prevent loosening and leakage.
It effectively improves the dynamic sealing effect at the connection of the sludge discharge pipeline in the water plant, reduces the risk of pipeline leakage, and has a compact structure that is adaptable to vibration and pressure fluctuations.
Smart Images
Figure CN224017920U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to pipeline sealing technical field, specifically, relate to a water plant sludge pipeline sealing connecting device. BACKGROUND
[0002] In the sludge pipeline system of water plant, because conveying medium contains a large number of silt particles and exists pressure fluctuation, the sealing reliability of pipeline connection place directly influences operating efficiency.
[0003] At present, the main sealing connecting device is mainly flange bolt connection, rubber ring bearing plug connection and thread locking connection, wherein, flange bolt connection adopts flange butt joint structure, realizes sealing by bolt compression middle gasket, but the structure is prone to bolt loosening in long-term operation, leading to pre-tightening force drop, at the same time, flange end face is washed by slurry and can produce wear groove, causes sealing gasket and flange not to be close contact, and interface leakage is caused;Rubber ring bearing plug connection is embedded O-shaped sealing ring through bearing plug structure, realizes sealing by interference fit, but with the increase of use time, O-shaped sealing ring is prone to aging and hardening, leading to elasticity drop, reduces sealing effect;Thread locking connection adopts taper thread screwing connection, relies on thread engagement and realizes sealing, but because sludge pipeline contains a large number of silt particles and exists pressure fluctuation, thread pair is prone to loosening, leading to fit clearance increase, thereby pipe leakage occurs.
[0004] Overall, the dynamic sealing effect of the existing sealing connecting device is poor, pipe leakage occurs easily, and improvement is needed. INVENTION CONTENTS
[0005] The utility model aims at providing a water plant sludge pipeline sealing connecting device, which can effectively improve the reliability of dynamic sealing of the pipeline and reduce the risk of pipe leakage.
[0006] The utility model realizes the following technical scheme: a water plant sludge pipeline sealing connecting device is used for connecting a first pipeline and a second pipeline, and comprises:
[0007] A connecting pipe is internally symmetrical to form a first limiting groove and a second limiting groove, and the first limiting groove and the second limiting groove are used for tightly abutting with the end faces of the first pipeline and the second pipeline respectively;
[0008] A convex ring is sleeved on the middle part of the connecting pipe;
[0009] A connecting screw assembly comprises a first screw sleeve and a second screw sleeve in end thread cooperation, and the threaded ends of the first screw sleeve and the second screw sleeve are in tight abutment with the convex ring;
[0010] A fixing assembly is sleeved outside the first screw sleeve and the second screw sleeve and is used for fixing the first screw sleeve and the second screw sleeve on the connecting pipe.
[0011] Furthermore, the two sides of the convex ring are respectively provided with a first groove and a second groove, the first groove and the second groove are staggered, and the threaded ends of the first threaded sleeve and the second threaded sleeve are respectively provided with a first protrusion and a second protrusion that are adapted to the first groove and the second groove.
[0012] Furthermore, both the first and second grooves are provided with inclined guide surfaces inside.
[0013] Furthermore, a first boss and a second boss are respectively provided on both sides of the convex ring. The first boss is located above the first groove, and the second boss is located below the second groove. The threaded ends of the first threaded sleeve and the second threaded sleeve are respectively provided with a first annular groove and a second annular groove that are adapted to the first boss and the second boss.
[0014] Furthermore, the outer diameter of the connecting pipe is linearly and gradually increases from both ends to the middle.
[0015] Furthermore, both ends of the connecting pipe are provided with deformable wing rings, which are inclined from the ends of the connecting pipe toward the middle.
[0016] Furthermore, both the non-threaded ends of the first and second threaded sleeves are provided with inner flanges, and the two inner flanges abut against the side walls of the first and second pipes, respectively.
[0017] Furthermore, the fixing assembly includes a first clamp, a second clamp, and a third clamp. The first clamp is sleeved on the outer periphery of the non-threaded end of the first threaded sleeve, the second clamp is sleeved on the outer periphery of the non-threaded end of the second threaded sleeve, and the third clamp is sleeved on the outer periphery of the threaded ends of the first and second threaded sleeves.
[0018] Furthermore, the first, second, and third pipe clamps each include two symmetrical semi-circular clamp bodies, which are detachably connected by a bolt assembly.
[0019] Furthermore, reinforcing ribs are provided between the middle part of the convex ring and the groove walls of the first and second limiting grooves.
[0020] As can be seen from the above, this application achieves a tight abutment between the first limiting groove and the second limiting groove in the connecting pipe and the first pipe and the second pipe respectively. Combined with the locking of the connecting threaded sleeve assembly and the convex ring, and with the fixing assembly, multiple constraints are formed, thereby effectively improving the dynamic sealing effect at the connection between the first pipe and the second pipe, avoiding pipe leakage. The structure is compact and highly practical. Attached Figure Description
[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0022] Figure 2 is a partial exploded view of the utility model;
[0023] Figure 3 is a whole cross-sectional view of the utility model;
[0024] Figure 4 is a cross-sectional view of the utility model after removing the first pipeline and the second pipeline;
[0025] Figure 5 is a schematic view for reflecting the positional relationship between the first screw sleeve, the second screw sleeve and the convex ring in the utility model;
[0026] Figure 6 is a partial display view of the utility model Figure 5 ;
[0027] Figure 7 is a display view of the connecting sleeve in the utility model.
[0028] The drawings show that: 10, connecting pipe; 11, first limiting groove; 12, second limiting groove; 13, deformed wing ring; 20, convex ring; 21, first recess; 22, second recess; 23, first boss; 24, second boss; 30, connecting screw sleeve assembly; 31, first screw sleeve; 311, first convex part; 312, first annular groove; 32, second screw sleeve; 321, second convex part; 322, second annular groove; 33, inner flange; 40, fixing assembly; 401, semicircular hoop body; 402, bolt assembly; 403, elastic abutting pad; 41, first pipe clamp; 42, second pipe clamp; 43, third pipe clamp; 50, reinforcing rib; 200, first pipeline; 300, second pipeline. DETAILED DESCRIPTION
[0029] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be described clearly and completely below in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. The components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.
[0030] Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the claimed utility model, but only represents selected embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model. EMBODIMENT
[0031] The following refers to Figures 1-7As shown, further illustrated in combination with the specific embodiments, the embodiment provides a sealing connecting device for connecting a first pipeline 200 and a second pipeline 300, which comprises a connecting pipe 10, a convex ring 20, a connecting screw sleeve assembly 30 and a fixing assembly 40. The connecting pipe 10 is internally provided with a first limiting groove 11 and a second limiting groove 12 formed symmetrically. The first limiting groove 11 and the second limiting groove 12 are respectively located on both sides of the middle part of the connecting pipe 10, and are respectively used for tightly abutting the end faces of the first pipeline 200 and the second pipeline 300. The convex ring 20 is sleeved on the middle part of the connecting pipe 10. In the embodiment, the convex ring 20 is integrally formed with the connecting sleeve 10.
[0032] The connecting screw sleeve assembly 30 is sleeved on the outer periphery of the connecting pipe 10 and the convex ring 20, and comprises a first screw sleeve 31 and a second screw sleeve 32 threadedly matched at the ends. The two ends of the first screw sleeve 31 and the second screw sleeve 32 are respectively a threaded end and a non-threaded end. The threaded ends of the first screw sleeve 31 and the second screw sleeve 32 are screwed onto the outer periphery of the convex ring 20, so as to tightly abut the convex ring 20.
[0033] The fixing assembly 40 is sleeved on the outside of the first screw sleeve 31 and the second screw sleeve 32, and is used for fixedly connecting the first screw sleeve 31 and the second screw sleeve 32 to the connecting pipe 10, so as to fix the first screw sleeve 31 and the second screw sleeve 32.
[0034] During connection, the first pipeline 200 and the second pipeline 300 are respectively inserted into the inside of the connecting pipe 10 from both ends of the connecting pipe 10. The end faces of the first pipeline 200 and the second pipeline 300 are respectively tightly fitted with the first limiting groove 11 and the second limiting groove 12, forming an initial sealing interface. The first screw sleeve 31 and the second screw sleeve 32 are screwed to both sides of the convex ring 20, so as to tightly press the end faces of the first pipeline 200 and the second pipeline 300 into the first limiting groove 11 and the second limiting groove 12. Finally, the first screw sleeve 31 and the second screw sleeve 32 are fixed on the connecting pipe 10 by the fixing assembly 40, forming multiple constraints, preventing the threaded ends of the first screw sleeve 31 and the second screw sleeve 32 from loosening in a vibrating environment, so as to improve the dynamic sealing effect of the first pipeline 200 and the second pipeline 300, and reduce the risk of pipeline leakage.
[0035] Further, the two sides of the convex ring 20 are respectively provided with a first recess 21 and a second recess 22. The first recess 21 and the second recess 22 are arranged in a staggered manner. The threaded ends of the first screw sleeve 31 and the second screw sleeve 32 are respectively provided with a first convex part 311 and a second convex part 321 matched with the first recess 21 and the second recess 22.
[0036] When the first and second threaded sleeves 31 and 32 are screwed on the connecting pipe 10 and screwed with each other, the first and second protrusions 311 and 321 on the threaded ends of the first and second threaded sleeves 31 and 32 are respectively embedded in the first and second recesses 21 and 22 on both sides of the protruding ring 20. During installation, the first protrusion 311 and the first recess 21, the second protrusion 321 and the second recess 22 cooperate to limit the rotational freedom of the first and second threaded sleeves 31 and 32 relative to the protruding ring 20, preventing the first and second pipes 200 and 300 from loosening due to vibration or pressure fluctuations in the conveying medium. The first and second recesses 21 and 22 and the first and second protrusions 311 and 321 are distributed in a staggered manner and form multi-point constraints in the circumferential direction, making the stress distribution of the first and second threaded sleeves 31 and 32 more uniform and avoiding unilateral stress concentration that can cause structural deformation.
[0037] Further, the first and second recesses 21 and 22 are each provided with an inclined guide surface (not shown in the figure). Correspondingly, the first and second protrusions 311 and 321 are each provided with a bevel surface that cooperates with the guide surface.
[0038] When the threaded ends of the first and second threaded sleeves 31 and 32 approach the protruding ring 20, the first and second protrusions 311 and 321 first come into contact with the guide surfaces of the first and second recesses 21 and 22. With the screwing action, the guide surfaces guide the first and second protrusions 311 and 321 to gradually move along the bevel surfaces to the bottoms of the first and second recesses 21 and 22, forcing the first and second threaded sleeves 31 and 32 to displace axially, thereby enhancing the abutting force of the threaded ends of the first and second threaded sleeves 31 and 32 against the first and second protruding rings 20.
[0039] Further, the protruding ring 20 is provided with first and second protruding bosses 23 and 24 on both sides, with the first protruding boss 23 located above the first recess 21 and the second protruding boss 24 located below the second recess 22. The threaded ends of the first and second threaded sleeves 31 and 32 are respectively provided with first and second annular grooves 312 and 322 that are adapted to the first and second protruding bosses 23 and 24.
[0040] When the first and second threaded sleeves 31 and 32 are screwed, the first and second annular grooves 312 and 322 on the threaded ends of the first and second threaded sleeves 31 and 32 respectively abut against the first and second protruding bosses 23 and 24 on both sides of the protruding ring 20, cooperating with the first and second protruding rings 20 and the first and second recesses 21 and 22 to achieve bidirectional positioning of the first and second threaded sleeves 31 and 32, further improving the fitting precision of the first and second threaded sleeves 31 and 32 with the protruding ring 20, and preventing the first and second threaded sleeves 31 and 32 from axially shifting due to pipe vibration or pressure impact.
[0041] Further, the outer diameter of the connecting pipe 10 is linearly and gradually expanded from both ends to the middle.
[0042] The outer diameter of the two ends of the connecting pipe 10 is small, which facilitates the alignment and positioning of the ends of the first pipe 200 and the second pipe 300 during installation. The wall thickness of the connecting pipe 10 gradually increases as the outer diameter linearly expands towards the middle, forming a symmetrical tapered transition section. When subjected to internal mud pressure, the gradually expanding structure guides the stress to be evenly distributed along the pipe wall through geometric continuity, avoiding structural deformation caused by local stress concentration.
[0043] Further, the two ends of the connecting pipe 10 are provided with deformation wing rings 13, which are inclined from the ends of the connecting pipe 10 to the middle.
[0044] In this embodiment, the two ends of the connecting pipe 10 are provided with four deformation wing rings 13. The deformation wing rings 13 are initially inclined from the ends of the connecting pipe 10 to the middle, and when the first screw sleeve 31 and the second screw sleeve 32 are sleeved on the connecting pipe 10 and tightened, the deformation wing rings 13 are flattened, so that the first screw sleeve 31 and the second screw sleeve 32 are in close abutment with the connecting pipe 10.
[0045] Further, the non-threaded ends of the first screw sleeve 31 and the second screw sleeve 32 are provided with inner flanges 33, and the two inner flanges 33 respectively abut against the side walls of the first pipe 200 and the second pipe 300.
[0046] The inner flange 33 refers to an annular flange structure extending inwardly from the non-threaded end of the first screw sleeve 31 and the second screw sleeve 32. During installation, the annular contact surface of the inner flange 33 forms an annular limiting structure with the outer wall of the pipe, limiting the non-threaded end of the first screw sleeve 31 and the second screw sleeve 32, thereby limiting the axial displacement of the first screw sleeve 31 and the second screw sleeve 32, and improving the stability of the connection between the first screw sleeve 31 and the second screw sleeve 32 and the connecting pipe 10.
[0047] Further, the fixing assembly 40 includes a first pipe clamp 41, a second pipe clamp 42, and a third pipe clamp 43. The first pipe clamp 41 is sleeved on the outer periphery of the non-threaded end of the first screw sleeve 31, the second pipe clamp 42 is sleeved on the outer periphery of the non-threaded end of the second screw sleeve 32, and the third pipe clamp 43 is sleeved on the outer periphery of the threaded end of the first screw sleeve 31 and the second screw sleeve 32.
[0048] When the first screw sleeve 31 and the second screw sleeve 32 are tightened, the first pipe clamp 41 and the second pipe clamp 42 are locked on the non-threaded ends of the first screw sleeve 31 and the second screw sleeve 32 respectively, thereby restricting the relative displacement of the first screw sleeve 31 and the second screw sleeve 32 and the connecting pipe 10. The third pipe clamp 43 wraps the threaded joint of the first screw sleeve 31 and the second screw sleeve 32 (the threaded end of the first screw sleeve 31 and the second screw sleeve 32 has been tightened into a threaded joint), thereby preventing the loosening of the threaded pair due to vibration.
[0049] Specifically, the first pipe clamp 41, the second pipe clamp 42 and the third pipe clamp 43 each include two symmetrical semicircular clamp bodies 401 which are detachably connected through a bolt assembly 402.
[0050] The two semicircular clamp bodies 401 are respectively placed at the non-threaded ends of the first and second threaded sleeves 31 and 32 and the outer periphery of the threaded ends of the first and second threaded sleeves 31 and 32, and the semicircular clamp bodies 401 are closed and locked through the bolt assembly 402 to form a circumferential constraint on the first and second threaded sleeves 31 and 32. The split pipe clamp structure can adapt to the installation requirements of different pipe diameters, and the pre-tightening force of the bolt assembly 402 can prevent the pipe clamp from loosening and falling off when the pipeline vibrates or the pressure fluctuates.
[0051] In addition, to avoid damage to the first and second threaded sleeves 31 and 32, the inner side of the semicircular clamp body 401 of the first, second and third pipe clamps 41, 42 and 43 is provided with an elastic abutting pad 403.
[0052] Further, the middle part of the convex ring 20, the groove walls of the first and second limiting grooves 11 and 12 are each provided with a reinforcing rib 50. In the embodiment, the reinforcing rib 50 on the middle part of the convex ring 20 is integrally formed with the reinforcing ribs 50 between the groove walls of the first and second limiting grooves 11 and 12. Through the arrangement of the reinforcing rib 50, the structural strength between the convex ring 20, the first and second limiting grooves 11 and 12 can be improved, and the convex ring 20, the first and second limiting grooves 11 and 12 are prevented from being deformed due to extrusion, and the sealing effect is further improved.
[0053] The above is only a preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.
Claims
1. A sealing connection device for a sludge discharge pipe in a water plant, used to connect a first pipe (200) and a second pipe (300), characterized in that, include: The connecting pipe (10) has a first limiting groove (11) and a second limiting groove (12) symmetrically formed inside. The first limiting groove (11) and the second limiting groove (12) are respectively used to tightly abut against the end faces of the first pipe (200) and the second pipe (300). A convex ring (20) is fitted onto the middle part of the connecting pipe (10); The connecting threaded sleeve assembly (30) includes a first threaded sleeve (31) and a second threaded sleeve (32) with end thread engagement, wherein the threaded ends of the first threaded sleeve (31) and the second threaded sleeve (32) are in close contact with the convex ring (20); The fixing component (40) is sleeved on the outside of the first threaded sleeve (31) and the second threaded sleeve (32) and is used to fix the first threaded sleeve (31) and the second threaded sleeve (32) to the connecting pipe (10).
2. The sealing connection device for water plant sludge discharge pipelines according to claim 1, characterized in that, The two sides of the convex ring (20) are respectively provided with a first groove (21) and a second groove (22), the first groove (21) and the second groove (22) are misaligned, and the threaded ends of the first threaded sleeve (31) and the second threaded sleeve (32) are respectively provided with a first protrusion (311) and a second protrusion (321) that are adapted to the first groove (21) and the second groove (22).
3. The sealing connection device for water plant sludge discharge pipelines according to claim 2, characterized in that, The first groove (21) and the second groove (22) are both provided with inclined guide surfaces.
4. The sealing connection device for water plant sludge discharge pipelines according to claim 2, characterized in that, The two sides of the convex ring (20) are respectively provided with a first boss (23) and a second boss (24). The first boss (23) is located above the first groove (21), and the second boss (24) is located below the second groove (22). The threaded ends of the first threaded sleeve (31) and the second threaded sleeve (32) are respectively provided with a first annular groove (312) and a second annular groove (322) that are adapted to the first boss (23) and the second boss (24).
5. The sealing connection device for water plant sludge discharge pipelines according to claim 4, characterized in that, The outer diameter of the connecting pipe (10) is linearly widening from both ends to the middle.
6. The sealing connection device for water plant sludge discharge pipelines according to claim 5, characterized in that, Both ends of the connecting pipe (10) are provided with deformable wing rings (13), which are inclined from the end of the connecting pipe (10) toward the middle.
7. The sealing connection device for water plant sludge discharge pipelines according to claim 6, characterized in that, The non-threaded ends of the first threaded sleeve (31) and the second threaded sleeve (32) are provided with inner flanges (33), and the two inner flanges (33) abut against the side walls of the first pipe (200) and the second pipe (300) respectively.
8. The sealing connection device for water plant sludge discharge pipelines according to claim 1, characterized in that, The fixing component (40) includes a first clamp (41), a second clamp (42) and a third clamp (43). The first clamp (41) is fitted around the non-threaded end of the first threaded sleeve (31), the second clamp (42) is fitted around the non-threaded end of the second threaded sleeve (32), and the third clamp (43) is fitted around the threaded ends of the first threaded sleeve (31) and the second threaded sleeve (32).
9. The sealing connection device for water plant sludge discharge pipelines according to claim 8, characterized in that, The first pipe clamp (41), the second pipe clamp (42) and the third pipe clamp (43) each include two symmetrical semi-circular clamp bodies (401), and the two semi-circular clamp bodies (401) are detachably connected by a bolt assembly (402).
10. The sealing connection device for water plant sludge discharge pipelines according to claim 1, characterized in that, Reinforcing ribs (50) are provided in the middle of the convex ring (20) and between the groove walls of the first limiting groove (11) and the second limiting groove (12).