Helical joint for polyethylene single-wall spiral corrugated pipe

Abstract

The utility model relates to the technical field of bellows joint, especially spiral joint for polyethylene single wall spiral bellows, including two respectively fixed mounting in the joint of bellows both ends, wherein one of the joint surface fixed mounting has first hollow pole, another the joint surface fixed mounting has second hollow pole, wherein one of the joint surface is circularly fixed mounting and has a plurality of round rods, another the joint surface is opened and has annular groove for a plurality of round rods insertion, the annular groove groove wall is circularly opened and has a plurality of through -holes, the through -hole in slide insertion has inserted rod, and one end fixed mounting has clamping plate in the inserted rod in annular groove, the round rod surface is opened and has bayonet for clamping plate card into. The joint realizes preliminary fixation through the thread cooperation of first hollow pole and second hollow pole, and at the same time utilizes a plurality of round rods to insert annular groove, and cooperates clamping plate to form secondary locking to avoid the problem that threaded connection is easy to loosen.

Description

Technical Field

[0001] This utility model relates to the field of corrugated pipe joint technology, and in particular to a spiral joint for polyethylene single-wall spiral corrugated pipe. Background Technology

[0002] Polyethylene single-wall spiral corrugated pipes have been widely used in many fields such as municipal drainage, agricultural irrigation, and industrial wastewater transportation due to their significant advantages such as light weight, corrosion resistance, impact resistance and low cost. The connection quality of these corrugated pipes is directly related to the operational stability of the entire pipeline system, and the performance of the joint, as the core component of the connection, is particularly critical.

[0003] Currently, spiral joints are the most common type of connector used for connecting polyethylene single-wall spiral corrugated pipes on the market. These joints achieve pipe connection through the engagement of internal and external threads, and the operation is relatively simple.

[0004] Existing pipelines vibrate when transporting media. Combined with factors such as soil settlement and thermal expansion and contraction of pipelines due to changes in external temperature, the threaded connection of the spiral joint will gradually loosen over time. Once the joint loosens, it will not only affect the sealing of the pipeline system, leading to media leakage, resource waste and environmental pollution, but in severe cases, it may also cause safety accidents such as pipeline disconnection and collapse, increasing the cost and difficulty of later maintenance. Utility Model Content

[0005] The purpose of this utility model is to solve the following shortcomings in the prior art: the threaded connection of the existing spiral joint is prone to loosening. Once the joint is loose, it will not only affect the sealing of the pipeline system, leading to media leakage, resource waste and environmental pollution, but may also cause safety accidents such as pipeline disconnection and collapse in severe cases, increasing the cost and difficulty of later maintenance. The proposed spiral joint for polyethylene single-wall spiral corrugated pipe is to address these issues.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A spiral joint for a polyethylene single-wall spiral corrugated pipe includes two joints respectively fixedly installed at both ends of the corrugated pipe. A first hollow rod is fixedly installed on the surface of one of the joints, and a second hollow rod for the first hollow rod to enter is fixedly installed on the surface of the other joint. The surface of the first hollow rod is provided with external threads, and the inner wall of the second hollow rod is provided with internal threads.

[0008] One of the connectors has multiple round rods fixedly installed on its circumferential surface, and the other connector has an annular groove on its surface for inserting multiple round rods. The annular groove wall has multiple through-holes in a circumferential shape, and a rod is slidably inserted into each through-hole. A handle is fixedly installed at the outer end of the rod, and an arc-shaped locking plate is fixedly installed at the inner end of the rod. Multiple locking plates abut against each other to form a ring. The locking plates are connected to the annular groove wall through a telescopic component. The end of the round rod away from the connector has an inclined wall, and the surface of the round rod has a slot for the locking plate to engage.

[0009] Preferably, the telescopic component includes a telescopic spring sleeved on the insert rod, with both ends of the telescopic spring fixedly connected to the annular groove wall and the surface of the card plate, respectively.

[0010] Preferably, an annular sleeve is fixedly fitted onto the connector, and the surface of the annular sleeve is provided with multiple rubber protrusions in a circumferential shape.

[0011] Preferably, an annular mounting groove is provided on the surface of the annular sleeve near the second hollow rod, and a limiting component for restricting the movement of multiple insertion rods is provided in the mounting groove.

[0012] Preferably, the limiting component includes multiple spring rods fixedly installed in a circumferential shape in the mounting groove and a limiting cylinder fixedly installed at one end of the multiple spring rods. The limiting cylinder is slidably disposed in the mounting groove, and the inner wall of the limiting cylinder is in slidable contact with the surfaces of the multiple handles.

[0013] Preferably, the surface of the round rod is coated with a smooth coating, which is polytetrafluoroethylene.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] The joint achieves initial fixation through the threaded engagement of the first and second hollow rods. Simultaneously, multiple round rods are inserted into the annular groove, and a locking plate engages with the round rod slots to form a secondary lock, creating a dual fixing structure of threaded connection and snap-lock positioning. This design effectively resists external forces caused by pipeline vibration, soil settlement, and thermal expansion and contraction, avoiding the problem of loosening easily due to a single thread connection in traditional spiral joints. This significantly improves the connection reliability of the pipeline system and reduces the risks of media leakage and pipeline disconnection. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural schematic diagram of the spiral joint for polyethylene single-walled spiral corrugated pipe proposed in this utility model.

[0017] Figure 2 This is a partial three-dimensional structural diagram of the second hollow rod and the joint in this utility model;

[0018] Figure 3 This is a partial three-dimensional structural diagram of the first hollow rod and the joint in this utility model;

[0019] Figure 4 This is a partial three-dimensional structural diagram of the second hollow rod and the joint in this utility model.

[0020] Figure 5 This is a partial three-dimensional structural diagram of the card plate in this utility model;

[0021] Figure 6 This is a three-dimensional structural diagram of the round rod in this utility model;

[0022] Figure 7 for Figure 4 Enlarged view of the structure at point A in the middle.

[0023] In the diagram: 1. Connector, 2. First hollow rod, 3. Second hollow rod, 4. Round rod, 5. Annular groove, 6. Through port, 7. Insert rod, 8. Handle, 9. Clamping plate, 10. Sloping wall, 11. Bayonet, 12. Telescopic spring, 13. Annular sleeve, 14. Mounting groove, 15. Spring rod, 16. Restricting cylinder. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0025] The terms used in this utility model, such as "upper", "lower", "left", "right", "middle" and "one", are only for clarity of description and are not intended to limit the scope of implementation of this utility model. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered as within the scope of implementation of this utility model.

[0026] Reference Figure 1 A spiral joint for a polyethylene single-wall spiral corrugated pipe includes two joints 1 that are fixedly installed at both ends of the corrugated pipe. A first hollow rod 2 is fixedly installed on the surface of one joint 1, and a second hollow rod 3 for the first hollow rod 2 to enter is fixedly installed on the surface of the other joint 1. The surface of the first hollow rod 2 is provided with external threads, and the inner wall of the second hollow rod 3 is provided with internal threads.

[0027] Reference Figures 2-3 One of the connectors 1 has multiple round rods 4 fixedly mounted on its circumferential surface, while the other connector 1 has an annular groove 5 for inserting the multiple round rods 4. Figure 7 As shown, the annular groove 5 has multiple openings 6 circumferentially formed on its wall, such as... Figure 5As shown, a rod 7 is slidably inserted into the opening 6. A handle 8 is fixedly installed at the external end of the rod 7, and an arc-shaped retaining plate 9 is fixedly installed at the internal end of the rod 7 within the annular groove 5. Multiple retaining plates 9 abut against each other to form a ring. The retaining plates 9 are connected to the wall of the annular groove 5 via a telescopic component. The telescopic component includes a telescopic spring 12 sleeved on the rod 7. Both ends of the telescopic spring 12 are fixedly connected to the wall of the annular groove 5 and the surface of the retaining plate 9, respectively. Figure 6 As shown, the end of the round rod 4 away from the joint 1 has an inclined wall 10, and the surface of the round rod 4 has a slot 11 for the clamping plate 9 to be inserted.

[0028] When connecting the bellows, the two connectors 1 that are fixedly installed at both ends of the bellows need to be aligned first. At this time, the connector 1 with the first hollow rod 2 is opposite to the connector 1 with the second hollow rod 3, and the multiple round rods 4 will correspond to the position of the annular groove 5.

[0029] Next, push the two connectors 1 closer together, so that the first hollow rod 2 is gradually screwed into the second hollow rod 3. At the same time, multiple round rods 4 will gradually be inserted into the annular groove 5. During the process of the round rods 4 being inserted into the annular groove 5, the inclined wall 10 of the end of the round rod 4 away from the connector 1 will contact the arc-shaped clamping plate 9 and generate a pushing force on the clamping plate 9. Since the clamping plate 9 is connected to the groove wall of the annular groove 5 through the telescopic component, and the telescopic component is the telescopic spring 12 sleeved on the insertion rod 7, and the two ends of the telescopic spring 12 are fixedly connected to the groove wall of the annular groove 5 and the surface of the clamping plate 9 respectively, under the pushing force of the inclined wall 10, the clamping plate 9 will drive the insertion rod 7 to slide outward along the opening 6, and the telescopic spring 12 will be compressed.

[0030] As the round rod 4 continues to be inserted until the latch 11 on the surface of the round rod 4 moves to the position opposite to the latch plate 9, the telescopic spring 12 is no longer under compression and will return to its original state and push the latch plate 9 to reset, so that the latch plate 9 is locked into the latch 11. At this time, the ring formed by the multiple latch plates 9 abutting each other will firmly fix the round rod 4 in the annular groove 5. At this time, the first hollow rod 2 and the second hollow rod 3 will also be tightened through the threaded engagement, completing the connection and fixation of the bellows.

[0031] When it is necessary to disassemble the bellows, first pull the insert rod 7 by the handle 8 at the outer end of the insert rod 7, so that the insert rod 7 slides outward along the opening 6. The insert rod 7 drives the clamping plate 9 to disengage from the clamping slot 11 of the round rod 4, and at the same time the telescopic spring 12 is compressed.

[0032] Then, rotate the two joints 1 in the opposite direction to gradually loosen the first hollow rod 2 and the second hollow rod 3 through the threaded engagement, and the first hollow rod 2 will exit from the second hollow rod 3.

[0033] Finally, pull the two connectors 1 away from each other, so that the multiple round rods 4 are pulled out from the annular groove 5. Release the handle 8, and the telescopic spring 12 returns to its original state, driving the clamping plate 9 and the insertion rod 7 to reset, thus completing the disassembly of the bellows.

[0034] Reference Figures 2-3 The connector 1 is fixedly fitted with an annular sleeve 13, and the surface of the annular sleeve 13 is provided with multiple rubber protrusions in a circumferential shape.

[0035] When performing the bellows connection operation, the operator holds the annular sleeve 13. At this time, the rubber protrusion can significantly increase the friction between the hand and the annular sleeve 13. When it is necessary to rotate the joint 1 to tighten or loosen the first hollow rod 2 and the second hollow rod 3, the operator can hold the annular sleeve 13 more firmly, avoid hand slippage, and thus complete the rotation operation more easily and efficiently, improving the convenience and stability of connection and disassembly.

[0036] Reference Figure 4 An annular mounting groove 14 is provided on the surface of the annular sleeve 13 near the second hollow rod 3. The mounting groove 14 is provided with a limiting component for restricting the movement of multiple insertion rods 7. The limiting component includes multiple spring rods 15 fixedly installed in the mounting groove 14 in a circumferential shape and a limiting cylinder 16 fixedly installed at one end of the multiple spring rods 15. The limiting cylinder 16 is slidably disposed in the mounting groove 14, and the inner wall of the limiting cylinder 16 is in sliding contact with the surface of multiple handles 8.

[0037] During the connection process of connector 1, when the round rod 4 is inserted into the annular groove 5, the clamping plate 9 is engaged in the bayonet 11 under the action of the telescopic spring 12. At this time, under the elastic force of the spring rod 15, the inner wall of the limiting cylinder 16 maintains sliding contact with the surface of the multiple handles 8. Due to the obstruction of the limiting cylinder 16, the handles 8 cannot pull the insertion rod 7 in the outward direction at will, thereby preventing the insertion rod 7 from driving the clamping plate 9 out of the bayonet 11 in the non-disassembly state, ensuring that the clamping plate 9 is firmly engaged with the round rod 4.

[0038] When it is necessary to disassemble the connector 1, the operator can push the limiting cylinder 16 towards the bottom of the mounting groove 14 to compress the spring rod 15, so that the limiting cylinder 16 slides into the mounting groove 14. At this time, the inner wall of the limiting cylinder 16 separates from the handle 8 and no longer obstructs the handle 8. The operator can then pull the handle 8 to move the insertion rod 7 to perform the disassembly operation.

[0039] During normal use of the pipeline, the spring rod 15 always applies elastic force to the limiting cylinder 16, keeping the limiting cylinder 16 in contact with the handle 8, continuously restricting the accidental movement of the insertion rod 7, further enhancing the stability of the connection of the joint 1, and ensuring that the entire pipeline system will not become loose due to misoperation of the insertion rod 7 during operation.

[0040] The surface of the round rod 4 is coated with a smooth coating, which is polytetrafluoroethylene.

[0041] Polytetrafluoroethylene (PTFE) reduces friction, allowing the round rod 4 to be inserted into the annular groove 5 more smoothly, reducing component wear. It is highly corrosion resistant, protecting the round rod 4 from corrosion by various media. It is resistant to high and low temperatures, adapting to different environments. It also does not stick to impurities, ensuring connection reliability and reducing maintenance costs.

[0042] In this invention, the connector 1 is initially fixed by the threaded engagement of the first hollow rod 2 and the second hollow rod 3. At the same time, multiple round rods 4 are inserted into the annular groove 5, and the locking plate 9 is engaged with the locking slot 11 on the surface of the round rods 4 to form a secondary locking, thus forming a dual fixing structure of threaded connection and snap-lock positioning. This design can effectively resist external forces caused by pipeline vibration, soil settlement and thermal expansion and contraction, avoid the problem of easy loosening of the connector 1 due to a single threaded connection, greatly improve the connection reliability of the pipeline system, and reduce the risks of medium leakage and pipeline disconnection.

[0043] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "connection", "linking", "fixing", etc., should be interpreted broadly.

[0044] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A spiral joint for a polyethylene single-wall spiral corrugated pipe, comprising two joints (1) respectively fixedly installed at both ends of the corrugated pipe, characterized in that, One of the connectors (1) has a first hollow rod (2) fixedly mounted on its surface, and the other connector (1) has a second hollow rod (3) fixedly mounted on its surface for the first hollow rod (2) to enter. The surface of the first hollow rod (2) has an external thread, and the inner wall of the second hollow rod (3) has an internal thread. One of the connectors (1) has multiple round rods (4) fixedly installed on its surface in a circumferential shape. The other connector (1) has an annular groove (5) for inserting multiple round rods (4) on its surface. The annular groove (5) has multiple openings (6) in a circumferential shape on its wall. A rod (7) is slidably inserted into the opening (6). A handle (8) is fixedly installed at the outer end of the rod (7). An arc-shaped clamping plate (9) is fixedly installed at the inner end of the rod (7) in the annular groove (5). Multiple clamping plates (9) abut against each other to form a ring. The clamping plate (9) is connected to the wall of the annular groove (5) through a telescopic component. An inclined wall (10) is opened at the end of the round rod (4) away from the connector (1). A slot (11) for the clamping plate (9) to be inserted is opened on the surface of the round rod (4).

2. The spiral joint for polyethylene single-walled spiral corrugated pipe according to claim 1, characterized in that, The telescopic component includes a telescopic spring (12) sleeved on the insert rod (7), and the two ends of the telescopic spring (12) are fixedly connected to the groove wall of the annular groove (5) and the surface of the card plate (9), respectively.

3. The spiral joint for polyethylene single-walled spiral corrugated pipe according to claim 1, characterized in that, The connector (1) is fixedly fitted with an annular sleeve (13), and the surface of the annular sleeve (13) is provided with multiple rubber protrusions in a circumferential shape.

4. The spiral joint for polyethylene single-walled spiral corrugated pipe according to claim 3, characterized in that, An annular mounting groove (14) is provided on the surface of the annular sleeve (13) near the second hollow rod (3), and a limiting component is provided in the mounting groove (14) to restrict the movement of multiple insertion rods (7).

5. The spiral joint for polyethylene single-walled spiral corrugated pipe according to claim 4, characterized in that, The limiting component includes multiple spring rods (15) fixedly installed in the mounting groove (14) in a circumferential shape and a limiting cylinder (16) fixedly installed at one end of the multiple spring rods (15). The limiting cylinder (16) is slidably disposed in the mounting groove (14), and the inner wall of the limiting cylinder (16) is in sliding contact with the surface of the multiple handles (8).

6. The spiral joint for polyethylene single-walled spiral corrugated pipe according to claim 5, characterized in that, The surface of the round rod (4) is coated with a smooth coating, which is polytetrafluoroethylene.

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