PVC-U (unplasticized polyvinyl chloride) drainage lengthened expansion joint pipe

Abstract

The utility model discloses a PVC-U drainage lengthened expansion joint pipe, which relates to the technical field of water pipe processing, and comprises a first pipe, a second pipe and an expansion joint body, the outer end part of the expansion joint body is sleeved on the first pipe, the outer end head of the expansion joint body is provided with an external thread joint, a wedge-shaped ring groove is reserved between the external thread joint and the first pipe, and the second pipe is sleeved on the second pipe. A wedge-shaped sealing ring is arranged in the wedge-shaped ring groove, an expansion joint nut is connected to the external thread connector in a threaded mode, and an annular gasket is arranged at the end of the expansion joint nut and the end of the external thread connector so that the outer end of the expansion joint body can be connected with the first pipe in a sealed mode. The length of the telescopic joint is increased by lengthening the telescopic joint, the safety coefficient is higher, the sealing effect is good through the cooperation of the circular ring gasket and the conical sealing ring, the nut of the telescopic joint is conveniently screwed by adding the circular ring gasket, and the sealing effect is enhanced.

Description

Technical Field

[0001] The utility model belongs to the technical field of water pipe processing, in particular to a PVC-U drainage lengthened telescopic joint pipe. Background Art

[0002] In modern buildings and municipal engineering, drainage pipe systems are an indispensable part. With the development of materials science, polyvinyl chloride (PVC) has been widely used in drainage pipe systems due to its good chemical stability, corrosion resistance and cost-effectiveness. In particular, unplasticized polyvinyl chloride (PVC-U) pipes have become the preferred material for drainage pipe systems due to their excellent mechanical properties and weather resistance. However, during use, the pipe system will experience thermal expansion and contraction due to temperature changes, especially when there is a large temperature difference between day and night or when the seasons change. This thermal expansion and contraction phenomenon will cause stress at the pipe joints, which may cause leakage, rupture or other damage to the pipe interface, affecting the normal operation and service life of the entire drainage system. In order to solve this problem, expansion joints are usually used during pipe design and installation to absorb the changes in pipe length caused by temperature changes. Therefore, we propose a PVC-U drainage extension expansion joint pipe. Utility Model Content

[0003] The purpose of the utility model is to provide a PVC-U drainage extended expansion joint pipe, which increases the length of the expansion joint by lengthening the expansion joint, has a higher safety coefficient, and has a good sealing effect through the cooperation of the circular washer and the conical sealing ring. The addition of the circular washer facilitates the tightening of the expansion joint nut and enhances the sealing effect. The expansion joint body and the expansion joint nut adopt trapezoidal threads, the threads do not slip, and the tightening effect is good. In addition, when the pipeline is repaired and modified, the lengthened expansion joint provides a longer expansion space, which makes the device easy to install and operate, and solves the problem that the existing pipeline system will produce thermal expansion and contraction due to temperature changes during use, especially when the temperature difference between day and night is large or when the seasons change. This thermal expansion and contraction phenomenon will cause stress at the pipeline connection, which may cause leakage, rupture or other damage to the pipeline interface, affecting the normal operation and service life of the entire drainage system.

[0004] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0005] A PVC-U drainage extended expansion joint pipe comprises a first pipe, a second pipe and an expansion joint body. The outer end of the expansion joint is sleeved on the first pipe. An external threaded joint is provided at the outer end of the expansion joint. A wedge-shaped annular groove is reserved between the external threaded joint and the first pipe. A wedge-shaped sealing ring is provided in the wedge-shaped annular groove. An expansion joint nut is threadedly connected to the external threaded joint. An annular gasket is provided between the expansion joint nut and the end of the external threaded joint to seal the outer end of the expansion joint with the first pipe.

[0006] One end of the second pipe is inserted into the inner end of the telescopic joint for connection.

[0007] Furthermore, the outer wall of the second pipe is in contact with the inner wall of the telescopic joint, and the second pipe and the telescopic joint are bonded by a PVC adhesive.

[0008] Furthermore, the expansion joint nut connection port is provided with a trapezoidal internal thread.

[0009] Furthermore, the external thread joint is provided with a trapezoidal external thread, and the telescopic joint body is threadedly connected to the trapezoidal internal thread in the telescopic joint nut via the trapezoidal external thread.

[0010] Furthermore, the cross section of the wedge-shaped sealing ring is conical, the top of the wedge-shaped sealing ring is processed into an arc surface, and the arc surface sealing top is pressed against the end surface of the annular gasket.

[0011] Furthermore, the outer wall of the telescopic joint nut is fixedly connected with an anti-skid column, and the number of the anti-skid columns is several.

[0012] The utility model has the following beneficial effects:

[0013] 1. The utility model increases the length of the expansion joint by lengthening the expansion joint, which has a higher safety coefficient, and has a good sealing effect through the cooperation of the circular washer and the conical sealing ring. The addition of the circular washer facilitates the tightening of the expansion joint nut and enhances the sealing effect. The expansion joint body and the expansion joint nut adopt trapezoidal threads, the threads do not slip, and the tightening effect is good. In addition, when repairing and modifying the pipeline, the lengthened expansion joint provides a longer expansion space, making the device easy to install and operate, with a wide range of applications, thereby improving the practicality of the device.

[0014] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 This is a schematic diagram of the half-section structure of a PVC-U drainage extended telescopic joint pipe of the utility model;

[0017] Figure 2 For this utility model Figure 1 A in the middle is an enlarged schematic diagram;

[0018] Figure 3This is a schematic diagram of the overall structure of the expansion joint nut of the utility model;

[0019] Figure 4 This is a schematic diagram of the overall structure of the annular gasket of the utility model;

[0020] Figure 5 This is a schematic diagram of the overall structure of the wedge-shaped sealing ring of the utility model;

[0021] Figure 6 This is a schematic diagram of the overall structure of the telescopic joint of the utility model;

[0022] Figure 7 This is a schematic diagram of the telescopic joint structure from above of the utility model.

[0023] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0024] 1. Pipe; 2. Ring washer; 3. Expansion joint nut; 4. Trapezoidal internal thread; 5. External thread joint; 6. Wedge-shaped sealing ring; 7. Expansion joint body; 8. Anti-skid column; 9. Second pipe; 10. Wedge-shaped ring groove; 11. Trapezoidal external thread. DETAILED DESCRIPTION

[0025] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] See also Figure 1-7As shown, the utility model is a PVC-U drainage extension expansion joint pipe, including pipes, the number of pipes is two first pipes 1 and second pipes 9, the outer end of the expansion joint body 7 is sleeved on the first pipe 1, the expansion joint body 7 and the first pipe 1 are slidingly sealed, and the length of the first pipe 1 inserted in the expansion joint body 7 is adjusted according to the pipe length. An external threaded joint 5 is provided at the outer end of the expansion joint body 7, and a wedge-shaped ring groove 10 is reserved between the external threaded joint 5 and the first pipe 1. A wedge-shaped sealing ring 6 is provided in the wedge-shaped ring groove 10, and the wedge-shaped sealing ring 6 matches the shape of the wedge-shaped ring groove 10. This sealing structure design can ensure that the external thread The threaded joint 5 is sealed against the outer wall of the first pipe 1, while also ensuring a sealed connection between the externally threaded joint 5 and the expansion joint nut 3. The expansion joint nut 3 is threadedly connected to the externally threaded joint 5. An annular gasket 2 is provided at the ends of the expansion joint nut 3 and the externally threaded joint 5. The annular gasket 2 has a rectangular cross-section and primarily seals the interface between the expansion joint nut 3 and the first pipe 1, ensuring a sealed connection between the outer end of the expansion joint body 7 and the first pipe 1. This effectively ensures a movable sealed connection between the expansion joint body 7 and the first pipe 1 during long-term use. One end of the second pipe 9 is inserted into the inner end of the expansion joint body 7 for connection. A fixed sealed connection is employed between the second pipe 9 and the expansion joint body 7.

[0027] The outer wall of the second pipe 9 is bonded to the inner wall of the telescopic section 7, and the second pipe 9 and the telescopic section 7 are bonded together using a PVC adhesive. The outer wall of the second pipe 9 is bonded to the inner wall of the telescopic section 7, and the outer wall at the left end of the second pipe 9 is bonded to the right end of the inner wall of the telescopic section 7 using a PVC adhesive. The use of PVC adhesive has the characteristics of fast drying and fast curing, and the bonding process can be completed in a short time, greatly shortening the production cycle.

[0028] The connection port of the telescopic joint nut 3 is provided with a trapezoidal internal thread 4. The external threaded joint 5 is provided with a trapezoidal external thread 11, and the telescopic joint body 7 is threadedly connected to the trapezoidal internal thread 4 in the telescopic joint nut 3 via the trapezoidal external thread 11. The inner diameter of the telescopic joint nut 3 is provided with a trapezoidal internal thread 4, and an annular washer 2 is fixedly connected to the left side of the inner wall of the telescopic joint nut 3. The purpose of providing the annular washer 2 is to facilitate the tightening of the telescopic joint nut 3 and enhance the sealing effect. The outer wall of the first pipe 1 contacts the wedge-shaped sealing ring 6.

[0029] The cross section of the wedge-shaped sealing ring 6 is conical, and the top of the wedge-shaped sealing ring 6 is processed into an arc surface, and the arc surface seal presses against the end surface of the annular gasket 2.

[0030] The outer wall of the telescopic joint nut 3 is fixedly connected with an anti-skid column 8, and the number of the anti-skid columns 8 is several.

[0031] An external thread joint 5 is provided on the outer wall of the telescopic joint body 7 , and the telescopic joint body 7 is threadedly connected to the trapezoidal internal thread 4 in the telescopic joint nut 3 through the external thread joint 5 .

[0032] The wedge-shaped sealing ring 6 is clamped on the inner side of the telescopic joint nut 3, and the wedge-shaped sealing ring 6 contacts the inner wall of the left side of the telescopic joint body 7. The wedge-shaped sealing ring 6 is conical, and the top of the wedge-shaped sealing ring 6 is arc-shaped. The purpose of setting the wedge-shaped sealing ring 6 is to achieve a good sealing effect.

[0033] A specific application of this embodiment is: by rotating the telescopic joint body 7, the telescopic joint body 7 and the telescopic joint nut 3 adopt trapezoidal threads, the threads do not slip, and the tightening effect is good, the trapezoidal internal thread 5 is threadedly connected with the external thread joint 6, and the telescopic joint length is increased by lengthening the telescopic joint body 7, the insurance factor is higher, and the sealing effect is good through the cooperation of the annular gasket 2 and the conical sealing ring. The addition of the annular gasket 2 facilitates the tightening of the telescopic joint nut 3 and enhances the sealing effect. In addition, when repairing and modifying the pipeline, the lengthened telescopic joint provides a longer telescopic space, and the device can be installed horizontally and vertically, with a wide range of applications, making the device easy to install and operate, and improving the practicality of the device.

[0034] The utility model provides a PVC-U drainage extended expansion joint pipe, which increases the length of the expansion joint by lengthening the expansion joint, has a higher safety coefficient, and has a good sealing effect through the cooperation of the circular washer and the conical sealing ring. The addition of the circular washer facilitates the tightening of the expansion joint nut, thereby enhancing the sealing effect. The expansion joint body and the expansion joint nut adopt trapezoidal threads, the threads do not slip, and the tightening effect is good. In addition, when repairing and modifying the pipeline, the lengthened expansion joint provides a longer expansion space, making the device easy to install and operate, and solves the problem that the existing pipeline system will produce thermal expansion and contraction due to temperature changes during use, especially when the temperature difference between day and night is large or when the seasons change. This thermal expansion and contraction phenomenon will cause stress in the pipeline connection, which may cause leakage, rupture or other damage to the pipeline interface, affecting the normal operation and service life of the entire drainage system.

[0035] Throughout this specification, references to terms such as "one embodiment," "example," or "specific example" indicate that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0036] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. The preferred embodiments do not describe all details in detail, nor do they limit the present invention to the specific embodiments described. Obviously, many modifications and variations are possible based on the contents of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A PVC-U drainage extension expansion joint pipe, characterized by: The invention comprises a first pipe (1), a second pipe (9) and a telescopic joint (7), wherein the outer end of the telescopic joint (7) is sleeved on the first pipe (1), an external threaded joint (5) is provided at the outer end of the telescopic joint (7), a wedge-shaped annular groove (10) is reserved between the external threaded joint (5) and the first pipe (1), a wedge-shaped sealing ring (6) is provided in the wedge-shaped annular groove (10), a telescopic joint nut (3) is threadedly connected to the external threaded joint (5), and an annular gasket (2) is provided at the end of the telescopic joint nut (3) and the external threaded joint (5), so that the outer end of the telescopic joint (7) is sealed and connected to the first pipe (1); One end of the second pipe (9) is plugged into the inner end of the telescopic joint (7) for connection.

2. The PVC-U drainage extension expansion joint pipe according to claim 1, characterized in that: The outer wall of the second pipe (9) is in contact with the inner wall of the telescopic joint (7), and the second pipe (9) and the telescopic joint (7) are bonded together by a PVC adhesive.

3. The PVC-U drainage extension expansion joint pipe according to claim 2, characterized in that: The connection port of the telescopic joint nut (3) is provided with a trapezoidal internal thread (4).

4. The PVC-U drainage extension expansion joint pipe according to claim 3, characterized in that: The external thread joint (5) is provided with a trapezoidal external thread (11), and the telescopic joint body (7) is threadedly connected to the trapezoidal internal thread (4) in the telescopic joint nut (3) via the trapezoidal external thread (11).

5. The PVC-U drainage extension expansion joint pipe according to claim 4, characterized in that: The cross section of the wedge-shaped sealing ring (6) is conical, the top of the wedge-shaped sealing ring (6) is processed into an arc surface, and the arc surface sealing top is pressed on the end surface of the annular gasket (2).

6. The PVC-U drainage extension expansion joint pipe according to claim 5, characterized in that: The outer wall of the telescopic joint nut (3) is fixedly connected with an anti-skid column (8), and the number of the anti-skid columns (8) is several.

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