Expansion joint of water supply and drainage pipeline

Abstract

The utility model belongs to the technical field of pipeline connection, and discloses a water supply and drainage pipeline expansion joint. Comprising an outer pipe and a sleeve, one end of the sleeve is provided with a connecting pipe, the inner side of the connecting pipe is in threaded sleeve connection with the outer side of the outer pipe, the other end of the sleeve is provided with a clamping pipe through an adjusting assembly, and one end of the inner side of the clamping pipe is in threaded sleeve connection with an inner pipe. The clamping pipe and the sleeve are both provided with sealing rings for sealing, the inner pipe is in threaded connection with the clamping pipe, the connecting pipe is in threaded connection with the outer pipe, when the sealing rings need to be replaced, only the inner pipe, the clamping pipe and the outer pipe need to be detached, the sealing rings can be replaced, and telescopic adjustment of the clamping pipe and the inner pipe is achieved through the adjusting assembly; and a baffle ring, a buffer spring, a rotating ring, a guide pipe, a sliding strip and a positioning ring are additionally arranged, so that the clamping pipe and the inner pipe are conveniently positioned, drainage pipeline leakage caused by loosening is avoided, and the working difficulty of workers is further reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline connection, and more specifically, to an expansion joint for a water supply and drainage pipeline. Background Art

[0002] Drainage pipes refer to a system composed of pipes and their ancillary facilities that collect and discharge sewage, wastewater and rainwater, including main pipes, branch pipes and pipes leading to treatment plants. Expansion joints are mainly used in the installation and maintenance of drainage pipes. They are adjusted according to the on-site installation dimensions. When working, the axial thrust can be transmitted back to the entire pipeline system, which not only improves work efficiency, but also provides certain protection for pipeline equipment such as pumps and valves.

[0003] Commonly used drainage pipe expansion joints are fastened with multiple bolts. Installation and disassembly require the use of complex tools. It is inconvenient to repair and replace after damage. The bolts are easy to loosen and easily cause drainage pipe leakage. Regular inspection and tightening are required, which increases the difficulty of the staff's work.

[0004] In view of this, the present application proposes an expansion joint for water supply and drainage pipes. Utility Model Content

[0005] In order to overcome the above-mentioned defects of the prior art, the utility model proposes an expansion joint for water supply and drainage pipes.

[0006] To achieve the above object, the utility model provides the following technical solution: a water supply and drainage pipe expansion joint, comprising an outer pipe and a sleeve, one end of the sleeve is equipped with a connecting pipe, the inner side of the connecting pipe is threadedly sleeved with the outer side of the outer pipe, the other end of the sleeve is equipped with a clamping pipe through an adjustment component, and one end of the inner side of the clamping pipe is threadedly sleeved with an inner pipe;

[0007] The adjustment assembly includes a fixed tube, which is rotatably mounted on the other end of the sleeve. The inner wall of the fixed tube is meshed with a gear, and the gear is fixedly connected to one end of a rotating rod rotatably mounted on the other end of the sleeve. An adjustment plate is threadedly sleeved on the outer side of the rotating rod, and the adjustment plate is fixedly connected to one end of the outer side of the clamping tube.

[0008] Furthermore, a retaining ring is installed on the outside of the fixed tube, one end of the retaining ring is elastically connected to a swivel through a buffer spring, the swivel is slidably installed on the outside of the fixed tube, a guide tube is installed on the outside of the swivel, and the inner side of the guide tube is slidably connected to the outside of the retaining ring.

[0009] Furthermore, a plurality of slide bars are installed in a circular array on the outer side of the fixed tube, a slide groove slidably connected to the slide bar is provided on the inner side of the rotating ring, a positioning ring is installed on the other end of the sleeve, the inner side of the positioning ring is rotatably connected to the outer side of the fixed tube, and crown teeth that mesh with each other are provided at one end of the positioning ring and the rotating ring that are in contact with each other.

[0010] Furthermore, a card slot is provided at the other inner end of the card tube, and a sealing ring 1 is installed in the card slot.

[0011] Furthermore, a placement groove is provided at one end of the sleeve, a sealing ring 2 is installed in the placement groove, and the inner side of the sealing ring 2 is slidably connected to the outer side of the inner tube.

[0012] Furthermore, a limiting tube is installed at one end of the inner tube away from the clamping tube, and the outer side of the limiting tube is slidably connected to the inner side of the outer tube.

[0013] The technical effects and advantages of the utility model of a water supply and drainage pipe expansion joint are as follows:

[0014] The clamping tube and the sleeve are both sealed with sealing rings, the inner tube and the clamping tube are connected by threads, and the connecting tube and the outer tube are connected by threads. When the sealing ring needs to be replaced, only the inner tube, the clamping tube and the outer tube need to be disassembled to replace the sealing ring. The telescopic adjustment of the clamping tube and the inner tube can be achieved through the adjustment component. The retaining ring, buffer spring, swivel, guide tube, slide bar and positioning ring are added to facilitate the positioning of the clamping tube and the inner tube to avoid leakage of the drainage pipe caused by looseness, further reducing the work difficulty of the staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 It is an exploded view of the overall structure of the utility model;

[0017] Figure 3 This is a schematic diagram of the internal structure of the casing of the utility model;

[0018] Figure 4 For the utility model Figure 3 A magnified view of the structure in the middle.

[0019] In the figure:

[0020] 1. Outer tube; 2. Sleeve; 201. Connecting tube; 3. Clamping tube; 301. Sealing ring 1; 4. Inner tube; 401. Limiting tube; 5. Sealing ring 2; 6. Fixed tube; 7. Gear; 8. Turning rod; 801. Adjusting plate; 9. Retaining ring; 10. Buffer spring; 11. Turning ring; 12. Guide tube; 13. Positioning ring; 14. Sliding bar. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] Embodiment 1

[0023] Reference Figure 1-3 A water supply and drainage pipe expansion joint comprises an outer pipe 1 and a sleeve 2, a connecting pipe 201 is installed at one end of the sleeve 2, there are two sleeves 2, the two sleeves 2 are respectively located at the two ends of the outer pipe 1, the inner side of the connecting pipe 201 is threadedly sleeved with the outer side of the outer pipe 1, and the other end of the sleeve 2 is installed with a clamping tube 3 through an adjusting component, and an inner pipe 4 is threadedly sleeved at one end of the inner side of the clamping tube 3. The sleeve 2, the outer pipe 1 and the inner pipe 4 are threadedly connected to facilitate disassembly and installation. A limiting tube 401 is installed at one end of the inner pipe 4 away from the clamping tube 3, the outer side of the limiting tube 401 is slidably connected to the inner side of the outer pipe 1, and the limiting tube 401 movably conflicts with the end of the sleeve 2 to limit the inner pipe 4.

[0024] A card groove is provided at the other end of the inner side of the clamping tube 3, and a sealing ring 301 is installed in the card groove. A placement groove is provided at one end of the sleeve 2, and a sealing ring 2 5 is installed in the placement groove. The inner side of the sealing ring 2 5 is slidably connected to the outer side of the inner tube 4, and the inner side of the sealing ring 1 301 fits with the outer side of the external drainage pipe. The sealing ring 1 301 and the sealing ring 2 5 play a role in increasing the sealing performance.

[0025] Embodiment 2

[0026] Reference Figure 2-4 The adjustment component includes a fixed tube 6, which is rotatably installed at the other end of the sleeve 2. The inner wall of the fixed tube 6 is meshed with a gear 7. The gear 7 is fixedly connected to one end of a rotating rod 8 rotatably installed at the other end of the sleeve 2. The outer thread of the rotating rod 8 is sleeved with an adjustment plate 801. The adjustment plate 801 is fixedly connected to one end of the outer side of the clamping tube 3. The fixed tube 6 is rotated to realize the rotation of the rotating rod 8 through the meshing of the gear 7. The adjustment plate 801 is moved through the outer thread of the rotating rod 8 to realize the telescopic movement of the clamping tube 3.

[0027] A retaining ring 9 is installed on the outer side of the fixed tube 6. One end of the retaining ring 9 is elastically connected to a swivel 11 through a buffer spring 10. The buffer spring 10 serves to limit the swivel 11. The swivel 11 is slidably installed on the outer side of the fixed tube 6. A guide tube 12 is installed on the outer side of the swivel 11. The inner side of the guide tube 12 is slidably connected to the outer side of the retaining ring 9. The guide tube 12 serves to seal the gap between the swivel 11 and the retaining ring 9 to prevent the buffer spring 10 from being affected by moisture and dust in the air and reducing its service life.

[0028] A plurality of slide bars 14 are installed in a circular array on the outside of the fixed tube 6, and a slide groove is provided on the inner side of the swivel 11 for sliding connection with the slide bar 14, and the slide bar 14 and the slide groove serve to increase the friction resistance between the fixed tube 6 and the swivel 11. A positioning ring 13 is also installed on the other end of the sleeve 2, and the inner side of the positioning ring 13 is rotatably connected to the outer side of the fixed tube 6. The end of the positioning ring 13 and the swivel 11 that are in contact with each other is provided with mutually meshing crown teeth, and the crown teeth serve to increase the friction resistance between the positioning ring 13 and the swivel 11.

[0029] Working principle: During installation, first install the sealing ring 301 in the card groove of the card tube 3, then thread the inner tube 4 on the inner side of the card tube 3, then install the sealing ring 2 5 in the placement groove of the sleeve 2, thread the connecting pipe 201 on both ends of the outer tube 1, and then place the installed expansion joint at the external drainage pipe joint, slide the guide tube 12 toward the end away from the outer tube 1, so that the swivel 11 is out of contact with the positioning ring 13, and then rotate the guide tube 12. The guide tube 12 drives the fixed tube 6 to rotate through the swivel 11 and the slide bar 14, and the fixed tube 6 drives the gear 7 to rotate, and the gear 7 drives the rotating rod 8 to rotate. The rotating rod 8 drives the card tube 3 to extend outward through the adjusting plate 801, so that the sealing ring 301 is stuck on the outside of the external drainage pipe and fixed, and then loosen the guide tube 12. The rebound force of the buffer spring 10 itself drives the swivel 11 to engage and fix with the positioning ring 13. When disassembling, you only need to repeat the reverse steps of the above operation, which is convenient for disassembly and installation.

[0030] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

[0031] Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A water supply and drainage pipe expansion joint, characterized in that: It comprises an outer tube (1) and a sleeve (2), wherein a connecting tube (201) is installed at one end of the sleeve (2), the inner side of the connecting tube (201) is threadedly sleeved with the outer side of the outer tube (1), and a clamping tube (3) is installed at the other end of the sleeve (2) via an adjustment component, and an inner end of the clamping tube (3) is threadedly sleeved with an inner tube (4); The adjustment assembly comprises a fixed tube (6), the fixed tube (6) being rotatably mounted on the other end of the sleeve (2), the inner wall of the fixed tube (6) being meshed with a gear (7), the gear (7) being fixedly connected to one end of a rotating rod (8) rotatably mounted on the other end of the sleeve (2), the outer side of the rotating rod (8) being threadedly sleeved with an adjustment plate (801), and the adjustment plate (801) being fixedly connected to one end of the outer side of the clamping tube (3).

2. The expansion joint for water supply and drainage pipes according to claim 1, characterized in that: A retaining ring (9) is installed on the outer side of the fixed tube (6), one end of the retaining ring (9) is elastically connected to a rotating ring (11) via a buffer spring (10), the rotating ring (11) is slidably installed on the outer side of the fixed tube (6), a guide tube (12) is installed on the outer side of the rotating ring (11), and the inner side of the guide tube (12) is slidably connected to the outer side of the retaining ring (9).

3. The expansion joint for water supply and drainage pipes according to claim 2, characterized in that: The outer side of the fixed tube (6) is also provided with a plurality of slide bars (14) in an annular array, the inner side of the rotating ring (11) is provided with a slide groove slidably connected to the slide bar (14), and the other end of the sleeve (2) is also provided with a positioning ring (13), the inner side of the positioning ring (13) is rotatably connected to the outer side of the fixed tube (6), and the end of the positioning ring (13) and the rotating ring (11) that are in contact with each other is provided with mutually meshing crown teeth.

4. The expansion joint for water supply and drainage pipes according to claim 1, characterized in that: A card slot is provided at the other inner end of the card tube (3), and a sealing ring (301) is installed in the card slot.

5. The expansion joint for water supply and drainage pipes according to claim 1, characterized in that: One end of the sleeve (2) is provided with a placement groove, in which a second sealing ring (5) is installed, and the inner side of the second sealing ring (5) is slidably connected to the outer side of the inner tube (4).

6. The expansion joint for water supply and drainage pipes according to claim 5, characterized in that: A limiting tube (401) is installed at one end of the inner tube (4) away from the clamping tube (3), and the outer side of the limiting tube (401) is slidably connected to the inner side of the outer tube (1).

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