Leakage-proof connecting structure for pipeline construction

Abstract

The utility model discloses a leakproof connecting structure for pipeline construction, which comprises a front pipe and a rear pipe, an inner convex pipe is arranged at the top of the front pipe, an outer thread is arranged outside the inner convex pipe, an outer convex pipe is arranged at the top of the rear pipe, an inner thread matched with the outer thread is arranged on the inner wall of the outer convex pipe, and a fixed sleeve is arranged on the outer side of the top end of the front pipe. A movable sleeve is arranged at the top end of the rear pipe and wraps the fixed sleeve. The utility model has the beneficial effects that the device is simple in structure, easy to mount and dismount, free of special skills or equipment, and convenient to maintain; and through cooperation of the internal threads and the external threads and arrangement of the threaded holes, multi-layer sealing is conducted on the pipeline, meanwhile, connecting gaps are reduced, and the thread sealing performance is effectively enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field related to pipeline construction, in particular to a leak-proof connection structure for pipeline construction. Background Art

[0002] Water pipes are generally divided into three categories. The first category is metal pipes, such as copper pipes, stainless steel pipes, etc. The second category is plastic-clad metal pipes, such as plastic-clad steel pipes, aluminum-plastic composite pipes, etc. The third category is plastic pipes, such as PB and PP-R. Water pipes are pipes for water supply and drainage. With the continuous acceleration of urbanization and the gradual improvement of people's economic level, the demand for tap water has increased significantly. During the installation of pipes, improper operation or inadequate connection can easily lead to leakage at the joints of the pipes, resulting in waste of water resources.

[0003] In existing pipeline projects, pipe connection structures are often connected by threaded connection or flange connection. Threaded connection is a common mechanical connection method that is relatively easy to install and disassemble and does not require special welding skills or equipment. They can also provide a certain degree of adjustment and adjustment to meet different needs. The installation of flange connection requires more time and labor costs, and may require more space. In addition, the number of parts of flange connection is large, which may increase the cost and system complexity. Utility Model Content

[0004] In view of the shortcomings of the above connection methods, the utility model provides a pipeline connection structure with good sealing performance, convenient installation, simple structure and easy maintenance. The technical solution of the utility model is as follows:

[0005] A leak-proof connection structure for pipeline construction includes a front pipe and a rear pipe, wherein the top of the front pipe is provided with an inner convex pipe, the outer side of the inner convex pipe is provided with an outer thread, the top of the rear pipe is provided with an outer convex pipe, the inner wall of the outer convex pipe is provided with an inner thread matching the outer thread, a fixed sleeve is provided on the outer side of the top end of the front pipe, and the top end of the rear pipe is provided with a movable sleeve, and the movable sleeve covers the fixed sleeve.

[0006] Furthermore, the fixed sleeve is integrally connected to the front tube, a circular groove is formed between the fixed sleeve and the inner convex tube, and the circular groove fits with the outer convex tube.

[0007] Furthermore, the front tube and the rear tube are threadedly connected via the external threads and the internal threads to form a straight tube structure.

[0008] Furthermore, the inner diameter of the fixed sleeve is the same as the outer diameter of the rear tube, the inner wall of the top end of the fixed sleeve is provided with a first internal thread, and the outer side of the rear tube is provided with a first external thread corresponding to the first internal thread.

[0009] Furthermore, the movable sleeve includes a sliding sleeve and a threaded sleeve connected in sequence, the inner diameter of the sliding sleeve is equal to the outer diameter of the rear tube, the inner diameter of the threaded sleeve is equal to the outer diameter of the fixed sleeve and covers the fixed sleeve, a second external thread is provided on the outer side of the top end of the fixed sleeve, and a second internal thread corresponding to the second external thread is provided on the inner side of the threaded sleeve.

[0010] Furthermore, sealing rings are provided at the top ends of the sliding sleeve and the fixed sleeve.

[0011] Furthermore, a threaded groove is provided on the top of the threaded sleeve, and a threaded hole corresponding to the threaded groove is coaxially provided in the rear tube, the fixed sleeve and the threaded sleeve at the corresponding position of the threaded groove, and the bottom of the threaded hole is half-entered into the wall of the rear tube, and the threaded hole is located between the external thread and the first external thread, and the first external thread and the second external thread are arranged in parallel and have the same length.

[0012] The beneficial effects of the utility model are: 1. The utility model has a simple structure, is easy to install and disassemble, does not require special skills or equipment, and is easy to maintain; 2. Through the cooperation of internal and external threads and the setting of threaded holes, the pipeline can be sealed in multiple layers while reducing the connection gap, effectively enhancing the sealing performance of the thread. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0014] Figure 2 It is a schematic diagram of the cross-sectional structure of the utility model;

[0015] Figure 3 For the utility model Figure 2 Schematic diagram of the structure at point A in the middle.

[0016] In the figure: 1-front tube, 11-inner convex tube, 12-first external thread, 2-rear tube, 20-first external thread, 21-outer convex tube, 22-inner thread, 3-fixed sleeve, 30-sealing ring, 31-first internal thread, 32-second external thread, 4-movable sleeve, 41-sliding sleeve, 42-threaded sleeve, 43-second internal thread, 5-thread groove, 6-circular groove. DETAILED DESCRIPTION

[0017] 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.

[0018] Combination Figures 1 to 3 Shown:

[0019] A leakproof connection structure for pipeline construction includes a front pipe 1 and a rear pipe 2. The front pipe 1 is provided with an inner convex pipe 11 at the top, and an outer thread 12 is provided on the outer side of the inner convex pipe 11. The rear pipe 2 is provided with an outer convex pipe 21 at the top, and an inner thread 22 matching the outer thread 12 is provided on the inner wall of the outer convex pipe 21. A fixed sleeve 3 is provided on the outer side of the top of the front pipe 1, and a movable sleeve 4 is provided on the top of the rear pipe 2. The movable sleeve 4 covers the fixed sleeve 3. The front pipe 1 and the rear pipe 2 are threadedly connected through the outer thread 12 and the inner thread 22 to form a straight pipe structure. The inner diameter of the fixed sleeve 3 is the same as the outer diameter of the rear pipe 2, and it is sleeved on the top of the rear pipe 2. The inner wall of the top of the fixed sleeve 3 is provided with a first inner thread 31, and the outer side of the rear pipe 2 is provided with a first outer thread 20 corresponding to the first inner thread 31. The fixed sleeve 3 is threadedly connected with the rear pipe 2 to further enhance the sealing performance.

[0020] The fixed sleeve 3 is integrally connected with the front tube 1 , and a circular groove 6 is formed between the fixed sleeve 3 and the inner convex tube 11 , and the circular groove 6 fits with the outer convex tube 21 to prevent a gap from being generated during connection and ensure sealing.

[0021] The movable sleeve 4 includes a sliding sleeve 41 and a threaded sleeve 42 which are connected in sequence. The inner diameter of the sliding sleeve 41 is equal to the outer diameter of the rear tube 2 and is sleeved on the rear tube 2. The inner diameter of the threaded sleeve 42 is equal to the outer diameter of the fixed sleeve 3 and covers the fixed sleeve 3. A second external thread 32 is provided on the outer side of the top end of the fixed sleeve 3, and a second internal thread 43 corresponding to the second external thread 32 is provided on the inner side of the threaded sleeve 42. The connection strength between the fixed sleeve 3 and the rear tube 2 is strengthened by threaded connection and fixation.

[0022] The top of the sliding sleeve 41 and the fixed sleeve 3 are provided with a sealing ring 30 to increase the sealing ability. The top of the threaded sleeve 42 is provided with a thread groove 5. The rear tube 2, the fixed sleeve 3 and the threaded sleeve 42 at the corresponding position of the thread groove 5 are provided with a threaded hole corresponding to the thread groove 5 coaxially. The bottom of the threaded hole is half-entered into the wall of the rear tube 2 to prevent water leakage caused by penetrating into the wall. The threaded hole is located between the external thread 12 and the first external thread 20. The first external thread 12 and the second external thread 20 are arranged in parallel and have the same length. The arrangement of the threaded hole avoids the internal and external threads to enhance the sealing performance. Screws are arranged in the thread groove 5 and the threaded hole for fastening and increasing the tightness of the threaded connection.

[0023] Working principle: The fixed sleeve on the front tube is sleeved over the rear tube and rotated to connect the internal thread with the external thread and the first external thread with the second internal thread. The threaded sleeve of the movable sleeve is sleeved over the fixed sleeve and fixed through the second external thread and the second internal thread. The rear tube is fixed to the fixed sleeve and the threaded sleeve through the threaded hole to further improve the sealing ability.

[0024] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0025] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A leak-proof connection structure for pipeline construction, characterized in that: The invention comprises a front tube (1) and a rear tube (2), wherein the top of the front tube (1) is provided with an inner convex tube (11), the outer side of the inner convex tube (11) is provided with an outer thread (12), the top of the rear tube (2) is provided with an outer convex tube (21), the inner wall of the outer convex tube (21) is provided with an inner thread (22) which matches the outer thread (12), the outer side of the top of the front tube (1) is provided with a fixed sleeve (3), the top of the rear tube (2) is provided with a movable sleeve (4), and the movable sleeve (4) covers the fixed sleeve (3).

2. A leak-proof connection structure for pipeline construction according to claim 1, characterized in that: The fixed sleeve (3) is integrally connected to the front tube (1), a circular groove (6) is formed between the fixed sleeve (3) and the inner convex tube (11), and the circular groove (6) fits with the outer convex tube (21).

3. A leak-proof connection structure for pipeline construction according to claim 2, characterized in that: The front tube (1) and the rear tube (2) are threadedly connected via the external thread (12) and the internal thread (22) to form a straight tube structure.

4. A leak-proof connection structure for pipeline construction according to claim 3, characterized in that: The inner diameter of the fixed sleeve (3) is the same as the outer diameter of the rear tube (2); the inner wall of the top end of the fixed sleeve (3) is provided with a first internal thread (31); and the outer side of the rear tube (2) is provided with a first external thread (20) corresponding to the first internal thread (31).

5. A leak-proof connection structure for pipeline construction according to claim 4, characterized in that: The movable sleeve (4) comprises a sliding sleeve (41) and a threaded sleeve (42) which are connected in sequence. The inner diameter of the sliding sleeve (41) is equal to the outer diameter of the rear tube (2). The inner diameter of the threaded sleeve (42) is equal to the outer diameter of the fixed sleeve (3) and covers the fixed sleeve (3). A second external thread (32) is provided on the outer side of the top end of the fixed sleeve (3). A second internal thread (43) corresponding to the second external thread (32) is provided on the inner side of the threaded sleeve (42).

6. A leak-proof connection structure for pipeline construction according to claim 5, characterized in that: Sealing rings (30) are provided at the top ends of the sliding sleeve (41) and the fixed sleeve (3).

7. A leak-proof connection structure for pipeline construction according to claim 6, characterized in that: A thread groove (5) is provided on the top of the threaded sleeve (42); a threaded hole corresponding to the thread groove (5) is coaxially provided in the rear tube (2), the fixed sleeve (3) and the threaded sleeve (42) at a position corresponding to the thread groove (5); the bottom of the threaded hole is half-entered into the wall of the rear tube (2); the threaded hole is located between the external thread (12) and the first external thread (20); the first external thread (20) and the second external thread (32) are arranged in parallel and have the same length.

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