Socket type plastic-coated composite spiral steel pipe for water supply and drainage

Abstract

The utility model relates to the technical field, and discloses a socket type plastic-coated composite spiral steel pipe for water supply and drainage, which comprises a steel coil, the steel coil is used for manufacturing a spiral steel coil, a connecting mechanism is arranged on the steel coil, the connecting mechanism is used for conveniently rolling the steel coil, and the spiral steel pipe is formed by welding after the steel coil is rolled. A connecting mechanism is arranged on the steel coil, the connecting mechanism comprises an inserting groove formed in the outer side of the steel coil and an inserting block arranged on the inner side of the steel coil, the inserting block is matched with the inserting groove, the inserting block can be inserted into the inserting groove, and through cooperation of the inserting groove and the inserting block, the outer side and the inner side are preliminarily connected through the connecting mechanism in the rolling process of the steel coil; and therefore, the rolled steel coil cannot be loosened, the steel coil is rolled more tightly, welding forming of the steel coil is facilitated, and the finished product quality of the spiral steel pipe is improved.

Description

Technical Field

[0001] The utility model relates to the technical field, in particular to a socket-and-spigot type plastic-coated composite spiral steel pipe for water supply and drainage. Background Art

[0002] Currently, large-diameter steel pipes are mostly used as water supply pipes, and most of them are buried. Therefore, in addition to meeting the internal pressure of the medium flowing inside the pipe, the steel pipe itself must also meet the pressure of the external load and prevent the duck egg-shaped deformation caused by its own weight. This requires the wall thickness of the steel pipe to be very thick. In fact, the main purpose of the steel pipe is to transport fluids and meet the internal pressure. When meeting this requirement, the wall thickness of the steel pipe does not need to be too thick. The traditional steel pipe processing method is to first roll a single steel plate into a round shape, weld it into a straight seam, and make a single steel pipe. The length of a single steel pipe is generally 3m long, and then multiple single steel pipes are butt-welded to make a standard length pipe section. This method has low production efficiency, and the stress effect of the straight weld is worse than that of the spiral weld, the weld coefficient is low, and the required steel plate thickness is larger than that of the spiral welded pipe of the same specification, which wastes materials.

[0003] Therefore, we proposed a socket-type plastic-coated composite spiral steel pipe for water supply and drainage in order to solve the above-mentioned problems. Utility Model Content

[0004] The purpose of the present utility model is to provide a socket-type plastic-coated composite spiral steel pipe for water supply and drainage, so as to solve the problem that the traditional steel pipe processing method proposed in the above background technology is to first roll a single steel plate into a circle, weld a straight seam, and make a single-section steel pipe. The length of a single-section steel pipe is generally 3m long, and then multiple single-section steel pipes are butt-welded to make pipe sections of standard length. This method has low production efficiency, and the stress effect of the straight weld is worse than that of the spiral weld, the weld coefficient is low, the required steel plate thickness is larger than that of the spiral welded pipe of the same specification, and material waste.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: a socket-and-spigot plastic-coated composite spiral steel pipe for water supply and drainage, comprising a steel coil, the steel coil being used to make a spiral steel coil, the steel coil being provided with a connecting mechanism, the connecting mechanism being used to facilitate the coiling of the steel coil;

[0006] The connecting mechanism includes a slot opened on the outer surface of the steel coil, and an insert block adapted to the slot is provided on the inner side of the steel coil, and the insert block is used to be inserted into the slot.

[0007] Preferably, a U-shaped groove is further provided on the inserting block, and the U-shaped groove is used to facilitate the matching between the slot and the inserting block.

[0008] Preferably, a triangular groove is further provided on the insert block, and the triangular groove is used to facilitate cutting of the insert block.

[0009] Preferably, the insert block is further provided with an auxiliary mechanism, and the auxiliary mechanism is used to make the insert block and the slot fit more tightly;

[0010] The auxiliary mechanism includes a main connecting tooth arranged on the insert block, and a secondary connecting tooth adapted to the main connecting tooth is arranged in the slot, and the main connecting tooth and the secondary connecting tooth are engaged with each other.

[0011] Preferably, the main connecting teeth are further provided with a conflict mechanism, and the conflict mechanism is used to facilitate the cooperation between the main connecting teeth and the auxiliary connecting teeth;

[0012] The interference mechanism includes a placement groove provided on the main connecting tooth, a round ball is arranged in the placement groove, and the round ball is used to interfere with the auxiliary connecting tooth.

[0013] Preferably, the placement groove and the ball are eccentrically arranged, and the center of the ball is located in front of the center of the placement groove.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] 1. In order to facilitate welding after the steel coil is rolled to form a spiral steel pipe, a connecting mechanism is provided on the steel coil. The connecting mechanism includes a slot opened on the outside of the steel coil and an insert block provided on the inside of the steel coil. The insert block is adapted to the slot, and the insert block can be inserted into the slot. Through the cooperation of the slot and the insert block, the outer and inner sides of the steel coil are initially connected through the connecting mechanism during the rolling process, so that the steel coil will not loosen after rolling, and the steel coil can be rolled more tightly to facilitate its welding and forming, thereby improving the quality of the finished product of the spiral steel pipe.

[0016] 2. In order to facilitate pressing, a U-shaped groove is provided on the insert. The U-shaped groove can increase the depth of the insert into the slot, so that during the pressing process, the inner and outer sides of the steel coil can be as close as possible, thereby avoiding the occurrence of connection gaps due to the setting of the connection mechanism, which in turn increases the difficulty of subsequent welding. In addition, because the U-shaped groove is provided, the weight of the insert is reduced, thereby avoiding the overweight of a single spiral steel pipe due to the addition of the connection mechanism.

[0017] 3. In order to further increase the tightness of the fit between the plug and the slot, an auxiliary mechanism is also provided on the plug. The auxiliary mechanism includes a main connecting tooth provided on the plug and a secondary connecting tooth provided in the slot. The main connecting teeth and the secondary connecting teeth are adapted to and meshed with each other. By providing the main connecting teeth and the secondary connecting teeth, after the plug is inserted into the slot, the main connecting teeth and the secondary connecting teeth mesh with each other for positioning, thereby avoiding unknown offset of the slot and the plug after rolling, thereby improving the yield rate of steel coil rolling.

[0018] 4. In order to facilitate the engagement of the main connecting teeth and the auxiliary connecting teeth, a resistance mechanism is also provided on the main connecting teeth. The resistance mechanism includes a placement groove opened on the main connecting teeth, and a round ball is provided in the placement groove. The round ball is movably arranged in the placement groove. When the main connecting teeth and the auxiliary connecting teeth are matched, the outer surface of the auxiliary connecting teeth will resist the round ball and squeeze the round ball into the main connecting teeth. By providing the round ball, high-intensity hard friction will not occur between the main connecting teeth and the auxiliary connecting teeth during the engagement process, so as to avoid excessive resistance to pressing. At the same time, since the round ball can be moved in the placement groove, the gap between the main connecting teeth and the auxiliary connecting teeth will not be too large, so as to avoid the problem of excessive meshing error, which causes the steel coil to shift during the rolling process. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the utility model.

[0020] Figure 2 It is a schematic diagram of the local structure of the utility model.

[0021] Figure 3 It is a schematic diagram of the planar structure of the present utility model.

[0022] Figure 4 for Figure 3 Partial cross-sectional view at AA in the middle.

[0023] Figure 5 for Figure 4 A partial enlarged view of point A in the middle.

[0024] In the figure: 1. Steel coil; 2. Connecting mechanism; 21. Slot; 22. Insert block; 3. U-shaped groove; 4. Auxiliary mechanism; 41. Main connecting tooth; 42. Secondary connecting tooth; 5. Interference mechanism; 51. Placement groove; 52. Round ball; 6. Triangular groove. DETAILED DESCRIPTION

[0025] The following will be combined with the 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] Example 1: Please refer to Figure 1-Figure 2 A socket-and-spigot plastic-coated composite spiral steel pipe for water supply and drainage comprises a steel coil 1 for making a spiral steel coil, a connecting mechanism 2 being provided on the steel coil 1 for facilitating the coiling of the steel coil 1;

[0027] The connecting mechanism 2 includes a slot 21 provided on the outer surface of the steel coil 1 . An insert block 22 adapted to the slot 21 is provided on the inner side of the steel coil 1 . The insert block 22 is used to be inserted into the slot 21 .

[0028] The insert block 22 is further provided with a U-shaped groove 3 , which is used to facilitate the matching between the slot 21 and the insert block 22 .

[0029] The insert block 22 is further provided with a triangular groove 6 for facilitating cutting of the insert block 22 .

[0030] In this embodiment: In order to facilitate welding of the steel coil 1 after rolling to form a spiral steel pipe, a connecting mechanism 2 is provided on the steel coil 1. The connecting mechanism 2 includes a slot 21 opened on the outside of the steel coil 1 and an insert block 22 provided on the inside of the steel coil 1. The insert block 22 is adapted to the slot 21, and the insert block 22 can be inserted into the slot 21. Through the cooperation of the slot 21 and the insert block 22, the outer side and the inner side of the steel coil 1 are initially connected through the connecting mechanism 2 during the rolling process, so that the steel coil 1 will not loosen after rolling, and the steel coil 1 can be rolled more tightly to facilitate its welding and forming, thereby improving the quality of the finished product of the spiral steel pipe.

[0031] At the same time, in order to facilitate pressing, a U-shaped groove 3 is provided on the insert block 22. Through the U-shaped groove 3, the depth of the insert block 22 entering the slot 21 can be increased, so that during the pressing process, the inner and outer sides of the steel coil 1 can be as close as possible, thereby avoiding the occurrence of connection gaps due to the setting of the connecting mechanism 2, which in turn increases the difficulty of subsequent welding. In addition, because the U-shaped groove 3 is provided, the weight of the insert block 22 is reduced, thereby avoiding the overweight of a single spiral steel pipe due to the addition of the connecting mechanism 2.

[0032] At the same time, since the spiral steel pipe made of the steel coil 1 has a maximum length, in order to facilitate the removal of the plug blocks 22 at both ends, a triangular groove 6 is also provided on the plug block 22. By providing the triangular groove 6, a cutting space is reserved to facilitate cutting.

[0033] Example 2: This example is an improvement made on the basis of Example 1. For details, please refer to Figure 3-Figure 5 , an auxiliary mechanism 4 is also provided on the insert block 22, and the auxiliary mechanism 4 is used to make the insert block 22 fit more tightly with the slot 21;

[0034] The auxiliary mechanism 4 includes a main connecting tooth 41 provided on the insert block 22 , and a secondary connecting tooth 42 adapted to the main connecting tooth 41 is provided in the slot 21 . The main connecting tooth 41 and the secondary connecting tooth 42 are meshed with each other.

[0035] The main connecting tooth 41 is also provided with a resistance mechanism 5, which is used to facilitate the cooperation between the main connecting tooth 41 and the auxiliary connecting tooth 42;

[0036] The interference mechanism 5 includes a placement groove 51 formed on the main connecting tooth 41 . A ball 52 is disposed in the placement groove 51 . The ball 52 is used to interfere with the auxiliary connecting tooth 42 .

[0037] The placement groove 51 and the ball 52 are eccentrically arranged, and the center of the ball 52 is located in front of the center of the placement groove 51.

[0038] In this embodiment: In order to further increase the fit tightness between the plug block 22 and the slot 21, an auxiliary mechanism 4 is further provided on the plug block 22. The auxiliary mechanism 4 includes a main connecting tooth 41 provided on the plug block 22 and an auxiliary connecting tooth 42 provided in the slot 21. The main connecting teeth 41 and the auxiliary connecting teeth 42 are adapted to each other and mesh with each other. By providing the main connecting teeth 41 and the auxiliary connecting teeth 42, after the plug block 22 is inserted into the slot 21, the main connecting teeth 41 and the auxiliary connecting teeth 42 mesh with each other for positioning, thereby avoiding unknown offset between the slot 21 and the plug block 22 after rolling, thereby improving the yield rate of the steel coil 1.

[0039] At the same time, in order to facilitate the engagement of the main connecting tooth 41 and the auxiliary connecting tooth 42, an interference mechanism 5 is also provided on the main connecting tooth 41. The interference mechanism 5 includes a placement groove 51 opened on the main connecting tooth 41, and a round ball 52 is provided in the placement groove 51. The round ball 52 is movably arranged in the placement groove 51. When the main connecting tooth 41 and the auxiliary connecting tooth 42 are matched, the outer surface of the auxiliary connecting tooth 42 will interfere with the round ball 52 and squeeze the round ball 52 into the main connecting tooth 41. By providing the round ball 52, there will be no high-intensity hard friction between the main connecting tooth 41 and the auxiliary connecting tooth 42 during the engagement process, so as to avoid excessive pressing resistance. At the same time, since the round ball 52 can be moved in the placement groove 51, the direct gap between the main connecting tooth 41 and the auxiliary connecting tooth 42 will not be too large, so as to avoid the problem of excessive meshing error, which causes the steel coil 1 to offset during the rolling process.

[0040] In order to support the movement of the ball 52 in the placement groove 51, the centers of the placement groove 51 and the ball 52 are eccentrically set, and the center of the placement groove 51 is located behind the center of the ball 52, so that the ball 52 will not fall off the placement groove 51. At the same time, there is also reserved space for the ball 52 to move in the placement groove 51 so that it can be squeezed into the placement groove 51 by the auxiliary connecting tooth 42.

[0041] The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0042] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A socket-and-spigot plastic-coated composite spiral steel pipe for water supply and drainage, comprising a steel coil (1), wherein the steel coil (1) is used to make a spiral steel coil, and is characterized in that: The steel coil (1) is provided with a connecting mechanism (2), and the connecting mechanism (2) is used to facilitate the rolling of the steel coil (1); The connecting mechanism (2) comprises a slot (21) provided on the outer surface of the steel coil (1); an insert block (22) adapted to the slot (21) is provided on the inner side of the steel coil (1); the insert block (22) is used to be inserted into the slot (21).

2. The socket-and-spigot plastic-coated composite spiral steel pipe for water supply and drainage according to claim 1, characterized in that: The insert block (22) is also provided with a U-shaped groove (3), and the U-shaped groove (3) is used to facilitate the matching between the slot (21) and the insert block (22).

3. The socket-and-spigot plastic-coated composite spiral steel pipe for water supply and drainage according to claim 2, characterized in that: The insert block (22) is also provided with a triangular groove (6), and the triangular groove (6) is used to facilitate cutting of the insert block (22).

4. The socket-and-spigot plastic-coated composite spiral steel pipe for water supply and drainage according to claim 3, characterized in that: The insert block (22) is further provided with an auxiliary mechanism (4), and the auxiliary mechanism (4) is used to make the insert block (22) and the slot (21) fit more tightly; The auxiliary mechanism (4) comprises a main connecting tooth (41) arranged on the insert block (22), and a secondary connecting tooth (42) adapted to the main connecting tooth (41) is arranged in the slot (21), and the main connecting tooth (41) and the secondary connecting tooth (42) are meshed with each other.

5. The socket-and-spigot plastic-coated composite spiral steel pipe for water supply and drainage according to claim 4, characterized in that: The main connecting tooth (41) is further provided with a conflict mechanism (5), and the conflict mechanism (5) is used to facilitate the matching between the main connecting tooth (41) and the auxiliary connecting tooth (42); The interference mechanism (5) comprises a placement groove (51) provided on the main connecting tooth (41), a round ball (52) being arranged in the placement groove (51), and the round ball (52) is used to interfere with the auxiliary connecting tooth (42).

6. The socket-and-spigot plastic-coated composite spiral steel pipe for water supply and drainage according to claim 5, characterized in that: The placement groove (51) and the round ball (52) are eccentrically arranged, and the center of the round ball (52) is located in front of the center of the placement groove (51).

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