Pipe fitting special for hot melting socket and spigot of metal plastic-lined pipeline

Abstract

The utility model relates to the technical field of metal plastic-lined pipeline installation, in particular to a pipe fitting special for hot melting socket and spigot of a metal plastic-lined pipeline. According to the technical scheme, metal lining plastic pipe bodies, a spigot and socket pipe, an upper clamping sleeve, a lower clamping sleeve, an upper clamping ring and a lower clamping ring are included, the spigot and socket pipe is arranged between the metal lining plastic pipe bodies, butt joint grooves are polished in the inner wall of the spigot and socket pipe and the outer walls of the metal lining plastic pipe bodies, an insertion groove is formed in the outer side of each metal lining plastic pipe body, and the upper clamping sleeve and the lower clamping sleeve are arranged in the insertion groove. An upper clamping ring and a lower clamping ring are arranged in the inserting groove, an upper clamping sleeve and a lower clamping sleeve are connected to the outer side of the upper clamping ring and the outer side of the lower clamping ring in a sleeving mode, mounting holes are formed in the upper clamping sleeve and the lower clamping sleeve, a threaded rod is inserted into the mounting holes, and a nut is rotationally connected to one end of the threaded rod in a sleeving mode. The transverse clamping structure is arranged between the metal lining plastic pipe body and the socket pipe, so that the risk that the pressure and temperature obtained in the connecting process are not enough, the inner wall is not cleaned thoroughly, the connecting face is not firm, and leakage of a butt joint pipeline is increased is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of metal-lined plastic pipeline installation, in particular to a special hot-melt socket-and-spigot pipe fitting for metal-lined plastic pipelines. Background Art

[0002] Hot-melt socket fittings for metal-lined plastic pipes generally refer to special fittings used to connect metal-lined plastic pipes. These fittings are usually designed for socketing using hot-melt technology when installing and connecting metal-lined plastic pipes to ensure the firmness and sealing of the pipe connection, including hot-melt socket elbows, socket straight pipes, hot-melt socket tees, etc.

[0003] The hot-melt socket and the butt joint of the metal-lined plastic pipe are preheated to an appropriate temperature, and the hot-melt socket is inserted into one end of the metal-lined plastic pipe. After the connection part has cooled for a certain period of time, it is solidified and shaped. However, after the butt joint of the metal-lined plastic pipe and the socket straight pipe is connected, the pressure and temperature obtained during the connection process are insufficient, and the inner wall is not cleaned properly, resulting in a loose connection surface and displacement of the butt joint pipes, increasing the risk of pipeline leakage. For this reason, we propose a special hot-melt socket fitting for metal-lined plastic pipes to solve the existing problems. Utility Model Content

[0004] The utility model aims to solve the problems existing in the background technology and provides a special hot-melt socket fitting for metal-lined plastic pipelines.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a special hot-melt socket fitting for metal-lined plastic pipes, comprising a metal-lined plastic pipe body, a socket pipe, an upper ferrule, a lower ferrule, an upper clamping ring and a lower clamping ring, a socket pipe being arranged between the metal-lined plastic pipe body, a docking groove being polished on the inner wall of the socket pipe and the outer wall of the metal-lined plastic pipe body, a slot being provided on the outer side of the metal-lined plastic pipe body, an upper clamping ring and a lower clamping ring being provided inside the slot, an upper clamping ring and a lower clamping ring being respectively sleeved on the outer sides of the upper clamping ring and the lower clamping ring, mounting holes being provided inside the upper clamping ring and the lower clamping ring, a screw being inserted inside the mounting hole, and a nut being rotatably sleeved on one end of the screw.

[0006] Preferably, a limiting ring is provided at one end of the screw rod, and the outer diameter of the limiting ring is larger than the inner diameter of the mounting hole. The limiting ring limits one end of the screw rod to prevent the screw rod from completely leaving the mounting hole.

[0007] Preferably, the inner walls of the upper and lower clamping rings are both provided with plug blocks, and the lower ends of the plug blocks are sleeved inside the slots. The plug blocks allow the upper and lower clamping rings to be intercepted by the inner walls of the slots, providing horizontal limiting support.

[0008] Preferably, the upper ferrule, the lower ferrule, the upper clasp, the lower clasp and the insert block are all in a semicircular ring shape, which is convenient for sleeve installation on the tubular structure.

[0009] Preferably, the inner walls of the upper ferrule and the lower ferrule are both provided with a semicircular block, and both ends of the upper ferrule and the lower ferrule are provided with an annular slot, and one end of the block is inserted into the slot. After the block is located in the slot, an additional support surface is provided for the upper ferrule and the lower ferrule, so that the connection between the upper ferrule and the lower ferrule and the upper block and the lower block is more stable.

[0010] Preferably, a hinge is provided at one end of the upper ferrule, and one end of the hinge is rotatably mounted with the lower ferrule. The upper ferrule and the lower ferrule can be opened and closed by the hinge, which is convenient for assembly.

[0011] Preferably, the inner wall of the bell-and-spigot pipe is provided with an annular compensation groove. During the plugging process of the metal-lined plastic pipe body and the bell-and-spigot pipe, the residual impurities are squeezed out due to the rubber material, and the compensation groove is supported by the compensation groove, providing trial and error conditions when the processing technology is not in compliance.

[0012] Preferably, the bell-and-spigot pipe and the inner wall of the metal-lined plastic pipe body are provided with corresponding butt joint surfaces, the butt joint surfaces are 30°, and the butt joints of the bell-and-spigot pipe and the metal-lined plastic pipe body are provided with filling grooves. The butt joint surfaces with 30° slopes increase the contact surface between the metal-lined plastic pipe body and the bell-and-spigot pipe, and the filling grooves are convenient for filling anti-corrosion coatings to perform anti-corrosion treatment on the butt joints between the bell-and-spigot pipe and the metal-lined plastic pipe body.

[0013] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0014] After the socket pipe and the metal plastic-lined pipe body are butted against each other, the outer wall of the butted metal plastic-lined pipe body is sleeved with an upper clamping ring and a lower clamping ring, and an upper clamping sleeve and a lower clamping sleeve that are rotatably installed are sleeved between the upper clamping ring and the lower clamping ring. A screw and a nut are matched to connect the upper clamping sleeve and the lower clamping sleeve on both sides, so that the socket pipe and the metal plastic-lined pipe body are subjected to relative extrusion pressure after the butt joint, avoiding the problem of displacement of the metal plastic-lined pipe body after the butt joint due to problems in the processing technology, which leads to leakage. The socket pipe and the metal plastic-lined pipe body are more stable after being connected. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the main three-dimensional structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the main sectional three-dimensional structure of the utility model;

[0017] Figure 3 This is a schematic diagram of the main cross-sectional three-dimensional structure of the upper clamping ring of the utility model;

[0018] Figure 4 It is a schematic diagram of the main cross-sectional three-dimensional structure of the bell-and-spigot pipe of the utility model.

[0019] Figure numerals: 1. Metal-lined plastic pipe body; 2. Socket pipe; 3. Upper ferrule; 4. Lower ferrule; 5. Hinge; 6. Upper retaining ring; 7. Lower retaining ring; 8. Docking groove; 9. Screw; 10. Nut; 11. Mounting hole; 12. Limiting ring; 13. Block; 14. Insert block; 15. Slot; 16. Slot; 17. Filling groove; 18. Docking surface; 19. Compensation groove. DETAILED DESCRIPTION

[0020] 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.

[0021] like Figure 1-Figure 4 As shown, the utility model proposes a special hot-melt socket fitting for metal-lined plastic pipes, comprising a metal-lined plastic pipe body 1, a socket pipe 2, an upper ferrule 3, a lower ferrule 4, an upper clamping ring 6 and a lower clamping ring 7. A socket pipe 2 is arranged between the metal-lined plastic pipe body 1, and a docking groove 8 is polished on the inner wall of the socket pipe 2 and the outer wall of the metal-lined plastic pipe body 1. A slot 15 is provided on the outer side of the metal-lined plastic pipe body 1, and an upper clamping ring 6 and a lower clamping ring 7 are arranged inside the slot 15. An upper clamping ring 3 and a lower clamping ring 4 are respectively sleeved on the outer sides of the upper clamping ring 6 and the lower clamping ring 7, and mounting holes 11 are provided inside the upper clamping ring 3 and the lower clamping ring 4, and a screw rod 9 is inserted inside the mounting hole 11, and a nut 10 is rotatably sleeved on one end of the screw 9.

[0022] A limiting ring 12 is disposed at one end of the screw rod 9 , and the outer diameter of the limiting ring 12 is larger than the inner diameter of the mounting hole 11 .

[0023] Insert blocks 14 are disposed on the inner walls of the upper clamp ring 6 and the lower clamp ring 7 , and the lower ends of the insert blocks 14 are sleeved in the slots 15 .

[0024] The upper clamping sleeve 3, the lower clamping sleeve 4, the upper clamping ring 6, the lower clamping ring 7 and the inserting block 14 are all in a semicircular ring shape.

[0025] The inner walls of the upper ferrule 3 and the lower ferrule 4 are both provided with a semicircular block 13 , and both ends of the upper ferrule 6 and the lower ferrule 7 are provided with an annular groove 16 , and one end of the block 13 is inserted into the groove 16 .

[0026] A hinge 5 is arranged at one end of the upper ferrule 3, and one end of the hinge 5 is rotatably mounted with the lower ferrule 4. An annular compensation groove 19 is provided on the inner wall of the socket pipe 2.

[0027] The inner wall of the bell-and-spigot pipe 2 and the metal-lined plastic pipe body 1 are both provided with corresponding butt joint surfaces 18 , and the butt joint surface 18 is 30°. A filling groove 17 is provided at the butt joint between the bell-and-spigot pipe 2 and the metal-lined plastic pipe body 1 .

[0028] The implementation steps based on Example 1 are as follows: after the metal of the outer wall of the metal-lined plastic pipe body 1 is cut, the cut surface of the metal-lined plastic pipe body 1 and the inner wall of the socket pipe 2 are polished to form a docking groove 8, the docking surface 18 is heated and then coated with glue, the docking groove 8 is plugged in, the upper clamping ring 6 and the lower clamping ring 7 are plugged into the slot 15 through the plug block 14, one end of the screw 9 is plugged into the mounting hole 11, the upper ferrule 3 and the lower ferrule 4 are sleeved on the inner wall of the slot 16 through the block 13, the nut 10 is rotatably sleeved on one end of the screw 9, the threaded engagement process realizes relative extrusion pressure on the metal-lined plastic pipe body 1 and the bearing pipe, and the compensation groove 19 is inserted between the metal-lined plastic pipe body 1 and the socket pipe 2. During the connection process, excess rubber applied in the docking groove 8 and impurities remaining after unclear grinding and cleaning are pushed into the compensation groove 19 during the extrusion process, preventing excess rubber and impurities from affecting its fit. The filling groove 17 is filled with anti-corrosion coating, and the docking point between the bell pipe 2 and the metal-lined plastic pipe body 1 is treated with anti-corrosion treatment, avoiding the problem that the metal-lined plastic pipe body 1 and the bell pipe 2 have an unstable connection surface due to insufficient pressure and temperature obtained during the connection process, and the inner wall is not cleaned properly, resulting in displacement of the docked pipes, and increasing the risk of leakage during use. The stability of the metal-lined plastic pipe body 1 and the bell pipe 2 after installation is improved.

[0029] The above-mentioned specific embodiments are only several preferred embodiments of the present invention. Based on the technical solution of the present invention and the relevant inspiration of the above-mentioned embodiments, those skilled in the art can make various alternative improvements and combinations to the above-mentioned specific embodiments.

[0030] 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-limiting 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 are included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A hot-melt socket-and-spigot special pipe fitting for a metal-lined plastic pipe, comprising a metal-lined plastic pipe body (1), a socket-and-spigot pipe (2), an upper ferrule (3), a lower ferrule (4), an upper clamping ring (6) and a lower clamping ring (7), characterized in that: A bell-and-spigot pipe (2) is arranged between the metal-lined plastic pipe body (1), and the inner wall of the bell-and-spigot pipe (2) and the outer wall of the metal-lined plastic pipe body (1) are both polished with a docking groove (8). A slot (15) is provided on the outer side of the metal-lined plastic pipe body (1), and an upper clamping ring (6) and a lower clamping ring (7) are provided inside the slot (15). An upper clamping ring (3) and a lower clamping ring (4) are respectively sleeved on the outer sides of the upper clamping ring (6) and the lower clamping ring (7), and a mounting hole (11) is provided inside the upper clamping ring (3) and the lower clamping ring (4), and a screw rod (9) is inserted inside the mounting hole (11), and a nut (10) is rotatably sleeved on one end of the screw rod (9).

2. A hot-melt socket-and-spigot special pipe fitting for metal-lined plastic pipes according to claim 1, characterized in that: A limiting ring (12) is provided at one end of the screw rod (9), and the outer diameter of the limiting ring (12) is larger than the inner diameter of the mounting hole (11).

3. The hot-melt socket-and-spigot special pipe fitting for metal-lined plastic pipe according to claim 1, characterized in that: The inner walls of the upper clamping ring (6) and the lower clamping ring (7) are both provided with an inserting block (14), and the lower end of the inserting block (14) is sleeved inside the slot (15).

4. The hot-melt socket-and-spigot special pipe fitting for metal-lined plastic pipe according to claim 2, characterized in that: The upper clamping sleeve (3), the lower clamping sleeve (4), the upper clamping ring (6), the lower clamping ring (7) and the inserting block (14) are all in the shape of a semicircular ring.

5. The hot-melt socket-and-spigot special pipe fitting for metal-lined plastic pipe according to claim 1, characterized in that: The inner walls of the upper clamping sleeve (3) and the lower clamping sleeve (4) are both provided with a semicircular ring-shaped clamping block (13), and both ends of the upper clamping ring (6) and the lower clamping ring (7) are provided with an annular clamping groove (16), and one end of the clamping block (13) is inserted into the inside of the clamping groove (16).

6. The hot-melt socket-and-spigot special pipe fitting for metal-lined plastic pipe according to claim 1, characterized in that: A hinge (5) is provided at one end of the upper clamping sleeve (3), and one end of the hinge (5) is rotatably mounted on the lower clamping sleeve (4).

7. The hot-melt socket-and-spigot special pipe fitting for metal-lined plastic pipe according to claim 1, characterized in that: The inner wall of the bell-and-spigot pipe (2) is provided with an annular compensation groove (19).

8. The hot-melt socket-and-spigot special pipe fitting for metal-lined plastic pipe according to claim 1, characterized in that: The inner wall of the bell-and-spigot pipe (2) and the metal-lined plastic pipe body (1) are both provided with corresponding butt joint surfaces (18), the butt joint surfaces (18) are 30 degrees, and the butt joints of the bell-and-spigot pipe (2) and the metal-lined plastic pipe body (1) are both provided with filling grooves (17).

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