Connecting device of galvanized wire pipe

Abstract

The utility model relates to a connecting device of a galvanized wire pipe. The connecting device comprises a corrugated pipe, a connector connected to the end of the corrugated pipe and a locking ring connected to the end of the connector. The two connectors are connected to the ends of the corrugated pipe in a one-to-one correspondence mode. The end, away from the corrugated pipe, of the connector is provided with a plurality of arc-shaped elastic pieces arranged at intervals. The arc-shaped elastic pieces are arranged around the axis of the corrugated pipe so as to form a meshing structure used for being connected with the galvanized wire pipe in a sleeved mode. And the outer side of each arc-shaped elastic sheet is provided with an external thread. The two locking rings are connected to the outer sides of the connectors in a sleeving mode in a one-to-one correspondence mode. And internal threads matched with the arc-shaped elastic sheets are arranged on the inner sides of the locking rings. The feeding depth of the locking ring on the connector is in positive correlation with the meshing force of the meshing structure. The corrugated pipe is used as a core, a structure for locking the end of the galvanized wire pipe is formed through the connector and the locking ring, stable connection can be achieved, disassembly and assembly can be easily achieved, meanwhile, the types of accessories can be reduced, and the construction difficulty can be lowered.

Description

Technical Field

[0001] The utility model relates to the technical field of galvanized wire pipe design, in particular to a connecting device for galvanized wire pipes. Background Art

[0002] A galvanized wire pipe is a metal pipe that has been galvanized and is used to protect wires, usually laid on the ground or on the wall (including surface laying and concealed laying). When laying galvanized wire pipes, multiple galvanized wire pipes need to be connected according to the wiring diagram.

[0003] Regarding the connection methods of galvanized wire pipes, there are currently mainly two types: the first is the socket tightening type (also simply referred to as JDG), where a sleeve is sleeved on the end of the galvanized wire pipe, and then the sleeve and the galvanized wire pipe are locked by radially arranged screws. The second is the socket clamping type (also simply referred to as KBG), where a sleeve is sleeved on the end of the galvanized wire pipe, and then a riveting point for locking the galvanized wire pipe is formed on the inner wall of the sleeve by a clamping device (that is, the thimble of the clamping device presses the side wall of the sleeve from the outside to the inside to make it deform inward to form a riveting point). The disadvantage of the socket tightening type connecting device is that it is usually locked by one or two screws, with few contact points, low connection tightness between the galvanized wire pipe and the sleeve, and a high risk of loosening. The disadvantage of the socket clamping type connecting device is that a clamping device is required, and it is difficult to separate the galvanized wire pipe from the sleeve after installation, making disassembly and assembly inconvenient. In addition, the traditional connecting device for galvanized wire pipes also needs to be configured with elbows at various angles according to the wiring diagram to adapt to the actual application scenario, with a wide variety of accessories and high construction difficulty.

[0004] Therefore, it is necessary to develop a new type of connecting device for galvanized wire pipes, which can not only achieve a stable connection, but also be easily disassembled and assembled. At the same time, it can also reduce the types of accessories and lower the construction difficulty. Content of the Utility Model

[0005] Based on this, the utility model provides a connecting device for galvanized wire pipes, with a corrugated pipe as the core, and a structure for locking the end of the galvanized wire pipe is formed by a connecting head and a locking ring, which can not only achieve a stable connection, but also be easily disassembled and assembled. At the same time, it can also reduce the types of accessories and lower the construction difficulty.

[0006] A connecting device for galvanized wire pipes includes:

[0007] A corrugated pipe;

[0008] A connecting head connected to the end of the corrugated pipe; the number of connecting heads is two and they are connected to the end of the corrugated pipe one by one; a plurality of arc-shaped elastic pieces are arranged at intervals at the end of the connecting head away from the corrugated pipe; each arc-shaped elastic piece is arranged around the axis of the corrugated pipe to form a biting structure for sleeving the galvanized wire pipe; an external thread is provided on the outer side of each arc-shaped elastic piece; and

[0009] A locking ring connected to the end of the connector head; the number of locking rings is two, and they are sleeved on the outside of the connector head in one-to-one correspondence; internal threads matching the arc-shaped elastic pieces are provided on the inner sides of the locking rings; the feeding depth of the locking rings on the connector head is positively correlated with the biting force of the biting structure.

[0010] When using the above-mentioned connecting device for galvanized steel pipes, insert the galvanized steel pipe into the connector head so that the end of the galvanized steel pipe is wrapped by the biting structure formed by the arc-shaped elastic pieces. Then, rotate the locking ring to increase the feeding depth of the locking ring on the connector head, so that the end of the galvanized steel pipe is tightly clamped on the connector head. Since the corrugated pipe has the ability to be bent and deformed, it can be bent at multiple angles, thus replacing elbows with various different angles. Through the above design, with the corrugated pipe as the core, a structure for locking the end of the galvanized steel pipe is formed by the connector head and the locking ring, which can not only achieve a firm connection, but also easily achieve disassembly and assembly. At the same time, it can also reduce the types of fittings and lower the construction difficulty.

[0011] In one embodiment, the corrugated pipe includes: a metal inner pipe and a plastic outer pipe sleeved on the metal inner pipe; the plastic outer pipe is an insulating rubber coating structure attached to the surface of the metal inner pipe. The pipe body structure of metal and plastic can simultaneously meet the requirements of structural strength, corrosion resistance, rust prevention, and insulation safety.

[0012] In one embodiment, a protruding portion for contacting the surface of the galvanized steel pipe is provided on the inner side of the arc-shaped elastic piece. The protruding portion is used to increase the friction coefficient between the arc-shaped elastic piece and the galvanized steel pipe when the arc-shaped elastic piece bites the end of the galvanized steel pipe, and strengthen the connection tightness between the two.

[0013] In one embodiment, the protruding portion is a straight protruding strip that is sequentially and spaced apart along the circumferential direction of the connector head and arranged along the axial direction of the connector head.

[0014] In one embodiment, the protruding portion is an annular or arc-shaped protruding strip that is sequentially and spaced apart along the axial direction of the connector head and arranged along the circumferential direction of the connector head.

[0015] In one embodiment, a rounded corner structure is provided on the inner side of the port at one end of the connector head close to the corrugated pipe. The rounded corner structure can prevent the wire from being scratched at the connection between the connector head and the corrugated pipe when the wire penetrates into the corrugated pipe, and plays a role in protecting the wire.

[0016] In one embodiment, internal threads are provided at both ends of the corrugated pipe; external threads matching the corrugated pipe are provided at one end of the connector head close to the corrugated pipe. By adopting the thread matching method, the detachable connection between the corrugated pipe and the connector head can be realized, which is convenient for disassembly and assembly and is beneficial to later maintenance.

[0017] In one embodiment, an extension portion is provided at one end of the locking ring close to the corrugated pipe; the extension portion is annular and sleeved on the outer side of the end of the corrugated pipe. The extension portion surrounds and protects the outer peripheral side of the connection between the locking ring and the corrugated pipe, improving the sealing performance.

[0018] In one embodiment, the connecting device of the galvanized wire pipe further includes: a locking screw connected between the corrugated pipe and the locking ring; a first locking screw hole is provided at the end of the corrugated pipe; a second locking screw hole is provided on the extension portion; the locking screw is sequentially passed through the second locking screw hole and the first locking screw hole. The locking ring is locked to the end of the corrugated pipe through the locking screw, so that the locking ring will not shrink back and become loose as the service time increases after installation. Description of the Drawings

[0019] Figure 1 A three-dimensional view of the connecting device of the galvanized wire pipe according to an embodiment of the present invention;

[0020] Figure 2 is Figure 1 An exploded view of the connecting device of the galvanized wire pipe shown;

[0021] Figure 3 is Figure 1 A half-sectional view of the connecting device of the galvanized wire pipe shown;

[0022] Figure 4 is Figure 3 A schematic diagram of the corrugated pipe in the connecting device of the galvanized wire pipe shown;

[0023] Figure 5 is Figure 3 A schematic diagram of the connector in the connecting device of the galvanized wire pipe shown;

[0024] Figure 6 is Figure 3 A schematic diagram of the locking ring in the connecting device of the galvanized wire pipe shown;

[0025] Figure 7 is Figure 6 A half-sectional view of the locking ring shown;

[0026] Figure 8 is Figure 1 A schematic diagram of the combination process of the connecting device of the galvanized wire pipe and the galvanized wire pipe shown;

[0027] Figure 9 is Figure 8 A schematic diagram of the connecting device of the galvanized wire pipe and the galvanized wire pipe after assembly shown;

[0028] Figure 10 is Figure 9Partial view of the connection device of the galvanized wire pipe and the galvanized wire pipe after assembly and hiding the locking ring.

[0029] The meanings of the reference numerals in the drawings are as follows:

[0030] 100 - Connection device of the galvanized wire pipe;

[0031] 10 - Bellows, 11 - First locking screw hole;

[0032] 20 - Connector, 21 - Arc-shaped elastic piece, 211 - Protruding part, 22 - Rounded corner structure;

[0033] 30 - Locking ring, 31 - Extension part, 311 - Second locking screw hole;

[0034] 40 - Locking screw;

[0035] 200 - Galvanized wire pipe. Detailed implementation manners

[0036] In order to make the above objects, features, and advantages of the present utility model more obvious and understandable, the following will describe the detailed implementation manners of the present utility model with reference to the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the present utility model. However, the present utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed below.

[0037] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model.

[0038] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present utility model, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0039] In the present utility model, unless otherwise clearly defined and limited, terms such as "installation", "connection", "linkage", "fixation" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral one; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0040] In the present utility model, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature is at a higher horizontal level than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature is at a lower horizontal level than the second feature.

[0041] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only implementation.

[0042] As Figures 1 to 10 shown, it is a connecting device 100 for galvanized steel pipes of an embodiment of the present utility model.

[0043] As Figures 1 to 3 shown, the connecting device 100 for galvanized steel pipes includes: a corrugated pipe 10, a connector 20 connected to the end of the corrugated pipe 10, and a locking ring 30 connected to the end of the connector 20. The number of connectors 20 is two and they are connected to the ends of the corrugated pipe 10 one by one. The number of locking rings 30 is two and they are sleeved on the outside of the connectors 20 one by one. The corrugated pipe 10 is used to provide a bendable function, while the connectors 20 and the locking rings 30 together constitute a structure for connecting the galvanized steel pipes 200.

[0044] Below, in combination with Figures 1 to 10 , the above-mentioned connecting device 100 for galvanized steel pipes will be further described.

[0045] As Figure 4As shown, in this embodiment, the corrugated pipe 10 is in a straight shape in its natural state, has elasticity, and can be bent according to installation requirements, for example, within the range of 0 to 180° (the length of the corrugated pipe 10 needs to meet the corresponding radius of curvature).

[0046] To meet the requirements of structural strength and functionality, the corrugated pipe 10 can be a composite pipe body. For example, in some embodiments, the corrugated pipe 10 may include: a metal inner pipe and a plastic outer pipe sleeved on the metal inner pipe. The plastic outer pipe is an insulating rubber coating structure attached to the surface of the metal inner pipe. The pipe body structure of the metal and plastic structure can simultaneously meet the requirements of structural strength, corrosion resistance, rust prevention, and insulation safety.

[0047] As Figure 5 and Figure 6 shown, in this embodiment, the connector 20 is integrally in a circular ring shape. One end of the connector 20 away from the corrugated pipe 10 is provided with a plurality of arc-shaped elastic pieces 21 arranged at intervals. As shown in FIGS. 5, Figure 6 , and Figure 10 shown, each arc-shaped elastic piece 21 is arranged around the axis of the corrugated pipe 10 to form a biting structure for sleeving the galvanized wire pipe 200. At the same time, as Figure 5 shown, an external thread is provided on the outer side of each arc-shaped elastic piece 21.

[0048] To strengthen the stability of the bite on the end of the galvanized wire pipe 200, the connector 20 can also be improved. For example, a protrusion 211 for contacting the surface of the galvanized wire pipe 200 is provided on the inner side of the arc-shaped elastic piece 21 (the protrusion 211 extends radially inward along the connector 20). The protrusion 211 is used to increase the friction coefficient between the arc-shaped elastic piece 21 and the galvanized wire pipe 200 when the arc-shaped elastic piece 21 bites the end of the galvanized wire pipe 200, and strengthen the connection tightness between the two.

[0049] Furthermore, there can be various specific implementation manners of the protrusion 211.

[0050] For example, as Figure 7 shown, in this embodiment, the protrusion 211 is a straight protrusion strip that is sequentially and spacedly distributed along the circumferential direction of the connector 20 and arranged along the axial direction of the connector 20.

[0051] Again, for example, in other embodiments, the protrusion 211 can be an annular or arc-shaped protrusion strip that is sequentially and spacedly distributed along the axial direction of the connector 20 and arranged along the circumferential direction of the connector 20.

[0052] In addition, to avoid scratches and damage to the inner wall of the connection device 100 of the wire and the galvanized wire pipe, as Figure 6As shown, in this embodiment, a rounded structure 22 is provided on the inner side of the port of the connector 20 close to one end of the corrugated tube 10. The rounded structure 22 can prevent the wire from being scratched at the connection between the connector 20 and the corrugated tube 10 when the wire passes through the corrugated tube 10, thereby protecting the wire.

[0053] In addition, there are many specific ways to connect the bellows 10 and the connector 20, such as welding, threaded adapter connection, riveting, etc. Combination Figure 3 、 Figure 4 , and Figure 5 As shown, taking the threaded adapter connection as an example, in this embodiment, both ends of the bellows 10 are provided with internal threads respectively; the end of the connector 20 close to the bellows 10 is provided with an external thread matching the bellows 10. The threaded matching method can realize the detachable connection between the bellows 10 and the connector 20, which is convenient for disassembly and assembly, and is conducive to later inspection and maintenance.

[0054] If Figure 8 As shown in FIG. 1 , in this embodiment, the locking ring 30 is in the shape of a circular ring as a whole. The inner side of the locking ring 30 is provided with an internal thread matching the arc-shaped spring sheet 21. The feeding depth of the locking ring 30 on the connector 20 is positively correlated with the bite force of the bite structure.

[0055] In order to cope with various harsh usage scenarios, combined with Figure 3 and Figure 7 As shown in FIG. 1 , in this embodiment, an extension portion 31 is provided at one end of the locking ring 30 close to the bellows 10. The extension portion 31 is annular and sleeved on the outer side of the end of the bellows 10. The extension portion 31 surrounds and protects the outer peripheral side of the connection between the locking ring 30 and the bellows 10 to improve the sealing performance.

[0056] Furthermore, considering that the threaded adapter connection may shrink and loosen due to the force between the components after long-term use, if Figures 1 to 3 As shown in , in this embodiment, the galvanized wire pipe connection device 100 may further include: a locking screw 40 connected between the corrugated pipe 10 and the locking ring 30. Accordingly, as Figure 4 As shown in , a first locking screw hole 11 is provided at the end of the bellows 10. As shown in Figure 7 As shown in , a second locking screw hole 311 is formed on the extension portion 31. As shown in Figure 3 As shown in , the locking screw 40 is sequentially inserted into the second locking screw hole 311 and the first locking screw hole 11 (see Figure 3 and Figure 10 , the locking screw 40 does not pass through the connector 20, thereby ensuring the sealing of the connection). The locking ring 30 is locked at the end of the bellows 10 by the locking screw 40, so that the locking ring 30 will not shrink and loosen as the use time increases after installation. ​​​​

[0057] In addition, in some embodiments, the galvanized wire conduit 200 may further include: a sealing ring installed on the connector 20. The sealing ring is an elastic rubber ring, and the sealing ring is located inside the arc-shaped elastic piece 21. In addition, the length of the sealing ring is preferably equal to the length of the arc-shaped elastic piece 21, which is conducive to providing a more stable connection effect.

[0058] Brief description of the working principle:

[0059] As Figures 8 to 10 shown, when in use, insert the galvanized wire conduit 200 into the connector 20, so that the end of the galvanized wire conduit 200 is wrapped by the clamping structure formed by the arc-shaped elastic piece 21. Then, by rotating the locking ring 30 to increase the feeding depth of the locking ring 30 on the connector 20 (that is, pre-sleeve the locking ring 30 on the galvanized wire conduit 200, and when the galvanized wire conduit 200 penetrates into the connector 20, rotate the locking ring 30 to make the locking ring 30 move forward towards the end close to the corrugated pipe 10), the end of the galvanized wire conduit 200 is tightly clamped on the connector 20. Since the corrugated pipe 10 has the ability to bend and deform, multi-angle bending can be achieved, thus replacing elbows with various different angles.

[0060] The above-mentioned connecting device 100 of the galvanized wire conduit, with the corrugated pipe 10 as the core, forms a structure for locking the end of the galvanized wire conduit 200 through the connector 20 and the locking ring 30. It can not only achieve a stable connection, but also be easily disassembled and assembled. At the same time, it can also reduce the types of accessories and the construction difficulty.

[0061] In addition, when the corrugated pipe is installed in a straight shape, the corrugated pipe has the ability to expand and contract along the axial direction of the galvanized wire conduit. Therefore, the connecting device 100 of the galvanized wire conduit can also be used as an expansion joint.

[0062] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0063] The above embodiments only represent the preferred embodiments of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the utility model patent shall be subject to the appended claims.

Claims

1. A connection device for galvanized wire pipe, characterized in that: include: Bellows; A connector connected to the end of the corrugated pipe; the number of the connectors is two and they are connected to the ends of the corrugated pipe in a one-to-one correspondence; a plurality of arc-shaped spring pieces are arranged at intervals at one end of the connector away from the corrugated pipe; each arc-shaped spring piece is arranged around the axis of the corrugated pipe to form a bite structure for sleeve-connecting the galvanized wire pipe; an external thread is arranged on the outer side of each arc-shaped spring piece; and A locking ring is connected to the end of the connector; there are two locking rings, which are sleeved on the outside of the connector in a one-to-one manner; the inner sides of the locking rings are provided with internal threads that match the arc-shaped spring sheets; the feeding depth of the locking ring on the connector is positively correlated with the bite force of the bite structure.

2. The connecting device of galvanized wire pipe according to claim 1, characterized in that: The corrugated tube comprises: a metal inner tube and a plastic outer tube sleeved on the metal inner tube; the plastic outer tube is an insulating rubber-coated structure attached to the surface of the metal inner tube.

3. The connecting device of galvanized wire pipe according to claim 1, characterized in that: The inner side of the arc-shaped spring piece is provided with a protruding portion for contacting the surface of the galvanized wire pipe.

4. The connecting device for galvanized wire pipe according to claim 3, characterized in that: The protruding portions are linear protruding strips that are distributed in sequence and spaced apart along the circumference of the connector and are arranged along the axial direction of the connector.

5. The connecting device for galvanized wire pipe according to claim 3, characterized in that: The protruding portions are annular or arc-shaped protruding strips that are distributed in sequence along the axial direction of the connector and arranged along the circumference of the connector.

6. The connecting device of galvanized wire pipe according to claim 1, characterized in that: A rounded structure is provided on the inner side of a port of the connector close to one end of the corrugated pipe.

7. The connecting device of galvanized wire pipe according to claim 1, characterized in that: Both ends of the bellows are provided with internal threads respectively; and one end of the connector close to the bellows is provided with external threads matching the bellows.

8. The connecting device for galvanized wire pipe according to claim 7, characterized in that: An extension portion is provided at one end of the locking ring close to the bellows; the extension portion is annular and sleeved on the outer side of the end of the bellows.

9. The connecting device for galvanized wire pipe according to claim 8, characterized in that: Also includes: A locking screw is connected between the bellows and the locking ring; a first locking screw hole is opened at the end of the bellows; a second locking screw hole is opened on the extension portion; and the locking screw is sequentially inserted into the second locking screw hole and the first locking screw hole.

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