Pipe casting self-locking anti-dropping structure

Abstract

The utility model provides a cast pipe self -locking formula prevents the structure of falling off belongs to pipeline processing technical field, including cast pipe and plug, and the cast pipe end part is equipped with the socket, and the socket is used for placing the plug, and the socket still has the let -by ring groove to the one end far from the cast pipe end face, and the plug is equipped with a plurality of air bags, and the one end far from the plug of every air bag is located in the let -by ring groove, and the lateral wall of air bag can resist the inner wall surface in the let -by ring groove after inflation, and the air bag and the let -by ring groove inner wall surface still have the let -by space, the utility model can not produce the horizontal movement in the cast pipe after the plug of air bag inflation, and then can guarantee the quality of cast pipe inner wall coating cement mortar layer.

Description

Technical Field

[0001] This utility model relates to the field of pipeline processing equipment technology, specifically to a self-locking anti-detachment structure for cast pipes. Background Technology

[0002] When lining the inner wall of a cast iron pipe (i.e., ductile iron pipe) with cement mortar, in order to prevent the mortar from overflowing, the socket and spigot ends of the cast iron pipe are sealed with plugs consisting of a plug skeleton and air-filled tape. Then, a feeding device is used to feed cement mortar into the cast iron pipe through the feeding hole set in the middle of the mud-blocking surface of the plug skeleton. The power mechanism drives the cast iron pipe to rotate at high speed, and under the action of centrifugal force, a cement protective layer is formed on the inner wall of the cast iron pipe.

[0003] Because casting defects such as iron and sand adhering to the vertical surface of cast pipe sockets are common, the expansion of the inflatable tape after inflation can easily cause the plug skeleton to shift outward due to uneven contact surfaces, creating gaps. This results in an uneven coating surface formed by cement mortar at the socket, requiring manual repair and reshaping, which not only increases production steps but also significantly raises manufacturing costs. Utility Model Content

[0004] In view of this, the present invention provides a self-locking anti-detachment structure for cast pipes. The present invention can prevent the plug from moving laterally inside the cast pipe after the airbag is inflated, thereby ensuring the quality of the cement mortar lining layer on the inner wall of the cast pipe.

[0005] To solve the above-mentioned technical problems, this utility model provides a self-locking anti-detachment structure for cast pipes, including a cast pipe and a plug. The end of the cast pipe is provided with a socket for placing the plug. The end of the socket away from the end face of the cast pipe also has a relief annular groove. The plug is provided with several air bladders. The end of each air bladder away from the plug is located in the relief annular groove. After the air bladder is inflated, its side wall can abut against the inner wall of the relief annular groove. The air bladder and the inner wall of the relief annular groove also have a relief space. After the air bladder is inflated, it can fill the relief space to avoid abutting against the inner wall of the relief annular groove and pushing the plug outward.

[0006] The relief ring groove has an L-shaped cross-section, with one side arranged at an angle to abut against the airbag near the end face of the cast pipe, preventing the airbag from moving laterally out of the relief ring groove after inflation.

[0007] The corner of the relief ring groove cross section is chamfered.

[0008] The side of the plug closest to the end face of the cast pipe is also provided with multiple support plates. After the air bag is inflated, the end of the support plate away from the plug will abut against the inner wall of the socket. The support plate can further fix the position of the plug.

[0009] Multiple support plates are arranged in a circular array along the axis of the plug.

[0010] Each bracket is hinged to the plug, making it easy to place the plug into the socket.

[0011] In summary, compared with the prior art, this application includes at least one of the following beneficial technical effects:

[0012] 1. Improved quality of coated end face forming:

[0013] The airbag adopts an L-shaped relief groove and chamfered structure design, and after inflation, the sidewall of the airbag and the relief groove form an adaptive fit. Even if there are casting defects such as iron or sand adhering to the socket of the cast pipe, the airbag can still fill the gap by expansion, eliminating the phenomenon of plug displacement, ensuring that the cement mortar forms a smooth coating end face at the socket, greatly reducing manual repair procedures and reducing manufacturing costs.

[0014] 2. The brace and airbag work together to form dual fixation:

[0015] After the airbag is inflated, it presses against the inner wall of the clearance groove, using friction to suppress the lateral displacement of the plug.

[0016] When the airbag inflates, the support plate presses against the inner wall of the socket, and the mechanical limit further prevents the plug from being thrown out during high-speed centrifugation, thus completely eliminating safety hazards.

[0017] 3. Structural reliability and adaptability optimization:

[0018] The inclined surface design of the L-shaped relief ring groove can effectively constrain the lateral movement of the airbag and prevent the airbag from coming out of the relief ring groove.

[0019] The chamfered structure reduces stress concentration during airbag inflation, extending the airbag's service life.

[0020] The support plates are arranged in a circular array along the axis of the plug to ensure uniform force distribution; the hinged connection method simplifies the plug assembly process and improves production efficiency. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the self-locking anti-detachment structure for cast pipe according to the present invention;

[0022] Figure 2 This is a schematic diagram of the structure of the plug and support plate of this utility model;

[0023] Figure 3 This is a schematic diagram of the prior art of this utility model.

[0024] Explanation of reference numerals in the attached figures:

[0025] 10. Cast iron pipe; 11. Socket; 12. Relief ring groove;

[0026] 20. End cap; 21. Airbag; 22. Support plate. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the following will be described in conjunction with the appendices of the embodiments of this utility model. Figure 1-2 The technical solutions of the embodiments of this utility model are clearly and completely described herein. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of this utility model are within the protection scope of this utility model.

[0028] This embodiment provides a self-locking anti-detachment structure for cast pipe 10, such as Figure 1 , 2 As shown: The system includes a cast pipe 10 and a plug 20. The inner end of the cast pipe 10 has a socket, and each socket can accommodate one plug 20. The plug 20 includes a circular baffle with a diameter equal to the inner diameter of the cast pipe 10. A connecting ring is coaxially mounted on one side of the circular baffle. The connecting ring has a T-shaped cross-section, and an annular receiving space is formed between the outer diameter of the connecting ring and the circular baffle. An airbag 21 is placed within this receiving space. The airbag is annular (multiple airbags can also be used to form an annular structure to seal the socket). The inflation nozzle of the airbag 21 is located on the side closest to the connecting ring, and the end of the airbag 21 furthest from the plug 20 is located inside the socket 11. The plug 20... When placed, the circular baffle is located near the center of the cast pipe 10, and a clearance annular groove 12 is formed at the end of the socket 11 away from the end face of the cast pipe 10. Both the clearance annular groove 12 and the socket 11 are annular structures. One end of the airbag 21 is located in the receiving space, and the other end is located in the clearance annular groove 12. After the airbag 21 is inflated, the side wall of the airbag 21 can abut against the wall of the clearance annular groove 12. In this way, the airbag 21 and the circular baffle can cooperate to seal the inner hole of the cast pipe 10. After the airbag 21 is inflated, a clearance space is also formed in the clearance annular groove 12. In this way, after the airbag 21 is over-inflated, the airbag 21 will expand into the clearance space, so the airbag 21 will not push the plug 20 as a whole to move towards the end face of the cast pipe 10.

[0029] Preferably, the clearance annular groove 12 has an L-shaped cross-section, and one side is arranged at an inclination. This inclination is located on the side of the airbag 21 away from the plug 20. The distance between the end of the inclination near the middle of the casting pipe 10 and the axis of the casting pipe 10 is greater than the distance between the end of the inclination near the end face of the casting pipe 10 and the axis of the casting pipe 10. The side of the airbag 21 can abut against one point of the inclination, so that when the airbag 21 is inflated, the clearance annular groove 12 can prevent the airbag 21 from driving the plug 20 to move toward the end face of the casting pipe 10.

[0030] Specifically, the corner of the relief ring groove section is a chamfered structure. The chamfered structure allows the airbag 21 to expand into the chamfered structure when it is inflated, and it can also reduce the stress concentration when the airbag 21 expands, thus extending the service life of the airbag 21.

[0031] Furthermore, the side of the plug 20 closest to the end face of the cast pipe 10 is also provided with multiple support plates 22 in a ring array, such as... Figure 2 As shown: The end of the support plate 22 away from the plug 20 is a planar structure, that is, after the air bag 21 is inflated, the side of the support plate 22 away from the plug 20 can abut against the inner wall of the socket 11, thereby preventing the plug 20 from moving towards the end face of the cast pipe 10. Thus, in conjunction with the relief ring groove 12, it can further ensure the sealing stability of both ends of the cast pipe 10 when the inner wall of the cast pipe 10 is sprayed with mortar.

[0032] Preferably, each bracket is fixed to the plug 20 by hinge, which makes it easy to place the plug 20 into the socket 11.

[0033] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0034] The above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. A self-locking anti-detachment structure for cast pipes, characterized in that, The device includes a cast pipe (10) and a plug (20). The end of the cast pipe (10) is provided with a socket (11). The socket (11) is used to place the plug (20). The end of the socket (11) away from the end face of the cast pipe (10) also has a relief annular groove. The plug (20) is provided with several air bladders (21). The end of each air bladder (21) away from the plug (20) is located in the relief annular groove. After the air bladder (21) is inflated, its side wall can abut against the inner wall of the relief annular groove (12). The air bladder (21) and the inner wall of the relief annular groove also have a relief space.

2. The self-locking anti-detachment structure for a cast pipe (10) as described in claim 1, characterized in that, The relief groove (12) has an L-shaped cross-section, with one side arranged at an angle to abut against the end face of the airbag (21) near the casting tube (10) to prevent the airbag (21) from moving laterally out of the relief groove.

3. The self-locking anti-detachment structure for a cast pipe (10) as described in claim 2, characterized in that, The corner of the relief ring groove cross section has a chamfered structure.

4. A self-locking anti-detachment structure for a cast pipe (10) as described in any one of claims 1-3, characterized in that, The plug (20) is provided with multiple support plates (22) on the side near the end face of the cast pipe (10). After the airbag (21) is inflated, the end of the support plate (22) away from the plug (20) will abut against the inner wall of the socket (11).

5. The self-locking anti-detachment structure for a cast pipe (10) as described in claim 4, characterized in that, Multiple support plates (22) are arranged in a ring array along the axis of the plug (20).

6. The self-locking anti-detachment structure for a cast pipe (10) as described in claim 4, characterized in that, Each bracket is connected to the plug (20) by a hinge.

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