Adhesion-free pipe connecting piece for disassembly and replacement

Abstract

The utility model discloses an adhesion-free connecting pipe fitting for disassembly and replacement, which relates to the technical field of pipeline connection and comprises a gland, an elastic sealing ring and a connecting sleeve. The gland comprises an inner threaded pipe and a first limiting ring which are coaxial, and the outer edge of the first limiting ring is fixedly connected with the end of the inner threaded pipe. The connecting sleeve comprises an outer threaded pipe and a second limiting ring which are collinear in axis, the outer threaded pipe is connected with the inner threaded pipe, and the outer edge of the second limiting ring is fixedly connected with the end of the outer threaded pipe; when the external threaded pipe is connected with the internal threaded pipe, the elastic sealing ring is extruded by the first limiting ring and the second limiting ring. The pipe fitting is simple in structure and is only composed of three independent parts, the first three parts do not need to be assembled in advance when the pipe fitting is used, the production technology of the pipe fitting is effectively simplified, and the production speed of the pipe fitting is increased. Secondly, the three parts in the pipe fitting are assembled only through threaded connection of the glands and the connecting sleeves, operation is easy, time and labor are saved, and the time needed for maintaining the drainage pipe through a pipe replacement method can be remarkably shortened.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline connection, and more specifically, to a dismantling and modification free-adhesion connecting pipe fitting. Background Art

[0002] In the prior art, when a plastic drain pipe leaks due to damage or other reasons, a pipe replacement method is usually used to repair the plastic drain pipe. The pipe replacement method is to cut off the damaged pipe and then connect the new pipe to the original position of the damaged pipe by hot-melt butt or electric-melt socket connection. The pipe replacement method requires closing the drain valve first and drying the connection of the new pipe before hot-melt butt or electric-melt socket connection can be performed. The operation is cumbersome and time-consuming.

[0003] Chinese patent CN220688404U provides a socket plug for emergency repair of a plastic drain pipe, which includes a joint body; the joint body includes a joint 1, a joint 2, and a connection structure arranged on the joint 1 and the joint 2 for connecting and fixing the joint 1 and the joint 2; the joint 1 and the joint 2 are provided with a socket for socketing the drain pipe, and a sealing structure is installed in the socket for increasing the connection firmness between the socket and the drain pipe fitting and the sealing of the connection; the connection structure includes a concave platform arranged on the joint 1, a convex platform arranged on the joint 2, and a thread arranged on the convex platform and the concave platform.

[0004] The plug has many parts, and the assembly of the plug parts is complicated during production and use. Therefore, the structure of the plug needs to be further simplified to simplify its production and assembly process and use operation steps. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model aims to provide a non-adhesive connecting pipe fitting for disassembly and modification, which comprises a pressure cap, an elastic sealing ring and a connecting sleeve; the pressure cap comprises an internal threaded tube and a first limiting ring, the first limiting ring is colinear with the axis of the internal threaded tube, and the outer edge of the first limiting ring is fixedly connected to the end of the internal threaded tube; the connecting sleeve comprises an external threaded tube and a second limiting ring, the second limiting ring is colinear with the axis of the external threaded tube, the external threaded tube is used to connect the internal threaded tube, and the outer edge of the second limiting ring is fixedly connected to the end of the external threaded tube away from the first limiting ring; the inner diameter of the first limiting ring is equal to the inner diameter of the second limiting ring; the elastic sealing ring is in contact with the inner wall of the external threaded tube; when the external threaded tube is connected to the internal threaded tube, the elastic sealing ring is squeezed by the first limiting ring and the second limiting ring.

[0006] The utility model is further configured as follows: the connecting sleeve also includes an auxiliary support tube, the auxiliary support tube is colinear with the axis of the external threaded tube, the inner edge of the second limiting ring is fixedly connected to one end of the auxiliary support tube close to the external threaded tube; the inner diameter of the auxiliary support tube is equal to the inner diameter of the first limiting ring.

[0007] The utility model is further configured as follows: the inner side surface of the second limiting ring is a conical surface, and the diameter of the conical surface is the largest on the side close to the external threaded pipe.

[0008] The utility model is further configured as follows: an inverted slope is arranged at one end of the elastic sealing ring close to the second limiting ring, and the inverted slope matches the shape of the conical surface.

[0009] The utility model is further configured as follows: the first limiting ring includes a connecting portion and a limiting portion, the axes of the connecting portion and the limiting portion are colinear, the connecting portion is fixedly connected to the internal threaded tube, and the limiting portion is fixed on the inner side of the connecting portion; when the external threaded tube is connected to the internal threaded tube, the end of the external threaded tube is inserted between the internal threaded tube and the limiting portion, and the elastic sealing ring is squeezed by the limiting portion and the second limiting ring.

[0010] The utility model is further configured as follows: the outer side wall of the internally threaded tube is provided with a protrusion or a groove for increasing the friction force.

[0011] The utility model is further configured as follows: the outer side wall of the internally threaded tube is provided with a protrusion for increasing friction, the length direction of the protrusion is parallel to the axis of the internally threaded tube, a plurality of protrusions are provided, and all the protrusions are evenly distributed around the axis of the internally threaded tube.

[0012] The utility model is further configured as follows: the gland is integrally formed, and the connecting sleeve is integrally formed.

[0013] The utility model is further configured as follows: the gland is a plastic gland, and the connecting sleeve is a plastic connecting sleeve.

[0014] The utility model is further configured as follows: the plastic gland is a polyvinyl chloride gland, and the plastic connecting sleeve is a polyvinyl chloride connecting sleeve.

[0015] In summary, compared with the prior art, the utility model has the following beneficial effects: the utility model has a simple structure, consisting of only three parts: a gland, an elastic sealing ring and a connecting sleeve, and the three parts are independent of each other. The gland, elastic sealing ring and connecting sleeve do not need to be assembled in advance before use, which effectively simplifies the production process of the pipe fitting and improves the production speed of the pipe fitting. Secondly, the gland, elastic sealing ring and connecting sleeve in the pipe fitting are assembled only through the threaded connection between the gland and the connecting sleeve, which is simple to operate, saves time and effort, and can significantly shorten the time required for the drainage pipe replacement method maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of a non-adhesive connecting pipe fitting for dismantling and modification;

[0017] Figure 2It is a cross-sectional schematic diagram of a non-adhesive connecting pipe fitting for dismantling and modification;

[0018] Figure 3 The present invention is a schematic diagram of the usage status of a non-adhesive connecting pipe fitting for dismantling and modification.

[0019] In the figure: 1. gland; 11. internal threaded pipe; 12. first limiting ring; 121. connecting part; 122. limiting part; 13. protrusion; 2. elastic sealing ring; 21. inverted slope; 3. connecting sleeve; 31. external threaded pipe; 32. second limiting ring; 321. conical surface; 33. auxiliary support pipe; 4. original pipe; 5. replacement pipe. DETAILED DESCRIPTION

[0020] The technical solution of the utility model will be clearly described below in conjunction with the accompanying drawings. Obviously, the described embodiments are not all embodiments of the utility model. All other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0021] It should be noted that the terms "center", "up", "down", "horizontal", "left", "right", "front", "back", "lateral", "longitudinal", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.

[0022] Example 1

[0023] like Figure 1-2 As shown, it is a structural schematic diagram of a preferred embodiment of the utility model. This embodiment provides a non-adhesive connecting pipe fitting for disassembly and modification, which includes a pressure cover 1, an elastic sealing ring 2 and a connecting sleeve 3; the pressure cover 1 includes an internal threaded tube 11 and a first limiting ring 12, the first limiting ring 12 is colinear with the axis of the internal threaded tube 11, and the outer edge of the first limiting ring 12 is fixedly connected to the end of the internal threaded tube 11; the connecting sleeve 3 includes an external threaded tube 31 and a second limiting ring 32, the second limiting ring 32 is colinear with the axis of the external threaded tube 31, the external threaded tube 31 is used to connect the internal threaded tube 11, and the outer edge of the second limiting ring 32 is fixedly connected to the end of the external threaded tube 31 away from the first limiting ring 12; the inner diameter of the first limiting ring 12 is equal to the inner diameter of the second limiting ring 32; the elastic sealing ring 2 is in contact with the inner wall of the external threaded tube 31; when the external threaded tube 31 is connected to the internal threaded tube 11, the elastic sealing ring 2 is squeezed by the first limiting ring 12 and the second limiting ring 32.

[0024] When in use, the gland 1 and the connecting sleeve 3 are selected according to the original pipe of the drain pipe and the replacement pipe that needs to be connected to the original pipe. The original pipe and the replacement pipe have the same outer diameter, the original pipe and the replacement pipe have the same inner diameter, and the gland 1 and the connecting sleeve 3 are respectively sleeved on the original pipe and the replacement pipe. Preferably, the gland 1 is clearance-matched with the original pipe or the replacement pipe, and the connecting sleeve 3 is clearance-matched with the original pipe or the replacement pipe. Then the elastic sealing ring 2 is sleeved on the junction of the original pipe and the replacement pipe, and the elastic sealing ring 2 fits tightly with the junction of the original pipe and the replacement pipe for the best result. Then tighten the gland 1 and the connecting sleeve 3, so that the gland 1 and the connecting sleeve 3 squeeze the elastic sealing ring 2, and the elastic sealing ring 2 is deformed and further pressed against the junction of the original pipe and the replacement pipe, so that the original pipe and the replacement pipe can be firmly connected.

[0025] The pipe fitting has a simple structure, consisting of only three parts: a gland 1, an elastic sealing ring 2, and a connecting sleeve 3. The three parts are independent of each other, and the gland 1, the elastic sealing ring 2, and the connecting sleeve 3 do not need to be assembled in advance before use, which effectively simplifies the production process of the pipe fitting and improves the production speed of the pipe fitting. Secondly, the gland 1, the elastic sealing ring 2, and the connecting sleeve 3 in the pipe fitting are assembled only through the threaded connection between the gland 1 and the connecting sleeve 3, which is simple to operate, saves time and effort, and can significantly shorten the time required for the drainage pipe replacement method maintenance.

[0026] Specifically, the connecting sleeve 3 further includes an auxiliary support tube 33, the auxiliary support tube 33 is colinear with the axis of the external threaded tube 31, the inner edge of the second limiting ring 32 is fixedly connected to one end of the auxiliary support tube 33 close to the external threaded tube 31; the inner diameter of the auxiliary support tube 33 is equal to the inner diameter of the first limiting ring 12. The auxiliary support tube 33 can significantly improve the structural reliability of the second limiting ring 32, and reduce the possibility that the second limiting ring 32 is deformed and cannot provide reliable pressure for the elastic sealing ring 2.

[0027] Specifically, the inner side surface of the second limiting ring 32 is a conical surface 321, and the conical surface 321 has the largest diameter on the side close to the external threaded pipe 31. The conical surface 321 helps to squeeze the elastic sealing ring 2 toward the direction close to the connection between the original pipeline and the replacement pipeline, further improving the firmness of the connection between the original pipeline and the replacement pipeline.

[0028] Specifically, an inverted slope 21 is provided at one end of the elastic sealing ring 2 close to the second limiting ring 32, and the inverted slope 21 matches the shape of the conical surface 321, so that each part of the elastic sealing ring 2 in the radial direction is evenly compressed, thereby improving the sealing effect of the deformation of the elastic sealing ring 2 on the connection between the original pipeline and the replacement pipeline.

[0029] Specifically, the first limiting ring 12 includes a connecting portion 121 and a limiting portion 122, the connecting portion 121 and the limiting portion 122 have colinear axes, the connecting portion 121 is fixedly connected to the internal threaded tube 11, and the limiting portion 122 is fixed on the inner side of the connecting portion 121; the inner diameter of the limiting portion 122 is consistent with the inner diameter of the auxiliary support tube 33. When the external threaded tube 31 is connected to the internal threaded tube 11, the end of the external threaded tube 31 is inserted between the internal threaded tube 11 and the limiting portion 122, and the elastic sealing ring 2 is squeezed by the limiting portion 122 and the second limiting ring 32. The limiting portion 122 is equivalent to the thickened area of ​​the first limiting ring 12, which can provide reliable pressure for the elastic sealing ring 2 with the support force provided by the original pipeline or the replacement pipeline, significantly improving the structural reliability of the first limiting ring 12.

[0030] Specifically, the outer side wall of the internal threaded tube 11 is provided with a protrusion 13 or a groove for increasing friction, so as to tighten or loosen the connection between the internal threaded tube 11 and the external threaded tube 31 .

[0031] Specifically, the outer wall of the internally threaded tube 11 is provided with a protrusion 13 for increasing friction, the length direction of the protrusion 13 is parallel to the axis of the internally threaded tube 11, a plurality of protrusions 13 are provided, and all protrusions 13 are evenly distributed around the axis of the internally threaded tube 11. In this embodiment, the edges of the protrusions 13 parallel to the axis of the internally threaded tube 11 are chamfered to improve the grip feel of the operator.

[0032] Specifically, the gland 1 is integrally formed to improve the structural reliability of the gland 1. The connecting sleeve 3 is integrally formed to improve the structural reliability of the connecting sleeve 3.

[0033] Specifically, the gland 1 is a plastic gland, and the connecting sleeve 3 is a plastic connecting sleeve. Compared with metal materials, plastic materials are not easy to corrode and have a longer service life.

[0034] Specifically, the plastic gland is a polyvinyl chloride gland, and the plastic connecting sleeve is a polyvinyl chloride connecting sleeve.

[0035] Specifically, the elastic sealing ring 2 is any one of a polyurethane elastic sealing ring, a polytetrafluoroethylene elastic sealing ring, an acrylic elastic sealing ring, and a rubber elastic sealing ring.

[0036] In summary, the present embodiment has a simple structure, and is composed of only three parts: a gland 1, an elastic sealing ring 2, and a connecting sleeve 3. The three parts are independent of each other, and the gland 1, the elastic sealing ring 2, and the connecting sleeve 3 do not need to be assembled in advance before use, which effectively simplifies the production process of the pipe fitting and improves the production speed of the pipe fitting. Secondly, the gland 1, the elastic sealing ring 2, and the connecting sleeve 3 in the pipe fitting are assembled only through the threaded connection between the gland 1 and the connecting sleeve 3, which is simple to operate, saves time and effort, and can significantly shorten the time required for the drainage pipe replacement method maintenance.

[0037] Example 2

[0038] This embodiment is an application scenario description of the pipe fittings in Embodiment 1. The pipe fittings in Embodiment 1 are generally used in groups of two, such as Figure 3 As shown, two glands 1 are respectively sleeved on the two ends of the replacement pipe 5, and two connecting sleeves 3 are respectively sleeved on the two sections of the original pipe 4. When each gland 1 is connected to its corresponding connecting sleeve 3, the two elastic sealing rings 2 are respectively deformed to press against the connection between the replacement pipe 5 and the two sections of the original pipe 4, and the connection between the replacement pipe 5 and the two sections of the original pipe 4 is completed.

[0039] It should be noted that the positions of the gland 1 and the connecting sleeve 3 in this embodiment are interchangeable.

[0040] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A non-adhesive connecting pipe fitting for dismantling and modification, characterized in that: The invention comprises a gland (1), an elastic sealing ring (2) and a connecting sleeve (3); the gland (1) comprises an internally threaded tube (11) and a first limiting ring (12); the first limiting ring (12) is colinear with the axis of the internally threaded tube (11); the outer edge of the first limiting ring (12) is fixedly connected to the end of the internally threaded tube (11); the connecting sleeve (3) comprises an externally threaded tube (31) and a second limiting ring (32); the second limiting ring (32) is colinear with the axis of the externally threaded tube (31); the outer edge of the first limiting ring (12) is fixedly connected to the end of the internally threaded tube (11); The threaded tube (31) is used to connect the internal threaded tube (11); the outer edge of the second limiting ring (32) is fixedly connected to the end of the external threaded tube (31) away from the first limiting ring (12); the inner diameter of the first limiting ring (12) is equal to the inner diameter of the second limiting ring (32); the elastic sealing ring (2) is in contact with the inner wall of the external threaded tube (31); when the external threaded tube (31) is connected to the internal threaded tube (11), the elastic sealing ring (2) is squeezed by the first limiting ring (12) and the second limiting ring (32).

2. The adhesive-free connecting pipe fitting for dismantling and modification according to claim 1, characterized in that: The connecting sleeve (3) also includes an auxiliary support tube (33), the auxiliary support tube (33) is colinear with the axis of the external threaded tube (31), the inner edge of the second limiting ring (32) is fixedly connected to one end of the auxiliary support tube (33) close to the external threaded tube (31); the inner diameter of the auxiliary support tube (33) is equal to the inner diameter of the first limiting ring (12).

3. The adhesive-free connecting pipe fitting for dismantling and modification according to claim 2, characterized in that: The inner side surface of the second limiting ring (32) is a conical surface (321), and the diameter of the conical surface (321) is the largest on the side close to the external threaded tube (31).

4. The adhesive-free connecting pipe fitting for dismantling and modification according to claim 3, characterized in that: An inverted slope (21) is provided at one end of the elastic sealing ring (2) close to the second limiting ring (32), and the inverted slope (21) matches the shape of the conical surface (321).

5. The adhesive-free connecting pipe fitting for dismantling and modification according to claim 1, characterized in that: The first limiting ring (12) comprises a connecting portion (121) and a limiting portion (122), the axes of the connecting portion (121) and the limiting portion (122) are colinear, the connecting portion (121) is fixedly connected to the internally threaded tube (11), and the limiting portion (122) is fixed on the inner side of the connecting portion (121); when the externally threaded tube (31) is connected to the internally threaded tube (11), the end of the externally threaded tube (31) is inserted between the internally threaded tube (11) and the limiting portion (122), and the elastic sealing ring (2) is squeezed by the limiting portion (122) and the second limiting ring (32).

6. The adhesive-free connecting pipe fitting for dismantling and modification according to claim 1, characterized in that: The outer side wall of the internally threaded tube (11) is provided with a protrusion (13) or a groove for increasing friction.

7. The adhesive-free connecting pipe fitting for dismantling and modification according to claim 6, characterized in that: The outer wall of the internally threaded tube (11) is provided with a protrusion (13) for increasing friction, the length direction of the protrusion (13) is parallel to the axis of the internally threaded tube (11), a plurality of protrusions (13) are provided, and all the protrusions (13) are evenly distributed around the axis of the internally threaded tube (11).

8. The adhesive-free connecting pipe fitting for dismantling and modification according to any one of claims 1 to 7, characterized in that: The gland (1) is integrally formed, and the connecting sleeve (3) is integrally formed.

9. The adhesive-free connecting pipe fitting for dismantling and modification according to any one of claims 1 to 7, characterized in that: The gland (1) is a plastic gland, and the connecting sleeve (3) is a plastic connecting sleeve.

10. The adhesive-free connecting pipe fitting for dismantling and modification according to claim 9, characterized in that: The plastic gland is a polyvinyl chloride gland, and the plastic connecting sleeve is a polyvinyl chloride connecting sleeve.

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