Hot melting connection supporting ring and hot melting connection structure

Abstract

The utility model discloses a hot melting connection support ring and a hot melting connection structure, the hot melting connection support ring comprises an annular body, the annular body is provided with a notch along the axial direction, the annular body comprises a cylinder part, a flaring part is formed at one port of the cylinder part, and the flaring part is gradually expanded back to the cylinder part. According to the utility model, the cylinder part can be sleeved on the inner circumference of the pipe to limit the hot-melt pipe and keep the flatness of the hot-melt welding position, on one hand, the flaring part can be pressed against and positioned with the end part of the pipe, and on the other hand, an annular space can be formed on the outer circumference of the flaring part. Melt can be accommodated in the annular space, so that the surface melt is prevented from forming weld beading on the welding inner circumference.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline connection, and more specifically, to a hot-melt connection support ring and a hot-melt connection structure. Background Art

[0002] PO plastic pipes are typically connected using hot melt. This method heats and melts the contact surfaces of the two parts to be joined, rapidly bonding them together. After cooling and solidifying, the connection is achieved, resulting in high joint strength and a reliable seal. The most common method is socket-and-spigot hot melt. A concave hot melt die head and a convex hot melt die head are inserted into the outer diameter of the pipe's connecting point and the inner diameter of the fitting's socket, respectively. After heating to the hot melt temperature, the pipe is inserted into the fitting's socket to a certain depth, connecting the pipe and fitting together.

[0003] During hot-melt welding, the heated portion melts and softens, causing deformation at the pipe end, which can affect the strength and seal of the welded connection. Furthermore, excessive force applied during pipe insertion can cause the pipe end and the socket to squeeze, causing the molten material at the weld to overflow into the inner circumference of the weld, creating weld nodules on the inner wall. These nodules can affect the pipe's flow resistance, reduce the pipe's flow rate, increase energy consumption, and even cause pipe blockage.

[0004] Therefore, a new solution needs to be proposed to solve this problem. Utility Model Content

[0005] The purpose of the present invention is to overcome the above-mentioned deficiencies of the prior art and to provide a hot melt connection support ring and a hot melt connection structure, which can maintain the flatness of the pipe at the hot melt welding point and avoid the generation of weld nodules at the hot melt welding point.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A hot melt connection support ring comprises an annular body with a notch formed in the axial direction. The annular body comprises a cylindrical portion, a flared portion is formed at one end of the cylindrical portion, and the flared portion gradually expands away from the cylindrical portion.

[0008] The present invention is further configured such that the flared portion is a conical structure.

[0009] The present invention is further configured such that a first toothing portion and a second toothing portion are respectively formed at two sides of the notch of the annular body, and the first toothing portion and the second toothing portion are adapted to each other.

[0010] The present invention is further configured such that the first toothing portion at least forms a recess, the second toothing portion at least partially forms a protrusion, and the second toothing portion can be embedded in the first toothing portion to form an axial limit.

[0011] The present utility model also provides a hot melt connection structure, including a socket and a plug-in connector, the socket including a socket portion, the inner diameter of the socket portion and the outer diameter of the plug-in portion are adapted to each other, and can achieve hot melt connection; it also includes a hot melt connection support ring as mentioned above, the outer diameter of the cylindrical portion and the inner diameter of the plug portion are adapted to each other, the flared portion has a maximum end away from the cylindrical portion, the outer diameter of the maximum end of the flared portion is larger than the inner diameter of the plug portion, and smaller than the outer diameter of the plug portion.

[0012] The present invention is further configured such that the cylindrical portion is inserted into the socket portion, and an annular space is formed between the outer periphery of the flared portion and the end face of the socket portion.

[0013] The present invention is further configured such that an annular stepped portion is provided on the inner periphery of the socket portion, the inner diameter of the stepped portion is smaller than the outer diameter of the connector, and the inner diameter of the stepped portion is smaller than the outer diameter of the largest end of the flared portion.

[0014] The present invention is further configured such that the cylindrical portion is inserted into the socket portion, the socket portion is inserted into the receiver portion, and the flared portion abuts against the stepped portion.

[0015] In summary, the present invention has the following beneficial effects:

[0016] By adopting the above technical solution, the cylindrical portion can be sleeved on the inner circumference of the pipe to limit the position of the heat-melted pipe and maintain the flatness of the heat-melting welding position. The flared portion can not only form a pressure against the end of the pipe to position it, but also form an annular space around the outer circumference of the flared portion. The annular space can accommodate the molten material and prevent the surface molten material from forming weld nodules on the inner circumference of the weld.

[0017] During welding, the sizes of the socket, plug-in connector, and hot melt connection support ring are adapted to each other, allowing for smooth assembly during hot melt welding. An annular stepped portion is provided on the inner periphery of the socket portion, which can self-limit the annular body and the socket portion. The stepped surface of the stepped portion, the inner periphery of the socket portion, the outer periphery of the flared portion, and the end face of the socket portion together enclose the molten material within the annular space, preventing it from entering the inner periphery of the welding position and thus preventing the formation of weld nodules on the inner periphery of the weld. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a three-dimensional diagram of a hot melt connection support ring in this embodiment;

[0019] Figure 2This is a front view of a hot melt connection support ring in this embodiment;

[0020] Figure 3 Schematic diagram of a hot melt connection structure in this embodiment;

[0021] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0022] Figure 5 Schematic diagram of the exploded structure of a hot melt connection structure in this embodiment.

[0023] Reference numerals: annular body 1; cylindrical portion 11; flared portion 12; maximum end 121; notch 13; first toothed portion 14; second toothed portion 15; socket 2; socket portion 21; stepped portion 22; plug-in connector 3; socket portion 31; end face 32; annular space 4. DETAILED DESCRIPTION

[0024] 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.

[0025] This embodiment discloses a hot melt connection support ring, referring to Figure 1 、 Figure 2 As shown, it includes an annular body 1, which is annular in structure and has an axial notch 13. At the notch 13, the annular body 1 can produce a small elastic deformation, thereby allowing the radial size of the annular body 1 to be slightly adjusted to facilitate the adaptation of the hot melt connection joint.

[0026] The annular body 1 needs to be sleeved around the inner periphery of the hot-melt socket 31 to maintain the contour of the socket 31 and prevent deformation of the socket 31 during hot-melt. The annular body 1 needs to have a certain degree of heat resistance and is generally made of metal materials such as stainless steel. Plastic materials with better heat resistance can also be used.

[0027] The annular body 1 is divided into two parts: a cylindrical portion 11 and a flared portion 12. The cylindrical portion 11 and the flared portion 12 are axially connected and integrally formed. The cylindrical portion 11 is generally cylindrical; the flared portion 12 is connected to one end of the cylindrical portion 11 and gradually expands away from the cylindrical portion 11 to form a flared opening. Generally, the flared portion 12 has a conical structure, a quasi-conical flared structure, or an arc-shaped, flanged flared structure.

[0028] The flared portion 12 has a maximum end 121 away from the cylindrical portion 11 . The outer diameter of the maximum end 121 of the flared portion 12 is larger than that of the hot-melt welded socket portion 31 , thereby forming a limit when the annular body 1 is installed.

[0029] A first toothing portion 14 and a second toothing portion 15 are formed on both sides of the notch 13 of the annular body 1. The first toothing portion 14 and the second toothing portion 15 are adapted to each other and fit together to resist axial deviation and ensure the overall stability of the annular body 1.

[0030] The first toothed portion 14 is at least partially recessed, and the second toothed portion 15 is at least partially protruded. The protrusion of the second toothed portion 15 can be embedded in the recess of the first toothed portion 14 to form an axial limit. Alternatively, the first and second toothed portions 14, 15 can also form a mutually staggered sawtooth structure, which can also achieve the function of interlocking and limiting.

[0031] This embodiment also discloses a hot melt connection structure. Based on the above embodiment, Figure 3 、 Figure 4 、 Figure 5 The hot melt connection structure in this embodiment is primarily used for connecting plastic pipes and fittings. By inserting the hot melt connection support ring into the pipe, the contour of the hot melt position can be maintained during hot melt welding, preventing poor welding at the connection position and preventing the formation of nodules on the inner periphery of the welding position that would affect flow resistance.

[0032] In this embodiment, the hot melt connection structure includes a socket part 2, a plug-in connector 3 and a hot melt connection support ring as described above. The socket part 2 includes a socket part 21, the plug-in connector 3 includes a plug-in part 31, and the sizes of the socket part 21, the plug-in part 31 and the hot melt connection support ring are adapted to each other.

[0033] Specifically, the inner diameter of the bell portion 21 matches the outer diameter of the spigot portion 31, allowing the spigot portion 31 to be inserted into the bell portion 21 to achieve a heat-melt connection. The outer diameter of the cylindrical portion 11 matches the inner diameter of the spigot portion 31. Furthermore, the outer diameter of the largest end 121 of the flared portion 12 is larger than the inner diameter of the spigot portion 31, but smaller than the outer diameter of the spigot portion 31.

[0034] The initial outer diameter of the cylindrical portion 11 can be slightly larger than the socket portion 31. During installation, the outer diameter of the cylindrical portion 11 is slightly reduced by extrusion. After the annular body 1 is installed in the socket portion 31, the annular body 1 can elastically offset the inner circumference of the socket portion 31, and tightly adhere to the inner surface of the socket portion 31 through elastic force, which can also prevent the hot melt connection support ring from falling off to a certain extent.

[0035] When the hot melt connection support ring is assembled with the plug connector 3, the cylindrical portion 11 is inserted into the socket portion 31. The larger flared portion 12 is able to press against the end face 32 of the socket portion 31, thereby ensuring proper assembly and positioning. An annular space 4 is formed between the outer periphery of the flared portion 12 and the end face 32 of the socket portion 31. This annular space 4 can accommodate a portion of the hot melt material, preventing it from protruding toward the inner periphery of the hot melt connection and forming a tumor.

[0036] An annular stepped portion 22 is provided on the inner circumference of the bell portion 21. The inner diameter of the stepped portion 22 is smaller than the outer diameter of the connector 3, so that the connector 3 can form an axial blocking position when inserted into the bell portion 21. Furthermore, the inner diameter of the stepped portion 22 is smaller than the outer diameter of the largest end 121 of the flared portion 12, so that the annular body 1 can also be pressed and limited.

[0037] During hot-melt welding, the cylindrical portion 11 of the annular body 1 is first inserted into the socket portion 31, with the flared portion 12 abutting against the end of the socket portion 31 to achieve positioning. The socket portion 31 of the connector 3 is then heated to melt the material. The socket portion 31 of the connector 3 is then inserted into the socket portion 21, with the maximum end 121 of the flared portion 12 abutting against the stepped portion 22, and the end of the socket portion 31 abutting against the outer periphery of the flared portion 12, thereby achieving axial positioning. The stepped surface of the stepped portion 22, the inner periphery of the socket portion 21, the outer periphery of the flared portion 12, and the end face 32 of the socket portion 31 collectively enclose the annular space 4. After the hot-melt material is squeezed, it can accumulate and remain within the annular space 4, preventing it from entering the inner periphery of the hot-melt weld, thus preventing the formation of nodules at the inner periphery of the hot-melt weld that could affect flow resistance.

[0038] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiment. All technical solutions based on the concept of the present invention are within the scope of protection of the present invention. It should be noted that for those skilled in the art, certain improvements and modifications that do not depart from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A hot melt connection support ring, characterized in that: The invention comprises an annular body (1), wherein a notch (13) is provided in the axial direction of the annular body (1), the annular body (1) comprises a cylindrical portion (11), a flared portion (12) is formed at one end of the cylindrical portion (11), and the flared portion (12) gradually expands away from the cylindrical portion (11).

2. The hot melt connection support ring according to claim 1, characterized in that: The flared portion (12) has a conical structure.

3. The hot melt connection support ring according to claim 1, characterized in that: A first toothing portion (14) and a second toothing portion (15) are respectively formed on both sides of the notch (13) of the annular body (1), and the first toothing portion (14) and the second toothing portion (15) are adapted to each other.

4. The hot melt connection support ring according to claim 3, characterized in that: The first toothing portion (14) at least forms a recess, the second toothing portion (15) at least partially forms a protrusion, and the second toothing portion (15) can be embedded in the first toothing portion (14) to form an axial limit.

5. A hot melt connection structure, comprising a socket (2) and a plug connector (3), wherein the socket (2) comprises a socket portion (21), and the plug connector (3) comprises a plug portion (31), wherein the inner diameter of the socket portion (21) and the outer diameter of the plug portion (31) are adapted to each other and can achieve hot melt connection; It is characterized in that It also includes a hot melt connection support ring as described in any one of claims 1 to 4, the outer diameter of the cylindrical portion (11) and the inner diameter of the socket portion (31) are adapted to each other, the flared portion (12) has a maximum end (121) away from the cylindrical portion (11), and the outer diameter of the maximum end (121) of the flared portion (12) is larger than the inner diameter of the socket portion (31) and smaller than the outer diameter of the socket portion (31).

6. The hot melt connection structure according to claim 5, characterized in that: The cylindrical portion (11) is inserted into the socket portion (31), and an annular space (4) is formed between the outer periphery of the expanded portion (12) and the end surface (32) of the socket portion (31).

7. The hot melt connection structure according to claim 5, characterized in that: An annular stepped portion (22) is provided on the inner periphery of the socket portion (21), the inner diameter of the stepped portion (22) being smaller than the outer diameter of the connector (3), and the inner diameter of the stepped portion (22) being smaller than the outer diameter of the maximum end (121) of the flared portion (12).

8. The hot melt connection structure according to claim 7, characterized in that: The cylindrical portion (11) is inserted into the socket portion (31), the socket portion (31) is inserted into the socket portion (21), and the flared portion (12) abuts against the stepped portion (22).

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