A tee structure device

Abstract

The utility model discloses a tee pipe structure device relates to pipeline connection technical field, including the hollow main pipe and the pipe, the lateral wall of main pipe is equipped with the intercommunication mouth for with the pipe assembly, the circumference of intercommunication mouth is equipped with a plurality of first positioning structure, the end of pipe is the intercommunication end matched with intercommunication mouth, the circumference of intercommunication end is equipped with a plurality of second positioning structure, the first positioning structure is positioning groove / positioning protruding, the second positioning structure is positioning protruding / positioning groove, the first positioning structure can be mutually matched with second positioning structure and form the concave-convex interface mechanism, the tee pipe structure device provided by the utility model, through the positioning design of concave-convex interface mechanism, has guaranteed the accurate alignment of main pipe and pipe in the assembly process, avoided the deviation due to thermal deformation in the welding process, provided additional support point again, reduced the influence of welding stress to the structure, made the weld quality improve, reduced the leakage risk.

Description

Technical Field

[0001] This utility model relates to the field of pipe connection technology, specifically to a three-way pipe structure device. Background Technology

[0002] In the field of medical negative pressure pipeline connector manufacturing, tees, as key components connecting main and branch pipes, face significant technical challenges in automated welding processes. Current technologies for thin-walled stainless steel tees (wall thickness δ≤5mm) suffer from the following shortcomings: 1. Lack of precise positioning benchmarks: Traditional tee designs do not consider the positioning benchmarks required for automated welding, resulting in welding equipment's inability to automatically identify and position the tees, affecting welding accuracy. 2. Difficulty in controlling welding thermal deformation: Due to its poor thermal conductivity and high coefficient of linear expansion, stainless steel is prone to significant localized thermal deformation during welding. This deformation is particularly pronounced for thin-walled pipes, reaching 0.3–0.5mm, far exceeding the tolerance range (±0.05–0.2mm) required for automated welding. This not only affects welding quality and pipe geometric accuracy but may also lead to stress concentration during welding, impacting pipe lifespan and safety. These issues necessitate manual welding of tees, increasing auxiliary process time and reducing production efficiency. Manual welding also suffers from inconsistent weld aesthetics and uniformity, limiting mass production capacity and market competitiveness.

[0003] Therefore, an innovative structural design is urgently needed to overcome the problems of missing positioning reference, difficulty in controlling thermal deformation, and inability to achieve high-precision mass production during automated welding of thin-walled tees, so as to meet the stringent requirements of medical negative pressure pipeline connectors for precision and production efficiency. Utility Model Content

[0004] The purpose of this utility model is to address the aforementioned problems by providing a three-way pipe structure device. Through the positioning design of the concave-convex interface mechanism, it ensures the precise alignment of the main pipe and the piping during assembly, avoids displacement caused by thermal deformation during welding, provides additional support points, reduces the impact of welding stress on the structure, significantly improves weld quality, and reduces the risk of leakage.

[0005] The technical solution adopted in this utility model is as follows:

[0006] A three-way pipe structure includes a hollow main pipe and a connecting pipe. The side wall of the main pipe is provided with a communication port for assembly with the connecting pipe. The circumferential direction of the communication port is provided with a plurality of first positioning structures. The end of the connecting pipe is a connecting end that matches the communication port. The circumferential direction of the connecting end is provided with a plurality of second positioning structures. The first positioning structure is a positioning groove / positioning protrusion, and the second positioning structure is a positioning protrusion / positioning groove. The first positioning structure can cooperate with the second positioning structure to form a concave-convex interface mechanism.

[0007] By employing the aforementioned technical solution, a first positioning structure is set circumferentially at the connection port of the main pipe, and a second positioning structure is set circumferentially at the connection end of the piping, achieving precise positioning of the main pipe and piping using a concave-convex interface mechanism. This design provides a reliable positioning reference for automated welding, solving the problem of missing positioning reference in automated welding of traditional tee pipe structures, significantly improving welding accuracy and efficiency. Furthermore, the concave-convex interface mechanism provides additional support points at the connection between the main pipe and piping, reducing the impact of welding stress on the structure, significantly improving weld quality, and reducing the risk of leakage.

[0008] Furthermore, the diameter D1 of the connecting port is calculated using the following formula (1):

[0009] D1=D2-2δ2-t1 (1)

[0010] In equation (1), D2 is the outer diameter of the pipe, δ2 is the wall thickness of the pipe, and t1 is the clearance adjustment amount.

[0011] By adopting the above technical solution, the diameter of the connecting port can be calculated using formula (1), ensuring a reasonable assembly gap between the piping and the main pipe, thereby avoiding welding quality problems caused by excessive or insufficient gap. This design takes into account wall thickness and gap adjustment to achieve optimal welding conditions, effectively reducing welding defects caused by dimensional mismatch.

[0012] Furthermore, the first positioning structure is a positioning groove, the groove opening of which corresponds to the inner circle where the connecting opening is located, and the groove bottom of which corresponds to the outer circle surrounding the inner circle. The diameter D3 of the outer circle is calculated using the following formula (2):

[0013] D3=D2+t2 (2)

[0014] In equation (2), t2 is the radial gap of the weld.

[0015] Because of the above technical solution, the calculation of the outer diameter takes into account the welding radial clearance, ensuring the continuity and integrity of the weld during welding.

[0016] Furthermore, the groove width W1 of the positioning groove is calculated using the following formula (3):

[0017] W1=2.5δ1+t1 (3)

[0018] In equation (3), δ1 is the wall thickness of the main pipe;

[0019] The width W2 of the positioning protrusion is calculated using the following formula (4):

[0020] W2=2.5δ1 (4)

[0021] In equation (4), δ1 is the wall thickness of the main pipe.

[0022] By adopting the above technical solution, the groove width of the positioning groove and the protrusion width of the positioning protrusion are calculated by equations (3) and (4) respectively, forming a stable contact interface. This ensures the fitting accuracy of the concave-convex interface mechanism and effectively suppresses welding thermal deformation. This design makes the welded tee pipe structure more robust and improves the overall strength and pressure resistance of the product.

[0023] Furthermore, the height h of the positioning protrusion is equal to the wall thickness δ1 of the main pipe.

[0024] Thanks to the above technical solution, the positioning protrusion can be fully embedded in the positioning groove during assembly, forming a stable mechanical connection.

[0025] Furthermore, the two positioning grooves are disposed opposite to each other on both sides of the connecting port, and the two positioning protrusions are disposed on both sides of the connecting end of the pipe, with the positioning grooves and positioning protrusions corresponding one-to-one.

[0026] By employing the aforementioned technical solution, and through the symmetrical arrangement of the positioning grooves and protrusions, ensuring a one-to-one correspondence, good alignment between the main pipe and the piping during assembly can be guaranteed. This design not only improves assembly efficiency but also provides a reliable benchmark for automated welding, thereby significantly enhancing production efficiency and product quality.

[0027] Furthermore, the main pipe and piping are made of austenitic stainless steel.

[0028] By adopting the above technical solution and selecting austenitic stainless steel as the material for both main pipes and piping, the corrosion resistance and mechanical properties of the pipelines can be significantly improved. This material selection, combined with the structural characteristics of thin-walled tees, further enhances the service life and reliability of the pipelines in medical negative pressure systems.

[0029] Furthermore, the wall thickness δ2 of the piping and the wall thickness δ1 of the main pipe are both less than or equal to 5 mm, and the wall thickness δ2 of the piping is less than or equal to the wall thickness δ1 of the main pipe.

[0030] By adopting the above technical solution, and by strictly controlling the wall thickness of the main pipe and the piping, and ensuring that the wall thickness of the piping does not exceed that of the main pipe, thermal deformation during the welding process can be effectively reduced.

[0031] Furthermore, the value of t1 is 0.15±0.5mm.

[0032] By adopting the above technical solution, the appropriate gap adjustment takes into account the thermal expansion coefficient of the material and the thermal deformation during the welding process, ensuring the dimensional consistency of the welded products, improving the assembly efficiency and welding quality, and reducing the defect rate.

[0033] Furthermore, the value of t2 is 0.1 ± 0.02 mm.

[0034] By adopting the above technical solution, the appropriate welding radial gap takes into account the requirements of the welding process, ensuring the continuity and aesthetics of the weld.

[0035] The beneficial effects of this utility model are: In the assembly and welding process, the three-way pipe structure device of this utility model achieves high-precision automated welding through carefully designed positioning grooves and positioning protrusions, as well as reasonable size calculations and material selection, which improves welding quality and production efficiency, reduces costs, and ensures the reliability and durability of the product, making it suitable for a variety of application scenarios. Attached Figure Description

[0036] Figure 1 This is a structural schematic diagram of the three-way pipe structure device of this utility model;

[0037] Figure 2 This is a top view of the main body of this utility model;

[0038] Figure 3 This is a schematic diagram of the branch pipe of this utility model;

[0039] Figure 4 This is a front view of the branch pipe of this utility model;

[0040] Figure 5 This is a front view of the assembly of the main pipe and branch pipe of this utility model;

[0041] Figure 6 This is a cross-sectional view of the assembly of the main pipe and branch pipe of this utility model;

[0042] Figure 7 This is a schematic diagram of the structure of a three-way pipe device according to another embodiment of this utility model.

[0043] The markings in the diagram are: 10-main pipe, 11-connection port, 111-first positioning structure, 20-piping, 21-connection end, 211-second positioning structure. Detailed Implementation

[0044] The present invention will now be described in detail with reference to the accompanying drawings.

[0045] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0046] Example 1

[0047] A three-way pipe structure device, such as Figures 1-6 As shown, the device includes a hollow main pipe 10 and a piping 2. The side wall of the main pipe 10 is provided with a connecting port 11 for assembly with the piping 2. The connecting port 11 is provided with two first positioning structures 111 in the circumferential direction. The end of the piping 2 is a connecting end 21 that matches the connecting port 11. The connecting end 21 is provided with two second positioning structures 211 in the circumferential direction. The first positioning structure 111 is a positioning groove that is radially outward along the connecting port 11. The second positioning structure 211 is a positioning protrusion that is axially outward along the piping 2. The first positioning structure 111 and the second positioning structure 211 can cooperate with each other to form a concave-convex interface mechanism.

[0048] Specifically, by setting a first positioning structure 111 circumferentially at the connection port 11 of the main pipe 10 and a second positioning structure 211 circumferentially at the connection end 21 of the piping 2, the concave-convex interface mechanism achieves precise positioning of the main pipe 10 and the piping 2. This design provides a reliable positioning reference for automated welding, solves the problem of missing positioning reference in automated welding of traditional tee pipe structures, and significantly improves welding accuracy and efficiency. In addition, the concave-convex interface mechanism provides additional support points at the connection between the main pipe 10 and the piping 2, reduces the impact of welding stress on the structure, significantly improves weld quality, and reduces the risk of leakage.

[0049] The diameter D1 of the connecting port 11 is calculated using the following formula (1):

[0050] D1=D2-2δ2-t1 (1)

[0051] In equation (1), D2 is the outer diameter of pipe 2, δ2 is the wall thickness of pipe 2, and t1 is the clearance adjustment amount.

[0052] Specifically, by calculating the diameter of the connecting port 11 using formula (1), it is possible to ensure that the assembly gap between the piping 2 and the main pipe 10 is reasonable, thereby avoiding welding quality problems caused by excessive or insufficient gap. This design takes into account wall thickness and gap adjustment to achieve optimal welding conditions and effectively reduces welding defects caused by size mismatch.

[0053] The first positioning structure 111 is a positioning groove. The groove opening corresponds to the inner circle where the connecting port 11 is located, and the groove bottom corresponds to the outer circle surrounding the inner circle. The diameter D3 of the outer circle is calculated using the following formula (2):

[0054] D3=D2+t2 (2)

[0055] In equation (2), t2 is the radial gap of the weld.

[0056] Specifically, the calculation of the outer diameter takes into account the radial clearance of the weld, ensuring the continuity and integrity of the weld during welding.

[0057] The groove width W1 of the positioning groove is calculated using the following formula (3):

[0058] W1=2.5δ1+t1 (3)

[0059] In equation (3), δ1 is the wall thickness of the main pipe (10).

[0060] The width W2 of the positioning protrusion is calculated using the following formula (4):

[0061] W2=2.5δ1 (4)

[0062] In equation (4), δ1 is the wall thickness of the main pipe.

[0063] Specifically, by calculating the groove width of the positioning groove and the protrusion width of the positioning protrusion using equations (3) and (4) respectively, a stable contact interface is formed, which can ensure the fitting accuracy of the concave-convex interface mechanism and effectively suppress welding thermal deformation. This design makes the welded tee pipe structure more robust and improves the overall strength and pressure resistance of the product.

[0064] The height h of the positioning protrusion is equal to the wall thickness δ1 of the main pipe 10.

[0065] Specifically, this ensures that the positioning protrusion can be fully embedded in the positioning groove during assembly, forming a stable mechanical connection.

[0066] Two positioning grooves are disposed opposite each other on both sides of the connecting port 11, and two positioning protrusions are disposed on both sides of the connecting end 21 of the pipe 2, with each positioning groove corresponding to a different positioning protrusion. In other embodiments, the positioning accuracy and structural strength can be further improved by increasing the number of positioning grooves and positioning protrusions, such as by using a structure with four or six symmetrically arranged grooves, thereby solving the positioning problem under high precision requirements.

[0067] Specifically, by aligning the positioning grooves and protrusions one-to-one, good alignment between the main pipe 10 and the piping 2 can be ensured during assembly. This design not only improves assembly efficiency but also provides a reliable benchmark for automated welding, thereby significantly improving production efficiency and product quality.

[0068] The main pipe 10 and the piping 2 are made of austenitic stainless steel.

[0069] Specifically, the use of austenitic stainless steel as the material for both the main pipe (10) and the piping (2) significantly improves the corrosion resistance and mechanical properties of the pipes. This material selection, combined with the structural characteristics of thin-walled tees, further enhances the service life and reliability of the pipes in medical negative pressure systems.

[0070] The wall thickness δ2 of the piping 2 is 4.5 mm, and the wall thickness δ1 of the main pipe 10 is 5 mm.

[0071] Specifically, by strictly controlling the wall thickness of the main pipe 10 and the piping 2, and ensuring that the wall thickness of the piping 2 does not exceed the wall thickness of the main pipe 10, thermal deformation during the welding process can be effectively reduced.

[0072] The value of t1 is 0.15 mm.

[0073] Specifically, the appropriate gap adjustment takes into account the thermal expansion coefficient of the material and the thermal deformation during the welding process, ensuring the dimensional consistency of the product after welding, improving the assembly efficiency and welding quality of the product, and reducing the defect rate.

[0074] The value of t2 is 0.1 mm.

[0075] Specifically, an appropriate radial gap in the welding process takes into account the requirements of the welding process, ensuring the continuity and aesthetics of the weld.

[0076] Example 2

[0077] Example 2 replaces the first positioning structure 111 and the second positioning structure 211 in Example 1; further explanation: identical components will not be described again here, such as... Figure 7 As shown, the first positioning structure 111 is a positioning protrusion that faces radially inward along the connecting port 11, and the second positioning structure 211 is a positioning groove that faces inward along the axial direction of the pipe 2.

[0078] This document uses specific embodiments to illustrate the principles and implementation methods of this utility model. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core ideas of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principles of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

[0079] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0080] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" 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 based on the specific circumstances.

Claims

1. A three-way pipe structure device, characterized in that, The device includes a hollow main pipe and a conduit. The main pipe has a communication port on its side wall for assembly with the conduit. The communication port has multiple first positioning structures circumferentially arranged. The end of the conduit is a communication end that matches the communication port. The communication end has multiple second positioning structures circumferentially arranged. The first positioning structure is a positioning groove / positioning protrusion, and the second positioning structure is a positioning protrusion / positioning groove. The first positioning structure and the second positioning structure can cooperate with each other to form a concave-convex interface mechanism.

2. The three-way pipe structure device as described in claim 1, characterized in that, The diameter D1 of the connecting port is calculated using the following formula (1): D1=D2-2δ2-t1 (1) In equation (1), D2 is the outer diameter of the pipe, δ2 is the wall thickness of the pipe, and t1 is the clearance adjustment amount.

3. The three-way pipe structure device as described in claim 2, characterized in that, The first positioning structure is a positioning groove. The groove opening corresponds to the inner circle where the connecting opening is located, and the groove bottom corresponds to the outer circle surrounding the inner circle. The diameter D3 of the outer circle is calculated using the following formula (2): D3=D2+t2 (2) In equation (2), t2 is the radial gap of the weld.

4. The three-way pipe structure device as described in claim 3, characterized in that, The groove width W1 of the positioning groove is calculated using the following formula (3): W1=2.5δ1+t1 (3) In equation (3), δ1 is the wall thickness of the main pipe; The width W2 of the positioning protrusion is calculated using the following formula (4): W2=2.5δ1 (4) In equation (4), δ1 is the wall thickness of the main pipe.

5. The three-way pipe structure device as described in claim 3, characterized in that, The height h of the positioning protrusion is equal to the wall thickness δ1 of the main pipe.

6. The three-way pipe structure device as described in claim 2, characterized in that, The two positioning grooves are disposed opposite each other on both sides of the connecting port, and the two positioning protrusions are disposed on both sides of the connecting end of the pipe, with each positioning groove corresponding to a positioning protrusion.

7. The three-way pipe structure device as described in claim 1, characterized in that, The main pipe and piping are made of austenitic stainless steel.

8. The three-way pipe structure device as described in claim 1, characterized in that, The wall thickness δ2 of the piping and the wall thickness δ1 of the main pipe are both less than or equal to 5 mm, and the wall thickness δ2 of the piping is less than or equal to the wall thickness δ1 of the main pipe.

9. The three-way pipe structure device as described in claim 2 or 4, characterized in that, The value of t1 is 0.15±0.5mm.

10. The three-way pipe structure device as described in claim 3, characterized in that, The value of t2 is 0.1 ± 0.02 mm.

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