External-tooth three-way pipe fitting

Abstract

The utility model belongs to the technical field of three-way pipe fittings, and relates to an external tooth three-way pipe fitting. The utility model discloses a plastic casing, the upper end of plastic casing is provided with the metal joint, the metal joint is provided with the external thread, the lower end of plastic casing is fixedly connected with the branch pipe, the lower sealing piece is arranged between plastic casing and the metal joint, the lower sealing piece is located below the external thread, and the metal joint is provided with the external thread. And a connecting alignment anti-deviation pressing assembly capable of performing reciprocating rectilinear motion along the vertical direction is arranged in the plastic shell. According to the utility model, the connection alignment anti-deviation pressing assembly is arranged, so that the positioning and anti-deviation effects are achieved in the connection process, the connection accuracy is ensured, the sealing performance between threads is improved, and the condition of tooth dislocation is avoided.

Description

Technical Field

[0001] This utility model belongs to the technical field of tee fittings and relates to an external thread tee fitting. Background Technology

[0002] In various liquid or gas transportation systems, tee fittings are commonly used components for branching connections in pipelines. Existing external thread tee fittings have certain shortcomings in terms of connection stability, sealing performance, and ease of installation. For example, traditional tee fittings are prone to leaks due to incomplete sealing when connected to other pipelines, and the installation process is relatively complex, requiring numerous auxiliary tools and operational steps, thus affecting construction efficiency. Furthermore, ensuring accurate alignment between fittings during connection is difficult, easily leading to connection deviations and further affecting the normal operation of the system. Therefore, there is an urgent need to design an external thread tee fitting that can overcome these shortcomings.

[0003] To overcome the shortcomings of existing technologies, people have continuously explored and proposed various solutions. For example, a Chinese patent discloses a durable external thread tee connector [application number: 201922342654.3]. The main pipe is connected and communicates with the middle of the side of the connector pipe; the outer surfaces of both ends of the connector pipe are provided with external thread areas; a connecting area is provided on one side of the external thread area; a connecting ring is sleeved on the outside of the connecting area; a retaining ring is provided at the junction of the connecting area and the external thread area; a raised edge is provided at one end of the connecting ring outside the connecting area; a rubber gasket is provided between the raised edge and the retaining ring in the connecting area; an O-ring is provided on the other side of the retaining ring on the external thread area; an internal thread area is provided on the inner side of the connecting ring; a rubber interlayer a is provided inside the main pipe wall; reinforcing ribs a are evenly distributed inside the rubber interlayer a; a rubber interlayer b is provided inside the connector pipe wall; reinforcing ribs b are evenly distributed inside the rubber interlayer b. However, during installation, when the external thread is connected to the pipe, this solution is prone to misalignment, resulting in poor sealing and poor alignment accuracy. Summary of the Invention

[0004] The purpose of this utility model is to address the above-mentioned problems by providing an external thread tee fitting.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A threaded tee fitting includes a plastic housing, a metal connector at the upper end of the plastic housing with external threads, a branch pipe fixedly connected to the lower end of the plastic housing, a lower seal between the plastic housing and the metal connector, the lower seal being located below the external threads, a connection alignment and anti-deviation pressing assembly that can reciprocate linearly in the vertical direction within the plastic housing, the connection alignment and anti-deviation pressing assembly corresponding to the lower seal, the lower end of the connection alignment and anti-deviation pressing assembly extending into the plastic housing, an elastic element connected to the lower end of the connection alignment and anti-deviation pressing assembly within the plastic housing, and a locking element on the branch pipe that can reciprocate linearly towards or away from the plastic housing, locking the connection alignment and anti-deviation pressing assembly when it moves to its limit position.

[0007] In the aforementioned external thread tee fitting, the connection alignment and anti-deviation pressing assembly includes two slide rods disposed within a plastic housing. The lower ends of the slide rods extend into the plastic housing and are connected to an elastic element. An alignment and anti-deviation plate is provided at the top of the slide rods, and an upper sealing element is provided at the bottom of the alignment and anti-deviation plate. The positions of the upper sealing element and the lower sealing element correspond to each other.

[0008] In the aforementioned external thread tee fitting, the upper sealing element includes an upper sealing half-ring disposed at the bottom of the alignment anti-deviation plate, and the shape of the upper sealing half-ring is adapted to that of the lower sealing element.

[0009] In the aforementioned external thread tee fitting, the lower sealing element includes a lower sealing ring disposed below the external thread, the upper sealing half ring is provided with a first alignment step, and the lower sealing ring is provided with a second alignment step. The first alignment step and the second alignment step are positioned correspondingly and matched in shape.

[0010] In the aforementioned external thread tee fitting, the elastic element includes a spring disposed within a plastic housing, and the spring is connected to the lower end of a slide rod.

[0011] In the aforementioned external thread tee fitting, a locking connector is provided on the outer side of the slide rod. When the slide rod moves down to its limit position, the locking connector engages with the locking connector.

[0012] In the aforementioned external thread tee fitting, the locking connector includes a side slide plate disposed on the outside of the slide rod, the side slide plate having a locking hole on its outside, and the side slide plate slidingly engaging with the plastic housing.

[0013] In the aforementioned external thread tee fitting, the locking element includes a locking rod disposed on the branch pipe. When the sliding rod moves down to its limit position, the locking rod engages with the locking hole.

[0014] In the aforementioned external thread tee fitting, the locking rod is provided with a connecting seat, and the bottom of the connecting seat is provided with a limiting slide plate extending into the plastic housing, the limiting slide plate slidingly engaging with the plastic housing.

[0015] In the aforementioned external thread tee fitting, a threaded hole is provided inside the limiting slide plate.

[0016] Compared with existing technologies, the advantages of this utility model are:

[0017] 1. This utility model, by setting a connection alignment and anti-deviation pressing component, plays a positioning and anti-deviation role during the connection process, ensuring accurate connection, improving the sealing between threads, and avoiding misalignment.

[0018] 2. This utility model, through its uniquely designed upper and lower sealing components, especially the cooperation between the first and second alignment steps, greatly improves the sealing performance compared to traditional simple sealing methods.

[0019] 3. This utility model uses a locking mechanism between the locking component and the connecting alignment and anti-biasing pressure assembly, which is simple and convenient to operate, requires no complicated installation tools and steps, and improves installation efficiency.

[0020] Other advantages, objectives and features of this invention will be partly apparent from the following description, and partly understood by those skilled in the art through study and practice of this invention. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of this utility model.

[0022] Figure 2 This is a cross-sectional schematic diagram of the locking component.

[0023] In the diagram: 1. Plastic housing; 2. Metal connector; 3. Branch pipe; 4. Lower seal; 5. Connecting alignment and anti-deviation pressing assembly; 6. Elastic element; 7. Locking element; 8. Slide rod; 9. Alignment and anti-deviation plate; 10. Upper seal; 11. Upper sealing half ring; 12. Lower sealing ring; 13. First alignment step; 14. Second alignment step; 15. Spring; 16. Locking connector; 17. Side slide plate; 18. Locking hole; 19. Locking rod; 20. Connecting seat; 21. Limiting slide plate; 22. Screw hole. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings.

[0025] like Figure 1 , Figure 2As shown, an external thread tee fitting includes a plastic housing 1, a metal connector 2 at the upper end of the plastic housing 1 with external threads, a branch pipe 3 fixedly connected to the lower end of the plastic housing 1, a lower sealing element 4 between the plastic housing 1 and the metal connector 2, the lower sealing element 4 being located below the external threads, a connection alignment and anti-deviation pressing assembly 5 that can reciprocate linearly in the vertical direction is provided inside the plastic housing 1, the connection alignment and anti-deviation pressing assembly 5 being positioned corresponding to the lower sealing element 4, the lower end of the connection alignment and anti-deviation pressing assembly 5 extending into the plastic housing 1, an elastic element 6 connected to the lower end of the connection alignment and anti-deviation pressing assembly 5 being provided inside the plastic housing 1, and a locking element 7 that can reciprocate linearly towards or away from one end of the plastic housing 1 being provided on the branch pipe 3, the locking element 7 locking with the connection alignment and anti-deviation pressing assembly 5 when the connection alignment and anti-deviation pressing assembly 5 moves down to its limit position.

[0026] In this embodiment, during installation, the pipe to be connected is screwed onto the external thread of the metal connector 2. As the pipe is screwed in, the connection alignment and anti-deviation pressing component 5 is pushed downward, compressing the elastic element 6. When the connection alignment and anti-deviation pressing component 5 moves to its limit position, the locking element 7 is operated to bring it close to the plastic housing 1 and lock it with the connection alignment and anti-deviation pressing component 5, completing the pipe connection. The external thread of the metal connector 2 is convenient to connect with other pipes and has strong versatility. The lower sealing element 4 can initially prevent leakage at the connection. The connection alignment and anti-deviation pressing component 5 plays a positioning and anti-deviation role during the connection process, ensuring accurate connection, improving the sealing between threads, and avoiding misalignment. The elastic element 6 provides a restoring force for the connection alignment and anti-deviation pressing component 5, facilitating installation and adjustment. After the locking element 7 locks with the connection alignment and anti-deviation pressing component 5, it enhances the stability of the pipe connection and prevents loosening.

[0027] Combination Figure 1 , Figure 2 As shown, the connection alignment and anti-deviation pressing assembly 5 includes two slide rods 8 disposed in the plastic housing 1. The lower end of the slide rod 8 extends into the plastic housing 1 and is connected to the elastic element 6. The top of the slide rod 8 is provided with an alignment and anti-deviation plate 9, and the bottom of the alignment and anti-deviation plate 9 is provided with an upper sealing element 10. The upper sealing element 10 and the lower sealing element 4 are positioned corresponding to each other.

[0028] Specifically, when the pipe to be connected pushes the alignment and anti-deviation pressing assembly 5 downward, the slide rod 8 slides downward within the plastic housing 1, causing the alignment and anti-deviation plate 9 to move downward, while simultaneously compressing the elastic element 6. The upper sealing element 10 moves downward with the alignment and anti-deviation plate 9 and comes into contact with the lower sealing element 4. The two slide rods 8 ensure the stability and straightness of the vertical movement of the alignment and anti-deviation pressing assembly 5. The alignment and anti-deviation plate 9 contacts the pipe during connection, playing a role in precise alignment and preventing deviation. The upper sealing element 10 cooperates with the lower sealing element 4 to further improve the sealing effect.

[0029] Combination Figure 1 , Figure 2 As shown, the upper sealing member 10 includes an upper sealing half ring 11 disposed at the bottom of the alignment anti-deviation plate 9, and the upper sealing half ring 11 is adapted to the shape of the lower sealing member 4.

[0030] In this embodiment, when the upper sealing half ring 11 moves down with the alignment anti-deviation plate 9 to contact the lower sealing element 4, the two can fit tightly together due to their matching shapes, forming a sealing structure. The matching shapes make the seal between the upper sealing half ring 11 and the lower sealing element 4 tighter, effectively preventing liquid or gas leakage and improving the sealing performance of the pipe fitting.

[0031] The lower sealing element 4 includes a lower sealing ring 12 disposed below the external thread, a first alignment step 13 provided on the upper sealing half ring 11, and a second alignment step 14 provided on the lower sealing ring 12. The first alignment step 13 and the second alignment step 14 are positioned correspondingly and matched in shape.

[0032] In this embodiment, during the contact process of the upper and lower seals, the first alignment step 13 and the second alignment step 14 are aligned and cooperate with each other, further ensuring the accurate docking and tight fit of the upper and lower seals. The cooperation of the step structure not only enhances the sealing effect, but also plays a positioning role during installation, making it easier for the upper and lower seals to be accurately docked, thus improving the accuracy and efficiency of installation.

[0033] Combination Figure 2 As shown, the elastic element 6 includes a spring 15 disposed inside the plastic housing 1, and the spring 15 is connected to the lower end of the slide rod 8.

[0034] In this embodiment, when the slide bar 8 moves downward, the spring 15 is compressed and stores elastic potential energy; when the connection is completed, the external force is removed, the spring 15 releases the elastic potential energy, pushes the slide bar 8 to reset upward, and the spring 15 provides a stable elastic force, which facilitates the reset of the connection alignment anti-biasing pressure component 5, provides convenience for installation and adjustment, and ensures the stability of the force during the connection process.

[0035] The slide bar 8 is provided with a locking connector 16 on its outer side. When the slide bar 8 moves down to its limit position, the locking member 7 and the locking connector 16 engage with each other.

[0036] In this embodiment, when the slide bar 8 moves down to the limit position, the locking member 7 moves to correspond to the position of the locking connector 16, and then the two engage with each other to achieve locking. This engagement method is simple and reliable, and can quickly and effectively lock the connection alignment and anti-deviation pressure component 5, enhance the firmness of the pipe connection, prevent the connection from loosening, and avoid the upward elastic force after connection from affecting the connection sealing.

[0037] The locking connector 16 includes a side slide plate 17 disposed on the outside of the slide bar 8. A locking hole 18 is provided on the outside of the side slide plate 17, and the side slide plate 17 is slidably engaged with the plastic housing 1.

[0038] In this embodiment, when the slide bar 8 moves up and down, the side slide plate 17 slides synchronously inside the plastic housing 1. When the slide bar 8 moves down to the limit position, the locking hole 18 corresponds to the position of the locking member 7, which facilitates the two to engage. The sliding cooperation of the side slide plate 17 ensures the smooth movement of the locking connector 16. The locking hole 18 provides an accurate docking structure for engaging with the locking member 7, making the locking operation easier to achieve.

[0039] Combination Figure 2 As shown, the locking member 7 includes a locking rod 19 disposed on the branch pipe 3. When the slide rod 8 moves down to the limit position, the locking rod 19 engages with the locking hole 18.

[0040] In this embodiment, after the slide bar 8 moves down to its position, the locking bar 19 is pushed to insert into the locking hole 18, thus completing the snap-fit ​​locking. The snap-fit ​​between the locking bar 19 and the locking hole 18 directly achieves the locking of the pipe connection. The structure is simple, the operation is convenient, and the stability of the connection is effectively improved.

[0041] Combination Figure 1 , Figure 2 As shown, the locking rod 19 is provided with a connecting seat 20, and the bottom of the connecting seat 20 is provided with a limiting slide plate 21 that extends into the plastic housing 1. The limiting slide plate 21 is slidably engaged with the plastic housing 1.

[0042] In this embodiment, when the locking rod 19 is pushed, the connecting seat 20 drives the limiting slide plate 21 to slide inside the plastic housing 1. The limiting slide plate 21 plays a guiding and limiting role, ensuring the straightness and accuracy of the movement of the locking rod 19. The setting of the limiting slide plate 21 makes the movement of the locking rod 19 more stable and accurate, avoids deviation during the locking process, and ensures the locking effect.

[0043] Combination Figure 2 As shown, the limiting slide plate 21 has a screw hole 22 inside.

[0044] In this embodiment, after the limiting slide plate 21 moves to the required position, it is connected by screws and screw holes 22 to further fix the position of the limiting slide plate 21.

[0045] The working principle of this utility model is as follows:

[0046] During installation, the pipe to be connected is initially connected to the external thread of the metal connector 2. During the connection process, the slide rod 8 is in its initial position under the action of the spring 15, that is, the slide rod 8 is in a higher position, and the alignment and anti-deviation plate 9 is located inside the plastic housing 1 at the top.

[0047] When the pipe is connected to the metal joint 2, the pipe is pushed downwards, causing it to contact the alignment anti-deviation plate 9 and move downwards. The slide rod 8 moves downwards along with the alignment anti-deviation plate 9, compressing the spring 15. As the slide rod 8 moves downwards, the upper sealing half-ring 11 gradually approaches the lower sealing ring 12. When the slide rod 8 moves to a certain position, the first alignment step 13 on the upper sealing half-ring 11 and the second alignment step 14 on the lower sealing ring 12 are accurately aligned and cooperate, forming a tight sealing structure.

[0048] Continue pushing the pipe until the slide bar 8 moves down to its limit position. At this time, the locking hole 18 on the side slide plate 17 on the outside of the slide bar 8 and the locking rod 19 on the branch pipe 3 are at the same horizontal position. Move the locking member 7 so that the locking rod 19 is inserted into the locking hole 18, thereby locking the locking member 7 with the connection alignment anti-biasing and downward pressure assembly 5, thus completing the connection of the entire pipe fitting.

[0049] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, without departing from the spirit of this utility model.

[0050] Although this document frequently uses terms such as plastic housing 1, metal connector 2, branch pipe 3, lower seal 4, connecting alignment and anti-deviation pressing assembly 5, elastic element 6, locking element 7, slide rod 8, alignment and anti-deviation plate 9, upper seal 10, upper sealing half ring 11, lower sealing ring 12, first alignment step 13, second alignment step 14, spring 15, locking connector 16, side slide plate 17, locking hole 18, locking rod 19, connecting seat 20, limiting slide plate 21, and screw hole 22, the possibility of using other terms is not excluded. The use of these terms is merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

Claims

1. A threaded tee fitting, comprising a plastic housing (1), wherein a metal connector (2) is provided at the upper end of the plastic housing (1), the metal connector (2) having external threads, and a branch pipe (3) is fixedly connected to the lower end of the plastic housing (1), characterized in that, A lower seal (4) is provided between the plastic housing (1) and the metal connector (2). The lower seal (4) is located below the external thread. A connection alignment and anti-deviation pressing assembly (5) is provided inside the plastic housing (1) and can reciprocate linearly in the vertical direction. The connection alignment and anti-deviation pressing assembly (5) is positioned corresponding to the lower seal (4). The lower end of the connection alignment and anti-deviation pressing assembly (5) extends into the plastic housing (1). An elastic element (6) is provided inside the plastic housing (1) and connected to the lower end of the connection alignment and anti-deviation pressing assembly (5). A locking element (7) is provided on the branch pipe (3) and can reciprocate linearly along one end close to or away from the plastic housing (1). When the connection alignment and anti-deviation pressing assembly (5) moves down to the limit position, the locking element (7) locks with the connection alignment and anti-deviation pressing assembly (5).

2. The external threaded tee fitting according to claim 1, characterized in that, The connection alignment and anti-deviation pressing assembly (5) includes two slide rods (8) disposed in the plastic housing (1). The lower end of the slide rod (8) extends into the plastic housing (1) and is connected to the elastic element (6). The top of the slide rod (8) is provided with an alignment and anti-deviation plate (9). The bottom of the alignment and anti-deviation plate (9) is provided with an upper sealing element (10). The upper sealing element (10) and the lower sealing element (4) are positioned corresponding to each other.

3. A threaded tee fitting according to claim 2, characterized in that, The upper sealing element (10) includes an upper sealing half ring (11) disposed at the bottom of the alignment anti-deviation plate (9), and the upper sealing half ring (11) is adapted to the shape of the lower sealing element (4).

4. A threaded tee fitting according to claim 3, characterized in that, The lower sealing element (4) includes a lower sealing ring (12) disposed below the external thread, the upper sealing half ring (11) is provided with a first alignment step (13), and the lower sealing ring (12) is provided with a second alignment step (14). The positions of the first alignment step (13) and the second alignment step (14) are corresponding and their shapes are matched.

5. A threaded tee fitting according to claim 4, characterized in that, The elastic element (6) includes a spring (15) disposed in the plastic housing (1), and the spring (15) is connected to the lower end of the slide rod (8).

6. A threaded tee fitting according to claim 5, characterized in that, The slide bar (8) is provided with a locking connector (16) on the outside. When the slide bar (8) moves down to the limit position, the locking member (7) and the locking connector (16) engage with each other.

7. A threaded tee fitting according to claim 6, characterized in that, The locking connector (16) includes a side slide plate (17) disposed on the outside of the slide bar (8), and a locking hole (18) is provided on the outside of the side slide plate (17). The side slide plate (17) is slidably engaged with the plastic housing (1).

8. A threaded tee fitting according to claim 7, characterized in that, The locking member (7) includes a locking rod (19) disposed on the branch pipe (3). When the slide rod (8) moves down to the limit position, the locking rod (19) engages with the locking hole (18).

9. A threaded tee fitting according to claim 8, characterized in that, The locking rod (19) is provided with a connecting seat (20), and the bottom of the connecting seat (20) is provided with a limiting slide plate (21) extending into the plastic shell (1), and the limiting slide plate (21) slides in cooperation with the plastic shell (1).

10. A threaded tee fitting according to claim 9, characterized in that, The limiting slide plate (21) has a screw hole (22) inside.

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