Backflow prevention connector

Abstract

The utility model discloses an anti-backflow joint, which comprises a shunting pipeline and a top cover, the top end of the shunting pipeline is provided with a checking hole, and the outer side of the upper part of the top end of the shunting pipeline is provided with an external thread. The top cover is arranged at the top end of the diversion pipeline, a circular groove is formed in the bottom face of the top cover, and the top end of the diversion pipeline is arranged in the circular groove. An internal thread is arranged on the inner side of the circular groove, and the internal thread is matched with the external thread. A main connecting pipe is arranged on one side of the flow dividing pipeline, and a pair of branch connecting pipes is arranged on one side of the flow dividing pipeline. One side of the main connecting pipe and one side of the branch connecting pipe are provided with inserting grooves, springs and annular push plates are arranged in the inserting grooves, and the two ends of the springs are connected to the inserting grooves and the annular push plates respectively. Through the arrangement of the external thread, the top cover, the circular groove and the internal thread, the top cover is rotated to enable the internal thread to rotate on the external thread, so that the top cover can be disassembled, and the purpose of quickly disassembling the top cover can be achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of connectors, in particular to a connector for preventing backflow. Background Art

[0002] A tee is a pipe fitting that connects a main pipe to branch pipes in different directions, which can divert the liquid in the main pipe to different directions. It is commonly seen in daily life and most of them are made of polyethylene or metal materials. According to the different directions of the branch pipes and the different liquid flow directions, tees of different specifications and shapes can be produced.

[0003] The Chinese authorized utility model patent (Publication No.: CN211175838U) discloses a backflow prevention type tee joint, including a flow splitting pipe. The outer walls of the flow splitting pipe are respectively provided with a first connection end, a second connection end and a third connection end, and the first connection end, the second connection end and the third connection end are evenly arranged outside the flow splitting pipe. The inlet end of the first connection end is connected to a main pipe, the outlet end of the second connection end is connected to a first branch pipe, and the outlet end of the third connection end is connected to a second branch pipe. In the utility model, the main pipe, the first branch pipe and the second branch pipe can be detached from the flow splitting pipe, so that it is convenient to clean the inside of the flow splitting pipe, the main pipe, the first branch pipe and the second branch pipe, preventing excessive accumulation of dirt and impurities in the tee from affecting its flow rate and avoiding the phenomena of tee rupture and water seepage.

[0004] The sealing cover described in the above patent is fixed on the flow splitting pipe by bolts. When disassembling, the bolts need to be completely removed before the sealing cover can be disassembled, making the disassembly process more cumbersome and affecting the disassembly speed. Utility Model Content

[0005] The purpose of the utility model is to solve the deficiencies existing in the prior art and to propose a connector for preventing backflow.

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

[0007] A connector for preventing backflow includes a flow splitting pipe and a top cover. An inspection hole is opened at the top end of the flow splitting pipe, and an external thread is provided on the outer side of the upper part of the top end of the flow splitting pipe.

[0008] The top cover is arranged at the top end of the flow splitting pipe. A circular groove is opened at the bottom surface of the top cover, and the top end of the flow splitting pipe is arranged in the circular groove.

[0009] An internal thread is provided inside the circular groove, and the internal thread cooperates with the external thread.

[0010] One side of the shunt pipeline is provided with a main connecting pipe, and a pair of branch connecting pipes are provided on one side of the shunt pipeline.

[0011] On one side of the main connecting pipe and the branch connecting pipes, there are slots, and inside the slots, there are springs and annular push plates. The two ends of the springs are respectively connected to the slots and the annular push plates.

[0012] Preferably, anti - reflux mechanisms are provided on the inner sides of the main connecting pipe and the branch connecting pipes.

[0013] Preferably, the anti - reflux mechanism includes a retaining ring, a mounting block, a connecting column, and a blocking plate.

[0014] Preferably, the top cover is of a hexagonal structure.

[0015] Preferably, a sealing plug is provided on the inner top surface of the circular groove.

[0016] Preferably, the sealing plug is arranged inside the inspection hole.

[0017] The utility model has the following beneficial effects:

[0018] 1. By setting the external thread, the top cover, the circular groove, and the internal thread, rotating the top cover makes the internal thread rotate on the external thread, and thus the top cover can be disassembled, so as to achieve the purpose of quickly disassembling the top cover.

[0019] 2. By setting the slot, the spring, and the annular push plate, inserting the water pipe into the slot, after long - term use, if the sealing ring is deformed or worn, the annular push plate is always in close contact with the sealing ring under the action of the spring force, with good sealing effect, and it can maintain good sealing even after long - term use, and the service life of the device is long. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic diagram of the overall structure;

[0021] Figure 2 is a schematic diagram of the shunt pipeline structure;

[0022] Figure 3 is a schematic diagram of the sectional structure;

[0023] Figure 4 is a schematic diagram of the slot structure;

[0024] Figure 5 is a schematic diagram of the top cover structure.

[0025] In the figure: 1. Shunt pipeline; 101. Inspection hole; 102. External thread; 2. Main connecting pipe; 3. Branch connecting pipe; 4. Slot; 5. Spring; 6. Annular push plate; 7. Anti - reflux mechanism; 8. Top cover; 801. Circular groove; 802. Internal thread; 803. Sealing plug. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments.

[0027] Refer to Figures 1-4 , a backflow prevention joint, including a shunt pipe 1 and a top cover 8. An inspection hole 101 is opened at the top end of the shunt pipe 1, and an external thread 102 is provided on the outer side of the upper part of the top end of the shunt pipe 1.

[0028] The top cover 8 is arranged at the top end of the shunt pipe 1. The top cover 8 is of a hexagonal structure. A circular groove 801 is opened at the bottom surface of the top cover 8, and the top end of the shunt pipe 1 is arranged in the circular groove 801.

[0029] A sealing plug 803 is provided on the inner top surface of the circular groove 801. The sealing plug 803 is arranged inside the inspection hole 101. By providing the sealing plug 803, the sealing performance between the top cover 8 and the shunt pipe 1 can be increased.

[0030] Internal threads 802 are provided on the inner side of the circular groove 801, and the internal threads 802 cooperate with the external threads 102.

[0031] By rotating the top cover 8, the internal threads 802 rotate on the external threads 102, so as to disassemble the top cover 8, thereby achieving the purpose of quickly disassembling the top cover 8.

[0032] A main connection pipe 2 is provided on one side of the shunt pipe 1, and a pair of sub-connection pipes 3 are provided on one side of the shunt pipe 1.

[0033] Slots 4 are opened on one side of the main connection pipe 2 and the sub-connection pipes 3. Springs 5 and annular push plates 6 are arranged inside the slots 4. The two ends of the springs 5 are respectively connected to the slots 4 and the annular push plates 6.

[0034] Insert the water pipe into the slot 4. There is a sealing ring between the water pipe and the annular push plate 6. After long-term use, the sealing ring is deformed or worn. Under the action of the elastic force of the spring 5, the annular push plate 6 is always in close contact with the sealing ring, and the sealing effect is good. Even after long-term use, good sealing performance can be maintained, and the service life of the device is long.

[0035] Preferably, a backflow prevention mechanism 7 is provided on the inner side of the main connection pipe 2 and the sub-connection pipes 3.

[0036] The anti-backflow mechanism 7 includes a retaining ring and a mounting block. The retaining ring is arranged inside the main connecting pipe 2 and the sub-connecting pipe 3. The mounting block is arranged on the upper side inside the main connecting pipe 2 and the sub-connecting pipe 3. Connecting columns are provided on both sides of the mounting block, and a blocking plate is fitted on the connecting columns. The retaining ring inside the main connecting pipe 2 is located on the side away from the shunt pipe 1, and the retaining ring inside the sub-connecting pipe 3 is located on the side close to the shunt pipe 1. Water impacts the blocking plate through the main connecting pipe 2 to open it, enters the shunt pipe 1 and then is shunted into the sub-connecting pipe 3 to impact the blocking plate to open it, so that water can flow through. When backflow occurs, the blocking plate closes under its own gravity, and the retaining ring blocks it to prevent the backflow water from opening the blocking plate, thus achieving the effect of preventing backflow.

[0037] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A backflow prevention joint, comprising a shunt pipe (1) and a top cover (8), characterized in that: The top end of the diversion pipe (1) is provided with an inspection hole (101), and the outer side of the upper part of the top end of the diversion pipe (1) is provided with an external thread (102); The top cover (8) is arranged at the top end of the shunt pipe (1), a circular groove (801) is provided on the bottom surface of the top cover (8), and the top end of the shunt pipe (1) is arranged in the circular groove (801); An internal thread (802) is provided on the inner side of the circular groove (801), and the internal thread (802) and the external thread (102) cooperate with each other; A main connecting pipe (2) is provided on one side of the diversion pipe (1), and a pair of diversion connecting pipes (3) are provided on one side of the diversion pipe (1); A slot (4) is provided on one side of the main connecting pipe (2) and the branch connecting pipe (3), a spring (5) and an annular push plate (6) are provided inside the slot (4), and two ends of the spring (5) are respectively connected to the slot (4) and the annular push plate (6).

2. The anti-backflow joint according to claim 1, characterized in that: The main connecting pipe (2) and the branch connecting pipe (3) are provided with a backflow prevention mechanism (7) inside.

3. The anti-backflow joint according to claim 2, characterized in that: The backflow prevention mechanism (7) comprises a baffle ring, a mounting block, a connecting column and a baffle plate.

4. The anti-backflow joint according to claim 1, characterized in that: The top cover (8) is a hexagonal structure.

5. The anti-backflow joint according to claim 1, characterized in that: A sealing plug (803) is provided on the inner top surface of the circular groove (801).

6. The anti-backflow joint according to claim 5, characterized in that: The sealing plug (803) is arranged inside the inspection hole (101).

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