Marine low-pressure large-flow quick connector and manufacturing method thereof

Abstract

The invention discloses a marine low-pressure large-flow quick connector and a manufacturing method thereof, and belongs to the technical field of quick connectors, the marine low-pressure large-flow quick connector comprises a first connecting pipe and a second connecting pipe, a first sealing mechanism is arranged in the first connecting pipe and can seal the first connecting pipe, and a second sealing mechanism is arranged in the second connecting pipe and can seal the second connecting pipe; a second sealing mechanism is arranged in the second connecting pipe, the second sealing mechanism can seal the second connecting pipe, the outer diameter of the first connecting pipe is equal to the inner diameter of the second connecting pipe, and the first connecting pipe is embedded in the second connecting pipe. Through the arrangement of the sealing mechanism, when the connectors at the two ends are not connected, liquid in the marine pipelines can be blocked, when the connectors are connected, the marine pipelines at the two ends can communicate with each other, meanwhile, through the arrangement of the clamping ball, the first connecting pipe and the second connecting pipe can be rapidly connected, and the connecting efficiency is improved. And meanwhile, the first connecting pipe and the second connecting pipe which are in a connected state are not easily separated.

Description

Technical Field

[0001] The invention belongs to the technical field of quick connectors, and in particular relates to a marine low-pressure and high-flow quick connector and a manufacturing method thereof. Background Art

[0002] A quick connector is a device that can quickly connect and disconnect pipes without the use of tools. It is widely used in various industrial fields, such as petrochemical, machinery manufacturing, shipbuilding, food processing, medical equipment and other industries. The design of the quick connector enables fluids or gases to be quickly and safely connected and separated without the use of tools, greatly improving work efficiency and reducing downtime;

[0003] Marine low-pressure, high-flow quick connectors are quick-connect devices designed specifically for marine applications. They are used to quickly and safely connect and disconnect fluid delivery lines. This type of quick connector is usually used in situations where a large amount of fluid is required, such as cooling water systems, fuel delivery systems, compressed air systems, etc.

[0004] During the connection process of the existing pipe joints, the pipe itself is firstly in a disconnected state. During the installation of the joints, since the pipe itself cannot be sealed, the liquid inside the pipe will continue to flow, which will affect the installation of the joints and cause waste of liquid. Summary of the invention

[0005] The technical problem to be solved by the present invention is to overcome the disadvantages of the above-mentioned prior art and provide a marine low-pressure and high-flow quick connector and a manufacturing method thereof.

[0006] The technical solution adopted to solve the above technical problems is: a marine low-pressure, high-flow quick connector and a manufacturing method thereof, comprising a first connecting pipe and a second connecting pipe, a first sealing mechanism is arranged inside the first connecting pipe, the first sealing mechanism can seal the first connecting pipe, a second sealing mechanism is arranged inside the second connecting pipe, the second sealing mechanism can seal the second connecting pipe, the outer diameter of the first connecting pipe is equal to the inner diameter of the second connecting pipe, and the first connecting pipe is nested inside the second connecting pipe.

[0007] Through the above technical solution, the first connecting pipe and the second connecting pipe are respectively connected to the two ends of the ship pipeline, and the ship pipelines at both ends are blocked, so that when the first connecting pipe and the second connecting pipe are not connected to each other, the liquid inside the ship pipeline will not leak easily. If the ship pipeline wants to be connected, it needs to be connected through the first connecting pipe and the second connecting pipe, and the first connecting pipe is nested inside the second connecting pipe, so that the first connecting pipe and the second connecting pipe will not be easily separated.

[0008] Furthermore, a telescopic tube is sleeved on the outside of the second connecting tube, a telescopic spring is provided between the telescopic tube and the second connecting tube, and the telescopic tube and the second connecting tube are connected via the telescopic spring.

[0009] Through the above technical solution, the telescopic tube can move back and forth outside the second connecting tube to facilitate connection with the first connecting tube, and the telescopic tube and the second connecting tube are connected by a telescopic spring, so that the telescopic tube can only be opened when pulled. If the telescopic tube is released, the telescopic tube will be reset due to the self-resetting function of the telescopic spring.

[0010] Furthermore, a ball groove is provided inside the second connecting tube at one end close to the telescopic tube. The ball groove is arranged circumferentially inside the second telescopic tube. A locking ball is arranged inside the ball groove. The locking ball slides inside the ball groove.

[0011] Through the above technical solution, the card ball can be pushed by the first connecting tube from the inside, and can also be pushed by the telescopic tube from the outside. When the first connecting tube pushes the card ball from the inside, the card ball will move outward inside the ball groove, thereby facilitating the entry and connection of the first connecting tube. When the telescopic tube pushes the card ball from the outside, the card ball will move inside the ball groove toward the direction of the first connecting tube until it enters the card groove, thereby achieving connection and engagement.

[0012] Furthermore, the first connecting tube and the second connecting tube are both engraved with connecting threads at ends away from each other, the first connecting tube is provided with a first plate groove, and the second connecting tube is provided with a second plate groove.

[0013] Through the above technical solution, the first connecting pipe and the second connecting pipe can be connected to the marine pipeline through the connecting thread, which greatly reduces the installation time of the first connecting pipe and the second connecting pipe, thereby improving the installation efficiency to achieve a quick effect.

[0014] Furthermore, the first sealing mechanism includes a first telescopic rod arranged inside the first connecting tube, the first telescopic rod is fixedly connected to a first block at one end close to the second connecting tube, the first telescopic rod is fixedly connected to a first baffle at one end away from the first block, a first return spring is arranged between the first baffle and the first block, the two ends of the first return spring are respectively fixedly connected to the first baffle and the first block, and the first baffle is located inside the first plate groove.

[0015] Through the above technical solution, the first block can block the outlet of the first connecting pipe. When the first connecting pipe is to be opened, the first block is first pushed toward the first connecting pipe. At the same time, the pressure inside the marine pipeline can push the first baffle and compress the first return spring, and the first telescopic rod shrinks from both ends to the middle. In this way, when the first baffle and the first push block are close to each other, a gap can be formed with the inner wall of the first connecting pipe, thereby achieving the effect of opening the first connecting pipe and facilitating the circulation of liquid inside the marine pipeline.

[0016] Furthermore, the second sealing mechanism includes a second telescopic rod arranged inside the second connecting tube, the second telescopic rod is fixedly connected to a second block at one end close to the second connecting tube, the second telescopic rod is fixedly connected to a second baffle plate at one end away from the second block, a second return spring is arranged between the second baffle plate and the second block, the two ends of the second return spring are respectively fixedly connected to the second baffle plate and the second block, the second baffle plate is located inside the second plate groove, and the first block corresponds to the second block.

[0017] Through the above technical solution, the second block can block the outlet of the second connecting pipe. When the second connecting pipe is to be opened, the second block is first pushed toward the direction of the second connecting pipe. At the same time, the pressure inside the marine pipeline can push the second baffle and compress the second return spring, and the second telescopic rod shrinks from both ends to the middle. In this way, the second baffle and the second push block can form a gap with the inner wall of the second connecting pipe when they are close to each other, thereby achieving the effect of opening the second connecting pipe and facilitating the circulation of liquid inside the marine pipeline.

[0018] Furthermore, a clamping groove is provided on the outside of the first connecting tube, and the clamping groove is in a circular ring shape. The clamping groove surrounds the outside of the first connecting tube, and the clamping ball is located inside the clamping groove.

[0019] Through the above technical solution, when the telescopic tube pushes the card ball toward the first connecting tube, the edge of the card ball will naturally enter the card slot, and the main body of the card ball is still inside the ball slot, so that the card ball will be stuck between the first connecting tube and the second connecting tube, thereby fixing the first connecting tube and the second connecting tube.

[0020] A marine low-pressure, high-flow quick connector and a manufacturing method thereof, comprising the following specific steps:

[0021] Step 1: First, install the first sealing mechanism inside the first connecting pipe, and then connect the first connecting pipe to the marine pipeline through the connecting thread, and at the same time install the second sealing mechanism inside the second connecting pipe, and the second connecting pipe is connected to the other end of the marine pipeline;

[0022] Step 2: When the first connecting pipe and the second connecting pipe are not connected, if water flows at both ends of the marine pipeline, the water pressure will push the baffle to move toward the outlet direction, and the position of the baffle is moved by the telescopic rod, so that the water flows into between the baffle and the baffle, so the baffle is also affected by the pressure of the water flow and moves toward the outlet direction, thereby closing the outlet to ensure that the liquid inside the marine pipeline does not leak;

[0023] Step 3: When it is necessary to connect the first connecting tube and the second connecting tube, first pull the telescopic tube to move in the direction of the second connecting tube, so as to compress the telescopic spring. At this time, the card ball loses the obstruction of the telescopic tube, and then the first connecting tube is inserted into the second connecting tube. At this time, the outer wall of the first connecting tube pushes the card ball, and the card ball moves in the ball groove in the direction away from the first connecting rod, so that the first connecting tube can penetrate into the second connecting tube until the card ball corresponds to the card groove. At this time, release the telescopic tube. Under the self-reset function of the telescopic spring, the telescopic tube is bounced up by the telescopic spring and moves in the direction of the first connecting tube. During the movement, the telescopic tube will push the card ball until the card ball enters the card groove. At this time, the first connecting tube and the second connecting tube can be connected.

[0024] Step 4: When the first connecting pipe and the second connecting pipe are connected, the first stopper and the second stopper abut against each other, and then the liquid flowing inside the marine pipeline will press the baffle through pressure, so that the telescopic rod will shrink and the return spring will be compressed. In this way, the baffle and the stopper are close to each other, leaving a gap between the connecting pipes, allowing the liquid to flow inside the gap.

[0025] The beneficial effects of the present invention are as follows: (1) The present invention, through the setting of the sealing mechanism, can seal and plug the ship pipeline during the process of connecting the connecting pipe with the ship pipeline, thereby avoiding the waste caused by the loss of liquid inside the ship pipeline, greatly saving costs, and facilitating the connection between the two connecting pipes, thereby improving the connection efficiency; (2) The present invention also, through the setting of the telescopic rod and the reset spring, makes it possible for the two connecting pipes to open the sealing mechanism only when they abut against each other, thereby passing through the ship pipeline, and the sealing mechanism will plug the ship pipeline when they are not abutting against each other, thereby avoiding the loss and waste of liquid inside the ship pipeline; (3) Finally, through the setting of the card ball, the present invention can make the first connecting pipe and the second connecting pipe can be quickly connected, and the first connecting pipe and the second connecting pipe will not fall off easily after being connected, thereby ensuring the stability of the joint. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0027] Figure 2It is a quarter cross-sectional view of the overall structure of the present invention;

[0028] Figure 3 It is a cross-sectional view of the overall structure of the present invention;

[0029] Figure 4 It is a cross-sectional view of the structures such as the first connecting pipe and the first sealing mechanism in the present invention;

[0030] Figure 5 It is a cross-sectional view of the structure of the telescopic tube and the like in the present invention;

[0031] Figure 6 is a cross-sectional view of the second connecting pipe and the second sealing mechanism in the present invention;

[0032] Figure 7 It is an exploded view of the overall structure of the present invention.

[0033] Figure numerals: 100, first connecting tube; 101, connecting thread; 102, first plate groove; 103, clamping groove; 200, telescopic tube; 201, telescopic spring; 300, second connecting tube; 301, clamping ball; 302, ball groove; 303, second plate groove; 400, second sealing mechanism; 401, second telescopic rod; 402, second stop block; 403, second return spring; 404, second baffle; 500, first sealing mechanism; 501, first telescopic rod; 502, first stop block; 503, first return spring; 504, first baffle. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0035] like Figure 1 - Figure 7 As shown, a marine low-pressure and high-flow quick connector and a manufacturing method thereof of the present embodiment include a first connecting pipe 100 and a second connecting pipe 300. A first sealing mechanism 500 is arranged inside the first connecting pipe 100, and the first sealing mechanism 500 has the effect of sealing the first connecting pipe 100. A second sealing mechanism 400 is arranged inside the second connecting pipe 300, and the second sealing mechanism 400 has the effect of sealing the second connecting pipe 300. The outer diameter of the first connecting pipe 100 is equal to the inner diameter of the second connecting pipe 300, so that the first connecting pipe 100 can be inserted into the second connecting pipe 300, and there will be no problem of being unable to install due to size. The first connecting pipe 100 is nested in the second connecting pipe 300, so that the first connecting pipe 100 and the second connecting pipe 300 can be connected more tightly.

[0036] like Figure 1 - Figure 3 , Figure 5 As shown, the telescopic tube 200 is placed outside the second connecting tube 300, and a telescopic spring 201 is arranged between the telescopic tube 200 and the second connecting tube 300. The telescopic tube 200 and the second connecting tube 300 are connected by the telescopic spring 201. When the telescopic tube 200 moves outside the second connecting tube 300, it will be opened by compressing the telescopic spring 201 to facilitate connection with the first connecting tube 100. At the same time, after the telescopic tube 200 is released, the telescopic tube 200 will be reset under the self-reset function of the telescopic spring 201.

[0037] like Figure 3 , Figure 6 As shown, a ball groove 302 is opened inside the second connecting tube 300 at one end close to the telescopic tube 200. The ball grooves 302 are arranged in a circle inside the second telescopic tube 200, and each ball groove 302 is independent and not connected to each other. A locking ball 301 is arranged inside the ball groove 302, and the locking ball 301 slides inside the ball groove 302, so that different effects will be achieved when the locking ball 301 is at different positions inside the ball groove 302.

[0038] like Figure 3 , Figure 4 , Figure 6 As shown, the first connecting pipe 100 and the second connecting pipe 300 are both engraved with connecting threads 101 at the ends away from each other. Through the connecting threads 101, the first connecting pipe 100 and the second connecting pipe 300 can be connected to the ship pipeline. A first plate groove 102 is opened inside the first connecting pipe 100, and a second plate groove 303 is opened inside the second connecting pipe 300. The opening of the first plate groove 102 and the second plate groove 303 facilitates the installation and setting of the first baffle 504 and the second baffle 404. The first baffle 504 is located inside the first plate groove 102, and the second baffle 404 is located inside the second plate groove 303. Under normal conditions, the first sealing mechanism 500 and the second sealing mechanism 400 can be fixed by the cooperation of the baffle and the plate groove.

[0039] like Figure 4 As shown, the first sealing mechanism 500 includes a first telescopic rod 501 arranged inside the first connecting tube 100, the first telescopic rod 501 is fixedly connected to a first block 502 at one end close to the second connecting tube 300, the first telescopic rod 501 is fixedly connected to a first baffle 504 at one end away from the first block 502, a first return spring 503 is arranged between the first baffle 504 and the first block 502, the two ends of the first return spring 503 are respectively fixedly connected to the first baffle 504 and the first block 502, and the first baffle 504 is located inside the first plate groove 102.

[0040] like Figure 6As shown, the second sealing mechanism 400 includes a second telescopic rod 401 arranged inside the second connecting tube 300, the second telescopic rod 401 is fixedly connected to a second stopper 402 at one end close to the second connecting tube 300, the second telescopic rod 401 is fixedly connected to a second stopper 404 at one end away from the second stopper 402, a second return spring 403 is arranged between the second baffle 404 and the second stopper 402, the two ends of the second return spring 403 are respectively fixedly connected to the second baffle 404 and the second stopper 402, the second baffle 404 is located inside the second plate groove 303, the first stopper 502 corresponds to the second stopper 402, so that when the first connecting tube 100 and the second connecting tube 300 are connected, the first stopper 502 can abut against the second stopper 402 to be connected.

[0041] like Figure 2 - Figure 4 As shown, a slot 103 is provided on the outside of the first connecting tube 100 . The slot 103 is annular, so that the ball 301 can be easily inserted into the slot 103 . The slot 103 surrounds the outside of the first connecting tube 100 , and the ball 301 is located inside the slot 103 .

[0042] A marine low-pressure, high-flow quick connector and a manufacturing method thereof, comprising the following specific steps:

[0043] Step 1: First, insert the first sealing mechanism 500 into the first connecting pipe 100, and the first baffle 504 is engaged in the first plate groove 102, the first block 502 blocks the outlet of the first connecting pipe 100, and then connect the first connecting pipe 100 to the marine pipeline through the connecting thread 101, and at the same time, insert the second sealing mechanism 400 into the second connecting pipe 300, and the second baffle 404 is engaged in the second plate groove 303, the second block 402 blocks the outlet of the second connecting pipe 300, and the second connecting pipe 300 is connected to another marine pipeline;

[0044] Step 2: When the first connecting pipe 100 and the second connecting pipe 300 are not connected to each other, and one of the two ends of the marine pipeline is definitely a water inlet and the other is a water outlet, and the liquid flows in the direction from the water outlet to the water inlet. Assuming that the water outlet is connected to the first connecting pipe 100, the pressure of the liquid will push the first baffle 504 to move toward the second connecting pipe 300 (water inlet), and move the position of the first baffle 504 through the first telescopic rod 501, so that the water flow enters between the first baffle 502 and the first baffle 504. Therefore, the first baffle 502 is also affected by the pressure of the water flow and moves toward the second connecting pipe 300 (water inlet), thereby closing the outlet of the first connecting pipe 100 to ensure that the liquid inside the marine pipeline will not leak;

[0045] Step 3: When the first connecting tube 100 and the second connecting tube 300 need to be connected, first pull the telescopic tube 200 to move toward the second connecting tube 300, so as to compress the telescopic spring 201. At this time, the card ball 301 loses the blockage of the telescopic tube 200, and then the first connecting tube 100 is inserted into the second connecting tube 300. At this time, the outer wall of the first connecting tube 100 pushes the card ball 301, and the card ball 301 moves in the ball groove 302 away from the first connecting rod, so that the second connecting tube 100 is connected to the second connecting tube 300. The first connecting tube 100 can be extended into the second connecting tube 300 until the locking ball 301 corresponds to the locking groove 103. At this time, the telescopic tube 200 is released. Under the self-reset function of the telescopic spring 201, the telescopic tube 200 is bounced up by the telescopic spring 201 and moves toward the first connecting tube 100. During the movement of the telescopic tube 200, the locking ball 301 is pushed until the locking ball 301 enters the locking groove 103. At this time, the first connecting tube 100 and the second connecting tube 300 can be connected.

[0046] Step 4: When the first connecting pipe 100 and the second connecting pipe 300 are connected, the first stopper 502 and the second stopper 402 abut against each other, and the first telescopic rod 501 and the second telescopic rod 401 are compressed at the same time. Then, because the liquid circulating inside the marine pipeline will suppress the first baffle 504 through pressure, the first telescopic rod 501 is contracted and the first return spring 503 is compressed. In this way, the first baffle 504 and the first stopper 502 are close to each other, and the first sealing mechanism 500 and the second sealing mechanism 400 will leave a gap between the first connecting pipe 100 and the second connecting pipe 300, so that the liquid can circulate inside the gap. Finally, the liquid inside the marine pipeline will flow out from the gap between the second baffle 404 and the second plate groove 303, so that the marine pipelines at both ends can be connected.

[0047] Finally, it should be noted that the first connecting pipe 100 and the second connecting pipe 300 can both be connected to one end of the water inlet, and the internal structures of the first connecting pipe 100 and the second connecting pipe 300 can both seal the pipeline, and their internal structures can also allow the liquid inside the marine pipeline to circulate, so the installation of the first connecting pipe 100 and the second connecting pipe 300 does not affect the use.

[0048] The above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention.

Claims

1. A low-pressure, high-flow quick connector for a ship and a manufacturing method thereof, comprising a first connecting pipe (100) and a second connecting pipe (300), characterized in that: A first sealing mechanism (500) is arranged inside the first connecting tube (100), and the first sealing mechanism (500) can seal the first connecting tube (100); a second sealing mechanism (400) is arranged inside the second connecting tube (300), and the second sealing mechanism (400) can seal the second connecting tube (300); the outer diameter of the first connecting tube (100) is equal to the inner diameter of the second connecting tube (300), and the first connecting tube (100) is nested inside the second connecting tube (300).

2. A marine low-pressure, high-flow quick connector and a manufacturing method thereof according to claim 1, characterized in that: The second connecting tube (300) is sheathed with a telescopic tube (200), a telescopic spring (201) is provided between the telescopic tube (200) and the second connecting tube (300), and the telescopic tube (200) and the second connecting tube (300) are connected via the telescopic spring (201).

3. A marine low-pressure, high-flow quick connector and a manufacturing method thereof according to claim 1, characterized in that: A ball groove (302) is provided inside the second connecting tube (300) at one end close to the telescopic tube (200). The ball groove (302) is arranged in a circumferential manner inside the second telescopic tube (200). A locking ball (301) is arranged inside each of the ball grooves (302). The locking ball (301) slides inside the ball groove (302).

4. A marine low-pressure, high-flow quick connector and a manufacturing method thereof according to claim 1, characterized in that: The first connecting tube (100) and the second connecting tube (300) are both engraved with connecting threads (101) at the ends away from each other, the first connecting tube (100) is provided with a first plate groove (102) and the second connecting tube (300) is provided with a second plate groove (303).

5. A marine low-pressure, high-flow quick connector and a manufacturing method thereof according to claim 4, characterized in that: The first sealing mechanism (500) comprises a first telescopic rod (501) arranged inside the first connecting tube (100); the first telescopic rod (501) is fixedly connected to a first stopper (502) at one end close to the second connecting tube (300); the first telescopic rod (501) is fixedly connected to a first stopper (504) at one end away from the first stopper (502); a first return spring (503) is arranged between the first stopper (504) and the first stopper (502); two ends of the first return spring (503) are fixedly connected to the first stopper (504) and the first stopper (502) respectively; and the first stopper (504) is located inside the first plate groove (102).

6. A marine low-pressure, high-flow quick connector and a manufacturing method thereof according to claim 5, characterized in that: The second sealing mechanism (400) comprises a second telescopic rod (401) arranged inside the second connecting tube (300); the second telescopic rod (401) is fixedly connected to a second stopper (402) at one end close to the second connecting tube (300); the second telescopic rod (401) is fixedly connected to a second stopper (404) at one end away from the second stopper (402); a second return spring (403) is arranged between the second stopper (404) and the second stopper (402); two ends of the second return spring (403) are fixedly connected to the second stopper (404) and the second stopper (402) respectively; the second stopper (404) is located inside the second plate groove (303); and the first stopper (502) corresponds to the second stopper (402).

7. A marine low-pressure, high-flow quick connector and a manufacturing method thereof according to claim 3, characterized in that: A clamping groove (103) is provided on the outside of the first connecting tube (100), and the clamping groove (103) is in a circular ring shape. The clamping groove (103) surrounds the outside of the first connecting tube (100), and the clamping ball (301) is located inside the clamping groove (103).

8. A marine low-pressure, high-flow quick connector and a manufacturing method thereof according to any one of claims 1 to 7, characterized in that: The specific steps include: Step 1: First, install the first sealing mechanism (500) inside the first connecting pipe (100), then connect the first connecting pipe (100) to the marine pipeline through the connecting thread (101), and at the same time install the second sealing mechanism (400) inside the second connecting pipe (300), and the second connecting pipe (300) is connected to the other end of the marine pipeline; Step 2: When the first connecting pipe (100) and the second connecting pipe (300) are not connected, if water flows through both ends of the marine pipeline, the water pressure will push the baffle to move toward the outlet, and the position of the baffle is moved by the telescopic rod, so that the water flows into between the baffle and the baffle, so the baffle is also affected by the pressure of the water flow and moves toward the outlet, thereby closing the outlet to ensure that the liquid inside the marine pipeline does not leak; Step 3: When the first connecting tube (100) and the second connecting tube (300) need to be connected, the telescopic tube (200) is first pulled to move toward the second connecting tube (300), thereby compressing the telescopic spring (201). At this time, the blocking ball (301) loses the blocking of the telescopic tube (200), and then the first connecting tube (100) is inserted into the second connecting tube (300). At this time, the outer wall of the first connecting tube (100) pushes the blocking ball (301), and the blocking ball (301) moves in the ball groove (302) in a direction away from the first connecting rod, so that the first connecting tube (100) is The connecting pipe (100) can be extended into the second connecting pipe (300) until the locking ball (301) corresponds to the locking groove (103). At this time, the telescopic pipe (200) is released. Under the self-reset function of the telescopic spring (201), the telescopic pipe (200) is bounced up by the telescopic spring (201) and moves toward the first connecting pipe (100). During the movement of the telescopic pipe (200), the locking ball (301) is pushed until the locking ball (301) enters the locking groove (103). At this time, the first connecting pipe (100) and the second connecting pipe (300) are connected. Step 4: When the first connecting pipe (100) and the second connecting pipe (300) are connected, the first stopper (502) and the second stopper (402) abut against each other, and then the liquid flowing inside the marine pipeline will press the baffle through pressure, thereby causing the telescopic rod to shrink and compressing the return spring. In this way, the baffle and the stopper are close to each other, leaving a gap between the connecting pipes, allowing the liquid to flow inside the gap.

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