Quick-change connection type multipurpose connector for pipeline connection

Abstract

The invention relates to the technical field of quick pipe joints, in particular to a quick-change type multipurpose joint for pipeline connection, which comprises a quick-plug joint and a quick-change structure arranged at the end of the quick-plug joint, the quick-change structure is composed of a plug and a joint, and a pressure adjusting structure is arranged on the inner wall of the quick-plug joint. The end, away from the quick-change structure, of the quick-plug connector is provided with a clamping sleeve. The defects in the prior art are overcome, fluid enters the miniature Venturi tube through the bypass channel, the flow speed of the fluid is increased, a low-pressure area is formed in the throat portion of the miniature Venturi tube, the low-pressure area sucks more fluid into the pressure relief cavity, the pressure of the pressure relief cavity is gradually increased, the memory alloy valve is pushed open, and pressure is released to the low-pressure side; when the pressure difference is reduced, the fluid pressure pushes the second plug to resist the spring force, the second plug is opened, and the main channel is opened.

Description

Technical Field

[0001] The invention relates to the technical field of quick-type pipe joints, in particular to a quick-change multi-purpose joint for pipeline connection. Background Art

[0002] As a key connection component in fluid delivery systems, quick-change connectors are widely used in hydraulic transmission, petrochemical, aerospace, medical equipment and other fields. Their core function is to achieve rapid connection and separation of pipelines while ensuring medium sealing and pressure stability.

[0003] However, as industrial equipment develops towards high pressure, high frequency and high precision, the technical bottleneck of traditional quick-change connectors has become increasingly prominent. In high-pressure systems (such as hydraulic systems above 35MPa), when traditional connectors are directly connected, due to the large pressure difference on both sides, they need to rely on manual pressure relief or complex external pressure relief devices, which are inefficient and pose safety risks. In addition, instantaneous pressure shocks can easily cause damage to the sealing ring or deformation of the interface, greatly shortening the life of the components; when the quick-change connector is disconnected, if high-pressure media remains in the pipeline, the traditional connector lacks a controllable static pressure relief mechanism, which can easily cause media splashing, backflow or environmental pollution;

[0004] Although some improvement schemes have attempted to introduce solenoid valve control or external sensors in recent years, problems such as dependence on external energy supply, complex structure and high failure rate have not been fundamentally solved. Therefore, there is an urgent need for a quick-change connector technology that can autonomously sense pressure changes, dynamically balance pressure differences and achieve multi-scenario adaptive sealing. To this end, a quick-change multi-purpose connector for pipeline connection is proposed. Summary of the invention

[0005] In view of the deficiencies of the prior art, the present invention provides a quick-change multi-purpose connector for pipe connection, which overcomes the deficiencies of the prior art and solves the problems mentioned in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solution: a quick-change multi-purpose connector for pipe connection, comprising a quick-change connector and a quick-change structure arranged at the end of the quick-change connector, the quick-change structure is composed of a plug and a connector, the inner wall of the quick-change connector is provided with a pressure regulating structure, and a clamping sleeve is arranged and installed at one end of the quick-change connector away from the quick-change structure;

[0007] The joint comprises a quick-change joint, a self-locking cylinder sleeved on the outer wall of the quick-change joint, a second spring arranged between the quick-change joint and the self-locking cylinder, a card interface formed on the inner wall of the quick-change joint, and a steel ball arranged inside the card interface;

[0008] The plug comprises a pipe connection plug, a spherical groove provided on the outer wall of the pipe connection plug, a first limit frame fixedly installed on the inner wall of the pipe connection plug, a first plug provided at the output port of the pipe connection plug, and a first spring connected between the first limit frame and the first plug;

[0009] The pressure regulating structure includes a venturi tube, a pressure relief chamber, a bypass channel and a second plug;

[0010] The pressure relief chamber surrounds the periphery of the Venturi tube, a through hole communicating with the pressure relief chamber is provided on the Venturi tube, a high-pressure resistant metal layer is fixedly installed on the inner wall of the pressure relief chamber close to the through hole, and a honeycomb porous structure is formed inside the high-pressure resistant metal layer, the top of the bypass channel is located above the Venturi tube, and the bottom end is communicated with the pressure relief chamber, a micro Venturi tube is fixedly installed inside the bypass channel, and a memory alloy valve is provided at the outlet of the pressure relief chamber.

[0011] When the pipe connector and the high-pressure fluid pipeline are assembled, the pipe connector is quickly connected to the quick-change connector by squeezing the self-locking cylinder downward to release the restriction between the steel ball inside the card interface and the limit boss, so that the steel ball can move from the inside of the card interface to the unlocking chamber. Then the end of the self-locking cylinder is inserted into the inside of the quick-change connector, and the first plug at the end of the pipe connector plug can first contact the second limit frame, and the high-pressure fluid inside the pipe connector plug enters the quick-change connector through the pipe connector plug. At this time, a compression spring is installed on the back side of the second plug. Under normal circumstances, the spring force closes the valve, and the main channel inside the quick-change connector is blocked by the second plug and cannot flow. Therefore, the high-pressure fluid enters the micro-Venturi tube through the bypass channel, and the fluid flow rate is accelerated to form a low-pressure area at the throat of the micro-Venturi tube. The low-pressure area draws more fluid into the pressure relief chamber. As the pressure in the pressure relief chamber gradually increases, the memory alloy valve is pushed open to the low pressure chamber. The pressure on the pressure side is released. When the pressure difference drops to a safe value, when the pressure difference decreases, the fluid pressure pushes the second plug to resist the spring force, the second plug opens, and the main channel opens. When the main channel is opened, the fluid has a high-pressure pulse. The three-dimensional tube directly forms a new negative pressure area through the Venturi tube, and uses the negative pressure area to suck the high-pressure area fluid into the pressure relief chamber. The pressure in the pressure relief chamber gradually increases, pushing the memory alloy valve to release the pressure to the low-pressure side, thereby forming a main-auxiliary collaborative system. The two have clear division of labor and jointly cover the full working condition requirements of the quick-change connector. When the quick-change connector is disconnected, the system usually stops flowing, and it is impossible to rely on dynamic mechanisms such as the Venturi effect to relieve pressure. When disconnected, the system temperature drops, the memory alloy shrinks, and the memory alloy valve is delayed to close to ensure the pressure relief window period. At the same time, the bypass channel retains microporous pressure relief. When the pressure difference returns to zero, the memory alloy valve is fully restored and fully closed.

[0012] As a preferred technical solution of the present invention, a pair of first sealing rings are provided on the inner wall of the quick-change connector, the quick-change connector and the pipe connector are matched in size and structure, the quick-plug connector and the quick-change connector are rotatably connected, and a second sealing ring is configured and installed between the quick-plug connector and the quick-change connector.

[0013] The quick-insert connector and the quick-change connector can be rotatably adjusted, and the first sealing ring can play a sealing role when the quick-change connector is connected to the pipe connector plug.

[0014] As a preferred technical solution of the present invention, a limiting boss is formed on the inner wall of the self-locking cylinder. Under the action of the second spring, the limiting boss is initially in the same horizontal plane as the steel ball, an unlocking cavity is formed on the top of the limiting boss, and anti-slip grooves are formed on the outer wall of the self-locking cylinder.

[0015] The anti-slip pattern on the outer wall of the self-locking cylinder can increase the friction force to facilitate the downward movement of the self-locking cylinder. The limiting boss gradually releases the restriction on the steel ball as the self-locking cylinder moves downward, so that the pipe connector can be inserted into the quick-change connector, and the steel ball and the spherical slot are subsequently connected to each other. After the connection is completed, the force of the second spring on the self-locking cylinder is used to reset the limiting boss and lock the steel ball.

[0016] As a preferred technical solution of the present invention, a second limit frame is fixedly installed on the inner wall of the quick-connect connector above the venturi tube, a throat is formed in the middle of the venturi tube, and the fluid flows through the throat to form a low-pressure suction area.

[0017] The pressure energy of the fluid on the high-pressure side is converted into kinetic energy in the Venturi tube, and then low-pressure suction is generated through the Bernoulli effect. The "suction force" of the low-pressure area in the throat of the Venturi tube is much greater than the natural pressure difference between the pressure relief chamber and the throat, forming forced drainage. The pressure in the pressure relief chamber is the middle value of the dynamic change, between the high-pressure side (inlet) and the low-pressure area of ​​the throat, forming a stepped pressure difference, ensuring the directional flow of the fluid from the high-pressure side → throat → pressure relief chamber → low-pressure side.

[0018] As a preferred technical solution of the present invention, the inner wall of the bypass channel is coated with a polytetrafluoroethylene coating.

[0019] The PTFE coating on the inner wall of the bypass channel can prevent clogging by oil or viscous liquid.

[0020] As a preferred technical solution of the present invention, the memory alloy valve is made of Nitinol shape memory alloy, and its phase transition temperature is 40-60°C. When the system pressure exceeds the preset threshold or the temperature reaches the phase transition temperature, the memory alloy valve automatically opens to achieve pressure balance.

[0021] As a preferred technical solution of the present invention, a third limiting frame is fixedly installed on the inner wall of the quick-connect connector below the second plug, and a third spring is installed between the third limiting frame and the second plug.

[0022] A compression spring is installed on the back side of the second plug. Under normal circumstances, the spring force closes the valve. When the pressure difference decreases, the fluid pressure pushes the second plug to resist the spring force, and the second plug opens.

[0023] As a preferred technical solution of the present invention, a conical annular area is formed on the inner wall of the quick-connect connector near one end of the clamping sleeve, and a pair of third sealing rings are installed on the inner wall of the quick-connect connector on one side of the conical annular area.

[0024] The conical annular area can cooperate with the outer wedge area on the clamping sleeve. When the pipe is inserted into the quick-connect connector through the clamping sleeve, the clamping sleeve is pulled outward, and the outer wedge area can contact the conical annular area and deform to clamp the pipe, thereby realizing quick plug-in installation of the pipe.

[0025] As a preferred technical solution of the present invention, a plurality of claw clamps are formed on the clamping sleeve, and the outer surface of each claw clamp is formed with an outer wedge-shaped area matching the conical annular area, and the inner wall of the claw clamp is formed with an inner wedge-shaped area.

[0026] The inner wedge-shaped area can clamp the outer wall of the plug-in pipe to achieve a quick locking effect.

[0027] As a preferred technical solution of the present invention, a limit clamp is installed on the outer wall of the coupling sleeve close to the quick-connect connector, and the limit clamp is matched with the structural dimensions of the coupling sleeve.

[0028] The limit clamp can prevent the loosening between the card sleeve and the quick plug connector, which may cause the pipe to loosen.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] 1. The high-pressure fluid on the inside of the pipe connector plug enters the inside of the quick-change connector through the pipe connector plug. At this time, a compression spring is installed on the back side of the second plug. Under normal circumstances, the spring force closes the valve, and the main channel inside the quick-change connector is blocked by the second plug and cannot flow. Therefore, the high-pressure fluid enters the micro-Venturi tube through the bypass channel, and the fluid flow rate is accelerated and a low-pressure area is formed at the throat of the micro-Venturi tube. The low-pressure area draws more fluid into the pressure relief chamber. As the pressure in the pressure relief chamber gradually increases, the memory alloy valve is pushed open to release the pressure to the low-pressure side. When the pressure difference drops to a safe value, when the pressure difference decreases, the fluid pressure pushes the second plug to resist the spring force, the second plug opens, and the main channel opens. When the main channel is opened and a high-pressure pulse appears in the fluid, the three-dimensional directly forms a new negative pressure area through the Venturi tube, and uses the negative pressure area to suck the high-pressure area fluid into the pressure relief chamber. When the pressure in the pressure relief chamber gradually increases, the memory alloy valve is pushed open to release the pressure to the low-pressure side, thereby forming a main-auxiliary collaborative system. The two have clear division of labor and jointly cover the full working conditions of the quick-change connector.

[0031] 2. When the quick-change connector is disconnected, the system usually stops flowing, and the pressure cannot be relieved by dynamic mechanisms such as the Venturi effect. When disconnected, the system temperature drops, the memory alloy contracts, and the memory alloy valve is closed later to ensure the pressure relief window period. At the same time, the bypass channel retains microporous pressure relief. When the pressure difference returns to zero, the memory alloy valve is fully restored and fully closed. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a three-dimensional schematic diagram of the present invention;

[0033] Figure 2 It is a front view schematic diagram of the present invention;

[0034] Figure 3 For the present invention Figure 2 Schematic diagram of the cross section at AA;

[0035] Figure 4 It is a cross-sectional schematic diagram of the pipe connector of the present invention;

[0036] Figure 5 It is a cross-sectional schematic diagram of a quick-insert connector and a quick-change connector of the present invention;

[0037] Figure 6 It is a cross-sectional perspective schematic diagram of the quick-insert connector of the present invention;

[0038] Figure 7 It is a schematic diagram of the card socket of the present invention;

[0039] Figure 8 For the present invention Figure 5 A partial enlarged schematic diagram in the middle;

[0040] Fig. 9 For the present invention Figure 6A partial enlarged schematic diagram of point B in the middle.

[0041] In the figure: 1, quick-connect connector; 2, quick-change connector; 3, pipe connector; 301, spherical groove; 302, first limit frame; 303, first plug; 304, first spring; 4, card sleeve; 5, self-locking cylinder; 501, unlocking chamber; 502, limit boss; 6, card interface; 7, steel ball; 8, second spring; 9, first sealing ring; 10, second sealing ring; 11, second limit frame; 12, Venturi tube; 13, pressure relief chamber; 14, through hole; 15, high-pressure resistant metal layer; 16, memory alloy valve; 17, bypass channel; 18, micro Venturi tube; 19, third limit frame; 20, third spring; 21, second plug; 22, conical annular area; 23, third sealing ring; 24, limit clamp; 25, outer wedge area; 26, inner wedge area. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] See also Figure 1-9 A quick-change multi-purpose connector for pipe connection, comprising a quick-connect connector 1 and a quick-change structure arranged at the end of the quick-connect connector 1, the quick-change structure is composed of a plug and a connector, the inner wall of the quick-connect connector 1 is provided with a pressure regulating structure, and a clamping sleeve 4 is arranged and installed at one end of the quick-connect connector 1 away from the quick-change structure;

[0044] The connector includes a quick-change connector 2, a self-locking cylinder 5 sleeved on the outer wall of the quick-change connector 2, a second spring 8 disposed between the quick-change connector 2 and the self-locking cylinder 5, a card interface 6 formed on the inner wall of the quick-change connector 2, and a steel ball 7 disposed inside the card interface 6;

[0045] The plug includes a pipe connection plug 3, a spherical groove 301 provided on the outer wall of the pipe connection plug 3, a first limit frame 302 fixedly installed on the inner wall of the pipe connection plug 3, a first plug 303 provided at the output port of the pipe connection plug 3, and a first spring 304 connected between the first limit frame 302 and the first plug 303;

[0046] The pressure regulating structure includes a venturi tube 12, a pressure relief chamber 13, a bypass channel 17 and a second plug 21;

[0047] The pressure relief chamber 13 surrounds the outer periphery of the venturi tube 12, and a through hole 14 communicating with the pressure relief chamber 13 is opened on the venturi tube 12. A high-pressure resistant metal layer 15 is fixedly installed on the inner wall of the pressure relief chamber 13 near the through hole 14, and a honeycomb porous structure is formed inside the high-pressure resistant metal layer 15. The top of the bypass channel 17 is located above the venturi tube 12, and the bottom end is communicated with the pressure relief chamber 13. A micro venturi tube 18 is fixedly installed inside the bypass channel 17, and a memory alloy valve 16 is provided at the outlet of the pressure relief chamber 13.

[0048] When the pipe connector 3 is assembled with the high-pressure fluid pipeline, when the pipe connector 3 is quickly connected to the quick-change connector 2, the self-locking cylinder 5 is squeezed downward to release the restriction between the steel ball 7 inside the card interface 6 and the limiting boss 502, so that the steel ball 7 can move from the inside of the card interface 6 to the unlocking chamber 501, and then the end of the self-locking cylinder 5 is inserted into the inside of the quick-change connector 2, and the first plug 303 at the end of the pipe connector 3 can first contact the second limiting frame 11, and the high-pressure fluid inside the pipe connector 3 enters the quick-change connector 2 through the pipe connector 3. At this time, a compression spring is installed on the back side of the second plug 21. Under normal circumstances, the spring force closes the valve, and the main channel inside the quick-change connector 2 is blocked by the second plug 21 and cannot flow. Therefore, the high-pressure fluid enters the micro-venturi tube 18 through the bypass channel 17, and the fluid flow rate is accelerated to form a low-pressure area at the throat of the micro-venturi tube 18. The low-pressure area draws more fluid into the pressure relief chamber 13. As the pressure in the pressure relief chamber 13 gradually increases, the pressure is pushed Open the memory alloy valve 16 to release the pressure to the low-pressure side. When the pressure difference drops to a safe value, when the pressure difference decreases, the fluid pressure pushes the second plug 21 to resist the spring force, the second plug 21 opens, and the main channel opens. When the main channel is opened, the fluid has a high-pressure pulse. The three-dimensional image directly forms a new negative pressure area through the Venturi tube 12, and uses the negative pressure area to suck the high-pressure area fluid into the pressure relief chamber 13. When the pressure in the pressure relief chamber 13 gradually increases, the memory alloy valve 16 is pushed open to release the pressure to the low-pressure side, thereby forming a main-auxiliary collaborative system. The two have clear division of labor and jointly cover the full working condition requirements of the quick-change joint. When the quick-change joint is disconnected, the system usually stops flowing, and it is impossible to rely on dynamic mechanisms such as the Venturi effect to relieve pressure. When disconnected, the system temperature drops, the memory alloy shrinks, and the memory alloy valve 16 is closed later to ensure the pressure relief window period. At the same time, the bypass channel 17 retains microporous pressure relief. When the pressure difference returns to zero, the memory alloy valve 16 is fully restored and fully closed.

[0049] Specifically, a pair of first sealing rings 9 are provided on the inner wall of the quick-change connector 2, the quick-change connector 2 and the pipe plug 3 are matched in size and structure, the quick-plug connector 1 and the quick-change connector 2 are rotationally connected, and a second sealing ring 10 is configured and installed between the quick-plug connector 1 and the quick-change connector 2, the quick-plug connector 1 and the quick-change connector 2 can be rotationally adjusted, and the first sealing ring 9 can play a sealing role when the quick-change connector 2 is connected to the pipe plug 3.

[0050] Specifically, a limiting boss 502 is formed on the inner wall of the self-locking cylinder 5. Under the action of the second spring 8, the limiting boss 502 is initially in the same horizontal plane with the steel ball 7. An unlocking cavity 501 is formed on the top of the limiting boss 502. The outer wall of the self-locking cylinder 5 is formed with anti-slip grooves. The anti-slip grooves on the outer wall of the self-locking cylinder 5 can increase the friction force to facilitate the downward movement of the self-locking cylinder 5. The limiting boss 502 gradually releases the restriction on the steel ball 7 in the process of following the downward movement of the self-locking cylinder 5, so that the pipe connector 3 can be plugged into the inside of the quick-change connector 2, and the steel ball 7 and the spherical groove 301 are subsequently used to engage with each other. After the docking is completed, the force of the second spring 8 on the self-locking cylinder 5 is used to reset the limiting boss 502 and lock the steel ball 7.

[0051] Specifically, a second limit frame 11 is fixedly installed on the inner wall of the quick-connect connector 1 above the venturi tube 12, and a throat is formed in the middle of the venturi tube 12. The fluid flows through the throat to form a low-pressure suction area. The pressure energy of the fluid on the high-pressure side is converted into kinetic energy in the venturi tube 12, and then low-pressure suction is generated through the Bernoulli effect. The "suction force" of the low-pressure area in the throat of the venturi tube 12 is much greater than the natural pressure difference between the pressure relief chamber 13 and the throat, forming forced drainage. The pressure in the pressure relief chamber is the middle value of the dynamic change, which is between the high-pressure side inlet and the low-pressure area of ​​the throat, forming a stepped pressure difference, ensuring the directional flow of the fluid from the high-pressure side → throat → pressure relief chamber → low-pressure side.

[0052] Specifically, the inner wall of the bypass channel 17 is coated with a polytetrafluoroethylene coating, and the polytetrafluoroethylene coating coated on the inner wall of the bypass channel 17 can prevent clogging by oil or viscous liquid.

[0053] Specifically, the memory alloy valve 16 is made of Nitinol shape memory alloy, and its phase transition temperature is 40-60° C. When the system pressure exceeds a preset threshold or the temperature reaches the phase transition temperature, the memory alloy valve 16 automatically opens to achieve pressure balance.

[0054] Specifically, a third limit frame 19 is fixedly installed on the inner wall of the quick-connect connector 1 below the second plug 21, a third spring 20 is installed between the third limit frame 19 and the second plug 21, and a compression spring is installed on the back side of the second plug 21. Under normal circumstances, the spring force closes the valve. When the pressure difference decreases, the fluid pressure pushes the second plug 21 to counteract the spring force, and the second plug 21 opens.

[0055] Specifically, a conical annular area 22 is formed on the inner wall of the quick-connect connector 1 near one end of the clamping sleeve 4, and a pair of third sealing rings 23 are installed on the inner wall of the quick-connect connector 1 on one side of the conical annular area 22. The conical annular area 22 can cooperate with the outer wedge-shaped area 25 on the clamping sleeve 4. When the pipe is inserted into the quick-connect connector 1 through the clamping sleeve 4, the clamping sleeve 4 is pulled outward, and the outer wedge-shaped area 25 can contact with the conical annular area 22 and deform to clamp the pipe, thereby realizing quick plug-in installation of the pipe.

[0056] Specifically, a plurality of claw clamps are formed on the clamping sleeve 4, and the outer surface of each claw clamp is formed with an outer wedge-shaped area 25 that matches the conical annular area 22, and the inner wall of the claw clamp is formed with an inner wedge-shaped area 26. The inner wedge-shaped area 26 can clamp the outer wall of the plug-in pipe to achieve a quick locking effect.

[0057] Specifically, a limit clamp 24 is installed on the outer wall of the clamping sleeve 4 close to the quick connector 1. The limit clamp 24 is matched with the structural size of the clamping sleeve 4. The limit clamp 24 can prevent the clamping sleeve 4 and the quick connector 1 from loosening, which may cause the pipe to loosen.

[0058] Working principle: first, after the pipe connector 3 is assembled with the high-pressure fluid pipeline, when the pipe connector 3 is quickly docked with the quick-change connector 2, the self-locking cylinder 5 is squeezed downward to release the restriction between the steel ball 7 inside the card interface 6 and the limiting boss 502, so that the steel ball 7 can move from the inside of the card interface 6 to the unlocking chamber 501, and then the end of the self-locking cylinder 5 is inserted into the inside of the quick-change connector 2, and the first plug 303 at the end of the pipe connector 3 can first contact the second limiting frame 11, and the high-pressure fluid inside the pipe connector 3 enters the quick-change connector 2 through the pipe connector 3. At this time, a compression spring is installed on the back side of the second plug 21. Under normal circumstances, the spring force closes the valve, and the main channel inside the quick-change connector 2 is blocked by the second plug 21 and cannot flow. Therefore, the high-pressure fluid enters the micro-Venturi tube 18 through the bypass channel 17, and the fluid flow rate is accelerated to form a low-pressure area at the throat of the micro-Venturi tube 18. The low-pressure area draws more fluid into the pressure relief chamber 13. As the pressure in the pressure relief chamber 13 gradually increases, the pressure in the pressure relief chamber 13 gradually increases. When the pressure difference is reduced to a safe value, the fluid pressure pushes the second plug 21 to resist the spring force, the second plug 21 is opened, and the main channel is opened. When the main channel is opened, the fluid has a high-pressure pulse. The three-dimensional image directly forms a new negative pressure area through the venturi tube 12, and uses the negative pressure area to suck the high-pressure area fluid into the pressure relief chamber 13. When the pressure in the pressure relief chamber 13 gradually increases, the memory alloy valve 16 is pushed open to release the pressure to the low-pressure side, thereby forming a main-auxiliary collaborative system. The two have clear division of labor and jointly cover the full working condition requirements of the quick-change joint. When the quick-change joint is disconnected, the system usually stops flowing, and the dynamic mechanism such as the Venturi effect cannot be relied on to relieve pressure. When disconnected, the system temperature drops, the memory alloy contracts, and the memory alloy valve 16 is closed later to ensure the pressure relief window period. At the same time, the bypass channel 17 retains microporous pressure relief. When the pressure difference returns to zero, the memory alloy valve 16 is fully restored and fully closed.

[0059] Finally, it should be noted that in the description of the present invention, it should be noted that the terms "vertical", "up", "down", "horizontal", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0060] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0061] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention is described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A quick-change multi-purpose connector for pipe connection, comprising a quick-connect connector (1) and a quick-change structure arranged at the end of the quick-connect connector (1), characterized in that: The quick-change structure is composed of a plug and a connector, the inner wall of the quick-connect connector (1) is provided with a pressure regulating structure, and a clamping sleeve (4) is installed at one end of the quick-connect connector (1) away from the quick-change structure; The joint comprises a quick-change joint (2), a self-locking cylinder (5) sleeved on the outer wall of the quick-change joint (2), a second spring (8) arranged between the quick-change joint (2) and the self-locking cylinder (5), a card interface (6) formed on the inner wall of the quick-change joint (2), and a steel ball (7) arranged inside the card interface (6); The plug comprises a pipe connection plug (3), a spherical groove (301) provided on the outer wall of the pipe connection plug (3), a first limit frame (302) fixedly mounted on the inner wall of the pipe connection plug (3), a first plug (303) provided at the output port of the pipe connection plug (3), and a first spring (304) connected between the first limit frame (302) and the first plug (303); The pressure regulating structure comprises a venturi tube (12), a pressure relief chamber (13), a bypass channel (17) and a second plug (21); The pressure relief chamber (13) surrounds the periphery of the venturi tube (12); a through hole (14) communicating with the pressure relief chamber (13) is provided on the venturi tube (12); a high-pressure resistant metal layer (15) is fixedly installed on the inner wall of the pressure relief chamber (13) near the through hole (14); a honeycomb-shaped porous structure is formed inside the high-pressure resistant metal layer (15); the top of the bypass channel (17) is located above the venturi tube (12), and the bottom end is communicated with the pressure relief chamber (13); a micro venturi tube (18) is fixedly installed inside the bypass channel (17); and a memory alloy valve (16) is provided at the outlet of the pressure relief chamber (13).

2. The quick-change multi-purpose connector for pipe connection according to claim 1, characterized in that: The inner wall of the quick-change connector (2) is provided with a pair of first sealing rings (9); the quick-change connector (2) and the pipe connector plug (3) are compatible in size and structure; the quick-plug connector (1) and the quick-change connector (2) are rotatably connected; and a second sealing ring (10) is arranged and installed between the quick-plug connector (1) and the quick-change connector (2).

3. The quick-change multi-purpose connector for pipe connection according to claim 1, characterized in that: The inner wall of the self-locking cylinder (5) is formed with a limiting boss (502), and the limiting boss (502) is initially located at the same horizontal plane as the steel ball (7) under the action of the second spring (8), an unlocking cavity (501) is formed at the top of the limiting boss (502), and the outer wall of the self-locking cylinder (5) is formed with anti-slip grooves.

4. The quick-change multi-purpose connector for pipe connection according to claim 1, characterized in that: A second limiting frame (11) is fixedly mounted on the inner wall of the quick-connect connector (1) above the venturi tube (12). A throat is formed in the middle of the venturi tube (12), and a low-pressure suction zone is formed when fluid flows through the throat.

5. The quick-change multi-purpose connector for pipe connection according to claim 1, characterized in that: The inner wall of the bypass channel (17) is coated with a polytetrafluoroethylene coating.

6. The quick-change multi-purpose connector for pipe connection according to claim 1, characterized in that: The memory alloy valve (16) is made of Nitinol shape memory alloy, and its phase transition temperature is 40-60° C. When the system pressure exceeds a preset threshold or the temperature reaches the phase transition temperature, the memory alloy valve (16) automatically opens to achieve pressure balance.

7. The quick-change multi-purpose connector for pipe connection according to claim 1, characterized in that: A third limiting frame (19) is fixedly mounted on the inner wall of the quick-connect connector (1) below the second plug (21), and a third spring (20) is arranged and mounted between the third limiting frame (19) and the second plug (21).

8. The quick-change multi-purpose connector for pipe connection according to claim 1, characterized in that: The inner wall of the quick-connect connector (1) close to one end of the clamping sleeve (4) is formed with a conical annular area (22), and a pair of third sealing rings (23) are arranged and installed on the inner wall of the quick-connect connector (1) on one side of the conical annular area (22).

9. The quick-change multi-purpose connector for pipe connection according to claim 1, characterized in that: The clamping sleeve (4) is provided with a plurality of claw clamps, and the outer surface of each claw clamp is provided with an outer wedge-shaped area (25) matching with the conical annular area (22), and the inner wall of each claw clamp is provided with an inner wedge-shaped area (26).

10. The quick-change multi-purpose connector for pipe connection according to claim 1, characterized in that: A limit clamp (24) is installed on the outer wall of the clamp sleeve (4) on one side close to the quick-connect connector (1), and the limit clamp (24) matches the structural dimensions of the clamp sleeve (4).

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