Self-locking fluid joint structure with function of uniformly distributing locking force and unlocking force

Abstract

The invention discloses a self-locking fluid connector structure with a function of uniformly distributing locking force and unlocking force, and belongs to the technical field of fluid pipeline connecting pieces. Which comprises a male plug mechanism, a female plug mechanism, a male and female plug locking and unlocking mechanism and a fluid pipeline connector, and is characterized in that the male and female plug locking and unlocking mechanism comprises a lock ring, a reset spring, an unlocking sliding sleeve, an unlocking sliding sleeve limiting piece and a set of locking and unlocking pin rollers, the lock ring is arranged on the female plug mechanism, the reset spring is arranged outside the female plug mechanism in a sleeving mode, and the unlocking sliding sleeve limiting piece is arranged on the unlocking sliding sleeve limiting piece. The unlocking sliding sleeve is arranged outside the female plug mechanism through the unlocking sliding sleeve cavity, the left end of the unlocking sliding sleeve cavity is provided with an unlocking sliding sleeve left-right displacement stroke limiting rib, the unlocking sliding sleeve limiting piece is embedded in the female plug mechanism, and the number of the locking and unlocking pin rollers in one set is three. The method has the advantages that the operation balance and convenience are embodied; the problems of looseness, vibration and deflection in a locking state due to inconsistent stress and loss of rapidness and convenience in unlocking are avoided; and the rationality of the structure is well reflected.

Description

Technical Field

[0001] The present invention belongs to the technical field of fluid pipeline connectors, and particularly relates to a self-locking fluid joint structure with a uniform distribution function of locking force and unlocking force. Background Art

[0002] As is known in the industry, servers such as file servers, database servers, application servers, WEB servers, cloud servers, and backup servers play a crucial role in the network. Since they store and process a vast amount of data and information on the network, they can be regarded as the soul of the network. Servers provide various services for client computers, such as centralized computing, information publishing, and data management, etc. Since servers usually run continuously throughout the day and night, in order to improve their heat dissipation efficiency, reduce energy consumption, reduce noise, and adapt to different working environments, it is necessary to implement fluid cooling (usually water cooling) for them. Therefore, the aforementioned fluid joints are required in the system implementing fluid cooling. In addition, in the new energy industry, as supporting infrastructure, ultra-fast charging piles and energy storage devices also need to use fluid cooling to adapt to the high heat generated by high-voltage platforms. And to meet the high cruising range design requirements of electric vehicles, it is necessary to ensure that more space in the battery pack can be used to arrange battery cells to improve the volume utilization rate. At the same time, in liquid-cooled power batteries, in order to improve the assembly rhythm, corresponding fluid joint structures are also used in their cooling water circuits.

[0003] The technical information of the above fluid connector can be found in publicly available Chinese patent documents. Typically, for example, CN202011236U discloses a "quick-insert connector for a water cooling system of a data processing center", which includes a male head body and a female head body. On the male head body and around the circumferential direction of the male head body, a pair of grooves spaced 180° from each other are provided. In each of the pair of grooves, a pressing assembly composed of a spring and a pressing block is arranged. In return, on the female head body and at positions corresponding to the pair of grooves, a pair of through grooves are provided. When the male and female head bodies are inserted, the operator presses the pressing assembly with two fingers. When the male head body is inserted to the extent that the pair of pressing assemblies thereon correspond to the pair of through grooves, the pressing block automatically enters the through groove under the action of the spring of the pressing assembly to complete the insertion connection with each other, and vice versa. Although this patent can achieve the advantages described in paragraphs 0021-0022 of its specification, there are the following deficiencies: First, there is a risk of single-point failure because the pair of pressing assemblies act independently. When any one fails, only unilateral force is left, so it is impossible to avoid connection skew or looseness. Moreover, it is difficult or even impossible to ensure consistency in the force applied to the pressing assembly and the fatigue resistance (fatigue degree of the spring) during long-term repeated plugging and unplugging connections. Second, the pressing assembly needs to be pressed simultaneously to be pulled out, which cannot be performed if the space is narrow or when wearing gloves. Third, the pressing block and the through groove rub against each other repeatedly, easily resulting in contact wear, and it is inevitable to have a loosening situation after long-term use. Fourth, when the male and female head bodies are in a separated state, because the pair of pressing assemblies are exposed and lack protection, it is possible to separate from the groove and cannot be used continuously. Also, CN222334783U introduces a "self-locking quick-change fluid connector". According to the description in paragraph 0027 of the specification of this patent, although the positioning lock piece can lock or unlock the inserted connecting male head, there are the following deficiencies: First, since the positioning lock piece is subjected to unilateral force, it is easy to cause wear or failure. Second, stress concentration occurs. After repeated use, the contact surface of the arc-shaped claw is easily worn, affecting the locking reliability of the connecting male head. Third, there is an off-axis load problem, and it is impossible to make the locking force distribution relatively uniform.

[0004] The reason for designing the connector to have a structure that can be both plugged and separated is mainly but not limited to the following considerations: equipment maintenance and repair, modular component assembly and disassembly, removal of medium residue or contamination for cleaning, emergency disconnection (such as sudden leakage), space saving or avoidance of interference. In addition, if the male and female head bodies are threadedly connected to each other, then the disassembly and assembly connection are time-consuming and cannot be operated by hand, etc.

[0005] In summary, it has good positive significance to explore a self-locking fluid connector that can make up for the above deficiencies and make the structure more reasonable and the function more perfect. The technical solution to be introduced below is generated under this background. Summary of the Invention

[0006] The object of the present invention is to provide a self-locking fluid joint structure with a function of evenly distributing locking force and unlocking force, which helps to directly and smoothly plug and connect a male plug mechanism and a female plug mechanism manually, reflects the convenience of operation, is conducive to reflecting the balanced distribution of the force for locking or unlocking the male plug mechanism and the female plug mechanism, thus avoiding loosening, vibration and deflection caused by inconsistent force during the locked state and being inefficient and clumsy when unlocking, and is beneficial to ensuring labor-saving operation when separating the male plug mechanism and the female plug mechanism, thereby reflecting the rationality of the structure.

[0007] The object of the present invention is achieved as follows. A self-locking fluid joint structure with a function of evenly distributing locking force and unlocking force includes a male plug mechanism, a female plug mechanism, a male-female plug locking and unlocking mechanism, and a fluid pipeline joint. The male plug mechanism and the female plug mechanism are correspondingly arranged left and right, and are plugged and connected or disconnected from each other under the action of the male-female plug locking and unlocking mechanism. The male-female plug locking and unlocking mechanism is arranged on the female plug mechanism, and the fluid pipeline joint is connected to one end of the female plug mechanism away from the male plug mechanism. It is characterized in that the male-female plug locking and unlocking mechanism includes a lock ring, a return spring, an unlocking sliding sleeve, an unlocking sliding sleeve limiting member, and a set of locking and unlocking rollers. The lock ring is arranged on the female plug mechanism to be displaceable left and right. The return spring is sleeved outside the female plug mechanism, and the left end of the return spring abuts against the right side of the lock ring, while the right end of the return spring abuts against the female plug mechanism. The unlocking sliding sleeve is formed with an unlocking sliding sleeve cavity penetrating from the left end to the right end, and the unlocking sliding sleeve is arranged outside the female plug mechanism to be displaceable left and right through the unlocking sliding sleeve cavity. At the left end of the unlocking sliding sleeve cavity of the unlocking sliding sleeve and around the circumferential direction of the cavity wall, there is an unlocking sliding sleeve left-right displacement stroke limiting rib protruding from the cavity wall surface of the unlocking sliding sleeve cavity. The left side surface of the lock ring corresponds to the right side surface of the unlocking sliding sleeve left-right displacement stroke limiting rib. The unlocking sliding sleeve limiting member is embedded on the female plug mechanism at a position on the left side of the lock ring. The distance between the opposite sides of the unlocking sliding sleeve limiting member and the lock ring constitutes the moving space of the unlocking sliding sleeve left-right displacement stroke limiting rib. The unlocking sliding sleeve left-right displacement stroke limiting rib is located within the moving space of the unlocking sliding sleeve left-right displacement stroke limiting rib. The number of a set of locking and unlocking rollers is three, which are evenly distributed at intervals around the circumferential direction of the left end of the female plug mechanism and are resisted by the lock ring. When the set of locking and unlocking rollers loses the resistance of the lock ring and penetrates into the interior of the female plug mechanism, the male plug mechanism is in a locked state of being plugged and connected to the female plug mechanism. When the set of locking and unlocking rollers withdraw from the interior of the female plug mechanism and transfer to the outside of the female plug mechanism and between the cavity wall of the unlocking sliding sleeve cavity of the unlocking sliding sleeve and are resisted by the lock ring, the male plug mechanism is in a non-locked state of being disconnected from the female plug mechanism.

[0008] In a specific embodiment of the present invention, on the right side surface of the lock ring and at positions corresponding to the set of locking and unlocking rollers, locking and unlocking roller resisting grooves are formed at intervals, and the number of the locking and unlocking roller resisting grooves is equal to that of the set of locking and unlocking rollers.

[0009] In another specific embodiment of the present invention, the male plug mechanism includes a male plug housing, a male plug valve core return spring, a male plug valve core return spring support retaining ring, a male plug valve core return spring support retaining ring limiting snap ring, and a male plug valve core. The male plug housing is formed with a male plug housing cavity that penetrates from the left end to the right end for fluid passage. On the outer wall of the left end of the male plug housing, there is formed a male plug housing installation and fixing thread. On the outer wall of the middle part of the male plug housing, there is formed an external hexagonal nut for cooperating with a wrench for assembling and operating the male plug. On the male plug housing and on the right side of the external hexagonal nut, a sealing ring groove construction flange is formed around the circumference of the external hexagonal nut. The space between the sealing ring groove construction flange and the opposite side of the external hexagonal nut forms a sealing ring groove, and a male-female plug mating sealing ring is embedded in the sealing ring groove. On the outer wall of the male plug housing and on the right side of the sealing ring groove construction flange, there is formed a male plug housing locking flange. The space between the male plug housing locking flange and the opposite side of the sealing ring groove construction flange forms a male plug roller locking cavity, and on the male plug housing locking flange, there is formed a male plug housing locking flange guiding surface that gradually rises from right to left. The male plug valve core return spring is arranged in the male plug housing cavity, and the left end of the male plug valve core return spring is supported on the right side surface of the male plug valve core return spring support retaining ring, while the right end of the male plug valve core return spring is supported on the male plug valve core return spring support step formed at the left end of the male plug valve core. The male plug valve core return spring support retaining ring is located in the male plug housing cavity, and the right side surface of the male plug valve core return spring support retaining ring abuts against the retaining ring support step surface formed on the cavity wall of the male plug housing cavity. The left side surface of the male plug valve core return spring support retaining ring abuts against the right side surface of the male plug valve core return spring support retaining ring limiting snap ring, and the male plug valve core return spring support retaining ring limiting snap ring is embedded in the male plug return spring support retaining ring limiting snap ring groove formed on the cavity wall of the male plug housing cavity. The male plug valve core is located at the right end of the male plug housing cavity. The right end of the male plug valve core is narrowed, and a male plug valve core sealing ring groove is formed around the circumference of the male plug valve core. A male plug valve core sealing ring for forming a seal with the cavity wall of the male plug housing cavity is arranged in the male plug valve core sealing ring groove. When the set of locking and unlocking rollers extends into the interior of the female plug mechanism and is located in the male plug roller locking cavity, the male plug housing is in a locked state of plugging connection with the female plug mechanism. When the set of locking and unlocking rollers withdraw from the male plug roller locking cavity and transfer to the outside of the female plug mechanism and are located between the cavity wall of the unlocking sleeve cavity of the female plug mechanism and are blocked by the lock ring, the male plug housing is in an unlocked state of releasing the plugging connection with the female plug mechanism.

[0010] In yet another specific embodiment of the present invention, the female plug mechanism includes a female plug housing, a slip ring return spring, a slip ring, and a female plug valve core. The female plug housing defines a female plug housing cavity that penetrates from the left end to the right end. An unlocking sleeve limiting member embedding groove is formed on the outer wall of the left end of the female plug housing and at a position corresponding to the unlocking sleeve limiting member. The unlocking sleeve limiting member is embedded in the unlocking sleeve limiting member embedding groove. A return spring abutting step is formed on the outer wall of the female plug housing and at a position corresponding to the right end of the return spring. The return spring is sleeved on the left end of the female plug housing and is located between the outer wall of the female plug housing and the wall of the unlocking sleeve cavity of the unlocking sleeve cavity. The right end of the return spring abuts against the return spring abutting step. A number of female plug housing roller rolling inclined surfaces equal to the number of the set of locking and unlocking rollers are formed on the outer wall of the female plug housing and at a position corresponding to the left side of the set of locking and unlocking rollers for the set of locking and unlocking rollers to roll on. And a locking and unlocking roller embedding groove is formed at a position corresponding to the left side of the female plug housing roller rolling inclined surface. A roller protruding hole communicating with the female plug housing cavity is formed in the middle of the length direction of the locking and unlocking roller embedding groove. A fluid pipeline joint matching step is formed on the outer wall of the right end of the female plug housing and around the circumferential direction of the female plug housing. The left end face of the fluid pipeline joint contacts the right side face of the step of the fluid pipeline joint matching step. A fluid pipeline joint sealing ring groove and an outer snap ring groove are successively formed on the outer wall of the female plug housing and to the right of the fluid pipeline joint matching step. A fluid pipeline joint sealing ring that is sealingly matched with the inner wall of the left end of the fluid pipeline joint is arranged in the fluid pipeline joint sealing ring groove. An outer snap ring for clamping and fixing with the inner wall of the left end of the fluid pipeline joint is arranged in the outer snap ring groove. The female plug valve core is located in the female plug housing cavity and is positioned at the right end of the female plug housing cavity. The slip ring return spring is located in the female plug housing cavity and is sleeved on the female plug valve core. The left end of the slip ring return spring is supported on the right end of the slip ring, while the right end of the slip ring return spring is supported on the right end of the female plug valve core. The slip ring is arranged to be displaceable left and right in the female plug housing cavity; the male plug housing is inserted and removed in cooperation with the female plug housing cavity.

[0011] In yet another specific embodiment of the present invention, a sealing ring groove for the cavity wall of the female plug housing cavity is formed on the cavity wall of the female plug housing cavity of the female plug housing and along the circumferential direction of the cavity wall. A sealing ring for the cavity wall of the female plug housing cavity is embedded in the sealing ring groove for the cavity wall of the female plug housing cavity. When the male plug housing of the male plug mechanism is in a locked state of being plugged and connected to the female plug housing of the female plug mechanism, the outer wall of the male plug housing forms a sealing fit relationship with the sealing ring for the cavity wall of the female plug housing cavity. When the male plug housing is in an unlocked state of being disconnected from the female plug housing under the action of the rightward displacement of the unlocking sliding sleeve, the return force of the return spring forces the sliding ring to move leftward and reset. The outer wall of the sliding ring forms a sealing fit relationship with the sealing ring for the cavity wall of the female plug housing cavity.

[0012] In still another specific embodiment of the present invention, a sealing ring groove for the female plug valve core is formed along the circumferential direction at the left end of the female plug valve core. A sealing ring for the female plug valve core is nested in the sealing ring groove for the female plug valve core. When the male plug housing of the male plug mechanism is in an unlocked state of being disconnected from the female plug housing, the return force of the return spring forces the sliding ring to move leftward and reset. The inner wall of the sliding ring forms a sealing fit relationship with the sealing ring for the cavity wall of the female plug housing cavity.

[0013] In yet another specific embodiment of the present invention, a support step for the return spring is formed at the right end of the female plug valve core and at a position corresponding to the right end of the sliding ring return spring. The right end of the sliding ring return spring is supported on the left side surface of the support step of the support step for the return spring. A left side surface mating cavity is formed at the right end of the female plug housing cavity and at a position corresponding to the peripheral edge portion of the support step for the return spring. The peripheral edge portion of the left side surface of the support step mates with the left side surface mating cavity.

[0014] In yet another specific embodiment of the present invention, a snap ring groove is formed along the circumferential direction at the position of the right end port of the female plug housing cavity of the female plug housing. A snap ring for limiting the female plug valve core is embedded in the snap ring groove. The right end face of the female plug valve core contacts the left side surface of the snap ring for limiting the female plug valve core.

[0015] In still another specific embodiment of the present invention, the inner wall of the left end of the fluid pipeline joint is in sealing fit with the fluid pipeline joint sealing ring. An external circlip insertion groove and a pipeline joint sealing ring groove are sequentially formed on the inner wall of the left end of the fluid pipeline joint and at a position on the right side of the fluid pipeline joint sealing ring. A pipeline joint sealing ring for forming a seal with the outer wall of the right end of the female joint housing is arranged in the pipeline joint sealing ring groove. The external circlip is inserted into the external circlip insertion groove. A conical frustum fin is formed on the outer wall of the right end of the fluid pipeline joint, and the right end of the fluid pipeline joint is configured as a straight shape or a ┐ shape. When the right end of the fluid pipeline joint is configured as a ┐ shape, the conical frustum fin is formed on the outer wall of the vertical part of the ┐ shape.

[0016] In still another specific embodiment of the present invention, a male plug housing guiding inclined surface is formed on the cavity wall at the left end of the female plug housing cavity of the female plug housing and surrounds the periphery. The male plug housing locking flange guiding surface and the male plug housing guiding inclined surface form a mutually cooperating guiding relationship.

[0017] The technical effect of the technical solution provided by the present invention is as follows: Since a force is applied to the female plug mechanism in the direction towards the male plug mechanism without the need to use any tools, the two can be automatically and reliably plugged and locked. Also, since the male and female plug locking and unlocking mechanism can be manually shifted towards the female plug mechanism to make the two automatically separate, it is very helpful to reflect the balance and convenience of the operation. Since a set of locking and unlocking rollers is adopted, it is very beneficial to reflect the balanced distribution of the locking force when the male and female plug mechanisms are locked with each other and the balanced distribution of the acting force when unlocking, so as to avoid loosening, vibration and deflection during the locked state caused by inconsistent forces and avoid the problem of being not quick and neat when unlocking. Since when the male and female plug mechanisms need to be separated, as long as the unlocking sliding sleeve is easily shifted, the rationality of the structure can be well reflected. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural diagram of an embodiment of the present invention; Figure 2 is Figure 1 a cross-sectional view of the male plug mechanism shown; Figure 3 is Figure 1 and Figure 2 a three-dimensional structural diagram of the male plug valve core of the male plug mechanism shown; Figure 4 is Figure 1 a cross-sectional view of the female plug mechanism shown; Figure 5 is Figure 4 a three-dimensional structural diagram of the female plug valve core of the female plug mechanism shown; Figure 6 For Figure 1 and Figure 4 the detailed structural diagram of the roller protruding hole shown in Figure 7 is a schematic diagram showing the male and female plugs of the present invention connected to each other and in a use state. Specific embodiments

[0019] In order to more clearly understand the technical essence and beneficial effects of the present invention, a detailed description will be given below in the form of embodiments. However, the descriptions of the embodiments are not limitations on the technical solutions of the present invention. Any equivalent transformation that is merely formal rather than substantial based on the concept of the present invention should be regarded as falling within the scope of the technical solutions of the present invention.

[0020] In the following description, all directional or positional concepts such as up, down, left, right, front, back, inside, and outside are based on the current position state Figure 1 and thus should not be construed as special limitations on the technical solutions provided by the present invention.

[0021] Please refer to Figure 1 , which shows a male plug mechanism 1, a female plug mechanism 2, a male-female plug locking and unlocking mechanism 3, and a fluid pipeline joint 4. The male plug mechanism 1 and the female plug mechanism 2 are corresponding to each other left and right and are inserted and connected to each other or disconnected under the action of the male-female plug locking and unlocking mechanism 3. The male-female plug locking and unlocking mechanism 3 is provided on the aforementioned female plug mechanism 2, and the fluid pipeline joint 4 is connected to one end of the female plug mechanism 2 facing away from the male plug mechanism 1.

[0022] The applicant needs to explain that: the concept of the fluid mentioned above is a liquid medium, and the liquid medium is a liquid cooling medium. The liquid cooling medium in this embodiment is water, but it can also be oil (such as transformer oil, white oil), fluorinated liquid, a mixture of ethylene glycol and water, deionized water, propylene glycol, or liquid nitrogen, etc.

[0023] Technical key points of the technical solution provided by the present invention: The male-female plug locking and unlocking mechanism 3 includes a locking ring 31, a return spring 32, an unlocking sleeve 33, an unlocking sleeve limiting member 34, and a set of locking and unlocking rollers 35. The locking ring 31 is arranged on the female plug mechanism 2 to be displaceable left and right. The return spring 32 is sleeved outside the female plug mechanism 2, and the left end of the return spring 32 abuts against the right side of the locking ring 31, while the right end of the return spring 32 abuts against the female plug mechanism 2. The unlocking sleeve 33 is formed with an unlocking sleeve cavity 331 penetrating from the left end to the right end. The unlocking sleeve 33 is arranged outside the female plug mechanism 2 to be displaceable left and right through the unlocking sleeve cavity 331. At the left end of the unlocking sleeve cavity 331 of the unlocking sleeve 33 and around the circumferential direction of the cavity wall, there is an unlocking sleeve left and right displacement stroke limiting rib 3311 protruding from the cavity wall surface of the unlocking sleeve cavity 331. The left side surface of the locking ring 31 corresponds to the right side surface of the unlocking sleeve left and right displacement stroke limiting rib 3311. That is to say, the locking ring 31 is located between the right side surface of the unlocking sleeve left and right displacement stroke limiting rib 3311 and the left end of the return spring 32. The unlocking sleeve limiting member 34 is embedded on the female plug mechanism 2 at a position to the left of the locking ring 31. The distance between the facing sides of the unlocking sleeve limiting member 34 and the locking ring 31 constitutes an unlocking sleeve left and right displacement stroke limiting rib moving space 36. The foregoing unlocking sleeve left and right displacement stroke limiting rib 3311 is located within the unlocking sleeve left and right displacement stroke limiting rib moving space 36. The number of a set of locking and unlocking rollers 35 is three, which are evenly distributed at intervals around the circumferential direction of the left end of the female plug mechanism 2 and are resisted (also referred to as "relied on" or "supported") by the locking ring 31. When this set of locking and unlocking rollers 35 loses the resistance of the locking ring 31 and penetrates into the interior of the female plug mechanism 2, the male plug mechanism 1 is in a locked state of being plugged and connected to the female plug mechanism 2. When this set of locking and unlocking rollers 35 exits the interior of the female plug mechanism 2 and transfers to between the outside of the female plug mechanism 2 and the cavity wall of the unlocking sleeve cavity 331 of the unlocking sleeve 33 and is resisted by the locking ring 31, the male plug mechanism 1 is in a non-locked state of being disconnected from the female plug mechanism 2.

[0024] The applicant needs to explain that: The penetration of the foregoing set of locking and unlocking rollers 35 into the interior of the female plug mechanism 2 actually means that the middle part of the length direction of the set of locking and unlocking rollers 35 corresponds to the position of the roller protruding hole 2151 opened on the female plug housing 21 and communicating with the female plug housing cavity 211, which will be described in detail below, rather than referring to the whole set of locking and unlocking rollers 35 entering the female plug housing cavity 211 of the female plug housing 21. Similarly, the withdrawal of the foregoing set of locking and unlocking rollers 35 from the interior of the female plug mechanism 2 and the transfer to the outside of the female plug mechanism 2 actually means that the middle part of the length direction of the set of locking and unlocking rollers 35 leaves (withdraws from) the position of the roller protruding hole 2151.

[0025] In this embodiment, the aforementioned unlocking sliding sleeve limiting member 34 is preferably a circlip, but other similar components equivalent to the circlip can also be used.

[0026] On the right side surface of the aforementioned locking ring 31 and at positions corresponding to the aforementioned set of locking and unlocking rollers 35, locking and unlocking roller resisting grooves 311 with the same number as the set of locking and unlocking rollers 35 are formed at intervals, which can also be called locking and unlocking roller relying grooves.

[0027] Please refer to Figure 2 and Figure 3 and in combination with Figure 1 and Figure 7, the aforementioned male plug mechanism 1 includes a male plug housing 11, a male plug valve core return spring 12, a male plug valve core return spring support retaining ring 13, a male plug valve core return spring support retaining ring limiting snap ring 14, and a male plug valve core 15. The male plug housing 11 forms a male plug housing cavity 111 that penetrates from the left end to the right end for fluid passage. On the outer wall of the left end of the male plug housing 11, there is a male plug housing installation and fixing thread 112. On the outer wall of the middle part of the male plug housing 11, there is an external hexagonal nut 113 for cooperation with a wrench for assembling and operating the male plug. On the male plug housing 11 and on the right side of the external hexagonal nut 113, a sealing ring groove construction flange 114 is formed around the circumference of the external hexagonal nut 113. The space between the sealing ring groove construction flange 114 and the opposite side of the external hexagonal nut 113 forms a sealing ring groove 115, and a male-female plug mating sealing ring 1151 is embedded in the sealing ring groove 115. As a preferred solution, a nut left side sealing ring 118 is provided on the left side of the aforementioned external hexagonal nut 113. On the outer wall of the male plug housing 11 and on the right side of the sealing ring groove construction flange 114, a male plug housing locking flange 116 is formed. The space between the male plug housing locking flange 116 and the opposite side of the sealing ring groove construction flange 114 forms a male plug roller locking cavity 117, and a male plug housing locking flange guiding surface 1161 is formed on the male plug housing locking flange 116. The male plug housing locking flange guiding surface 1161 gradually rises from right to left. Due to the fact that the male plug housing locking flange guiding surface 1161 gradually rises from right to left, the shape of the male plug housing locking flange 116 is substantially in the shape of a truncated cone with an outer diameter gradually decreasing from left to right. The male plug valve core return spring 12 is arranged in the aforementioned male plug housing cavity 111. The left end of the male plug valve core return spring 12 is supported on the right side surface of the male plug valve core return spring support retaining ring 13, while the right end of the male plug valve core return spring 12 is supported on a male plug valve core return spring support step 151 formed at the left end of the male plug valve core 15. The male plug valve core return spring support retaining ring 13 is located in the male plug housing cavity 111, and the right side surface of the male plug valve core return spring support retaining ring 13 abuts against a retaining ring support step surface 1111 formed on the cavity wall of the male plug housing cavity 111. The left side surface of the male plug valve core return spring support retaining ring 13 abuts against the right side surface of the male plug valve core return spring support retaining ring limiting snap ring 14, and the male plug valve core return spring support retaining ring limiting snap ring 14 is embedded in a male plug return spring support retaining ring limiting snap ring groove 1112 formed on the cavity wall of the male plug housing cavity 111. The male plug valve core 15 is located at the right end of the male plug housing cavity 111. The right end of the male plug valve core 15 is narrowed, and a male plug valve core sealing ring groove 152 is formed around the circumference of the male plug valve core 15.A male plug valve core sealing ring groove 152 is provided with a male plug valve core sealing ring 1521 for forming a seal with the cavity wall of the male plug housing cavity 111. When the set of locking and unlocking rollers 35 is inserted into the interior of the female plug mechanism 2 and located in the male plug roller locking cavity 117, that is, when the male plug roller locking cavity 117 holds the middle of the length direction of the set of locking and unlocking rollers 35, the male plug housing 11 is in a locked state of plugging connection with the female plug mechanism 2. When the set of locking and unlocking rollers 35 exits the male plug roller locking cavity 117 and transfers to the outside of the female plug mechanism 2 and is located between the outside of the female plug mechanism 2 and the cavity wall of the unlocking sleeve cavity 331 of the unlocking sleeve 33 and is resisted by the lock ring 31, the male plug housing 11 is in an unlocked state of releasing the plugging connection with the female plug mechanism 2. Since the insertion and withdrawal situations have been described above, they will not be repeated here.

[0028] Please refer to Figures 4 to 6 and in combination with Figure 1 and Figure 7, the aforementioned female plug mechanism 2 includes a female plug housing 21, a slip ring return spring 22, a slip ring 23, and a female plug valve core 24. The female plug housing 21 forms a female plug housing cavity 211 that penetrates from the left end to the right end. An unlocking sleeve limiting part embedding groove 212 is provided on the outer wall of the left end of the female plug housing 21 and at a position corresponding to the aforementioned unlocking sleeve limiting part 34. The aforementioned unlocking sleeve limiting part 34 is embedded in the unlocking sleeve limiting part embedding groove 212. A return spring abutting step 213 is formed on the outer wall of the female plug housing 21 and at a position corresponding to the right end of the aforementioned return spring 32. The aforementioned return spring 32 is sleeved on the left end of the female plug housing 21 and is located between the outer wall of the female plug housing 21 and the cavity wall of the unlocking sleeve cavity 331 of the unlocking sleeve. The right end of the return spring 32 abuts against the aforementioned return spring abutting step 213. A female plug housing roller rolling inclined surface 214 with the same number as the aforementioned set of locking and unlocking rollers 35 is formed on the outer wall of the female plug housing 21 and at a position corresponding to the left side of the aforementioned set of locking and unlocking rollers 35 for the aforementioned set of locking and unlocking rollers 35 to roll. A locking and unlocking roller embedding groove 215 is provided at a position corresponding to the left side of the female plug housing roller rolling inclined surface 214. A roller protruding hole 2151 that communicates with the aforementioned female plug housing cavity 211 and has been mentioned above is provided in the middle of the length direction of the locking and unlocking roller embedding groove 215. A fluid pipeline joint matching step 216 is formed on the outer wall of the right end of the female plug housing 21 and around the circumferential direction of the female plug housing 21. The left end face of the aforementioned fluid pipeline joint 4 contacts the step right side surface 2161 of the fluid pipeline joint matching step 216. A fluid pipeline joint sealing ring groove 217 and an outer snap ring groove 218 are successively provided on the outer wall of the female plug housing 21 and on the right side of the fluid pipeline joint matching step 216. A fluid pipeline joint sealing ring 2171 that is hermetically matched with the inner wall of the left end of the fluid pipeline joint 4 is provided in the fluid pipeline joint sealing ring groove 217. An outer snap ring 2181 for clamping with the inner wall of the left end of the fluid pipeline joint 4 is provided in the outer snap ring groove 218. The female plug valve core 24 is located in the female plug housing cavity 211 and is positioned at the right end of the female plug housing cavity 211. The slip ring return spring 22 is located in the female plug housing cavity 211 and is sleeved on the female plug valve core 24. The left end of the slip ring return spring 22 is supported on the right end of the slip ring 23, while the right end of the slip ring return spring 22 is supported on the right end of the female plug valve core 24. The slip ring 23 is arranged to be displaceable left and right in the female plug housing cavity 211; the aforementioned male plug housing 11 is in plug-and-play cooperation with the female plug housing cavity 211.

[0029] From Figures 4 to 5 And Figure 7As shown, the left end portion of the aforementioned female plug valve core 24 can be referred to as the left valve head, and the right end portion can be referred to as the right valve head. The left and right valve heads are connected by a valve head connecting rod 243. The aforementioned left valve head is solid, while the right valve head is hollow.

[0030] From Figure 4 and Figure 6 the illustration of and in combination with the applicant's description above of the insertion and withdrawal of a set of locking and unlocking rollers 35 into and from the female plug mechanism 2, it is thus verified that the so-called insertion means that the middle part of a set of locking and unlocking rollers 35 corresponds to the long roller protruding hole 2151 communicating with the female plug housing cavity 211 as Figure 4 and Figure 6 illustrated, so that it can be caught by the male plug roller locking cavity 117 of the aforementioned male plug, and then the male and female plug housings 11 and 21 are connected to each other (i.e., locked); when leaving, that is, retreating from the roller protruding hole 2151 and being blocked by the lock ring 31, the connection between the male and female plug housings 11 and 21 is released (i.e., unlocking).

[0031] On the cavity wall of the female plug housing cavity 211 of the aforementioned female plug housing 21 and around the circumferential direction of the cavity wall, a sealing ring groove 2111 for the cavity wall of the female plug housing cavity is provided, and a sealing ring 21111 for the cavity wall of the female plug housing cavity is embedded in the sealing ring groove 2111 for the cavity wall of the female plug housing cavity; when the male plug housing 11 of the aforementioned male plug mechanism 1 is in the locked state of being inserted and connected with the female plug housing 21 of the aforementioned female plug mechanism 2, the outer wall of the male plug housing 11 forms a sealing fit relationship with the sealing ring 21111 for the cavity wall of the female plug housing cavity, and when the male plug housing 11 is in the unlocked state of being disconnected from the female plug housing 21 under the action of the rightward displacement of the aforementioned unlocking sliding sleeve 33, the restoring force of the aforementioned return spring 22 forces the aforementioned sliding ring 23 to move leftward and reset, and the outer wall of the sliding ring 23 forms a sealing fit relationship with the sealing ring 21111 for the cavity wall of the female plug housing cavity.

[0032] As a preferred solution, a supplementary sealing ring groove for the cavity wall of the female plug housing can also be provided on the cavity wall of the female plug housing cavity 211 and around the circumferential direction of the cavity wall. The supplementary sealing ring groove for the cavity wall of the female plug housing is located on the left side of the sealing ring groove 2111 for the cavity wall of the female plug housing cavity, and a supplementary sealing ring 2114 for the cavity wall of the female plug housing cavity is embedded in the supplementary sealing ring groove for the cavity wall of the female plug housing. Thus, when the male plug housing 11 is in the locked state of being inserted and connected with the female plug housing 21, the outer wall of the male plug housing 11 can simultaneously form a double - layer, that is, a double - sealing fit relationship with the aforementioned sealing ring 21111 for the cavity wall of the female plug housing cavity and the supplementary sealing ring 2114 for the cavity wall of the female plug housing.

[0033] A female plug valve core seal ring groove 241 is provided in the circumferential direction at the left end of the aforementioned female plug valve core 24. A female plug valve core seal ring 2411 is nested in the female plug valve core seal ring groove 241. When the male plug housing 11 of the aforementioned male plug mechanism 1 is in a non-locked state where it is disengaged from the aforementioned female plug housing 21, the restoring force of the aforementioned return spring 22 forces the aforementioned slip ring 23 to move leftward and reset. The inner wall of the slip ring 23 forms a sealing fit with the aforementioned female plug housing cavity wall seal ring 21111.

[0034] At the right end of the aforementioned female plug valve core 24 and at a position corresponding to the right end of the aforementioned slip ring return spring 22, a return spring support step 242 is formed. The right end of the slip ring return spring 22 is supported on the left side surface 2421 of the support step of the return spring support step 242. At the right end of the aforementioned female plug housing cavity 21 and at a position corresponding to the peripheral edge of the return spring support step 242, a left side surface mating cavity 219 is formed. The peripheral edge of the left side surface 2421 of the support step mates with the left side surface mating cavity 219.

[0035] Please refer to Figure 4 and Figure 7 , at the position of the right end port of the female plug housing cavity 211 of the aforementioned female plug housing 21 and around the circumferential direction, a snap ring groove 2112 is provided. A female plug valve core limiting snap ring 21121 is embedded in the snap ring groove 2112. The right end face of the aforementioned female plug valve core 24 contacts the left side surface of the female plug valve core limiting snap ring 21121.

[0036] The inner wall at the left end of the aforementioned fluid pipeline joint 4 is in sealing fit with the aforementioned fluid pipeline joint seal ring 2171. An outer snap ring insertion groove 41 and a pipeline joint seal ring groove 42 are successively provided on the inner wall at the left end of the fluid pipeline joint 4 and at a position to the right of the aforementioned fluid pipeline joint seal ring 2171. A pipeline joint seal ring 421 for forming a seal with the right end outer wall of the aforementioned female joint housing 21 is provided in the pipeline joint seal ring groove 42. The aforementioned outer snap ring 2181 extends into the outer snap ring insertion groove 41. A conical frustum fin 43 is formed on the outer wall at the right end of the fluid pipeline joint 4, and the right end of the fluid pipeline joint 4 is configured as a straight shape or a ┐ shape. When the right end of the fluid pipeline joint 4 is configured as a ┐ shape, the aforementioned conical frustum fin 43 is formed on the outer wall of the vertical part of the ┐ shape.

[0037] On the cavity wall at the left end of the female plug housing cavity 211 of the aforementioned female plug housing 21 and around the perimeter, a male plug housing guiding inclined surface 2113 is formed. The aforementioned male plug housing locking flange guiding surface 1161 and the male plug housing guiding inclined surface 2113 form a mutually cooperating guiding relationship.

[0038] Please focus on Figure 7 , as shown by Figure 7 the arrow 5 in which indicates the fluid flow condition, and Figure 7 the state shown is that the male and female plug mechanisms 1 and 2 are in a connected and locked state with each other, that is, the male and female plug housings 11 and 21 are in a connected and locked state with each other. In this state, it is communicated from the left cavity opening of the male plug housing cavity 111 to the right end port of the fluid pipeline joint 4.

[0039] In the use state, operate the external hexagonal nut 113 with a tool such as a wrench to mate the male plug housing mounting and fixing nut 112 at the left end of the male plug housing 11 with the threaded interface on the separately provided pipe column, and mate the right end of the fluid pipeline joint 4 with the coolant circulation hose through the conical frustum fins 43 on its outer wall.

[0040] The male and female plug mechanisms 1 and 2 form Figure 7 The connection process shown is as follows: When applying an external force to insert the female plug mechanism 2 in the direction of the male plug mechanism 1, under the guiding cooperation of the above-mentioned male plug housing locking flange guiding surface 1161 and the male plug housing guiding inclined surface 2113 formed on the cavity wall of the female plug housing cavity 211, the male plug housing locking flange guiding surface 1161 pushes a set of locking and unlocking rollers 35 until the male plug housing locking flange 116 smoothly passes through a set of locking and unlocking rollers 35. At this time, a set of locking and unlocking rollers 35 roll along the female plug housing roller rolling inclined surface 214 ( Figure 4 marked) under the action of the return spring 32 and the lock ring 31 and roll into the above-mentioned locking and unlocking roller groove 215, and the middle of the length direction of the locking and unlocking roller 35 corresponds to the above-mentioned roller protruding hole 2151. This state is the applicant's entry into the female plug housing cavity 211 of the female plug housing 21 as described above. Because the long strip-shaped roller protruding hole 2151 is communicated with the female plug housing cavity 211, a set of locking and unlocking rollers 35 are locked in a state with uniform locking force distribution by the above-mentioned male plug roller locking cavity 117, realizing the connection of the male and female plug mechanisms 1 and 2 and presenting Figure 7 the state shown.

[0041] When it is necessary to release the plug-in connection between the male and female plug mechanisms 1 and 2, that is, to release the mutual locking, a force is artificially applied to pull or move the unlocking sliding sleeve 33 to the right. The unlocking sliding sleeve left and right displacement stroke limiting ribs 3311 (also called inner flanges) push the locking ring 31 under the evenly distributed acting force. The locking ring 31 is displaced to the right while overcoming the reaction force of the return spring 32. At this time, a set of locking and unlocking rollers 35 get rid of the control of the locking and unlocking roller resisting groove 311 and slide out of the aforementioned roller protruding hole 2151 along the roller rolling slope 214 of the female plug housing, that is, exit the aforementioned male plug roller locking cavity 117. In the aforementioned state, the male and female joint mechanisms 1 and 2 are separated from each other and can be two independent components respectively.

[0042] In summary, the technical solution provided by the present invention makes up for the deficiencies in the prior art, successfully completes the invention task, and faithfully realizes the technical effects described by the applicant in the technical effect column above.

Claims

1. A self-locking fluid connector structure with a function of uniformly distributing locking and unlocking forces, comprising a male plug mechanism (1), a female plug mechanism (2), a male and female plug locking and unlocking mechanism (3) and a fluid pipeline connector (4), wherein the male plug mechanism (1) and the female plug mechanism (2) correspond to each other on the left and right and are plug-connected or released from plug-connection under the action of the male and female plug locking and unlocking mechanism (3), the male and female plug locking and unlocking mechanism (3) is arranged on the female plug mechanism (2), and the fluid pipeline connector (4) is connected to an end of the female plug mechanism (2) away from the male plug mechanism (1), characterized in that: The male and female plug locking and unlocking mechanism (3) comprises a locking ring (31), a return spring (32), an unlocking sleeve (33), an unlocking sleeve limiting member (34) and a group of locking and unlocking rollers (35). The locking ring (31) is arranged on the female plug mechanism (2) in a left-right displacement manner. The return spring (32) is sleeved outside the female plug mechanism (2). The left end of the return spring (32) abuts against the right side of the locking ring (31), while the right end of the return spring (32) abuts against the female plug mechanism (2). The unlocking sleeve (33) is formed with an unlocking roller extending from the left end to the right end. The unlocking sleeve (33) is disposed outside the female plug mechanism (2) through the unlocking sleeve cavity (331) so as to be displaced left and right. At the left end of the unlocking sleeve cavity (331) of the unlocking sleeve (33) and in the circumferential direction of the cavity wall, an unlocking sleeve left and right displacement stroke limiting rib (3311) is formed which protrudes from the cavity wall surface of the unlocking sleeve cavity (331). The left side surface of the locking ring (31) corresponds to the right side surface of the unlocking sleeve left and right displacement stroke limiting rib (3311). The unlocking sleeve limiting member (34) is located at the locking ring (31 ) is embedded in the female plug mechanism (2) at a position on the left side of the female plug mechanism (2), the distance between the unlocking sleeve limiting member (34) and the opposite side of the locking ring (31) constitutes the unlocking sleeve left and right displacement stroke limiting rib movement space (36), the unlocking sleeve left and right displacement stroke limiting rib (3311) is located in the unlocking sleeve left and right displacement stroke limiting rib movement space (36), a group of locking and unlocking rollers (35) has three numbers uniformly distributed in a circumferential state around the left end of the female plug mechanism (2) and blocked by the locking ring (31), when the group When the locking and unlocking rollers (35) lose the resistance of the locking ring (31) and penetrate into the interior of the female plug mechanism (2), the male plug mechanism (1) is in a locked state of plug-in connection with the female plug mechanism (2); and when the group of locking and unlocking rollers (35) withdraw from the interior of the female plug mechanism (2) and move to the outside of the female plug mechanism (2) and between the wall of the unlocking sleeve cavity (331) of the unlocking sleeve (33) and are resisted by the locking ring (31), the male plug mechanism (1) is in a non-locked state of releasing the plug-in connection with the female plug mechanism (2).

2. The self-locking fluid joint structure with uniform distribution of locking force and unlocking force according to claim 1, characterized in that: On the right side surface of the lock ring (31) and at positions corresponding to the group of lock and unlock rollers (35), lock and unlock roller abutment grooves (311) having the same number as the group of lock and unlock rollers (35) are formed in an interval state.

3. The self-locking fluid joint structure with uniform distribution of locking force and unlocking force according to claim 1, characterized in that: The male plug mechanism (1) comprises a male plug housing (11), a male plug valve core reset spring (12), a male plug valve core reset spring support retaining ring (13), a male plug valve core reset spring support retaining ring limiting retaining ring (14) and a male plug valve core (15); the male plug housing (11) is formed with a male plug housing cavity (111) extending from the left end to the right end for fluid to pass through; a male plug housing mounting fixing thread (112) is formed on the left end outer wall of the male plug housing (11); an external hexagonal nut (113) for fitting with a wrench for male plug assembly operation is formed on the middle outer wall of the male plug housing (11); and a male plug housing (111) is provided on the male plug housing (11) and on the right side of the external hexagonal nut (113). A sealing ring embedding groove forming flange (114) is formed around the circumferential direction of the external hexagonal nut (113), the space between the sealing ring embedding groove forming flange (114) and the opposite side of the external hexagonal nut (113) forms a sealing ring embedding groove (115), and a male and female plug matching sealing ring (1151) is embedded in the sealing ring embedding groove (115), a male plug housing locking flange (116) is formed on the outer wall of the male plug housing (11) and located on the right side of the sealing ring embedding groove forming flange (114), the space between the male plug housing locking flange (116) and the opposite side of the sealing ring embedding groove forming flange (114) forms a male plug roller locking cavity (117), and in the male plug housing locking cavity (117), a male plug roller locking cavity (117) is formed. A male plug housing locking flange guide surface (1161) is formed on the flange (116), and the male plug housing locking flange guide surface (1161) gradually rises from right to left. The male plug valve core reset spring (12) is arranged in the male plug housing cavity (111), and the left end of the male plug valve core reset spring (12) is supported on the right side surface of the male plug valve core reset spring support retaining ring (13), and the right end of the male plug valve core reset spring (12) is supported on the male plug valve core reset spring support step (151) formed on the left end of the male plug valve core (15), the male plug valve core reset spring support retaining ring (13) is located in the male plug housing cavity (111), and the male plug valve core reset spring support retaining ring (13) is supported on the right side surface of the male plug valve core reset spring support retaining ring (13). The right side surface of the male plug valve core (15) is in contact with the retaining ring supporting step surface (1111) formed on the cavity wall of the male plug housing cavity (111), and the left side surface of the male plug valve core return spring support retaining ring (13) is in contact with the right side surface of the male plug valve core return spring support retaining ring limiting retaining ring (14), and the male plug valve core return spring support retaining ring limiting retaining ring (14) is embedded in the male plug return spring support retaining ring limiting retaining ring groove (1112) formed on the cavity wall of the male plug housing cavity (111), the male plug valve core (15) is located at the right end of the male plug housing cavity (111), and a male plug valve core sealing ring groove (152) is formed at the right end of the male plug valve core (15) and around the male plug valve core (15) in the circumferential direction.A male plug valve core sealing ring (1521) is arranged in the male plug valve core sealing ring groove (152) for forming a seal with the cavity wall of the male plug housing cavity (111). When the group of locking and unlocking rollers (35) are inserted into the interior of the female plug mechanism (2) and located in the male plug roller locking cavity (117), the male plug housing (11) is in a locked state of plug-in connection with the female plug mechanism (2). When the group of locking and unlocking rollers (35) are withdrawn from the male plug roller locking cavity (117) and transferred to the outside of the female plug mechanism (2) and located between the outside of the female plug mechanism (2) and the cavity wall of the unlocking sleeve cavity (331) of the unlocking sleeve (33) and blocked by the locking ring (31), the male plug housing (11) is in a non-locked state of releasing the plug-in connection with the female plug mechanism (2).

4. The self-locking fluid joint structure with uniform distribution of locking force and unlocking force according to claim 3, characterized in that: The female plug mechanism (2) comprises a female plug housing (21), a slip ring return spring (22), a slip ring (23) and a female plug valve core (24); the female plug housing (21) is provided with a female plug housing cavity (211) extending from the left end to the right end; an unlocking sleeve limiter embedding groove (212) is provided on the left end outer wall of the female plug housing (21) and at a position corresponding to the unlocking sleeve limiter (34); the unlocking sleeve limiter (34) is embedded in the unlocking sleeve limiter embedding groove (212); a return spring abutting step (213) is provided on the outer wall of the female plug housing (21) and at a position corresponding to the right end of the return spring (32); the return spring (32) is sleeved on the female plug housing ( The left end of the female plug housing (21) is located between the outer wall of the female plug housing (21) and the unlocking sleeve cavity wall of the unlocking sleeve cavity (331), the right end of the reset spring (32) abuts against the reset spring abutting step (213), and on the outer wall of the female plug housing (21) and at a position corresponding to the left side of the group of locking and unlocking rollers (35), there are formed female plug housing roller rolling inclined surfaces (214) equal in number to the group of locking and unlocking rollers (35) for the group of locking and unlocking rollers (35) to roll, and a locking and unlocking roller embedding groove (215) is provided at a position corresponding to the left side of the female plug housing roller rolling inclined surface (214), and a locking and unlocking roller embedding groove (215) is provided in the middle of the length direction of the locking and unlocking roller embedding groove (215). A roller protrusion hole (2151) communicates with the female plug housing cavity (211); a fluid pipeline joint matching step (216) is formed on the right end outer wall of the female plug housing (21) and around the circumferential direction of the female plug housing (21); the left end face of the fluid pipeline joint (4) contacts the right side face (2161) of the fluid pipeline joint matching step (216); a fluid pipeline joint sealing ring groove (217) and an external retaining ring groove (218) are sequentially provided on the outer wall of the female plug housing (21) and located on the right side of the fluid pipeline joint matching step (216); a fluid pipeline joint sealing ring groove (217) is provided in the fluid pipeline joint sealing ring groove (217) and is sealed with the left end inner wall of the fluid pipeline joint (4). A ring (2171) is provided in the outer retaining ring groove (218) for retaining with the inner wall of the left end of the fluid pipeline connector (4); the female plug valve core (24) is located in the female plug housing cavity (211) and is positioned at the right end of the female plug housing cavity (211); the slip ring return spring (22) is located in the female plug housing cavity (211) and is sleeved on the female plug valve core (24); the left end of the slip ring return spring (22) is supported on the right end of the slip ring (23), and the right end of the slip ring return spring (22) is supported on the right end of the female plug valve core (24); the slip ring (23) is arranged in the female plug housing cavity (211) with left and right displacement; the male plug housing (11) and the female plug housing cavity (211) are plug-in-pull fit.

5. The self-locking fluid joint structure with uniform distribution of locking force and unlocking force according to claim 4, characterized in that: A female plug housing cavity wall sealing ring groove (2111) is provided on the cavity wall of the female plug housing cavity (211) of the female plug housing (21) and in the circumferential direction around the cavity wall, and a female plug housing cavity wall sealing ring (21111) is embedded in the female plug housing cavity wall sealing ring groove (2111); when the male plug housing (11) of the male plug mechanism (1) is in a locked state of plug-connection with the female plug housing (21) of the female plug mechanism (2), the male plug housing (21111) The outer wall of the slip ring (11) forms a sealing fit with the sealing ring (21111) of the cavity wall of the female plug housing, and when the unlocking sleeve (33) is displaced to the right and the male plug housing (11) is in a non-locking state in which the plug connection with the female plug housing (21) is released, the restoring force of the reset spring (22) forces the slip ring (23) to move to the left and reset, and the outer wall of the slip ring (23) forms a sealing fit with the sealing ring (21111) of the cavity wall of the female plug housing.

6. The self-locking fluid joint structure with uniform distribution of locking force and unlocking force according to claim 4, characterized in that: A female plug valve core sealing ring groove (241) is provided in the circumferential direction of the left end of the female plug valve core (24), and a female plug valve core sealing ring (2411) is nested in the female plug valve core sealing ring groove (241). When the male plug housing (11) of the male plug mechanism (1) is in a non-locked state in which the plug connection with the female plug housing (21) is released, the restoring force of the reset spring (22) forces the slip ring (23) to move to the left and reset, and the inner wall of the slip ring (23) forms a sealing fitting relationship with the sealing ring (21111) of the cavity wall of the female plug housing.

7. The self-locking fluid joint structure with uniform distribution of locking force and unlocking force according to claim 4, characterized in that: A return spring supporting step (242) is formed at the right end of the female plug valve core (24) and at a position corresponding to the right end of the slip ring return spring (22); the right end of the slip ring return spring (22) is supported on the left side surface (2421) of the return spring supporting step (242); a step left side matching cavity (219) is formed at the right end of the female plug housing cavity (21) and at a position corresponding to the surrounding edge portion of the return spring supporting step (242); the surrounding edge portions of the left side surface (2421) of the supporting step match the step left side matching cavity (219).

8. The self-locking fluid joint structure with uniform distribution of locking force and unlocking force according to claim 4, characterized in that: A retaining spring groove (2112) is provided at the right end port of the female plug housing cavity (211) of the female plug housing (21) and around the circumferential direction, and a female plug valve core limiting retaining spring (21121) is embedded in the retaining spring groove (2112), and the right end face of the female plug valve core (24) contacts the left side face of the female plug valve core limiting retaining spring (21121).

9. The self-locking fluid joint structure with uniform distribution of locking force and unlocking force according to claim 4, characterized in that: The inner wall at the left end of the fluid pipeline joint (4) is in sealing cooperation with the fluid pipeline joint sealing ring (2171), and an external retaining ring insertion groove (41) and a pipeline joint sealing ring groove (42) are sequentially provided on the inner wall at the left end of the fluid pipeline joint (4) and at a position located to the right of the fluid pipeline joint sealing ring (2171), and a pipe joint sealing ring groove (42) is provided in the pipe joint sealing ring groove (42) for engaging with the female joint housing (21). The outer wall of the right end forms a sealed pipeline joint sealing ring (421), the outer retaining ring (2181) is inserted into the outer retaining ring insertion groove (41), and a truncated cone wing (43) is formed on the outer wall of the right end of the fluid pipeline joint (4), and the right end of the fluid pipeline joint (4) is formed in a straight line shape or a ┐ shape. When the right end of the fluid pipeline joint (4) is formed in a ┐ shape, the truncated cone wing (43) is formed on the outer wall of the vertical part of the ┐ shape.

10. The self-locking fluid joint structure with uniform distribution of locking force and unlocking force according to claim 6, characterized in that: A male plug housing guide slope (2113) is formed on the cavity wall at the left end of the female plug housing cavity (211) of the female plug housing (21) and around the cavity wall, and the male plug housing locking flange guide surface (1161) forms a mutually matching guiding relationship with the male plug housing guide slope (2113).

Images