CN112555471A

CN112555471A - Pressure relief valve for protecting blind-mate fluid connector socket

Info

Publication number: CN112555471A
Application number: CN202011312650.1A
Authority: CN
Inventors: 赵文生; 冯静; 李龙; 陆幸骏; 沈彤; 张剑冰
Original assignee: Yangzhou Institute Of Marine Electronic Instruments No723 Institute Of China Shipbuilding Industry Corp
Current assignee: Yangzhou Institute Of Marine Electronic Instruments No723 Institute Of China Shipbuilding Industry Corp
Priority date: 2020-11-20
Filing date: 2020-11-20
Publication date: 2021-03-26
Anticipated expiration: 2040-11-20
Also published as: CN112555471B

Abstract

The invention provides a pressure relief valve for protecting a blind-mate fluid connector socket, which comprises a shell, a piston, a spring, a check ring and a sealing ring, wherein the diameters of inner cavities of the shell are different, the piston is arranged in the shell, the spring is arranged between the shell and the piston, the sealing ring is arranged on the inner wall of the piston, the piston moves along an axis in the shell under the action of the pressure, the atmospheric pressure, the spring force and the friction force in a cooling module, when the piston moves at a part with a small diameter of the inner cavity of the shell, the air tightness between the shell and the piston is ensured through the check ring, when the piston moves to a part with a large diameter of the inner cavity of the shell, a gap is formed between the outer wall of the piston and the shell, and air is introduced into the pressure relief valve and a fluid channel in the cooling module communicated with the pressure. The invention can prolong the service life of the sealing ring and the fluid connector socket and improve the reliability and the safety of the fluid connector.

Description

Pressure relief valve for protecting blind-mate fluid connector socket

Technical Field

The invention relates to a pressure relief valve, in particular to a pressure relief valve for protecting a blind-mate fluid connector socket.

Background

Blind mate fluid connectors, as a means of connection and transfer between liquid cooling systems, are typically comprised of two parts, a receptacle mounted on a cooling module and a plug mounted on the base of a cooling circuit of a rack or enclosure (see fig. 1). The socket and the plug need to achieve good sealing effect in the connection, disconnection and connection states, and the normal work of the liquid cooling system can be guaranteed.

When the blind-mate fluid connector is disconnected, especially when the valve is normally flowed and is not closed to fluid and the valve is disconnected under pressure, the inside relatively large negative pressure that can produce of cooling module, the negative pressure can lead to the socket (the last asynchronous installation relief valve of cooling module) to seal the head and reset completely and produce the delay, through the complete reset time of some model blind-mate fluid connector socket seal head after the fluid connector disconnection of field test be 4 ~ 5 minutes. At the moment of disconnection of the fluid connector, the socket sealing head is not in a complete reset state, and the O-shaped sealing ring is clearly seen from the figure, so that certain axial shearing force can be generated on the O-shaped sealing ring of the socket by the sealing head, and the service life of the O-shaped sealing ring can be reduced by plugging and unplugging the O-shaped sealing ring for many times.

Disclosure of Invention

The invention aims to provide a pressure relief valve for protecting a blind-mate fluid connector socket.

The technical solution for realizing the purpose of the invention is as follows: a pressure relief valve for blind mate fluid connector socket protection, includes casing, piston, spring, retaining ring, second sealing washer, wherein:

the casing inner chamber diameter is different, the piston sets up inside the casing, the spring sets up between casing and piston, the second sealing washer sets up on the piston inner wall, along with the difference of fluid coupling plug and socket separation degree, the piston is at cooling module internal pressure, atmospheric pressure, the spring force, under the effect of friction, move along the axis inside the casing, when the piston moves at the little position of casing inner chamber diameter, the gas tightness between casing and the piston has been guaranteed to the second sealing washer, when the piston moves the big position of casing inner chamber diameter, appear the space between piston outer wall and the casing, the air gets into the inside fluid passage of cooling module that relief valve and be linked together from the space, can reduce inside negative pressure, ensure that fluid coupling socket seals the head and in time resets.

Further, the inner wall of the shell is provided with a check ring, the outer wall of the piston is provided with a chamfer, and the piston and the spring are assembled inside the shell in a matching manner, so that the moving range of the piston is limited.

Further, the first sealing ring is arranged at the joint of the shell and the cooling module, and the air tightness between the pressure relief valve and the cooling module is guaranteed.

Furthermore, the first sealing ring and the second sealing ring are O-shaped sealing rings, and annular grooves are formed in the shell and the piston and used for installing the O-shaped sealing rings.

Furthermore, a blind counter bore is arranged in the piston and used for guaranteeing the storage space of the spring after the spring is completely compressed and ensuring the spring to be guided and stably compressed along the axis.

A method for protecting a blind-mate fluid connector socket comprises the following steps of in the disconnection process of a fluid connector, based on the pressure relief valve, protecting the blind-mate fluid connector socket:

1) process 1: when the fluid flow in the plug and the socket of the fluid connector is completely stopped, the plug and the socket are still in a contact state, the pressure intensity in the flow channel of the cooling module is gradually changed from positive pressure to negative pressure along with the increase of the separation degree of the plug and the socket, when the negative pressure reaches a certain value, the pressure relief valve piston is in a moving critical state, and at the moment, a retainer ring of the pressure relief valve is in contact with a chamfer;

2) and (2) a process: along with the further increase of the separation degree of the plug and the socket, the negative pressure in the cooling module is further increased, the pressure relief valve piston starts to move the compression spring from a moving critical state, the pressure relief valve piston moves at the part with the small diameter of the inner cavity of the shell, the air tightness between the shell and the piston is ensured by the second sealing ring, and at the moment, external air does not enter the pressure relief valve;

3) and 3, process: along with the further increase of the separation degree of the plug and the socket, the negative pressure in the cooling module is further increased, the pressure relief valve piston moves from a place with a small diameter of the inner cavity of the shell to a place with a large diameter of the inner cavity, at the moment, the second sealing ring on the piston is changed from a sealing state to an air leakage state, and external air enters the flow channel of the cooling module through the pressure relief valve;

4) and 4, process: when external air enters the cooling module flow channel through the pressure relief valve and reaches a certain degree, the internal pressure of the cooling module flow channel is reduced to the extent that the internal pressure is not enough to offset the elastic force of the resultant force formed by the pressure difference and the friction force of the internal atmosphere and the external atmosphere against the piston, the piston moves to be reset to the sealing state isolated from the external atmosphere, and the protection of the blind-plugging fluid connector socket is completed.

Compared with the prior art, the invention has the following remarkable advantages: the problem of cooling module go up the blind-mate fluid connector socket life of non-synchronous installation pressure relief valve is limited is solved, prevented that socket inside seal head from to O type sealing washer axial shear force's production, prolonged the life of O type sealing washer and fluid connector socket, improved fluid connector reliability and security to pressure relief valve simple structure, the reliability is high.

Drawings

Fig. 1 is a schematic view of the assembly and connection of a cooling module, a cooling line, a fluid connector, and a pressure relief valve.

Fig. 2 is a schematic assembled view of a relief valve assembly.

Fig. 3 is a schematic view of a relief valve piston in a critical state with open external air.

Fig. 4 is a schematic view of the relief valve in an outside air inlet state.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

Combine fig. 2, pressure relief valve comprises casing 1, piston 2, spring 3, retaining ring 4, first sealing washer 5, second sealing washer 6, and piston 2, spring 3 are inside through retaining ring 4 equipment to casing 1. 1 inner chamber diameter variation in size of casing, the relief valve mainly is through 1 inner chamber diameter variation in size of casing, introduces the air admission relief valve and the inside fluid passage of cooling module that is linked together, reduces inside negative pressure, and then ensures that the sealed head of fluid coupling socket in time resets. An O-shaped sealing ring is arranged on the piston 2 in an annular groove, and a certain chamfer is arranged at the right end of the piston 2 and used for preventing the interference of the check ring 4 on the movement reset of the piston 2 when the piston 2 moves leftwards and then moves rightwards to reset. The piston 2 is internally provided with a blind counter bore which is used for storing space after the spring is completely compressed and ensuring the spring to be stably compressed along the axis direction. An O-shaped sealing ring is arranged on the shell 1 in an annular groove.

In the disconnection process of the fluid connector, positive pressure greater than external atmospheric pressure inside a cooling module flow channel is converted into negative pressure less than external atmospheric pressure, due to the main effect of the negative pressure inside the cooling module flow channel, a piston 2 moves leftwards along an axis in a shell 1, a connecting channel with external air is opened, air enters the inside of the cooling module flow channel, negative pressure inside the cooling module flow channel is reduced, the instant disconnection of the fluid connector is ensured, a socket sealing head synchronously and completely resets, the generation of axial shearing force of an O-shaped sealing ring arranged in a fluid connector socket by the socket sealing head is prevented, the service lives of the O-shaped sealing ring and the fluid connector socket are prolonged, and the reliability and the safety of the fluid connector are improved. At fluid connector disconnection in-process, the pressure relief valve is according to different disconnection degree, is three kinds of different gestures, 4 kinds of processes.

1) The relief valve is the posture process 1 of fig. 2: when the fluid connector plug, the inside fluid flow of socket suspend completely, plug, socket still are in the contact state, along with plug, the increase of socket separation degree, the inside pressure of cooling module runner is gradually become the negative pressure by the malleation, when the negative pressure reaches a definite value, pressure relief valve piston [2] is in and removes critical state, and pressure relief valve still is the gesture of fig. 2 this moment.

2) The relief valve is the posture process 2 of fig. 3: combine fig. 3, along with plug, socket separation degree's further increase, the inside negative pressure of cooling module also further increases, pressure relief valve piston [2] by being in the critical state that removes left, remove to fig. 3 state, pressure relief valve piston [2] upper seal circle 2[6] be in with the outside air open critical state, outside air does not get into pressure relief valve this moment.

3) Relief valve is fig. 4 gesture process 3: combine fig. 4, along with plug, socket separation degree's further increase, the inside negative pressure of cooling module also further increases, pressure relief valve piston [2] by casing [1] the place that the inner chamber diameter is little remove to the place that the inner chamber diameter is big, O type sealing washer [6] becomes the gas leakage state by encapsulated situation on piston [2] this moment, outside air gets into inside the cooling module runner through pressure relief valve.

4) Relief valve recovers gesture process 4: with reference to fig. 2 and 3, the relief valve recovers the process: when outside air gets into the inside certain degree that reaches of cooling module runner through pressure relief valve, inside pressure of cooling module runner reduces to and is not enough to offset in, outside atmospheric pressure difference, when the resultant force that friction formed confronts spring [3] to piston [2] elasticity, piston [2] will remove right, pressure relief valve recovers to the state between 3 and the 2 gestures of figure, cooling module runner inside pressure still is less than outside atmospheric pressure this moment, inside and the outside isolated state that is in of cooling module runner, but compare with the cooling module equivalent state that does not install pressure relief valve, the inside negative pressure of cooling module runner has reduced to and has been not enough to influence the socket and be in the final position state of totally enclosed under the promotion of inside spring.

When the actual process is observed, blind-mating fluid connector socket and plug when breaking off completely, the sealed head of the socket installed on the cooling module resets in step completely, does not produce the delay phenomenon, has prevented the sealed head from producing to the built-in O type sealing washer axial shear force of fluid connector socket, has prolonged the life of O type sealing washer and fluid connector socket, and whole in-process, breaks the pressure valve and does not have liquid to flow out, has improved fluid connector reliability and security.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A pressure relief valve for blind mate fluid connector socket protection, its characterized in that includes casing (1), piston (2), spring (3), retaining ring (4), second sealing washer (6), wherein:

the diameter of the inner cavity of the shell (1) is different, the piston (2) is arranged inside the shell (1), the spring (3) is arranged between the shell (1) and the piston (2), the second sealing ring (6) is arranged on the inner wall of the piston (2), along with the difference of the separation degree of a plug and a socket of a fluid connector, the piston (2) moves along the axis inside the shell under the action of the pressure inside the cooling module, the atmospheric pressure, the spring force and the friction force, when the piston (2) moves at the part with the small diameter of the inner cavity of the shell (1), the second sealing ring (6) ensures the air tightness between the shell (1) and the piston (2), when the piston (2) moves to the part with the large diameter of the inner cavity of the shell (1), a gap appears between the outer wall of the piston (2) and the shell (1), and air enters the pressure relief valve and the fluid channel inside the cooling module communicated with, the internal negative pressure can be reduced, and the fluid connector socket sealing head can be ensured to be timely reset.

2. The pressure relief valve for blind mate fluid connector receptacle protection of claim 1, wherein said housing (1) inner wall is provided with a retainer ring (4), said piston (2) outer wall is provided with a chamfer, the fit is with piston (2), spring (3) assembled inside housing (1) to limit the range of movement of piston (2).

3. The pressure relief valve for blind mate fluid connector socket protection of claim 1 wherein, casing (1) and cooling module junction set up first sealing washer (5) for guarantee the gas tightness that pressure relief valve and cooling module are connected.

4. The relief valve for blind mate fluid connector receptacle protection of claim 3, wherein said first seal ring (5), second seal ring (6) are O-ring seals, said housing (1) and piston (2) being provided with annular grooves for installation of the O-ring seals.

5. The pressure relief valve for blind mate fluid connector receptacle protection of claim 1, characterized in that piston (2) is internally provided with an blind counterbore for ensuring storage space after the spring is fully compressed and ensuring stable compression of the spring along the axis direction.

6. The method for protecting the blind-mate fluid connector socket is characterized in that in the process of disconnecting the fluid connector, the method is based on the pressure relief valve for protecting the blind-mate fluid connector socket of any one of claims 1 to 5, and the method specifically works as follows:

1) process 1: when the fluid flow in the plug and the socket of the fluid connector is completely stopped, the plug and the socket are still in a contact state, the pressure intensity in the flow channel of the cooling module is gradually changed from positive pressure to negative pressure along with the increase of the separation degree of the plug and the socket, when the negative pressure reaches a certain value, the pressure relief valve piston is in a moving critical state, and at the moment, a retainer ring (4) of the pressure relief valve is in contact with a chamfer;

2) and (2) a process: along with the further increase of the separation degree of the plug and the socket, the negative pressure in the cooling module is further increased, the pressure relief valve piston (2) starts to move the compression spring from a moving critical state, the pressure relief valve piston (2) moves at the part with the small diameter of the inner cavity of the shell (1), the second sealing ring (6) ensures the air tightness between the shell (1) and the piston (2), and at the moment, external air does not enter the pressure relief valve;

3) and 3, process: along with the further increase of the separation degree of the plug and the socket, the negative pressure in the cooling module is further increased, the pressure relief valve piston (2) moves from a place with a small inner cavity diameter of the shell (1) to a place with a large inner cavity diameter, at the moment, the second sealing ring (6) on the piston (2) is changed into an air leakage state from a sealing state, and external air enters the inside of a cooling module flow channel through the pressure relief valve;

4) and 4, process: when outside air enters the cooling module runner through the pressure relief valve and reaches a certain degree, the pressure inside the cooling module runner is reduced to the extent that the pressure inside the cooling module runner is not enough to offset the elastic force of the resultant force resisting spring (3) to the piston (2) formed by the pressure difference and the friction force of the inside and the outside atmosphere, and the piston (2) is moved to be reset to the sealing state isolated from the outside atmosphere, so that the protection of the blind-mate fluid connector socket is completed.