CN204785218U - Heavy -calibre maintenance liquid way in orbit breaking of contact ware - Google Patents

Abstract

The utility model discloses a heavy -calibre maintenance liquid way in orbit breaking of contact ware, including plug and socket, both adopt screw thread connection, and the socket sealing washer adopts the twice sealing washer simultaneously, and the radial sealing technique of this multichannel has solved the self sealss key technology that the product " did not even admit air, did not unload not dropping liquid ", and separation dropping liquid and butt joint air input all do not arrive 0.1ml. The sealing washer adopts the sealing member to vulcanize the technique, guarantees the product area and presses the sealing washer of butt joint in -process socket casing not come off under the pressure effect, guarantees the product and slides in state the sealing member of core subassembly to the carried forward high pressure and do not come off.

Description

A Large Diameter On-orbit Maintenance Hydraulic Circuit Breaker

technical field

The utility model relates to a space hydraulic pipeline joint, in particular to a large-diameter on-orbit maintenance hydraulic circuit breaker.

Background technique

In order to meet the requirements of long-term on-orbit safe and reliable operation, the space station must have on-orbit maintenance capabilities. The basic strategy for the maintenance of the liquid pipelines of each subsystem in the space station cabin is to find faulty equipment, switch the function of the faulty equipment to the backup equipment, and remove the faulty equipment. device, replace a failed device with a spare device, initiate a replacement spare device. When performing maintainability operations on equipment, in addition to meeting the requirements of astronauts' accessibility and operational convenience, the implementation of equipment maintainability technology must also be supported by the system's fault isolation function. At the same time, there must be the support of the system plug and play function. Among them, in terms of hardware, hydraulic circuit breakers that are easy to operate on rails are mainly used. Astronauts carry out equipment maintenance operations while wearing spacesuits. The plugging and pulling operations of on-orbit maintenance fluid circuit breakers need to meet the characteristics of flexibility, simplicity, and reliable and convenient locking and unlocking.

The existing liquid circuit breaker is generally composed of a female joint and a male joint. The male joint is equipped with a movable valve core. Under the action of the spring, when the female and male joints are disconnected, the oil circuit is automatically closed; the female joint is fixed by a It is composed of spool, ferrule, top sleeve, movable sleeve and steel ball. Under the action of artificial force, the ferrule can connect and separate male and female joints. When docking under pressure, it is easy to have the phenomenon of seal falling off and failure, and the reliability is low, which does not meet the high reliability requirements of the orbital maintenance of the space station; Meet the ergonomic requirements of astronauts operating in orbit.

Utility model content

In view of this, the utility model provides a large-diameter on-orbit maintenance liquid circuit breaker, which can prevent dripping and air leakage during docking and disengagement. At the same time, the threaded connection plug and socket are used to make it easy for astronauts to operate .

A liquid circuit breaker for on-rail maintenance, including a plug and a socket, the plug includes a plug housing, a sealing sliding core, a fixed sliding core, and a plug spring; the fixed sliding core is located inside the plug housing and fixed; the sealing sliding core is The circle fits with the inner circle of the plug housing, and a plug sealing ring is arranged between the two; a plug spring is arranged between one end of the sealing sliding core and the bottom of the plug housing, and under the action of the plug spring, the other end of the sealing sliding core and the fixed sliding A ring of protrusions at the front end of the core interferes to realize the sealing of the plug oil circuit; the socket includes a socket housing, a socket sliding core rod, a fixing seat, a sliding core cap and a socket spring; the socket sliding core rod can be placed in the fixing seat Sliding, the front end of the sliding core rod of the socket fixes the sliding core cap, and the socket spring is arranged between the rear end of the sliding core cap and the socket housing; the outer circle of the sliding core cap and the inner circle of the socket housing cooperate with each other, and a socket is arranged between the two The sealing ring realizes the sealing of the socket) oil circuit; the socket sealing ring includes two sealing rings.

Preferably, the sealing ring located at the end of the socket in the socket sealing ring is processed by vulcanization sealing process.

Preferably, the specific structure of the sealing ring located at the end of the socket is as follows: a groove is processed on the inner circumference of the socket housing, a seal is vulcanized in the groove, and there is a protrusion with a radius of 0.5mm in the middle of the seal. The height of the boss is slightly higher than the end face of the groove.

Preferably, the outer circle of the front end of the plug housing is fitted with a nut, and the end of the nut is provided with a limit screw to prevent it from protruding from the front end of the plug housing; The internal thread of the nut mates with the external thread.

Preferably, both the internal thread of the nut and the external thread of the threaded sleeve adopt trapezoidal threads.

Preferably, the external thread of the threaded sleeve is treated with hard anodic oxidation, and the internal thread of the nut is treated with low temperature oxidation.

Preferably, the front end of the plug housing is higher than the front end of the fixed sliding core, and there is a gap between the socket housing and the threaded sleeve to form a guide groove that can cooperate with the outer peripheral surface of the plug housing.

Preferably, guide keys are processed on the outer peripheral surface of the front end of the plug housing, and corresponding key grooves are processed on the inner peripheral surface of the guide groove of the socket housing.

The utility model has the following beneficial effects:

1) The liquid circuit breaker of this utility model uses multi-channel radial sealing technology to solve the key self-sealing technology of the product "no air intake, no dripping when unloading", and the amount of separated dripping liquid and docking air intake is less than 0.1ml. The seal ring adopts seal vulcanization technology to ensure that the seal ring of the socket housing does not fall off under pressure during the product docking process, and to ensure that the seal of the sliding core component does not fall off under high pressure after the product is docked.

2) The plug and socket of the utility model are connected by thread, and the torque of the thread connection overcomes the spring force in the two components and the liquid pressure in the pipeline, so that the astronaut can realize the oil circuit docking with a relatively small force, which is easy operate.

3) The front end of the socket housing is designed to be higher than the fixed sliding core, and the front end of the socket housing can play the role of alignment and guidance, which is convenient for the docking operation of the astronauts.

4) Through the design of the keyway and guide key at both ends of the plug and socket, when the product is docked and separated, the components at both ends can be connected in-line, which avoids the rotation of the plug component and the rotation of the sealing sliding core during the docking. Reduce the reliability of on-orbit maintenance pipeline seals.

Description of drawings

Fig. 1 is a schematic structural diagram of the disconnected state of the hydraulic circuit breaker of the present invention.

Fig. 2a, Fig. 2b and Fig. 2c are process diagrams of the liquid circuit breaker of the present invention from the disconnected state to the connected state.

Among them, 1-plug, 2-socket, 11-plug interface, 12-plug shell, 13-plug spring, 14-plug sealing ring, 15-gasket, 16-seal sliding core, 17-limit screw, 18 -fixed sliding core, 19-nut, 110-guide key, 21-socket housing, 22-socket sealing ring, 23-sliding core cap, 24-socket sliding core rod, 25-socket spring, 26-thread, 27- Fixing seat, 28-guiding groove, 29-socket interface.

Detailed ways

The utility model will be described in detail below in conjunction with the accompanying drawings and examples.

As shown in FIG. 1 , the hydraulic circuit breaker of the present invention is composed of a plug 1 and a socket 2 , wherein the plug 1 includes a plug housing 12 , a sealing sliding core 16 , a fixed sliding core 18 , and a plug spring 13 . The end of the fixed sliding core 18 is fixed on the bottom of the plug housing 12 , and the front end of the fixed sliding core 18 is a joint connected with the socket 2 . The sealing sliding core 16 is placed in the space between the plug housing 12 and the fixed sliding core 18, the outer circle of the sealing sliding core 16 matches the inner circle of the plug housing 12, and a sealing ring is installed on the outer wall of the sealing sliding core 16 A plug spring 13 is arranged between the end of the sealing sliding core 16 and the bottom of the plug housing 12, and under the action of the plug spring 13, the front end of the sealing sliding core 16 conflicts with a circle of protrusions at the front end of the fixed sliding core 18.

The socket 2 includes a socket housing 21 , a socket slide rod 24 , a fixing seat 27 , a slide cap 23 , a socket spring 25 and the like. The socket sliding core rod 24 can slide in the fixed seat 27, and the front end of the socket sliding core rod 24 fixes the sliding core cap 23, and the outer circle of the sliding core cap 23 cooperates with the inner circle of the socket housing 21, and a seal is arranged between the two. ring; the front end of the sliding core cap 23 and the front end of the fixed sliding core 18 of the plug 1 are in contact with each other; the rear end of the sliding core cap 23 and the socket housing 21 are provided with a socket spring 25 .

The use environment of the disconnector of the present utility model is in outer space. Since there is no atmospheric pressure, in the process of docking and disengaging of the existing quick connector, due to the high pressure of the working medium in the pipeline, when the sealing ring moves to During the butt joint, due to the large pressure difference between the inside and outside, it is easy to cause the sealing ring to cut and the liquid to spray out from the inside, reducing the safety of on-orbit operations. Based on this requirement, the utility model adopts the design of double sealing rings. As shown in Figure 2, two sealing rings are arranged side by side between the inner circle of the socket housing 21 and the sliding core cap 23, and there is a certain interval between them, as shown in Figure 2a, Figure 2b and Figure 2c, During the docking process of the plug 1 and the socket 2, the fixed sliding core 18 gradually retracts into the fixed seat 27 against the socket sliding core rod 24, and under the action of the socket spring 25, the sealing sliding core 16 moves forward simultaneously with the fixed sliding core 18 sports. Then the socket housing 21 is gradually sleeved on the outer circle of the sealing sliding core 16, and the two sealing rings pass through the docking interface between the fixed sliding core 18 and the sliding core cap 23 successively. After a sealing ring crosses the docking interface, it realizes the sealing function for the sealing sliding core 16. At this time, the second sealing ring at the rear end has not crossed the docking interface, and is still at the position of the sliding core cap 23, and it is also sealed In this way, double sealing can be achieved to prevent outside air from entering the socket 2; on the contrary, when the socket 2 is disengaged from the plug 1, the fixed sliding core 18 and the plug housing 12 will retreat, and due to the force of the plug spring 13, the sealing sliding core 16 will not Moving, that is, moving forward relative to the fixed sliding core 18, the front end of the sealing sliding core 16 gradually approaches the head of the fixed sliding core 18, and gradually seals the oil circuit of the plug 1; at the same time, the sliding core cap 23 is due to the socket spring 25 Due to the action of force, it gradually protrudes from the fixed seat 27. Since the socket housing 21 is fixed on the socket 2 and remains motionless, the socket sliding core rod 24 gradually approaches the head of the socket housing 21, gradually closing the oil circuit of the socket part. Sealing; when the sliding core cap 23 moves to the end of the sealing sliding core 16, a backward thrust is generated on the sealing sliding core 16, the sealing sliding core 16 moves backward, and the socket housing 21 is gradually sleeved on the sliding core cap 23. After the second sealing ring crosses the docking surface, it will seal the socket 2 part. The first sealing ring remains on the sealing sliding core 16 to seal the oil circuit of the plug 1 part. The two sealings can prevent dripping .

In order to further improve the sealing effect, the sealing ring of the utility model is processed by a vulcanization sealing process. Among them, the structural form of a sealing ring near the end is: a groove is processed on the inner circle of the socket housing 21, and a seal is vulcanized in the groove. There is a boss in the middle of the seal, and the height of the boss is slightly higher. on the end face of the groove. Wherein, the radius of the concave table is 0.5 mm.

If the quick joint in the prior art is used, because the staff have to overcome a large force to make the male and female joints dock and separate, this will bring great challenges to the astronauts' on-orbit operations. Therefore, the utility model disconnects The device adopts the method of screw connection. As shown in Figure 2, a nut 19 is set on the outer circle of the front end of the plug 1, and two circles of protrusions are processed on the outer circle of the plug housing 12, and the rear end of the nut 19 is stuck between the two circles of protrusions through a limit screw. This allows the nut 19 to rotate while preventing it from coming out of the front end of the plug housing 12 . The outer circle of the front end of the socket housing 21 is fixed with a threaded sleeve 26, and the threaded sleeve 26 is processed with an external thread that matches the internal thread of the nut 19. When the plug 1 and the socket 2 are docked, by rotating the nut 19, the docking can be gradually realized. . A gasket 15 higher than the protrusion is arranged on the contact surface of the rear end of the nut 19 and a circle of the protrusion at the rear end, which can protect the nut 19 after it is tightened. When disengaging, reversely rotate the nut 19 to separate the plug 1 from the socket 2. The in-line threaded rotary connection is used for docking, which converts the excessive docking force caused by the liquid pressure and sealing spring force during the pressurized docking process into torque, making it easy for astronauts to operate.

In the prior art, the housing of the female connector 02 is aligned with the end face of the movable sliding core 03, but in the present utility model, the front end of the plug housing 12 is higher than the front end of the fixed sliding core 18, leaving a gap between the socket housing 21 and the threaded sleeve 26. There is a gap to form a guide groove 28 that can cooperate with the outer circumferential surface of the plug housing 1). When docking, the plug housing 12 first extends into the guide groove 28 of the socket housing 21 to play a guiding role, which is convenient butt.

In addition, the utility model also processes the guide key 110 on the outer surface of the front end of the plug housing 12, and processes the corresponding key groove in the guide groove 28 of the socket housing 21. To further guide the action, it can also avoid the rotation of the plug 1 and the rotation of the sealing sliding core 16 during the docking, which will cause the sealing surface to wear, thereby reducing the reliability of the on-rail maintenance pipeline seal.

Both the nut 19 and the threaded sleeve 26 adopt trapezoidal threads. In order to ensure that there is no meshing and seizure between the thread pairs of the two aluminum parts, the external thread (aluminum 7A04-T6) is hard anodized, and the internal thread (2A12-T4) Low temperature oxidation treatment is adopted. The two ends of the product under pressure connection need to overcome the resistance of more than 500N, docking and separation 1100 times, the product thread pair surface has no wear, good lubricity, and meets the product service life requirements.

To sum up, the above are only preferred embodiments of the present utility model, and are not intended to limit the protection scope of the present utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present utility model shall be included in the protection scope of the present utility model.

Claims (8)

1. A liquid circuit breaker for on-rail maintenance, comprising a plug (1) and a socket (2), characterized in that: The plug (1) includes a plug housing (12), a sealing sliding core (16), a fixed sliding core (18) and a plug spring (13); the fixed sliding core (18) is located inside the plug housing (12) and fixed ; The outer circle of the sealing sliding core (16) matches the inner circle of the plug housing (12), and a plug sealing ring (14) is arranged between the two; one end of the sealing sliding core (16) and the bottom of the plug housing (12) A plug spring (13) is arranged between them, and under the action of the plug spring (13), the other end of the sealing sliding core (16) conflicts with a circle of protrusions on the front end of the fixed sliding core (18), so as to realize the sealing of the plug oil circuit; The socket (2) includes a socket housing (21), a socket sliding core rod (24), a fixed seat (27), a sliding core cap (23) and a socket spring (25); the socket sliding core rod (24) can Slide in the fixed seat (27), the front end of the socket sliding core rod (24) fixes the sliding core cap (23), and the socket spring (25) is set between the sliding core cap (23) rear end and the socket housing (21); The outer circle of the sliding core cap (23) cooperates with the inner circle of the socket housing (21), and a socket sealing ring (22) is arranged between the two to realize the sealing of the oil circuit of the socket (2); the socket sealing ring ( 22) Including two sealing rings. 2. The liquid circuit breaker for on-rail maintenance according to claim 1, characterized in that, the sealing ring located on the end side of the socket (2) in the socket sealing ring (22) is processed by a vulcanization sealing process. become. 3. The liquid circuit breaker for on-rail maintenance according to claim 2, characterized in that, the specific structure of the sealing ring located at the end side of the socket (2) is: the inner circumference of the socket housing (21) A circle of grooves is processed on the top, and the seal is vulcanized in the groove. There is a boss with a radius of 0.5mm in the middle of the seal, and the height of the boss is slightly higher than the end surface of the groove. 4. An on-rail maintenance liquid circuit breaker according to claim 1, 2 or 3, characterized in that, the front end of the plug housing (12) is sleeved with a nut (19), and the end of the nut (19) Be provided with the limit screw (17) that prevents it from protruding from the front end of plug housing (12); The internal thread of the nut (19) cooperates with the external thread. 5 . The liquid circuit breaker for on-rail maintenance according to claim 4 , characterized in that, the internal thread of the nut ( 19 ) and the external thread of the threaded sleeve ( 26 ) both adopt trapezoidal threads. 6. The liquid circuit breaker for on-rail maintenance according to claim 5, characterized in that, the external thread of the threaded sleeve (26) is hard anodized, and the internal thread of the nut (19) Low temperature oxidation treatment is adopted. 7. The hydraulic circuit breaker for on-rail maintenance according to claim 1 or 2, characterized in that, the front end of the plug housing (12) is higher than the front end of the fixed sliding core (18), and the socket housing There is a gap between (21) and the threaded sleeve (26), forming a guide groove (28) that can cooperate with the outer peripheral surface of the plug housing (12). 8. An on-rail maintenance liquid circuit breaker as claimed in claim 7, characterized in that guide keys (110) are processed on the outer peripheral surface of the front end of the plug housing (12), and guide keys (110) are processed on the guide keys of the socket housing (21). The corresponding keyway is processed on the inner circumferential surface of the guide groove (28).