阅读说明：本技术 液体火箭管路分离装置 (Liquid rocket pipeline separation device ) 是由 杨瑞康 于 2019-08-08 设计创作，主要内容包括：本发明提供了一种液体火箭管路分离装置,包括第一法兰管路,第二法兰管路、夹紧机构、推拉机构及作动机构。所述第一法兰管路和所述第二法兰管路沿第一方向对接,且彼此对接的对接端面通过夹紧机构限位,所述第一法兰管路和所述第二法兰管路在对接后彼此相反的端面分别用于连接不同的介质管路；所述作动机构用于推动推拉机构使所述夹紧机构解除对所述对接端面的限位。本发明的液体火箭管路分离装置,通过设置夹紧机构及作动机构,可以在作动机构工作时,快速推动夹紧机构脱出,从而解除对第一法兰管路和第二法兰管路的限位,确保两个管路安全分离。(The invention provides a liquid rocket pipeline separating device which comprises a first flange pipeline, a second flange pipeline, a clamping mechanism, a push-pull mechanism and an actuating mechanism. The first flange pipeline and the second flange pipeline are butted in a first direction, butted end faces are limited by a clamping mechanism, and the end faces opposite to each other after the first flange pipeline and the second flange pipeline are butted are respectively used for connecting different medium pipelines; the actuating mechanism is used for pushing the push-pull mechanism to enable the clamping mechanism to release the limit of the butt joint end face. According to the liquid rocket pipeline separation device, the clamping mechanism and the actuating mechanism are arranged, so that the clamping mechanism can be quickly pushed to be separated when the actuating mechanism works, the limit on the first flange pipeline and the second flange pipeline is removed, and the safe separation of the two pipelines is ensured.)

1. A liquid rocket pipeline separation device is characterized by comprising a first flange pipeline, a second flange pipeline, a clamping mechanism, a push-pull structure and an actuating mechanism;

the first flange pipeline and the second flange pipeline are butted with each other through butted end faces, the clamping mechanism is used for limiting the first flange pipeline and the second flange pipeline at the butted end faces, and the end faces, opposite to each other, of the first flange pipeline and the second flange pipeline after being butted are respectively used for connecting different medium pipelines;

the push-pull structure sequentially comprises an actuating section, a pushing section and a limiting section, wherein the actuating section is used for being matched with the actuating mechanism to move, and the limiting section is used for limiting the clamping mechanism;

the actuating mechanism comprises an actuating cylinder, the actuating section is arranged in a cavity of the actuating cylinder through a piston, and the other side of the piston of the actuating cylinder is provided with a cavity for accessing air flow or generating air flow;

when the cavity on the other side of the piston of the actuating cylinder is connected with air flow or generates air flow, the piston and the actuating section are pushed to move, so that the limiting section relieves the limitation on the clamping mechanism and the pushing section pushes the clamping mechanism to be separated from the butt joint end face.

2. The liquid rocket conduit separation device of claim 1 wherein said first flange conduit comprises a first flange butt end at an end and a first conduit fixedly connected to said first flange butt end, and said second flange conduit comprises a second flange butt end at an end and a second conduit fixedly connected to said second flange butt end;

the first flange butt joint end and the second flange butt joint end are in butt joint with each other, and the first pipeline and the second pipeline are respectively used for being fixedly connected with a medium pipeline.

3. The liquid rocket pipeline separation device of claim 2, wherein the clamping mechanism is an annular clamping mechanism circumferentially sleeved outside the abutting end faces; the actuating mechanism is arranged on the outer side of the first pipeline far away from the butt joint end of the first flange.

4. The liquid rocket line separating device of claim 3 wherein the annular gripping member is provided with an engaging structure on at least one side in the radial direction;

the retainer segment cooperates with the mating structure to retain the annular clamp when the first and second flange conduits are butted and the annular clamp circumferentially retains the butted end faces; and in the process that the push-pull structure pushes the annular clamping piece to release the limit of the butted end surfaces, the pushing section is used for pushing the matching structure to drive the annular clamping piece to release the limit of the butted end surfaces.

5. The liquid rocket pipeline separation device of claim 4, wherein the annular clamping member is two semicircular rings engaged with each other, and the engaging structures are two protrusions respectively disposed at portions of the two semicircular rings close to each other;

the spacing section includes the middle part and follows two joint portions that the middle part formed to both sides two semicircle rings press from both sides tightly the back that targets in place, two joint portions are through keeping away from two archs actuating the section of thick bamboo side joint and will two archs are spacing.

6. The liquid rocket pipeline separating device of claim 4 wherein the fit size of the pushing portion is larger than the distance between the two protrusions, so that when the pushing portion moves away from the actuating cylinder, the pushing portion pushes the two protrusions to drive the two semicircular rings to release the limit of the butting end face.

7. The liquid rocket conduit separation device of claim 6 wherein the mating dimension of said pushing portion in the direction from said stopper section to said actuator coupling section increases gradually.

8. The liquid rocket pipeline separating device according to claim 1, wherein a spring is sleeved outside the actuating section, one end of the spring abuts against the surface of the piston in a cavity of the actuating cylinder, the other end of the spring abuts against the surface, opposite to the piston, of the cavity of the actuating section in the actuating cylinder, and the spring is at least used for exerting a pulling force on the actuating section when the limiting section limits the clamping mechanism.

9. The liquid rocket pipeline separation device of claim 2 wherein the first and second flange butt ends have circumferentially arranged threaded holes, and the first and second flange butt ends are pre-tensioned to each other by providing pre-tensioning bolts and pre-tensioning nuts through the threaded holes.

10. The liquid rocket pipeline separating device of claim 1 wherein said actuating cylinder is provided with a gas generator on the side of said piston away from said actuating section, said gas generator including an ignition charge, and after said ignition charge is ignited, the generated gas pushes said piston to drive said push-pull structure to push said clamping mechanism to disengage from said abutting end face.

Technical Field

The invention relates to the technical field of liquid rocket pipeline connection, in particular to a liquid rocket pipeline separation device.

Background

When the liquid rocket boosting stage and the core stage supply fuel interactively, pressure-resistant pipelines with different diameters need to be connected reliably, and the liquid rocket boosting stage and the core stage have good air tightness. When the boosting stage is separated from the core stage, the pressure-resistant pipelines need to be separated instantly, and the hardware connection of the boosting stage and the core stage is completely separated.

In addition, when the rocket body and the cabin are separated, the main propellant supply pipeline and the blowing pipeline are required to be capable of completing separation within millisecond time when receiving instructions under the condition of reliable connection. In the above separation occasions of similar applications, the instant plugging performance of the current electrical appliance interface meets the design requirements, but the problem of reliable separation of the pressure-resistant pipeline is not effectively solved.

There is a need to design a liquid rocket pipeline separation device with high reliability and quick response, so as to avoid the launching loss caused by pipeline separation failure.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide a pipeline separating device of a liquid rocket. The pipeline separation device is reliable in connection, and can be quickly separated when a separation instruction is received, so that the reliability of rocket launching is improved.

The invention provides a liquid rocket pipeline separating device which comprises a first flange pipeline, a second flange pipeline, a clamping mechanism, a push-pull structure and an actuating mechanism, wherein the first flange pipeline is connected with the second flange pipeline; the first flange pipeline and the second flange pipeline are butted with each other through butted end faces, the clamping mechanism is used for limiting the first flange pipeline and the second flange pipeline at the butted end faces, and the end faces, opposite to each other, of the first flange pipeline and the second flange pipeline after being butted are respectively used for connecting different medium pipelines; the push-pull structure sequentially comprises an actuating section, a pushing section and a limiting section, wherein the actuating section is used for being matched with the actuating mechanism to move, and the limiting section is used for limiting the clamping mechanism; the actuating mechanism comprises an actuating cylinder, the actuating section is arranged in a cavity of the actuating cylinder through a piston, and the other side of the piston of the actuating cylinder is provided with a cavity for accessing air flow or generating air flow; when the cavity of the actuating cylinder, which is positioned on the other side of the piston, is accessed with air flow or generates air flow, the piston and the actuating section are pushed to move, so that the limiting section relieves the limitation on the clamping mechanism, and the pushing section pushes the clamping mechanism to be separated from the butt joint end face.

In one embodiment, the first flange pipeline comprises a first flange butt end at an end portion and a first pipeline fixedly connected with the first flange butt end, and the second flange pipeline comprises a second flange butt end at an end portion and a second pipeline fixedly connected with the second flange butt end; the first flange butt joint end and the second flange butt joint end are in butt joint with each other, and the first pipeline and the second pipeline are respectively used for being fixedly connected with a medium pipeline.

In one embodiment, the clamping mechanism is an annular clamping mechanism circumferentially sleeved outside the butt end face; the actuating mechanism is arranged on the outer side of the first pipeline far away from the butt joint end of the first flange.

In one embodiment, the annular clamping member is provided with an engagement formation on at least one side in the radial direction; the retainer segment cooperates with the mating structure to retain the annular clamp when the first and second flange conduits are butted and the annular clamp circumferentially retains the butted end faces; and in the process that the push-pull structure pushes the annular clamping piece to release the limit of the butted end surfaces, the pushing section is used for pushing the matching structure to drive the annular clamping piece to release the limit of the butted end surfaces.

In one embodiment, the annular clamping piece is two semicircular rings which are matched with each other, and the matching structures are respectively bulges arranged at the parts, close to each other, of the two semicircular rings; the spacing section includes the middle part and follows two joint portions that the middle part formed to both sides two semicircle rings press from both sides tightly the back that targets in place, two joint portions are through following two archs are kept away from it is in to actuate the side joint two archs will two semicircle ring are spacing.

In one embodiment, the matching size of the pushing part is larger than the distance between the two protrusions, so that when the pushing part moves away from the actuating cylinder, the two protrusions are pushed to drive the two semicircular rings to release the limit of the butting end face.

In one embodiment, the fitting dimension of the pushing part in the direction from the limiting section to the actuating connecting section gradually increases.

In one embodiment, a spring is sleeved outside the actuating section, one end of the spring abuts against the surface of the piston in a cavity of the actuating cylinder, the other end of the spring abuts against the surface, opposite to the piston, of the cavity of the actuating section in the actuating cylinder, and the spring is at least used for applying a pulling force to the actuating section when the limiting section limits the clamping mechanism.

In one embodiment, the first flange butt joint end and the second flange butt joint end are provided with threaded holes arranged circumferentially, and the first flange butt joint end and the second flange butt joint end are pre-tightened with each other by arranging a pre-tightening bolt and a pre-tightening nut through the threaded holes.

In one embodiment, the actuating cylinder is provided with a gas generator on the side of the piston away from the actuating section, the gas generator comprises ignition powder, and after the ignition powder is ignited, the generated gas pushes the piston to drive the push-pull structure to push the clamping mechanism to be separated from the butt joint end face.

According to the pipeline separation device provided by the invention, the clamping mechanism is arranged on the butt joint end face of the flange pipeline, and the actuating cylinder and the actuating rod are matched with the clamping mechanism to act, so that the butt joint pipeline can be reliably separated, and the reliability of rocket launching is improved.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention, as claimed.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description, serve to explain the principles of the invention.

Fig. 1 is a schematic structural diagram of a pipeline separation device according to an embodiment of the present invention.

Fig. 2 and 3 are schematic cross-sectional views of fig. 1 taken along the line connecting the end faces of the two rams.

Fig. 4a is a schematic side view of a pipeline separation device according to an embodiment of the present invention.

Figure 4b is a schematic cross-sectional view of figure 4a taken along the line connecting the midpoints of the end faces of the two rams.

Fig. 5a is a schematic side view of a pipeline separation device according to an embodiment of the present invention.

Fig. 5b is a schematic top view of a pipeline separation device according to an embodiment of the present invention.

Fig. 6a is a schematic structural diagram of a pipeline separation device in which the clamping mechanism is two semicircular rings according to an embodiment of the present invention.

Fig. 6b is a schematic view of a clamping structure of the limiting section and the annular clamping member in the pipeline separating device according to the embodiment of the invention.

Fig. 7 is a schematic diagram of a pipe separator with a spring in the actuator cylinder according to an embodiment of the present invention.

FIG. 8 is a schematic diagram illustrating the relationship between the sizes of the pushing section and the two protrusions according to the embodiment of the present invention.

Fig. 9a-9d are schematic diagrams of a pipeline separation device according to an embodiment of the invention in a specific combination.

Fig. 10a to 10c are schematic diagrams illustrating a separation process of the pipeline separation device according to the embodiment of the present invention.

Detailed Description

Reference will now be made in detail to various exemplary embodiments of the invention, the detailed description should not be construed as limiting the invention but as a more detailed description of certain aspects, features and embodiments of the invention.

It will be apparent to those skilled in the art that various modifications and variations can be made in the specific embodiments of the present disclosure without departing from the scope or spirit of the disclosure. Other embodiments will be apparent to those skilled in the art from consideration of the specification. The specification and examples are exemplary only.

The invention provides a pipeline separating device of a liquid rocket. Referring to fig. 1, the pipeline separation device includes a first flange pipeline 1, a second flange pipeline 2, a clamping mechanism 3 and an actuating mechanism 4. The first flange pipeline 1 and the second flange pipeline 2 are butted along a first direction S1, butted end surfaces M (not shown) butted with each other are limited by the clamping mechanism 3, and the end surfaces opposite to each other of the first flange pipeline 1 and the second flange pipeline 2 after being butted are respectively used for connecting different medium pipelines. The actuating mechanism 4 is used for releasing the clamping mechanism 3 from limiting the butted end surfaces M. According to the pipeline separation device provided by the embodiment of the invention, the actuating mechanism 4 is used for controlling the matching relationship between the clamping mechanism 3 and the butt joint end face, so that the butt joint pipeline can be quickly separated.

The clamping mechanism 3 is used for further applying clamping force to the first flange pipeline 1 and the second flange pipeline 2 after the first flange pipeline and the second flange pipeline are butted, so that medium leakage caused by dislocation of the first flange pipeline and the second flange pipeline is avoided. The first flange pipeline 1 and the second flange pipeline 2 can be fastened without adopting connecting pieces such as bolts and the like, and are limited only by the clamping mechanism 3, so that the separation reliability is improved.

For example, the first direction S1 may be the axial direction of the first and second flange pipes 1 and 2, i.e., the direction along which the end faces butted against each other are in close contact with each other when butted against each other, and the end faces opposite to each other after butted against each other are respectively used for connecting the medium pipes upstream and downstream.

For example, as shown in fig. 2, in order to prevent leakage of the medium, a seal 10 may be provided at end surfaces that abut each other. For example, the seal 10 may be a graphite seal, rubber ring, copper pad, temple pad, or the like. For example, a plurality of sealing members may be provided at intervals in the radial direction at the abutting end surface to improve the sealing effect.

With continued reference to fig. 2, for example, the first flanged pipe 1 includes a first flanged butt end 11 at an end and a first pipe 12 fixedly connected to the first flanged butt end 11. The second flanged pipe 2 comprises a second flanged butt end 21 at the end and a second pipe 22 fixedly connected to the second flanged butt end 21. The first flange butt end 11 and the second flange butt end 21 butt against each other, and the first pipe 12 and the second pipe 22 are respectively used for being fixedly connected with the medium pipe. That is, both flange conduits include a butt joint portion and a conduit portion, thereby facilitating both butt joint of both flange conduits and welding upstream and downstream.

As shown in fig. 3, the actuating mechanism 4 comprises a ram 41 and a ram 42, the ram 41 being disposed outside the first pipe 12 away from the first flange butt end 11 (radially outside the first pipe in the figure, and the two rams being symmetrically disposed). For example, two connecting rods may be fixedly provided on the outer side wall of the actuator cylinder 41 along the cylinder diameter thereof, and both ends of the two connecting rods are fixedly connected to the actuator cylinder 41, respectively. The actuating rod 42 is used for cooperating with the clamping mechanism 3 to limit the clamping mechanism 3 or push the clamping mechanism 3 to be separated from the butt joint end surface M. Specifically, when the actuator rod 42 is moved away from the actuator cylinder 41 by the force of the actuator cylinder 41, the clamping mechanism 3 may be pushed away from the abutting end face (e.g., be entirely removed from the outer side of the end face where the first flange pipe and the second flange pipe abut against each other), so that the first flange pipe 1 and the second flange pipe 2 may be automatically separated by the medium pressure.

In this embodiment, as shown in fig. 4a and 4b, the ram 41 may include an actuating chamber 46. The actuating rod 42 sequentially comprises an actuating section 43, a pushing section 44 and a limiting section 45. The actuating section 43 is movably disposed in the actuating chamber 46 through the piston 5, and the actuating chamber 46 pushes the actuating section 43 to drive the pushing section 44 and the limiting section 45 to move through the actuating air on the side of the piston 5 away from the actuating section 43, so as to change the matching relationship with the clamping mechanism 3.

For example, one end of the rod 42 is disposed in the actuating chamber through the piston 5 (for example, one end of the rod is integrally connected to the piston), and the outer edge of the piston 5 abuts against the inner wall of the cylinder 41 in an airtight manner, i.e., the piston 5 can ensure that the chambers of the cylinder 41 are airtight. As shown in fig. 4b, the actuating chamber 46 further includes a small chamber 47 on the other side of the piston 5 from the actuating rod 41, and the small chamber 47 is communicated with the gas generating chamber 48. For example, the gas generating chamber 48 may be used to receive high pressure gas to drive the piston 5 to move after the gas entering the gas generating chamber 48 enters the small chamber 47, or the gas generating chamber 48 may be provided with a powder igniter, a powder generator, etc. to form high pressure gas flow to drive the piston to move through these self-generating gas generating devices.

In another embodiment, the actuator 4 may control the actuation of the actuator cylinder by servo means. Specifically, the actuation of the actuating mechanism 4 may be performed by electromagnetic force instead of gas pushing. For example, when the actuator 4 receives the separation command, the actuator rod 42 may be pushed out by an electromagnetic force (generated by instantaneous energization), so that the actuator rod 42 pushes the clamping mechanism 3 away from the abutting end surface. For example, the actuating mechanism 4 may also be configured to move the actuating rod 42 up and down by driving the actuating rod 42 to move by a servo motor, so as to change the matching relationship with the clamping mechanism 42.

In one embodiment, as shown in fig. 5a, 5b, the clamping mechanism 3 is an annular clamping member for being circumferentially disposed outside the mating end face M of the first flange mating end 11 and the second flange mating end 21 to restrain the first flange mating end 11 and the second flange mating end 21 in the mated position. The annular clamping member is provided with a fitting structure for fitting the pushing section 44 and the stopper section 45. After the annular clamping member is arranged on the butt joint end surface M, the limiting section 45 of the actuating rod 42 is just matched with the matching structure of the annular clamping member from the radial outer side of the annular clamping member, so that the radial deviation of the annular clamping member is prevented, and the butt joint of the flange pipelines is ensured. When the actuating rod 42 moves downwardly as shown in the drawings, the push section 44 first engages the engagement formation and, as the push section 44 continues to move downwardly, it applies a downward force to the engagement formation causing it to move the annular clamp downwardly and away from the abutment of the first and second flanged pipes 1, 2.

In this embodiment, the ring clamp 3 is formed by two semicircular rings 31, 32 engaged with each other, and the engaging structures 33 are protrusions provided at portions of the two semicircular rings adjacent to each other, as shown in fig. 6a, 6b, and 7, for example. The stopper section 45 includes a middle portion 451 and two catching portions 452 formed from the middle portion 451 to both sides. After the two semicircular rings 31 and 32 are clamped in place, the two clamping portions 452 limit the positions of the two semicircular rings 31 and 32 by clamping the two semicircular rings at the two protrusions from the side far away from the actuating cylinder 41.

In some embodiments, to prevent the ring clamp from falling off, it may be formed from four 1/4 rings and correspondingly two sets of corresponding rams and rams may be provided, the two sets forming exactly a cross line through the centre of the circle when viewed from above. Because the central angle of each ring is further reduced, the phenomenon of blocking when the actuating rod pushes the clamping mechanism to move can be avoided, and the reliability of pipeline separation is further improved.

As shown in fig. 7, in the case that the spring R is disposed at one side of the actuating cavity 46 close to the piston 5, the spring R can apply a pulling force to the limiting section 45 when the limiting section 45 is engaged with the two protrusions, so that the portions of the limiting section 45 close to the two semicircular rings 31 and 32 are tightly attached to the surfaces of the two semicircular rings, and the two protrusions limit the limiting section 45 to move upward.

For example, the two semicircular rings may gradually decrease in size from the middle portion to the two ends (e.g., in the circumferential direction of the semicircular arc, the semicircular rings gradually decrease in size from the middle portion to the axial direction of the edge), thereby ensuring that the two ends of the semicircular rings can be quickly separated from the pressing surface of the flange when the clamping mechanism 3 is released.

For example, as shown in FIG. 8, the mating dimension L2 of the push portion 44 is greater than the distance L1 between the two projections. That is, when the pushing part 44 moves downward, the dimension L2 in the direction of the line connecting the two protrusions is larger than the distance L1 between the two protrusions, so that the pushing part 44 can apply force to the two protrusions when the pushing part 44 moves downward. Further, the pushing portion 44 has a structure gradually enlarged in size in a direction from the limiting section 45 to the actuating section 43, for example, a slope structure is formed at both sides of the pushing portion 44 where the two protrusions are engaged. By making the size of the pushing portion 33 increase slowly, the force effect of the pushing portion and the projection can be improved, so that the pushing portion can smoothly push the ring binder.

In one embodiment, the actuating section 43 may be disposed in the actuating chamber 46 by a spring, which is used to apply a pulling force to the actuating rod 42 when the limiting section 45 limits the clamping mechanism 3. For example, the spring may be in a natural state when the ram 2 is uppermost (i.e. the spacing between the limit and the ram is at a minimum) so that the spring applies a pulling force to the ram 42 when the ram 42 is pulled downwardly.

The above embodiments may be combined with each other with corresponding technical effects.

According to the pipeline separation device provided by each embodiment of the invention, the clamping mechanism is arranged on the butt joint end face of the flange pipeline, and the actuating cylinder and the actuating rod are matched with the clamping mechanism to act, so that the butt joint pipeline can be reliably separated, and the reliability of rocket launching is improved.

The embodiment of the invention also provides a pipeline butt joint method of the liquid rocket. For example, as shown in fig. 9a-9d, the docking method may include the steps of:

s1 providing a first flange pipeline 1, a second flange pipeline 2, an annular clamping piece 3 and an actuating mechanism 4; the actuating mechanism 4 has a ram 41 and a ram 42, and one end of the ram 42 is disposed in a cylinder chamber 46 of the ram 41 through a piston 5, and the cylinder chamber 46 is provided with a resilient member on the side of the piston 5 near the ram 42.

For example, as shown in fig. 9b, the resilient member may be a spring R.

S2 butting the first flange pipeline 1 and the second flange pipeline 2, and applying pretightening force on a butting end surface M;

for example, before the first flange pipeline 1 and the second flange pipeline 2 are butted, the method further comprises the following steps: and a graphite sealing gasket is arranged on the butt joint surface of the first flange pipeline 1.

For example, the first flanged pipe 1 includes a first flanged butt end 11 at an end portion and a first pipe 12 fixedly connected to the first flanged butt end 11, and the second flanged pipe 2 includes a second flanged butt end 21 at an end portion and a second pipe 22 fixedly connected to the second flanged butt end 21, wherein the first flanged butt end 11 and the second flanged butt end 21 are provided with threaded holes in a matching manner. Butting the first flange pipeline 1 and the second flange pipeline 2, and applying pretightening force on a butting end surface M specifically comprises the following steps:

after the first flange butt joint end 11 and the second flange butt joint end 21 are butted, a pre-tightening force is applied to the butt joint end surface M by screwing the pre-tightening bolt 6 and the pre-tightening nut 7 into the threaded hole.

Continuing to refer to fig. 9a, S3 pulling the actuating rod to a position where it does not interfere with the abutting end faces and sleeving the ring-shaped clamping member over the abutting end faces of the first and second flanged pipes;

for example, the actuating rod 42 sequentially includes an actuating section 43, a pushing section 44 and a limiting section 45, and moving the actuating rod 42 to a position where it does not interfere with the butt end face M includes:

and stretching the limiting section to a first position, wherein the first position is that after the annular clamping mechanism is sleeved in the butt joint end face, the limiting section, the pushing section and the matching structure are not interfered with each other, and the matching structure is positioned between the limiting section and the pushing section. I.e. to pull the actuating rod 2 to a position which does not interfere with the mounting of the ring clamp 3.

S4, releasing the actuating rod to make the actuating rod under the action of the rebound piece clamp with the matching structure at the radial outer side of the annular clamping piece so as to limit the annular clamping piece (as shown in figure 9 d).

The engaging structure is two protrusions arranged on the radial outer side of the annular clamping piece, the two protrusions are arranged at intervals, and the limiting section 44 comprises a middle part 451 and U-shaped structures 452 formed from the middle part 451 to two sides.

Step S4 releasing the actuating rod 42 to make the actuating rod 42 snap-fit with the engaging structure on the radial outer side of the ring clamping member 3 under the action of the resilient member, so as to limit the ring clamping member 3, comprises:

the U-shaped formations 452 are caused to snap-fit with the two projections from their sides remote from the ram 41 to limit the rebound of the U-shaped formations 452, so that the U-shaped formations 452 exert a restraining force on the ring clamp 3 from the outside thereof under the pulling force of the resilient members.

In the case of the pre-warning of the abutting end surface by the pre-tightening bolt and the pre-tightening nut, the step S4 releases the actuating rod, so that the actuating rod 42 is clamped with the matching structure on the radial outer side of the ring clamping member 3 under the action of the resilient member, so as to position the ring clamping member 3, which may include: and removing the pre-tightening bolt 6 and the pre-tightening nut 7.

The docking method further comprises: the first pipe 12 is connected by welding to the upstream medium pipe and the second pipe 22 is connected by welding to the downstream medium pipe.

Under the condition that the annular clamping piece 3 is two semicircular rings and the two semicircular rings are of structures with gradually reduced sizes from the middle part to the two ends, the actuating rod 42 is pulled to the position without interference with the butt joint end face M, and the butt joint end face M for sleeving the annular clamping piece 3 into the first flange pipeline 1 and the second flange pipeline 2 comprises the following steps:

the two semicircular rings are matingly disposed at the butt end surface M and the ends of the two semicircular rings abut each other to form the ring-shaped clamp 4.

The invention also provides a liquid rocket pipeline separation method corresponding to the butt joint method, as shown in fig. 10a-10c, the separation method comprises the following steps: high-pressure gas enters the cavity on the other side of the piston 5 to push the actuating rod 42 to drive the annular clamping member 3 to be separated from the butt end surface M.

When the cavity of the actuating cylinder 41 is provided with an ignition device at the other side of the piston 5, the step of enabling high-pressure gas to enter the cavity at the other side of the piston so as to push the actuating rod to drive the annular clamping piece to be separated from the butt end face comprises the following steps:

the ignition device receives an ignition signal to ignite, so that high-pressure gas is generated, and the high-pressure gas enters the cavity on the other side of the piston to push the actuating rod to drive the annular clamping piece to be separated from the butt joint end face.

In this figure 10a is a schematic view of the actuator cylinder 41 being actuated, the actuator rod 42 moving downwards and pressing on the two lobes of the annular clamp. In fig. 10b the ring clamp is pushed away from the abutting end faces of the first and second flanged pipe 1 by the action of the actuating rods 42. In fig. 10c, the first flange pipe 1 and the second flange pipe 2 are separated from each other by the medium pressure.

The foregoing is merely an illustrative embodiment of the present invention, and any equivalent changes and modifications made by those skilled in the art without departing from the spirit and principle of the present invention should fall within the protection scope of the present invention.