Quick disconnect fitting device

Abstract

The application relates to a quick-separable pipeline joint device in the field of liquid engines, which belongs to the liquid engine field and comprises a connecting pipe, a lower pipe joint, four explosion bolts, an upper pipe joint, a compression spring and a plug core. A partition plate is arranged in the middle of the inner cavity of the connecting pipe in the radial direction. The connecting pipe is divided into two cavities through the partition plate. A through hole is arranged in the center of the partition plate. The plug core is coaxially arranged in the inner cavity of the connecting pipe. The lower pipe joint extends into one cavity of the connecting pipe from one axial end. The upper pipe joint extends into the other cavity of the connecting pipe from the other axial end. The outer wall of the axial one end of the plug core is sleeved with the compression spring and then extends into the upper pipe joint, and the extending end of the lower pipe joint penetrates through the through hole and is connected with the axial other end of the plug core. The four explosion bolts are uniformly distributed on the side wall of the connecting pipe in the circumferential direction. The pipeline joint device provided by the application meets the requirements of quick separation of the pipeline during the separation process of the liquid engine and structural sealing, and makes up for the defects of the existing pipeline separation device, such as complex structure and poor reliability.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of liquid engine, and relates to a quick disconnecting pipe joint device. BACKGROUND

[0002] With the rapid development of civil aerospace field, liquid rocket engine is applied more and more widely. Since liquid engine involves more pipe connections, and in order to make the whole system light and integrated, the storage tanks of multiple liquid engines of different stages are generally designed to share the storage tank. When the first stage engine needs to be disconnected, the pipe connection needs to be quickly disconnected, and the pipe needs to have good sealing effect before and after disconnection.

[0003] However, the current management connection device has complex structure, poor reliability, complex operation, slow response, and cannot guarantee the sealing after disconnection. SUMMARY

[0004] The technical problem solved by the present application is to overcome the shortcomings of the prior art, provide a quick disconnecting pipe joint device, and provide a pipe joint device that meets the requirements of quick pipe disconnection and structural sealing during the disconnection process of the liquid engine, and makes up for the shortcomings of the prior art pipe disconnection device, such as complex structure and poor reliability.

[0005] The technical solution of the present application is as follows:

[0006] A quick disconnecting pipe joint device, comprising a connecting pipe, a lower pipe joint, four explosive bolts, an upper pipe joint, a compression spring and a plug core, wherein the connecting pipe is an axially horizontally placed tubular structure; a partition is arranged in the middle of the inner cavity of the connecting pipe in the radial direction; the connecting pipe is divided into two cavities by the partition; a through hole is arranged in the center of the partition; the plug core is coaxially located in the inner cavity of the connecting pipe; the lower pipe joint extends into one of the cavities of the connecting pipe from one axial end; the upper pipe joint extends into the other cavity of the connecting pipe from the other axial end, and the upper pipe joint is screwed with the connecting pipe; the outer wall of one axial end of the plug core is sleeved with the compression spring and then extends into the upper pipe joint, and the extending end of the lower pipe joint passes through the through hole and is butted with the other axial end of the plug core; the four explosive bolts are uniformly distributed in the side wall of the connecting pipe in the circumferential direction.

[0007] In the above quick disconnecting pipe joint device, the explosive bolts are located at the butt joint of the connecting pipe and the lower pipe joint; the explosive bolts extend from the outer wall of the connecting pipe and are embedded in the side wall of the lower pipe joint, thereby realizing the relative fixation of the connecting pipe and the lower pipe joint.

[0008] In the above quick disconnecting pipe joint device, the outer wall of the part of the lower pipe joint extending out of the connecting pipe is provided with an annular protective sleeve; the cross section of the protective sleeve is L-shaped, and the protective sleeve covers the outside of the explosive bolts, thereby playing a protective role when the explosive bolts explode.

[0009] In the quick detachable pipeline joint device, the outer wall of the lower pipeline joint inserted into the connecting pipe part is embedded with a sealing ring to realize the sealing of the lower pipeline joint and the connecting pipe.

[0010] In the quick detachable pipeline joint device, the end of the lower pipeline joint inserted into the connecting pipe is provided with a top rod and n top rod support beams; the top rod is coaxially extended from the end surface of the lower pipeline joint; the head end of the top rod is in contact with the stop core; the root of the top rod is fixedly connected with the end surface of the lower pipeline joint through the n top rod support beams.

[0011] In the quick detachable pipeline joint device, the n top rod support beams are distributed on the inserted end surface of the lower pipeline joint in a radial spoke manner; n is a positive integer, and 3≤n≤6.

[0012] In the quick detachable pipeline joint device, the end of the upper pipeline joint inserted into the connecting pipe is provided with a guide cylinder and n guide cylinder support beams; the guide cylinder is coaxially extended from the end surface of the upper pipeline joint; the stop core is inserted into the guide cylinder after being sleeved with a compression spring; the compression spring is in a compressed state; the root of the guide cylinder is fixedly connected with the end surface of the upper pipeline joint through the n guide cylinder support beams.

[0013] In the quick detachable pipeline joint device, the n guide cylinder support beams are distributed on the inserted end surface of the upper pipeline joint in a radial spoke manner.

[0014] In the quick detachable pipeline joint device, the stop core is located in the connecting pipe cavity of the upper pipeline joint; the middle part of the stop core is a conical column structure arranged in an axial and horizontal manner; the small-diameter end of the stop core points to the lower pipeline joint, and the large-diameter end of the stop core points to the upper pipeline joint; the axial both ends of the conical column structure are coaxially provided with elongated rods; the elongated rod at the small-diameter end of the conical column structure penetrates through the through hole of the partition plate and is connected with the top rod; the elongated rod at the large-diameter end of the conical column structure is inserted into the guide cylinder after being sleeved with a compression spring.

[0015] In the quick detachable pipeline joint device, the working process of the pipeline joint device is as follows:

[0016] After the explosion of the four explosive bolts, the lower pipeline joint and the connecting pipe lose the limiting; under the action of the reset force of the compression spring, the stop core and the lower pipeline joint are pushed to move axially and outward along the guide cylinder, so that the quick separation of the lower pipeline joint and the connecting pipe is realized; at the same time, the small-diameter end of the middle conical column structure of the stop core blocks the through hole of the partition plate, so that the sealing of the upper pipeline joint is maintained after the separation of the lower pipeline joint.

[0017] Compared with the prior art, the quick detachable pipeline joint device has the following beneficial effects:

[0018] (1) the present application adopts the explosive bolt to unlock the limiting connection between the connecting pipe and the lower pipe joint, which is convenient to operate and responds quickly;

[0019] (2) after the explosion of the explosive bolt, the present application adopts the compressed spring to separate the pipeline, and through the reset force of the compressed spring, the lower pipe joint is quickly bounced away to realize the quick separation of the pipeline;

[0020] (3) the present application adopts the sealing ring and the plug core between the connecting pipe, the lower pipe joint and the upper pipe joint, which can ensure the sealing before and after the separation;

[0021] (4) the present application simplifies the complexity of separation and sealing, has small installation space, high reliability and strong universality. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is the overall schematic view of the pipeline joint device of the present application;

[0023] Figure 2 is the structure schematic view of the lower pipe joint extension end of the present application;

[0024] Figure 3 is the structure schematic view of the upper pipe joint extension end of the present application. DETAILED DESCRIPTION

[0025] The present application will be further described below in combination with examples.

[0026] The present application provides a quick separation pipeline joint device, which meets the requirements of quick separation of pipeline and structure sealing in the process of liquid engine disconnection, and makes up for the deficiency of the existing pipeline separation device structure, which is complex and has poor reliability.

[0027] The quick separation pipeline joint device, such as Figure 1As shown, it specifically comprises connecting pipe 4, lower pipe joint 1, 4 explosive bolts 3, upper pipe joint 5, compression spring 7 and plug core 8; wherein, connecting pipe 4 is axially horizontally placed tubular structure; the middle part of the inner cavity of connecting pipe 4 is provided with a radial baffle 41; connecting pipe 4 is divided into two cavities by baffle 41; the center of baffle 41 is provided with a through hole; plug core 8 is coaxially located in the inner cavity of connecting pipe 4; lower pipe joint 1 extends into one cavity of connecting pipe 4 from one axial end; upper pipe joint 5 extends into the other cavity of connecting pipe 4 from the other axial end, and upper pipe joint 5 is screwed with connecting pipe 4; the outer wall of one axial end of plug core 8 is sleeved with compression spring 7 and then extends into upper pipe joint 5, and the extending end of lower pipe joint 1 penetrates through the through hole and is butted with the other axial end of plug core 8; 4 explosive bolts 3 are uniformly distributed on the side wall of connecting pipe 4 in the circumferential direction; explosive bolts 3 are located at the butt joint of connecting pipe 4 and lower pipe joint 1; explosive bolts 3 extend from the outer wall of connecting pipe 4 and are embedded in the side wall of lower pipe joint 1, so as to realize the relative fixation of connecting pipe 4 and lower pipe joint 1.

[0028] The outer wall of the part of lower pipe joint 1 extending out of connecting pipe 4 is provided with an annular protective sleeve 2; the cross section of protective sleeve 2 is L-shaped, and protective sleeve 2 covers the outside of explosive bolts 3, which plays a protective role when explosive bolts 3 explode.

[0029] In the application, connecting pipe 4 connects lower pipe joint 1 and upper pipe joint 5 respectively, lower pipe joint 1 is connected with connecting pipe 4 through 4 equidistant circumferential explosive bolts 3, and upper pipe joint 5 is connected with connecting pipe 4 through screw thread; protective sleeve is installed on lower pipe joint, which plays a protective role when explosive bolts explode.

[0030] Furthermore, the application also considers the requirement of circumferential sealing, and sealing rings 6 are embedded on the outer wall of the part of lower pipe joint 1 extending into connecting pipe 4, so as to realize the sealing of lower pipe joint 1 and connecting pipe 4; sealing rings 6 are embedded on the outer wall of the part of upper pipe joint 5 extending into connecting pipe 4, so as to realize the sealing of upper pipe joint 5 and connecting pipe 4.

[0031] As shown in the figure, Figure 2 The end of lower pipe joint 1 extending into connecting pipe 4 is provided with a jacking rod 11 and n jacking rod support beams 12; jacking rod 11 coaxially extends out of the end face of lower pipe joint 1; the head end of jacking rod 11 is in contact with plug core 8 for limiting; the root of jacking rod 11 is fixedly connected with the end face of lower pipe joint 1 through n jacking rod support beams 12; n jacking rod support beams 12 are distributed on the extending end face of lower pipe joint 1 in the radial spoke type; n is a positive integer, and 3≤n≤6.

[0032] As shown in the figure, Figure 3As shown in the figure, the upper pipe joint 5 is provided with a guide cylinder 51 and n guide cylinder support beams 52 at one end of the connecting pipe 4; the guide cylinder 51 is coaxially extended from the end surface of the upper pipe joint 5; the outer wall of the plug core 8 is sleeved with the compression spring 7 and then extended into the guide cylinder 51; the compression spring 7 is in a compressed state; the root of the guide cylinder 51 is fixedly connected with the end surface of the upper pipe joint 5 through the n guide cylinder support beams 52. The n guide cylinder support beams 52 are distributed in a spoke manner on the extending end surface of the upper pipe joint 5.

[0033] The plug core 8 is located in the cavity of the connecting pipe 4 where the upper pipe joint 5 is located; the middle part of the plug core 8 is a conical column structure arranged horizontally in the axial direction; the small-diameter end of the plug core 8 points to the lower pipe joint 1, and the large-diameter end of the plug core 8 points to the upper pipe joint 5; the two ends of the conical column structure are coaxially provided with elongated rods; the elongated rod at the small-diameter end of the conical column structure penetrates through the through hole of the partition plate 41 and is connected with the ejector rod 11; the elongated rod at the large-diameter end of the conical column structure is sleeved with the compression spring 7 and then extended into the guide cylinder 51.

[0034] One end of the plug core 8 extends into the guide cylinder 51 of the upper pipe joint 5, the compression spring 7 is sleeved on the plug core 8, and is installed between the plug core 8 and the guide cylinder 51, and the other end of the plug core 8 is in contact with the ejector rod of the lower pipe joint to generate a pre-tightening force.

[0035] In the present application, the ejector rod support beam 12 and the guide cylinder support beam 52 are both provided in a spoke structure, which ensures the smooth flow of the working medium, and the sealing ring 6 ensures the sealing before the device is separated; when the pipeline needs to be separated, the explosive bolt 3 is unlocked after receiving the instruction, the potential energy of the compression spring 7 is released, the plug core 8 moves along the guide cylinder 51 with the compression spring 7, so that the lower pipe joint 1 is quickly separated from the connecting sleeve 4, the plug core 8 blocks the through hole of the connecting sleeve 4, and the sealing of the upper pipe joint 5 after separation is realized.

[0036] The working process of the pipeline joint device is as follows:

[0037] After the explosion of the four explosive bolts 3, the lower pipe joint 1 loses the limit with the connecting pipe 4; under the action of the reset force of the compression spring 7, the plug core 8 and the lower pipe joint 1 are pushed to move axially outward along the guide cylinder 51, so that the lower pipe joint 1 is quickly separated from the connecting pipe 4; at the same time, the small-diameter end of the conical column structure in the middle part of the plug core 8 blocks the through hole of the partition plate 41, so that the sealing of the upper pipe joint 5 after the separation of the lower pipe joint 1 is realized.

[0038] The present application adopts explosive bolts, which is convenient to operate and responds quickly; adopts compression springs, which can realize the quick separation of the pipeline; adopts sealing rings and plug cores, which can ensure the sealing before and after the separation; the present application simplifies the complexity of separation and sealing, has small installation space, high reliability and strong universality.

[0039] Although the present application has been disclosed with reference to the preferred embodiments, it is not intended to limit the present application, and any person skilled in the art can make possible changes and modifications to the technical solutions of the present application using the disclosed methods and technical contents without departing from the spirit and scope of the present application. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present application without departing from the technical solutions of the present application shall fall within the protection scope of the technical solutions of the present application.

Claims

1. A quick disconnect pipe coupling device, characterized by: The utility model provides a kind of pipe joint, including connecting pipe (4), lower pipe joint (1), 4 explosive bolts (3), upper pipe joint (5), compression spring (7) and plug core (8);Wherein, connecting pipe (4) is axially horizontally placed tubular structure;Connecting pipe (4) inner chamber middle part is provided with radial baffle (41);Connecting pipe (4) is divided into two cavities by baffle (41);Baffle (41) center is provided with through-hole;Plug core (8) is coaxially located in connecting pipe (4) inner chamber middle;Lower pipe joint (1) from axial one end enters one cavity of connecting pipe (4);Upper pipe joint (5) from axial other end enters another cavity of connecting pipe (4), and upper pipe joint (5) is screwed with connecting pipe (4);Plug core (8) axial one end outer wall is equipped with compression spring (7) after entering upper pipe joint (5), and lower pipe joint (1) entering end passes through through-hole and is butt joint with plug core (8) axial other end;4 explosive bolts (3) are evenly distributed in the lateral wall of connecting pipe (4) along circumference; Explosive bolt (3) is located at the butt joint of connecting pipe (4) and lower pipe joint (1);Explosive bolt (3) enters from the outer wall of connecting pipe (4) and is embedded in the lateral wall of lower pipe joint (1), to realize the relative fixation of connecting pipe (4) and lower pipe joint (1); The outer wall of the part of lower pipe joint (1) extending out of connecting pipe (4) is provided with an annular protective sleeve (2);The cross section of protective sleeve (2) is L-shaped, and protective sleeve (2) covers the outside of explosive bolt (3), which plays a protective role when explosive bolt (3) explodes.

2. A quick disconnect coupling device according to claim 1, wherein: The outer wall of the part of lower pipe joint (1) extending into connecting pipe (4) is embedded with a sealing ring (6), to realize the sealing of lower pipe joint (1) and connecting pipe (4);The outer wall of the part of upper pipe joint (5) extending into connecting pipe (4) is embedded with a sealing ring (6), to realize the sealing of upper pipe joint (5) and connecting pipe (4).

3. A quick disconnect coupling device according to claim 1, wherein: The end of lower pipe joint (1) extending into connecting pipe (4) is provided with a jacking rod (11) and n jacking rod support beams (12);The jacking rod (11) is coaxially extended from the end surface of lower pipe joint (1);The head end of jacking rod (11) is in contact with plug core (8) for limiting;The root of jacking rod (11) is fixedly connected to the end surface of lower pipe joint (1) through n jacking rod support beams (12).

4. A quick disconnect coupling device as defined in claim 3 wherein: The n jacking rod support beams (12) are radially distributed on the extending end surface of lower pipe joint (1) in spoke form;N is a positive integer, and 3≤n≤6.

5. A quick disconnect coupling device as defined in claim 4 wherein: The end of upper pipe joint (5) extending into connecting pipe (4) is provided with a guide cylinder (51) and n guide cylinder support beams (52);The guide cylinder (51) is coaxially extended from the end surface of upper pipe joint (5);The outer wall of plug core (8) is equipped with compression spring (7) after extending into guide cylinder (51);Compression spring (7) is in a compressed state;The root of guide cylinder (51) is fixedly connected to the end surface of upper pipe joint (5) through n guide cylinder support beams (52).

6. A quick disconnect coupling device as defined in claim 5, wherein: The n guide cylinder support beams (52) are radially distributed on the extending end surface of upper pipe joint (5) in spoke form.

7. A quick disconnect coupling device as defined in claim 6 wherein: The plug core (8) is located in the cavity of the connecting pipe (4) where the upper pipe joint (5) is located; the middle part of the plug core (8) is an axially horizontally placed conical column structure; the small-diameter end of the plug core (8) points to the lower pipe joint (1), and the large-diameter end of the plug core (8) points to the upper pipe joint (5); the axially both ends of the conical column structure are coaxially provided with elongated rods; the elongated rod at the small-diameter end of the conical column structure penetrates through the through hole of the partition plate (41) and is butted against the ejector rod (11); the elongated rod at the large-diameter end of the conical column structure extends into the guide cylinder (51) after sleeving the compression spring (7).

8. A quick disconnect coupling device as defined in claim 7, wherein: The working process of the pipe joint device is as follows: After the explosion of the four explosive bolts (3), the lower pipe joint (1) loses the limit with the connecting pipe (4); under the reset force of the compression spring (7), the plug core (8) and the lower pipe joint (1) are pushed to move axially outward along the guide cylinder (51), so that the quick separation of the lower pipe joint (1) and the connecting pipe (4) is realized; at the same time, the small-diameter end of the middle conical column structure of the plug core (8) blocks the through hole of the partition plate (41), so that the sealing of the upper pipe joint (5) is maintained after the separation of the lower pipe joint (1).

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