A quick connector for liquefied natural gas unloading arm

Abstract

The present invention discloses a liquefied natural gas unloading arm quick connector, including a docking flange and a quick connector mechanism, wherein the docking flange includes a flange front plate, a flange pipeline and a fixed plate, and the quick connector mechanism includes a rotating plate, at least two synchronous connecting rods and at least two clamping assemblies, wherein the rotating plate can be rotatably sleeved on the fixed plate, and a plurality of clamping assemblies can be detachably arranged on the flange front plate, the bottom ends of a plurality of synchronous connecting rods are arranged on the rotating plate, and the top ends of a plurality of synchronous connecting rods are respectively connected to a plurality of clamping assemblies, and the clamping assemblies include a clamping block, and the side wall of the clamping block of each clamping assembly protrudes toward the center line of the flange pipeline to form a clamping end face. The liquefied natural gas unloading arm quick connector disclosed by the present invention realizes the synchronization of the clamping of a plurality of clamping assemblies in time by a rotating plate to connect a plurality of movably connected clamping assemblies of the flange front plate, and the clamping and centering can also be performed simultaneously, which saves time and labor, has strong operability and high centering efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of energy transportation, and in particular to a liquefied natural gas unloading arm quick connector. Background Art

[0002] LNG loading arms are specialized equipment used for loading and unloading LNG from vehicles and ships. They serve as transitional connections for transferring LNG between storage facilities. Quick connectors are crucial components connecting the arms to the LNG pipeline. Existing quick connectors have fixed guides, requiring multiple manual adjustments for precise alignment during docking. This increases the difficulty for workers, increases labor and time costs, reduces efficiency, and reduces operability. Summary of the Invention

[0003] The object of the present invention is to provide a liquefied natural gas unloading arm quick connector to solve the problems of cumbersome docking operation, low centering efficiency and poor operability of the existing liquefied natural gas unloading arm.

[0004] The present invention provides a liquefied natural gas unloading arm quick connector, including a docking flange and a quick connection mechanism, wherein the docking flange includes a flange front plate, a flange pipe and a fixed plate, and the flange front plate and the fixed plate are respectively fixed to the two ends of the flange pipe; the quick connection mechanism includes a rotating plate, at least two synchronous connecting rods and at least two clamping assemblies, the rotating plate can be rotatably sleeved on the fixed plate, and a plurality of the clamping assemblies are evenly and detachably arranged on the flange front plate along the circumference of the flange front plate, the bottom ends of a plurality of the synchronous connecting rods are evenly spaced along the circumference of the rotating plate on the rotating plate, and the top ends of a plurality of the synchronous connecting rods are respectively connected to a plurality of the clamping assemblies, and the clamping assembly includes a clamping block, and the side wall of the clamping block of each of the clamping assemblies protrudes toward the center line of the flange pipe to form a clamping end face.

[0005] The two guide devices are connected to each other with a plurality of guide devices at a same time, and the two guide devices are connected with each other to form a plurality of guide devices at the same time.

[0006] The lockhole that is formed on the locking slats of the first locking slat and the second locking slats is formed on the locking slats of the second slat, and the locking slats on the third locking slat are connected with each other via the locking slats in the locking slats.

[0007] Preferably, a rotary joint synchronous connecting rod docking part and a clamping block docking part are respectively provided at both ends of the rotary joint, the clamping block docking part and the connecting rod docking part of the clamping block are connected by bolts, and the rotary joint synchronous connecting rod docking part is pivotally connected to the synchronous connecting rod.

[0008] Preferably, a buffer spring is provided in the middle of the synchronous connecting rod, and an annular connector and a spherical shell joint are respectively provided at both ends of the synchronous connecting rod, the annular connector is coaxially pivoted with the rotary joint synchronous connecting rod docking part of the rotary joint; the spherical shell joint is movably connected to the rotating disk.

[0009] Preferably, the rotating disk is an annular rotating disk, and a plurality of docking rods are evenly fixed on the circumference of the rotating disk. The docking ends of the docking rods are provided with spherical connectors, and the spherical connectors can be rotatably mounted on the spherical shell joints of the synchronous connecting rods.

[0010] Preferably, the liquefied natural gas unloading arm quick connector also includes a power device, which includes a first fixed frame, a second fixed frame and a hydraulic cylinder, the fixed end of the first fixed frame and the fixed end of the second fixed frame are respectively fixed to the fixed plate and the rotating plate, the hydraulic cylinder includes a cylinder barrel and a piston rod, the free end of the first fixed frame and the free end of the second fixed frame are respectively fixed to the cylinder barrel and the piston rod.

[0011] The beneficial effects of the present invention are:

[0012] The present invention discloses a liquefied natural gas unloading arm quick connector. By connecting a plurality of clamping assemblies movably connected to a flange front plate to the same rotating plate, the synchronous clamping of the plurality of clamping assemblies is achieved. During docking, even if there is a large radial displacement between the quick connector and the flange end of the liquefied natural gas transmission pipeline, clamping and centering can be performed simultaneously. This can achieve one-time rapid centering without the need for multiple manual adjustments to achieve precise centering, thus saving time and labor, having strong operability and high centering efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic structural diagram of a liquefied natural gas unloading arm quick connector provided in Example 1 of the present invention;

[0014] Figure 2 A schematic structural diagram of a docking flange provided in Example 1 of the present invention;

[0015] Figure 3 A schematic structural diagram of a fixed plate seat provided in Example 1 of the present invention;

[0016] Figure 4 A schematic structural diagram of a compression block provided in Example 1 of the present invention;

[0017] Figure 5 A schematic structural diagram of a guide device provided in Example 1 of the present invention;

[0018] Figure 6 A schematic structural diagram of a rotary joint provided in Example 1 of the present invention;

[0019] Figure 7 A schematic structural diagram of a rotating disk provided in Example 1 of the present invention;

[0020] Figure 8 A schematic structural diagram of a synchronous connecting rod provided in Example 1 of the present invention;

[0021] Figure 9 This is a schematic structural diagram of a liquefied natural gas unloading arm quick connector with a power unit provided in Example 2 of the present invention. DETAILED DESCRIPTION

[0022] The following examples are used to illustrate the present invention but are not intended to limit the scope of protection of the present invention.

[0023] In describing the embodiments of the present invention, it should be noted that the terms "left" and "right" are based on the orientation or positional relationships depicted in the accompanying drawings and are used for the convenience of describing the present invention. The terms "first," "second," etc. are used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the technical features being described.

[0024] Example 1

[0025] Example 1 provides a liquefied natural gas unloading arm quick connector, and its structure is described in detail below.

[0026] refer to Figure 1 and Figure 2 The liquefied natural gas unloading arm quick connector includes a docking flange and a quick connection mechanism.

[0027] The docking flange includes a flange front plate 1, a flange pipe 2 and a fixed plate 3. A plurality of mounting holes are evenly spaced on the docking surface of the flange front plate 1. The flange front plate 1 and the fixed plate 3 are fixed to the top and bottom ends of the flange pipe 2 respectively.

[0028] The quick-connect mechanism includes a rotating disk 4, four synchronous connecting rods 5, and four clamping assemblies 6. A circular track is provided on the outer wall of the fixed disk 3, and the rotating disk 4 is rotatably mounted on the circular track of the fixed disk 3. The four clamping assemblies 6 are evenly and removably mounted on the flange front disk 1 along the circumference of the flange front disk 1. The bottom ends of the four synchronous connecting rods 5 are evenly spaced along the circumference of the rotating disk 4, and the top ends of the four synchronous connecting rods 5 are respectively connected to the four clamping assemblies 6.

[0029] Each set of clamping components 6 includes a pressing block 61 , a fixing plate seat 62 and two guiding devices 63 .

[0030] refer to Figure 3 Two flange front disk docking holes 621 are provided on both sides of the inner end of the fixed plate seat 62, and the fixed plate seat 62 is fixed to the flange front disk 1 through the two flange front disk docking holes 621 and the mounting holes on the docking surface of the flange front disk 1.

[0031] Two guide device docking seats 622 are respectively provided on both sides of the middle of the fixing plate seat 62 . Each guide device docking seat 622 is provided with a mounting hole. The two guide device docking seats 622 are respectively used to mount two guide devices 63 .

[0032] A clamping block connecting seat 623 is installed at the outer end of the fixed plate seat 62. The clamping block connecting seat 623 includes two connecting seats. Each connecting seat of the clamping block connecting seat 623 is provided with a mounting hole for movably connecting with the synchronous connecting rod 5. Specifically, it is movably connected with the synchronous connecting rod 5 through the connecting rod docking part 612 of the clamping block 61 and the rotating joint 7.

[0033] refer to Figure 4The outer side surface of the clamping block 61 is an arc-shaped surface, and the outer shape is an irregular fan-shaped surface, including a fixed plate seat docking portion 611, a connecting rod docking portion 612 and a guide device docking portion 613. The fixed plate seat docking portion 611 is arranged near the central angle of the fan-shaped circle of the clamping block 61, and a sliding rod through-hole is provided on the guide device docking portion 613. The guide device docking portion 613 and the connecting rod docking portion 612 are respectively located on both sides of the fixed plate seat docking portion 611, and a rotary joint mounting hole is provided on the connecting rod docking portion 612. The fixed plate seat docking portion 611 is provided with a fixed plate seat mounting hole. The side wall of the guide device docking portion 613 protrudes outward to form a clamping end face 610.

[0034] refer to Figure 5 The guide device 63 includes a first guide plate 631 , a second guide plate 632 and a plurality of fixing bolts 633 .

[0035] The first guide plate 631 and the second guide plate 632 both include a sliding rod connecting portion at the top and a fixed plate seat connecting portion at the bottom. The sliding rod connecting portion and the fixed plate seat connecting portion are butted together to form a whole. Specifically, the center line of the fixed plate seat connecting portion is butted at an obtuse angle to the center line of the sliding rod connecting portion. Preferably, the sliding rod connecting portion and the fixed plate seat connecting end are integrally formed.

[0036] The middle of the sliding rod connecting portion of the first guide plate 631 and the second guide plate 632 is provided with a sliding groove 80, which is in the shape of a long strip. The first guide plate 631 and the second guide plate 632 on both sides of the sliding groove 80 have two rows of bolt holes. Figure 5 There are 3 bolt holes in each row, and the two rows together have a total of 6 bolt holes. The first guide plate 631 and the second guide plate 632 are arranged parallel to each other, and the first guide plate 631 and the second guide plate 632 are horizontally connected by 6 fixing bolts 633 to form a whole.

[0037] The fixed plate seat connecting portions of the first guide plate 631 and the second guide plate 632 are both provided with fixed plate seat pivot holes 630. The fixed plate seat connecting portions of the first guide plate 631 and the second guide plate 632 are respectively provided on either side of the guide device docking seat 622 of the fixed plate seat 62. Bolts or pivots are passed through the fixed plate seat pivot holes 630 of the fixed plate seat connecting portions of the first guide plate 631 and the second guide plate 632 and the mounting hole of the guide device docking seat 622 therebetween to achieve coaxial pivotal connection between one of the guide devices 63 and one of the guide device docking seats 622 of the fixed plate seat 62. The fixed plate seat connecting ends of the first guide plate 631 and the second guide plate 632 together constitute the fixed plate seat connecting portion of the guide device 63. Similarly, the fixed plate seat connecting portions of the two guide devices 63 are coaxially pivotally connected to the two guide device docking seats 622 of the fixed plate seat 62.

[0038] The two guide devices 63 are pivotally connected to the two sides of the middle part of the fixed plate seat 62 through two guide device docking seats 622 respectively. A sliding rod 8 is horizontally arranged between the sliding grooves 80 of the two guide devices 63. The guide device docking portion 613 of the clamping block 61 is passed through the sliding rod 8, thereby realizing the coaxial pivot connection between the guide device docking portion 613 of the clamping block 61 and the two guide devices 63.

[0039] Continue to refer Figure 1 The fixed plate seat docking portion 611 of the pressing block 61 is pivotally connected to the pressing block connecting seat 623 through the fixed plate seat mounting hole.

[0040] The two guides 63 are pivotally connected to either side of the middle portion of the fixed plate seat 62 through the fixed plate seat pivot holes 630. A sliding rod 8 is disposed transversely between the sliding slots 80 of the two guides 63. The sliding rod 8 passes through the sliding rod through-holes of the guide docking portion 613 of the pressure block 61, connecting the guide docking portion 613 of the pressure block 61 with the two guides 63, thereby achieving coaxial pivotal connection between the two guides 63 and the guide docking portion 613 of the pressure block 61. The connecting rod docking portion 612 of the pressure block 61 is connected to the synchronous connecting rod 5 via a rotary joint 7.

[0041] Specifically, refer to Figure 6 The two ends of the rotary joint 7 are respectively provided with a rotary joint synchronous connecting rod docking portion 71 and a pressing block docking portion 72.

[0042] A bolt hole is provided in the clamping block docking portion 72 of the rotary joint 7, and an internal thread is provided in the bolt hole. A rotary joint mounting hole is provided on the connecting rod docking portion 612. The clamping block docking portion 72 of the rotary joint 7 is connected to the connecting rod docking portion 612 of the clamping block 61 by bolts.

[0043] refer to Figure 7 The rotating disk 4 is an annular rotating disk, and a plurality of docking rods 41 are evenly fixed on the circumference of the rotating disk 4. The docking ends of the docking rods 41 are provided with spherical connectors 42.

[0044] refer to Figure 8 A buffer spring 51 is provided in the middle of the synchronous connecting rod 5, and an annular connector 52 and a spherical shell joint 53 are respectively provided at both ends of the synchronous connecting rod 5. The spherical connector 42 of the docking rod 41 can be rotatably sleeved on the spherical shell joint 53 of the synchronous connecting rod 5. A mounting hole is provided on the annular connector 52 of the synchronous connecting rod 5, and two mounting holes are provided in pairs on the rotary joint synchronous connecting rod docking part 71. The annular connector 52 of the synchronous connecting rod 5 is coaxially pivoted with the rotary joint synchronous connecting rod docking part 71 of the rotary joint 7.

[0045] Example 2

[0046] Based on the liquefied natural gas unloading arm quick connector provided in Example 1, Example 2 adds a power unit. The structure of the added power unit and its connection relationship are described in detail below.

[0047] refer to Figure 9 The power device includes a first fixed frame 91, a second fixed frame 92 and a hydraulic cylinder 93.

[0048] The fixed end of the first fixing frame 91 and the fixed end of the second fixing frame 92 are fixed to the fixed disk 3 and the rotating disk 4 respectively. The hydraulic cylinder 93 includes a cylinder barrel and a piston rod. The free end of the first fixing frame 91 and the free end of the second fixing frame 92 are fixed to the cylinder barrel and the piston rod respectively.

[0049] Although the present invention has been described in detail above using general descriptions and specific embodiments, it will be apparent to those skilled in the art that modifications and improvements may be made thereto. Therefore, such modifications and improvements, without departing from the spirit of the present invention, are intended to be within the scope of protection claimed herein.

Claims

1. A liquefied natural gas unloading arm quick connector, characterized in that: Including docking flange, quick connection mechanism and power device, The butt flange comprises a flange front plate (1), a flange pipe (2) and a fixing plate (3), wherein the flange front plate (1) and the fixing plate (3) are respectively fixed to two ends of the flange pipe (2); The quick-connect mechanism comprises a rotating disk (4), at least two synchronous connecting rods (5) and at least two clamping assemblies (6). The rotating disk (4) is an annular rotating disk, and the rotating disk (4) can be rotatably sleeved on the fixed disk (3). A plurality of the clamping assemblies (6) are evenly and detachably arranged on the flange front disk (1) along the circumference of the flange front disk (1). The bottom ends of a plurality of the synchronous connecting rods (5) are evenly spaced and arranged on the rotating disk (4) along the circumference of the rotating disk (4), and the top ends of the plurality of the synchronous connecting rods (5) are respectively connected to a plurality of the clamping assemblies (6); The clamping assembly (6) comprises a clamping block (61), a fixed plate seat (62) and two guide devices (63); the side wall of the clamping block (61) of each clamping assembly (6) protrudes toward the center line of the flange pipe (2) to form a clamping end surface (610); a plurality of fixed plate seats (62) of the clamping assembly (6) are evenly spaced and fixed to the back side of the flange front plate (1) along the outer circumference of the flange front plate (1); the clamping block (61) comprises a fixed plate seat docking portion (611), a connecting rod docking portion (612) and a guide device docking portion (613); the guide device docking portion (613) and the connecting rod docking portion (612) are respectively located at the fixed plate seat docking portion (611) and the connecting rod docking portion (612). 1), the side walls of the guide device docking portion (613) protrude outward to form the clamping end surface (610); the two guide devices (63) are pivotally connected to the two sides of the middle part of the fixed plate seat (62), the guide device docking portion (613) of the clamping block (61) is coaxially pivotally connected to the two guide devices (63), the outer end of the fixed plate seat (62) is equipped with a clamping block connecting seat (623), the fixed plate seat docking portion (611) of the clamping block (61) is pivotally connected to the clamping block connecting seat (623) of the fixed plate seat (62); the guide device (63) includes a first guide plate (631), a second guide plate (632) and a plurality of fixing bolts (633), the first guide plate (631) and the second guide plate (632) are pivotally connected to the clamping block connecting seat (623) of the fixed plate seat (62). The upper and lower ends of the guide plate (631) and the second guide plate (632) are respectively provided with a sliding rod connection part and a fixed plate seat connection part. The middle of the sliding rod connection parts of the first guide plate (631) and the second guide plate (632) are both provided with a sliding groove (80). The first guide plate (631) and the second guide plate (632) on both sides of the sliding groove (80) are respectively provided with two rows of bolt holes. The first guide plate (631) and the second guide plate (632) are arranged parallel to each other, and the first guide plate (631) and the second guide plate (632) are transversely connected to form a whole by a plurality of fixing bolts (633). Two guide device docking seats (622) are respectively provided on both sides of the middle of the fixed plate seat (62). ), the fixed plate seat connecting ends of the first guide plate (631) and the second guide plate (632) together constitute the fixed plate seat connecting portion of the guide device (63), and the fixed plate seat connecting portions of the two guide devices (63) are respectively coaxially pivoted with the two guide device docking seats (622) of the fixed plate seat (62); a sliding rod (8) is transversely arranged between the sliding grooves (80) of the two guide devices (63), and the guide device docking portion (613) of the clamping block (61) is pivotally connected to the two guide devices (63) through the sliding rod (8); the connecting rod docking portion (612) of the clamping block (61) is movably connected to the synchronous connecting rod (5) through a rotating joint (7);The two ends of the rotary joint (7) are respectively provided with a rotary joint synchronous connecting rod docking portion (71) and a clamping block docking portion (72); the clamping block docking portion (72) is connected to the connecting rod docking portion (612) of the clamping block (61) by bolts; and the rotary joint synchronous connecting rod docking portion (71) is pivotally connected to the synchronous connecting rod (5); A buffer spring (51) is provided in the middle of the synchronous connecting rod (5), and an annular connector (52) and a spherical shell joint (53) are provided at both ends of the synchronous connecting rod (5), the annular connector (52) is coaxially pivoted with the rotary joint synchronous connecting rod docking portion (71) of the rotary joint (7); the spherical shell joint (53) is movably connected with the rotating disk (4); a plurality of docking rods (41) are evenly fixed around the circumference of the rotating disk (4), and a spherical connector (42) is provided at the docking end of the docking rod (41), and the spherical connector (42) can be rotatably sleeved on the spherical shell joint (53) of the synchronous connecting rod (5); The power device comprises a first fixed frame (91), a second fixed frame (92) and a hydraulic cylinder (93), wherein the fixed end of the first fixed frame (91) and the fixed end of the second fixed frame (92) are respectively fixed to the fixed disk (3) and the rotating disk (4), and the hydraulic cylinder (93) comprises a cylinder barrel and a piston rod, and the free end of the first fixed frame (91) and the free end of the second fixed frame (92) are respectively fixed to the cylinder barrel and the piston rod.

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