Horizontal keeping mechanism of vertical pipe of cryogenic liquid loading and unloading arm

Abstract

The present invention discloses a horizontal holding mechanism for a vertical pipe of a cryogenic liquid loading and unloading arm, comprising: a cryogenic rotary joint three; a support plate one fixed to the cryogenic rotary joint three; an outer arm movably connected to the cryogenic rotary joint three at one end; a telescopic component connected to the outer arm at one end, and the other end of the telescopic component is connected to the support plate one; a cryogenic rotary joint four fixedly connected to the other end of the outer arm; a cryogenic rotary joint five for connecting the vertical pipe; and further comprising: a support plate two, one end of which is movably connected to the cryogenic rotary joint four, and the cryogenic rotary joint five is fixedly connected to the support plate two; a bidirectional tension component, one end of which is connected to the other end of the support plate two, and the other end of which is connected to the support plate one. The present invention has the advantage of keeping the axial direction of the vertical pipe parallel to the horizontal plane.

Description

Technical Field

[0001] The invention relates to a horizontal maintaining mechanism for a vertical pipe of a cryogenic liquid loading and unloading arm. Background Art

[0002] Cryogenic liquid loading and unloading arms are mainly used for loading and unloading of cryogenic fluids in the petrochemical industry, such as Figure 1 , Figure 2 The cryogenic liquid loading and unloading arm is mainly composed of a column 1, a bearing seat 2, a cryogenic rotary joint 1 3, an inner arm 4, a cryogenic rotary joint 2 5, a cryogenic rotary joint 3 6, a support plate 1 7, a telescopic component 8, an outer arm 9, a cryogenic rotary joint 4 10, a cryogenic rotary joint 5 11, and a vertical pipe 12. The inner arm 4, the outer arm 9, and the vertical pipe 12 of the horizontal holding mechanism of the vertical pipe of the cryogenic liquid loading and unloading arm realize three-dimensional movement in the horizontal or vertical direction through the rotation of the five cryogenic rotary joints, replacing the cryogenic metal hose to realize the loading and unloading of the cryogenic liquid.

[0003] The existing vertical pipe 12 of the horizontal holding mechanism of the vertical pipe of the cryogenic liquid loading and unloading arm has no limit mechanism, and will naturally sag under the action of gravity, that is, the axial direction of the vertical pipe cannot be kept parallel to the horizontal plane. When docking with the flange of the cryogenic liquid tank truck, the operator needs to lift the vertical pipe horizontally for smooth docking. The vertical pipe weighs about 20 kilograms, and the operator has high labor intensity. Summary of the invention

[0004] The invention provides a horizontal maintaining mechanism for a vertical pipe of a cryogenic liquid loading and unloading arm. The invention can keep the axial direction of the vertical pipe parallel to a horizontal plane.

[0005] The horizontal holding mechanism of the vertical pipe of the cryogenic liquid loading and unloading arm includes:

[0006] Low temperature rotary joint three;

[0007] A support plate 1 fixed to a low temperature rotary joint 3;

[0008] An outer arm having one end movably connected to a low temperature rotary joint;

[0009] A telescopic component connected to the outer arm at one end, and the other end of the telescopic component connected to the support plate;

[0010] A low temperature rotary joint 4 fixedly connected to the other end of the outer arm;

[0011] Low temperature rotary joint for connecting vertical pipes five;

[0012] Also includes:

[0013] Support plate 2, one end of which is movably connected to low-temperature rotary joint 4, and low-temperature rotary joint 5 is fixedly connected to support plate 2;

[0014] A two-way tension component, one end of which is connected to the other end of the second support plate, and the other end of which is connected to the first support plate.

[0015] The advantage of the present invention is that by adding support plate 2 and bidirectional tension assembly to the original loading and unloading arm, through the connection relationship between support plate 2 and bidirectional tension assembly, support plate 1 and low-temperature rotary joint 4, no matter whether the outer arm swings upward or downward, the axial direction of the vertical pipe always remains parallel to the horizontal plane. Therefore, this structure allows the vertical pipe to always remain in a horizontal state before docking with the tank truck flange, which facilitates the docking of the flange. Therefore, when docking with the low-temperature liquid tank truck flange, the operator no longer needs to lift the vertical pipe horizontally for smooth docking, which reduces the labor intensity of the operator. In addition, when the flange bolts are tightened, if the tank truck flange is tilted, the horizontal state of the vertical pipe can be released to achieve a certain elevation angle or depression angle, ensuring that the flange is sealed reliably and preventing the low-temperature liquid from leaking. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of a cryogenic liquid loading and unloading arm in the prior art;

[0017] Figure 2 for Figure 1 A top view of

[0018] Figure 3 It is a schematic diagram of a horizontal maintaining mechanism of a vertical pipe of a cryogenic liquid loading and unloading arm of the present invention;

[0019] Figure 4 for Figure 3 A top view of

[0020] Figure 5 It is a schematic diagram of the cross-sectional structure of a bidirectional tension component;

[0021] Figure 6 It is a structural schematic diagram of locking component one or locking component two;

[0022] Figure 7 This is the front view of the horizontal state of the drop tube when the outer arm is swung upward;

[0023] Figure 8 This is the front view of the horizontal state of the drop tube when the outer arm is swung down;

[0024] Fig. 9 This is the front view of the connection state of the drop pipe when the tank truck flange is tilted downward;

[0025] Fig.10 This is the front view of the connection state of the drop pipe when the tank truck flange is tilted upward;

[0026] Fig.11 It is a cross-sectional view of the elongated bidirectional tension component;

[0027] Fig.12 A shortened cross-section of a bi-directional tension assembly. DETAILED DESCRIPTION

[0028] like Figures 3 to 6 As shown, the horizontal holding mechanism of the vertical pipe of the cryogenic liquid loading and unloading arm of the present invention comprises: a cryogenic rotary joint three 6, a support plate one 7, a telescopic component 8, an outer arm 9, a cryogenic rotary joint four 10, a cryogenic rotary joint five 11, a support plate two 13, and a bidirectional tension component 14. The components and the relationship between them are described in detail below:

[0029] The support plate 7 is fixed to the cryogenic rotary joint 36. Preferably, the support plate 7 is fixed to the flange on one side of the cryogenic rotary joint 36 with bolts, so that the support plate 7 will not rotate relative to the cryogenic rotary joint 36. One end of the outer arm 9 is movably connected to the cryogenic rotary joint 36, and the outer arm 9 can rotate relative to the cryogenic rotary joint 36. One end of the telescopic component 8 is connected to the outer arm 9, and the other end of the telescopic component 8 is connected to the support plate 7. The telescopic component 8 preferably adopts a spring cylinder. The telescopic component 8 enables the outer arm 9 to maintain the position relative to the cryogenic rotary joint 36, and realizes hovering within a certain pitch angle range (-25° to 25°). For example, after the outer arm 9 rotates, the telescopic component 8 keeps the outer arm 9 at a desired position.

[0030] The low temperature rotary joint 4 10 is fixedly connected to the other end of the outer arm 9, and the low temperature rotary joint 5 11 is used to connect the vertical pipe 12; one end of the support plate 2 13 is movably connected to the low temperature rotary joint 4 10, and the support plate 2 13 can rotate relative to the low temperature rotary joint 4 10. The low temperature rotary joint 5 11 is fixedly connected to the support plate 2 13, and when necessary, the low temperature rotary joint 5 11 rotates with the support plate 2 13. One end of the two-way tension component 14 is connected to the other end of the support plate 2 13, and one end of the two-way tension component 14 is connected to the support plate 1 7. One end of the two-way tension component 14 is hinged to the other end of the support plate 2 13, and the other end of the two-way tension component 14 is hinged to the other end of the support plate 2 13.

[0031] The support plate 1 7, the low temperature rotary joint 3 6, the outer arm 9, the low temperature rotary joint 4 10, the support plate 2 13, and the bidirectional tension component 14 are connected to form a polygonal structure. One end of the bidirectional tension component 14 is hinged to the other end of the support plate 2 13, and one end of the bidirectional tension component 14 is hinged to the support plate 1 7. The support plate 1 7 and the support plate 2 13 are parallel.

[0032] The bidirectional tension component 14 includes: a tension rod 15, a cylinder 18, a spring 17, a spring 2 19, a locking component 16, and a locking component 2 20. A portion of the tension rod 15 is located in the cylinder 18, and the other portion of the tension rod 15 is exposed to the outside of the cylinder 18. The portion of the tension rod 15 located in the cylinder 18 is provided with a limiting component. The locking component 16 is sleeved on the tension rod 15 and fixed to the cylinder 18. The locking component 20 is located in the cylinder 18 and fixed to the cylinder 18. The locking component 16 and the locking component 2 20 are respectively located on both sides of the limiting component. The spring 17 is loosely sleeved on the tension rod 15, one end of the spring 17 is against one end of the limiting component, the other end of the spring 17 is against the locking component 16, one end of the spring 2 19 is against the other end of the limiting component, and the other end of the spring 2 19 is against the locking component 2 20. The left end of the cylinder 18 is subjected to a pre-tightening force on the spring 17 by the locking component 16, and the right end of the cylinder 18 is subjected to a pre-tightening force on the spring 2 19 by the locking component 2 20.

[0033] The limiting component includes: a guide component 22 that cooperates with the inner cavity clearance of the cylinder 18, and limiting components 23 arranged at both ends of the guide component 22. The guide component is configured on the circumference of the tension rod 15. One end of the limiting component 23 is provided with a first sleeve portion 23a, and the limiting component 23a is used for spring 17 or spring 2 19 to be sleeved thereon.

[0034] The locking component 1 16 and the locking component 2 20 both include: a connecting portion a provided with a through hole, a second sleeve portion b provided at one end of the connecting portion a, and a screw-on portion c provided at one end of the connecting portion a. The connecting portion a is connected to the cylinder 18; a thread is provided on the outer circumferential surface of the connecting portion a, and the connecting portion a is screw-connected to the cylinder 18. The spring 1 17 or the spring 2 19 is sleeved on the second sleeve portion b, and the screw-on portion c is used to connect to an external rotary drive mechanism, which adopts, for example, a sleeve with an inner hexagonal hole, and the rotating portion c is hexagonal. The external rotary drive mechanism is sleeved on the rotating portion c, and the rotating portion c is rotated to make the locking component 1 16 or the locking component 2 20 screw-connected to the cylinder 18.

[0035] Before the cryogenic liquid loading and unloading arm is docked with the tank truck flange, the cryogenic liquid loading and unloading arm is subjected to only its own weight and the force of the outer arm 9 swinging up and down due to the operation of the personnel in the vertical direction. At this time, with the cryogenic rotary joint 4 10 as the center, a pre-tightening force is applied to the spring 17, and the torque generated must be greater than the torque of the deadweight and the downward swing force of the vertical tube 12. At the same time, a pre-tightening force is also applied to the spring 2 19, and the torque generated must be greater than the torque of the upward swing force of the vertical tube 12. Under the dual action of the pre-tightening force of the springs at both ends, the tension rod 15 is in a balanced state in the cylinder 18 and cannot move left and right. At this time, the length of the two-way tension component 14 is fixed.

[0036] like Figure 7As shown, before the cryogenic liquid loading and unloading arm is docked and fastened with the flange of the cryogenic liquid tank truck, the outer arm 9 is swung upward, the support plate 1 7 is fixed, the support plate 2 13 is parallel to the support plate 1 7, and the vertical pipe 12 connected to the support plate 2 13 can always remain in a horizontal state, which is convenient for docking with the flange of the cryogenic liquid tank truck. Figure 7 The L1 and L2 are 1700mm respectively.

[0037] like Figure 8 As shown, before the cryogenic liquid loading and unloading arm is docked and fastened with the flange of the cryogenic liquid tank truck, the outer arm 9 is swung downward, the support plate 1 7 is fixed, the support plate 2 13 is parallel to the support plate 1 7, and the vertical pipe 12 connected to the support plate 2 13 can always remain in a horizontal state, which is convenient for docking with the flange of the cryogenic liquid tank truck. Figure 8 The L1 and L2 are 1700mm respectively.

[0038] like Fig. 9 As shown in FIG. 1 , when the cryogenic liquid loading and unloading arm is butted and fastened with the flange 21 of the cryogenic liquid tank truck, if the flange 21 of the cryogenic liquid tank truck is tilted downward, so that the angle α between the axial direction of the vertical pipe 12 and the transverse direction of the water equipment is 3°, the torque generated by the tightening of the locking component 16 is greater than the pre-tightening torque of the spring 17 in the bidirectional tension assembly 14, and the tension rod 15 moves leftward in the cylinder 18, as shown in FIG. Fig.10 As shown, the bidirectional tension assembly 14 is extended to realize the bolt connection between the cryogenic liquid loading and unloading arm and the flange of the cryogenic liquid tank truck. Fig. 9 The L1 in is 1700mm, Fig. 9 and Fig.10 The L2 in is 1715.5mm.

[0039] like Fig.11 As shown in FIG. 1 , when the cryogenic liquid loading and unloading arm is butted and fastened with the flange 21 of the cryogenic liquid tank truck, if the flange 21 of the cryogenic liquid tank truck is tilted upward, so that the angle α between the axial direction of the vertical pipe 12 and the transverse direction of the water equipment is 3°, then the torque generated by the tightening of the locking component 20 is greater than the preload torque of the spring 19 in the bidirectional tension assembly 14, and the tension rod 15 moves rightward in the cylinder 18, as shown in FIG. Fig.12 As shown, the bidirectional tension assembly 14 is shortened to achieve the bolt connection between the cryogenic liquid loading and unloading arm and the flange of the cryogenic liquid tank truck. Fig.11 The L1 in is 1700mm, Fig. 9 and Fig.10 The L2 in is 1682.8mm.

[0040] The embodiments described above are only descriptions of the preferred implementation modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should fall within the protection scope determined by the claims of the present invention.

Claims

1. The horizontal holding mechanism of the vertical pipe of the cryogenic liquid loading and unloading arm includes: Low temperature rotary joint three (6); A support plate one (7) fixed to a cryogenic rotary joint three (6); An outer arm (9) having one end movably connected to the low-temperature rotary joint 3 (6); A telescopic component (8) having one end connected to the outer arm (9), and the other end of the telescopic component (8) connected to a supporting plate (7); A low temperature rotary joint (10) fixedly connected to the other end of the outer arm (9); A low temperature rotary joint 5 (11) for connecting a vertical pipe (12); It is characterized by further comprising: Support plate 2 (13), one end of which is movably connected to low-temperature rotary joint 4 (10), and low-temperature rotary joint 5 (11) is fixedly connected to support plate 2 (13); A two-way tension component (14), one end of which is connected to the other end of the second support plate (13), and the other end of which is connected to the first support plate (7), so that the vertical pipe always remains in a horizontal state before being butted against the tank truck flange; The bidirectional tension assembly (14) comprises: a tension rod (15), a cylinder (18), a spring 1 (17), a spring 2 (19), a locking component 1 (16), and a locking component 2 (20). A portion of the tension rod (15) is located in the cylinder (18), and another portion of the tension rod (15) is exposed outside the cylinder (18). The portion of the tension rod (15) located in the cylinder (18) is provided with a limit assembly. The locking component 1 (16) is sleeved on the tension rod (15) and fixed to the cylinder (18). The tightening component 2 (20) is located in the cylinder (18) and is fixed to the cylinder (18), the locking component 1 (16) and the locking component 2 (20) are respectively located on both sides of the limiting assembly, the spring 1 (17) is loosely sleeved on the tension rod (15), one end of the spring 1 (17) abuts against one end of the limiting assembly, the other end of the spring 1 (17) abuts against the locking component 1 (16), one end of the spring 2 (19) abuts against the other end of the limiting assembly, and the other end of the spring 2 (19) abuts against the locking component 2 (20); The locking component 1 (16) and the locking component 2 (20) both comprise: a connecting portion (a) provided with a through hole, a thread being provided on the outer peripheral surface of the connecting portion (a), the connecting portion (a) being threadedly connected to the cylinder barrel (18); a second sleeve connecting portion (b) provided at one end of the connecting portion (a); and a screw connecting portion (c) provided at one end of the connecting portion (a).

2. The horizontal holding mechanism of the vertical pipe of the cryogenic liquid loading and unloading arm according to claim 1 is characterized in that: The support plate 1 (7), the low-temperature rotary joint 3 (6), the outer arm (9), the low-temperature rotary joint 4 (10), the support plate 2 (13), and the bidirectional tension component (14) are connected to form a polygonal structure.

3. The horizontal holding mechanism of the vertical pipe of the cryogenic liquid loading and unloading arm according to claim 1 is characterized in that: One end of the bidirectional tension component (14) is hinged to the other end of the second support plate (13), and one end of the bidirectional tension component (14) is hinged to the first support plate (7).

4. The horizontal holding mechanism for the vertical pipe of the cryogenic liquid loading and unloading arm according to claim 1, characterized in that: Support plate 1 (7) and support plate 2 (13) are parallel.

5. The horizontal holding mechanism of the vertical pipe of the cryogenic liquid loading and unloading arm according to claim 1 is characterized in that: The limiter components include: A guide component (22) is provided to cooperate with the inner cavity clearance of the cylinder (18), and the guide component is arranged on the peripheral surface of the tension rod (15); A limiting component (23) is arranged at both ends of the guide component (22), and a first sleeve connection portion is provided at one end of the limiting component (23).

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