阅读说明：本技术 低温液体装卸臂垂管的水平保持机构 (Horizontal holding mechanism for low-temperature liquid loading and unloading arm vertical pipe ) 是由 杨昌文 林冬娅 胡术生 陈维银 刘太平 冯波 李鸿军 孙鹏 唐永东 程洪 黎东 于 2019-10-18 设计创作，主要内容包括：本发明公开了一种低温液体装卸臂垂管的水平保持机构,包括：低温旋转接头三；与低温旋转接头三固定的支撑板一；一端与低温旋转接头三活动连接的外臂；一端与外臂连接的伸缩部件,伸缩部件的另一端与支撑板一连接；与外臂另一端固定连接的低温旋转接头四；用于连接垂管的低温旋转接头五；还包括：支撑板二,支撑板二的一端与低温旋转接头四活动连接,所述低温旋转接头五与支撑板二固定连接；双向拉力组件,双向拉力组件的一端与支撑板二的另一端连接,双向拉力组件的另一端与支撑板一连接。本发明具有使垂管的轴向与水平面保持平行的优点。(The invention discloses a horizontal holding mechanism of a low-temperature liquid loading and unloading arm vertical pipe, which comprises: a third low-temperature rotary joint; the first supporting plate is fixed with the third low-temperature rotary joint; one end of the outer arm is movably connected with the low-temperature rotary joint III; one end of the telescopic component is connected with the outer arm, and the other end of the telescopic component is connected with the first support plate; a low-temperature rotary joint IV fixedly connected with the other end of the outer arm; a fifth low-temperature rotary joint for connecting the vertical pipe; further comprising: one end of the second support plate is movably connected with the fourth low-temperature rotary joint, and the fifth low-temperature rotary joint is fixedly connected with the second support plate; and one end of the bidirectional tension component is connected with the other end of the second support plate, and the other end of the bidirectional tension component is connected with the first support plate. The invention has the advantage that the axial direction of the vertical pipe is kept parallel to the horizontal plane.)

1. A horizontal holding mechanism of a low-temperature liquid loading and unloading arm vertical pipe comprises:

a third low-temperature rotary joint (6);

a first support plate (7) fixed with the third low-temperature rotary joint (6);

an outer arm (9) with one end movably connected with the low-temperature rotary joint III (6);

one end of the telescopic component (8) is connected with the outer arm (9), and the other end of the telescopic component (8) is connected with the first support plate (7);

a low-temperature rotary joint IV (10) fixedly connected with the other end of the outer arm (9);

a fifth low-temperature rotary joint (11) for connecting the vertical pipe (12);

it is characterized by also comprising:

one end of the second support plate (13) is movably connected with the fourth low-temperature rotary joint (10), and the fifth low-temperature rotary joint (11) is fixedly connected with the second support plate (13);

and one end of the bidirectional tension component (14) is connected with the other end of the second support plate (13), and the other end of the bidirectional tension component (14) is connected with the first support plate (7).

2. The mechanism of claim 1, wherein the holding mechanism comprises: the support plate I (7), the low-temperature rotary joint III (6), the outer arm (9), the low-temperature rotary joint IV (10), the support plate II (13) and the bidirectional tension assembly (14) are connected to form a polygonal structure.

3. The mechanism of claim 1, wherein the holding mechanism comprises: one end of the bidirectional tension component (14) is hinged with the other end of the second support plate (13), and one end of the bidirectional tension component (14) is hinged with the first support plate (7).

4. The mechanism of claim 1, wherein the holding mechanism comprises: the first support plate (7) and the second support plate (13) are parallel.

5. The horizontal holding mechanism of a cryogenic liquid handling arm dip tube according to any one of claims 1 to 4, wherein: the bi-directional tension assembly (14) comprises: the tension rod (15), the cylinder barrel (18), the first spring (17), the second spring (19), the first locking component (16) and the second locking component (20), wherein one part of the tension rod (15) is positioned in the cylinder barrel (18), the other part of the tension rod (15) is exposed outside the cylinder barrel (18), a limiting component is arranged on the part of the tension rod (15) positioned in the cylinder barrel (18), the first locking component (16) is sleeved on the tension rod (15) and fixed with the cylinder barrel (18), the second locking component (20) is positioned in the cylinder barrel (18) and fixed with the cylinder barrel (18), the first locking component (16) and the second locking component (20) are respectively positioned on two sides of the limiting component, the first spring (17) is sleeved on the tension rod (15) in a hollow mode, one end of the first spring (17) abuts against one end of the limiting component, the other end of the first spring (17) abuts against the first locking component (16), and one end of the second spring (19) abuts against the other end of the limiting component, the other end of the second spring (19) abuts against the second locking component (20).

6. The cryogenic liquid handling arm dip tube level retention mechanism of claim 5, wherein: spacing subassembly includes:

a guide member (22) which is in clearance fit with the inner cavity of the cylinder (18) and is arranged on the peripheral surface of the tension rod (15);

limiting parts (23) arranged at two ends of the guide part (22), and a first sleeving part is arranged at one end of each limiting part (23).

7. The cryogenic liquid handling arm dip tube level retention mechanism of claim 5, wherein: the first locking component (16) and the second locking component (20) both comprise:

a connecting portion (a) provided with a through hole, the connecting portion being connected to the cylinder (18);

a second sleeving part (b) arranged at one end of the connecting part (a);

and a rotary connection part (c) arranged at one end of the connection part (a).

8. The cryogenic liquid handling arm dip tube level retention mechanism of claim 7, wherein: the outer peripheral surface of the connecting part (a) is provided with threads, and the connecting part (a) is in threaded connection with the cylinder barrel (18).

Technical Field

The invention relates to a horizontal holding mechanism of a low-temperature liquid loading and unloading arm vertical pipe.

Background

The low-temperature liquid loading and unloading arm is mainly used for loading and unloading low-temperature fluid in the petrochemical industry, and as shown in figures 1 and 2, the low-temperature liquid loading and unloading arm mainly comprises an upright post 1, a bearing seat 2, a first low-temperature rotary joint 3, an inner arm 4, a second low-temperature rotary joint 5, a third low-temperature rotary joint 6, a first support plate 7, a telescopic part 8, an outer arm 9, a fourth low-temperature rotary joint 10, a fifth low-temperature rotary joint 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 low-temperature liquid loading and unloading arm vertical pipe realize three-dimensional movement in the horizontal or vertical direction through the rotation of 5 low-temperature rotary joints, and replace a low-temperature metal hose to realize the loading and unloading of low-temperature liquid.

The vertical pipe 12 of the horizontal holding mechanism of the existing low-temperature liquid loading and unloading arm vertical pipe has no limit mechanism and can naturally droop under the action of gravity, namely the axial direction of the vertical pipe cannot be kept parallel to the horizontal plane. When the low-temperature liquid tank car flange is in butt joint with the low-temperature liquid tank car flange, the vertical pipe can be smoothly in butt joint only by lifting the vertical pipe horizontally by an operator, the self weight of the vertical pipe is about 20 kilograms, and the labor intensity of the operator is high.

Disclosure of Invention

The invention provides a horizontal holding mechanism of a low-temperature liquid loading and unloading arm vertical pipe, which can keep the axial direction of the vertical pipe parallel to a horizontal plane.

A horizontal holding mechanism of a low-temperature liquid loading and unloading arm vertical pipe comprises:

a third low-temperature rotary joint;

the first supporting plate is fixed with the third low-temperature rotary joint;

one end of the outer arm is movably connected with the low-temperature rotary joint III;

one end of the telescopic component is connected with the outer arm, and the other end of the telescopic component is connected with the first support plate;

a low-temperature rotary joint IV fixedly connected with the other end of the outer arm;

a fifth low-temperature rotary joint for connecting the vertical pipe;

further comprising:

one end of the second support plate is movably connected with the fourth low-temperature rotary joint, and the fifth low-temperature rotary joint is fixedly connected with the second support plate;

and one end of the bidirectional tension component is connected with the other end of the second support plate, and the other end of the bidirectional tension component is connected with the first support plate.

The invention has the advantages that the second support plate and the bidirectional tension assembly are additionally arranged on the original loading arm, and the axial direction of the vertical pipe is always kept parallel to the horizontal plane no matter the outer arm swings upwards or downwards through the connection relation between the second support plate and the bidirectional tension assembly and the first support plate and the fourth low-temperature rotary joint, so that the vertical pipe is always kept in a horizontal state before being butted with a tank car flange by the structure, and the flange is convenient to butt. Therefore, when the flange is butted with the flange of the low-temperature liquid tank car, an operator can smoothly butt without horizontally lifting the vertical pipe, and the labor intensity of the operator is reduced. In addition, when the flange is fastened by bolts, if the flange of the tank car inclines, the horizontal state of the vertical pipe can be relieved, a certain elevation angle or depression angle is realized, the sealing reliability of the flange is ensured, and the low-temperature liquid is prevented from leaking.

Drawings

FIG. 1 is a schematic diagram of a cryogenic liquid handling arm according to the prior art;

FIG. 2 is a top view of FIG. 1;

FIG. 3 is a schematic view of the horizontal retention mechanism for the cryogenic liquid handling arm drop of the present invention;

FIG. 4 is a top view of FIG. 3;

FIG. 5 is a schematic cross-sectional view of a bi-directional pulling force assembly;

FIG. 6 is a schematic structural view of a first locking member or a second locking member;

FIG. 7 is a front view of the drop tube in a horizontal position when the outer arm swings upward;

FIG. 8 is a front view of the drop tube in a horizontal position with the outer arm swung down;

FIG. 9 is a front view showing the connection state of the drop pipes when the tank car flange is inclined downward;

FIG. 10 is a front view of the connection of the drop tubes with the tank car flanges tilted upward;

FIG. 11 is an elongated cross-sectional view of the bi-directional tension assembly;

fig. 12 is a cross-sectional view of the shortening of the bi-directional tension assembly.

Detailed Description

As shown in fig. 3 to 6, the horizontal holding mechanism for a cryogenic liquid handling arm drop tube according to the present invention includes: the low-temperature rotary joint three 6, the support plate one 7, the telescopic part 8, the outer arm 9, the low-temperature rotary joint four 10, the low-temperature rotary joint five 11, the support plate two 13 and the bidirectional tension assembly 14 are described in detail below, and the following points and the relationship among the points are described in detail:

the first support plate 7 is fixed to the third cryogenic swivel 6, and preferably, the first support plate 7 is bolted to a flange on one side of the third cryogenic swivel 6 so that the first support plate 7 does not rotate relative to the third cryogenic swivel 6. One end of the outer arm 9 is movably connected with the low-temperature rotary joint III 6, and the outer arm 9 can rotate relative to the low-temperature rotary joint III 6. One end of the telescopic part 8 is connected with the outer arm 9, and the other end of the telescopic part 8 is connected with the first support plate 7. The telescopic member 8 preferably adopts a spring cylinder, the telescopic member 8 relatively maintains the position of the outer arm 9 and the low-temperature rotary joint three 6, and realizes hovering within a certain pitch angle (-25 °), for example, after the outer arm 9 rotates, the telescopic member 8 maintains the outer arm 9 at a required position.

The fourth low-temperature rotary joint 10 is fixedly connected with the other end of the outer arm 9, and the fifth low-temperature rotary joint 11 is used for connecting a vertical pipe 12; one end of the second support plate 13 is movably connected with the fourth low-temperature rotary joint 10, the second support plate 13 can rotate relative to the fourth low-temperature rotary joint 10, the fifth low-temperature rotary joint 11 is fixedly connected with the second support plate 13, and the fifth low-temperature rotary joint 11 rotates along with the second support plate 13 when needed. One end of the bidirectional tension assembly 14 is connected with the other end of the second support plate 13, and one end of the bidirectional tension assembly 14 is connected with the first support plate 7. One end of the bidirectional tension assembly 14 is hinged with the other end of the second support plate 13, and the other end of the bidirectional tension assembly 14 is hinged with the other end of the second support plate 13.

And the first support plate 7, the third low-temperature rotary joint 6, the outer arm 9, the fourth low-temperature rotary joint 10, the second support plate 13 and the bidirectional tension assembly 14 are connected to form a polygonal structure. One end of the bidirectional tension assembly 14 is hinged with the other end of the second support plate 13, and one end of the bidirectional tension assembly 14 is hinged with the first support plate 7. The first support plate 7 and the second support plate 13 are parallel.

The bi-directional pulling force assembly 14 comprises: the tension rod 15, the cylinder 18, the first spring 17, the second spring 19, the first locking component 16 and the second locking component 20 are arranged, one part of the tension rod 15 is located in the cylinder 18, the other part of the tension rod 15 is exposed outside the cylinder 18, a limiting component is arranged on the part, located in the cylinder 18, of the tension rod 15, the first locking component 16 is sleeved on the tension rod 15 and fixed with the cylinder 18, the second locking component 20 is located in the cylinder 18 and fixed with the cylinder 18, the first locking component 16 and the second locking component 20 are located on two sides of the limiting component respectively, the first spring 17 is sleeved on the tension rod 15 in a hollow mode, one end of the first spring 17 abuts against one end of the limiting component, the other end of the first spring 17 abuts against the first locking component 16, one end of the second spring 19 abuts against the other end of the limiting component, and the other end of the second spring 19 abuts against the second locking component 20. The left end of the cylinder 18 is pre-stressed by the first locking component 16 to the first spring 17, and the right end of the cylinder 18 is pre-stressed by the second locking component 20 to the second spring 19.

The spacing subassembly includes: the guide part 22 is in clearance fit with the inner cavity of the cylinder 18, the limiting parts 23 are arranged at two ends of the guide part 22, the guide part is arranged on the peripheral surface of the tension rod 15, one end of the limiting part 23 is provided with a first sleeving part 23a, and the limiting part 23a is used for sleeving the first spring 17 or the second spring 19.

The first locking component 16 and the second locking component 20 both comprise: the connecting part a is provided with a through hole, the second sleeving part b is arranged at one end of the connecting part a, and the screwing part c is arranged at one end of the connecting part a. The connecting part a is connected with the cylinder 18; the outer peripheral surface of the connecting part a is provided with threads, and the connecting part a is in threaded connection with the cylinder 18. The first spring 17 or the second spring 19 is sleeved on the second sleeved part b, the screwed part c is used for connecting an external rotation driving mechanism, the external rotation driving mechanism is a sleeve with a hexagon socket, for example, the rotating part c is hexagonal, the external rotation driving mechanism is sleeved on the rotating part c, and the rotating part c is rotated to enable the first locking part 16 or the second locking part 20 to be in threaded connection with the cylinder 18.

Before the low-temperature liquid loading and unloading arm is in butt joint with the tank car flange, the low-temperature liquid loading and unloading arm only bears the self weight in the vertical direction and the force of the outer arm 9 which is vertically swung by the operation of personnel. At this time, the low-temperature rotary joint IV 10 is taken as a center, pre-tightening force is applied to the spring I17, and the generated moment is required to be larger than the moment of the self weight of the vertical pipe 12 and the downward swinging force. Meanwhile, the second spring 19 is also pre-stressed, and the generated moment is larger than the moment of the swinging force on the vertical pipe 12. Under the double-action of the pre-tightening force of the springs at the two ends, the tension rod 15 is in a balanced state in the cylinder barrel 18 and cannot move left and right, and the length of the bidirectional tension component 14 is fixed.

As shown in figure 7, before the cryogenic liquid loading and unloading arm is butted and fastened with the cryogenic liquid tanker flange, the outer arm 9 swings upwards, the first support plate 7 is fixed, the second support plate 13 is parallel to the first support plate 7, and the vertical pipe 12 connected with the second support plate 13 can be always kept in a horizontal state, so that the cryogenic liquid tanker flange can be butted conveniently. L1 and L2 in FIG. 7 are 1700mm, respectively.

As shown in fig. 8, before the cryogenic liquid loading and unloading arm is butted and fastened with the cryogenic liquid tanker flange, the outer arm 9 swings downwards, the first support plate 7 is fixed, the second support plate 13 is parallel to the first support plate 7, and the vertical pipe 12 connected with the second support plate 13 can be always kept in a horizontal state, so that the cryogenic liquid tanker flange can be butted conveniently. L1 and L2 in FIG. 8 are 1700mm, respectively.

As shown in FIG. 9, when the cryogenic liquid loading and unloading arm is butted and fastened with the cryogenic liquid tanker flange 21, if the cryogenic liquid tanker flange 21 is inclined downwards until the included angle α between the axial direction of the vertical pipe 12 and the transverse direction of the water equipment is 3 degrees, the moment generated by fastening the locking part I16 is larger than the pre-tightening moment of the spring I17 in the bidirectional tension assembly 14, the tension rod 15 moves leftwards in the cylinder 18, as shown in FIG. 10, the bidirectional tension assembly 14 is extended, and the bolt connection of the cryogenic liquid loading and unloading arm and the cryogenic liquid tanker flange is realized, L1 in FIG. 9 is 1700mm, and L2 in FIGS. 9 and 10 is 1715.5 mm.

As shown in FIG. 11, when the cryogenic liquid loading and unloading arm is butted and fastened with the cryogenic liquid tanker flange 21, if the cryogenic liquid tanker flange 21 is inclined upwards to make the included angle α between the axial direction of the vertical pipe 12 and the transverse direction of the water equipment be 3 degrees, then the moment generated by fastening the locking component II 20 is larger than the pre-tightening moment of the spring I19 in the bidirectional tension assembly 14, the tension rod 15 moves to the right in the cylinder 18, as shown in FIG. 12, the bidirectional tension assembly 14 is shortened, and the bolted connection of the cryogenic liquid loading and unloading arm and the cryogenic liquid tanker flange is realized, L1 in FIG. 11 is 1700mm, and L2 in FIGS. 9 and 10 is 1682.8 mm.

The above-mentioned embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements made to the technical solution of the present invention by those skilled in the art without departing from the design spirit of the present invention should fall within the protection scope defined by the claims of the present invention.