Improved pneumatic closed loading arm

Abstract

The utility model discloses an improved pneumatic airtight loading crane pipe which comprises a crane pipe body, an inner wall horizontal rotating mechanism, an outer wall horizontal rotating mechanism and driving mechanisms are arranged on the crane pipe body, and the inner wall horizontal rotating mechanism and the outer wall horizontal rotating mechanism are both connected with a set of driving mechanisms. The driving mechanism is used for driving the inner wall horizontal rotating mechanism and / or the outer wall horizontal rotating mechanism to do horizontal rotating motion so as to adjust the position of the vertical pipe connected with the outer wall horizontal rotating mechanism in the horizontal plane; wherein the driving mechanism comprises a driving air cylinder and a locking assembly, the driving air cylinder is connected with a hand rotating valve, and a piston rod of the driving air cylinder can be driven to stretch out and draw back in the axis direction by rotating the hand rotating valve; the locking assembly comprises a rack pull rod and a locking air cylinder, the locking air cylinder is connected with a hand pulling valve, and a piston rod of the locking air cylinder can be driven to stretch out and draw back in the axis direction by pulling the hand pulling valve. According to the utility model, the vertical pipe can be quickly aligned to the tank car opening, and the working efficiency of vertical pipe alignment is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of crane pipes, in particular to an improved pneumatic closed loading crane pipe. Background Art

[0002] A crane, also known as a liquid loading and unloading arm, is a mechanical device used for loading and unloading liquids. Enclosed loading cranes have been widely used in major oil depots and chemical plants. Cranes have evolved from the earliest common single manual loading cranes to cranes with various superimposed drive devices. These devices drive the inner arm to rotate horizontally relative to the column, the outer arm to rotate horizontally relative to the inner arm, and the outer arm to swing upward and downward relative to the inner arm. Common drive actuators include cylinders and air motors. However, compared to cylinders, air motors have a complex internal structure, a high failure rate, high cost, and are difficult to maintain. Therefore, pneumatic enclosed loading cranes usually adopt a cylinder structure to achieve the crane's three-dimensional motion function, to accommodate the requirements of changing loading positions of tank trucks of different heights during random docking.

[0003] Figure 1 The invention discloses a structural diagram of an existing conventional closed loading crane, which includes a column 100, an inlet flange 200, an air control box 300, an inner arm 400, an outer arm 500, a vertical pipe 600, an inner wall horizontal rotating cylinder 700, an outer wall horizontal rotating cylinder 800 and an outer wall lifting cylinder 900. The inner arm 400 is driven by the inner horizontal rotating cylinder 700 to perform horizontal rotation relative to the column 100, the outer arm 500 is driven by the outer wall horizontal rotating cylinder 800 to perform horizontal rotation relative to the inner arm 400, and the outer wall lifting cylinder 900 is driven to lift the outer arm 500 relative to the inner arm 400. The downward angle is swung to straighten the position of the vertical pipe 600, so that the vertical pipe is aligned with the tank car mouth; however, the inner arm, outer arm and vertical pipe of the existing loading crane pipe generate a large eccentric torque and inertia when they are deployed. The piston rods on the inner wall horizontal rotating cylinder and the outer wall horizontal rotating cylinder are easily extended due to the action of eccentric force and inertia, causing the vertical pipe to drift after alignment (either forward or backward), resulting in the vertical pipe being difficult to stably align with the tank car mouth. The operator needs to frequently operate the inner wall horizontal rotating cylinder and the outer wall horizontal rotating cylinder to adjust the position of the vertical pipe, resulting in low efficiency of the vertical pipe alignment work. Utility Model Content

[0004] In view of the above-mentioned defects or deficiencies in the prior art, it is desired to provide an improved pneumatic closed loading crane pipe so that the vertical pipe can be quickly aligned with the tank car mouth, thereby improving the work efficiency of the vertical pipe alignment.

[0005] The utility model provides an improved pneumatic closed loading crane pipe, comprising a crane pipe body, on which an inner wall horizontal rotation mechanism, an outer wall horizontal rotation mechanism and a driving mechanism are provided, wherein the inner wall horizontal rotation mechanism and the outer wall horizontal rotation mechanism are both connected to a set of the driving mechanisms, and the driving mechanisms are used to drive the inner wall horizontal rotation mechanism and / or the outer wall horizontal rotation mechanism to perform horizontal rotational movement, thereby adjusting the position of the vertical pipe connected to the outer wall horizontal rotation mechanism in the horizontal plane; wherein,

[0006] The driving mechanism includes a driving cylinder and a locking assembly, the piston rod of the driving cylinder is connected to the inner wall horizontal rotation mechanism and / or the outer wall horizontal rotation mechanism, the driving cylinder is connected to a hand-turned valve, and rotating the hand-turned valve can drive the piston rod of the driving cylinder to extend and retract along its axial direction; the locking assembly includes a rack pull rod and a locking cylinder, one end of the rack pull rod is rigidly connected to the piston rod of the driving cylinder, and a side wall of the rack pull rod is provided with a tooth portion along its length direction, the locking cylinder is fixedly connected to the cylinder body of the driving cylinder, and the top of the piston rod of the locking cylinder is provided with a tooth claw that engages with the tooth portion of the rack pull rod, the locking cylinder is connected to a hand-pull valve, and pulling the hand-pull valve can drive the piston rod of the locking cylinder to extend and retract along its axial direction, and the axial direction of the piston rod of the locking cylinder is perpendicular to the length direction of the rack pull rod.

[0007] Preferably, a first rotating seat is provided at one end of the piston rod of the driving cylinder extending to the outside of the cylinder body of the driving cylinder.

[0008] Preferably, a second rotating seat is provided on the cylinder body of the driving cylinder.

[0009] Preferably, a cylinder fixing bracket is fixedly provided on the cylinder body of the driving cylinder, and the cylinder body of the locking cylinder is fixedly connected to the cylinder fixing bracket.

[0010] Preferably, a cavity is provided inside the cylinder fixing frame, and through holes are symmetrically opened on the cylinder fixing frame, the through holes are connected to the cavity, the piston rod of the locking cylinder extends into the cavity, and the rack pull rod slides through the through holes.

[0011] Preferably, the piston rod of the driving cylinder is fixedly connected to the end of the rack pull rod via a connecting plate.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] The inner wall horizontal rotation mechanism and the outer wall horizontal rotation mechanism of the crane pipe of the utility model are each connected to a group of driving mechanisms, and the driving cylinder is driven by operating the hand-turned valve to extend the piston rod of the driving cylinder, thereby driving the corresponding inner wall horizontal rotation mechanism or the outer wall horizontal rotation mechanism to perform horizontal rotation movement, thereby adjusting the position of the vertical pipe in the horizontal plane, and when the piston rod of the driving cylinder is extended, it drives the rack pull rod connected thereto to move synchronously. After the liquid outlet of the vertical pipe is stably aligned with the tank truck port, the hand-pull valve is operated to start the locking cylinder, so that the piston rod of the locking cylinder is extended to the side close to the rack pull rod, so that the tooth claw at its end engages with the tooth part on the rack pull rod, and the tooth claw engages with the tooth part on the rack pull rod to produce a mechanical locking state, thereby locking the extended length of the piston rod of the locking cylinder, preventing the piston rod of the locking cylinder from continuing to extend due to eccentric torque or inertia, thereby keeping the vertical pipe in its aligned position, avoiding drifting after the vertical pipe is aligned, avoiding frequent operation to adjust the position of the vertical pipe, and improving the efficiency of the vertical pipe alignment.

[0014] It should be understood that the contents described in the summary of the utility model are not intended to limit the key or important features of the embodiments of the utility model, nor are they intended to limit the scope of the utility model. Other features of the utility model will become easier to understand through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Other features, objects and advantages of the present invention will become more apparent from the detailed description of the non-limiting embodiments made with reference to the following drawings:

[0016] Figure 1 This is a schematic diagram of the front structure of an existing conventional enclosed loading crane;

[0017] Figure 2 This is a schematic diagram of the top view of the structure of an improved pneumatic closed loading crane pipe of the utility model;

[0018] Figure 3 This is a schematic diagram of the driving mechanism structure of the utility model;

[0019] Numbers in the figure: 1, inner wall horizontal rotation mechanism; 2, outer wall horizontal rotation mechanism; 3, driving mechanism; 4, vertical pipe; 5, column;

[0020] 11. Inner wall; 2. First connecting rod; 13. Second connecting rod; 14. Third connecting rod;

[0021] 21. Outer wall; 22. Fourth connecting rod; 23. Fifth connecting rod; 24. Sixth connecting rod;

[0022] 31. Driving cylinder; 32. Locking assembly; 33. First rotating seat; 34. Second rotating seat; 35. Cylinder fixing bracket; 36. Connecting plate;

[0023] 321, rack pull rod; 322, locking cylinder; 323, tooth claw;

[0024] 100, column; 200, inlet flange; 300, air control box; 400, inner arm; 500, outer arm; 600, vertical pipe; 700, inner wall horizontal rotating cylinder; 800, outer wall horizontal rotating cylinder; 900, outer wall lifting cylinder. DETAILED DESCRIPTION

[0025] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are intended only to illustrate the relevant utility model and are not intended to limit the scope of the utility model. It should also be noted that, for ease of description, only the portions relevant to the utility model are shown in the accompanying drawings.

[0026] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0027] Please refer to Figures 1 to 3 The embodiment of the utility model provides an improved pneumatic closed loading crane, including a crane body, on which an inner wall horizontal rotation mechanism 1, an outer wall horizontal rotation mechanism 2 and a driving mechanism 3 are provided. The inner wall horizontal rotation mechanism 1 and the outer wall horizontal rotation mechanism 2 are both connected to a set of driving mechanisms 3, and the driving mechanisms 3 are used to drive the inner wall horizontal rotation mechanism 1 and / or the outer wall horizontal rotation mechanism 2 to perform horizontal rotation movement, thereby adjusting the position of the vertical pipe 4 connected to the outer wall horizontal rotation mechanism 2 in the horizontal plane;

[0028] Specifically, such as Figure 2 As shown, the improved pneumatic closed loading crane pipe of this application is mainly for Figure 1The conventional closed loading crane pipe shown in the figure has an inner wall horizontal driving cylinder 700 and an outer wall horizontal driving cylinder 800. The remaining structure of the crane pipe of the present application is the same as that of the conventional closed loading crane pipe. The inner wall horizontal rotation mechanism 1 of the improved pneumatic closed loading crane pipe of the present application includes an inner wall 11, a first connecting rod 12, a second connecting rod 13 and a third connecting rod 14. One end of the first connecting rod 12 is rotatably connected to the column 5 through a pin shaft, and the other end is rotatably connected to the second connecting rod 13 through a pin shaft. The other end of the second connecting rod 13 is The outer wall horizontal rotation mechanism 2 of the improved pneumatic closed loading crane pipe of the present application includes an outer wall 21, a fourth link 22, a fifth link 23 and a sixth link 24, and the fourth link 22 is connected to the other end of the inner wall 11 through a pin. The pin is rotatably connected, the other end of the fifth link is rotatably connected to one end of the fifth link 23 through the pin, the other end of the fifth link 23 is rotatably connected to one end of the sixth link 24 through the pin, the other end of the sixth link 24 is connected to the adjustment frame at the end of the outer wall 21, the end of the outer wall 21 is rotatably connected to the other end of the inner wall 11, the other end of the outer wall 21 is connected to the vertical tube 4, the inner wall 11 and the outer wall 21, the fourth link 22, the fifth link 23 and the sixth link 24 are connected in series by the pin to form a shaft with b1, b2, b3, and b4 as the axis. quadrilateral connecting rod motion structure; the inner wall horizontal rotation mechanism 1 is connected to a group of driving mechanisms 3, which are used to drive the first connecting rod 12, the second connecting rod 13 and the fourth connecting rod 14 to move, thereby driving the inner wall 11 to perform horizontal rotation movement relative to the column 5; the outer wall horizontal rotation mechanism 2 is connected to a group of driving mechanisms 3, which are used to drive the fourth connecting rod 22, the fifth connecting rod 23 and the sixth connecting rod 24 to move, thereby driving the outer wall 21 to perform horizontal rotation movement relative to the inner wall 11, thereby adjusting the position of the vertical tube 4 in the horizontal plane.

[0029] Preferably, Figure 3As shown, the driving mechanism 3 includes a driving cylinder 31 and a locking assembly 32. The piston rod of the driving cylinder 31 is connected to the inner wall horizontal rotation mechanism 1 and / or the outer wall horizontal rotation mechanism 2. The driving cylinder 31 is connected to a hand-turned valve. Turning the hand-turned valve can drive the piston rod of the driving cylinder to extend and retract along its axial direction; the locking assembly 32 includes a rack pull rod 321 and a locking cylinder 322. One end of the rack pull rod 321 is rigidly connected to the piston rod of the driving cylinder 31, and the rack pull rod A tooth portion is provided on one side wall of 321 along its length direction. The locking cylinder 322 is fixedly connected to the cylinder body of the driving cylinder 31. A tooth claw 323 is provided on the top of the piston rod of the locking cylinder 322, which is adapted to engage with the tooth portion of the rack pull rod 321. The locking cylinder 322 is connected to a hand-pull valve. Pulling the hand-pull valve can drive the piston rod of the locking cylinder 322 to extend and retract along its axial direction. The axial direction of the piston rod of the locking cylinder 322 is perpendicular to the length direction of the rack pull rod 321.

[0030] Preferably, Figure 2 As shown, a first rotating seat 33 is provided at one end of the piston rod of the driving cylinder 31 extending outside the cylinder body of the driving cylinder; a second rotating seat 34 is provided on the cylinder body of the driving cylinder 31 .

[0031] Specifically, the driving cylinder 31 of the driving mechanism 3 connected to the inner wall horizontal rotation mechanism 1 is rotatably connected to the column 5 via the second rotating seat 34, and the driving cylinder 31 is installed, and the first rotating seat 33 of the driving cylinder is rotatably connected to the rod body of the first connecting rod 12; the driving cylinder 31 of the driving mechanism 3 connected to the outer wall horizontal rotation mechanism 2 is rotatably connected to the inner wall 11 via the second rotating seat 34, and the driving cylinder 31 is installed, and the first rotating seat 33 of the driving cylinder is rotatably connected to the rod body of the fourth connecting rod 22;

[0032] The driving cylinder 31 of the present application adopts the damping cylinder on the market, and the locking cylinder 322 adopts the single-acting spring-type locking cylinder commonly used on the market. The hand-turned valve and the driving cylinder 31 are connected in a conventional and achievable manner, and the hand-pull valve and the locking cylinder 322 are connected in a conventional and achievable manner. Therefore, the internal structure and driving process of the driving cylinder 31 and the locking cylinder 322 are not described in detail here; when the hand-turned valve is turned forward, the piston rod of the driving cylinder 31 is extended, and when the hand-turned valve is turned reversely, the piston rod of the driving cylinder 31 is extended. The piston rod retracts; a spring is provided inside the cylinder body of the single-acting spring-type locking cylinder, and the spring is sleeved on the outside of the piston rod. An air inlet and an exhaust port are provided on the locking cylinder 322. When the hand-pull valve is pulled, air is admitted to the air inlet of the locking cylinder 322, the piston rod retracts, the spring is compressed, and the tooth claw 323 separates from the teeth of the rack pull rod 321; when the hand-pull valve is pressed, the air inlet of the locking cylinder 322 is exhausted outward, the spring is actuated, and under the action of the elastic force, the tooth claw 323 engages with the teeth of the rack pull rod 321;

[0033] An air control box is also provided on the column of the present application, and a control system consisting of a hand-turn valve, a hand-pull valve, a pressure regulating valve, a pressure gauge, a throttle valve and other control elements is provided in the air control box, which is used to control the movement of the driving cylinder 31 and the locking cylinder 32.

[0034] When the inner wall 11 needs to be driven to rotate, the hand valve is pulled up first. After the locking cylinder 322 is energized, the air source overcomes the elastic force of the spring, causing the tooth claw 323 to disengage from the tooth portion of the rack pull rod 321. Subsequently, the hand valve is operated to extend the piston rod of the locking cylinder 31, and the transmission of the first connecting rod 12, the second connecting rod 13 and the fourth connecting rod 14 drives the inner wall 11 to perform horizontal rotational movement with a4 as the axis. When the piston rod of the driving cylinder 31 is extended, the rack pull rod 321 rigidly connected thereto also moves synchronously. After the inner wall 11 rotates to the appropriate position, the hand valve is quickly pressed to cut off the air in the locking cylinder 322. The spring inside the locking cylinder 322 drives the piston rod to extend. Under the action of the elastic force, the tooth claw 323 and the teeth on the rack pull rod 321 The engagement of the parts produces a mechanical locking state, so that the piston rod of the driving cylinder 31 stops extending; similarly, when it is necessary to drive the outer wall 21 to rotate, the driving mechanism 3 in the outer wall rotating mechanism 2 performs the above steps; the driving mechanism 3 drives the outer wall horizontal rotating mechanism 2 and the inner wall horizontal rotating mechanism 2 to rotate, and then drives the vertical pipe 4 to move to a suitable position to align with the tank car mouth. After alignment, the locking cylinder 322 drives the claw 323 to engage with the teeth on the rack pull rod 321 to lock the piston rod of the driving cylinder 31, so as to prevent the piston rod of the driving cylinder 31 from continuing to extend due to eccentric torque or inertia, so that the vertical pipe 4 maintains the position after alignment, avoids the vertical pipe 4 from drifting after alignment, avoids frequent operation to adjust the position of the vertical pipe 4, and improves the efficiency of the alignment of the vertical pipe 4.

[0035] In a preferred embodiment, if Figure 3 As shown, a cylinder fixing bracket 35 is fixedly provided on the cylinder body of the driving cylinder 31, and the cylinder body of the locking cylinder 31 is fixedly connected to the cylinder fixing bracket 35. Specifically, the cylinder fixing bracket 35 is fixedly connected to the cylinder body of the driving cylinder 31 by bolts, and the locking cylinder 31 is installed and fixed by the cylinder fixing bracket 35.

[0036] In a preferred embodiment, if Figure 3 As shown, a cavity is provided inside the cylinder fixing frame 35 , and through holes are symmetrically opened on the cylinder fixing frame 35 , which are connected to the cavity. The piston rod of the locking cylinder 322 extends into the cavity, and the rack pull rod 321 slides through the through hole.

[0037] In a preferred embodiment, if Figure 3As shown, the piston rod of the driving cylinder 31 and the end of the rack pull rod 321 are fixedly connected by a connecting plate 36. Specifically, the end of the rack pull rod 321 is rigidly connected to the piston rod of the driving cylinder 31 through the connecting plate 36, so that the rack pull rod 321 and the piston rod of the driving cylinder 31 can be extended and retracted synchronously.

[0038] In this specification, the terms "connect," "install," and "fix" should be understood broadly. For example, "connect" can refer to a fixed connection, a detachable connection, or an integral connection; it can refer to a direct connection or an indirect connection through an intermediary. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0039] Throughout this specification, terms such as "one embodiment" or "some embodiments" mean that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0040] The above are merely preferred embodiments of the present application and are not intended to limit the present application. Those skilled in the art will readily appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. An improved pneumatic closed loading crane pipe, characterized in that: The crane comprises a main body of a crane, wherein the main body of the crane is provided with an inner wall horizontal rotation mechanism (1), an outer wall horizontal rotation mechanism (2) and a driving mechanism (3), wherein the inner wall horizontal rotation mechanism (1) and the outer wall horizontal rotation mechanism (2) are both connected to a set of the driving mechanisms (3), and the driving mechanisms (3) are used to drive the inner wall horizontal rotation mechanism (1) and / or the outer wall horizontal rotation mechanism (2) to perform horizontal rotation movement, thereby adjusting the position of the vertical pipe (4) connected to the outer wall horizontal rotation mechanism (2) in the horizontal plane; wherein, The driving mechanism (3) includes a driving cylinder (31) and a locking assembly (32), the piston rod of the driving cylinder (31) is connected to the inner wall horizontal rotation mechanism (1) and / or the outer wall horizontal rotation mechanism (2), the driving cylinder (31) is connected to a hand-turned valve, and rotating the hand-turned valve can drive the piston rod of the driving cylinder (31) to extend and retract along its axial direction; the locking assembly (32) includes a rack pull rod (321) and a locking cylinder (322), one end of the rack pull rod (321) is rigidly connected to the piston rod of the driving cylinder (31), and the rack pull rod (321) is rigidly connected to the piston rod of the driving cylinder (31). A toothed portion is provided on one side wall of the rack pull rod (321) along its length direction; the locking cylinder (322) is fixedly connected to the cylinder body of the driving cylinder (31); a toothed claw adapted to mesh with the toothed portion of the rack pull rod (321) is provided on the top of the piston rod of the locking cylinder (322); the locking cylinder (322) is connected to a hand-pull valve; pulling the hand-pull valve can drive the piston rod of the locking cylinder (322) to extend and retract along its axial direction; the axial direction of the piston rod of the locking cylinder (322) is perpendicular to the length direction of the rack pull rod (321).

2. The improved pneumatic closed loading crane according to claim 1 is characterized in that: A first rotating seat (33) is provided at one end of the piston rod of the driving cylinder (31) extending to the outside of the cylinder body of the driving cylinder (31).

3. The improved pneumatic closed loading crane pipe according to claim 2 is characterized in that: A second rotating seat (34) is provided on the cylinder body of the driving cylinder (31).

4. The improved pneumatic closed loading crane pipe according to claim 1 is characterized in that: A cylinder fixing frame (35) is fixedly provided on the cylinder body of the driving cylinder (31), and the cylinder body of the locking cylinder (322) is fixedly connected to the cylinder fixing frame (35).

5. The improved pneumatic closed loading crane pipe according to claim 4 is characterized in that: A cavity is provided inside the cylinder fixing frame (35), and through holes are symmetrically provided on the cylinder fixing frame (35). The through holes are connected to the cavity, and the piston rod of the locking cylinder (322) extends into the cavity, and the rack pull rod (321) slides through the through hole.

6. The improved pneumatic closed loading crane according to claim 1 is characterized in that: The piston rod of the driving cylinder (31) and the end of the rack pull rod (321) are fixedly connected via a connecting plate (36).

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