Cantilever type crane pipe anti-warping self-locking device

Abstract

The utility model relates to the technical field of crane pipes, in particular to a cantilever type crane pipe anti-warping self-locking device which comprises a middle cross arm arranged between a crane pipe inner arm and a crane pipe outer arm, one end of the middle cross arm is fixedly connected with the crane pipe inner arm through a pipeline connector, and the other end of the middle cross arm is rotationally connected with the crane pipe outer arm through a rotating connector. The rotating joint comprises a fixed section adjacent to the middle cross arm and a rotating section adjacent to the crane pipe outer arm, and a coaxial positioning wheel is fixedly mounted on the peripheral side of the fixed section; according to the utility model, through the quick separation mechanism, an operator can synchronously tighten the two steel wire ropes only by pulling the grip with one hand to drive the positioning rod to be quickly separated from the engagement of the positioning wheel, so that the outer arm enters a free swinging state, and the coarse adjustment positioning speed of the vertical pipe is greatly improved; the positioning wheel and the position adjusting rod are automatically kept in a constant meshing state under the pretightening force effect of the strong supporting spring, the self-locking function can be recovered by loosening the grip, and the multiple requirements for rapid adjustment, fine adjustment and stable locking are met.

Description

Technical Field

[0001] This utility model relates to the field of loading arm technology, and in particular to a cantilever loading arm anti-tilting self-locking device. Background Technology

[0002] Cantilever arms are key pieces of equipment in the fluid transport field, widely used in petrochemicals, liquefied gas storage and transportation, and asphalt loading. During loading and unloading operations, the stub at the end of the arm (commonly known as the "beak") must maintain a stable connection with the tanker interface to prevent the stub from accidentally detaching from the tank opening and swinging due to the dynamic pressure generated by the transported medium. Therefore, modern cantilever arms are generally equipped with anti-tilting self-locking devices to ensure operational safety.

[0003] Chinese utility model patent with publication number "CN206476740U" discloses a cantilever loading arm, which has a screw lifting mechanism between the inner and outer arms of the loading arm. The outer arm of the loading arm is controlled to move down or up by manually turning the screw. Although it has advantages such as simple structure and reliable self-locking, manually turning the screw causes the vertical pipe positioning speed to be slow, prolongs the docking time of the tank truck, and affects the overall loading and unloading efficiency. Utility Model Content

[0004] The technical problem to be solved by this utility model is to address the shortcomings of the existing technology by providing an anti-tilting self-locking device for loading arms that takes into account the positioning accuracy, positioning speed and self-locking stability, and can effectively improve the efficiency of loading and unloading operations.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A cantilevered loading arm anti-tilting self-locking device includes an intermediate cross arm disposed between the inner arm and the outer arm of the loading arm. One end of the intermediate cross arm is fixedly connected to the inner arm of the loading arm via a pipe joint, and the other end of the intermediate cross arm is rotatably connected to the outer arm of the loading arm via a rotary joint. Its features are:

[0007] The rotary joint includes a fixed section adjacent to the middle cross arm and a rotating section adjacent to the outer arm of the loading arm. A coaxial positioning wheel is fixedly installed on the outer periphery of the fixed section, and a transmission component A is fixedly provided on the outer periphery of the positioning wheel.

[0008] A support plate is fixedly installed at the bottom of one end of the arm of the loading arm near the positioning wheel. Mounting brackets are fixedly installed on the upper surface of the support plate and on the left and right sides of the bottom of the positioning wheel. Each mounting bracket has a lifting groove along the height direction. A lifting block is slidably installed in each lifting groove. An adjusting rod that cooperates with the positioning wheel is rotatably installed between two lifting blocks. A transmission component B is fixedly installed on the outer circumference of the adjusting rod. A strong support spring is installed between the bottom surface of each lifting block and the bottom of the corresponding lifting groove to abut the transmission component B against the transmission component A to maintain the meshing transmission state.

[0009] A movable separation mechanism is provided on the outer arm of the loading arm for pulling the adjustment rod to disengage the transmission component B from the transmission component A.

[0010] The technical problem to be solved by this utility model can be further achieved through the following steps: the transmission component A is specifically a worm gear, the transmission component B is specifically a worm tooth, and the adjusting rod is perpendicular to the radial direction of the positioning wheel.

[0011] The technical problem to be solved by this utility model can be further achieved through the following steps: the left end of the adjusting rod passes through the rotating block and is fixedly connected to a handwheel that is easy for a person to rotate.

[0012] The technical problem to be solved by this utility model can be further achieved through the following steps: the bottom surface of each lifting block is fixedly connected with a pull rod that extends through to the bottom of the support plate; the movable separation mechanism includes two steel wire ropes fixedly connected to the two pull rods respectively, a guide wheel installed at the bottom of the support plate to change the direction of movement of the steel wire ropes, a grip frame fixedly installed on the outer arm of the loading arm, and a movable handle slidably installed in the grip frame and fixedly connected to the right end of the two steel wire ropes.

[0013] The technical problem to be solved by this utility model can be further achieved through the following steps: there are two guide wheels, which are respectively set on the right side of the lower end of the two pull rods. Each guide wheel has two grooves, and the distance between the bottom of the groove of each guide wheel and the rotation axis of the guide wheel is equal to the distance between the rotation axis of the guide wheel and the axis of the corresponding pull rod.

[0014] The technical problem to be solved by this utility model can be further achieved through the following steps: the movable separation mechanism also includes a labor-saving component disposed between the support plate and the grip frame; the labor-saving component includes a linear slide rail fixedly installed at the bottom of the outer arm of the loading arm, a fixed pulley fixedly installed at one end of the linear slide rail, and a movable pulley slidably installed on the linear slide rail via a slider; the right end of the wire rope passes around the fixed pulley and the movable pulley in sequence, and is finally fixedly connected to the movable handle.

[0015] The technical problem to be solved by this utility model can be further achieved through the following steps: a connecting plate is fixedly installed on the intermediate cross arm, and a balance cylinder is rotatably installed on one side of the outer arm of the loading arm, with the piston end of the balance cylinder rotatably connected to the connecting plate.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows: Through the quick separation mechanism, the operator only needs to pull the handle with one hand to simultaneously tighten the two steel wire ropes, causing the adjustment rod to quickly disengage from the positioning wheel, allowing the outer arm to enter a free swinging state, which greatly improves the coarse adjustment positioning speed of the vertical tube; the positioning wheel and the adjustment rod automatically maintain a constant engagement state under the pre-tension of the strong support spring, and the self-locking function can be restored by releasing the handle, taking into account the multiple needs of rapid adjustment, fine adjustment and stable locking. Attached Figure Description

[0017] Figure 1 This is an installation diagram of the present invention;

[0018] Figure 2 This is a schematic diagram of the structure of this utility model;

[0019] Figure 3 for Figure 2 Enlarged view of point A;

[0020] Figure 4 This is a schematic diagram of the guide wheel structure;

[0021] Figure 5 This is a schematic diagram showing the installation position of the guide wheel;

[0022] In the diagram: 1. Inner arm of loading arm; 2. Outer arm of loading arm; 3. Rotary joint; 4. Positioning wheel; 41. Worm gear; 5. Support plate; 6. Mounting bracket; 7. Lifting block; 8. Adjusting rod; 81. Worm gear; 9. Strong support spring; 10. Handwheel; 11. Pull rod; 12. Wire rope; 13. Guide wheel; 13. Wheel groove; 14. Grip frame; 15. Moving handle; 16. Straight slide; 17. Fixed pulley; 18. Slider; 19. Moving pulley; 20. Connecting plate; 21. Balance cylinder. Detailed Implementation

[0023] The specific technical solutions of this utility model are further described below to enable those skilled in the art to further understand this utility model, without constituting a limitation on its rights.

[0024] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the utility model.

[0025] Please refer to Figure 1-5A cantilever loading arm anti-tilting self-locking device includes an intermediate cross arm disposed between the inner arm 1 and the outer arm 2 of the loading arm. One end of the intermediate cross arm is fixedly connected to the inner arm 1 of the loading arm via a pipe joint, and the other end of the intermediate cross arm is rotatably connected to the outer arm 2 of the loading arm via a rotary joint 3. The above-mentioned components and structures are all prior art in this field and will not be described in detail further.

[0026] The rotary joint 3 includes a fixed section adjacent to the middle cross arm and a rotating section adjacent to the outer arm 2 of the loading arm. A coaxial positioning wheel 4 is fixedly installed on the outer periphery of the fixed section, and a transmission component A is fixedly provided on the outer periphery of the positioning wheel 4.

[0027] A support plate 5 is fixedly installed at the bottom of one end of the arm of the loading arm 2 near the positioning wheel 4. The support plate 5 is fixedly welded to the arm of the loading arm 2 by vertical ribs. Mounting brackets 6 are fixedly installed on the upper surface of the support plate 5 and on the left and right sides of the bottom of the positioning wheel 4. Each mounting bracket 6 has a lifting groove opened along the height direction. A lifting block 7 is slidably installed in each lifting groove. An adjusting rod 8 that cooperates with the positioning wheel 4 is rotatably set between two lifting blocks 7. A transmission component B is fixedly set on the outer circumference of the adjusting rod 8. A strong support spring 9 is set between the bottom surface of each lifting block 7 and the bottom of the corresponding lifting groove to abut the transmission component B against the transmission component A to maintain the meshing transmission state.

[0028] A movable separation mechanism is provided on the outer arm 2 of the loading arm for pulling the adjustment rod 8 so that the transmission component B is disengaged from the transmission component A.

[0029] The transmission component A is specifically a worm gear tooth 41, and the transmission component B is specifically a worm tooth 81. The axial direction of the adjusting rod 8 is perpendicular to the radial direction of the positioning wheel 4 to ensure that the worm gear tooth 41 and the worm tooth 81 maintain normal meshing.

[0030] The left end of the adjustment rod 8 passes through the rotating block and is fixedly connected to a handwheel 10 that is easy for a person to turn. The height of the outer arm 2 of the loading arm can be finely adjusted by turning the handwheel 10.

[0031] Each lifting block 7 has a fixedly connected pull rod 11 extending through to the bottom of the support plate 5. The movable separation mechanism includes two steel wire ropes 12 fixedly connected to the two pull rods 11 respectively, a guide wheel 13 installed at the bottom of the support plate 5 to change the direction of movement of the steel wire ropes 12, a grip frame 14 fixedly installed on the outer arm 2 of the loading arm, and a movable handle 15 slidably installed in the grip frame 14 and fixedly connected to the right end of the two steel wire ropes 12. Thus, through the coordinated action of the steel wire ropes 12, the guide wheel 13 and the movable handle 15, the adjustment rod 8 can be quickly separated, allowing the device to quickly enter a free adjustment state and improving operating efficiency.

[0032] There are two guide wheels 13, which are respectively set on the right side of the lower end of the two pull rods 11. Each guide wheel 13 has two grooves 131, and the distance L between the bottom of the groove 131 of each guide wheel 13 and the rotation axis of the guide wheel 13 is equal to the distance R between the rotation axis of the guide wheel 13 and the axis of the corresponding pull rod 11. Figure 5 This allows the wire rope 12 to form a 90° wrap angle, ensuring that the direction of the tension force on the tie rod 11 coincides with its axial direction, thereby improving stability.

[0033] The movable separation mechanism also includes a force-saving component disposed between the support plate 5 and the grip frame 14. The force-saving component includes a linear slide 16 fixedly installed at the bottom of the arm 2 of the loading arm. A fixed pulley 17 is fixedly installed at one end of the linear slide 16, and a movable pulley 19 is slidably installed on the linear slide 16 via a slider 18. The right end of the wire rope 12 passes sequentially around the fixed pulley 17 and the movable pulley 19, and is finally fixedly connected to the moving handle 15. Through the force-saving principle of the pulley system, the force-saving component significantly reduces the force required for the operator to pull the moving handle 15, making the device operation easier and more labor-saving, and improving the user experience.

[0034] A connecting plate 20 is fixedly installed on the intermediate cross arm, and a balance cylinder 21 is rotatably installed on one side of the outer arm 2 of the loading arm. The piston end of the balance cylinder 21 is rotatably connected to the connecting plate 20, providing additional support force for the outer arm 2 of the loading arm, reducing the stress on the rotary joint 3, and maintaining the stability of the device.

[0035] Working Principle: When using this invention, the operator holds the grip frame 14 and pulls the moving handle 15 backward. The steel wire rope 12, after being turned by the guide wheel 13, simultaneously pulls the pull rods 11 on both sides downward. The pull rods 11 drive the lifting block 7 downward along the lifting groove of the mounting frame 6, compressing the strong support spring 9, causing the worm gear 81 on the adjusting rod 8 to completely disengage from the worm wheel gear 41 of the positioning wheel 4. At this time, the rotating section and fixed section of the rotary joint 3 are released from constraint, and the operator can freely drag the arm of the loading arm 2 to the target position. Then, the moving handle 15 is released, and the strong support spring 9 pushes the lifting block 7 to reset, restoring the meshing of the worm gear 81 and the worm wheel gear 41. At this time, the adjusting rod 8 can be driven by rotating the handwheel 10, allowing the arm of the loading arm 2 to make precise pitch angle adjustments around the axis of the rotary joint 3.

[0036] This utility model, through a quick separation mechanism, allows the operator to simultaneously tighten the two steel wire ropes 12 by pulling the handle with one hand, causing the adjusting rod 8 to quickly disengage from the positioning wheel 4, allowing the outer arm to enter a free swinging state, which greatly improves the coarse adjustment positioning speed of the vertical tube; the positioning wheel 4 and the adjusting rod 8 automatically maintain a constant engagement state under the pre-tension of the strong support spring 9, and the self-locking function can be restored by releasing the handle, taking into account multiple needs such as rapid adjustment, fine adjustment and stable locking.

[0037] Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

Claims

1. A cantilevered loading arm anti-tilting self-locking device, comprising an intermediate cross arm disposed between the inner arm and the outer arm of the loading arm, one end of the intermediate cross arm being fixedly connected to the inner arm of the loading arm via a pipe joint, and the other end of the intermediate cross arm being rotatably connected to the outer arm of the loading arm via a rotary joint, characterized in that: The rotary joint includes a fixed section adjacent to the middle cross arm and a rotating section adjacent to the outer arm of the loading arm. A coaxial positioning wheel is fixedly installed on the outer periphery of the fixed section, and a transmission component A is fixedly provided on the outer periphery of the positioning wheel. A support plate is fixedly installed at the bottom of one end of the arm of the loading arm near the positioning wheel. Mounting brackets are fixedly installed on the upper surface of the support plate and on the left and right sides of the bottom of the positioning wheel. Each mounting bracket has a lifting groove along the height direction. A lifting block is slidably installed in each lifting groove. An adjusting rod that cooperates with the positioning wheel is rotatably installed between two lifting blocks. A transmission component B is fixedly installed on the outer circumference of the adjusting rod. A strong support spring is installed between the bottom surface of each lifting block and the bottom of the corresponding lifting groove to abut the transmission component B against the transmission component A to maintain the meshing transmission state. A movable separation mechanism is provided on the outer arm of the loading arm for pulling the adjustment rod to disengage the transmission component B from the transmission component A.

2. The cantilever loading arm anti-tilting self-locking device according to claim 1, characterized in that: The transmission component A is specifically a worm gear, the transmission component B is specifically a worm tooth, and the adjusting rod is perpendicular to the radial direction of the positioning wheel.

3. The cantilever loading arm anti-tilting self-locking device according to claim 2, characterized in that: The left end of the adjusting rod passes through the rotating block and is fixedly connected to a handwheel that is easy for a person to turn.

4. The cantilever loading arm anti-tilting self-locking device according to claim 2, characterized in that: Each lifting block has a fixed pull rod that extends through to the bottom of the support plate. The movable separation mechanism includes two steel wire ropes fixedly connected to the two pull rods respectively, a guide wheel installed at the bottom of the support plate to change the direction of the steel wire rope movement, a grip frame fixedly installed on the outer arm of the loading arm, and a movable handle slidably installed in the grip frame and fixedly connected to the right end of the two steel wire ropes.

5. The cantilever loading arm anti-tilting self-locking device according to claim 4, characterized in that: There are two guide wheels, which are respectively set on the right side of the lower end of the two tie rods. Each guide wheel has two grooves, and the distance between the bottom of the groove of each guide wheel and the rotation axis of the guide wheel is equal to the distance between the rotation axis of the guide wheel and the axis of the corresponding tie rod.

6. The cantilever loading arm anti-tilting self-locking device according to claim 4, characterized in that: The movable separation mechanism also includes a labor-saving component disposed between the support plate and the grip frame; the labor-saving component includes a linear slide rail fixedly installed at the bottom of the outer arm of the loading arm, a fixed pulley fixedly installed at one end of the linear slide rail, and a movable pulley slidably installed on the linear slide rail via a slider, the right end of the wire rope passing through the fixed pulley and the movable pulley in sequence, and finally being fixedly connected to the movable handle.

7. The cantilever loading arm anti-tilting self-locking device according to claim 4, characterized in that: A connecting plate is fixedly installed on the intermediate cross arm, and a balance cylinder is rotatably installed on one side of the outer arm of the loading arm. The piston end of the balance cylinder is rotatably connected to the connecting plate.

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