Pipeline aircraft refueling truck lift platform

Abstract

The pipeline airplane refueling truck lifting platform discloses a pipeline airplane refueling truck lifting platform and belongs to the technical field of airplane refueling equipment, and comprises a base, a scissor frame, an operation platform, a lifting cylinder for driving the scissor frame to stretch out and retract, and a positioning assembly, wherein the positioning assembly comprises a pawl, a rack and a driving piece, the pawl is arranged at the bottom of the scissor frame, the base is provided with the rack along the extending direction of the base, and the scissor frame is provided with the driving piece in transmission connection with the pawl. The positioning assembly can effectively prevent the scissor frame from being accidentally retracted and causing the operation platform to fall, and provides reliable safety guarantee for the refueling operation of the operator, and can avoid the damage of the refueling equipment caused by the falling of the operation platform. The mechanical engagement of the pawl and the rack and the pure mechanical transmission of the driving piece can realize the anti-falling limiting, and no electrical element is involved, so that the safety hazard of electric spark generated by the electrical equipment in the oil and gas rich refueling operation environment is eliminated, and the strict requirement of the airplane refueling truck on the explosion-proof performance is completely met.

Description

Technical Field

[0001] This utility model relates to the field of aircraft refueling equipment technology, and in particular to a pipeline aircraft refueling truck lifting platform. Background Technology

[0002] The aircraft refueling truck lifting platform is a key piece of equipment in aviation ground refueling operations. It primarily supports operators and refueling pipelines, adapting to different aircraft types and altitudes for refueling interfaces. It provides a stable operating base for aircraft refueling operations, ensuring the convenience and continuity of these operations. Due to the unique environment of aircraft refueling operations, where oil and gas mixtures are common, the lifting platform must not only meet basic functions such as height adjustment and load-bearing support, but also possess extremely high safety protection performance to cope with various risks in complex operating environments.

[0003] The applicant obtained the following prior art through a search, specifically, patent CN207242068U discloses a special lifting platform for aircraft refueling trucks, including a base, a scissor lift, a landing fluid cylinder, and an operating platform. The lower end of the scissor lift is connected to the base, and the upper end is connected to the operating platform. The piston rod of the landing fluid cylinder is connected to the scissor lift, and the landing fluid cylinder is connected to a hydraulic oil tank through an oil circuit. The platform lifting and all operations are all pneumatically controlled, relying on the operation of pneumatic valves to control the landing fluid cylinder, achieving lifting and lowering actions through pneumatic-controlled hydraulics. Emergency descent valves are installed at both the upper and lower parts of the platform to achieve emergency descent of the platform through pneumatic-controlled hydraulics. A pneumatic anti-collision device is installed at the top of the platform. When the platform rises to the point where the anti-collision probe touches the aircraft, the pneumatic anti-collision device cuts off the air circuit of the hydraulic valve, stops the oil supply to the landing fluid cylinder, and stops the platform from rising. This utility model adopts a fully pneumatic and hydraulic control method, avoiding the safety hazards of using electrical control methods, and also saving the series of high costs of electrical explosion-proof safety designs, effectively improving the overall safety performance of the vehicle.

[0004] As can be seen from the patent above, although this special lifting platform for aircraft refueling trucks avoids the safety hazards of using electrical control methods by adopting pneumatic and hydraulic control methods, and also saves the series of high costs of electrical explosion-proof safety design, effectively improving the overall safety performance of the vehicle, in actual use, due to the lack of independent anti-fall measures, if there is a sudden failure such as hydraulic oil circuit leakage or cylinder seal failure, the lifting platform is prone to accidental fall, thus failing to provide reliable safety protection, threatening the personal safety of operators, and also easily causing collision damage to refueling equipment. Utility Model Content

[0005] The main purpose of this utility model is to overcome the defects of the existing technology and provide a pipeline aircraft refueling truck lifting platform with a purely mechanical anti-fall design that can lock the platform in the event of hydraulic system failure, thereby ensuring the safety of operators and equipment.

[0006] To achieve the above objectives, this utility model provides a pipeline aircraft refueling truck lifting platform, including a base, a scissor lift, an operating platform, and a landing cylinder for driving the extension and retraction of the scissor lift. The bottom of the scissor lift is connected to the base, and the top is connected to the operating platform. It also includes a positioning component, which includes a pawl, a rack, and a drive component. The pawl is located at the bottom of the scissor lift, and the rack is provided on the base along its extension direction. The drive component, which is pulsatorically connected to the pawl, is provided on the scissor lift. The pawl engages or disengages from the rack through the drive component, forming a purely mechanical anti-fall limit on the operating platform.

[0007] Preferably, it further includes a support and a connecting rod, the support being detachably connected to the power output end of the drive member, the connecting rod being provided on the support, the pawl being rotatably mounted on the scissor lift, and the end of the connecting rod away from the support being detachably connected to the pawl.

[0008] Preferably, the axis of engagement between the pawl and the tooth groove of the rack is coaxial and collinear with the axis of the scissor lift.

[0009] Preferably, the end of the pawl that extends into the tooth groove of the rack has a ramp, which is used to abut against the side wall of the tooth groove of the rack.

[0010] Preferably, the scissor lift includes two sets of rotatably connected first and second rods. One end of each of the first and second rods is hinged to the base and the operating platform, respectively, and the other end is provided with a roller that engages with the operating platform and the base, as well as the positioning component.

[0011] Preferably, the base is provided with a plurality of support columns spaced apart along its circumference for supporting the operating platform, and the top of the plurality of support columns is provided with pads.

[0012] Beneficial effects: 1. This utility model provides a pipeline aircraft refueling truck lifting platform that, through its positioning components, can effectively prevent the scissor lift from accidentally retracting due to loss of support from the landing cylinder, thus preventing the operating platform from falling. This provides reliable safety for the refueling operations of the operators and avoids damage to the refueling equipment caused by the operating platform falling. It is reliable in use.

[0013] 2. The lifting platform of this utility model for a pipeline aircraft refueling truck achieves anti-fall limit only through the mechanical engagement of pawl and rack and the pure mechanical transmission of the drive component. No electrical components are involved in the entire process, which completely eliminates the safety hazard of electrical equipment generating electric sparks in the oil and gas rich refueling operation environment, and fully meets the stringent requirements of aircraft refueling trucks for explosion-proof performance.

[0014] 3. The positioning component of the lifting platform of the pipeline aircraft refueling truck of this utility model is independent of the hydraulic drive system of the landing cylinder. Even if the hydraulic oil circuit leaks or the cylinder seal fails, the anti-fall function can still be stably effective by mechanical engagement. This not only avoids the damage to personnel and equipment caused by the accidental fall of the operating platform, but also eliminates the need for additional electrical explosion-proof structure design. While ensuring safety, it simplifies the overall design of the equipment and adapts to the special safety requirements of aviation refueling operations. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of a pipeline aircraft refueling truck lifting platform according to an embodiment of the present invention; Figure 2 yes Figure 1 A magnified view of a portion of point A in the middle.

[0017] In the diagram: 1-base; 2-scissor lift; 3-operating platform; 4-pawl; 5-rack; 6-drive component; 7-support; 8-link; 9-slope; 10-first link; 11-second link; 12-support column. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0019] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0020] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0021] In the description of this application, it should be noted that the use of terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" to indicate orientation or positional relationships is based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationships commonly used when the product is in use. These terms are used solely for the convenience of describing this application and for 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 this application. Furthermore, the use of terms such as "first" and "second" in the description of this application is only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0022] Furthermore, the use of terms such as "horizontal" and "vertical" in the description of this application does not imply that the component is required to be absolutely horizontal or suspended, but rather that it may be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but rather that it may be slightly tilted.

[0023] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0024] Example 1: This utility model proposes a lifting platform for pipeline aircraft refueling trucks.

[0025] In one embodiment of this utility model, a pipeline aircraft refueling truck lifting platform includes a base 1, a scissor lift 2, an operating platform 3, and a landing cylinder for driving the extension and retraction of the scissor lift 2. The bottom of the scissor lift 2 is connected to the base 1, and the top is connected to the operating platform 3. It also includes a positioning component, which includes a pawl 4, a rack 5, and a drive component 6. The pawl 4 is disposed at the bottom of the scissor lift 2, and the rack 5 is disposed on the base 1 along its extension direction. The drive component 6 is disposed on the scissor lift 2 and is connected to the pawl 4 in a transmission manner. The pawl 4 engages or disengages from the rack 5 through the drive component 6 and forms a purely mechanical anti-fall limit for the operating platform 3.

[0026] Specifically, such as Figure 1 and Figure 2 As shown, in the pipeline aircraft refueling truck lifting platform of this utility model, the bottom of the scissor lift 2 is stably connected to the base 1, and the top is connected to the operating platform 3, thereby ensuring the load-bearing stability of the operating platform 3 during the lifting process. The lifting and lowering cylinder realizes the extension and retraction of the scissor lift 2 according to conventional drive logic, thereby driving the operating platform 3 to complete the lifting action, meeting the adaptation requirements of refueling operations at different heights. In addition, the specific connection method between the scissor lift 2, the base 1, and the operating platform 3 is a mature and conventional existing technology, which will not be described in detail here.

[0027] Furthermore, since the pawl 4 in the positioning component is fixedly set at the bottom of the scissor lift 2, and the rack 5 is laid on the base 1 along its extension direction, the extension trajectory of the rack 5 matches the movement path of the bottom of the scissor lift 2. At the same time, the scissor lift 2 is equipped with a drive component 6 that is connected to the pawl 4 for transmission. The drive component 6 can be a cylinder or a hydraulic cylinder, etc., so that the engagement or disengagement state of the pawl 4 and the rack 5 can be precisely controlled by the action of the drive component 6, thereby forming a fall prevention and limiting mechanism for the purely mechanical structure of the operating platform 3.

[0028] Understandably, when the operating platform 3 is in normal rising position, the drive component 6 drives the pawl 4 to disengage from the tooth groove of the rack 5, thereby preventing the pawl 4 from obstructing or interfering with the extension and retraction movement of the scissor lift 2, thus ensuring the smoothness of the lifting and lowering action of the operating platform 3. When the operating platform 3 rises to the target working height, the drive component 6 actuates to drive the pawl 4 into the tooth groove of the rack 5 and form a stable engagement. At this time, even if there is a sudden failure such as hydraulic oil circuit leakage or cylinder seal failure, the mechanical engagement between the pawl 4 and the rack 5 can lock the scissor lift 2, thereby effectively preventing the scissor lift 2 from accidentally retracting due to the loss of support from the lifting and lowering cylinder and causing the operating platform 3 to fall. This provides reliable safety for the operator's refueling operation and can prevent the operating platform 3 from falling and damaging the refueling equipment, making it reliable in use. Furthermore, it is evident that the lifting platform of this utility model for a pipeline aircraft refueling truck achieves anti-fall limiting solely through the mechanical engagement of the pawl 4 and rack 5 and the pure mechanical transmission of the drive component 6, without any electrical components involved throughout the process. This completely eliminates the safety hazard of electrical equipment generating electric sparks in the oil and gas-rich refueling environment, fully meeting the stringent requirements for explosion-proof performance of aircraft refueling trucks. At the same time, this purely mechanical anti-fall structure is independent of the hydraulic drive system of the landing cylinder. Even if the hydraulic oil circuit leaks or the cylinder seal fails, the anti-fall function can still be stably effective through mechanical engagement. This not only avoids damage to personnel and equipment caused by accidental falls of the operating platform 3, but also eliminates the need for additional electrical explosion-proof structures. While ensuring safety, it simplifies the overall design of the equipment and adapts to the special safety requirements of aviation refueling operations.

[0029] In one embodiment, it further includes a support 7 and a connecting rod 8. The support 7 is detachably connected to the power output end of the drive member 6. The connecting rod 8 is provided on the support 7. The pawl 4 is rotatably mounted on the scissor lift 2, and the end of the connecting rod 8 away from the support 7 is detachably connected to the pawl 4. Specifically, as shown... Figure 1 and Figure 2 As shown, the detachable connection between the support 7 and the power output end of the drive component 6 can be achieved through threaded connections, facilitating the disassembly, replacement, and maintenance of either the support 7 or the drive component 6. Furthermore, when the drive component 6 is running, the linear extension and retraction motion of the drive component 6 can be smoothly converted into the rotational motion of the pawl 4 through the coordinated transmission of the support 7 and the connecting rod 8. This effectively avoids jamming or misalignment of the pawl 4 during power transmission, ensuring precise and controllable engagement timing and position between the pawl 4 and the rack 5, further enhancing the reliability of the purely mechanical fall protection mechanism.

[0030] In one embodiment, such as Figure 1 and Figure 2 As shown, the axis of engagement between the pawl 4 and the toothed groove of the rack 5 is coaxial and collinear with the axis of the scissor lift 2. Understandably, when the pawl 4 extends into the toothed groove of the rack 5 to form an engagement, the axis of the pawl 4 remains coaxial and collinear with the axis of the scissor lift 2, thereby enhancing the load-bearing reliability of the purely mechanical anti-fall mechanism. Especially in extreme scenarios such as hydraulic circuit leakage or cylinder seal failure, the coaxial and collinear force-bearing structure ensures that the engagement between the pawl 4 and the rack 5 remains secure and does not deform, maintaining a good locking effect on the scissor lift 2 at all times.

[0031] In one embodiment, the end of the pawl 4 that extends into the tooth groove of the rack 5 has a ramp 9, which is used to abut against the sidewall of the tooth groove of the rack 5. Specifically, as shown... Figure 2 As shown, when the pawl 4 extends into the tooth groove of the rack 5 to form a locking engagement, the ramp 9 can increase the contact area between the pawl 4 and the tooth groove of the rack 5, thereby improving the stability and reliability of the locking engagement between the pawl 4 and the tooth groove of the rack 5.

[0032] In one embodiment, the scissor lift 2 includes two sets of rotatably connected first rods 10 and second rods 11. One end of each first rod 10 and second rod 11 is hinged to the base 1 and the operating platform 3, respectively, and the other end is respectively provided with rollers and positioning components that engage with the operating platform 3 and the base 1. Specifically, as shown... Figure 1As shown, the two sets of rotatingly connected first rods 10 and second rods 11 can form a symmetrical scissor lift structure, which can significantly improve the overall rigidity and load-bearing capacity of the scissor lift 2. That is, the two sets of symmetrically distributed first rods 10 and second rods 11 can evenly transfer the load of the operating platform 3 to the base 1, thereby avoiding deformation or shaking caused by overload of a single rod, ensuring that the operating platform 3 always remains horizontal during the lifting process, providing a stable foundation for the precise engagement of the pawl 4 and the rack 5 in the positioning component, and preventing the pawl 4 from deviating from the tooth groove of the rack 5 due to the shaking of the operating platform 3, further ensuring the reliability of the fall protection function.

[0033] Furthermore, by setting positioning components in the two sets of first rods 10 and second rods 11 respectively, multi-point anti-fall limiting can be achieved for the operating platform 3. On the one hand, multiple positioning components are symmetrically distributed along the bottom of the scissor lift 2, and each positioning component independently achieves the locking of the pawl 4 and the rack 5. When one positioning component fails due to an accident, such as the pawl 4 getting stuck or the drive component 6 temporarily failing, the remaining positioning components can still maintain a stable lock with the rack 5, effectively preventing the scissor lift 2 from tilting or falling due to partial unlocking, and completely eliminating the safety hazards caused by single-point failure. On the other hand, the symmetrically distributed multiple positioning components can evenly distribute the load of the operating platform 3, such as the weight of the operator and the weight of the refueling pipeline, to multiple locking points, thereby avoiding the overload deformation of the pawl 4 and the damage to the tooth groove of the rack 5 caused by a single positioning component bearing the entire weight, thus extending the service life.

[0034] In one embodiment, a plurality of support columns 12 for supporting the operating platform 3 are arranged at circumferential intervals on the base 1, and pads are provided on the top of the plurality of support columns 12. Specifically, as shown in the figure... Figure 1 As shown, when the scissor lift 2 is in the folded and stowed state, the operating platform 3 can be supported at multiple points by several support columns 12. A pad, made of flexible material, can replace the support columns 12 in contact with the operating platform 3, thus absorbing the impact force when the operating platform 3 descends and preventing debris and sparks from direct metal-to-metal collisions. This fully meets the explosion-proof requirements of the refueling environment of a refueling truck, while also reducing wear on the operating platform 3 and the scissor lift 2, extending the service life of the equipment. Simultaneously, the support columns 12 ensure that the operating platform 3 remains horizontal at its lowest position, preventing deformation due to unilateral force. The stability of the flatness of the operating platform 3 directly guarantees the installation accuracy of the scissor lift 2 and the positioning components, ensuring that the engagement between the pawl 4 and the rack 5 is always precise and reliable during subsequent lifting and lowering. The structural design is simple and reasonable.

[0035] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A lifting platform for a pipeline aircraft refueling truck, comprising a base (1), a scissor lift (2), an operating platform (3), and a landing cylinder for driving the extension and retraction of the scissor lift (2), wherein the bottom of the scissor lift (2) is connected to the base (1), and the top is connected to the operating platform (3), characterized in that: It also includes a positioning component, which includes a pawl (4), a rack (5) and a drive member (6). The pawl (4) is located at the bottom of the scissor lift (2). The rack (5) is provided on the base (1) along its extension direction. The drive member (6) is provided on the scissor lift (2) and is connected to the pawl (4) in a transmission manner. The pawl (4) engages or disengages from the rack (5) through the drive member (6) and forms a purely mechanical anti-fall limit for the operating platform (3).

2. The pipeline aircraft refueling truck lifting platform according to claim 1, characterized in that, It also includes a support (7) and a connecting rod (8). The support (7) is detachably connected to the power output end of the drive unit (6). The connecting rod (8) is provided on the support (7). The pawl (4) is rotatably mounted on the scissor lift (2), and the end of the connecting rod (8) away from the support (7) is detachably connected to the pawl (4).

3. The pipeline aircraft refueling truck lifting platform according to claim 2, characterized in that, When the pawl (4) engages with the tooth groove of the rack (5), the axis of the pawl (4) is coaxial and collinear with the axis of the scissor lift (2).

4. The pipeline aircraft refueling truck lifting platform according to claim 3, characterized in that, The pawl (4) extends into the tooth groove of the rack (5) and forms a ramp (9), which is used to abut against the side wall of the tooth groove of the rack (5).

5. A pipeline aircraft refueling truck lifting platform according to any one of claims 1-4, characterized in that, The scissor lift (2) includes two sets of rotatably connected first rods (10) and second rods (11). One end of the two first rods (10) and second rods (11) is hinged to the base (1) and the operating platform (3) respectively, and the other end is provided with rollers that engage with the operating platform (3) and the base (1) and the positioning component respectively.

6. A pipeline aircraft refueling truck lifting platform according to any one of claims 1-4, characterized in that, The base (1) is provided with a plurality of support columns (12) spaced along its circumference for supporting the operating platform (3), and the top of the plurality of support columns (12) is provided with pads.

Images