Liquid supplementing pipe for self-propelled aviation oil filling equipment
By combining a rigid inner liner tube with an outer cover tube and incorporating a conductive strip, the problems of poor controllability and electrostatic safety hazards during the fuel replenishment process were solved, achieving efficient and safe aviation fuel refueling.
Patent Information
- Application Number
- CN202423213238.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-25
- Publication Date
- 2025-10-21
- Estimated Expiration
- 2034-12-25
AI Technical Summary
The refueling pipes of existing self-propelled aviation fuel filling equipment have poor controllability during the oil extraction process and pose safety hazards, especially electric sparks and frictional heat caused by static electricity.
It adopts a structure of rigid inner liner tube (such as stainless steel) and outer cover tube (such as chlorinated polyethylene). The inner liner tube is partially wrapped inside the outer cover tube. The braided reinforcement layer and the inner rubber layer are sandwiched with conductive strips to ensure static electricity discharge. The joint is designed as a threaded joint.
It improves the controllability and oil extraction efficiency of the filling pipe, reduces the risk of static electricity, and ensures the safety of the filling process and the flexibility of the connection.
Smart Images
Figure CN223460049U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of aviation oil filling, in particular to a liquid supplementing pipe for a self-propelled aviation oil filling device. BACKGROUND
[0002] Aviation oil is a kind of fuel specially designed for aircraft, which belongs to a derivative of petroleum and is mainly composed of different distillate hydrocarbon compounds, and has high calorific value and excellent combustion performance, which can achieve rapid, stable, continuous and complete combustion.
[0003] The self-propelled aviation oil filling device is a mobile device for filling aviation oil for aircraft. It is usually equipped with wheels or tracks, so that it can be moved at different locations to meet the refueling needs of aircraft at different locations. The self-propelled aviation oil filling device widely used in the market known to the inventors usually includes an oil drum, and the aviation oil filling of the aircraft is achieved by drawing fuel from the oil drum of the self-propelled aviation oil filling device. During the filling process, a relatively simple rubber hose is generally used as a liquid supplementing pipe for oil drawing operation.
[0004] In the process of implementing the technical scheme in the embodiments of the present application, the inventors found that when a rubber hose is used as a liquid supplementing pipe, the pipe body lacks necessary support, and the pipe body that deeply penetrates into the oil drum is difficult to adjust the position according to the intention of the operator, and the soft pipe body leads to poor controllability, so that the liquid supplementing pipe cannot be flexibly and quickly and accurately inserted into each part of the oil drum for precise oil drawing operation. In addition, the inventors also know that a liquid supplementing pipe with a metal pipe completely covered inside the rubber hose, although the metal pipe inside the rubber hose can increase the strength of the liquid supplementing pipe to meet the oil drawing needs at various angles in the oil drum, but due to the overall hardness of the pipe body, when the position and angle of the pipe body outside the oil drum are adjusted to adapt to the filling environment, the position of the pipe body inside the oil drum changes accordingly, and after adjusting the angle of the pipe inside, the entire pipe body needs to be kept stationary and the position needs to be relatively fixed, which also leads to low filling efficiency and increases the complexity of controlling the liquid supplementing pipe. In addition, the rubber hose, the metal pipe and the rubber hose with the metal pipe inside will inevitably generate static electricity during oil drawing, which poses a great safety hazard to the filling process.
[0005] The information disclosed in this BACKGROUND section is only for the purpose of enhancing the understanding of the background of the present disclosure and should not be considered as admitting that the information forms prior art that is known to those skilled in the art. SUMMARY
[0006] In view of at least one of the above technical problems, the present disclosure provides a liquid supplementing pipe for a self-propelled aviation oil filling device, mainly solving the technical problem that the existing liquid supplementing pipe has poor controllability and safety hazards during oil drawing.
[0007] According to one aspect of the present disclosure, a liquid supplement pipe for a self-propelled aviation fuel filling device is provided, which comprises a pipe body and a connector fixed to the corresponding end of the pipe body and used for connecting the aviation fuel filling device; the pipe body comprises a hard inner liner pipe and an outer pipe coaxially and correspondingly wrapped outside the hard inner liner pipe and comprising, from inside to outside, an inner rubber layer, a woven reinforcing layer and an outer rubber layer; the length of the hard inner liner pipe is less than the length of the outer pipe, and the two end faces of the hard inner liner pipe are respectively a certain distance from the corresponding end faces of the outer pipe.
[0008] In some embodiments of the present disclosure, an electrically conductive strip is clamped between the inner rubber layer and the woven reinforcing layer; and a terminal is arranged at the end of the pipe body corresponding to the side of the connector and is correspondingly connected with the electrically conductive strip and used for connecting a ground wire.
[0009] In some embodiments of the present disclosure, the hard inner liner pipe is made of stainless steel.
[0010] In some embodiments of the present disclosure, the inner rubber layer is made of butyronitrile rubber, and the outer rubber layer is made of chlorinated polyethylene. The woven reinforcing layer is a polyester fiber woven layer or a steel wire woven layer.
[0011] In some embodiments of the present disclosure, the distance between the end face of the hard inner liner pipe and the corresponding end face of the outer pipe at the end of the pipe body corresponding to the end extending into the oil drum is not less than 100 mm, and the distance between the end face of the hard inner liner pipe and the corresponding end face of the outer pipe at the end of the pipe body corresponding to the side of the connector is not less than 300 mm.
[0012] In some embodiments of the present disclosure, the connector is press-fitted at the end of the pipe body, and the connector is a threaded connector.
[0013] One or more technical solutions provided in the embodiments of the present disclosure have at least any of the following technical effects or advantages:
[0014] 1. The hard inner liner pipe is wrapped in the outer pipe, and the two ends of the outer pipe extend out of the hard inner liner pipe by a certain length, which can effectively avoid the safety problems caused by electric sparks or static electricity due to collision or friction between the hard inner liner pipe and the oil drum. At the same time, through the hardness of the hard inner liner pipe and the flexibility of the outer pipe within a certain range, the position control of the oil pumping end of the liquid supplement pipe and the connection of the connector at the end of the liquid supplement pipe can be facilitated, and the oil pumping efficiency can be improved.
[0015] 2. The hard inner liner pipe not only increases the strength of the pipe body of the liquid supplement pipe, but also reduces the flow resistance of the oil liquid due to the smooth inner wall, thereby helping to improve the oil pumping efficiency.
[0016] 3. The inner rubber layer can protect the conductive strip and the woven reinforcing layer from corrosion by oil, improve the structural reliability and service life of the liquid supplement pipe, and rely on the conductive strip to effectively discharge static electricity during use, ensuring the safety of the filling process. BRIEF DESCRIPTION OF DRAWINGS
[0017] Figure 1 The structure of the liquid supplement pipe in an embodiment of the present application is shown in the sectional view.
[0018] In the above figures, 1 is a hard inner liner pipe, 21 is an outer rubber layer, 22 is a woven reinforcing layer, 23 is an inner rubber layer, and 3 is a conductive strip. DETAILED DESCRIPTION
[0019] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inner", "outer", "vertical", "horizontal", "clockwise", "counterclockwise" and the like indicate the orientation or positional relationship shown in the drawings, and are only used for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. The present application involves "connection" and "coupling", which, unless otherwise specified, include direct and indirect connections (couplings).
[0020] In order to better understand the technical solutions of the present application, the above technical solutions will be described in detail below in combination with the drawings and specific embodiments.
[0021] To solve the technical problems of poor controllability of the liquid supplement pipe of the existing aviation fuel filling equipment during oil pumping and safety hazards caused by static electricity, the present example discloses a liquid supplement pipe for a self-propelled aviation fuel filling equipment, which comprises a pipe body and a connector fixed to one end of the pipe body.
[0022] Specifically, considering that the existing rubber hose type liquid supplement pipe is difficult to control the position of the end of the pipe when it is inserted into the oil drum for oil pumping, because the pipe body is relatively soft and lacks effective support, and the oil drum is generally deep, so that the end of the pipe inserted into the oil drum cannot be controlled, and the oil in the oil drum cannot be completely pumped according to the demand, thereby increasing the difficulty of oil pumping and reducing the efficiency of oil pumping. Therefore, in the present embodiment, referring to Figure 1, the pipe body includes a hard inner liner tube 1, and the structural hardness of the hard inner liner tube 1 provides a liquid supplement pipe to support and improve the controllability of the pipe body, thereby avoiding the problem that the pipe body is too soft to control the position of the pipe body end. Specifically, in this example, the hard inner liner tube is made of stainless steel, the inner diameter is 22±0.2mm, the outer diameter is 25±0.2mm, and the overall length is 1000mm. Thus, the structural hardness of the stainless steel material increases the structural hardness of the pipe body, and the inner wall of the stainless steel material inner liner tube is relatively smooth, thereby effectively reducing the flow resistance of the oil liquid in the pipeline and helping to improve the oil liquid extraction efficiency.
[0023] However, if the hard inner liner tube 1 made of stainless steel material is directly used as a liquid supplement pipe, the pipe body will inevitably collide or rub with the oil drum, thereby causing electric sparks or friction heat, which seriously affects the safety of the flammable and explosive oil liquid in the oil drum and poses a great safety hazard. Therefore, in this embodiment, an outer cover tube is wrapped around the outer layer of the hard inner liner tube 1. The outer cover tube is coaxially arranged with the hard inner liner tube 1 and uniformly and tightly wrapped around the outer edge of the hard inner liner tube 1. Thus, the outer cover tube wraps the hard inner liner tube to protect the outer edge of the hard inner liner tube, thereby avoiding collision or friction between the hard inner liner tube and the oil drum.
[0024] In this example, the hard inner liner tube 1 wrapped with the outer cover tube can avoid collision and friction between the stainless steel hard inner liner tube and the oil drum. However, the outer cover tube cannot effectively wrap the end of the hard inner liner tube 1, so that the end of the pipe body of the liquid supplement pipe is still prone to rigid collision with the oil drum when adjusting the position of the liquid supplement pipe. Therefore, in this embodiment, the length of the hard inner liner tube 1 is less than the length of the outer cover tube, and the outer cover tube extends beyond the hard inner liner tube by a certain distance at both ends. Thus, when the liquid supplement pipe is inserted into the oil drum for oil liquid extraction, the end of the pipe body inserted into the oil drum has the hard inner liner tube wrapped in the outer cover tube, and the end of the outer cover tube extends beyond the end of the hard inner liner tube by a certain length, so that the end of the hard inner liner tube is in the outer cover tube, thereby avoiding direct contact between the hard inner liner tube and the oil drum and preventing electric sparks caused by rigid collision, ensuring the safety of oil liquid extraction. The end of the liquid supplement pipe for oil liquid extraction is not less than 100mm from the end of the outer cover tube, that is, the outer cover tube extends beyond the hard inner liner tube by a certain length to effectively prevent rigid collision between the hard inner liner tube and the oil drum. Specifically, in this example, the inner diameter of the outer cover tube is 25±0.8mm, the outer diameter is 37±0.8mm, and the length is 1400mm, which is greater than the length of the hard inner liner tube of 1000mm, so that the hard inner liner tube is completely wrapped in the outer cover tube, and the end of the hard inner liner tube is 100mm from the end of the outer cover tube at the end of the liquid supplement pipe for oil liquid extraction into the oil drum.
[0025] In the embodiment, referring to Figure 1 The outer cover tube includes an outer rubber layer 21. In view of the fact that the outer rubber layer 21 will be rubbed with the external environment during the transportation and storage of the tube body, the outer rubber layer 21 in the embodiment is made of chlorinated polyethylene (CPE) material. The excellent wear resistance and aging resistance of the chlorinated polyethylene material can improve the service life of the tube body and the safety in use, and reduce the risk of oil leakage caused by wear of the tube body. Figure 1 The outer cover tube further includes a woven reinforcing layer 22 arranged at the inner edge of the outer rubber layer 21. In the embodiment, the woven reinforcing layer 22 is a polyester fiber woven layer. In other embodiments, the woven reinforcing layer is a steel wire woven layer. The woven reinforcing layer 22 can enhance the structural support of the outer rubber layer 21, and avoid the outer cover layer being too hard by deforming within a certain range, thereby enhancing the flexibility of the end of the tube body inserted into the oil drum and improving the oil extraction efficiency. In addition, the woven reinforcing layer can also enhance the tear resistance and wear resistance of the tube body, so that the tube body can maintain its shape and performance when subjected to external force. In the embodiment, the length of the woven reinforcing layer 22 is the same as that of the outer rubber layer 21, and the length is 1400 mm.
[0026] In addition, since the woven reinforcing layer 22 is coaxially attached to the inner edge of the outer rubber layer 21 and extends a certain length from the hard lining layer, the woven reinforcing layer 22 at the end of the tube body will be directly in contact with the oil when the tube body is inserted into the oil drum, thereby causing corrosion. Therefore, in the embodiment, referring to Figure 1 An inner rubber layer 23 is arranged at the inner edge of the woven reinforcing layer 22, so that the woven reinforcing layer 22 is clamped between the inner rubber layer 23 and the outer rubber layer 21. The inner rubber layer 23 can prevent the oil from contacting and corroding the woven reinforcing layer 22. In the embodiment, the inner rubber layer is made of nitrile rubber (NBR) material. The oil resistance and sealing performance of the nitrile rubber material can effectively prevent the oil from directly or seepingly contacting the woven reinforcing layer, thereby preventing the woven reinforcing layer from being corroded by the oil.
[0027] To further improve the safety of oil extraction and avoid static electricity accumulation in the oil drum causing electric sparks, in the embodiment, referring to Figure 1The conductive strip 3 is arranged between the woven reinforcing layer 22 and the inner rubber layer 23, and is arranged axially along the pipe body of the liquid supplement pipe. By guiding the static electricity, the safety hazard caused by static electricity is avoided. Meanwhile, the inner rubber layer 23 can also protect the conductive strip 3 from corrosion of the oil liquid. Specifically, in this example, a terminal is arranged at the end of the liquid supplement pipe corresponding to the end of the marine oil filling equipment. The terminal is connected with the conductive strip. Thus, by connecting the ground wire to the terminal, the static electricity induced by the conductive strip is safely released.
[0028] In addition, in order to facilitate the reliable connection between the liquid supplement pipe and the marine oil filling equipment, a connector is fixed to the other end of the liquid supplement pipe by the hose pressing machine. The connector is a threaded connector. Thus, the threaded quick connection between the liquid supplement pipe and the oil inlet of the marine oil filling equipment is realized. Considering that the hard inner liner pipe is arranged in the liquid supplement pipe, in order to avoid the influence of the hard inner liner pipe on the flexibility of the connection between the liquid supplement pipe and the marine oil filling equipment, in this example, the outer cover pipe also extends out of the hard inner liner pipe by a certain length at the end of the liquid supplement pipe corresponding to the connector. The distance between the end surface of the hard inner liner pipe and the end surface of the outer cover pipe, i.e. the distance by which the outer cover pipe extends out of the hard inner liner pipe, is not less than 300 mm. Thus, on the one hand, the connector can be conveniently pressed, and on the other hand, the liquid supplement pipe at the end can be deformed as needed within a certain range, so as to ensure the corresponding flexible connection between the liquid supplement pipe and the marine oil filling equipment, and improve the flexibility and stability of the connection. In this example, the distance between the end surface of the hard inner liner pipe and the end surface of the outer cover pipe is 300 mm.
[0029] Although some preferred embodiments of the present application have been described, those skilled in the art can make further changes and modifications to these embodiments once they know the basic inventive concept. Therefore, the appended claims are intended to be interpreted as including all changes and modifications falling within the scope of the present application.
[0030] Obviously, various modifications and changes can be made to the present application by those skilled in the art without departing from the spirit and scope of the present application. Thus, it is intended that the present application encompass such modifications and changes as fall within the scope of the appended claims and their equivalents.
Claims
1. A replenishment line for a self-propelled aircraft fuel refueling apparatus, comprising: The pipe body comprises a hard inner liner pipe, an outer cover pipe coaxially covering the hard inner liner pipe, and an inner rubber layer, a braided reinforcing layer, and an outer rubber layer in sequence from inside to outside of the outer cover pipe.
2. The fluid supplement tube according to claim 1, wherein An electrically conductive strip is arranged between the inner rubber layer and the braided reinforcing layer.
3. The fluid supplement tube of claim 1, wherein The hard inner liner pipe is made of stainless steel.
4. The fluid supplement tube of claim 1, wherein The inner rubber layer is made of butyronitrile rubber, and the outer rubber layer is made of chlorinated polyethylene.
5. The fluid supplement tube of claim 1, wherein The hard inner liner pipe is arranged at a distance of not less than 100 mm from the corresponding end surface of the outer cover pipe at the end of the pipe body inserted into the oil drum.
6. The fluid supplement tube of claim 1, wherein, The joint is a threaded joint.