Emergency release device for air brake of refueling vehicle

Abstract

The invention belongs to the field of refueling vehicle air brakes, and particularly relates to a refueling vehicle air brake emergency relieving device which comprises a supporting rail used for providing sliding guide, and the peripheral wall of the supporting rail is connected with a containing sliding frame used for bearing a nitrogen source in a sliding fit mode. A nitrogen tank with the pre-charging pressure of 0.9-1 MPa is detachably installed on the containing sliding frame, and the top of the containing sliding frame is fixedly connected with a containing plate used for integrating a gas circuit control component. And a gas source main switch for controlling the on-off of a gas source of the nitrogen tank is fixedly mounted on the outer wall of the placement plate. According to the refueling vehicle air brake emergency release device, when parking brake cannot be released due to insufficient air pressure of the refueling vehicle, the brake state can be quickly released, it is ensured that the vehicle timely leaves an operation area, and related operation processes are prevented from being affected; meanwhile, the emergency function can be achieved without changing an original vehicle braking system of the refueling vehicle, additional damage to original vehicle equipment is avoided, professional maintenance personnel are not needed in operation, and the operation threshold is lowered.

Description

Technical Field

[0001] This invention relates to the field of air brake technology for fuel trucks, specifically to an emergency release device for air brakes on fuel trucks. Background Technology

[0002] The six-chassis pipeline refueling truck's braking system is a pneumatic brake, with a parking brake that is an air-cut brake (i.e., an air-cut brake). Its advantages include strong braking force, fast response speed, high safety, and good heat dissipation. Its disadvantage is its strong dependence on air pressure. During flight support missions, if the refueling truck experiences insufficient pressure in the air tank due to reasons such as vehicle start failure, handbrake valve malfunction, or air pipe rupture, the parking brake will not be released, preventing the refueling truck from being evacuated and hindering aircraft pushback, causing flight delays.

[0003] Currently, traditional fuel truck air brake systems lack dedicated emergency release devices. When insufficient air pressure prevents the parking brake from being released, it is necessary to wait for professional maintenance personnel with special tools to arrive on-site. This process is cumbersome and time-consuming, which can easily affect related operational processes. Some emergency solutions also require modifications to the original vehicle braking system, making the steps complex. Therefore, we propose an emergency release device for fuel truck air brakes. Summary of the Invention

[0004] The main objective of this invention is to provide an emergency release device for the air brakes of a refueling truck, which can solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention proposes an emergency release device for the air brake of a refueling truck, comprising a support rail for providing sliding guidance, a placement slide for supporting a nitrogen source being slidably connected to the outer peripheral wall of the support rail, a nitrogen tank with a pre-charge pressure of 0.9-1 MPa being detachably mounted on the placement slide, and a placement plate for integrating gas circuit control components being fixedly connected to the top of the placement slide, a main gas source switch for controlling the on / off of the nitrogen tank gas source being fixedly mounted on the outer wall of the placement plate, and a gas source triplet connected to the main gas source switch via a high-pressure gas pipe, having the functions of filtering impurities and adjusting the pressure to 0.65-0.8 MPa being fixedly mounted on the outer wall of the placement plate, the gas source triplet being connected to the main gas source switch via a high-pressure gas pipe to a two-position four-way reversing valve for switching the gas circuit direction, and the two-position four-way reversing valve being connected to the parking brake cylinder of the refueling truck via a high-pressure gas pipe at the end away from the main gas source switch.

[0006] Preferably, a docking rail is fixedly connected to the top of the support rail, and a mounting base is slidably connected to the outer peripheral wall of the docking rail. A mounting top seat is detachably installed on the mounting base, and the docking rail is fixed to the top of the support rail by full welding.

[0007] Preferably, the mounting base has a threaded hole, and the mounting top has a countersunk through hole. The mounting base and the mounting top are detachably connected by an external hexagonal screw passing through the countersunk through hole and engaging with the threaded hole. The nitrogen tank is clamped and fixed by the cooperation of the mounting base and the mounting top. Two sets of threaded holes are provided on one set of mounting bases.

[0008] Preferably, the placement slide is provided with a positioning component, the positioning component includes an adjusting right angle plate, the outer wall of the adjusting right angle plate is fixedly connected to the outer wall of the placement slide, the adjusting right angle plate has a sliding hole, a positioning rod is slidably connected in the sliding hole, and a positioning through hole is provided on the support rail.

[0009] Preferably, the positioning rod can slide into the positioning through hole, and a pull plate is fixedly connected to the end face of the positioning rod. The adjusting right angle plate is elastically connected to the pull plate through a first spring. The end of the support rail away from the positioning through hole is fixedly connected to an abutting right angle plate. The abutting right angle plate provides unidirectional limitation on the movement position of the slide 2 and also facilitates the positioning rod to move quickly to the positioning through hole.

[0010] Preferably, the placement slide is provided with a limiting component, the limiting component including a mounting base, and the mounting base is fixedly connected to the top of the placement slide.

[0011] Preferably, a guide rod is slidably connected to the inner wall of the mounting base, one end of the guide rod is fixedly connected to a toggle plate, and the other end of the guide rod is fixedly connected to a limit sleeve.

[0012] Preferably, the mounting base and the limiting sleeve are elastically connected by a second spring, and the limiting sleeve has a limiting groove, into which the mounting base can be snapped.

[0013] Preferably, the outer peripheral wall of the docking rail is slidably connected to a first blocking seat, and the outer wall of the first blocking seat is fixedly connected to a blocking square plate.

[0014] Preferably, the outer peripheral wall of the docking rail is slidably connected to a second blocking seat, and the outer wall of the second blocking seat is fixedly connected to a blocking curved plate. The blocking curved plate has an arc-shaped structure (the arc radius is adapted to the top cone of the nitrogen tank) and can tightly abut against the top of the nitrogen tank.

[0015] This invention provides an emergency release device for the air brakes of a refueling truck. It has the following beneficial effects: (1) The emergency release device for the air brake of the refueling truck can quickly release the braking state when the parking brake cannot be released due to insufficient air pressure, ensuring that the vehicle can leave the work area in time and avoid affecting the relevant operation process; at the same time, the emergency function can be realized without modifying the original braking system of the refueling truck, without causing additional damage to the original equipment, and the operation does not require professional maintenance personnel, thus reducing the operating threshold.

[0016] (2) The emergency release device for the air brake of the refueling truck can provide convenient conditions for the daily inspection of nitrogen tanks. By pulling the pull plate to drive the positioning rod to disengage from the positioning through hole of the support rail, the fixed state of the placement slide can be released, and the placement slide can be pushed to move outward along the support rail, thereby bringing the nitrogen tank to an external area that is easy to operate. There is no need to disassemble the complex fixing structure or use special tools. One person can complete the position adjustment. After the inspection is completed, push the placement slide to reset, and the first spring can automatically drive the positioning rod to insert into the positioning through hole to re-fix the placement slide. This greatly simplifies the operation process of daily inspection of nitrogen tanks and improves inspection efficiency.

[0017] (3) The emergency release device for the gas brake of the refueling truck can realize the quick disassembly and replacement of the nitrogen tank. When replacing, first loosen the abutment screw on the second stop seat to release the fixation between the second stop seat and the docking rail, and remove it from the docking rail to release the limit on the top of the nitrogen tank; then pull the actuating plate to drive the guide slide rod to move towards the mounting seat, thereby moving the limit sleeve away from the mounting base and releasing the clamping constraint on the mounting base; then slide the mounting base along the docking rail, and the mounting base will drive the mounting top seat and the nitrogen tank that are clamped with it to disengage from the docking rail together, and finally complete the disassembly and replacement of the nitrogen tank; the whole process can be operated independently by a single person without disassembling a large number of parts, effectively shortening the time spent on nitrogen tank replacement and ensuring that the refueling truck can quickly return to emergency use status. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention 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 the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 This is a schematic diagram of the structure of the carriage and docking rail of the present invention; Figure 3 This is a schematic diagram of the structure of the present invention. Figure 2 Enlarged diagram of A in the middle; Figure 4This is an exploded structural diagram of the mounting base and mounting top of the present invention; Figure 5 This is a schematic diagram of the structure of the nitrogen tank and the contact right-angle plate of the present invention; Figure 6 This is a schematic diagram of the structure of the first blocking seat and the blocking curved plate of the present invention; Figure 7 This is a schematic diagram of the structure of the present invention. Figure 6 Enlarged diagram of B in the diagram.

[0020] The following are the symbol descriptions: 1. Support rail; 2. Carriage placement; 3. Nitrogen tank; 4. Placement plate; 5. Main gas supply switch; 6. Gas supply triplet; 7. Two-position four-way reversing valve; 8. Parking brake caliper; 9. Connecting rail; 10. Mounting base; 11. Mounting top plate; 12. Threaded hole; 13. Countersunk through hole; 14. Hex bolt; 15. Positioning assembly; 151. Adjusting right-angle plate; 152. Positioning rod; 153. Positioning through hole; 154. Pull plate; 155. First spring; 156. Abutting right-angle plate; 16. Limiting assembly; 161. Mounting seat; 162. Guide slide rod; 163. Actuating plate; 164. Limiting sleeve; 165. Second spring; 166. Limiting slot; 17. First blocking seat; 18. Blocking square plate; 19. Second blocking seat; 20. Blocking curved plate.

[0021] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Please see Figures 1-7This invention proposes an emergency release device for the air brake of a refueling truck, comprising a support rail 1 for providing sliding guidance. The support rail 1 can be fixed to a pre-installed area on the chassis of the refueling truck by bolts. A placement slide 2 for supporting a nitrogen source is slidably connected to the outer peripheral wall of the support rail 1. A nitrogen tank 3 with a pre-charge pressure of 0.9-1 MPa is detachably installed on the placement slide 2. The nitrogen tank 3 is equipped with a pressure gauge at its opening for real-time monitoring of nitrogen pressure. A placement plate 4 for integrating gas circuit control components is fixedly connected to the top of the placement slide 2. A main gas supply switch 5 for controlling the on / off of the nitrogen supply from the nitrogen tank 3 is fixedly installed on the outer wall of the placement plate 4. The main gas supply switch 5 is a high-pressure gas circuit switch with good sealing performance, capable of quickly cutting off or connecting the nitrogen supply. Furthermore, a device connected to the main gas supply switch 5 via a high-pressure gas pipe, which filters impurities and regulates the pressure to 0.65-0.8 MPa, is also fixedly installed on the outer wall of the placement plate 4. The air supply triplet 6 with MPa function can filter, reduce pressure and stabilize nitrogen to ensure that the air pressure input to the brake caliper meets safety standards. This is existing technology, so it will not be described in detail.

[0024] In an embodiment of the invention, the end of the gas source triplet 6 furthest from the main gas source switch 5 is connected via a high-pressure gas pipe to a two-position four-way reversing valve 7 for switching the gas path direction. The two-position four-way reversing valve 7 can quickly switch the gas path direction, accurately introducing nitrogen into the parking brake slave cylinder 8. The end of the two-position four-way reversing valve 7 furthest from the gas source triplet 6 is connected to the parking brake slave cylinder 8 of the refueling truck via a high-pressure gas pipe. The high-pressure gas pipe is a high-pressure resistant rubber hose with strong pressure resistance to ensure leak-free nitrogen delivery. The gas pipe is laid along the existing pipelines on the chassis of the refueling truck and secured with nylon cable ties (spaced 200mm apart). To prevent the air pipe from shaking and wearing during vehicle operation, the top of the support rail 1 is fixedly connected to the docking rail 9. The outer peripheral wall of the docking rail 9 is slidably connected to the mounting base 10. The mounting base 10 is detachably mounted with the mounting top seat 11. The mounting base 10 has a threaded hole 12, and the mounting top seat 11 has a countersunk through hole 13. The mounting base 10 and the mounting top seat 11 are detachably connected by an external hexagonal screw 14 passing through the countersunk through hole 13 and then threaded into the threaded hole 12. The mounting base 10 and the mounting top seat 11 are used to clamp and fix the nitrogen tank 3.

[0025] Furthermore, a positioning component 15 is provided on the placement slide 2. The positioning component 15 includes an adjusting right angle plate 151. The outer wall of the adjusting right angle plate 151 is fixedly connected to the outer wall of the placement slide 2. A sliding hole is provided on the adjusting right angle plate 151, and a positioning rod 152 is slidably connected in the sliding hole. A positioning through hole 153 is provided on the support rail 1. The positioning rod 152 can slide into the positioning through hole 153. A pull plate 154 is fixedly connected to the end face of the positioning rod 152. The adjusting right angle plate 151 and the pull plate 154 are elastically connected by a first spring 155. An abutting right angle plate 156 is fixedly connected to the end of the support rail 1 away from the positioning through hole 153.

[0026] Furthermore, a limiting component 16 is provided on the placement slide 2. The limiting component 16 includes a mounting base 161. The mounting base 161 is fixedly connected to the top of the placement slide 2. A guide slide rod 162 is slidably connected to the inner wall of the mounting base 161. One end of the guide slide rod 162 is fixedly connected to a toggle plate 163, and the other end of the guide slide rod 162 is fixedly connected to a limiting sleeve 164. The mounting base 161 and the limiting sleeve 164 are elastically connected by a second spring 165. A limiting slot 166 is provided on the 4, and the mounting base 10 can be snapped into the limiting slot 166. By moving the actuating plate 163, the guide slide rod 162 drives the limiting sleeve 164 to approach the mounting base 161, so that the mounting base 10 can be moved to that position. By releasing the actuating plate 163, the second spring 165 returns to its original position, which drives the limiting sleeve 164 to approach the mounting base 10, thus completing the snapping work of the mounting base 10 and fixing the mounting base 10 on the docking rail 9.

[0027] Furthermore, a first blocking seat 17 is slidably connected to the outer peripheral wall of the docking rail 9, and a blocking square plate 18 is fixedly connected to the outer wall of the first blocking seat 17. A second blocking seat 19 is slidably connected to the outer peripheral wall of the docking rail 9, and a blocking curved plate 20 is fixedly connected to the outer wall of the second blocking seat 19. Both the first blocking seat 17 and the second blocking seat 19 are provided with threaded through holes, and abutment screws are provided at the threaded through holes. By tightening the abutment screws, the abutment screws can abut against the docking rail 9, thereby fixing the positions of the first blocking seat 17 and the second blocking seat 19. The blocking square plate 18 can easily abut against the bottom plane of the nitrogen cylinder, thereby performing unidirectional limiting work. The blocking curved plate 20 can easily abut against the top cone of the nitrogen cylinder, thereby performing unidirectional limiting work. By changing the distance between the first blocking seat 17 and the second blocking seat 19, it is convenient to adapt to the limiting requirements of nitrogen tanks 3 of different heights.

[0028] In this invention, during use, under normal conditions, the positioning rod 152 is inserted into the positioning through hole 153 of the support rail 1, the limiting sleeve 164 is engaged with the mounting base 10, the first blocking seat 17 and the second blocking seat 19 are fixed by the abutment screw, and the nitrogen tank 3 is stably clamped between the mounting base 10 and the mounting top seat 11. When the refueling truck cannot release the parking brake due to insufficient air pressure, turn on the main air supply switch 5. The nitrogen in the nitrogen tank 3 is filtered and regulated by the air supply triple unit 6, and then introduced into the parking brake brake slave cylinder 8 through the two-position four-way reversing valve 7 to quickly release the brake state. After the vehicle is removed, reset the main air supply switch 5 and the two-position four-way reversing valve 7. During routine inspection of nitrogen tank 3, pull the pull plate 154 to compress the first spring 155, causing the positioning rod 152 to disengage from the positioning through hole 153, and push the placement slide 2 to move outward along the support rail 1 for convenient inspection. After the inspection is completed, push the placement slide 2 to the abutting right angle plate 156, and the first spring 155 will drive the positioning rod 152 to re-insert into the positioning through hole 153. When replacing nitrogen tank 3, first loosen the abutting screw on the second blocking seat 19, slide the blocking curved plate 20 to disengage from the docking rail 9, then pull the actuating plate 163 to compress the second spring 165, so that the limit sleeve 164 disengages from the mounting base 10, slide the mounting base 10 along the docking rail 9 to drive the nitrogen tank 3 to disengage, and quickly complete the disassembly work. Then slide the new nitrogen tank 3, the new mounting base 10, and the new mounting top seat 11 onto the docking rail 9. Move the toggle plate 163 to make the limit sleeve 164 re-engage with the new mounting base 10, and make the blocking curved plate 20 on the second blocking seat 19 abut against the nitrogen cylinder to complete the fixation of the new nitrogen tank 3.

[0029] All electrical components appearing in this application are electrically connected to the controller and 220V AC mains power, and are conventional and known devices. The signal interaction between the components adopts the PLC control protocol commonly used in industrial equipment, which is common knowledge to those skilled in the art and can be implemented without additional detailed description. The control logic and signal interaction method are existing technologies and will not be described in detail. All standard parts used in this application can be purchased from the market. The specific connection methods of each part are all conventional methods such as riveting and welding that are mature in the prior art. The standard parts are all conventional models in the prior art, and the circuit connection adopts conventional connection methods in the prior art.

[0030] It should be noted that the above electrical components are all existing technology products. Those skilled in the art should select, install, and complete the circuit debugging work according to the needs of use to ensure that each electrical appliance can work normally. The components are all general standard parts or components known to those skilled in the art. Their structure and principle can be known by those skilled in the art through technical manuals or conventional experimental methods. No specific restrictions are made here. The supporting structures of the hydraulic drive structure appearing in this application document, such as hydraulic tanks and hydraulic pumps, are existing equipment and will not be described in detail here.

[0031] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. An emergency release device for the air brake of a refueling truck, characterized in that: The system includes a support rail (1) for providing sliding guidance, with a sliding bracket (2) for supporting a nitrogen source slidably connected to the outer peripheral wall of the support rail (1). A nitrogen tank (3) with a pre-charge pressure of 0.9-1 MPa is detachably mounted on the sliding bracket (2), and a mounting plate (4) for integrating gas circuit control components is fixedly connected to the top of the sliding bracket (2). A main gas source switch (5) for controlling the gas supply of the nitrogen tank (3) is fixedly mounted on the outer wall of the mounting plate (4), and a device for filtering impurities and adjusting the pressure to 0.65-0.8 MPa is also fixedly mounted on the outer wall of the mounting plate (4). The gas source triple unit (6) has a two-position four-way reversing valve (7) for switching the direction of the gas path connected to one end of the gas source triple unit (5) away from the main gas source switch (5) via a high-pressure gas pipe. The two-position four-way reversing valve (7) is connected to the parking brake brake sub-pump (8) of the refueling truck via a high-pressure gas pipe at one end away from the gas source triple unit (6).

2. The emergency release device for the air brake of a refueling truck according to claim 1, characterized in that: The top of the support rail (1) is fixedly connected to the docking rail (9), and the outer peripheral wall of the docking rail (9) is slidably connected to the mounting base (10). The mounting base (10) is detachably mounted with the mounting top seat (11).

3. The emergency release device for the air brake of a refueling truck according to claim 2, characterized in that: The mounting base (10) has a threaded hole (12), and the mounting top seat (11) has a countersunk through hole (13). The mounting base (10) and the mounting top seat (11) are detachably connected by passing an external hexagonal screw (14) through the countersunk through hole (13) and screwing it into the threaded hole (12). The nitrogen tank (3) is clamped and fixed by the cooperation of the mounting base (10) and the mounting top seat (11).

4. The emergency release device for the air brake of a refueling truck according to claim 3, characterized in that: The placement slide (2) is provided with a positioning component (15), which includes an adjusting right angle plate (151). The outer wall of the adjusting right angle plate (151) is fixedly connected to the outer wall of the placement slide (2). The adjusting right angle plate (151) has a sliding hole, and a positioning rod (152) is slidably connected in the sliding hole. The support rail (1) has a positioning through hole (153).

5. The emergency release device for the air brake of a refueling truck according to claim 4, characterized in that: The positioning rod (152) can slide into the positioning through hole (153). The end face of the positioning rod (152) is fixedly connected to the pull plate (154). The adjusting right angle plate (151) and the pull plate (154) are elastically connected by the first spring (155). The end of the support rail (1) away from the positioning through hole (153) is fixedly connected to the abutting right angle plate (156).

6. The emergency release device for the air brake of a refueling truck according to claim 3, characterized in that: The placement slide (2) is provided with a limiting component (16), the limiting component (16) includes a mounting base (161), and the top of the placement slide (2) is fixedly connected to the mounting base (161).

7. The emergency release device for the air brake of a refueling truck according to claim 6, characterized in that: The inner wall of the mounting base (161) is slidably connected to a guide slide rod (162), one end of the guide slide rod (162) is fixedly connected to a toggle plate (163), and the other end of the guide slide rod (162) is fixedly connected to a limit sleeve (164).

8. The emergency release device for the air brake of a refueling truck according to claim 7, characterized in that: The mounting base (161) and the limiting sleeve (164) are elastically connected by a second spring (165). The limiting sleeve (164) has a limiting slot (166) and the mounting base (10) can be snapped into the limiting slot (166).

9. The emergency release device for the air brake of a refueling truck according to claim 2, characterized in that: The outer peripheral wall of the docking rail (9) is slidably connected to a first blocking seat (17), and the outer wall of the first blocking seat (17) is fixedly connected to a blocking square plate (18).

10. The emergency release device for the air brake of a refueling truck according to claim 9, characterized in that: The outer peripheral wall of the docking rail (9) is slidably connected to a second blocking seat (19), and the outer wall of the second blocking seat (19) is fixedly connected to a blocking curved plate (20).

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