Airport apron pipe network valve pneumatic control system

Abstract

The invention belongs to the technical field of valve control, and discloses an airport apron pipe network valve pneumatic control system, which comprises a mounting frame, a pneumatic control system and a control system, the driving air cylinder is rotationally mounted on the mounting frame and comprises a cylinder body and a piston push rod which is in sliding fit with the cylinder body; one end of the swing arm is fixedly connected to the valve driving shaft, and the other end of the swing arm is rotationally connected to the piston push rod through a hinge piece, so that the swing arm and the valve driving shaft swing around the central axis of the valve driving shaft in a reciprocating manner along with the reciprocating motion of the piston push rod; the air source is connected with the driving air cylinder through an air supply pipeline; when the piston push rod retracts to a valve closing position in the cylinder body in the axial direction, a retraction gap is reserved between the tail end of the piston push rod and the tail end of an inner cavity of the cylinder body. Therefore, the problem that the difficulty of personnel operation and coordination communication is large is solved through pneumatic control, the retraction gap is reserved in the driving air cylinder executing pneumatic control, and it is effectively ensured that the valve in the high-low point device is opened and closed in place.

Description

Technical Field

[0001] This invention belongs to the field of valve control technology, specifically relating to a pneumatic control system for apron pipeline valves. Background Technology

[0002] The high-low point system consists of an outlet, a maintenance valve, and an operating valve. Currently, the installation of high-low point systems depends on the apron piping network route, the elevation difference of the area where the network is located, and industry standards; they are considered ancillary facilities of the apron piping network. The high point system is located at the highest point of the apron piping network and is mainly used for periodically discharging residual gases within the network; the low point system is located at the lowest point of the apron piping network and is mainly used for periodically discharging residual moisture and particulate matter within the network.

[0003] The lower ball valve of the high / low point device is called the maintenance valve, and the upper ball valve is called the operating valve. The maintenance valve is normally open, and the discharge valve is normally closed. During routine high / low point discharge operations, two operators are required to work together. One operator manually opens the discharge valve and holds the switch handle to ensure timely closure in case of emergencies. The other operator stands on a platform next to the vehicle-mounted fuel tank with the discharge valve fully open, taking samples under full flow and pressure conditions. The problems are as follows: First, the operator controlling the high / low point discharge valve must kneel on one knee for extended periods to operate the switch manually, which is time-consuming and laborious. In case of abnormal situations such as aircraft taxiing in / out of parking positions or taxiing on taxiways, a rapid response and timely evacuation are not possible, potentially causing unsafe incidents that obstruct aircraft. Second, in noisy environments such as aprons, public roads, and taxiways, operators typically wear noise-canceling earplugs, making effective communication between the two operators difficult and time-consuming. Summary of the Invention

[0004] In view of this, in order to solve the problems mentioned in the background art, the purpose of the present invention is to provide a pneumatic control system for apron pipeline valves.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a pneumatic control system for apron pipeline valves, comprising: a mounting bracket, fixedly mounted to the valve; a drive cylinder, rotatably mounted to the mounting bracket, including a cylinder body and a piston push rod that slides with the cylinder body; a swing arm, one end fixedly connected to the valve drive shaft, and the other end rotatably connected to the piston push rod via a hinge, so that the swing arm and the valve drive shaft swing back and forth around the central axis of the valve drive shaft as the piston push rod reciprocates; and an air source, connected to the drive cylinder via an air supply pipeline; wherein, when the piston push rod retracts axially into the cylinder body to the closed valve position, a retraction gap is reserved between the tail end of the piston push rod and the tail end of the inner cavity of the cylinder body.

[0006] Preferably, the mounting bracket includes a first mounting part and a second mounting part connected by a bending portion, the first mounting part being fixedly mounted to the valve, and the drive cylinder being rotatably mounted to the second mounting part.

[0007] Preferably, the first mounting part is provided with a center hole and a mounting hole. When the first mounting part is fixedly installed to the valve, the valve drive shaft passes through the center hole, the valve fixing hole is aligned with the mounting hole, and the mounting hole is constructed as an oblong hole.

[0008] Preferably, the second mounting part is configured as a U-shaped structure, and the cylinder body of the drive cylinder is rotatably mounted into the opening groove of the U-shaped structure.

[0009] Preferably, the second mounting part includes an integrally formed L-shaped mounting plate and an auxiliary mounting plate that is detachably fixed to the L-shaped mounting plate by bolts.

[0010] Preferably, the L-shaped mounting plate includes a vertical plate parallel to the first mounting part and a horizontal base plate connected to the bottom of the vertical plate, the bent part is connected between the first mounting part and the vertical plate, and a reinforcing connecting plate is connected between the horizontal base plate and the first mounting part.

[0011] Preferably, an adjusting screw is fixed at the head end of the piston push rod, and an adjusting nut that cooperates with the adjusting screw is fixed on the hinge.

[0012] Preferably, a rotating bracket is detachably fixed to the front end of the cylinder by bolts, and the mounting bracket is provided with a through hole that mates with the rotating shaft of the rotating bracket.

[0013] Preferably, the air source includes a pressure storage tank and a regulating valve connected between the air outlet of the pressure storage tank and the drive cylinder.

[0014] Preferably, the air source further includes an air compressor and a filter connected to the air inlet end of the pressure storage tank along the air inlet direction. A pressure sensor linked to the air compressor is provided on the pressure storage tank so that the air compressor starts when the air pressure in the pressure storage tank is less than the low pressure threshold and stops when the air pressure in the pressure storage tank is greater than the high pressure threshold.

[0015] Compared with the prior art, the present invention has the following advantages: (1) This invention provides a pneumatic control system for apron pipeline valves. Through the pneumatic control of the valves, the traditional two-person operation mode of the high and low point device of the apron pipeline is optimized into a single-person independent operation, which solves the problem of difficult operation and coordination communication, reduces labor costs and improves work efficiency. Furthermore, a retraction gap is reserved in the drive cylinder that performs pneumatic control, thereby effectively ensuring that the valves in the high and low point device are opened and closed in place. (2) In this invention, a mounting bracket with a suitable structure is provided to facilitate the integrated installation of the drive cylinder and the swing arm onto the valve, making the overall system structure installation more reasonable. (3) In this invention, the mounting bracket includes a first mounting part and a second mounting part with a U-shaped structure, thereby achieving symmetrical support for the drive cylinder and improving drive stability. In addition, the connecting bend and reinforcing plate between the first mounting part and the second mounting part can further enhance the structural strength of the mounting bracket; (4) In this invention, the first mounting part is provided with a waist-shaped mounting hole for mounting, so that the mounting position of the mounting bracket can be adaptively fine-tuned; (5) In this invention, the swing arm is rotatably connected to the piston push rod through a hinge, an adjusting screw is fixed on the piston push rod, and an adjusting nut that cooperates with the adjusting screw is fixed on the hinge, so as to further adapt the size of the retraction gap and simplify the assembly of the overall structure. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is one of the structural schematic diagrams of the mounting bracket, drive cylinder and swing arm assembly in this invention; Figure 3 This is a second schematic diagram of the assembly of the mounting bracket, drive cylinder and swing arm in this invention; Figure 4 This is a schematic diagram of the mounting bracket in this invention; Figure 5 This is a schematic diagram of the assembly of the first mounting part and the L-shaped mounting plate in this invention; Figure 6 This is a schematic diagram of the assembly of the drive cylinder and the swing arm in this invention.

[0017] In the diagram: Mounting bracket-1; Bending section-11; First mounting section-12; Center hole-121; Mounting hole-122; Second mounting section-13; L-shaped mounting plate-131; Auxiliary mounting plate-132; Reinforcing connecting plate-14; Drive cylinder-2; Cylinder body-21; Piston push rod-22; Adjusting screw-23; Rotating frame-24; Swing arm-3; Hinge-connector-31; Adjusting nut-32; Pressure storage tank-4; Regulating valve-41; Air compressor-5; Filter-6. Detailed Implementation

[0018] To further understand the content of this invention, a detailed description of the invention is provided in conjunction with the accompanying drawings and embodiments. The structures, proportions, sizes, etc., depicted in the accompanying drawings are merely for illustrative purposes and to aid those skilled in the art, and are not intended to limit the implementation conditions of the invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effects and objectives of the invention, should still fall within the scope of the technical content disclosed in this invention. Furthermore, terms such as "upper," "lower," "left," "right," and "middle" used in this specification are merely for clarity and not intended to limit the scope of implementation. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention. It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this application described herein.

[0019] like Figure 1 As shown, the pneumatic control system for apron pipeline valves provided by the present invention includes a mounting frame 1, a drive cylinder 2, a swing arm 3, and an air source. Specifically, the mounting frame 1 is fixedly mounted to the valve; the drive cylinder 2 is rotatably mounted to the mounting frame 1 and includes a cylinder body 21 and a piston push rod 22 that slides with the cylinder body 21; one end of the swing arm 3 is fixedly connected to the valve drive shaft, and the other end is rotatably connected to the piston push rod 22 through a hinge 31, so that the swing arm 3 and the valve drive shaft swing back and forth around the central axis of the valve drive shaft as the piston push rod 22 reciprocates; the air source is connected to the drive cylinder 2 through an air supply pipeline. When the piston push rod 22 retracts axially into the cylinder body 21 to the closed valve position, a retraction gap is reserved between the tail end of the piston push rod 22 and the tail end of the inner cavity of the cylinder body 21.

[0020] According to the above structure, when the valve of the apron pipeline high / low point device is activated, the air source supplies air to the drive cylinder 2 and executes the extension of the piston rod 22 relative to the cylinder body 21. At this time, the piston rod 22 pushes the swing arm 3 through the hinge 31. Figure 2 The state shown swings to Figure 3 As shown, the valve is rotated around its central axis by the valve drive shaft, which is fixedly connected to the swing arm 3, thereby driving the valve from the closed state to the open state. When closing the valve of the apron pipeline high and low point device, the air source supplies air to the drive cylinder 2 and executes the retraction of the piston rod 22 relative to the cylinder body 21. At this time, the piston rod 22 pulls the swing arm 3 from the open state via the hinge 31. Figure 3 The state shown swings to Figure 2 As shown in the figure, the valve drive shaft, which is fixedly connected to the swing arm 3, rotates around its central axis, thereby driving the valve from the open state to the closed state.

[0021] Further as Figure 2 and Figure 3 As shown, to ensure smooth driving of the rocker arm 3 by the drive cylinder 2, the rocker arm 3 is initially tilted at 45°, with the lower tilted end of the rocker arm 3 connected to the valve drive shaft and the upper tilted end connected to the piston push rod 22. Under this structural design, during the swinging process of the rocker arm 3, to adapt to the changes in the position of the rocker arm 3 and the hinge 31, the drive cylinder 2 also swings at a certain angle, thereby ensuring the smooth operation of the overall structure.

[0022] It should be noted that the pneumatic control system of this application is preferably equipped with a controller that can be remotely controlled. Thus, the operator can use the remote controller to perform remote opening and closing control of the drive cylinder 2, optimizing the traditional two-person operation mode of the apron pipeline high and low point device into a single-person independent operation, thereby solving the problem of high difficulty in personnel operation and coordination.

[0023] Regarding the gas source, refer to... Figure 1As shown, in some embodiments, the air source includes a pressure storage tank 4 and a regulating valve 41 connected between the outlet of the pressure storage tank 4 and the drive cylinder 2. Thus, the outlet pressure of the pressure storage tank 4 is adjusted by the regulating valve 41, thereby changing the extension and retraction speed of the piston rod 22, reducing the risk of water hammer, and protecting the equipment's pipeline system. Specifically: When the high / low point device valve (discharge valve) is not submerged in water, by adjusting the opening of the regulating valve 41, the drive cylinder 2 extends for 5 seconds as the air pressure rises from 0 MPa to approximately 0.5 MPa. During this process, the drive cylinder 2 slowly pushes the swing arm 3 within 2 seconds, and then accelerates to push the swing arm 3 to its highest point before stopping. When closing, the drive cylinder 2 retracts for 7 seconds as the air pressure rises from 0 MPa to approximately 0.56 MPa. During this process, the drive cylinder 2 slowly pushes the swing arm 3 within 2 seconds, and then accelerates to push the swing arm 3 to its initial position within 3 seconds, and continues to act for 2 seconds while the swing arm 3 is in its initial position, so that the valve (discharge valve) is fully closed. When the high / low point device valve (discharge valve) is submerged in water, the opening of the regulating valve 41 is adjusted so that the drive cylinder 2 extends for 7 seconds as the air pressure rises from 0 MPa to approximately 0.52 MPa. During this process, the drive cylinder 2 slowly pushes the swing arm 3 within 2 seconds, and then accelerates to push the swing arm 3 to the highest point before stopping. When closed, the drive cylinder 2 retracts for 9 seconds as the air pressure rises from 0 MPa to approximately 0.58 MPa. During this process, the drive cylinder 2 slowly pushes the swing arm 3 within 2 seconds, and then accelerates to push the swing arm 3 to the initial position within 5 seconds. The swing arm 3 continues to act for 2 seconds when it is in the initial position, so that the valve (discharge valve) is completely closed.

[0024] refer to Figure 1 As shown, in some embodiments, the air source further includes an air compressor 5 and a filter 6 connected along the air intake direction to the air intake end of the pressure storage tank 4. A pressure sensor linked to the air compressor 5 is installed on the pressure storage tank 4, so that the air compressor 5 starts when the air pressure in the pressure storage tank 4 is lower than a low-pressure threshold and stops when the air pressure in the pressure storage tank 4 is higher than a high-pressure threshold. Specifically: through the cooperation of the air compressor 5 and the pressure sensor, the air pressure in the pressure storage tank 4 is stably maintained at approximately 0.85 MPa, thereby effectively meeting the driving requirements of the aforementioned drive cylinder 2; through the installation of the filter 6, the gas stored in the pressure storage tank 4 is all filtered and purified gas, thereby ensuring smooth operation of the drive cylinder 2.

[0025] In addition, the air compressor 5 is equipped with an overheat protector and an overload protector inside its drive motor. When the temperature or load of the drive motor is too high, the power supply is automatically cut off and the circuit is disconnected, thereby achieving effective protection for the air compressor 5.

[0026] Continue to refer to Figure 4 and Figure 5 As shown, in some embodiments, the mounting bracket 1 includes a first mounting portion 12 and a second mounting portion 13 connected by a bending portion 11. The first mounting portion 12 is fixedly mounted to the valve, and the drive cylinder 2 is rotatably mounted to the second mounting portion 13. Specifically, the first mounting portion 12 is configured as a flat plate structure, and the second mounting portion 13 is configured as a U-shaped structure. The cylinder body 21 of the drive cylinder 2 is rotatably mounted into the opening slot of the U-shaped structure. This ensures both mounting rigidity and the freedom of movement of the drive cylinder 2, while also effectively balancing the driving torque through a symmetrical layout, avoiding off-center loading. The overall structure is compact and reliable, facilitating on-site installation and maintenance.

[0027] For example, the first mounting part 12 is fixed to the valve flange with bolts. (As shown) Figure 4 and Figure 5 As shown, the first mounting part 12 is provided with a center hole 121 and a mounting hole 122. When the first mounting part 12 is fixedly installed to the valve, the valve drive shaft passes through the center hole 121, the fixing hole of the valve flange is aligned with the mounting hole 122, and the mounting hole 122 is constructed as an oblong hole. This structural design allows the mounting bracket 1 to be finely adjusted within a range of ±5mm, ensuring both the alignment accuracy of the first mounting part 12 and the valve drive shaft and compensating for the installation tolerance of the valve flange. Therefore, the oblong hole structure significantly improves the fault tolerance and convenience of on-site assembly while ensuring connection strength.

[0028] For example, the second mounting part 13 includes an integrally formed L-shaped mounting plate 131 and an auxiliary mounting plate 132 detachably fixed to the L-shaped mounting plate 131 by bolts. Specifically, the L-shaped mounting plate 131 includes a vertical plate parallel to the first mounting part 12 and a horizontal base plate connected to the bottom of the vertical plate. The bent part 11 connects the first mounting part 12 and the vertical plate. A reinforcing connecting plate 14 connects the horizontal base plate to the first mounting part 12. The auxiliary mounting plate 132 is detachably fixed to the horizontal base plate. Thus, through the cooperation of the bent part 11 and the reinforcing connecting plate 14, not only is the overall structural strength of the mounting frame 1 further enhanced, but the accuracy and adjustability of the installation position of the drive cylinder 2 and the swing arm 3 are also ensured.

[0029] Continue to refer to Figure 6As shown, in some embodiments, an adjusting screw 23 is fixed to the first end of the piston push rod 22, and an adjusting nut 32 that cooperates with the adjusting screw 23 is fixed on the hinge 31. Thus, by rotating the adjusting nut 32, the size of the retraction gap can be adaptively adjusted, achieving precise control of the extension and retraction stroke of the drive cylinder 2. Furthermore, this structural design simplifies the assembly process, making the overall structure more compact and stable, and facilitating on-site installation and maintenance.

[0030] Continue to refer to Figure 6 As shown, in some embodiments, the cylinder body 21 is detachably fixed to a rotating frame 24 by bolts at its front end, and the mounting bracket 1 is provided with a through hole that mates with the rotating shaft of the rotating frame 24.

[0031] In summary, the pneumatic control system for apron pipeline valves provided by this invention includes the following assembly principle (assembly and installation in the valve closed state): The piston rod 22 is manually pushed back to retract, the rotating frame 24 is fixedly installed at the head end of the cylinder body 21, and the drive cylinder 2 is installed onto the L-shaped mounting plate 131 via the rotating frame 24; then, the auxiliary mounting plate 132 is fixed onto the L-shaped mounting plate 131 with bolts to complete the symmetrical rotational support of the drive cylinder 2; next, the hinge 31 is connected to the adjusting screw 23 at the head end of the piston rod 22 via the adjusting nut 32, and the positioning position of the adjusting nut 32 on the adjusting screw 23 is adjusted; the swing arm 3 is tilted 45 degrees... The rocker arm 3 is fixed on the valve drive shaft and connected to the hinge 31 via a pin (Y-type structure). Specifically, the connection is achieved by adjusting the nut 32 and the screw 23, which restricts the piston rod 22 to extend a certain distance before the rocker arm 3 and hinge 31 can be aligned. Therefore, after the rocker arm 3 and hinge 31 are rotated together, a certain retraction gap is established between the end of the piston rod 22 and the end of the cylinder 21's inner cavity. That is, when the piston rod 22 retracts axially into the cylinder 21 to the closed position, a retraction gap is reserved between the end of the piston rod 22 and the end of the cylinder 21's inner cavity. This retraction gap ensures that the driveable cylinder 2 can fully close the valve during the retraction process.

[0032] In the description of this invention, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0033] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. A pneumatic control system for apron pipeline valves, characterized in that, include: Mounting bracket (1) is fixedly mounted to the valve; driving cylinder (2) is rotatably mounted to the mounting bracket (1) and includes a cylinder body (21) and a piston push rod (22) that slides with the cylinder body (21); swing arm (3) is fixedly connected to the valve drive shaft at one end and rotatably connected to the piston push rod (22) through a hinge (31) at the other end, so that the swing arm (3) and the valve drive shaft swing back and forth around the central axis of the valve drive shaft as the piston push rod (22) moves back and forth; air source is connected to the driving cylinder (2) through an air supply pipeline; wherein, when the piston push rod (22) retracts into the cylinder body (21) along the axis to the closed valve position, a retraction gap is reserved between the tail end of the piston push rod (22) and the tail end of the inner cavity of the cylinder body (21).

2. The pneumatic control system for apron pipeline valves according to claim 1, characterized in that: The mounting bracket (1) includes a first mounting part (12) and a second mounting part (13) connected by a bending part (11). The first mounting part (12) is fixedly mounted to the valve, and the drive cylinder (2) is rotatably mounted to the second mounting part (13).

3. The pneumatic control system for apron pipeline valves according to claim 2, characterized in that: The first mounting part (12) is provided with a center hole (121) and a mounting hole (122). When the first mounting part (12) is fixedly installed to the valve, the valve drive shaft passes through the center hole (121), the valve fixing hole is aligned with the mounting hole (122), and the mounting hole (122) is constructed as a waist-shaped hole.

4. The pneumatic control system for apron pipeline valves according to claim 2, characterized in that: The second mounting part (13) is configured as a U-shaped structure, and the cylinder body (21) of the drive cylinder (2) is rotatably mounted into the opening groove of the U-shaped structure.

5. A pneumatic control system for apron pipeline valves according to claim 4, characterized in that: The second mounting part (13) includes an integrally formed L-shaped mounting plate (131) and an auxiliary mounting plate (132) that is detachably fixed to the L-shaped mounting plate (131) by bolts.

6. The pneumatic control system for apron pipeline valves according to claim 5, characterized in that: The L-shaped mounting plate (131) includes a vertical plate parallel to the first mounting part (12) and a horizontal base plate connected to the bottom of the vertical plate. The bent part (11) is connected between the first mounting part (12) and the vertical plate. A reinforcing connecting plate (14) is connected between the horizontal base plate and the first mounting part (12).

7. The pneumatic control system for apron pipeline valves according to claim 1, characterized in that: The piston push rod (22) has an adjusting screw (23) fixed at its head end, and an adjusting nut (32) that cooperates with the adjusting screw (23) is fixed on the hinge (31).

8. The pneumatic control system for apron pipeline valves according to claim 1, characterized in that: The cylinder body (21) has a rotating frame (24) detachably fixed at its front end by bolts, and the mounting bracket (1) has a through hole that cooperates with the rotating shaft of the rotating frame (24).

9. A pneumatic control system for apron pipeline valves according to claim 1, characterized in that: The gas source includes a pressure storage tank (4) and a regulating valve (41) connected between the outlet of the pressure storage tank (4) and the drive cylinder (2).

10. A pneumatic control system for apron pipeline valves according to claim 9, characterized in that: The air source also includes an air compressor (5) and a filter (6) connected to the air inlet end of the pressure storage tank (4) along the air inlet direction. A pressure sensor linked to the air compressor (5) is provided on the pressure storage tank (4) so ​​that the air compressor (5) starts when the air pressure in the pressure storage tank (4) is less than the low pressure threshold and stops when the air pressure in the pressure storage tank (4) is greater than the high pressure threshold.

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