Expansion valve indicating pneumatic flipper

Abstract

The utility model discloses expansion valve indicating pneumatic turnover board relates to warning device technical field, including clamping frame and removal subassembly, clamping frame: the upper side is provided with the opening, the inside installation of opening has warning subassembly, the downside of opening is provided with the upper layer board, the downside of upper layer board is provided with the middle layer board, the right -hand tip of middle layer board and upper layer board upside respectively is provided with first strip mouth and second strip mouth, the downside of middle layer board is provided with fixed frame, fixed frame, middle layer board and upper layer board are connected with the downside of clamping frame through three bolts, the downside of middle layer board is installed with turnover subassembly, the left side boundary portion of middle layer board and upper layer board is installed with extrusion subassembly, can realize and the pure mechanical type pneumatic linkage of expansion valve in the drain hole, provide a kind of external power without, reliability is high and can be directly observed from outside, real-time reflection valve body working condition's field indicating scheme.

Description

Technical Field

[0001] This utility model relates to the field of warning equipment technology, specifically to an expansion valve-indicating pneumatic flip sign. Background Technology

[0002] In bridge engineering, especially in bridges involving the transportation of hazardous chemicals, monitoring and warning of road surface drainage holes is a crucial safety aspect. Current technology typically involves installing remotely controlled expansion valves inside the drainage holes to quickly seal them in the event of a hazardous chemical leak, preventing the spread of contaminants. However, these expansion valves are usually installed in concealed locations such as inside the drainage holes or below the bridge deck, making their operational status (e.g., whether sealing has been initiated) difficult to observe directly from the outside. Current indication methods often rely on electronic sensors or remote signal feedback. While these methods provide status information, they often require dedicated power supplies and communication lines, which are susceptible to weather, aging wiring, or electromagnetic interference in the complex outdoor environment of bridges, posing a challenge to reliability. Furthermore, some simple mechanical indicating devices lack direct linkage with the valve body's movement, failing to provide real-time and intuitive feedback on the actual status of the expansion valve at a specific drainage hole, causing inconvenience for daily inspections and emergency response.

[0003] The main shortcoming of existing indicating technologies lies in the balance between visibility and reliability. On the one hand, purely mechanical indicators often lack automatic linkage with valve body movements, requiring manual intervention or additional triggering, and cannot achieve autonomous, immediate warnings of accident conditions. On the other hand, although electronic monitoring methods can achieve remote status feedback, their systems are complex and costly, and rely on continuous power supply and signal transmission, potentially failing under harsh conditions or power outages, creating safety hazards. Especially when multiple drain holes are distributed in different areas, existing technologies struggle to provide a low-power, highly reliable, and intuitively corresponding field indication solution for specific drain hole locations. Furthermore, most existing indicating devices do not consider the external visibility of valve body malfunctions, making it difficult for maintenance personnel to quickly determine whether the expansion valve is in an abnormal state based on appearance, thus affecting maintenance efficiency and emergency response speed. Therefore, we propose a pneumatic flip-type expansion valve indicator. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the existing defects and provide an expansion valve indicator pneumatic flip sign that can realize pure mechanical pneumatic linkage with the expansion valve in the drain hole. It provides a field indication solution that does not require external power, has high reliability, and can intuitively and in real time reflect the working status of the valve body from the outside, which can effectively solve the problems in the background technology.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an expansion valve indicator pneumatic flip sign, including a snap-fit ​​frame and a moving component; The snap-fit ​​frame has an opening on the upper side, and a warning component is installed inside the opening. An upper plate is provided below the opening, and a middle plate is provided below the upper plate. The upper right ends of the middle plate and the upper plate have a first strip-shaped opening and a second strip-shaped opening, respectively. A fixing frame is provided below the middle plate. The fixing frame, the middle plate, and the upper plate are connected to the lower side of the snap-fit ​​frame by three bolts. A flipping component is installed below the middle plate. A pressing component is installed on the left side of the middle plate and the upper plate. The snap-fit ​​frame is connected to the road edge of the bridge deck guardrail. The moving component includes a first lifting lug, a connecting ring, a square rod, a miniature cylinder, and a U-shaped frame. Two corresponding first lifting lugs are welded to the lower left end of the middle layer plate. The side of the first lifting lug is provided with a mounting hole. A square rod is provided inside the mounting hole. A connecting ring is fixed between the two square rods. A miniature cylinder is fixed inside the connecting ring by a retaining spring. A U-shaped frame is threaded onto the piston rod of the miniature cylinder. The right end of the U-shaped frame is connected to the flipping component. The moving component drives the left end of the flipping bar to move. In use, the square rod can be replaced with a round shaft.

[0006] Furthermore, the warning assembly includes a connecting shaft and a warning plate. The connecting shaft is rotatably connected to the opening on the upper side of the snap-fit ​​frame. Warning plates are fixed to the upper and right ends of the circumferential surface of the connecting shaft. During normal use, the right side of the upper warning plate is coated with green paint, and the lower side of the right warning plate is coated with red dye. When a warning is required, the two warning plates are flipped by the flip bar so that the right warning plate rotates to the upper end of the connecting shaft.

[0007] Furthermore, the flipping assembly includes a second lifting lug, a flipping strip, a rotating shaft, and a weight-reducing hole. Two corresponding second lifting lugs are welded to the middle of the lower side of the middle layer plate, and a flipping strip is provided between the two second lifting lugs. Rotating shafts are fixed on both the front and rear sides of the flipping strip, and the two rotating shafts are rotatably connected to the inside of the two second lifting lugs. The left end of the flipping strip is rotatably connected to the inside of the U-shaped frame, and the right end of the flipping strip is located inside the first and second strip openings. The right end of the flipping strip corresponds to the warning plate on the right side. The two warning plates can be switched by setting the flipping assembly in conjunction with the moving assembly.

[0008] Furthermore, the extrusion assembly includes a fixed barrel, a rubber head, and a spring. The left side of both the middle plate and the upper plate is provided with a fixing hole. The fixed barrel is fixed inside the two fixing holes. The rubber head is slidably connected inside the fixed barrel. The lower end of the rubber head is fixed with a spring. The spring is fixed inside the fixed barrel. By setting the extrusion assembly, the two warning plates can be quickly reset when no warning is needed.

[0009] Furthermore, two corresponding rubber pads are fixed to the right end of the upper side of the snap-fit ​​frame. Both rubber pads are in contact with the warning plate on the right side. By setting the two rubber pads, the warning plate on the right side is supported to prevent damage.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows: This expansion valve indicating pneumatic flip sign has the following advantages: 1. Through pneumatic linkage design, a direct mechanical connection with the expansion valve inside the bridge deck drainage hole is achieved, thereby automatically triggering a flipping action in the event of a hazardous chemical leak, changing the sign color from green to red, providing an immediate and intuitive on-site warning. This design effectively overcomes the vulnerability of traditional electronic indication methods that rely on power supply and signal transmission, avoiding the risk of failure due to severe weather, aging lines, or electromagnetic interference. It significantly improves the reliability and anti-interference capability in the complex environment of outdoor bridges, and can autonomously reflect the status of specific drainage holes without additional manual intervention, enhancing the real-time nature and intuitiveness of safety management.

[0011] 2. The optimized mechanical structure of this flip sign not only ensures smooth return under normal working conditions, but also indirectly exposes potential faults in the expansion valve through changes in resistance during the flipping action, such as valve body leakage or poor air intake. When the expansion valve is abnormal, the difficulty in flipping the sign can serve as an external manifestation, directly reminding maintenance personnel to locate the fault point. This simplifies the daily inspection and maintenance process, reduces the complexity and cost of system maintenance, thereby accelerating emergency response speed and improving the efficiency and resilience of overall bridge safety management. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the front structure of this utility model; Figure 2 This is a schematic diagram of the structure of the mobile component of this utility model; Figure 3 This is a schematic diagram of the extrusion assembly structure of this utility model; Figure 4 This is a schematic diagram of the warning component structure of this utility model.

[0013] In the diagram: 1. Clip-on frame; 2. Moving component; 21. First lifting lug; 22. Connecting ring; 23. Square rod; 24. Miniature cylinder; 25. U-shaped frame; 3. Flipping component; 31. Second lifting lug; 32. Flipping strip; 33. Rotating shaft; 34. Weight reduction hole; 4. Warning component; 41. Connecting shaft; 42. Warning plate; 5. Extrusion component; 51. Fixed bucket; 52. Rubber head; 53. Spring; 6. Rubber pad; 7. Upper plate; 8. Middle plate; 9. First strip opening; 10. Second strip opening; 11. Fixed frame; 12. Bolt. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] Please see Figure 1-4 This embodiment provides a technical solution: an expansion valve indicator pneumatic flip plate, including a snap-fit ​​frame 1 and a moving component 2; The snap-fit ​​frame 1 has an opening on its upper side, inside which a warning component 4 is installed. An upper layer plate 7 is located below the opening, and a middle layer plate 8 is located below the upper layer plate 7. The upper right ends of the middle layer plate 8 and the upper layer plate 7 have a first strip-shaped opening 9 and a second strip-shaped opening 10, respectively. A fixing frame 11 is located below the middle layer plate 8. The fixing frame 11, the middle layer plate 8, and the upper layer plate 7 are connected to the lower side of the snap-fit ​​frame 1 by three bolts 12. A flipping component 3 is installed below the middle layer plate 8, and a pressing component 5 is installed on the left side of the middle layer plate 8 and the upper layer plate 7. Warning assembly 4 includes a connecting shaft 41 and a warning plate 42. The connecting shaft 41 is rotatably connected to the opening on the upper side of the snap-fit ​​frame 1. The warning plate 42 is fixed to the upper and right ends of the circumferential surface of the connecting shaft 41. The flipping assembly 3 includes a second lifting lug 31, a flipping strip 32, a rotating shaft 33, and a weight reduction hole 34. Two corresponding second lifting lugs 31 are welded to the middle of the lower side of the middle layer plate 8. A flipping strip 32 is provided between the two second lifting lugs 31. A rotating shaft 33 is fixed to both the front and rear sides of the flipping strip 32. The two rotating shafts are rotatably connected to the two second lifting lugs 31. Inside, the left end of the flip bar 32 is rotatably connected to the inside of the U-shaped frame 25, and the right end of the flip bar 32 is located inside the first strip opening 9 and the second strip opening 10. The right end of the flip bar 32 corresponds to the warning plate 42 on the right side. The extrusion assembly 5 includes a fixed barrel 51, a rubber head 52, and a spring 53. The left side of the middle plate 8 and the upper plate 7 are provided with fixing holes. The fixed barrel 51 is fixed inside the two fixing holes. The rubber head 52 is slidably connected inside the fixed barrel 51. The lower end of the rubber head 52 is fixed with a spring 53. The spring 53 is fixed. Inside the fixed bucket 51, the squeezing component 5 is set to quickly reset the two warning plates 42 when no warning is needed. The flipping component 3 and the moving component 2 are set to switch the two warning plates 42. During normal use, the right side of the upper warning plate 42 is painted with green paint and the lower side of the right warning plate 42 is painted with red dye. When a warning is needed, the flipping strip 32 flips the two warning plates 42 so that the right warning plate 42 rotates to the upper end of the connecting shaft 41. The snap-fit ​​frame 1 is set to connect to the road edge of the bridge guardrail. The moving component 2 includes a first lifting lug 21, a connecting ring 22, a square rod 23, a miniature cylinder 24, and a U-shaped frame 25. Two corresponding first lifting lugs 21 are welded to the lower left side of the middle layer plate 8. The side of the first lifting lug 21 is provided with a mounting hole. The square rod 23 is provided inside the mounting hole. The connecting ring 22 is fixed between the two square rods 23. The miniature cylinder 24 is fixed inside the connecting ring 22 by a snap ring. The piston rod of the miniature cylinder 24 is threadedly connected to the U-shaped frame 25. The right end of the U-shaped frame 25 is connected to the flipping component 3. The moving component 2 drives the left end of the flipping bar 32 to move. When in use, the square rod 23 can be replaced with a round shaft.

[0016] Specifically, two corresponding rubber pads 6 are fixed on the right side of the upper side of the snap-fit ​​frame 1. Both rubber pads 6 are in contact with the warning plate 42 on the right side. By setting the two rubber pads 6, the warning plate 42 on the right side is supported to prevent it from being damaged.

[0017] The dimensions of the warning plate 42, the miniature cylinder 24, the internal spring dimensions of the miniature cylinder 24, the tension, the pitch, the diameter, etc. are accurately customized according to the dimensions of the expansion valve to ensure that the system is functioning normally.

[0018] The working principle of the pneumatic flip-up expansion valve indicator provided by this utility model is as follows: Under normal working conditions, the gas output from the external air pump mainly flows to the remotely controlled pneumatic expansion valve installed inside the drain hole on the bridge deck. When the monitoring system detects a hazardous chemical leak, it sends a signal to trigger the expansion valve to operate. At this time, the gas supplied by the air pump causes the expansion valve body to expand, thereby blocking the drain hole channel. Simultaneously, a branch air path led out from the air pump synchronously delivers gas to the tail port of the miniature cylinder 24. After receiving the gas pressure, the piston rod of the miniature cylinder 24 extends outward. This linear movement is controlled by a screw... The U-shaped frame 25, connected to the end of the miniature cylinder arm, transmits power to the flipping assembly 3. The left end of the flipping bar 32 of the flipping assembly 3 is hinged to the U-shaped frame 25, and its middle part is rotatably connected to the second lifting lug 31 fixed on the middle plate 8 via a rotating shaft 33. Therefore, when the left end is pushed, the flipping bar 32 will act as a lever and rotate around the rotating shaft 33, while its right end will lift upward, passing through the first strip opening 9 on the middle plate 8 and the second strip opening 10 on the upper plate 7, and directly acting on the warning plate 42 on the right side of the warning assembly 4. The warning plate 42 is fixed on the rotatable connecting shaft 41 and is pushed by the top of the flipping bar 32. Then, the connecting shaft 41 drives the two warning plates 42 to flip together, causing the upper plate, which originally displayed green indicating a safe state, to change to red indicating an alarm state, thus achieving a clear and identifiable status indication from a distance. When the danger is over, the control system cuts off the air pump's air supply to the expansion valve, and the internal pressure of the expansion valve is released to return to its original state. The branch air circuit of the connected miniature cylinder 24 is also depressurized. After the air pressure disappears, the piston rod of the miniature cylinder 24 loses its thrust. At this time, the compression assembly 5 installed on the left side of the middle plate 8 and the upper plate 7 begins to function, and the spring 53 inside releases the accumulated elasticity. Potential energy propels the rubber head 52 upward, providing an auxiliary force for the reset of the flip bar 32, causing the flip bar 32 to rotate back to its original position, thereby driving the warning plate 42 to flip back to the initial green safety display state. The entire air circuit connection design ensures real-time and reliable linkage between the expansion valve action and the flip plate indication. Furthermore, the system structure is simplified by using an air pump as a common power source. In addition, this direct mechanical linkage mechanism can also provide on-site inspection personnel with intuitive external fault diagnosis clues by observing whether the flip plate can flip normally and smoothly when the expansion valve itself malfunctions, such as when air leakage leads to insufficient air pressure.

[0019] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. An expansion valve-indicating pneumatic flip-up sign, characterized in that: Includes a snap-fit ​​frame (1) and a moving component (2); The snap-fit ​​frame (1) has an opening on the upper side, and a warning component (4) is installed inside the opening. An upper plate (7) is provided on the lower side of the opening. A middle plate (8) is provided on the lower side of the upper plate (7). A first strip-shaped opening (9) and a second strip-shaped opening (10) are respectively provided on the right side of the upper side of the middle plate (8) and the upper plate (7). A fixing frame (11) is provided on the lower side of the middle plate (8). The fixing frame (11), the middle plate (8) and the upper plate (7) are connected to the lower side of the snap-fit ​​frame (1) by three bolts (12). A flipping component (3) is installed on the lower side of the middle plate (8). A pressing component (5) is installed on the left side of the middle plate (8) and the upper plate (7). The moving component (2) includes a first lifting lug (21), a connecting ring (22), a square rod (23), a miniature cylinder (24), and a U-shaped frame (25). Two corresponding first lifting lugs (21) are welded to the lower left side of the middle plate (8). The side of the first lifting lug (21) is provided with a mounting hole. The inside of the mounting hole is provided with a square rod (23). A connecting ring (22) is fixed between the two square rods (23). The inside of the connecting ring (22) is fixed with a miniature cylinder (24) by a snap ring. The piston rod of the miniature cylinder (24) is threadedly connected to the U-shaped frame (25). The right end of the U-shaped frame (25) is connected to the flipping component (3).

2. The pneumatic flip-up indicator plate of the expansion valve according to claim 1, characterized in that: The warning component (4) includes a connecting shaft (41) and a warning plate (42). The connecting shaft (41) is rotatably connected to the opening on the upper side of the snap-fit ​​frame (1). The warning plate (42) is fixed to the upper and right ends of the circumferential surface of the connecting shaft (41).

3. The pneumatic flip-up indicator plate of the expansion valve according to claim 2, characterized in that: The flipping assembly (3) includes a second lifting lug (31), a flipping strip (32), a rotating shaft (33), and a weight reduction hole (34). Two corresponding second lifting lugs (31) are welded to the middle of the lower side of the middle layer plate (8). A flipping strip (32) is provided between the two second lifting lugs (31). A rotating shaft (33) is fixed on both the front and rear sides of the flipping strip (32). The two rotating shafts are rotatably connected to the inside of the two second lifting lugs (31). The left end of the flipping strip (32) is rotatably connected to the inside of the U-shaped frame (25). The right end of the flipping strip (32) is located inside the first strip opening (9) and the second strip opening (10). The right end of the flipping strip (32) corresponds to the warning plate (42) on the right side.

4. The pneumatic flip-up expansion valve indicator according to claim 1, characterized in that: The extrusion assembly (5) includes a fixed barrel (51), a rubber head (52) and a spring (53). The left side of the middle plate (8) and the upper plate (7) are provided with fixing holes. The fixed barrel (51) is fixed inside the two fixing holes. The rubber head (52) is slidably connected inside the fixed barrel (51). The lower end of the rubber head (52) is fixed with a spring (53). The spring (53) is fixed inside the fixed barrel (51).

5. The pneumatic flip-up indicator plate of the expansion valve according to claim 2, characterized in that: Two corresponding rubber pads (6) are fixed on the right side of the upper side of the snap-fit ​​frame (1), and both rubber pads (6) are attached to the warning plate (42) on the right side.

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