Emergency transportation device for compressed liquefied gas

Abstract

The utility model relates to an emergency transportation device for compressed liquefied gas. An emergency transfer vehicle for compressing liquefied gas comprises a vehicle body, a collecting tank is arranged on the vehicle body and used for connecting a first pipeline and a second pipeline, a liquid suction pump is arranged on the first pipeline, and a compressor is arranged on the second pipeline. A switching mechanism is arranged among the output end of the driving motor, the liquid suction pump and the compressor, the switching mechanism comprises a clutch, the clutch comprises a movable part used for being in linkage with the input end of the liquid suction pump and the input end of the compressor, a first support is arranged on the vehicle body, and a swing rod assembly is rotationally fixed to the first support. The swing rod assembly is provided with a stress end and an output end, and the output end of the swing rod assembly is connected with the movable part. The utility model has the advantages of being convenient to miniaturize and lower in production and maintenance cost.

Description

Technical Field

[0001] This utility model relates to an emergency transfer device for compressed liquefied gas. Background Technology

[0002] Chinese Patent Application No. 202322028749.4 discloses a special vehicle for emergency transfer of compressed liquefied gas. The vehicle body is equipped with a collection tank and a fuel engine driven hydraulic pump station assembly. The fuel engine driven hydraulic pump station assembly includes a fuel engine and a hydraulic drive system with a hydraulic pump. The collection tank is equipped with a connector for connecting a first pipeline and a second pipeline. The first pipeline is equipped with a first quick-connect fitting at both ends, and the second pipeline is equipped with a second quick-connect fitting at both ends. The first pipeline is equipped with a first control valve, a filter, and a suction pump. The second pipeline is equipped with a second control valve and a compressor. The suction pump and the compressor are both connected to the hydraulic drive system. An electromagnetic reversing valve is provided between the hydraulic drive system and the suction pump and the compressor.

[0003] The above solution uses the vehicle's own fuel engine to drive the hydraulic pump station assembly, which in turn drives the compressor and the suction pump. When the fuel engine of the fuel engine-driven hydraulic pump station assembly starts, its internal energy is converted into mechanical energy, which in turn starts the hydraulic pump of the hydraulic drive system of the fuel engine-driven hydraulic pump station assembly. This then drives the compressor or suction pump to work, thereby transferring the material in the container of the transport vehicle in the accident into the storage tank, thus realizing the transfer of the material.

[0004] However, the above solution has the following drawbacks: it relies heavily on the vehicle's own hydraulic drive system to drive the compressor and suction pump, making it difficult to mount on a trailer and towed by human, animal, or other small vehicles. It is also difficult to exist as a standalone device. Furthermore, the hydraulic drive system requires a hydraulic oil tank, resulting in a large size and weight for the emergency transfer device, which is not conducive to miniaturization. At the same time, since the vehicle's own hydraulic drive system needs to be connected to an external compressor and suction pump, there is also the issue of sealing leaks at the connection points. Additionally, the mismatch between the design pressure of the vehicle's own hydraulic system and the working pressure of the external compressor and suction pump needs to be considered. Utility Model Content

[0005] The purpose of this invention is to provide an emergency transfer device for compressed liquefied gases that is easy to miniaturize and has lower production and maintenance costs.

[0006] To achieve the above objectives, this utility model employs an emergency transfer device for compressed liquefied gas, comprising a collection tank for connecting a first pipeline and a second pipeline. A suction pump is installed on the first pipeline, and a compressor is installed on the second pipeline. The suction pump and compressor are powered by the same drive motor. A switching mechanism is provided between the output end of the drive motor and the suction pump and compressor. The switching mechanism includes a clutch, which includes a movable part for linkage with the input end of the suction pump and the input end of the compressor. A first bracket is provided on the side of the switching mechanism, and a swing arm assembly is rotatably fixed on the first bracket. The swing arm assembly has a force-receiving end and an output end, and the output end of the swing arm assembly is connected to the movable part.

[0007] In response to the uncertainties of road accident transportation, and considering different damage conditions of the accident transport vehicle, the emergency transfer device of this utility model has three modes for transfer: compressor mode, high-pressure liquid pump mode, and dual-machine mode.

[0008] The compressor mode is suitable when the tank is in good condition and its pressure-bearing capacity has not been weakened. In this case, if the product is too hazardous to be emptied or has high value, the compressor mode allows for rapid deployment with minimal equipment, achieving the recovery of both gaseous and liquid phases. In the first stage of tank transfer, when the liquid phase ratio in the tank is high, the compressor is used to pressurize the tank, achieving pump-free transfer through pressure difference. In the second stage, most of the liquid phase components have already been transferred. The compressor creates a pressure difference to quickly transfer most of the liquid phase components. Then, the quick-connect fittings at both ends of the first pipeline are swapped to switch the compressor inlet and outlet, collecting the remaining gaseous phase components and sending them to the collection tank.

[0009] If the transport vehicle's container cannot be pressurized during an accident, a high-pressure liquid pump mode can be used. The pump quickly transfers most of the material to the receiving container, reducing on-site risks. Any remaining material in the transport vehicle's container is then discharged into the atmosphere.

[0010] When the material involved in an accident is toxic, hazardous, flammable, or explosive, and cannot be pressurized, a dual-machine mode combining a compressor and a high-pressure liquid pump can be used. First, the suction pump is used to transfer most of the material, and then the compressor is used to collect the residual gas phase from the accident container. This minimizes the risks and residual products at the scene while ensuring the safety and stability of the accident tank.

[0011] The suction pump and compressor are powered by the same drive motor, which reduces the number and complexity of power sources, reduces the complexity of hydraulic systems and related equipment, and eliminates the need for two separate drive motors to drive the suction pump and compressor, thus reducing production costs. At the same time, the simplified power system makes the entire emergency transfer device smaller, which is easier to miniaturize, transport, and use.

[0012] The clutch is used to switch power output between the suction pump and the compressor. It can be any existing clutch capable of power switching via electronic or manual control, such as a jaw clutch, friction clutch, or electromagnetic clutch. By incorporating a rocker arm assembly, the clutch can be switched manually to transmit power to the suction pump or compressor. This reduces reliance on complex electronic control systems, improves system reliability, and simplifies the mechanical structure, making maintenance and repair easier. The rocker arm assembly can also be externally driven by a small motor.

[0013] The emergency transfer device of this utility model can be a trailer towed by human, animal, or small vehicles, or it can be integrated into a small vehicle or be a standalone device. It does not require a hydraulic drive system or a hydraulic oil tank. It is small in size and weight, making it easy to miniaturize. It is suitable for complex environments and confined spaces. At the same time, it does not require the vehicle's own power system to be connected to modular components, making production more convenient. It also avoids the problems of leakage at connection points and mismatch between the design pressure of the vehicle's own hydraulic system and the working pressure of the external compressor and suction pump.

[0014] Preferably, the rocker arm assembly includes a rotating shaft rotatably connected to the first bracket, a handle fixed on the rotating shaft, one end of the handle serving as the force-bearing end, the other end of the handle being fixed to a connecting rod, the axis of the connecting rod being parallel to the axis of the rotating shaft, the opposite ends of the connecting rod respectively engaging with one end of a rocker arm, the connecting rod having a through-hole, one end of the rocker arm serving as the output end and connected to the movable part, and the other end of the rocker arm slidingly fitting within the hole.

[0015] The rocker arm assembly mainly consists of simple mechanical parts, such as a handle, a rotating shaft, a connecting rod, and a rocker arm. These components have relatively low manufacturing and maintenance costs. Furthermore, the purely mechanical structure reduces the risk of system failure due to electrical faults or hydraulic leaks. It also allows for a fixed height position at the output end of the connecting rod, enabling the clutch's moving part to switch only by axial movement. This not only ensures switching accuracy and reliability but also makes it more compatible with existing clutches on the market, reducing the need for modifications to standard clutch components. In use, the rocker arm assembly swings, applying force to the handle's force-bearing end, which in turn rotates the rotating shaft. Simultaneously, because the output end of the connecting rod is fixed in height (and the clutch's moving part only moves axially), the connecting rod slides within the mating hole of the rotating shaft.

[0016] Preferably, a fixing sleeve is fixed to each of the opposite sides of the movable part, and the two fixing sleeves are coaxially arranged. The fixing sleeves are fixed to one end of the connecting shaft by fasteners, and the other end of the connecting shaft is connected to the output end. The connecting shaft is replaceable, thereby facilitating the maintenance of the swing arm assembly.

[0017] Preferably, the output end of the swing arm is provided with a lateral through-hole, and the connecting shaft is fitted into the connecting hole away from the fixed sleeve. The outer edge of the cross section of the end of the connecting shaft away from the fixed sleeve and the inner edge of the cross section of the connecting hole are both circular.

[0018] Preferably, the drive motor is provided with a linkage shaft, which is rotatably fixed to the second bracket. The linkage shaft is provided with a clutch in the middle, and a linkage wheel is provided on each of the two axial sides of the clutch. The two linkage wheels are respectively linked to the input end of the liquid suction pump and the input end of the compressor. The linkage wheel is rotatably fixed to the linkage shaft, and the movable part of the clutch moves axially to link with one of the two linkage wheels.

[0019] This invention has the advantages of being easy to miniaturize and having lower production and maintenance costs. Attached Figure Description

[0020] Figure 1 This is a schematic diagram illustrating the principle of this utility model.

[0021] Figure 2 This is a schematic diagram of the structure at the output end of the drive motor of this utility model.

[0022] Figure 3 This is a cross-sectional view of the rocker arm assembly of this utility model.

[0023] Figure 4 This is a schematic diagram of the connection between the rocker arm and the moving part of the clutch in this utility model. Detailed Implementation

[0024] The present invention will now be further described with reference to the accompanying drawings and specific embodiments.

[0025] Depend on Figure 1 As shown, this embodiment discloses an emergency transfer device for compressed liquefied gas, integrated on a vehicle body. The vehicle body (not shown in the figure) is equipped with a collection tank (not shown in the figure). The collection tank is equipped with a connector for connecting a first pipeline 100 and a second pipeline 200. The first pipeline 100 is equipped with a first quick-connect fitting 11 at both ends, and the second pipeline 200 is equipped with a second quick-connect fitting 21 at both ends. The first pipeline 100 is equipped with a first control valve 12, a filter 13 and a suction pump 14 in sequence from upstream to downstream. The second pipeline 200 is equipped with a second control valve 22 and a compressor 23 in sequence from downstream to upstream. The suction pump 14 and the compressor 23 are powered by the same drive motor 300. A switching mechanism 400 for switching the output force is provided between the output end of the drive motor 300 and the suction pump 14 and the compressor 23.

[0026] The first pipeline 100 is also provided with a first branch pipe 101, with its two ends located upstream and downstream of the suction pump 14, respectively. The upstream end of the first branch pipe 101 is connected between the first quick-connect fitting 11 and the first control valve 12, and a third control valve 15 is provided on the first branch pipe 101. A first pipeline safety valve 16 and a first pressure gauge 17 are provided on the downstream side of the first pipeline 100. The first pipeline safety valve 16 and the first pressure gauge 17 are respectively connected to the first pipeline 100 through a third branch pipe. A fifth control valve 18 is provided on both third branch pipes, and a sixth control valve 19 is provided on the downstream end of the first pipeline 100.

[0027] The second pipeline 200 is also equipped with a second branch pipe 201, with its two ends connected to the upstream and downstream ends of the compressor 23, respectively. A fourth control valve 24 is installed on the second branch pipe 201. A second pipeline safety valve 25 and a second pressure gauge 26 are installed downstream of the second pipeline 200. The second pipeline safety valve 25 and the second pressure gauge 26 are each connected to the second pipeline 200 via a fourth branch pipe. A seventh control valve 27 is installed on each of the four fourth branch pipes, and an eighth control valve 28 is installed downstream of the second pipeline 200. The inlet ends of both fourth branch pipes are located between the eighth control valve 28 and the second control valve 22. In this embodiment, both ends of the first and second pipelines are flexible hoses. The control valves on the first, second, first, and second branch pipes are ball valves, while the control valves on the third and fourth branch pipes are shut-off valves.

[0028] In response to the uncertainties of road accident transportation, this utility model's special vehicle can operate in three modes—compressor mode, high-pressure liquid pump mode, and dual-machine mode—to transport goods under different damage conditions of the accident transport vehicle.

[0029] When the transport vehicle container is in good condition during an accident, its pressure-bearing capacity is not weakened, and the material is highly hazardous and unsuitable for venting, the compressor mode can be used. The compressor creates a pressure difference to quickly transfer most of the liquid phase components. Then, the two quick-connect fittings on the first pipeline are swapped to switch the compressor inlet and outlet, collecting the remaining gaseous components and sending them to the receiving container.

[0030] If the transport vehicle's container cannot be pressurized during an accident, a high-pressure liquid pump mode can be used. By using a suction pump, most of the material is quickly transferred to a receiving container, reducing on-site risks. Any remaining material in the transport vehicle's container is then discharged into the atmosphere.

[0031] When the material involved in an accident is toxic, hazardous, flammable, or explosive, and pressurization is not possible, a dual-machine mode combining a compressor and a high-pressure liquid pump can be used. First, the suction pump is used to transfer most of the material, and then the compressor is used to collect the remaining gaseous phase from the accident container.

[0032] Depend on Figure 2and Figure 3 As shown, the switching mechanism 400 includes a clutch 401, and the drive motor 300 has a linkage shaft 301. The two ends of the linkage shaft 301 are rotatably fixed to the second bracket 500. The clutch 401 is located in the middle of the linkage shaft 301. A linkage wheel 302 is provided on each of the two axial sides of the clutch 401. The two linkage wheels 302 are respectively linked to the input end of the suction pump 14 and the input end of the compressor 23 through a conveyor belt. The linkage wheels 302 are rotatably fixed to the linkage shaft 301 through bearings. The movable part of the clutch 401 moves axially to be linked with one of the two linkage wheels. In this embodiment, the drive motor 300 is an explosion-proof motor, and the clutch 401 is a jaw clutch. The cooperation structure between the clutch 401 and the linkage wheel 302 and the connection structure between the clutch 401 and the linkage shaft 301 are existing structures and will not be described in detail.

[0033] Depend on Figure 2 and Figure 3 As shown, a first bracket 600 is provided on the vehicle body, and a rocker arm assembly is rotatably fixed on the first bracket 600. The rocker arm assembly has a force-receiving end and an output end, and the output end of the rocker arm assembly is connected to the movable part of the clutch 401. The rocker arm assembly includes a rotating shaft 402 rotatably connected to the first bracket 600, and a handle 403 is fixed on the rotating shaft 402. The upper end of the handle 403 serves as the force-receiving end, and the lower end of the handle 403 is fixed to a connecting rod 404. The axis of the connecting rod 404 is parallel to the axis of the rotating shaft 402. The two opposite ends of the connecting rod 404 respectively mate with one end of a rocker arm 405. The connecting rod 404 has a through-hole. One end of the rocker arm 405 is the output end and is connected to the movable part of the clutch 401. The upper part of the rocker arm 405 slides within the through-hole. A nut 406 is provided at the upper end of the rocker arm 405, and the stroke and swing range can be adjusted by adjusting the position of the nut 406 on the rocker arm 405.

[0034] Depend on Figure 4 As shown, a fixed sleeve 407 is fixed to each of the opposite sides of the movable part of the clutch 401. The two fixed sleeves 407 are coaxially arranged. The fixed sleeves 407 are fixed to one end of the connecting shaft 409 by fasteners. The fixed sleeves 407 and the connecting shaft 409 are provided with fixing holes 408 for mating with the fasteners. The other end of the connecting shaft 409 is connected to the output end (lower end) of the rocker arm 405. The output end of the rocker arm 405 is provided with a lateral through-hole linkage hole. The connecting shaft 409, away from the fixed sleeves 407, fits into the linkage hole. The outer edge of the cross-section of the end of the connecting shaft 409 away from the fixed sleeves and the inner edge of the cross-section of the linkage hole are both circular.

[0035] This embodiment has the advantages of easy miniaturization and lower production and maintenance costs.

Claims

1. An emergency transfer device for compressed liquefied gas, comprising a collection tank for connecting a first pipeline and a second pipeline, wherein a suction pump is provided on the first pipeline and a compressor is provided on the second pipeline, characterized in that: The suction pump and compressor are powered by the same drive motor. A switching mechanism is provided between the output end of the drive motor and the suction pump and compressor. The switching mechanism includes a clutch, which includes a movable part for linkage with the input end of the suction pump and the input end of the compressor. A first bracket is provided on the side of the switching mechanism. A rocker arm assembly is rotatably fixed on the first bracket. The rocker arm assembly has a force-receiving end and an output end. The output end of the rocker arm assembly is connected to the movable part.

2. The emergency transfer device for compressed liquefied gas according to claim 1, characterized in that: The swing arm assembly includes a rotating shaft rotatably connected to the first bracket. A handle is fixed on the rotating shaft. One end of the handle serves as the force-bearing end, and the other end of the handle is fixed to a connecting rod. The axis of the connecting rod is parallel to the axis of the rotating shaft. The two opposite ends of the connecting rod are respectively engaged with one end of a swing arm. The connecting rod has a through-hole. One end of the swing arm is the output end and is connected to the movable part. The other end of the swing arm is slidably fitted into the through-hole.

3. The emergency transfer device for compressed liquefied gas according to claim 2, characterized in that: The movable part is fixed with a fixed sleeve on each of its opposite sides. The two fixed sleeves are coaxially arranged. The fixed sleeves are fixed to one end of the connecting shaft by fasteners. The other end of the connecting shaft is connected to the output end.

4. The emergency transfer device for compressed liquefied gas according to claim 3, characterized in that: The output end of the swing arm is provided with a lateral through-hole linkage hole. The connecting shaft, away from the fixed sleeve, fits into the linkage hole. The outer edge of the cross section of the end of the connecting shaft away from the fixed sleeve and the inner edge of the cross section of the linkage hole are both circular.

5. The emergency transfer device for compressed liquefied gas according to claim 1, characterized in that: The drive motor is provided with a linkage shaft, which is rotatably fixed to the second bracket. The linkage shaft is provided with a clutch in the middle. A linkage wheel is provided on each of the two axial sides of the clutch. The two linkage wheels are respectively linked to the input end of the liquid suction pump and the input end of the compressor. The linkage wheels are rotatably fixed to the linkage shaft. The movable part of the clutch moves axially to link with one of the two linkage wheels.

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