High-level test gas circuit system for tanker refueling vehicle

Abstract

The present invention provides a high-level liquid test gas circuit system for a tanker refueling vehicle that can ensure the safety of the oil loading operation of the refueling vehicle and is convenient for observation. A high-level liquid control valve with a test function is provided at the top of the oil tank, and an oil loading bottom valve is provided at the bottom. The air inlet and the test port of the high-level liquid control valve with a test function are communicated with the gas source, and the working port is connected to the air inlet of the oil loading bottom valve through a pipeline. A first automatic reset valve is provided on the pipeline between the high-level liquid control valve with a test function and the oil loading bottom valve. The air inlet of the first automatic reset valve is communicated with the working port of the high-level liquid control valve with a test function, and the working port is communicated with the air inlet of the oil loading bottom valve. When gas enters the test port, if the valve port cannot be opened by pulling the handle, it indicates that there is no gas at the air inlet of the first automatic reset valve, that is, the high-level liquid control valve with a test function has normal performance; if the handle can be pulled to open the valve port, it indicates that there is gas at the air inlet of the first automatic reset valve, that is, the high-level liquid control valve with a test function has malfunctioned.

Description

Technical Field

[0001] The present invention relates to the technical field of tanker refueling vehicles, and particularly relates to a high-level test gas circuit system for a tanker refueling vehicle. Background Art

[0002] A tanker is a common refueling and oil transportation device, and the principle is as follows: When an external device fills oil into an oil tank, in order to prevent potential safety hazards caused by overfilling and overflowing of the oil tank, a high-level valve is installed at the top of the oil tank to directly control the opening and closing of the bottom filling valve. The liquid level control performance of the high-level valve not only determines whether the filling operation can run normally, but also concerns the safety of the filling operation. Therefore, it is necessary to regularly check the function of the high-level valve. For safety reasons, it is desired to conduct inspection and testing when the oil tank is not full.

[0003] To solve the above problems, the Chinese patent application named "High-level Valve with Testing Function" (application number 202011038290.0) discloses the following technical solution: A high-level control valve with a testing function. When the fuel in the oil tank is not full and it is necessary to test whether the performance of the high-level control valve is normal, the test port can be directly connected to the gas source on the tanker. The elastic force of the second spring is used to simulate the buoyancy of the float to drive the float. If the float fails to drive the valve core assembly to act, the bottom filling valve cannot be controlled to close, indicating that the high-level control valve fails and needs to be repaired; if the float can drive the valve core assembly to act and can control the bottom filling valve to close, it indicates that the performance of the high-level control valve is normal. How to apply this high-level control valve to the test gas circuit and control the opening and closing of the bottom filling valve is an urgent problem to be solved. Summary of the Invention

[0004] The purpose of the present invention is to provide a high-level test gas circuit system for a tanker refueling vehicle that can ensure the safety of the filling operation of the tanker refueling vehicle and is convenient for observation.

[0005] To achieve the above purpose, the technical solution adopted by the present invention is: A high-level test gas circuit system for a tanker refueling vehicle, including an oil tank. A high-level control valve with a testing function is arranged at the top of the oil tank, and a bottom filling valve is arranged at the bottom. The air inlet and the test port of the high-level control valve with a testing function are communicated with the gas source, and the working port is connected to the air inlet of the bottom filling valve through a pipeline. A first automatic reset valve is arranged on the pipeline between the high-level control valve with a testing function and the bottom filling valve. The air inlet of the first automatic reset valve is communicated with the working port of the high-level control valve with a testing function, and the working port of the first automatic reset valve is communicated with the air inlet of the bottom filling valve. The first automatic reset valve includes a handle. The inner end of the handle protrudes into the valve cavity and is provided with a sealing plug for sealing the valve port. When there is no air at the air inlet of the first automatic reset valve, the spring drives the sealing plug to seal the valve port; when there is air at the air inlet of the first automatic reset valve, the handle is pulled outwards to open the valve port.

[0006] In the above solution, when gas enters the test port, if the valve port cannot be opened by pulling the handle, it indicates that there is no gas at the air inlet of the first automatic reset valve, that is, the high liquid level control valve with test function has normal performance; if the handle can be pulled to open the valve port, it indicates that there is gas at the air inlet of the first automatic reset valve, that is, the high liquid level control valve with test function has malfunctioned. Description of the Drawings

[0007] Figure 1 It is a single-bin high liquid level test gas circuit system;

[0008] Figure 2 It is an independent gas supply type multi-bin high liquid level test gas circuit system;

[0009] Figure 3 It is a shared gas supply type multi-bin high liquid level test gas circuit system. Detailed Implementation Manner

[0010] Such as Figure 1As shown in the figure, a high-level liquid test gas circuit system for a tanker truck includes an oil tank 10. A high-level liquid control valve 20 with a test function is provided at the top of the oil tank 10, and an oil filling bottom valve 30 is provided at the bottom. The air inlet P and the test port Z of the high-level liquid control valve 20 with a test function are communicated with the air source, and the working port A is connected to the air inlet of the oil filling bottom valve 30 through a pipeline. A first automatic reset valve 51 is provided on the pipeline between the high-level liquid control valve 20 with a test function and the oil filling bottom valve 30. The air inlet a of the first automatic reset valve 51 is communicated with the working port A of the high-level liquid control valve 20 with a test function, and the working port b of the first automatic reset valve 51 is communicated with the air inlet of the oil filling bottom valve 30. The first automatic reset valve 51 includes a handle 511. The inner end of the handle 511 extends into the valve cavity and is provided with a sealing plug for sealing the valve port. When there is no air at the air inlet a of the first automatic reset valve 51, the spring drives the sealing plug to seal the valve port; when there is air at the air inlet a of the first automatic reset valve 51, the handle 511 is pulled outwards to open the valve port. When the test port Z of the high-level liquid control valve 20 with a test function is connected to the air source, the buoyancy of the float is simulated by the elastic force of the second spring inside it to drive the float. If the float can drive the valve core assembly to act, then the gas introduced from the air inlet P cannot come out from the working port A. That is to say, there is no air at the air inlet a of the first automatic reset valve 51. Due to the elastic force of the spring, the handle 511 cannot open the valve port, indicating that the high-level liquid control valve 20 with a test function has normal performance; if the float fails to drive the valve core assembly to act, then the gas introduced from the air inlet P can come out from the working port A. That is to say, there is air at the air inlet a of the first automatic reset valve 51, and the handle 511 can move outwards and open the valve port, indicating that the high-level liquid control valve 20 with a test function has malfunctioned and needs to be repaired. Conversely, after introducing gas into the test port Z of the high-level liquid control valve 20 with a test function, if the handle 511 can be pulled to open the valve port of the first automatic reset valve 51, it indicates that there is air at the air inlet a of the first automatic reset valve 51, that is, the high-level liquid control valve 20 with a test function has malfunctioned; if the handle 511 cannot be pulled to open the valve port of the first automatic reset valve 51, it indicates that there is no air at the air inlet a of the first automatic reset valve 51, that is, the high-level liquid control valve 20 with a test function has normal performance. Here, only by checking whether the handle 511 of the first automatic reset valve 51 can be pulled to open the valve port, the performance of the high-level liquid control valve 20 with a test function can be judged. The operation is simple, easy to observe and the conclusion is accurate.

[0011] Further, the system further includes a second automatic reset valve 40. The air inlet c of the second automatic reset valve 40 and the air inlet P of the high liquid level control valve 20 with a test function are both communicated with the same air source through pipelines. The working port d of the second automatic reset valve 40 is communicated with the test port Z of the high liquid level control valve 20 with a test function. The first and second automatic reset valves 51 and 40 have the same structure. The air inlet c of the second automatic reset valve 40 is directly communicated with the air source. Therefore, as long as gas is introduced, the handle 521 of the second automatic reset valve 40 can always open the valve port of the second automatic reset valve 40. When a test is required, pulling the handle 41 of the second automatic reset valve 40 can open the second automatic reset valve 40, and gas can enter the test port Z. Pulling the handle 511 of the first automatic reset valve 51 can detect the performance of the high liquid level control valve 20 with a test function. When it is known that the high liquid level control valve 20 with a test function has normal performance (at this time, as long as air source is introduced into the air inlet P of the high liquid level control valve 20 with a test function, pulling the handle 511 of the first automatic reset valve 51 can open its valve port), there is no need to operate the second automatic reset valve 40 (at this time, due to the automatic reset function of the second automatic reset valve 40, its valve port is closed and gas will not enter the test port Z). At this time, the entire gas circuit is only the gas circuit for normal oil filling. Pulling the handle 511 of the first automatic reset valve 51 to open its valve port, the high liquid level control valve 20 with a test function can control the oil filling bottom valve 30 to perform normal oil filling operations.

[0012] To control the on-off of the air source, a third automatic reset valve 52 is provided on the pipeline between the air inlet P of the high liquid level control valve 20 with a test function and the air source. The air inlet e of the third automatic reset valve 52 is communicated with the air source. The working port f of the third automatic reset valve 52 is communicated with the air inlet P of the high liquid level control valve 20 with a test function and the air inlet c of the second automatic reset valve (40) through pipelines. The function of the third automatic reset valve 52 here is to control the on-off switch of the air source of the entire system. The high liquid level control valve 20 with a test function and the second automatic reset valve 40 are communicated with the same air source. As long as one third automatic reset valve 52 is operated, the on-off of the air source of the two valves, namely the high liquid level control valve 20 with a test function and the second automatic reset valve 40, can be controlled. There is no need to separately set two switch valves, with fewer components and fewer operation steps.

[0013] To facilitate the operation, observation and control of the operator, the first automatic reset valve 51 and the third automatic reset valve 52 are integrated into one body, saving installation space and facilitating the operation, observation and control of the entire system.

[0014] In actual use, the oil tank 10 is divided into multiple oil compartments, such as Figure 2 、 Figure 3As shown, the test port Z of the high-level liquid control valve 20 with test function on the upper part of each oil tank is communicated with the working port d of the same second automatic reset valve 40 through a pipeline. The working port f of the third automatic reset valve 52 is communicated with the air inlet P of each high-level liquid control valve 20 with test function through a pipeline. The oil filling bottom valves 30 at the bottom of each oil tank are respectively communicated with the working port b of the corresponding first automatic reset valve 51. The air inlets a of each first automatic reset valve 51 are respectively communicated with the working port A of the corresponding high-level liquid control valve 20 with test function. One third automatic reset valve 52 controls the on-off of the air sources of multiple high-level liquid control valves 20 with test function, and at the same time tests the performance of multiple high-level liquid control valves 20 with test function, reducing the operation steps.

[0015] As Figure 2 shown, air inlets a are provided on each of the multiple first automatic reset valves 51 connected in parallel, and the air inlets a of each first automatic reset valve 51 are independent of each other. The air inlets a of each automatic reset valve 51 are respectively communicated with the working port A of the corresponding high-level liquid control valve 20 with test function through pipelines. This air circuit mode is called an independent air supply type multi-tank high-level test air circuit system, which is applicable to the test of high-level liquid control valves 20 with test function in a relatively large number ( Figure 2 only two are shown in the figure). As long as the handle 511 of the corresponding first automatic reset valve 51 is pulled, it can quickly determine which high-level liquid control valve 20 with test function has a malfunction in performance. At the same time, multiple first automatic reset valves 51 are integrated together, which is convenient for the operation of the operator. This independent air supply type multi-tank high-level test air circuit system also has an important advantage, that is, during normal oil filling operations, it can independently control the respective oil filling bottom valves 30, and the oil filling operations of each oil tank do not affect each other, and it can ensure that each oil tank can be filled with oil.

[0016] As Figure 3 shown, air inlets a are provided on each of the multiple first automatic reset valves 51 connected in series, and the air inlets a of each first automatic reset valve 51 are communicated with each other. The air inlet a of one of the first automatic reset valves 51 is communicated with the working port A of multiple high-level liquid control valves 20 with test function through a pipeline. This air circuit mode is called a shared air supply type multi-tank high-level test air circuit system, which is applicable to the test of high-level liquid control valves 20 with test function in a small number ( Figure 3 only two are shown in the figure). As long as one of the multiple high-level liquid control valves 20 with test function has a malfunction in performance, none of the multiple first automatic reset valves 51 connected in series can open the valve port.

[0017] For the shared gas supply type multi-bin high liquid level test gas circuit system, a dual pressure valve 60 is provided at the connection of the pipeline led out from the air inlet a of the first automatic reset valve 51 and the pipeline connecting the working port A of each high liquid level control valve 20 with test function. The air inlet g of the dual pressure valve 60 is respectively communicated with the working port A of the high liquid level control valve 20 with test function, and the working port h of the dual pressure valve 60 is communicated with the air inlet a of the first automatic reset valve 51. The characteristic of the dual pressure valve 60 is that only when there is gas at both air inlets g simultaneously, the valve port can be opened, there is gas at the air inlet a of the first automatic reset valve 51, and the handle 511 can be pulled; when there is no gas at both air inlets or there is gas at only one air inlet g, the valve is closed, there is no gas at the air inlet a of the first automatic reset valve 51, and the handle 511 cannot be pulled.

Claims

1. A high-level liquid test gas circuit system for a tanker refueling vehicle, comprising an oil tank (10). A high-level control valve (20) with a test function is provided at the top of the oil tank (10), and an oil filling bottom valve (30) is provided at the bottom. The air inlet P and the test port Z of the high-level control valve (20) with a test function are communicated with the gas source, and the working port A is connected to the air inlet of the oil filling bottom valve (30) through a pipeline. It is characterized in that: A first automatic reset valve (51) is provided on the pipeline between the high-level control valve (20) with a test function and the oil filling bottom valve (30). The air inlet a of the first automatic reset valve (51) is communicated with the working port A of the high-level control valve (20) with a test function, and the working port b of the first automatic reset valve (51) is communicated with the air inlet of the oil filling bottom valve (30). The first automatic reset valve (51) includes a handle (511). The inner end of the handle (511) protrudes into the valve cavity and is provided with a sealing plug for sealing the valve port. When there is no air in the air inlet a of the first automatic reset valve (51), the spring drives the sealing plug to seal the valve port; when there is air in the air inlet a of the first automatic reset valve (51), the handle (511) is pulled outwards to open the valve port.

2. The high-level liquid test gas circuit system for a tanker refueling vehicle according to claim 1, It is characterized in that: The system further includes a second automatic reset valve (40). The air inlet c of the second automatic reset valve (40) and the air inlet P of the high-level control valve (20) with a test function are both communicated with the same gas source through pipelines. The working port d of the second automatic reset valve (40) is communicated with the test port Z of the high-level control valve (20) with a test function. The first and second automatic reset valves (51, 40) have the same structure.

3. The high-level liquid test gas circuit system for a tanker refueling vehicle according to claim 2, It is characterized in that: A third automatic reset valve (52) is provided on the pipeline between the air inlet P of the high-level control valve (20) with a test function and the gas source. The air inlet e of the third automatic reset valve (52) is communicated with the gas source, and the working port f of the third automatic reset valve (52) is communicated with the air inlet P of the high-level control valve (20) with a test function and the air inlet c of the second automatic reset valve (40) through a pipeline.

4. The high-level liquid test gas circuit system for a tanker refueling vehicle according to claim 3, It is characterized in that: The first automatic reset valve (51) and the third automatic reset valve (52) are integrated into one body.

5. The high-level liquid test gas circuit system for a tanker refueling vehicle according to claim 3, It is characterized in that: The oil tank (10) is divided into multiple oil compartments. The test ports Z of the high-level control valves (20) with a test function at the upper parts of the respective oil compartments are communicated with the working port d of the same second automatic reset valve (40) through pipelines. The working port f of the third automatic reset valve (52) is communicated with the air inlets P of the respective high-level control valves (20) with a test function through pipelines. The oil filling bottom valves (30) at the bottoms of the respective oil compartments are respectively communicated with the working ports b of the corresponding first automatic reset valves (51), and the air inlets a of the respective first automatic reset valves (51) are respectively communicated with the working ports A of the corresponding high-level control valves (20) with a test function.

6. The high-level test gas circuit system of the tanker refueling vehicle according to claim 5, characterized in that: An air inlet a is provided on each of the multiple first automatic reset valves (51) connected in parallel, and the air inlets a of each first automatic reset valve (51) are independent of each other. The air inlets a of each first automatic reset valve (51) are respectively communicated with the working port A of the corresponding high-level control valve (20) with a test function through pipelines.

7. The high-level test gas circuit system of the tanker refueling vehicle according to claim 5, characterized in that: An air inlet a is provided on each of the multiple first automatic reset valves (51) connected in series, and the air inlets a of each first automatic reset valve (51) are communicated with each other. The air inlet a of one of the first automatic reset valves (51) is communicated with the working port A of multiple high-level control valves (20) with a test function through a pipeline.

8. The high-level test gas circuit system of the tanker refueling vehicle according to claim 7, characterized in that: A double-pressure valve (60) is provided at the connection of the pipeline led out from the air inlet a of the first automatic reset valve (51) and the pipeline connecting the working port A of each high-level control valve (20) with a test function. The air inlet g of the double-pressure valve (60) is respectively communicated with the working port A of the high-level control valve (20) with a test function, and the working port h of the double-pressure valve (60) is communicated with the air inlet a of the first automatic reset valve (51).

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