Calibrating device for fuel dispenser

Abstract

The utility model relates to the technical field of oil product verification, in particular to a fuel dispenser verification device which comprises a supporting plate, a standard metal measuring vessel and a plurality of fixing frames, the fixing frames are fixedly installed at the lower end of the supporting plate, the standard metal measuring vessel is fixedly installed above the supporting plate, and the standard metal measuring vessel is fixedly installed above the supporting plate. And a fuel oil filling and exhausting structure is arranged at the top end of the standard metal measuring vessel. According to the calibrating device for the fuel dispenser, when fuel needs to be poured into the standard metal measuring vessel along the fuel filling pipe, the twisting wheel is rotated anticlockwise, then the ball valve rotates, and the two vent holes are vertically formed, so that the internal space of the standard metal measuring vessel is communicated with the outside through the inside of the bent pipe, and the pressure on the inner side of the standard metal measuring vessel is balanced; when fuel oil is filled into the filling pipe, internal air cannot be extruded to be discharged along the upper vent hole, and the air cannot flow out along the filling pipe reversely, so that the fuel oil can be filled more smoothly without hindrance, and the working efficiency of the calibrating device for the fuel oil filling machine is improved.

Description

Technical Field

[0001] This utility model relates to the field of oil testing technology, specifically a fuel dispenser testing device. Background Technology

[0002] Traditional fuel dispensers are mainly tested using volumetric, flow rate, and mass methods. The essence of mass method testing fuel dispensers is to test the flow meter inside the dispenser. This flow meter measures the volume of fuel at the oil temperature output by the flow measurement transducer inside the dispenser. Currently, the mass method measures the volume of fuel at the oil temperature inside the meter.

[0003] For example, the authorization announcement number "CN221527782U" is titled "A Fuel Dispenser Calibration Device." This device combines information collected by a density sensor, a pressure gauge, a first temperature sensor, and a second temperature sensor to measure the volume of fuel dispensed, thus calibrating the dispenser. However, existing fuel dispenser calibration devices require filling a standard metal measuring vessel with fuel. While the fuel is guided by an extended guide plate, air may remain inside the dispenser before filling. This causes the liquid fuel to fill the standard metal measuring vessel, reducing its internal space and forcing the existing air upwards. This upward-expelled air then interferes with the fuel being dispensed, obstructing the process from bottom to top. Therefore, each fuel dispensing operation takes a relatively long time, which is detrimental to the efficiency of the fuel dispenser calibration device.

[0004] Meanwhile, existing fuel dispenser calibration devices require liquid observation of the fuel poured into a standard metal measuring vessel during calibration to understand the fuel level height inside in real time. However, liquid level observation can only be achieved by staff looking at the height of the liquid level and scale line through a transparent window, which cannot accurately determine the fuel level height and affects the effectiveness of the fuel dispenser calibration device. Summary of the Invention

[0005] The purpose of this utility model is to solve the problems of poor working efficiency and mediocre performance of existing fuel dispenser calibration devices, and to propose a fuel dispenser calibration device.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A fuel dispenser calibration device is designed, comprising a support plate, a standard metal measuring instrument, and a fixing frame. Multiple fixing frames are fixedly installed at the lower end of the support plate, and the standard metal measuring instrument is fixedly installed above the support plate. The top of the standard metal measuring instrument is provided with a fuel filling and venting structure, and the other side of the top of the standard metal measuring instrument is provided with a liquid level precision positioning display structure.

[0008] Preferably, the fuel filling and exhaust structure includes a sealing head and a curved pipe. The curved pipe is fixedly connected to the top of the outer wall of a standard metal measuring instrument. The sealing head is fixedly sleeved on the lower end of the outer wall of the curved pipe. A circular cavity is fixedly connected in the middle of the curved pipe. A ball valve is rotatably connected to the inner side of the circular cavity. A torsion wheel is rotatably connected to the outer wall of the curved pipe. The inner side of the torsion wheel is fixedly connected to one side of the ball valve. A vent hole is fixedly opened inside the ball valve.

[0009] Preferably, an oil filling tube is fixedly connected to one side of the top of the standard metal measuring instrument, and a temperature sensor is fixedly connected to the lower inner end of the oil filling tube.

[0010] Preferably, the liquid level precise positioning display structure includes a guide tube and limiting blocks. The guide tube is fixedly connected to the other side of the top of the standard metal volumetric instrument. A vertical rod is slidably connected to the inner side of the guide tube. A float is fixedly installed at the lower end of the vertical rod. A horizontal frame is fixedly connected to the top of the vertical rod. A guide bar is fixedly connected to the other side below the horizontal frame. Multiple limiting blocks are fixedly connected to the outer wall of the standard metal volumetric instrument. The side walls of the multiple limiting blocks are slidably connected to the guide bar. A scale line is fixedly installed on the outer wall of the standard metal volumetric instrument. The lower end of the guide bar is slidably disposed relative to the outer side of the scale line.

[0011] Preferably, a liquid tapping valve is fixedly connected to the lower end of the standard metal measuring instrument, and a safety valve pressure gauge is fixedly connected to one side of the lower end of the standard metal measuring instrument.

[0012] Preferably, a liquid level display window is fixedly installed on the outer wall of the standard metal measuring vessel.

[0013] The present invention provides a fuel dispenser calibration device with the following advantages: When fuel needs to be poured into the standard metal measuring vessel along the filling pipe, the torsion wheel is first rotated counterclockwise. At this time, the ball valve rotates, and the two vent holes are set vertically. In this way, the inside of the curved pipe connects the internal space of the standard metal measuring vessel with the outside. The pressure inside the standard metal measuring vessel is balanced, and when fuel is poured into the filling pipe, the internal air will not be squeezed out through the upper vent hole, and the air will not rush out along the filling pipe in the opposite direction. This allows the fuel to be poured in more smoothly and without obstruction, improving the working efficiency of the fuel dispenser calibration device.

[0014] The guide tube is fixed to the top of the standard metal measuring vessel. The vertical rod can slide up and down along the guide tube. The float is made of hollow aluminum spheres with high buoyancy. When fuel is poured into the standard metal measuring vessel, the liquid level will rise continuously. The fuel will use buoyancy to push the float upward. The vertical rod, horizontal frame, and indicator bar are all made of lightweight hollow aluminum tubes. The rising vertical rod can then push the indicator bar to rise above the outer wall of the standard metal measuring vessel. The bottom of the indicator bar is at the same height as the float in the liquid level. The operator can directly observe the position of the bottom of the indicator bar corresponding to the scale line to clearly and conveniently determine the specific height of the liquid level inside the standard metal measuring vessel. With its intuitive and clear liquid level observation structure, the data is clear and easy to use, improving the effectiveness of the fuel dispenser calibration device. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0016] Figure 2 for Figure 1 A frontal sectional view;

[0017] Figure 3 for Figure 1 Top view diagram;

[0018] Figure 4 for Figure 2 Enlarged sectional view of section A in the middle;

[0019] Figure 5 for Figure 2 Enlarged sectional view of section B in the middle;

[0020] Figure 6 for Figure 2 Enlarged sectional view of section C.

[0021] In the diagram: 1. Support plate, 2. Standard metal measuring instrument, 3. Fixture, 4. Drain valve, 5. Safety valve pressure gauge, 6. Fuel filling and exhaust structure, 61. Sealing head, 62. Bend pipe, 63. Torsion wheel, 64. Circular cavity, 65. Ball valve, 66. Vent hole, 7. Precise liquid level positioning and display structure, 71. Guide tube, 72. Vertical rod, 73. Horizontal frame, 74. Pointing bar, 75. Limiting block, 76. Float, 77. Scale line, 8. Liquid level display window, 91. Filling pipe, 92. Temperature sensor. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings:

[0023] Please see Figure 1-6In this embodiment, a fuel dispenser calibration device includes a support plate 1, a standard metal measuring vessel 2, and a fixing frame 3. Multiple fixing frames 3 are fixedly installed at the lower end of the support plate 1. The fixing frame 3 has four supports that can horizontally fix the upper support plate 1 to the ground. The standard metal measuring vessel 2 is fixedly installed above the support plate 1. The standard metal measuring vessel 2 is a stainless steel metal can with equal upper and lower cross-sectional areas. The top of the standard metal measuring vessel 2 is provided with a fuel filling and venting structure 6. The other side of the top of the standard metal measuring vessel 2 is provided with a liquid level precision positioning display structure 7.

[0024] The fuel filling exhaust structure 6 includes a sealing head 61 and a bent pipe 62. The bent pipe 62 is fixedly connected to the top of the outer wall of the standard metal measuring vessel 2. The sealing head 61 is made of rubber material and is wrapped around the lower end of the bent pipe 62 at the connection point with the standard metal measuring vessel 2, which can reduce air and oil leakage. The sealing head 61 is fixedly sleeved on the lower end of the outer wall of the bent pipe 62. The bent pipe 62 can be a metal stainless steel pipe with the bent head facing downward. A circular cavity 64 is fixedly connected in the middle of the bent pipe 62.

[0025] A circular ball valve 65 is provided on the inner side of the circular cavity 64, which fits snugly against the inside. The ball valve 65 is rotatably connected to the inner side of the circular cavity 64. A torsion wheel 63 is rotatably connected to the outer wall of the curved tube 62. When it is necessary to pour fuel into the standard metal measuring vessel 2 along the filling tube 91, the torsion wheel 63 is rotated counterclockwise first. This causes the ball valve 65 to rotate. Two vent holes 66 are set vertically. In this way, the inside of the curved tube 62 connects the internal space of the standard metal measuring vessel 2 with the outside. The pressure inside the standard metal measuring vessel 2 is balanced. When fuel is poured into the filling tube 91, it will not squeeze the internal air out along the upper vent hole 66. The air will not rush out along the filling tube 91 in the opposite direction.

[0026] This allows for smoother and unobstructed fuel filling. The inner side of the torsion wheel 63 is fixedly connected to one side of the ball valve 65. Finally, after the fuel is filled, the ball valve 65 can be rotated clockwise to close the vent hole 66 laterally. This reduces the amount of external dust and impurities entering the inside of the standard metal measuring vessel 2 along the curved tube 62. The ball valve 65 has a fixed vent hole 66 inside.

[0027] The sealing head 61 is made of rubber material and is wrapped around the lower end of the bent tube 62 at the connection with the standard metal measuring vessel 2. This can reduce air and oil leakage. The bent tube 62 can be a stainless steel pipe with the bent head facing downwards. When it is necessary to pour fuel into the standard metal measuring vessel 2 along the filling pipe 91, first rotate the torsion wheel 63 counterclockwise. At this time, the ball valve 65 rotates and the two vent holes 66 are set vertically.

[0028] In this way, the inside of the curved tube 62 connects the internal space of the standard metal measuring vessel 2 with the outside. The pressure inside the standard metal measuring vessel 2 is balanced, so when fuel is poured into the filling tube 91, the internal air will not be squeezed out through the upper vent 66, and the air will not rush out along the filling tube 91 in the opposite direction. This allows the fuel to be poured in more smoothly and without obstruction, improving the working efficiency of the fuel dispenser calibration device.

[0029] A fuel filling pipe 91 is fixedly connected to one side of the top of the standard metal measuring vessel 2. A temperature sensor 92 is fixedly connected to the lower inner side of the fuel filling pipe 91. The temperature sensor 92 adopts an existing thermocouple sensor. There are two temperature sensors 92. One can measure the temperature of the fuel filling pipe 91, and the other temperature sensor 92 can measure the internal temperature of the standard metal measuring vessel 2.

[0030] The liquid level precise positioning display structure 7 includes a guide tube 71 and a limiting block 75. The guide tube 71 is fixedly connected to the other side of the top of the standard metal volumetric instrument 2. The guide tube 71 is fixed to the top of the standard metal volumetric instrument 2. The vertical rod 72 can slide up and down along the guide tube 71. The vertical rod 72 is slidably connected to the inner side of the guide tube 71. A float 76 is fixedly installed at the lower end of the vertical rod 72. The float 76 is made of hollow aluminum metal ball with large buoyancy inside.

[0031] As fuel is poured into the standard metal measuring vessel 2, the liquid level will continuously rise. The fuel will use buoyancy to push the float 76 upward. The top of the vertical rod 72 is fixedly connected to the horizontal frame 73, and the other side below the horizontal frame 73 is fixedly connected to the indicator bar 74. The vertical rod 72, the horizontal frame 73, and the indicator bar 74 are all made of lightweight hollow thin aluminum tubes. The rising vertical rod 72 can then push the indicator bar 74 to rise higher on the outer wall of the standard metal measuring vessel 2. The lowest point of the indicator bar 74 is at the same height as the float 76 in the liquid level.

[0032] The operator can directly observe the reading at the position corresponding to the bottom of the indicator bar 74 and the scale line 77 to clearly and conveniently determine the specific height of the liquid inside the standard metal volumetric vessel 2. Multiple limit blocks 75 are fixedly connected to the outer wall of the standard metal volumetric vessel 2. The side walls of the multiple limit blocks 75 are slidably connected to the indicator bar 74. The scale line 77 is fixedly installed on the outer wall of the standard metal volumetric vessel 2. The lower end of the indicator bar 74 is slidably set relative to the outer side of the scale line 77.

[0033] The guide tube 71 is fixed to the top of the standard metal measuring vessel 2. The vertical rod 72 can slide up and down along the guide tube 71. The float 76 is made of hollow aluminum spheres with large buoyancy. When fuel is poured into the standard metal measuring vessel 2, the liquid level will rise continuously. The oil will use buoyancy to push the float 76 up. The vertical rod 72, the horizontal frame 73 and the guide bar 74 are all made of lightweight hollow aluminum tubes.

[0034] The rising vertical rod 72 can then push the indicator bar 74 to rise higher on the outer wall of the standard metal volumetric vessel 2. The lowest point of the indicator bar 74 is at the same height as the float 76 in the liquid level. The operator can directly observe the position of the lowest point of the indicator bar 74 corresponding to the scale line 77 to clearly and conveniently determine the specific height of the liquid level inside the standard metal volumetric vessel 2. The intuitive and clear liquid level observation structure provides clear data and is easy to use, improving the effectiveness of the fuel dispenser calibration device.

[0035] A drain valve 4 is fixedly connected to the lower end of the standard metal measuring vessel 2. After the refueling and calibration operation is completed, the drain valve 4 can be opened to discharge the fuel stored inside the standard metal measuring vessel 2. A safety valve pressure gauge 5 is fixedly connected to one side of the lower end of the standard metal measuring vessel 2. A liquid level display window 8 is fixedly installed on the outer wall of the standard metal measuring vessel 2. The liquid level display window 8 is made of tempered transparent glass with high sealing performance. The liquid level display window 8 allows the operator to view the liquid level in real time.

[0036] Working principle:

[0037] The fuel dispenser calibration device is used to measure the volume of fuel at the oil temperature output by the flow measurement converter inside the fuel dispenser.

[0038] During operation, the fuel dispenser is started first. Based on the required amount of fuel for the vehicle, fuel is injected into the filling pipe 91 using a fuel nozzle. During the fuel injection process, the temperature sensor 92 is used to obtain the oil temperature tJ at the nozzle outlet. After the fuel injection is stopped, the temperature sensor 92 can measure the oil temperature tB inside the standard metal measuring vessel 1. After the oil foam and bubbles in the standard metal measuring vessel 2 disappear, the oil pressure P at the bottom of the standard metal measuring vessel 2 is obtained through the safety valve pressure gauge 5, and the oil density ρ is obtained through the density sensor. Furthermore, based on the calibrated cross-sectional area S of the standard metal measuring vessel 2, the volume V of the fuel is calculated. Finally, the precise volume is measured according to the formula V=PS / ρg[1 + βy(t,-tB)+βB(tB-20)], where g represents the local gravitational acceleration, βY represents the volume expansion coefficient of the test medium, and βB represents the volume expansion coefficient of the material of the standard metal measuring vessel 2.

[0039] Fuel dispenser calibration device with fuel filling resistance reduction structure:

[0040] The sealing head 61 is made of rubber material and is wrapped around the lower end of the bent tube 62 at the connection with the standard metal measuring vessel 2. This reduces air and oil leakage. The bent tube 62 can be a stainless steel pipe with the bent head facing downwards. When it is necessary to pour fuel into the standard metal measuring vessel 2 along the filling tube 91, first rotate the torsion wheel 63 counterclockwise. At this time, the ball valve 65 rotates and the two vent holes 66 are set vertically. In this way, the inside of the bent tube 62 connects the internal space of the standard metal measuring vessel 2 with the outside. The pressure inside the standard metal measuring vessel 2 is balanced. When the fuel is poured into the filling tube 91, it will not squeeze the internal air out along the upper vent hole 66, and the air will not rush out along the filling tube 91 in the opposite direction.

[0041] The fuel dispenser calibration device features a clear liquid level display structure.

[0042] The guide tube 71 is fixed to the top of the standard metal measuring vessel 2. The vertical rod 72 can slide up and down along the guide tube 71. The float 76 is made of hollow aluminum spheres with high buoyancy. When fuel is poured into the standard metal measuring vessel 2, the liquid level will rise continuously. The fuel will use buoyancy to push the float 76 upward. The vertical rod 72, the horizontal bracket 73, and the indicator bar 74 are all made of lightweight hollow aluminum tubes. The rising vertical rod 72 can then push the indicator bar 74 to rise higher on the outer wall of the standard metal measuring vessel 2. The bottom of the indicator bar 74 is at the same height as the float 76 in the liquid level. The operator can directly read the position corresponding to the bottom of the indicator bar 74 and the scale line 77 to clearly and conveniently determine the specific height of the liquid level inside the standard metal measuring vessel 2.

[0043] The safety valve pressure gauge 5 belongs to the prior art disclosed in the prior art document authorized by the prior art document "CN221527782U" entitled "A Fuel Dispenser Calibration Device". The safety valve pressure gauge 5 consists of a pressure gauge and a safety valve. The pressure gauge is connected to the standard metal measuring vessel 2. The function of the safety valve is to stabilize the oil before it enters the pressure gauge for measurement. The measuring point of the pressure gauge is at the same height as the bottom of the standard metal measuring vessel 2. Based on the principle of communicating vessels, this ensures the accuracy of pressure measurement. Compared with the mass method, the pressure method has more advantages when considering the impact of transportation and vibration on the equipment. The pressure gauge does not have the problem of loading direction and is convenient and quick to install.

[0044] Although the present invention has been illustrated and described with reference to preferred embodiments, those skilled in the art should understand that various changes in form and detail are possible within the scope of the claims.

Claims

1. A fuel dispenser calibration device, comprising a support plate (1), a standard metal measuring instrument (2), and a fixing frame (3), wherein a plurality of said fixing frames (3) are fixedly installed at the lower end of the support plate (1), and said standard metal measuring instrument (2) is fixedly installed at the upper end of the support plate (1), characterized in that: The standard metal measuring vessel (2) has a fuel filling and venting structure (6) at its top and a liquid level precision positioning display structure (7) on the other side of its top. The fuel filling and venting structure (6) includes a sealing head (61) and a curved tube (62). The curved tube (62) is fixedly connected to the top of the outer wall of the standard metal measuring vessel (2). The sealing head (61) is fixedly sleeved on the lower end of the outer wall of the curved tube (62). A circular cavity (64) is fixedly connected in the middle of the curved tube (62). A ball valve (65) is rotatably connected to the inner side of the circular cavity (64). A torsion wheel (63) is rotatably connected to the outer wall of the curved tube (62). The inner side of the torsion wheel (63) is fixedly connected to one side of the ball valve (65). A vent hole (66) is fixedly opened inside the ball valve (65). The liquid level... The precise positioning display structure (7) includes a guide tube (71) and a limiting block (75). The guide tube (71) is fixedly connected to the other side of the top of the standard metal measuring instrument (2). A vertical rod (72) is slidably connected to the inner side of the guide tube (71). A float (76) is fixedly installed at the lower end of the vertical rod (72). A horizontal frame (73) is fixedly connected to the top of the vertical rod (72). A guide bar (74) is fixedly connected to the other side below the horizontal frame (73). Multiple limiting blocks (75) are fixedly connected to the outer wall of the standard metal measuring instrument (2). The side walls of multiple limiting blocks (75) are slidably connected to the guide bar (74). A scale line (77) is fixedly installed on the outer wall of the standard metal measuring instrument (2). The lower end of the guide bar (74) is slidably set relative to the outer side of the scale line (77).

2. The fuel dispenser calibration device according to claim 1, characterized in that: The lower end of the standard metal measuring instrument (2) is fixedly connected to a drain valve (4), and a safety valve pressure gauge (5) is fixedly connected to one side of the lower end of the standard metal measuring instrument (2).

3. The fuel dispenser calibration device according to claim 1, characterized in that: An oil filling tube (91) is fixedly connected to one side of the top of the standard metal measuring instrument (2), and a temperature sensor (92) is fixedly connected to the lower inner end of the oil filling tube (91).

4. The fuel dispensing pump calibration device of claim 1, wherein: The standard metal measuring instrument (2) has a liquid level display window (8) fixedly installed on its outer wall.

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