Calibrating device for fuel dispenser

Abstract

The utility model discloses a fuel oiling machine calibrating device, and belongs to the technical field of oiling machine calibrating equipment. The fuel oil temperature adjusting device overcomes the defects that in the prior art, a fuel oil temperature adjusting device in a fuel oil dispenser calibrating device is complex in structure and high in cost. The device mainly comprises an inner tank and an outer tank, the inner tank is arranged in the outer tank, the outer tank comprises an outer shell and an inner shell, an outer heat preservation cavity is formed between the outer shell and the inner shell, a heat preservation body is installed in the outer heat preservation cavity, an inner heat preservation cavity is formed between the inner shell and the inner tank, and a first oil injection pipe communicated with the inner heat preservation cavity is installed at the top of the outer tank. A first oil discharging pipe communicated with the inner heat preservation cavity is installed at the bottom of the outer tank, a first valve is installed on the first oil discharging pipe, a verification cavity for containing fuel oil is formed in the inner tank, a liquid level pipe and a second oil filling pipe which extend upwards out of the outer tank are installed at the top of the inner tank, and a second oil discharging pipe which extends downwards out of the outer tank is installed at the bottom of the inner tank. A second valve is mounted on the second oil discharging pipe.

Description

Technical Field

[0001] The utility model belongs to the technical field of fuel dispenser calibration equipment, and in particular relates to a fuel dispenser calibration device. Background Art

[0002] The purpose of regular inspection of gas pumps is to ensure the metering accuracy of gas pumps during operation, to prevent economic losses to consumers due to metering errors, and to safeguard the legitimate rights and interests of gas stations and consumers.

[0003] When a fuel dispenser is calibrated, it is often necessary to use a metering tank to calibrate the metering performance of the fuel dispenser. During the calibration, a certain amount of fuel is generally added to the metering tank through a fuel gun. When a fuel dispenser uses a metering tank for calibration, it has certain requirements for the temperature difference between the fuel and the ambient temperature. When the temperature difference between the temperature of the fuel in the fuel dispenser and the ambient temperature is large, a certain calibration error will easily occur, which will cause great trouble to the calibration work of the fuel dispenser. Patent Publication No. CN115127646A proposes a fuel dispenser metering calibration device, which mainly includes a calibration device body, and the calibration device body is connected to a temperature regulating device for regulating the internal temperature of the calibration device body. The temperature regulating device includes a heat exchanger, and a heating device and a refrigeration device are arranged inside the heat exchanger. When it is working, the first temperature sensor thereon can detect the temperature of the fuel at the oil inlet pipe (i.e., the muzzle oil temperature) in real time, and the second temperature sensor can detect the temperature of the fuel in the calibration device body in real time. The controller starts the temperature regulating device to adjust the temperature of the fuel in the calibration device body to the same as the muzzle oil temperature. The above patent adjusts the temperature of the fuel in the main body of the testing device through the temperature regulating device thereon, which has the problems of high cost and complex structure. Summary of the invention

[0004] The utility model aims to provide a fuel dispenser calibration device to overcome the defects of a fuel temperature regulating device in the prior art fuel dispenser calibration device, which has a complex structure and high cost.

[0005] The utility model is realized by adopting the following technical scheme: a fuel dispenser calibration device comprises an inner tank and an outer tank, the inner tank is in the outer tank, the outer tank comprises an outer shell and an inner shell, an outer insulation cavity is formed between the outer shell and the inner shell, an insulation body is installed in the outer insulation cavity, an inner insulation cavity is formed between the inner shell and the inner tank, a first oil filling pipe connected to the inner insulation cavity is installed on the top of the outer tank, a first oil unloading pipe connected to the inner insulation cavity is installed on the bottom of the outer tank, a first valve is installed on the first oil unloading pipe, a calibration cavity for accommodating fuel is provided in the inner tank, a liquid level pipe and a second oil filling pipe extending upward out of the outer tank are respectively installed on the top of the inner tank, a second oil unloading pipe extending downward out of the outer tank is installed on the bottom of the inner tank, a second valve is installed on the second oil unloading pipe, a first temperature sensor is installed on the upper end of the second oil filling pipe, and a second temperature sensor and a third temperature sensor are respectively installed in the inner insulation cavity and the calibration cavity.

[0006] Furthermore, a liquid level sensor is installed on the top of the liquid level tube, and the upper side of the liquid level tube is connected to the second oil filling pipe through a connecting pipe.

[0007] Furthermore, a funnel is installed on the upper side of the second oil filling pipe.

[0008] Furthermore, a transparent tube is installed on one side of the second oil filling tube, the lower end of the transparent tube is connected to the second oil filling tube, the upper end of the transparent tube is connected to the funnel, and a ruler is installed on one side of the transparent tube, and scales are provided on the ruler.

[0009] Furthermore, top covers are installed on the tops of the first oil filling pipe and the second oil filling pipe.

[0010] Furthermore, an annular support seat is installed on the outer tank, and at least three support legs are installed at intervals along the circumferential direction at the bottom of the support seat; the support seat is fixedly connected to the inner shell by welding.

[0011] Furthermore, a level is installed on the support seat, and a foot cup is installed at the bottom of the support leg.

[0012] Furthermore, a plurality of support blocks are installed at intervals between the inner shell and the outer shell and between the inner shell and the inner tank.

[0013] Furthermore, the thermal insulation body is made of aerogel felt.

[0014] Furthermore, the second oil filling pipe, the liquid level pipe and the second oil unloading pipe are all provided with a thermal insulation layer.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] 1. The utility model can insulate the fuel in the inner tank by setting an inner tank and an outer tank, so as to avoid large temperature changes of the fuel in the inner tank when the ambient temperature is high or low, so as to make the calibration of the fuel dispenser more accurate. In addition, the utility model has a simple structure, low cost and convenient maintenance. When using the utility model to measure and calibrate the fuel, the fuel is preferably injected into the inner insulation cavity through the first oil filling pipe. In order to ensure that the temperature of the fuel in the inner insulation cavity is close to the temperature of the fuel in the fuel dispenser, the fuel injected into the inner insulation cavity for the first time can be emptied after a certain period of injection, and the inner insulation cavity is filled with fuel again through the first oil filling pipe to make the temperature of the fuel in the inner insulation cavity close to the temperature of the fuel in the fuel dispenser. The second oil filling pipe injects the fuel into the calibration cavity of the inner tank. Since the inner tank is in contact with the inner insulation cavity, the temperature of the fuel in the inner insulation cavity is close to the temperature of the fuel in the fuel dispenser, thereby avoiding the influence of higher or lower ambient temperature on the fuel in the calibration cavity.

[0017] 2. The utility model can avoid heat exchange between the inner insulation cavity and the external environment as much as possible by installing an insulation body in the outer insulation cavity, so that the fuel in the inner insulation cavity can be kept as close as possible to the fuel temperature in the fuel dispenser. The utility model provides an insulation layer on the second oil filling pipe, the liquid level pipe and the second oil unloading pipe, so that the second oil filling pipe, the liquid level pipe and the second oil unloading pipe are all insulation pipes, which can avoid heat exchange between the fuel in the inner tank and the external environment as much as possible. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the utility model;

[0019] Figure 2 It is a partial cross-sectional view of the utility model.

[0020] In the figure: 1. inner tank; 2. outer tank; 3. outer shell; 4. inner shell; 5. outer insulation chamber; 6. insulation body; 7. inner insulation chamber; 8. first oil filling pipe; 9. first oil unloading pipe; 10. first valve; 11. calibration chamber; 12. liquid level pipe; 13. second oil filling pipe; 14. second oil unloading pipe; 15. second valve; 16. first temperature sensor; 17. second temperature sensor; 18. third temperature sensor; 19. connecting pipe; 20. funnel; 21. transparent tube; 22. ruler; 23. top cover; 24. support seat; 25. support leg; 26. spirit level; 27. foot cup; 28. support block; 29. ​​connecting plate. DETAILED DESCRIPTION

[0021] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0022] A fuel dispenser calibration device comprises an inner tank 1 and an outer tank 2, wherein the inner tank 1 is in the outer tank 2, and the outer tank 2 comprises an outer shell 3 and an inner shell 4 to form a double-layer structure.

[0023] An outer heat preservation cavity 5 is formed between the outer shell 3 and the inner shell 4, and a heat preservation body 6 is installed in the outer heat preservation cavity 5. The heat preservation body 6 is made of aerogel felt. By installing the heat preservation body 6 in the outer heat preservation cavity 5, the utility model can avoid the heat exchange between the inner heat preservation cavity 7 and the external environment as much as possible, so that the fuel in the inner heat preservation cavity 7 can be kept as close to the fuel temperature in the fuel dispenser as possible. The outer shell 3 plays the role of fixing and protecting the heat preservation body 6 in the outer heat preservation cavity 5.

[0024] An inner heat preservation chamber 7 is formed between the inner shell 4 and the inner tank 1. A first oil filling pipe 8 connected to the inner heat preservation chamber 7 is installed on the top of the outer tank 2. A first oil discharge pipe 9 connected to the inner heat preservation chamber 7 is installed at the bottom of the outer tank 2. A first valve 10 is installed on the first oil discharge pipe 9. A second temperature sensor 17 is installed in the inner heat preservation chamber 7. The second temperature sensor 17 can detect the temperature of the fuel in the inner heat preservation chamber 7, and then determine the temperature difference between the fuel in the inner heat preservation chamber 7 and the fuel in the fuel dispenser. The upper and lower sides between the inner shell 4 and the inner tank 1 are connected by an annular connecting plate 29, so that the inner heat preservation chamber 7 forms a closed chamber and is only connected to the outside through the first oil filling pipe 8 and the first oil discharge pipe 9. When the utility model is in use, the oil filling gun injects fuel into the inner insulation chamber 7 through the first oil filling pipe 8. To ensure that the temperature of the fuel in the inner insulation chamber 7 is close to the temperature of the fuel in the fuel dispenser, the fuel first injected into the inner insulation chamber 7 can be emptied after a certain period of time, and then the inner insulation chamber 7 is filled with fuel again through the first oil filling pipe 8, so that the temperature of the fuel in the inner insulation chamber 7 is close to the temperature of the fuel dispenser.

[0025] The inner tank 1 has a test chamber 11 for containing fuel. The top of the inner tank 1 is respectively installed with a liquid level pipe 12 extending upward from the outer tank 2 and a second oil filling pipe 13. The bottom of the inner tank 1 is installed with a second oil discharge pipe 14 extending downward from the outer tank 2. A second valve 15 is installed on the second oil discharge pipe 14. A first temperature sensor 16 is installed on the upper end of the second oil filling pipe 13. A third temperature sensor 18 is installed in the test chamber 11. The test chamber 11 is used to contain fuel. During the test, the fuel gun injects the fuel into the test chamber 11 through the second fuel filling pipe 13. When the test is completed, the second valve 15 on the second oil discharge pipe 14 is opened and the fuel in the test chamber 11 is emptied. The first temperature sensor 16 on the upper end of the second fuel filling pipe 13 can detect the temperature of the fuel just flowing out of the fuel gun, which is close to the temperature of the fuel in the fuel dispenser. The third temperature sensor 18 can detect the temperature of the fuel in the test chamber 11. The liquid level pipe 12, the second oil filling pipe 13 and the second oil discharge pipe 14 are part of the inner tank 1. During the inspection, the fuel in the inspection cavity 11 will enter the liquid level pipe 12, and the liquid level of the fuel in the inner tank 1 is detected by the liquid level pipe 12, thereby obtaining the fuel capacity in the inner tank 1. The sensing end of the third temperature sensor 18 of the utility model can be inserted into the lower side of the liquid level pipe 12 or inserted into the inspection cavity 11 from the liquid level pipe 12. The outer shell 3 is fixedly connected to the liquid level pipe 12 and the second oil discharge pipe 14 by welding, and the inner shell 4 is fixedly connected to the liquid level pipe 12 and the second oil discharge pipe 14 by welding.

[0026] A liquid level sensor is installed on the top of the liquid level tube 12, and the upper side of the liquid level tube 12 is connected to the second oil filling pipe 13 through a connecting pipe 19. The utility model can accurately detect the height of the liquid level in the liquid level tube 12 through the liquid level sensor, and the liquid level sensor can be an ultrasonic liquid level sensor.

[0027] A funnel 20 is installed on the upper side of the second oil filling pipe 13. The utility model can conveniently add fuel to the test chamber 11 through the second oil filling pipe 13 by installing the funnel 20.

[0028] A transparent tube 21 is installed on one side of the second oil filling pipe 13, the lower end of the transparent tube 21 is connected to the second oil filling pipe 13, the upper end of the transparent tube 21 is connected to the funnel 20, and a ruler 22 is installed on one side of the transparent tube 21, and a scale is provided on the ruler 22. The utility model can play a role in assisting the detection of the liquid level of the fuel in the inner tank 1 by setting the transparent tube 21. During the detection, the fuel in the second oil filling pipe 13 enters the oil filling pipe from the bottom of the transparent tube 21 and rises to a certain height. The staff obtains the liquid level of the fuel in the inner tank 1 by observing the scale of the ruler 22 aligned with the liquid level in the transparent tube 21.

[0029] The top of the first oil filling pipe 8 and the second oil filling pipe 13 are both installed with a top cover 23. The utility model can well prevent debris from entering the inner tank 1 and the inner insulation chamber 7 by installing the top cover 23 on the top of the first oil filling pipe 8 and the second oil filling pipe 13.

[0030] The outer tank 2 is provided with an annular support seat 24, and at least three support legs 25 are installed at intervals along the circumferential direction at the bottom of the support seat 24; the support seat 24 is fixedly connected to the inner shell 4 by welding. The utility model provides the support seat 24, which can play a good supporting role for the outer tank 2 and the inner tank 1, and the outer shell 3 can be divided into multiple parts, and the outer shell 3 can also be fixedly connected to the support seat 24 by welding.

[0031] A level 26 is installed on the support seat 24, and a foot cup 27 is installed at the bottom of the support leg 25. The utility model can be horizontally adjusted during calibration by installing the level 26, and the adjustment can be achieved by adjusting the foot cup 27.

[0032] A plurality of support blocks 28 are installed at intervals between the inner shell 4 and the outer shell 3 and between the inner shell 4 and the inner tank 1. By providing the support blocks 28, the utility model can make the inner tank 1 and the inner shell 4 and the inner shell 4 and the outer shell 3 more firmly fixed.

[0033] The second oil filling pipe 13, the liquid level pipe 12 and the second oil unloading pipe 14 are all provided with a thermal insulation layer. The utility model provides a thermal insulation layer on the second oil filling pipe 13, the liquid level pipe 12 and the second oil unloading pipe 14, so that the second oil filling pipe 13, the liquid level pipe 12 and the second oil unloading pipe 14 are all thermal insulation pipes, which can minimize the heat exchange between the fuel in the inner tank 1 and the external environment.

Claims

1. A fuel dispenser calibration device, characterized in that: The invention comprises an inner tank (1) and an outer tank (2), wherein the inner tank (1) is in the outer tank (2), and the outer tank (2) comprises an outer shell (3) and an inner shell (4), an outer heat-insulating cavity (5) is formed between the outer shell (3) and the inner shell (4), a heat-insulating body (6) is installed in the outer heat-insulating cavity (5), an inner heat-insulating cavity (7) is formed between the inner shell (4) and the inner tank (1), a first oil filling pipe (8) connected to the inner heat-insulating cavity (7) is installed at the top of the outer tank (2), a first oil discharge pipe (9) connected to the inner heat-insulating cavity (7) is installed at the bottom of the outer tank (2), and a first valve (10) is installed on the first oil discharge pipe (9) The inner tank (1) has a test chamber (11) for accommodating fuel oil. A liquid level pipe (12) and a second fuel injection pipe (13) extending upward from the outer tank (2) are respectively installed on the top of the inner tank (1). A second fuel discharge pipe (14) extending downward from the outer tank (2) is installed on the bottom of the inner tank (1). A second valve (15) is installed on the second fuel discharge pipe (14). A first temperature sensor (16) is installed on the upper end of the second fuel injection pipe (13). A second temperature sensor (17) and a third temperature sensor (18) are respectively installed in the inner heat preservation chamber (7) and the test chamber (11).

2. A fuel dispenser calibration device according to claim 1, characterized in that: A liquid level sensor is installed on the top of the liquid level tube (12), and the upper side of the liquid level tube (12) is connected to the second oil injection tube (13) via a connecting tube (19).

3. A fuel dispenser calibration device according to claim 1, characterized in that: A funnel (20) is installed on the upper side of the second oil injection pipe (13).

4. A fuel dispenser calibration device according to claim 3, characterized in that: A transparent tube (21) is installed on one side of the second oil injection tube (13), the lower end of the transparent tube (21) is connected to the second oil injection tube (13), the upper end of the transparent tube (21) is connected to the funnel (20), and a scale (22) is installed on one side of the transparent tube (21), with scale marks on the scale (22).

5. A fuel dispenser calibration device according to claim 1, characterized in that: A top cover (23) is installed on the top of each of the first oil injection pipe (8) and the second oil injection pipe (13).

6. A fuel dispenser calibration device according to claim 5, characterized in that: An annular support seat (24) is mounted on the outer tank (2), and at least three support legs (25) are mounted at intervals along the circumferential direction on the bottom of the support seat (24); the support seat (24) is fixedly connected to the inner shell (4) by welding.

7. A fuel dispenser calibration device according to claim 6, characterized in that: A level gauge (26) is mounted on the support base (24), and a foot cup (27) is mounted on the bottom of the support leg (25).

8. A fuel dispenser calibration device according to claim 1, characterized in that: A plurality of support blocks (28) are respectively installed at intervals between the inner shell (4) and the outer shell (3) and between the inner shell (4) and the inner tank (1).

9. A fuel dispenser calibration device according to claim 1, characterized in that: The heat-insulating body (6) is made of aerogel felt.

10. A fuel dispenser calibration device according to claim 1, characterized in that: The second oil filling pipe (13), the liquid level pipe (12) and the second oil unloading pipe (14) are all provided with a thermal insulation layer.

Images