A measurement and calibration device that eliminates the influence of temperature difference on fuel dispenser calibration error

Abstract

The present invention discloses a metrological calibration device for eliminating the influence of temperature difference on the calibration error of a fuel dispenser, belonging to the field of metrological calibration technology, comprising a base, a measuring cylinder being fixedly connected to the left side of the upper end face of the base, the lower end of the measuring cylinder being in a conical structure and extending to the bottom of the base, an observation port being provided at the center position of the front side face of the base, a standard scale line being engraved on the right side of the observation port, a fueling pipe being connected at the center position of the left side face of the measuring cylinder, which can be lowered along the inner wall of the measuring cylinder during the rotation of a rotating ring, and at the same time, a cleaning agent is transported to the inside of the rotating ring through a first liquid tank, and during the descending process of the rotating ring, the cleaning agent continuously flows through a leakage hole onto a rag, and the inner wall of the measuring cylinder is scrubbed by the rag, and when the rotating ring is raised back up, clean water is transported to the inside of the rotating ring through a second liquid tank, and during the rising process of the rotating ring, the clean water flows through the leakage hole onto the rag, and the residual cleaning agent is cleaned by the clean water to improve the cleaning effect.

Description

Technical Field

[0001] The present invention relates to the technical field of metrology and calibration, and more particularly to a metrology and calibration device for eliminating the influence of temperature difference on calibration errors of a fuel dispenser. Background Art

[0002] With the rapid development of road traffic in my country, gas stations are spread all over the roads. Therefore, the inspection of gas pumps has become a heavy task for the quality and technical supervision departments. In order to ensure the accurate measurement of gas pumps at gas stations, each gas pump needs to be regularly inspected by the national metrology and verification agency to determine whether the gas pump is qualified or needs adjustment and repair.

[0003] The existing fuel metering and verification method is to add the oil in the fuel dispenser to the metering and verification device for testing. Because the metering and verification device needs to test different types of fuel, if there is any residual fuel in the metering and verification device, it will mix with the next oil extracted, thereby affecting the accuracy of the test results. The mixed fuel will also affect subsequent use.

[0004] The existing patent (Announcement No.: CN212721679U) discloses a metering and calibration device for a fuel dispenser, comprising a base plate with four bolts mounted therein. Support blocks are provided at the lower ends of the bolts, and the support blocks and bolts are rotatably connected. A housing is mounted on the upper end of the base plate, a scale tube is provided at the rear end of the housing, and the scale tube is connected to the housing. A support plate is provided at the rear end of the housing, and a level is mounted on the support plate. Threaded rods are vertically mounted at the bottom of the housing, bearing seats are mounted at the upper ends of the rods, a rotating plate is mounted at the upper end of the bearing seats, and a motor is mounted at the upper end of the housing. The present invention's first and second scrapers clean the inner walls and bottom of the housing, scraping off any remaining oil. The inner walls of the housing are then cleaned with a layer of cleaning cloth to prevent different oils from mixing and affecting the subsequent use of the extracted oil. This is convenient, fast, and reduces costs.

[0005] Although the metering and calibration device of the fuel dispenser can clean the fuel on the inner wall of the tank, some fuel will still remain on the inner wall of the tank by simply scraping the inner wall of the tank, and components such as the threaded rods inside the tank will affect the volume of fuel added to the tank, thereby affecting the calibration results. Summary of the Invention

[0006] 1. Technical problems to be solved

[0007] In response to the problems existing in the prior art, the purpose of the present invention is to provide a metrological calibration device that eliminates the influence of temperature difference on the calibration error of the fuel dispenser. It can be realized that the rotating ring descends along the inner wall of the measuring cylinder during the rotation of the rotating ring, and at the same time, the cleaning agent is transported to the inside of the rotating ring through the first liquid tank. During the descent of the rotating ring, the cleaning agent continuously flows through the leakage hole to the wiping cloth, and the inner wall of the measuring cylinder is wiped by the wiping cloth. When the rotating ring rises back upward, clean water is transported to the inside of the rotating ring through the second liquid tank. During the ascent of the rotating ring, the clean water flows through the leakage hole to the wiping cloth, and the residual cleaning agent is cleaned by the clean water to improve the cleaning effect.

[0008] 2. Technical solution

[0009] To solve the above problems, the present invention adopts the following technical solutions.

[0010] A metrological calibration device for eliminating the influence of temperature difference on calibration error of a fuel dispenser comprises a base, a measuring cylinder being fixedly connected to the left side of the upper end face of the base, a lower end of the measuring cylinder being tapered and extending to the bottom of the base, an observation port being provided at the center position of the front side face of the base, a standard scale line being engraved on the right side of the observation port, a fueling pipe being connected to the center position of the left side face of the measuring cylinder, a spiral heating wire being embedded in the interior of the cylinder body of the lower half of the measuring cylinder, annular mounting grooves being uniformly provided on the outer surface of the lower half of the measuring cylinder, a cooling fin being embedded and fixedly connected in the mounting groove, and a cleaning mechanism being provided inside the measuring cylinder;

[0011] The cleaning mechanism includes a rotating ring suspended at the center of the measuring cylinder. A circular arc-shaped wiping cloth is fixedly connected to the annular outer side of the rotating ring. The rotating ring can rotate along the inner wall of the measuring cylinder and move downward to deeply clean the inner wall of the measuring cylinder.

[0012] Furthermore, a horizontal plate is provided at the inner center position of the swivel, and the left and right ends of the horizontal plate are fixedly connected to the inner wall of the swivel respectively. A rod sleeve is rotatably connected to the center position of the upper end surface of the horizontal plate, and a first screw rod is connected to the inner thread transmission of the rod sleeve. The first screw rod passes through the top of the fixed seat, and the first screw rod and the fixed seat are rotatably connected through a bearing.

[0013] Furthermore, the upper end of the first screw rod is fixedly connected to the third pulley, the upper end face of the measuring cylinder on the left side of the third pulley is fixedly connected to the L-shaped frame, the right side of the third pulley is connected to the second pulley through a belt rotation, the frame above the second pulley is fixedly connected to the motor, and the output shaft of the motor is fixedly connected to the center position of the upper end face of the second pulley.

[0014] Furthermore, a fixing rod is fixedly connected to the lower end surface of the fixing seat symmetrically on both sides, a fixing plate is provided on the sliding sleeve below the outer side of the rod sleeve, and the lower ends of the fixing rods are fixedly connected to the corresponding positions of the upper end surface of the fixing plate.

[0015] Furthermore, a limiting block with a rectangular strip structure is fixedly connected symmetrically to the outer side surface of the rod sleeve ring, and a limiting groove matching the limiting block is opened on the fixing plate.

[0016] Furthermore, a fixed shaft is fixedly connected to the center position of the lower end surface of the second pulley, and a fourth pulley is fixedly connected to the lower end of the fixed shaft. The first pulley is rotatably connected to the fixed seat on the left side of the fourth pulley. The first pulley and the fourth pulley are rotatably connected through a belt. The lower end surface of the first pulley is fixedly connected to a guide rod symmetrically on the left and right, and a sleeve is provided on the sliding sleeve of the guide rod, and the lower ends of the sleeves are fixedly connected to the corresponding positions of the upper end surface of the horizontal plate.

[0017] Furthermore, a first liquid tank with an annular cavity structure is fixedly connected to the outer surface of the measuring cylinder below the fourth pulley, a first piston with a circular ring structure matching it is provided at the upper end of the interior of the first liquid tank, a second screw rod is fixedly connected to the center position of the lower end surface of the fourth pulley, the lower end of the second screw rod passes through to the bottom of the first liquid tank, and the first piston is threadedly connected to the second screw rod.

[0018] Furthermore, a first liquid outlet pipe is connected to the center of the lower end surface of the front side of the first liquid tank, and the first liquid outlet pipe passes through the interior of the measuring cylinder and is located above the rotating ring. A liquid cavity with a circular hollow structure is opened inside the rotating ring, and a number of leakage holes that pass through the interior of the liquid cavity are equidistantly opened on the annular outer surface of the rotating ring, and the first liquid outlet pipe is connected to the liquid cavity.

[0019] Furthermore, a second liquid tank with an annular cavity structure is fixedly connected to the upper end surface of the base located outside the measuring cylinder below the first liquid tank. The height of the second liquid tank is twice that of the first liquid tank, and the inner and outer diameters of the second liquid tank are consistent with those of the first liquid tank. A second piston matching the second piston is provided at the lower end of the interior of the second liquid tank. A second liquid outlet pipe is connected to the lower end of the rear side surface of the second liquid tank. The second liquid outlet pipe passes through the interior of the measuring cylinder and is connected to the liquid cavity.

[0020] The lower end of the second screw rod passes through the lower end surface of the second liquid tank and is rotatably connected to the lower end surface of the second liquid tank. The second piston is threadedly connected to the second screw rod. The lead of the second screw rod inside the second liquid tank is twice the lead of the second screw rod inside the first liquid tank.

[0021] Furthermore, a liquid storage cylinder is fixedly connected to the upper end surface of the base on the right side of the second liquid tank, and a partition is fixedly connected to the inside of the liquid storage cylinder at a position flush with the lower end surface of the first liquid tank. The lower end of the right side surface of the first liquid tank is connected to the left side surface of the liquid storage cylinder near the upper end of the partition through a first liquid inlet pipe, the lower end of the right side surface of the second liquid tank is connected to the lower end of the left side surface of the liquid storage cylinder through a second liquid inlet pipe, the upper end of the right side surface of the liquid storage cylinder is connected to a first liquid adding pipe, and the right side surface of the liquid storage cylinder is connected to a second liquid adding pipe near the position below the partition.

[0022] 3. Beneficial effects

[0023] Compared with the prior art, the advantages of the present invention are:

[0024] 1. This solution embeds a spiral heating wire inside the lower half of the cylinder to keep the cylinder warm. This allows the cylinder to maintain a normal room temperature in the cold winter, avoiding large temperature differences that cause the fuel volume to shrink, thereby reducing verification errors.

[0025] 2. This solution evenly opens annular mounting grooves on the outer surface of the lower half of the measuring cylinder. A cooling fin is embedded and fixed in the mounting groove. The cooling fin cools the measuring cylinder in hot summer, preventing the measuring cylinder from overheating and causing the fuel volume to expand, thereby reducing verification errors.

[0026] 3. In this solution, the ring descends along the inner wall of the measuring cylinder during its rotation, and at the same time, the cleaning agent is transported into the inside of the ring through the first liquid tank. During the descent of the ring, the cleaning agent continuously flows through the leakage hole onto the rag, and the rag scrubs the inner wall of the measuring cylinder, thereby improving the cleaning effect of the fuel.

[0027] 4. In this solution, when the swivel is rising, clean water is transported into the swivel through the second liquid tank. During the swivel's rise, the clean water flows through the leak hole onto the rag, and the clean water is used to clean away any remaining detergent, preventing detergent from remaining in the graduated cylinder and affecting subsequent fuel verification. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a three-dimensional diagram of the overall structure of the present invention;

[0029] Figure 2 It is a half-section schematic diagram of the overall structure of the present invention;

[0030] Figure 3 This is a schematic diagram of the cleaning mechanism of the present invention;

[0031] Figure 4 A top view of the present invention;

[0032] Figure 5 For the present invention Figure 4 The cross-sectional view at AA in the figure;

[0033] Figure 6 For the present invention Figure 4 Cross-sectional view at BB in the figure;

[0034] Figure 7 For the present invention Figure 5 Enlarged view of point C in the figure;

[0035] Figure 8 For the present invention Figure 5 The enlarged view of point D in the figure;

[0036] Figure 9 For the present invention Figure 1 Enlarged view of point E in .

[0037] Description of the numbers in the figure:

[0038] 1. Base; 11. Graduated cylinder; 12. Observation port; 13. Standard scale mark; 14. Heating wire; 15. Mounting slot; 16. Cooling plate; 17. Filling pipe;

[0039] Cleaning mechanism: 2. Fixed seat; 21. First screw rod; 22. Rod sleeve; 23. Limit block; 24. Fixed plate; 25. Limit groove; 26. Fixed rod; 3. First pulley; 31. Guide rod; 32. Sleeve; 33. Cross plate; 34. Rotating ring; 35. Leak hole; 36. Liquid chamber; 37. Wipe; 4. Motor; 41. Frame; 42. Second pulley; 43. Third pulley; 44. Fourth pulley; 45. Fixed shaft; 5. First liquid tank; 51. First piston; 52. First liquid inlet pipe; 53. First liquid outlet pipe; 6. Second screw rod; 7. Second liquid tank; 71. Second piston; 72. Second liquid inlet pipe; 73. Second liquid outlet pipe; 8. Liquid storage cylinder; 81. Partition; 82. First liquid adding pipe; 83. Second liquid adding pipe. DETAILED DESCRIPTION

[0040] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0041] In the description of the present invention, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0042] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "provided with," "mounted / connected," and "connected" should be understood in a broad sense. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be internal communication between two components. Those skilled in the art will be able to understand the specific meanings of the above terms in the present invention in specific circumstances.

[0043] Example 1:

[0044] See also Figures 1-9 , a metrological calibration device for eliminating the influence of temperature difference on the calibration error of a fuel dispenser, comprising a base 1, a measuring cylinder 11 being fixedly connected to the left side of the upper end face of the base 1, the lower end of the measuring cylinder 11 being conical in structure and extending to the bottom of the base 1, an observation port 12 being provided at the center position of the front side face of the base 1, a standard scale line 13 being engraved on the right side of the observation port 12, a refueling pipe 17 being connected at the center position of the left side face of the measuring cylinder 11, a spiral heating wire 14 being buried inside the cylinder body of the lower half of the measuring cylinder 11, an annular mounting groove 15 being evenly provided on the outer surface of the lower half of the measuring cylinder 11, a cooling plate 16 being embedded and fixedly connected in the mounting groove 15, a cleaning mechanism being provided inside the measuring cylinder 11; the cleaning mechanism comprising a rotating ring 34 suspended at the center position inside the measuring cylinder 11, a circular arc-shaped wiping cloth 37 being fixedly connected to the annular outer side face of the rotating ring 34, the rotating ring 34 being able to rotate along the inner wall of the measuring cylinder 11 and simultaneously move downward to deeply clean the inner wall of the measuring cylinder 11.

[0045] When it is cold in winter, the power supply of the heating wire 14 is turned on to make the heating wire 14 heat up and thus heat the lower half of the cylinder 11, so that the temperature of the measuring cylinder 11 is consistent with the temperature of the oil storage chamber inside the fuel dispenser, avoiding the expansion of the fuel volume due to excessive temperature, and reducing the influence of the temperature difference on the test results. When it is hot in summer, the temperature of the refrigeration plate 16 is turned on to cool the measuring cylinder 11, so that the temperature of the measuring cylinder 11 is consistent with the temperature of the oil storage chamber inside the fuel dispenser, avoiding the reduction of the fuel volume due to excessive temperature, and reducing the influence of the temperature difference on the test results. After the temperature difference is corrected, the standard volume of fuel in the fuel dispenser is added to the measuring cylinder 11 through the filling pipe 17, and the fuel is observed through the observation port 12 to observe whether it reaches the standard scale line. At position 13, if it reaches the standard scale line 13, it indicates that the measurement of the fuel dispenser is accurate. If it exceeds or is lower than the standard scale line 13, it indicates that the measurement of the fuel dispenser is inaccurate and needs to be adjusted to avoid economic losses to itself or consumers. After the calibration is completed, the fuel is drained through the oil drain pipe under the measuring cylinder 11, and then the swivel 34 that can rotate along the inner wall of the measuring cylinder 11 and move downward at the same time drives the wiping cloth 37 to wipe off the residual fuel attached to the inner wall of the measuring cylinder 11, so as to avoid the residual fuel affecting the subsequent fuel calibration. Since the swivel 34 is higher than the standard scale line 13, the fuel will not contact the swivel 34 after entering the measuring cylinder 11, so as to avoid the swivel 34 affecting the calibration result of the fuel volume.

[0046] As an embodiment of the present invention, refer to Figure 2 、 Figure 3 、 Figure 5 、 Figure 6 and Figure 7 A horizontal plate 33 is provided at the center position of the internal part of the swivel 34. The left and right ends of the horizontal plate 33 are fixedly connected to the inner wall of the swivel 34 respectively. The center position of the upper end surface of the horizontal plate 33 is rotatably connected to the rod sleeve 22. The internal thread transmission of the rod sleeve 22 is connected to the first screw rod 21. The first screw rod 21 passes through the top of the fixed seat 2, and the first screw rod 21 is rotatably connected to the fixed seat 2 through a bearing. The upper end of the first screw rod 21 is fixedly connected to the third pulley 43. The upper end surface of the measuring cylinder 11 on the left side of the third pulley 43 is fixedly connected to the L-shaped structure frame 41. The right side of the third pulley 43 is rotated by a belt. A second pulley 42 is dynamically connected to the frame 41 above the second pulley 42, and the motor 4 is fixedly connected to the output shaft of the motor 4 and the center position of the upper end surface of the second pulley 42. The lower end surface of the fixed seat 2 is symmetrically fixedly connected with a fixing rod 26, and a fixing disk 24 is provided with a sliding sleeve below the outer side surface of the rod sleeve 22. The lower ends of the fixing rods 26 are respectively fixedly connected to the corresponding positions of the upper end surface of the fixing disk 24. The outer side surface of the annular rod sleeve 22 is symmetrically fixedly connected with a limit block 23 of a rectangular strip structure. A limit groove 25 matching the limit block 23 is provided on the fixed disk 24.

[0047] The center position of the lower end surface of the second pulley 42 is fixedly connected to a fixed shaft 45, the lower end of the fixed shaft 45 is fixedly connected to the fourth pulley 44, the first pulley 3 is rotatably connected to the fixed seat 2 on the left side of the fourth pulley 44, the first pulley 3 and the fourth pulley 44 are rotatably connected through a belt, the lower end surface of the first pulley 3 is fixedly connected to a guide rod 31 symmetrically on the left and right, a sleeve 32 is slidably sleeved on the guide rod 31, and the lower ends of the sleeves 32 are fixedly connected to the corresponding positions of the upper end surface of the cross plate 33.

[0048] When the above scheme is implemented, the starting motor 4 drives the second pulley 42 to rotate counterclockwise, thereby driving the third pulley 43, the fourth pulley 44 and the first pulley 3 to rotate counterclockwise at the same time. The counterclockwise rotation of the first pulley 3 drives the swivel 34 to rotate counterclockwise, and the counterclockwise rotation of the third pulley 43 drives the first screw rod 21 to rotate counterclockwise, so that the rod sleeve 22 slides downward along the first screw rod 21. Since the sleeve 32 is slidably mounted on the guide rod 31, the sleeve 32 can slide downward along the guide rod 31. The cooperation of the guide rod 31 and the sleeve 32 can ensure the stable rotation of the swivel 34, and the fixed plate 24 and the fixed rod 26 slidably mounted on the outside of the rod sleeve 22 can limit the rod sleeve 22, so that the rod sleeve 22 can slide downward along the first screw rod 21, and the swivel 34 descends while rotating, thereby improving the wiping effect of the wiping cloth 37 on the inner wall of the measuring cylinder 11, thereby improving the cleaning effect.

[0049] As an embodiment of the present invention, referring to the figure, a first liquid tank 5 with an annular cavity structure is fixedly connected to the outer surface of the measuring cylinder 11 below the fourth pulley 44, and a first piston 51 with a circular ring structure matching it is provided at the upper end of the first liquid tank 5. A second screw rod 6 is fixedly connected to the center position of the lower end surface of the fourth pulley 44, and the lower end of the second screw rod 6 passes through the bottom of the first liquid tank 5, and the first piston 51 is threadedly connected to the second screw rod 6. A first liquid outlet pipe 53 is connected to the center position of the lower end surface of the front side of the first liquid tank 5, and the first liquid outlet pipe 53 passes through the interior of the measuring cylinder 11 and is located above the rotating ring 34. A liquid cavity 36 with an annular cavity structure is opened inside the rotating ring 34, and a number of leakage holes 35 that pass through the interior of the liquid cavity 36 are equidistantly opened on the annular outer surface of the rotating ring 34, and the first liquid outlet pipe 53 is connected to the liquid cavity 36.

[0050] A second liquid tank 7 with an annular cavity structure is fixedly connected to the upper end surface of the base 1 located outside the measuring cylinder 11 below the first liquid tank 5. The height of the second liquid tank 7 is twice that of the first liquid tank 5, and the inner diameter and outer diameter of the second liquid tank 7 are consistent with those of the first liquid tank 5. The lower end of the interior of the second liquid tank 7 is provided with a second piston 71 that matches it, and the lower end of the rear side of the second liquid tank 7 is connected to a second liquid outlet pipe 73, which passes through the interior of the measuring cylinder 11 and is connected to the liquid cavity 36. The lower end of the second screw rod 6 passes through the lower end surface of the second liquid tank 7 and is rotatably connected to the lower end surface of the second liquid tank 7. The second piston 71 is threadedly connected to the second screw rod 6, and the lead of the second screw rod 6 inside the second liquid tank 7 is twice the lead of the second screw rod 6 inside the first liquid tank 5;

[0051] The upper end face of the base 1 on the right side of the second liquid tank 7 is fixedly connected to a liquid storage cylinder 8, and a partition 81 is fixedly connected to the inside of the liquid storage cylinder 8 at a position flush with the lower end face of the first liquid tank 5. The lower end of the right side face of the first liquid tank 5 is connected to the left side face of the liquid storage cylinder 8 near the upper end of the partition 81 through a first liquid inlet pipe 52, and the lower end of the right side face of the second liquid tank 7 is connected to the lower end of the left side face of the liquid storage cylinder 8 through a second liquid inlet pipe 72. The upper end of the right side face of the liquid storage cylinder 8 is connected to a first liquid adding pipe 82, and the right side face of the liquid storage cylinder 8 is connected to a second liquid adding pipe 83.

[0052] When the above scheme is implemented, in the initial state, the first liquid tank 5 is full of cleaning agent, and the second liquid tank 7 is in an empty tank state. When the fourth pulley 44 rotates counterclockwise, it will drive the second screw rod 6 to rotate counterclockwise synchronously, and the thread direction of the second screw rod 6 in the first liquid tank 5 is opposite to the thread direction of the second screw rod 6 in the second liquid tank 7, so that the first piston 51 moves downward and the second piston 71 moves upward. At this time, the one-way valves in the first liquid inlet pipe 52 and the second liquid outlet pipe 73 are closed, and the one-way valves in the first liquid outlet pipe 53 and the second liquid inlet pipe 72 are opened, so that the cleaning agent in the first liquid tank 5 is injected into the liquid cavity 36 inside the rotating ring 34 through the first liquid outlet pipe 53, and the clean water below the partition 81 inside the liquid storage cylinder 8 is injected into the second liquid tank 7 through the second liquid inlet pipe 72. The cleaning agent injected into the liquid chamber 36 flows evenly onto the wiping cloth 37 through the leakage hole 35 during the process of the rotating ring 34 rotating and descending, and the residual fuel adhering to the inner wall of the measuring cylinder 11 is cleaned by the wiping cloth 37. Since the height of the second liquid tank 7 is twice that of the first liquid tank 5, the inner diameter and outer diameter of the second liquid tank 7 are consistent with those of the first liquid tank 5, and the lead of the second screw rod 6 inside the second liquid tank 7 is twice the lead of the second screw rod 6 inside the first liquid tank 5, when the rotating ring 34 moves to the lower end of the interior of the measuring cylinder 11, the first piston 51 moves to the lower end of the interior of the first liquid tank 5, and the second piston 71 moves to the upper end of the interior of the second liquid tank 7, so that the cleaning agent in the first liquid tank 5 is drained and the second liquid tank 7 is filled with clean water. Then the motor 4 is started to drive the second pulley 4 2 rotates clockwise, thereby driving the third pulley 43, the fourth pulley 44 and the first pulley 3 to rotate clockwise synchronously, causing the first screw rod 21 to rotate clockwise, and the rod sleeve 22 begins to slide upward and reset along the first screw rod 21, causing the swivel 34 to rise while rotating clockwise with the sleeve 32. When the fourth pulley 44 rotates clockwise, the second screw rod 6 also rotates clockwise, causing the first piston 51 to move upward and the second piston 71 to move downward. At this time, the one-way valves in the first liquid inlet pipe 52 and the second liquid outlet pipe 73 are opened, and the one-way valves in the first liquid outlet pipe 53 and the second liquid inlet pipe 72 are closed, so that the cleaning agent above the partition 81 inside the liquid storage cylinder 8 is replenished into the first liquid tank 5 through the first liquid inlet pipe 52, and the clean water in the second liquid tank 7 is discharged. The clean water is injected into the liquid cavity 36 inside the swivel 34 through the second liquid outlet pipe 73. As the swivel 34 rises, the clean water continuously flows through the leakage hole 35 to the wiping cloth 37, while rinsing the wiping cloth 37. The cleaning agent remaining on the inner wall of the measuring cylinder 11 is cleaned to prevent the residual cleaning agent from interfering with the subsequent fuel inspection. The parts of the first liquid outlet pipe 53 and the second liquid outlet pipe 73 located inside the measuring cylinder 11 are made of elastic rubber and have a spiral structure, so that the first liquid outlet pipe 53 and the second liquid outlet pipe 73 can extend around the outside of the two sleeves 32 when the swivel 34 rotates and descends. When the swivel 34 rotates and rises to reset, the first liquid outlet pipe 53 and the second liquid outlet pipe 73 are reset under the action of their own elastic force, thereby ensuring the normal operation of the swivel 34.When the cleaning agent and clean water in the liquid storage cylinder 8 are used up, cleaning agent can be added to the liquid storage cylinder 8 above the partition 81 through the first liquid adding pipe 82, and clean water can be added to the liquid storage cylinder 8 below the partition 81 through the second liquid adding pipe 83 to ensure the normal operation of the device.

[0053] Working principle: When it is cold in winter, the power supply of the heating wire 14 is turned on to make the heating wire 14 heat up and thus heat the lower half of the cylinder 11, so that the temperature of the measuring cylinder 11 is consistent with the temperature of the oil storage chamber inside the fuel dispenser, avoiding the expansion of the fuel volume due to excessively high temperature, and reducing the influence of temperature difference on the test result. When it is hot in summer, the temperature of the refrigeration plate 16 is turned on to cool the measuring cylinder 11, so that the temperature of the measuring cylinder 11 is consistent with the temperature of the oil storage chamber inside the fuel dispenser, avoiding the reduction of the fuel volume due to excessively low temperature, and reducing the influence of temperature difference on the test result. After the temperature difference is corrected, the standard volume of fuel in the fuel dispenser is added into the measuring cylinder 11 through the filling pipe 17, and the fuel is observed through the observation port 12 to see whether it reaches the standard scale line 13. If it reaches the standard scale line 13, it indicates that the measurement of the fuel dispenser is accurate. If it exceeds or falls below the standard scale line 13, it indicates that the measurement of the fuel dispenser is inaccurate and needs to be adjusted to avoid economic losses to itself or consumers.

[0054] After the calibration is completed, the fuel is drained through the oil drain pipe below the measuring cylinder 11, and the starting motor 4 drives the second pulley 42 to rotate counterclockwise, thereby driving the third pulley 43, the fourth pulley 44 and the first pulley 3 to rotate counterclockwise at the same time. The counterclockwise rotation of the first pulley 3 drives the swivel 34 to rotate counterclockwise, and the counterclockwise rotation of the third pulley 43 drives the first screw rod 21 to rotate counterclockwise, so that the rod sleeve 22 slides downward along the first screw rod 21. Since the sleeve 32 is slidably mounted on the guide rod 31, the sleeve 32 can slide downward along the guide rod 31. The cooperation of the guide rod 31 and the sleeve 32 can ensure the stable rotation of the swivel 34, and the fixed plate 24 and the fixed rod 26 slidably mounted on the outside of the rod sleeve 22 can limit the rod sleeve 22, so that the rod sleeve 22 can slide downward along the first screw rod 21, and the swivel 34 descends while rotating;

[0055] In the initial state, the first liquid tank 5 is filled with cleaning agent, and the second liquid tank 7 is in an empty tank state. When the fourth pulley 44 rotates counterclockwise, it will drive the second screw rod 6 to rotate counterclockwise synchronously, and the thread direction of the second screw rod 6 in the first liquid tank 5 is opposite to the thread direction of the second liquid tank 7, so that the first piston 51 moves downward and the second piston 71 moves upward. At this time, the one-way valves in the first liquid inlet pipe 52 and the second liquid outlet pipe 73 are closed, and the one-way valves in the first liquid outlet pipe 53 and the second liquid inlet pipe 72 are opened, so that the cleaning agent in the first liquid tank 5 is injected into the liquid cavity 36 inside the rotating ring 34 through the first liquid outlet pipe 53, and the clean water under the partition 81 inside the liquid storage cylinder 8 is injected into the second liquid tank 7 through the second liquid inlet pipe 72, and the liquid cavity 36 is injected into the second liquid tank 7. As the rotating ring 34 rotates and descends, the cleaning agent flows evenly through the leakage hole 35 to the wiping cloth 37, and the residual fuel attached to the inner wall of the measuring cylinder 11 is cleaned by the wiping cloth 37. Since the height of the second liquid tank 7 is twice that of the first liquid tank 5, the inner diameter and outer diameter of the second liquid tank 7 are consistent with the first liquid tank 5, and the lead of the second screw rod 6 inside the second liquid tank 7 is twice the lead of the second screw rod 6 inside the first liquid tank 5, when the rotating ring 34 moves to the lower end of the interior of the measuring cylinder 11, the first piston 51 moves to the lower end of the interior of the first liquid tank 5, and the second piston 71 moves to the upper end of the interior of the second liquid tank 7, so that the cleaning agent in the first liquid tank 5 is drained and the second liquid tank 7 is filled with clean water. Then the motor 4 is started to drive the second pulley 42 clockwise. The first pulley 21 rotates clockwise, thereby driving the third pulley 43, the fourth pulley 44 and the first pulley 3 to rotate synchronously in a clockwise direction, so that the first screw rod 21 rotates clockwise, and the rod sleeve 22 starts to slide upward and reset along the first screw rod 21, so that the swivel 34 rises while rotating clockwise with the sleeve 32. When the fourth pulley 44 rotates clockwise, the second screw rod 6 also rotates clockwise, causing the first piston 51 to move upward and the second piston 71 to move downward. At this time, the one-way valves in the first liquid inlet pipe 52 and the second liquid outlet pipe 73 are opened, and the one-way valves in the first liquid outlet pipe 53 and the second liquid inlet pipe 72 are closed, so that the cleaning agent above the partition 81 inside the liquid storage cylinder 8 is replenished into the first liquid tank 5 through the first liquid inlet pipe 52, and the clean water in the second liquid tank 7 is replenished into the first liquid tank 5 through the first liquid inlet pipe The two liquid outlet pipes 73 are injected into the liquid cavity 36 inside the swivel 34. As the swivel 34 rises, clean water continuously flows through the leakage hole 35 to the wiping cloth 37, while rinsing the wiping cloth 37. At the same time, the cleaning agent remaining on the inner wall of the measuring cylinder 11 is cleaned to prevent the residual cleaning agent from interfering with the subsequent fuel inspection. The parts of the first liquid outlet pipe 53 and the second liquid outlet pipe 73 located inside the measuring cylinder 11 are made of elastic rubber and have a spiral structure, so that the first liquid outlet pipe 53 and the second liquid outlet pipe 73 can extend around the outside of the two sleeves 32 as the swivel 34 rotates and descends. When the swivel 34 rotates and rises to reset, the first liquid outlet pipe 53 and the second liquid outlet pipe 73 are reset under the action of their own elastic force, thereby ensuring the normal operation of the swivel 34.

[0056] The above are only preferred embodiments of the present invention; however, the scope of protection of the present invention is not limited thereto. Any person skilled in the art who, within the technical scope disclosed by the present invention, makes equivalent substitutions or modifications based on the technical solutions and improved concepts of the present invention shall be covered by the scope of protection of the present invention.

Claims

1. A metrological calibration device for eliminating the influence of temperature difference on calibration error of a fuel dispenser, comprising a base (1), characterized in that: A measuring cylinder (11) is fixedly connected to the left side of the upper end face of the base (1), the lower end of the measuring cylinder (11) is in a conical structure and extends to the bottom of the base (1), an observation port (12) is provided at the center position of the front side face of the base (1), a standard scale line (13) is engraved on the right side of the observation port (12), a refueling pipe (17) is connected to the center position of the left side face of the measuring cylinder (11), a spiral heating wire (14) is buried inside the cylinder body of the lower half of the measuring cylinder (11), an annular mounting groove (15) is evenly provided on the outer surface of the lower half of the measuring cylinder (11), a cooling plate (16) is embedded and fixedly connected in the mounting groove (15), and a cleaning mechanism is provided inside the measuring cylinder (11); The cleaning mechanism comprises a rotating ring (34) suspended at the center of the measuring cylinder (11), a circular arc-shaped wiping cloth (37) being fixedly connected to the annular outer side surface of the rotating ring (34), and the rotating ring (34) can rotate along the inner wall of the measuring cylinder (11) and move downward at the same time to deeply clean the inner wall of the measuring cylinder (11); A transverse plate (33) is provided at the center position of the inner portion of the rotating ring (34), and the left and right ends of the transverse plate (33) are fixedly connected to the inner side wall of the rotating ring (34), respectively. A rod sleeve (22) is rotatably connected to the center position of the upper end surface of the transverse plate (33), and the inner thread of the rod sleeve (22) is connected to the first screw rod (21). The upper end of the first screw rod (21) is fixedly connected to the third pulley (43), and the right side of the third pulley (43) is rotatably connected to the second pulley (42) through a belt. A fixed shaft (45) is fixedly connected to the center position of the lower end surface of the second pulley (42), and the lower end of the fixed shaft (45) is fixedly connected to the A fourth pulley (44) is connected, and a first liquid tank (5) with an annular cavity structure is fixedly connected to the outer surface of the measuring cylinder (11) below the fourth pulley (44), and a first liquid outlet pipe (53) is connected to the center of the lower end surface of the front side of the first liquid tank (5), and the first liquid outlet pipe (53) passes through the inside of the measuring cylinder (11) and is located above the rotating ring (34), and a liquid cavity (36) with an annular cavity structure is opened inside the rotating ring (34), and a plurality of leakage holes (35) that pass through the inside of the liquid cavity (36) are opened at equal intervals on the annular outer surface of the rotating ring (34), and the first liquid outlet pipe (53) is connected to the liquid cavity (36).

2. A measurement and calibration device for eliminating the influence of temperature difference on fuel dispenser calibration error according to claim 1, characterized in that: The first screw rod (21) passes through the upper portion of the fixing seat (2), and the first screw rod (21) and the fixing seat (2) are rotatably connected via a bearing.

3. The measurement and calibration device for eliminating the influence of temperature difference on fuel dispenser calibration error according to claim 2, characterized in that: The upper end surface of the measuring cylinder (11) on the left side of the third pulley (43) is fixedly connected to a frame (41) with an L-shaped structure, and the frame (41) above the second pulley (42) is fixedly connected to a motor (4), and the output shaft of the motor (4) is fixedly connected to the center position of the upper end surface of the second pulley (42).

4. The measurement and calibration device for eliminating the influence of temperature difference on fuel dispenser calibration error according to claim 2, characterized in that: The lower end surface of the fixing seat (2) is fixedly connected to a fixing rod (26) in a symmetrical manner. A fixing plate (24) is provided on the sliding sleeve below the outer side surface of the rod sleeve (22). The lower ends of the fixing rods (26) are fixedly connected to corresponding positions on the upper end surface of the fixing plate (24).

5. The measurement and calibration device for eliminating the influence of temperature difference on fuel dispenser calibration error according to claim 4, characterized in that: A rectangular strip-shaped limiting block (23) is fixedly connected to the annular outer side surface of the rod sleeve (22) in a bilaterally symmetrical manner, and a limiting groove (25) matching the limiting block (23) is provided on the fixing plate (24).

6. The measurement and calibration device for eliminating the influence of temperature difference on fuel dispenser calibration error according to claim 3, characterized in that: A first pulley (3) is rotatably connected to the fixed seat (2) on the left side of the fourth pulley (44), and the first pulley (3) and the fourth pulley (44) are rotatably connected via a belt. A guide rod (31) is symmetrically fixedly connected to the lower end surface of the first pulley (3), and a sleeve (32) is slidably sleeved on the guide rod (31), and the lower end of the sleeve (32) is fixedly connected to the corresponding position of the upper end surface of the transverse plate (33).

7. The measurement and calibration device for eliminating the influence of temperature difference on fuel dispenser calibration error according to claim 6, characterized in that: A first piston (51) with a matching annular structure is provided at the upper end of the first liquid tank (5), and a second screw rod (6) is fixedly connected to the center of the lower end surface of the fourth pulley (44). The lower end of the second screw rod (6) extends to the bottom of the first liquid tank (5), and the first piston (51) is connected to the second screw rod (6) by threaded transmission.

8. The measurement and calibration device for eliminating the influence of temperature difference on fuel dispenser calibration error according to claim 7, characterized in that: A second liquid tank (7) with an annular cavity structure is fixedly connected to the upper end surface of the base (1) located outside the measuring cylinder (11) below the first liquid tank (5), the height of the second liquid tank (7) is twice that of the first liquid tank (5), and the inner diameter and outer diameter of the second liquid tank (7) are consistent with those of the first liquid tank (5), the lower end of the interior of the second liquid tank (7) is provided with a second piston (71) matched therewith, and the lower end of the rear side surface of the second liquid tank (7) is connected to a second liquid outlet pipe (73), and the second liquid outlet pipe (73) passes through the interior of the measuring cylinder (11) and is connected to the liquid cavity (36); The lower end of the second screw rod (6) passes through the lower end surface of the second liquid tank (7) and is rotatably connected to the lower end surface of the second liquid tank (7). The second piston (71) is threadedly connected to the second screw rod (6). The lead of the second screw rod (6) inside the second liquid tank (7) is twice the lead of the second screw rod (6) inside the first liquid tank (5).

9. The measurement and calibration device for eliminating the influence of temperature difference on fuel dispenser calibration error according to claim 8, characterized in that: The upper end surface of the base (1) on the right side of the second liquid tank (7) is fixedly connected to a liquid storage cylinder (8), and a partition (81) is fixedly connected to the inside of the liquid storage cylinder (8) at a position flush with the lower end surface of the first liquid tank (5). The lower end of the right side surface of the first liquid tank (5) is connected to the left side surface of the liquid storage cylinder (8) near the upper end of the partition (81) through a first liquid inlet pipe (52), and the lower end of the right side surface of the second liquid tank (7) is connected to the lower end of the left side surface of the liquid storage cylinder (8) through a second liquid inlet pipe (72). The upper end of the right side surface of the liquid storage cylinder (8) is connected to a first liquid adding pipe (82), and the right side surface of the liquid storage cylinder (8) is connected to a second liquid adding pipe (83) near the lower end of the partition (81).

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