CN214031718U - Oil gun calibrating installation - Google Patents

Abstract

The application discloses oil gun calibrating installation, including have the measurement container that holds the chamber and with hold the oil filler pipe of chamber intercommunication, hold the intracavity and be provided with the first temperature sensor who measures and hold intracavity liquid temperature and measure the level sensor who holds intracavity liquid level, be provided with the second temperature sensor who measures oil gun outlet temperature in the oil filler pipe, oil gun calibrating installation still include with data processing module that first temperature sensor, second temperature sensor and level sensor electricity are connected, with the display module that data processing module electricity is connected, data processing module with display module is fixed in the measurement container, display module can show the data and the final verification result of verification in-process. Through with data processing module and display module fixed mounting on calibrating installation, make it become an organic whole structure, need not to connect the computer again and show like traditional calibrating installation, made things convenient for the staff to read data.

Description

Oil gun calibrating installation

Technical Field

The utility model belongs to flowmeter check out test set field especially relates to an oil gun calibrating installation.

Background

The maximum allowable error of the fuel dispenser is +/-0.3% and the repeatability of the fuel dispenser is not more than +/-0.1% as required in JJG443-2015 'Fuel dispenser verification procedure' 5.1. And the verification period of the oiling machine does not exceed 6 months, namely, the next verification period does not exceed 6 months as long as the oiling machine is qualified after verification no matter whether the adjustment is carried out in the verification process.

In a traditional calibration mode, a calibration worker firstly needs to level a standard measuring device, and after an oiling machine quantitatively oils into the standard measuring device, the temperature at the outlet of a gun, the oil temperature in the measuring device and the corresponding liquid level height of a vernier caliper are manually read. And recording, and calculating the actual oil gun precision according to a standard calculation formula. In the period, manual reading errors, operation errors, manual data recording errors and the like are necessarily introduced, each factor directly influences the verification result, and meanwhile, heavy work is brought to verification personnel. In order to solve the problems, most manufacturers install a temperature sensor and a liquid level sensor in an oil gun calibrating device to automatically measure parameters such as the temperature at the outlet of an oil gun, the oil temperature and the liquid level in the oil gun calibrating device, and then transmit the data to a computer, wherein the computer contains a calibrating calculation program, and the actual volume value and the volume indicating value error (namely the oil gun precision) of a measuring device at the calibrating temperature are respectively calculated according to the received liquid level, the gun outlet oil temperature and the container inner oil temperature and the formulas 7.4.1 and 7.4.2 in JJJG 443-2015 fuel oiling machine.

However, the whole volume of the detection device is large, the power supply end adopts the explosion-proof design, and although the explosion-proof design can meet the requirement of the explosion-proof design, the volume and the weight are increased, and heavy burden is still brought to verification work. The display end and the standard gauge are of a split structure, so that the reading is inconvenient and the movement is inconvenient. The detection of all oil guns of the gas station can be met only by supplying power from the outside and reserving a longer power line for the equipment. In addition, most manufacturers do not have a drainage and turbulence layer at the oil filling port, and when oil is filled into the metering neck from the oil filling port, volatilization and oil foam are generated, so that the metering precision is influenced. The accurate liquid level data of the oil product can be detected only by leveling the equipment in advance when the equipment is calibrated, the requirement on a calibration site is high, and the operation is very complicated.

SUMMERY OF THE UTILITY MODEL

The utility model provides an oil gun calibrating installation to solve at least one technical problem among the above-mentioned technical problem.

The utility model discloses the technical scheme who adopts does:

the utility model provides an oil gun calibrating installation, including have the metering container that holds the chamber and with hold the oil filler pipe of chamber intercommunication, hold the intracavity and be provided with the first temperature sensor who measures and hold intracavity liquid temperature and measure the level sensor who holds intracavity liquid level, be provided with the second temperature sensor who measures oil gun outlet temperature in the oil filler pipe, oil gun calibrating installation still include with data processing module that first temperature sensor, second temperature sensor and level sensor electricity are connected, with the display module that data processing module electricity is connected, data processing module with display module is fixed in the metering container, display module can show the data and the final verification result of examination in-process.

The utility model provides an oil gun calibrating installation still has following additional technical characteristics:

the projection of the liquid level sensor in the vertical direction is located at the center of the bottom wall of the containing cavity, and the liquid level sensor moves up and down along with the liquid level of the liquid in the containing cavity so as to measure the real-time liquid level of the liquid in the containing cavity.

The cavity is divided into a first cavity and a second cavity, and the bottom of the first cavity is communicated with the center of the top of the second cavity through a pipeline.

The oil gun calibrating device is further provided with a transparent pipeline communicated with the first containing cavity and the second containing cavity, and a scale for measuring the liquid level is arranged on the surface of the transparent pipeline.

Still be provided with cellular buffer layer in the filler tube, the oil process during the buffer layer, the buffer layer plays drainage and turbulent flow's effect.

And transparent windows are arranged on the top or/and the side wall of the cavity.

The transparent window, the display module and the oil filling pipe are positioned on the same side.

The oil gun calibrating device further comprises an electric energy storage module electrically connected with the data processing module, and the oil gun calibrating device is in a state of not being connected with a power supply and can be supplied with power by the electric energy storage module.

The oil gun calibrating device further comprises a wireless module electrically connected with the data processing module.

The oil gun calibrating device further comprises a support for supporting the oil gun calibrating device, and a liquid discharge port is formed in the bottom of the accommodating cavity.

Since the technical scheme is used, the utility model discloses the beneficial effect who gains does:

1. the utility model discloses a set up first temperature sensor and level sensor in the appearance chamber of measurement container, set up second temperature sensor in the filler tube, when doing the examination to the oil gun, the temperature of appearance intracavity and the liquid level measurement of liquid can be directly come out with the first temperature sensor and the level sensor of appearance intracavity, the temperature in oil gun exit can be detected out with the second temperature sensor in the filler tube simultaneously, the error that artifical measurement probably arouses has been avoided, calibrating installation still is provided with the data processing module that is connected with above-mentioned temperature sensor and level sensor electricity and the display module that is connected with the data processing module electricity simultaneously, through with data processing module and display module fixed mounting on calibrating installation, make it become an organic whole structure, data processing module will gather and directly show on the display screen with the data after handling, need not like traditional calibrating installation again external computer show, the oil gun has the advantages that the reading of data by workers is facilitated, the display end and the metering container do not need to be moved simultaneously when the workers examine the next oil gun, the convenience is brought to the workers to move equipment, and the working efficiency is improved.

2. As an preferred embodiment of this application, the projection of the vertical direction of level sensor is located hold the central point of chamber diapire and put, just level sensor follows hold intracavity liquid level and reciprocate in order to survey hold the real-time liquid level of intracavity liquid, can remove along with adding the altitude variation of holding intracavity oil liquid level through the body that sets up level sensor at holding intracavity center and level sensor, even if consequently the device has slight slope when doing the examination, hold the liquid level that intracavity oil central point put still can keep original level, consequently can not influence measuring result for the device need not the leveling and can measure, has made things convenient for staff's operation, and has reduced the requirement to the place when examining and determine.

3. As an preferred embodiment of this application, the appearance chamber divide into first appearance chamber and second and holds the chamber, first appearance chamber the bottom through the pipeline with the top central point that the second holds the chamber puts the intercommunication, just pipeline downwardly extending to the lower part that the second holds the chamber, holds the chamber and divide into two and holds the chamber, consequently hold the chamber if can continue to refuel because the existence in first appearance chamber prevents to refuel too much and takes place the oil storage capacity that the overflow increases the appearance chamber when the oil gun is to holding intracavity oil, adds oil pipe simultaneously and sets up on first appearance chamber, can also improve the height of filling oil pipe, makes things convenient for the staff to refuel.

4. As a preferred embodiment of the application, the transparent pipeline with the scale is arranged between the first cavity and the second cavity, when the oil gun is calibrated, if the liquid level sensor fails, the liquid level of oil in the transparent pipeline can be read manually and input into the data processing module or externally connected with a computer for final calibration.

5. As an optimal implementation mode of this application, through set up the honeycomb buffer layer in filling the oil pipe for when the oil gun is refueling to device in, can be at first through the buffer layer that is located in the filling tube from the oil gun exhaust oil, the buffer layer can play drainage and the turbulent flow to the oil, has effectively avoided the oil to directly discharge into the bubble that holds the chamber and probably produce, thereby has guaranteed measuring result's accuracy, improve equipment measurement accuracy.

6. As an optimal implementation mode of the application, the transparent window is arranged on the top or/and the side wall of the cavity of the calibrating device, so that whether oil and oil foam reach the upper end face of the cavity or not can be observed through the transparent window when workers calibrate conveniently, the flow rate of the oil gun can be controlled timely, and the measurement error caused by gun jump of the oil gun is reduced.

7. As an optimal implementation mode of this application, through with transparent window, display module and oil pipe setting in the same one side that holds the chamber, not only make things convenient for the staff to observe the condition of refueling, the staff can also look over real-time data and final verification result in the verification process in real time when refueling, make things convenient for staff's operation.

8. As a preferred embodiment of this application, oil gun calibrating installation still include with the electric energy storage module that the data processing module electricity is connected, oil gun calibrating installation is under the state of not connecting power the electric energy storage module can to the oil gun calibrating installation power supply is through setting up electric energy storage module on calibrating installation for calibrating installation can just supply power by oneself under the condition of not plus power, consequently no longer need extremely long power cord to supply power, has made things convenient for staff's operation, can also avoid probably producing the electric spark and arouse hidden danger such as explosion when the external power supply simultaneously.

9. As an optimal implementation mode of the application, through set up the wireless module of being connected with the data processing module electricity on oil gun calibrating installation for remote equipments such as cell-phone, computer can both be transmitted through wireless module to calibrating installation measuring real-time data and final verification result, have made things convenient for the transmission of information, and the staff can long-rangely read the data simultaneously, need not to be close to calibrating installation, avoids calibrating installation probably to take place the accident and causes personnel's injury at the verification in-process, has guaranteed staff's safety.

10. As a preferred embodiment of this application, through setting up the support that supports oil gun calibrating installation, and set up the leakage fluid dram in the bottom that holds the chamber, make things convenient for the discharge of oil after the examination is ended.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:

fig. 1 is an overall structural diagram of the oil gun calibration apparatus according to an embodiment of the present application.

Wherein the content of the first and second substances,

1, a display module, 101 protective covers, 102 display screens and 103 keys;

2, an oil filling pipe, a 201 buffer layer, a 202 second temperature sensor and a 203 detection switch;

the device comprises a 3 cavity, a 31 first cavity, a 311 transparent window, a 32 second cavity, a 33 first temperature sensor, a 34 liquid level sensor and a 341 floating body;

4, a data processing module;

5, pipelines, 501 honeycomb turbulent layer;

6, a transparent pipeline;

7, a bracket and a 701 handle;

and 8 liquid discharging ports.

Detailed Description

In order to more clearly explain the overall concept of the present application, the following detailed description is given by way of example in conjunction with the accompanying drawings.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application, however, the present application may be practiced in other ways than those described herein, and therefore the scope of the present application is not limited by the specific embodiments disclosed below.

In addition, in the description of the present application, it is to be understood that the terms "top," "bottom," "inner," "outer," "circumferential," and the like are used in the orientation or positional relationship shown in the drawings, which are used for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; the connection can be mechanical connection, electrical connection or communication; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

As shown in fig. 1, an oil gun calibrating device includes a metering container having a cavity 3 and an oil filling pipe 2 communicating with the cavity, a first temperature sensor 33 for measuring the temperature of liquid in the cavity and a liquid level sensor 34 for measuring the liquid level in the cavity 3 are disposed in the cavity 3, a second temperature sensor 202 for measuring the temperature of an outlet of an oil gun is disposed in the oil filling pipe 2, the oil gun calibrating device further includes a data processing module 4 electrically connected to the first temperature sensor 33, the second temperature sensor 202 and the liquid level sensor 34, and a display module 1 electrically connected to the data processing module 4, the data processing module 4 is fixed to the metering container with the display module 1, and the display module 1 can display data and final calibration results in a calibration process.

When the oil gun calibrating device is used for calibrating an oil gun, the oil gun needs to be inserted into the oil filling pipe 2, the detection switch 203 is installed near the oil filling pipe opening, and when the oil gun calibrating device detects that the oil gun is inserted, the calibrating device starts to enter a metering mode. During the quantitative oiling process, oil firstly passes through the oil filling pipe 2 and then enters the metering container, after the oil filling is finished and the oil is stabilized for a certain time, the first temperature sensor 33 and the liquid level sensor 34 which are positioned in the metering container can measure the oil temperature and the real-time liquid level of the oil which is filled into the containing cavity 3, the second temperature sensor 202 which is positioned in the oil filling pipe 2 can measure the temperature of the oil at the outlet of the oil gun, the sensors transmit the measured data to the data processing module 4, the data processing module 4 respectively calculates the actual volume value and the volume indicating value error (namely the oil gun precision) of the measuring device at the verification temperature and displays the actual volume value and the volume indicating value error on the display module 1, a worker can complete verification only by simple operations such as oil filling and the like during verification without transmitting the measured data to external computer and other equipment like a traditional verification device and obtaining a verification result by calculation, when the staff examines the next nozzle simultaneously, display module and measurement container owing to be integrative structure, only move calibrating installation can, need not like traditional calibrating installation that measurement container and display end all will move, and saved very long data transmission line, made things convenient for the staff to move equipment, reduced the required cost of examination simultaneously. It should be noted that the display module 1 includes a protective cover 101, a display screen 102, a button 103, and the like, when the oil gun needs to be checked, the protective cover 101 of the display module is opened, and when the checking device is completed to be stored, the protective cover 101 can be closed, so that the display screen 102 of the display module is protected from being affected by the outside during the storage process, so that the display screen becomes blurred, and the observation of data during the checking of the worker is affected.

When oil gun inspection is carried out, because the joints of a power line and a data transmission line exist in the inspection device, electric sparks can be generated in the use process, the inspection device is filled with oil, and the surrounding environment is very easy to cause fire and even explosion, so the outer shell of the inspection device generally adopts an explosion-proof design, but most of the traditional inspection devices adopt an explosion-proof type, the explosion-proof type is an electrical equipment outer shell which can bear the explosion pressure of an internal explosive gas mixture and can prevent the internal explosion from spreading to the explosive mixture around the outer shell, but the outer shell needs to have enough strength, and the joint surfaces of the outer shell need to have enough long meshing length and small clearance to ensure that the internal explosion cannot penetrate through the explosion-proof joint surfaces to cause the explosion of the external environment, so the design has higher production cost and ensures that the explosion-proof joint surfaces cannot penetrate through the explosion-proof joint surfaces after the internal explosion, the equipment volume and the corresponding grow of weight meeting, as the utility model discloses a preferred, the calibrating installation of this application adopts the explosion-proof design of this ampere of explosion-proof to replace the flame proof design, and any electric spark or any heat effect that this ampere of type explosion-proof produced under the condition (including normal work and the fault condition of regulation) of standard regulation can not ignite the circuit in specified explosive gas environment, is one kind and uses to restrain ignition source energy as the "safety" technique of explosion-proof means. The electric spark or the heat effect that equipment probably produced under normal work or fault condition is required to be less than the minimum energy of igniting and the spontaneous combustion temperature of explosive hazardous gas respectively, and this ampere of type is explosion-proof just can prevent the equipment explosion from the source, consequently need not huge and the very heavy shell of weight of volume to carry out explosion-proof, has improved the security performance of device, and the volume and the weight of device also can reduce by a wide margin simultaneously, have made things convenient for the staff to move the device.

It should be noted that, the present application does not specifically limit the liquid level sensor 34, as long as the liquid level of the oil product in the detection device can be detected, for example: magnetostrictive level gauge, pressure type level sensor, capacitanc level sensor, ultrasonic wave formula level gauge etc. as a preferred of the utility model, the level sensor of this application chooses the magnetostrictive level gauge for use, as shown in figure 1, the projection of the vertical direction of level sensor 34 is located the central point that holds the chamber 3 diapire puts, just the body 341 of level sensor 34 follows along with the liquid level reciprocates in holding the chamber 3 is in order to survey the real-time liquid level of liquid in holding the chamber 3, body 341 on the magnetostrictive level gauge can reciprocate along with the change of oil level height when filling oil into the device to the liquid level of oil in the survey device, the projection of the vertical direction of level sensor 34 is in the central point that holds the chamber 3 diapire simultaneously, even if the device has slight slope when doing the examination, the liquid level that holds the oil central point and puts still keeps original level, the height of the floating body 341 can not be changed, so that the measuring result can not be influenced, the device can measure without leveling, the operation of workers is facilitated, and the requirement on the site during detection is reduced.

Further, the chamber 3 is divided into a first chamber 31 and a second chamber 32, the bottom of the first chamber 31 is communicated with the top center of the second chamber 32 through a pipe 5, the chamber 3 is divided into two chambers, so that when the oil gun is filled with oil into the chamber 3, the second chamber 32 can be filled with oil continuously because the first chamber 31 prevents the excessive oil from overflowing to increase the oil storage capacity of the chamber, and the oil filling pipe is arranged on the first chamber 31, so that the height of the oil filling pipe 2 can be increased, and the oil filling of a worker is facilitated. Preferably, a honeycomb-shaped turbulent layer 501 is further installed in the end of the pipeline 5 to reduce the generation of oil foam and improve the measurement accuracy.

If the level sensor 34 fails due to a circuit failure, further, a scale may be provided between the first and second chambers 31 and 32 to manually read the liquid level in the chamber 3.

The present application does not specifically limit the scale, and the scale may be any one of the following embodiments:

the first implementation mode comprises the following steps: in this embodiment, the oil gun calibrating device is provided with a transparent pipeline communicating the first chamber 31 and the second chamber 32, and a scale parallel to the transparent pipeline is arranged near the transparent pipeline, so as to read the liquid level in the chamber 3.

The second embodiment: in the present embodiment, a transparent window is disposed on the pipeline connecting the first cavity 31 and the second cavity 32, and a vernier caliper is disposed on the transparent window.

The third embodiment is as follows: as a preferred embodiment of the present application, as shown in fig. 1, the oil gun calibrating device is provided with a transparent pipeline 6 communicating the first cavity 31 and the second cavity 32, and a scale for measuring a liquid level in the cavity is arranged on a surface of the transparent pipeline 6. By providing the transparent tube 6 with the scale, the final measurement result can be obtained by manually reading the liquid level even when the liquid level sensor 34 fails, so that a worker does not need to interrupt the calibration due to the failure of the liquid level sensor 34 during the calibration of the oil gun.

In this application, still be provided with cellular buffer layer 201 in the oil pipe 2, the quantitative oiling in-process, the oil from adding oil pipe 2 at first through cellular buffer layer 201, carry out the volatilization and the foam that the turbulent flow caused in order to reduce the direct entering of oil and add oil pipe 2 time striking, effectively avoided the influence of oil gas volatilization and bubble to measuring result, improve equipment's precision.

In this application, the top or/and the lateral wall that hold chamber 3 are provided with transparent window, and are preferred, as shown in fig. 1, be provided with transparent window 311 holding the chamber top, can observe whether oil and oil foam have reached the up end that holds chamber 3 through transparent window 311 when making things convenient for the staff to examine and determine to in time control oil gun velocity of flow, reduce because the oil gun jumps the measuring error that the rifle arouses, the restriction is not done to the material of above-mentioned transparent window 311, it can be glass material, plastic material, resin material etc.. Furthermore, transparent window 311, display module 1 with add oil pipe 2 and be located same one side, through with transparent window 311, display module 1 and add oil pipe 2 setting in the same one side that holds chamber 3, not only make things convenient for the staff to observe the condition of refueling, the staff can also look over real-time data and the final verification result of verification in-process in real time when refueling, make things convenient for staff's operation.

The traditional oil gun calibrating device needs external power supply and needs an extremely long power line to ensure the safety when being electrified, the worker is very troublesome to calibrate or move the calibrating device, meanwhile, when the power supply is connected, electric sparks can be generated at the place where the power supply is plugged, and the surrounding environment such as a gas station and the like is extremely easy to detonate, so that potential safety hazards exist, in the application, the electric energy storage module is arranged on the calibrating device, so that the calibrating device can automatically supply power without an external power supply, an extremely long power line is not needed for supplying power, the operation of workers is facilitated, meanwhile, the hidden troubles of explosion and the like caused by electric sparks possibly generated when an external power supply is used can be avoided, if the electric energy stored in the electric energy storage module is not enough in the using process, the staff can also continue to carry out verification by an external power supply.

In this application, oil gun calibrating installation still include with the wireless module that 4 electricity of data processing module are connected, through set up the wireless module who is connected with 4 electricity of data processing module on oil gun calibrating installation for calibrating installation measuring real-time data and final verification result can both be transmitted to remote equipment such as cell-phone, computer through wireless module, the transmission of information has been made things convenient for, the verification result also can in time be stored on equipment such as cell-phone, computer, the record of data has been made things convenient for, simultaneously the staff can long-range read data, need not to be close to calibrating installation, avoid calibrating installation probably to take place the accident and cause personnel's injury in the verification process, staff's safety has been guaranteed.

As shown in fig. 1, oil gun calibrating installation is still including supporting oil gun calibrating installation's support 7, it is provided with drain 8 to hold the chamber bottom, and this application does not do specifically to the support and restricts, as the utility model discloses a preferred, support 7 with hold the bottom fixed connection of chamber 3, it can be modes such as welding, riveting, threaded connection, does not do the injecing here, and is further, as shown in fig. 1, set up two handles 701 in the relative both sides of support 7, makes things convenient for the staff to move calibrating installation. Further, be provided with leakage fluid dram 8 bottom holding the chamber, after the work of examining and determine is accomplished, make things convenient for the staff to discharge the oil that holds the intracavity, it is preferred, hold the chamber bottom and set up downwardly extending's guide surface, leakage fluid dram 8 is located the lowest position department of guide surface, this application does not do specifically to the guide surface and prescribes a limit to, it can be conical bottom surface, also can be shapes such as arc bottom surface, conveniently hold intracavity oil focus discharge in leakage fluid dram department, and is further, at the external drainage pipe 8 of leakage fluid dram, make things convenient for the oil to discharge into outside receiving device.

Where not mentioned in this application, can be accomplished using or referencing existing technology.

The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. The above description is only an example of the present application and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims (10)

1. An oil gun calibrating device comprises a metering container with a cavity and an oil filling pipe communicated with the cavity, and is characterized in that,

a first temperature sensor for measuring the temperature of liquid in the accommodating cavity and a liquid level sensor for measuring the liquid level of the liquid in the accommodating cavity are arranged in the accommodating cavity, and a second temperature sensor for measuring the outlet temperature of the oil gun is arranged in the oil filling pipe;

oil gun calibrating installation still include with data processing module that first temperature sensor, second temperature sensor and level sensor electricity are connected, with the display module that data processing module electricity is connected, data processing module with display module is fixed in the metering container, display module can show the data and the final verification result of verification in-process.

2. The oil gun calibration device according to claim 1, wherein a vertical projection of the liquid level sensor is located at a center position of the bottom wall of the chamber, and a floating body of the liquid level sensor moves up and down along with the liquid level of the liquid in the chamber to measure the real-time liquid level in the chamber.

3. The oil gun calibration device according to claim 2, wherein the cavity is divided into a first cavity and a second cavity, and the bottom of the first cavity is communicated with the top center of the second cavity through a pipeline.

4. The oil gun calibration device as claimed in claim 3, wherein a transparent pipeline communicating the first cavity and the second cavity is further provided, and a scale for measuring the liquid level in the cavity is arranged on the surface of the transparent pipeline.

5. The oil gun calibration device as claimed in claim 1, wherein a honeycomb-shaped buffer layer is further disposed in the oil filling pipe, and the buffer layer plays roles of guiding and turbulent flow when oil passes through the buffer layer.

6. The oil gun calibration device as claimed in claim 1, wherein a transparent window is provided on the top or/and the side wall of the cavity.

7. The grease gun calibrating device according to claim 6, wherein the transparent window, the display module and the grease filling pipe are located on the same side.

8. The oil gun calibration device according to claim 1, further comprising an electrical energy storage module electrically connected to the data processing module, wherein the electrical energy storage module is capable of supplying power to the oil gun calibration device in a state where the oil gun calibration device is not connected to a power source.

9. The oil gun calibration device as recited in claim 1, further comprising a wireless module electrically connected to the data processing module.

10. The oil gun calibrating device according to any one of claims 1 to 9, further comprising a bracket for supporting the oil gun calibrating device, wherein a drain is disposed at the bottom of the chamber.

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