A liquid level gauge calibration device for liquefied gas tank trucks

Abstract

This invention discloses a calibration device for a liquid level gauge in a liquefied gas tanker truck, relating to the technical field of liquid level gauges for tanker trucks. The calibration device includes a tanker truck body, a liquid level monitoring component, and a calibration component. The liquid level monitoring component is fixedly connected to the side of the tanker truck body, and the calibration component is fixedly connected to the side of the liquid level monitoring component. In the liquid level monitoring component, a pressure-sensitive bulb and a liquid level display element are connected via a connecting pipe. The side of the connecting pipe is equipped with a limiting block, a fixing flange, and a sealing ring, which effectively protects the tanker truck's airtightness. Simultaneously, it promptly feeds back the deformation of the pressure-sensitive bulb caused by changes in internal tank pressure to the reading in the glass liquid column. Using a traditional mechanical structure for liquid level monitoring avoids reading errors caused by electronic component failures. Combined with the reading from the pressure sensor, the two mutually verify each other, eliminating the influence of faults and promptly prompting for liquid level gauge calibration.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of liquid level gauges for automobile tank trucks, in particular to a liquid level gauge calibration device for liquefied gas automobile tank trucks. BACKGROUND

[0002] The height of the liquid medium in the container is called the liquid level, and the instrument for measuring the liquid level is called the liquid level gauge, which is one of the material level gauges. In industrial applications, when measuring the liquid level of some special liquid medium storage tanks or boxes, a non-contact liquid level gauge is usually used to avoid damage to the human body caused by toxic and harmful substances.

[0003] For non-contact liquid level gauges, there is no device for calibrating the instrument. After the related parameters of the instrument are set, the instrument can only be verified by filling and emptying the liquid medium in the tank or box to verify the correctness of the instrument limit value. However, in actual operation, the tank is often not filled with medium, which also leads to the situation that the liquid level gauge is not calibrated for a long time, which may cause errors in the indication of the liquid level gauge used in the tank truck. Therefore, the existing liquid level gauge calibration method has great shortcomings. In order to help solve the above problems, the technical personnel in the field propose a liquid level gauge calibration device for liquefied gas automobile tank trucks. SUMMARY

[0004] (I) Technical problems to be solved

[0005] In view of the deficiencies of the prior art, the present application discloses a liquid level gauge calibration device for liquefied gas automobile tank trucks to solve the problems raised in the background art.

[0006] (II) Technical solutions

[0007] In order to achieve the above purpose, the present application is realized by the following technical solutions: a liquid level gauge calibration device for liquefied gas automobile tank trucks, comprising:

[0008] The tank body of the tank truck is provided with a liquid level monitoring assembly on the side, the liquid level monitoring assembly comprises a pressure-sensitive sphere, a connecting pipe and a liquid level display piece, the pressure-sensitive sphere is arranged on the inner side of the tank body, the connecting pipe is fixedly connected to the side of the pressure-sensitive sphere, and the connecting pipe penetrates through the side wall of the tank body at the end away from the pressure-sensitive sphere and is fixedly connected with the liquid level display piece;

[0009] The calibration assembly is fixedly arranged on the side of the liquid level monitoring assembly, and the calibration assembly comprises a liquid storage tank, a hydraulic oil supplementing piece and a pressure sensing piece, the liquid storage tank is fixedly connected to the side of the tank body, the hydraulic oil supplementing piece is fixedly arranged between the liquid storage tank and the liquid level monitoring assembly, and the pressure sensing piece is arranged on the inner side of the tank body.

[0010] Preferably, the side of the tank body is provided with a mounting hole matched with the liquid level monitoring assembly, and the side of the tank body is fixedly connected with a mounting seat matched with the verification assembly.

[0011] Preferably, the connecting pipe penetrates the side wall of the pressure sensing ball and is fixedly connected therewith, the side of the connecting pipe is fixedly connected with a limiting block matched with the mounting hole, and the side of the connecting pipe is slidably sleeved with a fixing flange matched with the limiting block.

[0012] Preferably, the liquid level display piece comprises a supporting plate, a glass liquid column and a marking plate, the supporting plate is fixedly connected at the end of the connecting pipe away from the pressure sensing ball, the upper surface of the supporting plate is fixedly connected with the glass liquid column, and the inner side of the glass liquid column is fixedly provided with the marking plate.

[0013] Preferably, the upper surface of the supporting plate is provided with an overflow hole, the top end of the glass liquid column is fixedly provided with a solution ball, and the side of the glass liquid column is provided with a clamping block matched with the marking plate.

[0014] Preferably, the hydraulic oil supplementing piece comprises a liquid supplementing pipeline, a liquid supplementing pump and a throttle valve, the liquid supplementing pipeline is fixedly connected between the liquid storage tank and the connecting pipe, the inner side of the liquid supplementing pipeline is fixedly provided with the liquid supplementing pump, and the liquid supplementing pipeline and the liquid storage tank are fixedly provided with the throttle valve.

[0015] Preferably, the pressure sensing piece comprises a display screen, a pressure sensor and a signal processing hub, the display screen is fixedly connected to the side of the liquid storage tank, the inner side of the tank body is provided with the pressure sensor, and the display screen and the pressure sensor are provided with the signal processing hub.

[0016] Preferably, the display screen and the pressure sensor are fixedly connected with a data transmission line, the side of the data transmission line is provided with a sealing ring, and the sealing ring is also arranged on the side of the limiting block close to the fixing flange.

[0017] The application discloses a liquid level gauge verification device for liquefied gas automobile tank cars.

[0018] 1. The liquid level gauge calibration device for liquefied gas tank truck, a liquid level gauge composed of pressure reading and glass tube reading is designed, and in use, the pressure sensor reading and the display reading of the glass liquid column can be compared, and with the injection of medium into the tank body, the internal pressure of the tank body increases, the pressure sensing ball body is pressed to inject the internal hydraulic oil into the glass liquid column, so that the amount of medium in the tank body can be directly observed, and with the injection of medium, the pressure sensor located in the tank body simultaneously senses the change of internal pressure, and the signal processing hub processes the numerical change and feeds back the numerical value to the display screen, and the liquid level readings of the two can be compared to more accurately read the amount of medium in the tank body, and when there is an error in the readings of the two, the calibration of the liquid level gauge is prompted, and the hydraulic oil is supplemented or extracted to the liquid level monitoring assembly through the calibration assembly.

[0019] 2. The liquid level gauge calibration device for liquefied gas tank truck, the pressure sensing ball body and the liquid level display piece in the liquid level monitoring assembly are connected inside and outside through the connecting pipe, and the side of the connecting pipe is provided with a limiting block, a fixed flange and a sealing ring for limiting, fixing and sealing, which can well protect the sealing of the tank body, and at the same time, the deformation of the pressure sensing ball body caused by the change of the internal pressure of the tank body is fed back to the reading in the glass liquid column, the liquid level monitoring is carried out by using the traditional mechanical structure, which can avoid the reading error caused by the failure of electronic elements, and combined with the reading of the pressure sensor, the influence caused by the failure can be excluded through mutual verification, and the calibration of the liquid level gauge is prompted in time.

[0020] 3. The liquid level gauge calibration device for liquefied gas tank truck, the hydraulic oil in the pressure sensing ball body in the liquid level monitoring assembly enters the glass liquid column through the overflow hole under the action of pressure, and then the amount of medium in the tank body is monitored through the height of the hydraulic oil in the glass liquid column, and the diameter of the overflow hole and the space in the glass liquid column is proportional to the volume change amount of the pressure sensing ball body caused by the amount of medium in the tank body, so that the real-time monitoring of the amount of medium in the liquid tank body is realized, and the calibration assembly is connected on the side of the liquid level monitoring assembly, which can calibrate the liquid level monitoring assembly by changing the actual amount of hydraulic oil in the liquid level monitoring assembly, this way is not limited to emptying or filling the medium in the tank body to calibrate, but can calibrate according to the pressure sensor monitoring data displayed on the display screen, and the two liquid level gauges can verify each other, so that the calibration of the liquid level gauge can be found and carried out in time, and the problem of abnormal medium injection caused by the failure of the liquid level gauge can be prevented.

[0021] 4. The liquid level gauge calibration device for liquefied gas tank truck, the pressure sensing piece in the device senses the change of the internal pressure of the tank body through the pressure sensor, and transmits the change to the signal processing hub through the data transmission line for processing, and the electric signal strength involved in the process is low, which is not enough to cause explosion danger to the transported medium, and the amount of medium in the tank body is accurately identified while the transportation safety is ensured.

[0022] 5. The liquid level gauge calibration device for liquefied gas tank truck, the liquid storage tank and the liquid level monitoring assembly are provided with a liquid supplement pump for bidirectional adjustment of the amount of hydraulic oil, and a throttle valve is arranged in the liquid supplement pipeline, so that the sealing property of the hydraulic oil supplement part is improved, the problem of inaccurate reading of the liquid level gauge caused by excessive pressure in the liquid level monitoring assembly affecting the liquid supplement pump and leading to backflow of the hydraulic oil into the liquid storage tank is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the present application.

[0024] Figure 2 It is a schematic diagram of the structure of the liquid level monitoring assembly of the present application.

[0025] Figure 3 It is a schematic diagram of the structure of the liquid level monitoring assembly of the present application. Figure 2 It is an enlarged schematic diagram of the structure at A in the present application.

[0026] Figure 4 It is a sectional view of the overall structure of the present application.

[0027] Figure 5 It is an enlarged schematic diagram of the structure at B in the present application. Figure 4 It is an enlarged schematic diagram of the structure at B in the present application.

[0028] Figure 6 It is a schematic diagram of the structure of the hydraulic oil supplement part of the present application.

[0029] Figure 7 It is a schematic diagram of the structure of the pressure sensing part of the present application.

[0030] In the figure: 1, tank body; 2, liquid level monitoring assembly; 201, pressure sensing ball; 202, connecting pipe; 203, liquid level display part; 2031, supporting plate; 2032, glass liquid column; 2033, marking plate; 3, calibration assembly; 301, liquid storage tank; 302, hydraulic oil supplement part; 3021, liquid supplement pipeline; 3022, liquid supplement pump; 3023, throttle valve; 303, pressure sensing part; 3031, display screen; 3032, pressure sensor; 3033, signal processing hub; 4, mounting hole; 5, mounting seat; 6, limiting block; 7, fixing flange; 8, overflow hole; 9, solution ball; 10, clamping block; 11, data transmission line; 12, sealing ring. DETAILED DESCRIPTION

[0031] The present application discloses a liquid level gauge calibration device for liquefied gas tank truck, as shown in the figure, comprising a tank body 1, a liquid level monitoring assembly 2 and a calibration assembly 3, the side of the tank body 1 is fixedly connected with the liquid level monitoring assembly 2, and the side of the liquid level monitoring assembly 2 is fixedly connected with the calibration assembly 3. Figure 1

[0032] ​The tank body 1 is installed on the conveying vehicle, needs to be equipped with the anti-static grounding strip ground, prevents the medium transportation from generating a large amount of static electricity and explodes the tank body 1, the liquid level monitoring assembly 2 is fixedly connected to the side of the tank body 1, and can be used only after being adjusted according to the actual volume of the tank body 1, the calibration assembly 3 is fixedly connected to the side of the tank body 1, and the calibration assembly 3 is connected with the liquid level monitoring assembly 2 and the tank body 1 respectively, and when the error of the liquid level monitoring assembly 2 is monitored, the calibration assembly 3 is used for calibrating the liquid level monitoring assembly 2 in time.

[0033] As shown in Figure 2 The liquid level monitoring assembly 2 comprises a pressure sensing sphere 201, a connecting pipe 202 and a liquid level display piece 203, the pressure sensing sphere 201 is arranged on the inner side of the tank body 1, the connecting pipe 202 is fixedly connected to the side of the pressure sensing sphere 201, and the end, away from the pressure sensing sphere 201, of the connecting pipe 202 penetrates through the side wall of the tank body 1 and is fixedly connected with the liquid level display piece 203.

[0034] The pressure sensing sphere 201 is arranged in a spherical structure, so that the side wall of the pressure sensing sphere 201 can conveniently receive the pressure change in the tank body 1, the connecting pipe 202 penetrates through the pressure sensing sphere 201, and under the action of pressure, the pressure sensing sphere 201 deforms, so that the hydraulic oil in the pressure sensing sphere 201 can be guided out of the connecting pipe 202, and the hydraulic oil guided out enters the liquid level display piece 203, so that the volume of the medium in the tank body 1 can be monitored through the change of the height of the hydraulic oil in the liquid level display piece 203.

[0035] As shown in Figure 3 The side of the tank body 1 is provided with a mounting hole 4 matched with the liquid level monitoring assembly 2, the connecting pipe 202 penetrates through the side wall of the pressure sensing sphere 201 and is fixedly connected with the pressure sensing sphere 201, the side of the connecting pipe 202 is fixedly connected with a limiting block 6 matched with the mounting hole 4, the side of the connecting pipe 202 is slidably sleeved with a fixing flange 7 matched with the limiting block 6, and a sealing ring 12 is arranged on the side, close to the fixing flange 7, of the limiting block 6.

[0036] When the liquid level monitoring assembly 2 is installed, the connecting pipe 202 connected with the pressure sensing sphere 201 is penetrated out of the inner side of the tank body 1 until the limiting block 6 abuts against the inner wall of the tank body 1, and the fixing flange 7 is connected with the limiting block 6 through a bolt, and the mounting hole 4 can be sealed while the bolt is fastened, so that the tank body 1 is prevented from leaking.

[0037] As shown in Figures 4-5 The liquid level display piece 203 comprises a supporting plate 2031, a glass liquid column 2032 and a mark plate 2033, the supporting plate 2031 is fixedly connected to the end, away from the pressure sensing sphere 201, of the connecting pipe 202, the upper surface of the supporting plate 2031 is fixedly connected with the glass liquid column 2032, and the inner side of the glass liquid column 2032 is fixedly provided with the mark plate 2033.

[0038] The upper surface of the support plate 2031 is provided with an overflow hole 8, the top end of the glass liquid column 2032 is fixedly provided with a solution ball 9, and the side surface of the glass liquid column 2032 is provided with a clamping block 10 matched with the marker plate 2033.

[0039] The solution ball 9 can prevent the hydraulic oil from being filled into the glass liquid column 2032, the marker plate 2033 is clamped on one side of the glass liquid column 2032 through the clamping block 10 and closely adheres to the glass liquid column 2032, and the reading of the glass liquid column 2032 is more convenient, and the marker plates 2033 with different intervals can be used according to the actual tank body 1.

[0040] In combination Figure 6 As shown, the checking assembly 3 is fixedly arranged on the side of the liquid level monitoring assembly 2, the checking assembly 3 includes a liquid storage tank 301, a hydraulic oil supplement 302 and a pressure sensing part 303, the liquid storage tank 301 is fixedly connected to the side of the tank body 1, the hydraulic oil supplement 302 is fixedly arranged between the liquid storage tank 301 and the liquid level monitoring assembly 2, and the pressure sensing part 303 is arranged on the inner side of the tank body 1.

[0041] The side of the tank body 1 is fixedly connected with a mounting seat 5 matched with the checking assembly 3, the hydraulic oil supplement 302 includes a liquid supplement pipeline 3021, a liquid supplement pump 3022 and a throttle valve 3023, the liquid supplement pipeline 3021 is fixedly connected between the liquid storage tank 301 and the connecting pipe 202, the inner side of the liquid supplement pipeline 3021 is fixedly provided with the liquid supplement pump 3022, and the liquid supplement pipeline 3021 is fixedly provided with the throttle valve 3023 between the liquid storage tank 301.

[0042] The mounting seat 5 matched with the liquid storage tank 301 is arranged on the side of the tank body 1, which can prevent the tank body 1 from being damaged during the installation of the liquid storage tank 301, and the pressure sensor 3032 is arranged on the inner side of the tank body 1, which can monitor the pressure change in the tank body 1 in real time, so as to calculate the amount of medium in the tank body 1 according to the monitoring value and display the feedback value as a digital value.

[0043] When there is a difference between the values observed from the pressure sensing part 303 and the liquid level display part 203, the checking work of the liquid level monitoring assembly 2 should be carried out in time to prevent the danger caused by the overfilling of the medium due to the error of the liquid level monitoring assembly 2.

[0044] The hydraulic oil supplement 302 is provided with the throttle valve 3023 and the liquid supplement pump 3022 for double restriction, which can avoid the overpressure in the liquid level monitoring assembly 2 from breaking the liquid supplement pump 3022 and entering the liquid storage tank 301.

[0045] In combination Figure 7As shown, the pressure sensing piece 303 includes a display screen 3031, a pressure sensor 3032 and a signal processing hub 3033, the display screen 3031 is fixedly connected to the side of the liquid storage tank 301, the inner side of the tank body 1 is provided with the pressure sensor 3032, and the signal processing hub 3033 is arranged between the display screen 3031 and the pressure sensor 3032.

[0046] The data transmission line 11 is fixedly connected between the display screen 3031 and the pressure sensor 3032, and the side of the data transmission line 11 is provided with a sealing ring 12.

[0047] Working principle: the liquid level gauge calibration device for liquefied gas automobile tank cars in actual use, a kind of liquid level monitoring device composed of pressure sensor 3032 reading and glass liquid column 2032 reading two ways of liquid level gauge, in use, can be compared with the reading obtained by the pressure sensor 3032 sensing pressure change and the display reading of the glass liquid column 2032, with the increase of the volume of the medium in the tank body 1, the pressure in the tank body 1 increases, the pressure sensing ball 201 is pressed to inject the hydraulic oil in the tank body 1 into the glass liquid column 2032, so that the amount of medium in the tank body 1 can be directly observed, the pressure sensor 3032 in the tank body 1 simultaneously senses the pressure change in the tank body 1, and the signal processing hub 3033 processes the numerical change to feedback the numerical display of the display screen 3031, the liquid level readings of the two can be more accurately read out the amount of medium in the tank body 1, when the readings of the two are wrong, the calibration of the liquid level gauge is prompted, and the calibration assembly 3 is used to supplement or extract hydraulic oil to the liquid level monitoring assembly 2 for calibration.

[0048] The pressure sensing ball 201 and the liquid level display piece 203 in the liquid level monitoring assembly 2 are connected through the connecting pipe 202, the side of the connecting pipe 202 is provided with a limiting block 6 for limiting and fixing and sealing, a fixed flange 7 and a sealing ring 12, with the limiting block 6 and the fixed flange 7 fixed by bolts approaching each other, the sealing ring 12 seals the mounting hole 4, which can well protect the sealing of the tank.

[0049] At the same time, the deformation of the pressure sensing ball 201 caused by the pressure change in the tank body 1 is fed back to the reading in the glass liquid column 2032, the traditional mechanical structure is used for liquid level monitoring, which can avoid the reading error caused by electronic element failure, combined with the reading of the pressure sensor 3032, the influence of failure can be excluded by mutual verification, and the calibration of the liquid level gauge is prompted in time.

[0050] The hydraulic oil in the pressure sensing ball 201 of the liquid level monitoring assembly 2 enters the glass liquid column 2032 through the overflow hole 8 under the action of pressure, and then the quantity of the medium in the tank 1 is monitored by the height of the hydraulic oil in the glass liquid column 2032. The diameter of the space in the overflow hole 8 and the glass liquid column 2032 is proportional to the volume change of the pressure sensing ball 201 caused by the quantity of the medium in the tank 1, thereby realizing real-time monitoring of the quantity of the liquefied gas in the tank 1. The side of the liquid level monitoring assembly 2 is connected with the verification assembly 3, which can verify the liquid level monitoring assembly 2 by changing the actual quantity of the hydraulic oil in the liquid level monitoring assembly 2. This method is not limited to verifying by emptying or filling the medium in the tank 1, but can be verified according to the monitoring data of the pressure sensor 3032 displayed on the display screen 3031, and the two liquid level meters can verify each other to find and verify the liquid level meter in time, which can prevent the problem of abnormal medium injection caused by the failure of the liquid level meter.

[0051] In addition, the pressure sensing part 303 in the device senses the pressure change in the tank 1 through the pressure sensor 3032, and transmits the change to the signal processing hub 3033 through the data transmission line 11 for processing. The electrical signal strength involved in the process is low and is not enough to pose an explosion hazard to the transported medium. While accurately identifying the quantity of the medium in the tank 1, the safety of transportation is ensured.

[0052] The liquid storage tank 301 and the liquid level monitoring assembly 2 are not only provided with a liquid supplementing pump 3022 for bidirectional adjustment of the quantity of hydraulic oil, but also provided with a throttle valve 3023 in the liquid supplementing pipeline 3021. In use, the sealing property of the hydraulic oil supplementing part 302 can be increased to avoid the problem of inaccurate reading of the liquid level meter caused by the backflow of hydraulic oil into the liquid storage tank 301 due to the excessive pressure in the liquid level monitoring assembly 2 affecting the operation of the liquid supplementing pump 3022.

[0053] Embodiment 1: A liquid level meter verification device for liquefied gas automobile tank cars, comprising:

[0054] The tank 1 is fixedly provided with a liquid level monitoring assembly 2 on the side thereof, and the liquid level monitoring assembly 2 comprises a pressure sensing ball 201, a connecting pipe 202 and a liquid level display part 203. The pressure sensing ball 201 is arranged on the inner side of the tank 1, and the connecting pipe 202 is fixedly connected to the side of the pressure sensing ball 201. The end of the connecting pipe 202 away from the pressure sensing ball 201 penetrates through the side wall of the tank 1 and is fixedly connected with the liquid level display part 203.

[0055] The verification assembly 3 is fixedly arranged on the side of the liquid level monitoring assembly 2.

[0056] The side of the tank 1 is provided with a mounting hole 4 matched with the liquid level monitoring assembly 2, and the side of the tank 1 is fixedly connected with a mounting seat 5 matched with the verification assembly 3.

[0057] The connecting pipe 202 penetrates the side wall of the pressure ball 201 and is fixedly connected therewith. The side surface of the connecting pipe 202 is fixedly connected with a limiting block 6 matched with the mounting hole 4. The side surface of the connecting pipe 202 is slidingly sleeved with a fixed flange 7 matched with the limiting block 6.

[0058] The liquid level display piece 203 comprises a supporting plate 2031, a glass liquid column 2032 and a mark plate 2033. The supporting plate 2031 is fixedly connected at the end of the connecting pipe 202 away from the pressure ball 201. The upper surface of the supporting plate 2031 is fixedly connected with the glass liquid column 2032. The inner side of the glass liquid column 2032 is fixedly provided with the mark plate 2033.

[0059] The upper surface of the supporting plate 2031 is provided with an overflow hole 8. The top end of the glass liquid column 2032 is fixedly provided with a solution ball 9. The side surface of the glass liquid column 2032 is provided with a clamping block 10 matched with the mark plate 2033.

[0060] In the embodiment, the pressure ball 201 and the liquid level display piece 203 in the liquid level monitoring assembly 2 are connected through the connecting pipe 202, thereby penetrating the internal and external pressure difference of the tank body 1.

[0061] The tank body 1 is installed on a conveying vehicle and needs to be equipped with an anti-static grounding belt to prevent a large amount of static electricity generated during medium transportation from exploding the tank body 1. The liquid level monitoring assembly 2 is fixedly connected to the side surface of the tank body 1 and can be used only after being adjusted according to the actual volume of the tank body 1. The calibration assembly 3 is fixedly connected to the side surface of the tank body 1 and is correspondingly connected with the liquid level monitoring assembly 2 and the tank body 1. When an error of the liquid level monitoring assembly 2 is monitored, the calibration assembly 3 can calibrate the error in time.

[0062] The pressure ball 201 is provided in a spherical structure, which facilitates the side wall to receive the pressure change in the tank body 1. The connecting pipe 202 penetrates the pressure ball 201. Under the action of pressure, the pressure ball 201 deforms, and the hydraulic oil in the pressure ball 201 can be guided out of the connecting pipe 202. The guided-out hydraulic oil enters the liquid level display piece 203, so that the volume of the medium in the tank body 1 can be monitored through the change of the height of the hydraulic oil in the liquid level display piece 203.

[0063] The side surface of the connecting pipe 202 is provided with the limiting block 6 for limiting fixation, the fixed flange 7 and the sealing ring 12 for sealing. With the mutual approach between the limiting block 6 and the fixed flange 7 fixed by the bolt, the sealing ring 12 is extruded and sealed to the mounting hole 4, which can well protect the sealing property of the tank body.

[0064] The liquid level monitoring assembly 2 of the mechanical structure can timely feed back the deformation of the pressure-sensitive sphere 201 caused by the change of the internal pressure of the tank 1 to the reading in the glass liquid column 2032. The liquid level monitoring is performed by using the traditional mechanical structure, which can avoid the reading error caused by the failure of the electronic element. Compared with the electronic liquid level meter, the use effect is stronger as long as the verification is correct.

[0065] The hydraulic oil in the pressure-sensitive sphere 201 in the liquid level monitoring assembly 2 enters the glass liquid column 2032 through the overflow hole 8 provided on the supporting plate 2031 under the action of pressure, and then the height of the hydraulic oil in the glass liquid column 2032 is used for monitoring the medium in the tank 1. The height of the hydraulic oil in the glass liquid column 2032 is proportional to the pressure on the surface of the pressure-sensitive sphere 201 in the tank 1, and the two are mutually penetrating and related, without time error, which is beneficial to the verification process of the increase and decrease of the hydraulic oil. The diameter of the overflow hole 8 and the space in the glass liquid column 2032 is proportional to the volume change of the pressure-sensitive sphere 201 caused by the amount of medium in the tank 1, thereby realizing real-time monitoring of the amount of medium in the tank 1.

[0066] The verification assembly 3 connected to the side of the liquid level monitoring assembly 2 can verify the liquid level monitoring assembly 2 by changing the actual amount of hydraulic oil in the liquid level monitoring assembly 2. This method is not limited to emptying or filling the medium in the tank 1 for verification, but can be verified according to the monitoring data displayed on the verification assembly 3. The two liquid level meters are verified with each other, which can timely find and perform the verification of the liquid level meter, and can prevent the problem of abnormal medium injection amount caused by the failure of the liquid level meter.

[0067] Embodiment 2: A liquid level meter verification device for liquefied gas automobile tank car, comprising:

[0068] The tank 1 is fixedly provided with a liquid level monitoring assembly 2 on the side thereof;

[0069] The verification assembly 3 is fixedly provided on the side of the liquid level monitoring assembly 2, and the verification assembly 3 comprises a liquid storage tank 301, a hydraulic oil supplement 302 and a pressure sensing part 303. The liquid storage tank 301 is fixedly connected to the side of the tank 1, the hydraulic oil supplement 302 is fixedly arranged between the liquid storage tank 301 and the liquid level monitoring assembly 2, and the pressure sensing part 303 is arranged on the inner side of the tank 1.

[0070] The hydraulic oil supplement 302 comprises a liquid supplement pipeline 3021, a liquid supplement pump 3022 and a throttle valve 3023. The liquid supplement pipeline 3021 is fixedly connected between the liquid storage tank 301 and the connecting pipe 202, the liquid supplement pump 3022 is fixedly arranged on the inner side of the liquid supplement pipeline 3021, and the throttle valve 3023 is fixedly arranged between the liquid supplement pipeline 3021 and the liquid storage tank 301.

[0071] The pressure sensor 3032 is arranged on the inner side of the tank body 1, and the signal processing hub 3033 is arranged between the display screen 3031 and the pressure sensor 3032.

[0072] The data transmission line 11 is fixedly connected between the display screen 3031 and the pressure sensor 3032, and the sealing ring 12 is arranged on the side of the data transmission line 11.

[0073] In the embodiment, a liquid level monitoring device composed of a liquid level gauge with two reading modes of the pressure sensor 3032 and the glass liquid column 2032 is designed. In use, the reading obtained by the pressure sensor 3032 sensing the pressure change and the display reading of the glass liquid column 2032 can be compared. With the increase of the volume of the medium in the tank body 1, the internal pressure of the tank body 1 increases, and the pressure-sensitive ball body 201 injects the internal hydraulic oil into the glass liquid column 2032 under pressure, so that the amount of medium in the tank body 1 can be directly observed. The pressure sensor 3032 in the tank body 1 simultaneously senses the change of the internal pressure of the tank body 1, and the signal processing hub 3033 processes the numerical change and feeds it back to the numerical display of the display screen 3031. The comparison of the liquid level readings of the two can more accurately read the amount of medium in the tank body 1. When there is an error in the readings of the two, the verification of the liquid level gauge is prompted, and the verification assembly 3 supplements or extracts hydraulic oil to the liquid level monitoring assembly 2 for verification.

[0074] The pressure sensor 3032 senses the change of the pressure due to the filling of the medium in the tank body 1, and transmits the change value to the signal processing hub 3033 through a safe voltage. The signal processing hub 3033 imports the change of the pressure into a formula to obtain the amount of the filled medium, converts the volume of the tank body 1, obtains the liquid level height of the tank body 1, and displays it in numerical form on the display screen 3031. At the same time, the pressure-sensitive ball body 201 in the liquid level monitoring assembly 2 also deforms due to the change of the internal pressure of the tank body 1, and squeezes the internal hydraulic oil into the glass liquid column 2032, which is manifested as the change of the hydraulic oil height in the glass liquid column 2032. The two are mutually verified, and if there is an error between the two, the use of the device needs to be stopped in time and verified.

[0075] The verification method is also very convenient, that is, a proper amount of medium is filled into the tank body 1, and the display change of the display screen 3031 and the change value of the hydraulic oil height in the glass liquid column 2032 are observed at the same time, the error is verified, and then the hydraulic oil is filled into the connecting pipe 202 to the appropriate position through the verification assembly 3, and the above steps are repeated for multiple times until the two numerical values change synchronously, that is, the verification process of the device is completed. The tank body 1 does not need to be emptied or filled, which can avoid the trouble and loss caused by the original verification method.

[0076] The pressure sensing element 303 in the device senses the pressure change in the tank 1 through the pressure sensor 3032, and transmits the change to the signal processing hub 3033 through the data transmission line 11 for processing. The electrical signal strength involved in the process is low, which is not enough to pose an explosion hazard to the transported medium, and ensures the safety of transportation while accurately identifying the amount of medium in the tank 1.

[0077] The liquid storage tank 301 and the liquid level monitoring assembly 2 are not only provided with a liquid supplement pump 3022 for bidirectional adjustment of the amount of hydraulic oil, but also provided with a throttle valve 3023 in the liquid supplement pipeline 3021. In use, the sealing property of the hydraulic oil supplement 302 can be increased to avoid the problem of inaccurate reading of the liquid level meter caused by the backflow of hydraulic oil into the liquid storage tank 301 due to the excessive pressure in the liquid level monitoring assembly 2 affecting the operation of the liquid supplement pump 3022.

[0078] The above shows and describes the basic principles and main features of the present application and the advantages of the present application. Those skilled in the art should understand that the present application is not limited to the above embodiments, and the above embodiments and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A liquid level gauge calibration device for a liquefied gas tank truck, characterized by, The utility model relates to a liquid level monitoring device for tank, which comprises a tank (1), a liquid level monitoring assembly (2) fixedly arranged on the side of the tank (1), a check assembly (3) fixedly arranged on the side of the liquid level monitoring assembly (2), and a mounting hole (4) and a mounting seat (5) formed on the side of the tank (1). The liquid level monitoring assembly (2) comprises a pressure-sensitive ball (201), a connecting pipe (202) and a liquid level display (203), the pressure-sensitive ball (201) is arranged on the inner side of the tank (1), the connecting pipe (202) is fixedly connected to the side of the pressure-sensitive ball (201), and the connecting pipe (202) penetrates through the side wall of the tank (1) and is fixedly connected with the liquid level display (203) at the end away from the pressure-sensitive ball (201). The check assembly (3) comprises a liquid storage tank (301), a hydraulic oil supplement (302) and a pressure sensing element (303), the liquid storage tank (301) is fixedly connected to the side of the tank (1), the hydraulic oil supplement (302) is fixedly arranged between the liquid storage tank (301) and the liquid level monitoring assembly (2), and the pressure sensing element (303) is arranged on the inner side of the tank (1). The hydraulic oil supplement (302) comprises a liquid supplement pipeline (3021), a liquid supplement pump (3022) and a throttle valve (3023), the liquid supplement pipeline (3021) is fixedly connected between the liquid storage tank (301) and the connecting pipe (202), the liquid supplement pump (3022) is fixedly arranged on the inner side of the liquid supplement pipeline (3021), and the throttle valve (3023) is fixedly arranged between the liquid supplement pipeline (3021) and the liquid storage tank (301).

2. The liquid level gauge calibration device for liquefied gas tank truck according to claim 1, characterized in that: The side of the tank (1) is provided with the mounting hole (4) matched with the liquid level monitoring assembly (2), and the side of the tank (1) is fixedly connected with the mounting seat (5) matched with the check assembly (3).

3. The liquid level gauge calibration device for liquefied gas tank truck according to claim 1, characterized in that: The connecting pipe (202) penetrates through the side wall of the pressure-sensitive ball (201) and is fixedly connected thereto, the side of the connecting pipe (202) is fixedly connected with the limiting block (6) matched with the mounting hole (4), and the side of the connecting pipe (202) is slidably sleeved with the fixing flange (7) matched with the limiting block (6).

4. The liquid level gauge calibration device for liquefied gas tank truck according to claim 1, characterized in that: The liquid level display (203) comprises a supporting plate (2031), a glass liquid column (2032) and a marking plate (2033), the supporting plate (2031) is fixedly connected to the end of the connecting pipe (202) away from the pressure-sensitive ball (201), the upper surface of the supporting plate (2031) is fixedly connected with the glass liquid column (2032), and the inner side of the glass liquid column (2032) is fixedly provided with the marking plate (2033).

5. A liquid level gauge calibration device for a liquefied gas road tanker according to claim 4, characterised in that: The upper surface of the supporting plate (2031) is provided with the overflow hole (8), the top end of the glass liquid column (2032) is fixedly provided with the solution ball (9), and the side of the glass liquid column (2032) is provided with the clamping block (10) matched with the marking plate (2033).

6. The liquid level gauge calibration device for a liquefied gas tank truck according to claim 1, characterized in that: The pressure sensing piece (303) comprises a display screen (3031), a pressure sensor (3032) and a signal processing hub (3033), the display screen (3031) is fixedly connected to the side of the liquid storage tank (301), the inner side of the tank body (1) is provided with the pressure sensor (3032), and the display screen (3031) and the pressure sensor (3032) are provided with the signal processing hub (3033).

7. A liquid level gauge calibration device for a liquefied gas road tanker according to claim 6, characterised in that: The display screen (3031) and the pressure sensor (3032) are fixedly connected with a data transmission line (11), one side of the data transmission line (11) is provided with a sealing ring (12), and the sealing ring (12) is also arranged on one side of the limiting block (6) close to the fixing flange (7).

Images