CN111076857A - Tank body pressure distribution test method of tank car and tank body internal pressure test device - Google Patents
Tank body pressure distribution test method of tank car and tank body internal pressure test device Download PDFInfo
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- CN111076857A CN111076857A CN201811218004.1A CN201811218004A CN111076857A CN 111076857 A CN111076857 A CN 111076857A CN 201811218004 A CN201811218004 A CN 201811218004A CN 111076857 A CN111076857 A CN 111076857A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L11/00—Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by means not provided for in group G01L7/00 or G01L9/00
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
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- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The invention relates to the technical field of special vehicles, and particularly provides a tank pressure distribution test method and a tank internal pressure test device of a tank car. The test method comprises the following steps: 1) a sampling area is arranged in the tank body, a pressure sensing device for acquiring pressure data is fixed in the sampling area, and a data acquisition device in signal connection with the pressure sensing device is arranged for acquiring the pressure data; 2) and injecting liquid into the tank body to immerse each pressure sensing device into the liquid, starting the tank car to drive the tank body to move, and obtaining and processing test data. The pressure distribution of the seal head is obtained in a real test environment, the accuracy of test data can be improved, technicians are helped to master the pressure distribution received in the tank body when the vehicle runs, effective data support is provided for the structural design of the tank body later, and great help is provided for improving the safety of the whole vehicle.
Description
Technical Field
The invention relates to the technical field of special vehicles, in particular to a tank pressure distribution test method of a tank car and a tank internal pressure test device.
Background
The tank body is used for storing water, oil or other liquid materials and comprises a cylinder structure serving as a main body and a sealing head for plugging an opening of the cylinder structure, and the sealing head is matched with the cylinder to form a complete storage space.
Taking a washing and sweeping vehicle as an example, when the washing and sweeping vehicle works, the weight of water stored in the tank body accounts for about 40% of the weight of the whole vehicle under the condition that the tank body is fully loaded, and in the form process of the washing and sweeping vehicle, the water in the tank body collides with the inner wall of the tank body under the action of inertia, so that the tank body and even the vehicle vibrate, and the condition is more obvious under the working conditions of emergency braking, emergency acceleration and the like of the vehicle. When the natural frequency of the water sloshing in the tank body is close to the pitching frequency of the washing and sweeping vehicle, the water sloshing and pitching motion resonate, so that great sloshing impact is generated on the inner wall of the tank body, and the connection strength between the components in the tank body and the connection strength between the tank body and the vehicle are affected. When the tank body shakes, a large shaking moment can be generated on the vehicle, so that the balance of the vehicle during running is affected, and the running safety is reduced.
In the running process of a vehicle, the end socket of the tank body is a main stressed part, so that the stress form of the end socket under different running conditions of the vehicle is judged, and the method has important significance for improving the safety of the whole vehicle and optimizing the structure of the tank body.
Disclosure of Invention
The invention aims to provide a tank body pressure distribution test method of a tank car, which can solve the problems that in the prior art, the pressure distribution at a seal head can be judged only by experience, and no scientific and effective method is available for providing corresponding data; the invention also aims to provide a tank internal pressure test device which can effectively test the pressure inside the tank.
In order to achieve the purpose, the tank body pressure distribution test method of the tank car adopts the following technical scheme:
the tank body pressure distribution test method of the tank car comprises the following steps: 1) a sampling area is arranged in the tank body, a pressure sensing device for acquiring pressure data is fixed in the sampling area, and a data acquisition device in signal connection with the pressure sensing device is arranged for acquiring the pressure data; 2) and injecting liquid into the tank body to immerse each pressure sensing device into the liquid, starting the tank car to drive the tank body to move, and obtaining and processing test data.
The beneficial effects are that: the pressure distribution in the tank body is obtained in a test environment of real driving, so that the accuracy of test data can be improved, technicians are helped to master the pressure distribution on the seal head when the vehicle is driven in a real state, effective data support is provided for the structural design of the tank body later, and great help is provided for improving the safety of the whole vehicle; and a plurality of sampling areas are arranged in the test device, so that the test efficiency can be improved, the error of test data can be reduced, the whole test process is simple to operate, and the consistency of the test data is good.
Further, when setting up the sample area, each sample area head-to-tail in the direction of height of jar body.
The beneficial effects are that: set up the sample area along the direction of height of the jar body, can carry out comprehensive test to the water pressure in the jar body.
In order to achieve the purpose, the pressure test device in the tank body adopts the following technical scheme:
the pressure intensity test device in the tank body comprises a pressure sensing device and a data acquisition device, wherein the pressure sensing device is used for being fixed in the tank body, the data acquisition device is in signal connection with the pressure sensing device and is used for acquiring pressure data, the pressure sensing device comprises a bearing plate and a fixed plate, the bearing plate is used for bearing liquid pressure, the fixed plate is used for being fixed with the inner wall of the tank body, at least two pressure sensors are arranged in the interval between the bearing plate and the fixed plate, and two ends of each pressure sensor are respectively fixedly connected with the bearing plate and the fixed plate.
The beneficial effects are that: the pressure sensor as the detection unit is provided with the bearing plate, the bearing plate can transmit pressure to the pressure sensor, the pressure sensor is combined with the bearing plate, the bearing plate can transmit the pressure to the pressure sensor, test efficiency can be improved, accuracy of test data can be improved, and test errors are reduced.
At pressure sensor's the other end, be provided with the fixed plate, the fixed plate is fixed a plurality of pressure sensor, can be with a plurality of pressure sensor an organic whole sets up on the sealing head again through the fixed plate, has improved assembly efficiency
Furthermore, the bearing plate is square, and the pressure sensor is arranged at the corner of the bearing plate.
The beneficial effects are that: the pressure sensor is arranged at the corner of the bearing plate, so that the data accuracy rate detected by the pressure sensor is higher.
Furthermore, the fixed plate is fixed on the inner wall of the tank body through bonding.
The beneficial effects are that: the fixing plate is fixed on the inner wall of the tank body in a bonding mode, so that the operation mode is simple and convenient to realize.
Drawings
FIG. 1 is a schematic structural diagram of a can body to be inspected in the present invention;
FIG. 2 is a schematic view of the arrangement of a sampling region at the end socket of the tank body in the invention;
fig. 3 is a schematic structural diagram of the pressure sensing device of the present invention.
In the figure: 1. a tank body; 11. sealing the end; 2. a pressure sensing device; 21. a bearing plate; 22. a fixing plate; 23. a pressure sensor.
Detailed Description
The embodiments of the present invention will now be described with reference to the accompanying drawings.
Referring to fig. 1 and 2, the tank pressure distribution test method of the tank truck comprises the following steps:
the method comprises the following steps: the pressure sensor is characterized in that a sampling area is arranged in the tank body, a pressure sensing device for acquiring pressure data is fixed in the sampling area, and a data acquisition device in signal connection with the pressure sensing device is arranged for acquiring the pressure data.
The tank body 1 assembled on the washing and sweeping vehicle is used for truly simulating the impact of water or other liquid materials stored in the tank body 1 on the seal heads 11 of the tank body 1, as shown in fig. 1, sampling areas are arranged on the inner surfaces of the seal heads 11 at two sides of the tank body 1, and as shown in fig. 2, the sampling areas are sequentially arranged along the height direction of the seal heads 11 in a working state (namely, when the tank body is assembled on a vehicle body). There is not the interval between each sampling region, along direction of height end to end connection in proper order, liquid produced pressure to the impact of head 11 when can assemble the collection driving in sampling region. The tank body 1 is provided with an access hole for operators to go in and out of the tank body 1, so that the operation can be conveniently carried out in the tank body 1.
As shown in fig. 3, the pressure sensing device 2 includes two parallel plates, which are a fixed plate 22 and a force bearing plate 21, and the force bearing plate 21 is a square plate. An interval is arranged between the bearing plate 21 and the fixing plate 22, a pressure sensor 23 serving as a detection unit is arranged in the interval, one end of the pressure sensor 23 is fixedly connected with the bearing plate 21, when the bearing plate 21 receives liquid impact, the pressure can be transmitted to a pressure bearing surface of the pressure sensor 23 for bearing the pressure, and the other end of the pressure sensor 23 is directly fixed on the fixing plate 22. Four pressure sensors 23 are arranged in the space between the bearing plate 21 and the fixing plate 22, and the pressure sensors 23 are uniformly distributed on four corners between the bearing plate 21 and the fixing plate 22. The fixing plate 22 is fixedly connected with the inner surface of the end socket 11 to fix the pressure sensing device 2, and the bearing plate 21 bears the pressure caused by liquid impact in the driving process.
Before the pressure sensing device 2 is used, the pressure sensing device 2 needs to be calibrated, and the test error is reduced. In this step, the pressure sensing device 2 is calibrated by using a weight with a standard weight, and a calibration coefficient K can be calculated by using the weight with the standard weight and the reading of the pressure sensing device 2.
After the pressure sensor 2 is calibrated, the pressure sensor 2 is fixed to the inner surface of the head 11 by an adhesive, i.e., the fixing plate 22 is bonded to the inner surface of the head 11, and the adhesive may be loctite 406.
Step two: and injecting liquid into the tank body to immerse each pressure sensing device into the liquid, starting the tank car to drive the tank body to move, and obtaining and processing test data.
Directly pour into jar body 1 with the water as liquid material in to fill water in jar body 1, make the pressure sensing device 2 of pasting and establishing on head 11 submerge totally, make the hydroenergy of rocking impact on pressure sensing device 2's bearing plate 21 totally, guarantee the accuracy of test data.
The pressure sensor 23 in this embodiment has a product model of DYMH-103 and has a protection capability of IP67, and one side of the pressure sensor 23 close to the force bearing plate 21 and the fixing plate 22 is respectively provided with a screw for connecting with the force bearing plate 21 and the fixing plate 22. Nuts matched with the pressure sensor 23 are arranged at corresponding positions of the bearing plate 21 and the fixing plate 22, and a wire harness joint of the pressure sensor 23 is coated with sealant to ensure the underwater sealing effect.
After the tank body 1 is filled with water, directly starting the vehicle to move under a specific working condition, so that the water in the tank body 1 impacts the end sockets 11 on the two sides of the tank body 1 to obtain test data, and in the step five, the specific working condition of the vehicle running is emergency braking at the vehicle speed of 25-35km/h, so that the water in the tank body 1 impacts the end sockets 11 of the tank body 1 under the action of inertia, and the vehicle speed is preferably 30km/h in the vehicle running process.
In the test process, the data acquisition device acquires data transmitted from the pressure sensing device 2 in real time, because the four pressure sensors 23 are arranged in the pressure sensing device 2, each pressure sensor 23 acquires a corresponding signal, and the peak value of each pressure sensor is F1、F2、F3And F4The pressure value signal that pressure sensing device 2 exported to data acquisition device is: fy＝K*(F1+F2+F3+F4) Where K is a calibration coefficient obtained by converting a standard weight on the pressure sensing device 2.
In the test method, six sampling areas are provided, and in the test process, the pressure sensing devices 2 can be simultaneously and identically arranged in the six sampling areas, or the test can be respectively carried out in the six sampling areas by using one pressure sensing device 2. To arrange pressures respectivelyThe sensing device 2 is for example: in the test, the pressure sensor 2 was fixed to the area 3 (shown in the figure) of the head 11, and the vehicle was braked suddenly at a speed of 30km/h, and five times of operation were repeated to obtain five sets of test data, denoted as Fy1、Fy2、Fy3、Fy4And Fy5In this case, the pressure value in the 3-region can be recorded as Fa3＝(Fy1+Fy2+Fy3+Fy4+Fy5)/5。
The pressure which is brought to the corresponding position of the seal head 11 by the impact of the water is obtained, in the actual working process, the seal head 11 is correspondingly influenced by the water pressure, and the water pressure corresponding to the area 3 is PWater 3＝ρgh3Where ρ is the liquid density, h3The distance from the upper surface of the water at region 3.
By combining the above conditions, the pressure on the end socket 11 in the 3 regions can be obtained as follows: p3＝Fa3/S+ρgh3. Where S is the area of the force bearing plate 21.
The pressure values in the six sampling areas corresponding to the end socket 11, namely P, can be obtained by derivation according to the method1、P2、P3、P4、P5And P6Further, the pressure distribution of the whole end enclosure 11 is obtained, and technicians can perform simulation calculation and the like according to the obtained test data.
In other embodiments, the data acquisition device and the pressure sensing device may be first disposed on the canister, and then the canister may be integrally assembled to the vehicle.
In other embodiments, when the sampling regions are arranged, the sampling regions may be arranged at intervals, and the arrangement form of connecting the sampling regions end to end is not adopted.
In other embodiments, the particular driving conditions of the vehicle may also be adjusted, for example, by placing the vehicle in a state of rapid acceleration to collect test data.
In other embodiments, the fixed plate can also be connected with the fixed connection of the tank body through spot welding, clamping and magnetic attraction.
The tank body internal pressure test device comprises a pressure sensing device and a data acquisition device, wherein the structure of the pressure sensing device is shown in figure 3, and the structure and the use method of the pressure sensing device are the same as those of the tank body internal pressure test device in the tank body pressure distribution test method embodiment of the tank truck, so that repeated description is omitted.
The above-mentioned embodiments, the objects, technical solutions and advantages of the present invention are further described in detail, it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (5)
1. The tank body pressure distribution test method of the tank car is characterized in that: the method comprises the following steps: 1) a sampling area is arranged in the tank body, a pressure sensing device for acquiring pressure data is fixed in the sampling area, and a data acquisition device in signal connection with the pressure sensing device is arranged for acquiring the pressure data; 2) and injecting liquid into the tank body to immerse each pressure sensing device into the liquid, starting the tank car to drive the tank body to move, and obtaining and processing test data.
2. The tank pressure distribution test method of the tank truck according to claim 1, characterized in that: when setting up the sample area, each sample area is end to end in the direction of height of jar body.
3. Jar internal pressure test device, its characterized in that: including being used for fixing the pressure sensing device in jar internal portion and with pressure sensing device signal connection with the data acquisition device of gathering pressure data, pressure sensing device includes that the interval is arranged in order to be used for bearing the bearing board of liquid pressure and be used for with jar internal wall fixed plate, is provided with two at least pressure sensor in the interval of bearing board and fixed plate, pressure sensor both ends respectively with bearing board and fixed plate fixed connection.
4. The apparatus for testing internal pressure of a tank of claim 3, wherein: the bearing plate is square, and the pressure sensor is arranged at the corner of the bearing plate.
5. The can body internal pressure test apparatus according to claim 3 or 4, wherein: the fixed plate is fixed on the inner wall of the tank body through bonding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811218004.1A CN111076857A (en) | 2018-10-18 | 2018-10-18 | Tank body pressure distribution test method of tank car and tank body internal pressure test device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811218004.1A CN111076857A (en) | 2018-10-18 | 2018-10-18 | Tank body pressure distribution test method of tank car and tank body internal pressure test device |
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| CN111076857A true CN111076857A (en) | 2020-04-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811218004.1A Pending CN111076857A (en) | 2018-10-18 | 2018-10-18 | Tank body pressure distribution test method of tank car and tank body internal pressure test device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112816051A (en) * | 2020-12-28 | 2021-05-18 | 北京迈格威科技有限公司 | Sensor calibration method, weighing method and device and carrying equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102288348A (en) * | 2011-07-20 | 2011-12-21 | 山东交通学院 | Experimental bench for dynamically testing liquid tank |
| CN104081108A (en) * | 2011-10-24 | 2014-10-01 | 李明燮 | Apparatus and method for measuring the sloshing in the cargo tank of a liquefied natural gas carrier |
| CN104180984A (en) * | 2014-09-04 | 2014-12-03 | 吉林大学 | Fluid-solid two-way coupling real-time simulation test bench for tank truck |
| CN204085757U (en) * | 2014-09-18 | 2015-01-07 | 成都理工大学 | A kind of device of blocking for rolling stone impact force simulation test |
| CN104406767A (en) * | 2014-11-23 | 2015-03-11 | 大连理工大学 | Variable structure C-type LNG liquid tank sloshing test system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112816051A (en) * | 2020-12-28 | 2021-05-18 | 北京迈格威科技有限公司 | Sensor calibration method, weighing method and device and carrying equipment |
| CN112816051B (en) * | 2020-12-28 | 2023-12-01 | 北京迈格威科技有限公司 | Sensor calibration methods, weighing methods, devices and handling equipment |
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Application publication date: 20200428 |
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