CN202648737U - Liquid level detecting device, oil tank and digging machine - Google Patents
Liquid level detecting device, oil tank and digging machine Download PDFInfo
- Publication number
- CN202648737U CN202648737U CN 201220182190 CN201220182190U CN202648737U CN 202648737 U CN202648737 U CN 202648737U CN 201220182190 CN201220182190 CN 201220182190 CN 201220182190 U CN201220182190 U CN 201220182190U CN 202648737 U CN202648737 U CN 202648737U
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- liquid level
- pressure
- fuel tank
- container
- pressure transducer
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Abstract
The utility model provides a liquid level detecting device, which is used for detecting the liquid level position of liquid inside a container. The air pressure inside the container is different from the external air pressure. The liquid level detecting device comprises at least two pressure sensors and a processing system, wherein the pressure sensors are arranged in preset positions in the container, in addition, at least one pressure sensor is positioned at the height different from the height of other pressure sensors, the processing system is connected to each pressure sensor, and the processing system comprises a calculation unit used for receiving pressure value signals sent by the pressure sensors and calculating the liquid level position of the liquid in the container according to the pressure value signals. The utility model also provides an oil tank and a digging machine. The two sensors are adopted, so the errors caused by pre-pressure in the container can be eliminated when one senor is positioned above the liquid level, the goal of using the pressure sensors for detecting the liquid level of the container with the pre-pressure is realized, the detection results are accurate, and obviously, when the liquid level detecting device is applied to the oil tank, the liquid level position of the oil tank with the pre-pressure can be accurately detected.
Description
Technical field
The utility model relates to the Technology of Level Detection field, in particular to a kind of liquid level detection device, a kind of fuel tank and a kind of development machine.
Background technology
In order to make the oil pump oil suction convenient, usually a precompression can be applied in fuel tank, so generally be not standard atmospheric pressure in the fuel tank.And the development machine hydraulic pump is often inhaled sky because fuel tank liquid level crosses low, causes oil pump to damage, thereby causes great economic loss, so need to the liquid level position in the fuel tank be detected accurately.
Adopt floated young formula liquid level sensor more in the existing correlation technique, and liquid level detects not accurate enough; Perhaps adopt single pressure liquid level sensor, owing to be provided with precompression in the fuel tank, so inapplicable pressure oil tank.
The utility model content
Based on the above-mentioned background technology, technical problem to be solved in the utility model is, a kind of new liquid level detection device is provided, and the liquid level position of the fuel tank of precompression is arranged in can accurately detecting.
In view of this, the utility model provides a kind of liquid level detection device, liquid level position for detection of liquid in container, air pressure in the described container is not equal to ambient pressure, comprise: at least two pressure transducers, described at least two pressure transducers are arranged on the predeterminated position in the described container, and at least one pressure transducer is positioned at different height from other pressure transducer; Disposal system is connected to each pressure transducer, and described disposal system comprises computing unit, is used for receiving force value signal that described pressure transducer sends and according to the liquid level position of the described liquid in container of described force value calculated signals.
In this technical scheme, adopt two sensors, a sensor is positioned at more than the liquid level can eliminates the error that the container precompression brings, realized that with pressure transducer for detection of interior liquid level of establishing the container of precompression, testing result is accurate.Obviously, it is applied in the fuel tank, establishes the liquid level position of the fuel tank of precompression in can accurately detecting.
Preferably, at least one pressure transducer is arranged on the upper end in the described container.
Preferably, also comprise display, be connected to described disposal system, be used for receiving the result of calculation of described disposal system and showing described liquid level position information, oil level information can be shown intuitively, adopt corresponding measure thereby the user can obtain current oil level information at any time.
Another technical matters to be solved in the utility model is, a kind of new fuel tank is provided, and can avoid oil level to cross low and the damage oil pump.For this reason, the utility model provides a kind of fuel tank, and its inlet port is connected to oil pump, and described fuel tank comprises each described liquid level detection device in the technique scheme, described container is the casing of described fuel tank, and at least one pressure transducer is arranged on more than the described inlet port.
Preferably, at least one pressure transducer is arranged between the bottom surface of described inlet port and described casing.
Preferably, at least one pressure transducer is arranged on the height identical with described inlet port coboundary on the fuel tank side, and is the easiest to the calculating of oil level.
Preferably, described disposal system also comprises controller, is connected to described computing unit, and described controller gives the alarm when described liquid level position is lower than predeterminated position and/or forces to stop described oil pump.For example, when oil level reached half height of casing, controller can give the alarm, the situation of prompting user oil level; When oil level reaches apart from the not far position of inlet port, can give the alarm at this, the present oil level of reminding user is comparatively dangerous; When oil level is low to moderate the inlet port coboundary when following, the controller control oil pump quits work, thereby prevents oil pump from inhaling empty and damage oil pump, has effectively protected oil pump.
Preferably, described fuel tank also comprises pre-compressed air cleaner, is communicated with described box house.Precompression in the casing can obtain by pre-compressed air cleaner, so both can produce precompression and help the oil pump oil suction in casing, can also the air that enter in the casing be filtered, and prevents external impurities pollution fluid.
Preferably, described disposal system also comprises wave filter, is connected to each described pressure transducer, and the force value signal that described pressure transducer is sent carries out being sent to described computing unit after filtering is processed.
The utility model also provides a kind of development machine, comprises each described fuel tank in the technique scheme.
The liquid level detection device that the utility model can also be provided is applied in other the plant equipment and the fuel tank in the utility model can also be applied in the middle of other engineering machinery; can't be exhaustive at this; repeat no more, but its application all should be within protection domain of the present utility model.
In sum, by the utility model, adopt two sensors, a sensor is positioned at more than the liquid level can eliminates the error that the container precompression brings, realized that with pressure transducer for detection of interior liquid level of establishing the container of precompression, testing result is accurate; It is applied in the fuel tank, establishes the liquid level position of the fuel tank of precompression in can accurately detecting, cooperate calculating, control and the demonstration of disposal system, can prevent effectively that oil level from crossing low and to cause oil pump to be inhaled empty, protected well oil pump, reduced the oil pump cost.
Description of drawings
Fig. 1 is the synoptic diagram according to the fuel tank of the utility model embodiment.
Embodiment
In order more clearly to understand above-mentioned purpose of the present utility model, feature and advantage, below in conjunction with the drawings and specific embodiments the utility model is further described in detail.
A lot of details have been set forth in the following description so that fully understand the utility model; but; the utility model can also adopt other to be different from other modes described here and implement, and therefore, protection domain of the present utility model is not subjected to the restriction of following public specific embodiment.
Below in conjunction with drawings and Examples the utility model is described further.Need to prove that in the situation of not conflicting, the application's embodiment and the feature among the embodiment can make up mutually.
Fig. 1 is the synoptic diagram according to the fuel tank of the utility model embodiment.
As shown in Figure 1, fuel tank in the present embodiment adopts liquid level detection device of the present utility model, this liquid level detection device is for detection of the oil level in the casing 3 of fuel tank, in order to be beneficial to the oil pump oil suction, in casing 3, be preset with certain pressure, make pressure and atmospheric pressure in the casing 3 produce certain pressure difference.
Particularly, this liquid level detection device comprises: two pressure transducers, two pressure transducers are arranged on the predeterminated position in the fuel tank 3, and two pressure transducers are positioned at different height; Disposal system 4 is connected to each pressure transducer, and disposal system 4 comprises computing unit 41, be used for to receive force value signal that pressure transducer sends and according to the oil level in the force value calculated signals casing 3.
Wherein, pressure transducer quantity is two in the present embodiment, and one of them pressure transducer is arranged on position higher in the casing 3, and another is arranged on lower position, and this position need to be selected according to the concrete condition in the practice.
In addition, casing 3 interior precompressions can obtain by pre-compressed air cleaner 5, so both can help the oil pump oil suctions at casing 3 interior generation precompressions, can also filter the air that enter in the casing 3, prevent external impurities pollution fluid.
Certainly, the top that a pressure transducer is arranged in the casing 3 is preferred set-up mode, can guarantee like this as long as the casing of the fuel tank 3 discontented air pressures that can detect in the casing 3, and another pressure transducer is positioned at below the oil level, and the difference of the pressure that then can detect by two pressure transducers and the density of oil obtain oil level information.
Particularly, as shown in Figure 1, first sensor 61 is arranged on the top in the casing 3, and the second sensor 62 is arranged in the casing 3 position on the lower, and dotted line is the oil level line among the figure.At this moment, the pressure that records of first sensor is p
1, the pressure that the second sensor records is p
2, p=p then
2-p
1Be the suffered pressure of fluid when the degree of depth is h of the second sensor 62, i.e. p=ρ gh, ρ is the density of fluid, can obtain h thus, again according to the setting position of sensor and the distance h of casing 3 bottoms
0, the overall height that can obtain fluid this moment is h+h
0
Need to prove, it more than is preferred implementation of the present utility model, first sensor 61 obviously can be arranged on other height, can measure oil level equally, just when the oil level height extremely surpasses the height of first sensor 61, the height that only can detect level height and surpass the second sensor this moment, and can't obtain concrete level height, so the top that in the technique scheme first sensor is arranged in the fuel tank 3 should be optimal way of the present utility model.
In addition, although when the oil level height extremely surpasses the height of first sensor 61, the height that only can detect level height and surpass the second sensor, and can't obtain concrete level height, but and problem that easily cause oil pump damage inaccurate for oil level detection in the existing correlation technique, in this technical scheme as long as first sensor 61 is arranged on position more than the inlet port, can guarantee to cross when hanging down and to detect at oil level, although so be not optimum embodiment, but still can solve the technical matters in the existing correlation technique.
It is evident that; although only adopted two sensors in the present embodiment; but adopt more sensor can realize equally; and; obviously the liquid level sensor in above-described embodiment can also be applied in other container has in the environment of preset pressure; these variations only are simple transformation of the present utility model, and need not to pay creative work, obviously should belong to protection domain of the present utility model.
By above technical scheme, two sensors are set in some way, can in fuel tank 3, have under the environment for use of certain pressure and record exactly oil level, and for another technical matters to be solved in the utility model, how to prevent that namely oil level from crossing low and problem that cause oil pump to damage, can be by such scheme be improved solution.
Particularly, based on technique scheme, as long as a sensor setting is arranged at the height of inlet port more than 2 of fuel tank:
If a. another sensor setting is at higher height, be not 0 can guarantee that the oil pump oil suction can not inhale sky as long as guarantee the pressure differential of two sensors then;
If b. another sensor setting is below inlet port, then liquid level sensor can accurately record oil level when oil level is lower than the higher sensor in position, thereby avoids oil level excessively low;
If c. the height of another sensor setting between this sensor and inlet port is then identical with situation a.
Principle is identical in above principle and the previous embodiment, and the art personnel should be readily appreciated that, repeat no more.
As preferred implementation, as shown in Figure 1, first sensor 61 is arranged on top (this scheme effect no longer repeats) in the fuel tank 3, the second sensor 62 is arranged on the position contour with the coboundary of inlet port 2, then need not be to h
0Calculate, as long as p
2-p
1=0 just can draw the excessively low conclusion of oil level, the easiest.
Based on present embodiment, between sensor and computing unit 41, wave filter 43 is set, eliminate high-frequency signal, remove the noise in the signal, guarantee the accuracy of computing unit 41 received data.
Further, computing unit 41 outputs to result of calculation in the controller 42, and controller 42 is according to result of calculation, gives the alarm when liquid level position is lower than predeterminated position and/or forces to stop oil pump.Particularly, for example, when oil level reached half height of casing 3, controller 42 can give the alarm, the situation of prompting user oil level; When oil level reaches apart from the not far position of inlet port 2, can give the alarm at this, the present oil level of reminding user is comparatively dangerous; When oil level is low to moderate inlet port 2 coboundarys when following, controller 42 control oil pumps quit work, thereby prevent oil pump from inhaling empty and damage oil pump.
Computing unit 41 can also export result of calculation to display 1, and oil level information is shown intuitively, adopts corresponding measure thereby the user can obtain current oil level information at any time.
Fuel tank in the technique scheme is applied in the development machine, can obtains the embodiment of development machine in the utility model.
In sum, by the utility model, adopt two sensors, a sensor is positioned at more than the liquid level can eliminates the error that the container precompression brings, realized that with pressure transducer for detection of interior liquid level of establishing the container of precompression, testing result is accurate; It is applied in the fuel tank, establishes the liquid level position of the fuel tank of precompression in can accurately detecting, cooperate calculating, control and the demonstration of disposal system, can prevent effectively that oil level from crossing low and to cause oil pump to be inhaled empty, protected well oil pump, reduced the oil pump cost.
The above is preferred embodiment of the present utility model only, is not limited to the utility model, and for a person skilled in the art, the utility model can have various modifications and variations.All within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.
Claims (10)
1. liquid level detection device, for detection of the liquid level position of liquid in container, the air pressure in the described container is not equal to ambient pressure, it is characterized in that, comprising:
At least two pressure transducers, described at least two pressure transducers are arranged on the predeterminated position in the described container, and at least one pressure transducer is positioned at different height from other pressure transducer;
Disposal system (4), be connected to each pressure transducer, described disposal system (4) comprises computing unit (41), is used for receiving force value signal that described pressure transducer sends and according to the liquid level position of the described liquid in container of described force value calculated signals.
2. liquid level detection device according to claim 1 is characterized in that, at least one pressure transducer is arranged on the upper end in the described container.
3. liquid level detection device according to claim 1 and 2, it is characterized in that, also comprise: display (1), be connected to described disposal system (4), be used for receiving the result of calculation of described disposal system (4) and showing described liquid level position information.
4. fuel tank, its inlet port (2) is connected to oil pump, it is characterized in that, comprises such as each described liquid level detection device in the claims 1 to 3, described container is the casing (3) of described fuel tank, and at least one pressure transducer is arranged on more than the described inlet port (2).
5. fuel tank according to claim 4 is characterized in that, at least one pressure transducer is arranged between the bottom surface of described inlet port (2) and described casing (3).
6. fuel tank according to claim 4 is characterized in that, at least one pressure transducer is arranged on the height identical with described inlet port (2) coboundary on the fuel tank side.
7. each described fuel tank in 6 according to claim 4, it is characterized in that, described disposal system (4) also comprises controller (42), be connected to described computing unit (41), described controller (42) gives the alarm when described liquid level position is lower than predeterminated position and/or forces to stop described oil pump.
8. fuel tank according to claim 7 is characterized in that, also comprises pre-compressed air cleaner (5), with described casing (3) internal communication.
9. fuel tank according to claim 7, it is characterized in that, described disposal system (4) also comprises wave filter (43), is connected to each described pressure transducer, and the force value signal that described pressure transducer is sent carries out being sent to described computing unit (41) after filtering is processed.
10. a development machine is characterized in that, comprises such as each described fuel tank in the claim 4 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220182190 CN202648737U (en) | 2012-04-25 | 2012-04-25 | Liquid level detecting device, oil tank and digging machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220182190 CN202648737U (en) | 2012-04-25 | 2012-04-25 | Liquid level detecting device, oil tank and digging machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202648737U true CN202648737U (en) | 2013-01-02 |
Family
ID=47417832
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220182190 Expired - Fee Related CN202648737U (en) | 2012-04-25 | 2012-04-25 | Liquid level detecting device, oil tank and digging machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202648737U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108871494A (en) * | 2018-08-29 | 2018-11-23 | 南京智鹤电子科技有限公司 | oil level measuring device |
| CN110462205A (en) * | 2017-03-29 | 2019-11-15 | 福伊特专利有限公司 | Hydraulic with the equipment for measuring the water level in suction tube and the method for draining |
| CN111649798A (en) * | 2020-06-30 | 2020-09-11 | 三一专用汽车有限责任公司 | Detection method, vehicle, detection device, and computer-readable storage medium |
-
2012
- 2012-04-25 CN CN 201220182190 patent/CN202648737U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110462205A (en) * | 2017-03-29 | 2019-11-15 | 福伊特专利有限公司 | Hydraulic with the equipment for measuring the water level in suction tube and the method for draining |
| US11280310B2 (en) | 2017-03-29 | 2022-03-22 | Voith Patent Gmbh | Hydraulic machine having a device for measuring the water level in the intake pipe and method for drainage |
| CN108871494A (en) * | 2018-08-29 | 2018-11-23 | 南京智鹤电子科技有限公司 | oil level measuring device |
| CN111649798A (en) * | 2020-06-30 | 2020-09-11 | 三一专用汽车有限责任公司 | Detection method, vehicle, detection device, and computer-readable storage medium |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130102 Termination date: 20150425 |
|
| EXPY | Termination of patent right or utility model |