CN210293402U - Self-adaptive liquid weighing system - Google Patents
Self-adaptive liquid weighing system Download PDFInfo
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- CN210293402U CN210293402U CN201920786993.8U CN201920786993U CN210293402U CN 210293402 U CN210293402 U CN 210293402U CN 201920786993 U CN201920786993 U CN 201920786993U CN 210293402 U CN210293402 U CN 210293402U
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Abstract
The utility model provides a self-adaptation liquid weighing system. The adaptive liquid weighing system includes: a weighing device; the large flow valve is connected with the weighing device and used for controlling a first overflowing amount of liquid flowing through the weighing device, and the range value of the first overflowing amount is Q1; and the small flow valve is connected with the weighing device and is used for controlling a second overflowing amount of the liquid flowing through the weighing device, and the range value of the second overflowing amount is Q2, wherein Q1 is more than Q2. The flow rate of liquid flowing into the weighing device is controlled by setting the large flow valve and the small flow valve, so that the controllability of the flow rate of liquid weighing is realized, and the reliability of the weighing result of the weighing device is effectively improved. The weighing system has the advantages of high weighing speed, accurate weighing result, automatic adaptation to the change of the external environment, and capability of stably and reliably realizing accurate weighing of the weight of flowing liquid.
Description
Technical Field
The utility model relates to a liquid weighing equipment technical field particularly, relates to a self-adaptation liquid weighing system.
Background
The existing liquid weighing control system adopts a system to shut off a liquid feeding valve after weighing liquid reaches a preset certain weight, the weight of the liquid has a certain overshoot value in the valve shutting process, and the overshoot value is a constant value when the pressure and the density of the liquid are not changed, so that the system has the following problems:
the liquid feeding speed cannot be too fast, if the liquid flow speed is fast, a large impact force can be applied to the liquid weighing device, the weight weighed by the weighing device contains liquid flow force, and the weighing precision is reduced. Only the weighing speed can be sacrificed in order to improve the weighing accuracy.
The repeated precision of liquid weighing is poor, and the valve shuts off the overshoot value of in-process liquid weight, can receive the influence of liquid pressure and density change, when the pressure and the density of liquid change, need the manual adjustment to predetermine weight and adapt to.
Liquid has the residue on weighing device or there are other impurity on the weighing device, and the system can not automatic adjustment predetermines weight and adapts to this kind of tare change to weighing system's influence to cause the big problem of error of weighing result.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a main aim at provides a self-adaptation liquid weighing system to solve the big problem of liquid weighing equipment weighing result error among the prior art.
In order to achieve the above object, according to an aspect of the present invention, there is provided an adaptive liquid weighing system, including: a weighing device; the large flow valve is connected with the weighing device and used for controlling a first overflowing amount of liquid flowing through the weighing device, and the range value of the first overflowing amount is Q1; and the small flow valve is connected with the weighing device and is used for controlling a second overflowing amount of the liquid flowing through the weighing device, and the range value of the second overflowing amount is Q2, wherein Q1 is more than Q2.
Further, the weighing device includes: and the weighing sensor is used for detecting the weight of the liquid, and when the weighing sensor detects that the weight of the liquid is M1 and M1 is not more than M-g, the large-flow valve is in an open state, wherein M is a preset weighing value, and g is a parameter.
Further, when the weight of the liquid detected by the weighing sensor is M2 and M2 is not more than M-g, the large flow valve is in a closed state, the small flow valve is in an open state, and M2 is more than M1.
Further, the adaptive liquid weighing system further comprises: and the control module is electrically connected with the large flow valve and the small flow valve and is used for controlling the opening degree of the large flow valve and the small flow valve.
Further, the self-adaptive liquid weighing system also comprises a time prediction module, and when the time prediction module predicts that the opening time of the large flow valve exceeds the first preset weighing time during weighing, the control module controls the large flow valve to increase the opening degree of the large flow valve.
Further, during weighing, when the time prediction module predicts that the opening time of the large flow valve is lower than the second preset weighing time, the control module controls the large flow valve to reduce the opening degree of the large flow valve.
Further, the self-adaptive liquid weighing system also comprises a precision prediction module, and when the precision prediction module predicts that the weight of the liquid is higher than a preset precision upper limit value during weighing, the control module controls the small flow valve to reduce the opening degree of the small flow valve.
Further, at the time of weighing, when the precision prediction module predicts that the weight of the liquid is lower than the preset precision lower limit value, the control module controls the small flow valve to increase the opening degree of the small flow valve.
Further, the self-adaptive liquid weighing system also comprises a tare weight removing module, the tare weight removing module is electrically connected with the weighing inductor, and before weighing, the tare weight removing module reads a numerical value on the weighing inductor and records the numerical value as a tare weight value of the weighing device.
Use the technical scheme of the utility model, come control liquid to flow into the velocity of flow in the weighing device through setting up big flow valve and low flow valve, realized that the liquid flow rate of flow of weighing is controllable, improved the reliability of weighing device's the result of weighing effectively. The weighing system has the advantages of high weighing speed, accurate weighing result, automatic adaptation to the change of the external environment, and capability of stably and reliably realizing accurate weighing of the weight of flowing liquid.
Drawings
The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 shows a schematic structural diagram of an embodiment of an adaptive liquid weighing system according to the present invention.
Wherein the figures include the following reference numerals:
10. a weighing device; 11. a weighing sensor;
20. a large flow valve;
30. a small flow valve.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Exemplary embodiments according to the present application will now be described in more detail with reference to the accompanying drawings. These exemplary embodiments may, however, be embodied in many different forms and should not be construed as limited to only the embodiments set forth herein. It is to be understood that these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art, in the drawings, it is possible to enlarge the thicknesses of layers and regions for clarity, and the same devices are denoted by the same reference numerals, and thus the description thereof will be omitted.
Referring to fig. 1, according to an embodiment of the present invention, an adaptive liquid weighing system is provided.
The system comprises a weighing device 10, a large flow valve 20 and a small flow valve 30. The weighing device 10 is connected and the large flow valve 20 is used to control a first overflow of liquid flowing through the weighing device 10. The first excess flow has a range value of Q1. The small flow valve 30 is connected to the weighing apparatus 10, and the small flow valve 30 is used to control a second flow rate of the liquid flowing through the weighing apparatus 10, the second flow rate having a range value of Q2, wherein Q1 > Q2.
In the embodiment, the flow rate of the liquid flowing into the weighing device is controlled by setting the large flow valve and the small flow valve, so that the weighing flow rate of the liquid is controllable, and the reliability of the weighing result of the weighing device is effectively improved. The weighing system has the advantages of high weighing speed, accurate weighing result, automatic adaptation to the change of the external environment, and capability of stably and reliably realizing accurate weighing of the weight of flowing liquid. As shown in fig. 1, the large flow valve 20 is located above the small flow valve 30.
Wherein the weighing device 10 comprises a weighing sensor 11. The weighing sensor 11 is used for detecting the weight of the liquid, and when the weight of the liquid detected by the weighing sensor 11 is M1 and M1 is not more than M-g, the large flow valve 20 is in an open state, wherein M is a preset weighing value and g is a parameter. When the weight of the liquid detected by the weighing sensor 11 is M2 and M2 is not more than M-g, the large flow valve 20 is in a closed state, the small flow valve 30 is in an open state, and M2 is more than M1. The weighing speed of the weighing system can be improved by the arrangement.
Further, the adaptive liquid weighing system also comprises a control module. The control module is electrically connected to the large flow valve 20 and the small flow valve 30, and the control module is used for controlling the opening degree of the large flow valve 20 and the small flow valve 30. The adaptive liquid weighing system further comprises a time prediction module, and when the time prediction module predicts that the opening time of the large flow valve 20 exceeds a first preset weighing time during weighing, the control module controls the large flow valve 20 to increase the opening degree of the large flow valve 20. During weighing, when the time prediction module predicts that the opening time of the high flow valve 20 is less than the second preset weighing time, the control module controls the high flow valve 20 to reduce the opening degree of the high flow valve 20.
The self-adaptive liquid weighing system further comprises a precision prediction module, and when the precision prediction module predicts that the weight of the liquid is higher than a preset precision upper limit value during weighing, the control module controls the small flow valve 30 to reduce the opening degree of the small flow valve 30. In weighing, when the precision prediction module predicts that the weight of the liquid is lower than the preset precision lower limit value, the control module controls the small flow valve 30 to increase the opening degree of the small flow valve 30. The weighing device can not only ensure the weighing speed, but also improve the accuracy of the weighing result.
The self-adaptive liquid weighing system further comprises a tare weight removing module, the tare weight removing module is electrically connected with the weighing inductor 11, and before weighing, the tare weight removing module reads a numerical value on the weighing inductor 11 and records the numerical value as a tare weight value of the weighing device 10.
Specifically, the utility model provides a pair of a control system for liquid is weighed has and weighs fastly, and the weighing result is accurate, and the liquid weight is weighed to the dynamic that can reliable and stable that the external environment of automatic adaptation changes. The liquid weighing is quick and accurate, and the influence caused by the symmetry quantity when the external condition changes can be adapted.
Due to the fact that the time prediction module, the precision prediction module and the tare removal module are arranged, the system can automatically make up for the influence of the precision and the speed of the weighing when the pressure and the flow change, and can automatically make up for the influence of the residual weight before weighing at each time on the final weighed weight.
As shown in fig. 1, the adaptive liquid weighing control system has a large flow valve for controlling the injection of a large flow rate of liquid and a small flow valve for controlling the injection of a small flow rate of liquid, the large flow valve is opened to accelerate the liquid weighing speed when the actual weight is far lower than the set weight, and the large flow valve is closed when the actual weight approaches the set value, and the set value of the weight is called as a large valve closing value. After the large-flow valve is closed, the small-flow valve is opened, the small-flow valve has small flow, the overshoot value when the small-flow valve is closed can be well controlled, the weighing precision of the system is improved, when the actual weight reaches a set value, the small-flow valve is closed, and the set value of the weight is called as a small-valve closing value.
The weighing speed is faster as the large valve closing value is closer to the final set value, but the final weighing precision is influenced due to the overshoot value in the large valve closing process, the final weighing weight of the system is directly influenced by the small valve closing value, and the weight value is influenced by the overshoot value of the system when the small valve is closed. The control system automatically adjusts the closing value of the large valve and the closing value of the small valve according to two indexes of the total time and control precision range required by weighing. When the weighing time exceeds the required time, the system can increase the closing value of the large valve, when the weighing time is lower than the lower limit of the required time, the system can decrease the closing value of the large valve, when the weighing value is higher than the upper limit of the precision range, the system can decrease the closing value of the small valve, and when the weighing value is lower than the lower limit of the precision range, the system can increase the closing value of the small valve. When the liquid has residue on the weighing device or other impurities exist on the weighing device, the system can automatically acquire the current weight before weighing each time and take the weight as the tare weight.
Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
In addition to the foregoing, it should be noted that reference throughout this specification to "one embodiment," "another embodiment," "an embodiment," or the like, means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment described generally throughout this application. The appearances of the same phrase in various places in the specification are not necessarily all referring to the same embodiment. Further, when a particular feature, structure, or characteristic is described in connection with any embodiment, it is submitted that it is within the scope of the invention to effect such feature, structure, or characteristic in connection with other embodiments.
In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. An adaptive liquid weighing system, comprising:
a weighing device (10);
the large flow valve (20) is connected with the weighing device (10), the large flow valve (20) is used for controlling a first overflow quantity of liquid flowing through the weighing device (10), and the range value of the first overflow quantity is Q1;
a small flow valve (30), the small flow valve (30) being connected to the weighing device (10), the small flow valve (30) being adapted to control a second excess flow of the liquid flowing through the weighing device (10), the second excess flow having a value in the range Q2, wherein Q1 > Q2.
2. The adaptive liquid weighing system according to claim 1, wherein the weighing device (10) comprises:
the liquid flow valve comprises a weighing sensor (11), wherein the weighing sensor (11) is used for detecting the weight of liquid, when the weighing sensor (11) detects that the weight of the liquid is M1 and M1 is not more than M-g, the large flow valve (20) is in an opening state, M is a preset weighing value, and g is a parameter.
3. The adaptive liquid weighing system according to claim 2, wherein when the load cell (11) detects a weight of the liquid of M2 and M2 ≦ M-g, the high flow valve (20) is in a closed state, the low flow valve (30) is in an open state, and M2 > M1.
4. The adaptive liquid weighing system of claim 1, further comprising:
a control module electrically connected to the high flow valve (20) and the low flow valve (30), the control module being configured to control the degree of opening of the high flow valve (20) and the low flow valve (30).
5. The adaptive liquid weighing system according to claim 4, characterized in that it further comprises a time prediction module which, when weighing, controls the large flow valve (20) to increase the opening degree of the large flow valve (20) when it predicts that the opening time of the large flow valve (20) exceeds a first preset weighing time.
6. The adaptive liquid weighing system according to claim 5, characterized in that, at the time of weighing, when the time prediction module predicts that the opening time of the large flow valve (20) is lower than a second preset weighing time, the control module controls the large flow valve (20) to reduce the opening degree of the large flow valve (20).
7. The adaptive liquid weighing system according to claim 4, further comprising a precision prediction module that controls the small flow valve (30) to reduce the degree of opening of the small flow valve (30) when the precision prediction module predicts that the weight of the liquid is higher than a preset precision upper limit value at the time of weighing.
8. The adaptive liquid weighing system according to claim 7, wherein the control module controls the small flow valve (30) to increase the opening degree of the small flow valve (30) when the accuracy prediction module predicts that the weight of the liquid is lower than a preset accuracy lower limit value at the time of weighing.
9. The adaptive liquid weighing system according to claim 2, further comprising a tare weight module electrically connected to the weighing sensor (11), the tare weight module reading a value on the weighing sensor (11) and noting the value as tare weight of the weighing apparatus (10) before weighing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920786993.8U CN210293402U (en) | 2019-05-28 | 2019-05-28 | Self-adaptive liquid weighing system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920786993.8U CN210293402U (en) | 2019-05-28 | 2019-05-28 | Self-adaptive liquid weighing system |
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| Publication Number | Publication Date |
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| CN210293402U true CN210293402U (en) | 2020-04-10 |
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| CN201920786993.8U Active CN210293402U (en) | 2019-05-28 | 2019-05-28 | Self-adaptive liquid weighing system |
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Effective date of registration: 20210325 Address after: 100007 Oil Mansion, 9 North Avenue, Dongcheng District, Beijing, Dongzhimen Patentee after: PetroChina Co.,Ltd. Patentee after: Daqing Petrochemical Machinery Factory Co.,Ltd. Address before: 100007 Oil Mansion, 9 North Avenue, Dongcheng District, Beijing, Dongzhimen Patentee before: PetroChina Co.,Ltd. |