CN219178666U - Liquid level detection device and system applied to raw coal washing and dressing plant - Google Patents
Liquid level detection device and system applied to raw coal washing and dressing plant Download PDFInfo
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- CN219178666U CN219178666U CN202320395130.4U CN202320395130U CN219178666U CN 219178666 U CN219178666 U CN 219178666U CN 202320395130 U CN202320395130 U CN 202320395130U CN 219178666 U CN219178666 U CN 219178666U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
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Abstract
The utility model relates to the technical field of liquid level detection, in particular to a liquid level detection device and a liquid level detection system applied to a raw coal washout plant, wherein the liquid level detection device comprises a fixed frame, a high liquid level metal rod, a public end metal rod and a low liquid level metal rod, wherein the high liquid level metal rod, the public end metal rod and the low liquid level metal rod are respectively fixed on the fixed frame and are electrically insulated from the fixed frame; the high liquid level metal pole, the one end of public end metal pole and low liquid level metal pole all are connected with binding post, and the other end is the free end, and wherein, the height of the free end of high liquid level metal pole is higher than the height of the free end of low liquid level metal pole, and the height of the free end of low liquid level metal pole is higher than the height of the free end of public end metal pole. The utility model avoids the influence of the conditions of easy deposition, easy blockage, easy foaming and the like of the medium on the detection of the instrument, can truly and effectively reflect the liquid level in the actual production process, and can be connected into a DCS system to be used as a high-low liquid level alarm or an interlocking pump to automatically control the start and stop, thereby being accurate and reliable.
Description
Technical Field
The utility model relates to the technical field of liquid level detection, in particular to a liquid level detection device and a liquid level detection system applied to a raw coal washing plant.
Background
In the production process of raw coal flotation by washing, the flotation concentrate obtained by the flotation device is required to be sent into a concentrate barrel. Because the flotation concentrate contains a flotation frothing agent and small particle clean coal, the flotation concentrate in the concentrate barrel can be deposited and frothed.
Therefore, when liquid level detection is carried out, the floating fine deposit is easy to cause blockage, and the use of the static pressure type liquid level meter is greatly influenced. For the floating fine foaming, if a radar liquid level meter is used, false liquid level is easy to cause, real liquid level cannot be reflected, the cost is high, and the maintenance amount of maintenance personnel is increased; if the floating ball liquid level switch is used, misoperation is easy, and the requirement of the use working condition on liquid level detection cannot be met.
Disclosure of Invention
The utility model provides a liquid level detection device and a liquid level detection system applied to a raw coal washing plant, which overcome the defects of the prior art, and can effectively solve the problems that the conditions of easy deposition, easy blockage, easy foaming and the like of a medium influence the detection of an instrument and cannot truly and effectively reflect the liquid level.
One of the technical schemes of the utility model is realized by the following measures: the liquid level detection device comprises a fixing frame, a high liquid level metal rod, a public end metal rod and a low liquid level metal rod, wherein the high liquid level metal rod, the public end metal rod and the low liquid level metal rod are respectively fixed on the fixing frame and are electrically insulated from the fixing frame; the high liquid level metal pole, the one end of public end metal pole and low liquid level metal pole all are connected with binding post, and the other end is the free end, and wherein, the height of the free end of high liquid level metal pole is higher than the height of the free end of low liquid level metal pole, and the height of the free end of low liquid level metal pole is higher than the height of the free end of public end metal pole.
The following are further optimizations and/or improvements to one of the above-described inventive solutions:
three insulating sleeves can be fixedly arranged on the fixing frame, and the high-liquid-level metal rod, the public-end metal rod and the low-liquid-level metal rod are respectively arranged inside the insulating sleeves in a penetrating mode.
The fixing frame can be provided with a fixing clip, and the insulating sleeve is fixedly connected with the fixing frame through the fixing clip.
The second technical scheme of the utility model is realized by the following measures: the liquid level detection system applied to the raw coal washing plant comprises the DCS and the liquid level detection device applied to the raw coal washing plant, and the liquid level detection device applied to the raw coal washing plant is electrically connected with the DCS.
The following is a further optimization and/or improvement of the second technical scheme of the utility model:
the DCS may be provided with at least two sets of digital signal input interfaces, one set of digital signal input interfaces connecting the high level metal rod and the common end metal rod, and the other set of digital signal input interfaces connecting the low level metal rod and the common end metal rod.
The system also comprises a machine pump, and the machine pump is electrically connected with the DCS.
The utility model avoids the influence of the conditions of easy deposition, easy blockage, easy foaming and the like of the medium on the detection of the instrument, and can truly and effectively reflect the liquid level in the actual production process. Compared with a single-flange static pressure type liquid level meter, the hydraulic pressure type liquid level meter has the advantages that the hydraulic pressure type liquid level meter is simple in structure and convenient to construct, and compared with the single-flange static pressure type liquid level meter, the hydraulic pressure type liquid level meter is required to be provided with holes on a tank body, the integrity of an internal wear-resisting brick is affected, and the hydraulic pressure type liquid level meter is not required to be constructed on an upper opening of an intermediate tank body; maintenance is avoided after installation and debugging are finished, and periodic verification is not needed like a static pressure type liquid level meter; the detection is reliable, and the phenomenon of false liquid level caused by float coal deposition and bubbling is not needed to be worried about by utilizing the conductivity of water; the manufacturing cost is low, and the detection device can be manufactured by using galvanized round steel common in construction. The system can also be connected with a DCS system to be used as a high-low liquid level alarm or an interlocking pump to automatically control start and stop, and is accurate and reliable.
Drawings
Fig. 1 is a schematic overall structure of an embodiment of the present utility model.
Fig. 2 is a schematic structural diagram of a liquid level detecting device according to an embodiment of the present utility model.
Fig. 3 is a schematic structural diagram of a liquid level detection system according to an embodiment of the present utility model.
Fig. 4 is a schematic diagram of a control principle of the liquid level detection system according to the embodiment of the present utility model.
The codes in the drawings are respectively: 1 is a wiring terminal, 2 is a filter press feeding barrel, 3 is an insulating sleeve, 4 is a fixing frame, 5 is a fixing clamp, 6 is a high-liquid-level metal rod, 7 is a public-end metal rod, 8 is a low-liquid-level metal rod, 9 is a concentrate barrel, 10 is a pump, and 11 is a pipeline.
Detailed Description
The present utility model is not limited by the following examples, and specific embodiments can be determined according to the technical scheme and practical situations of the present utility model.
In the present utility model, for convenience of description, the description of the relative positional relationship of each component is described according to the layout manner of the drawings in the specification, such as: the positional relationship of the front, rear, upper, lower, left, right, etc. is determined in accordance with the layout direction of the drawings of the specification.
The utility model is further described below with reference to examples and figures:
example 1: as shown in fig. 1 and 2, the liquid level detection device applied to the raw coal washing plant comprises a fixed frame 4, a high liquid level metal rod 6, a public end metal rod 7 and a low liquid level metal rod 8, wherein the high liquid level metal rod 6, the public end metal rod 7 and the low liquid level metal rod 8 are respectively fixed on the fixed frame 4 and are electrically insulated from the fixed frame 4; one ends of the high liquid level metal rod 6, the public end metal rod 7 and the low liquid level metal rod 8 are all connected with the wiring terminal 1, and the other ends are all free ends, wherein the height of the free ends of the high liquid level metal rod 6 is higher than that of the free ends of the low liquid level metal rod 8, and the height of the free ends of the low liquid level metal rod 8 is higher than that of the free ends of the public end metal rod 7. Wherein, the fixing frame 4 can be angle iron and is fixedly provided with three insulating sleeves 3 on the fixing frame 4, and the high liquid level metal rod 6, the public end metal rod 7 and the low liquid level metal rod 8 are respectively penetrated inside the insulating sleeves 3. The fixing frame 4 is provided with a fixing clip 5, and the insulating sleeve 3 is fixedly connected with the fixing frame 4 through the fixing clip 5.
The liquid level detection device is used in the float coal concentrate barrel 9, and the working principle is that the high and low liquid level detection is realized by utilizing the conductivity of a metal rod and water. When raw coal is subjected to flotation production, after flotation concentrate obtained by a flotation device is fed into a concentrate barrel 9, the liquid level firstly rises to the free end of a common end metal rod 7 along with the rising of the liquid level, the liquid level continues to rise, and then the liquid level rises to the free end of a low liquid level metal rod 8. Due to the conductivity of the metal rod and water, the free end of the low liquid level metal rod 8 and the free end of the common end metal rod 7 are changed from an off state to an on state, so that a low liquid level on-off signal is generated. Similarly, when the liquid level rises to the free end of the high-liquid-level metal rod 6, the free end of the high-liquid-level metal rod 6 and the free end of the public-end metal rod 7 are changed from an off state to an on state due to the conductivity of the metal rod and water, so that an on-off signal of the high liquid level is generated.
The embodiment combines the actual working conditions of the raw coal washing flotation concentrate barrel 9, avoids the influence of the conditions of easy medium deposition, easy blockage, easy foaming and the like on instrument detection, and can truly and effectively reflect the liquid level in the actual production process. In the raw coal flotation production process, the concentrate barrel 9 is used as an intermediate buffer device, a specific liquid level value does not need to be accurately measured, and the static pressure type liquid level meter, the radar liquid level meter and the floating ball liquid level switch have great limitations in such working conditions. After comprehensive analysis, the utility model has higher practicability in the working conditions. Compared with a single-flange static pressure type liquid level meter, the hydraulic pressure type liquid level meter has the advantages that the hydraulic pressure type liquid level meter is simple in structure and convenient to construct, and compared with the single-flange static pressure type liquid level meter, the hydraulic pressure type liquid level meter is required to be provided with holes on a tank body, the integrity of an internal wear-resisting brick is affected, and the hydraulic pressure type liquid level meter is not required to be constructed on an upper opening of an intermediate tank body; maintenance is avoided after installation and debugging are finished, and periodic verification is not needed like a static pressure type liquid level meter; the detection is reliable, and the phenomenon of false liquid level caused by float coal deposition and bubbling is not needed to be worried about by utilizing the conductivity of water; the manufacturing cost is low, and the detection device can be manufactured by using galvanized round steel common in construction.
Example 2: as shown in fig. 1, 2, 3 and 4, the liquid level detection system applied to the raw coal washery comprises the DCS and the liquid level detection device applied to the raw coal washery, and the liquid level detection device applied to the raw coal washery is electrically connected with the DCS. The DCS is provided with at least two groups of digital quantity signal input interfaces, wherein one group of digital quantity signal input interfaces is connected with the high liquid level metal rod 6 and the public end metal rod 7, and the other group of digital quantity signal input interfaces is connected with the low liquid level metal rod 8 and the public end metal rod 7. The machine pump 10 is also included, and the machine pump 10 is electrically connected with the DCS. The pump 10 is arranged at the bottom of the concentrate barrel 9, the feed inlet of the pump 10 is connected with the concentrate barrel 9 through a pipeline 11, and the discharge outlet of the pump 10 is connected with the filter press feeding barrel 2 through the pipeline 11.
In this embodiment, the on-off signal of the low liquid level and the on-off signal of the high liquid level can be used as passive contacts to access the DCS system, wherein the common terminal metal rod 7 is connected with the low liquid level metal rod 8 at a normally closed point, and the common terminal metal rod 7 is connected with the high liquid level metal rod 6 at a normally open point, specifically under the following conditions: when the liquid level is lower than the free end of the low liquid level metal rod 8, the common end metal rod 7 is disconnected with the low liquid level metal rod 8, and a low liquid level alarm is generated. When the liquid level is higher than the free end of the low liquid level metal rod 8 and lower than the free end of the high liquid level metal rod 6, no alarm is given. When the liquid level is higher than the free end of the high liquid level metal rod 6, the public end metal rod 7 is closed and communicated with the high liquid level metal rod 6, and a high liquid level alarm is generated.
In the embodiment, the on-off signal of the low liquid level and the on-off signal of the high liquid level can be used as the high-low liquid level alarm of the float coal concentrate barrel 9, and the corresponding pump 10 is controlled by interlocking start and stop at the same time, so that the height of the liquid level is controlled. When the liquid level is lower than the free end of the low liquid level metal rod 8, the common end metal rod 7 is disconnected from the low liquid level metal rod 8, and the controller pump 10 is in a stop state. When the liquid level is higher than the free end of the low liquid level metal rod 8 and lower than the free end of the high liquid level metal rod 6, the common end metal rod 7 is closed with the low liquid level metal rod 8 and is disconnected with the high liquid level metal rod 6, and the controller pump 10 is kept in a stop state. When the liquid level is higher than the free end of the high-liquid-level metal rod 6, the common-end metal rod 7 is closed with the high-liquid-level metal rod 6, the interlocking start of the pump 10 is controlled, the liquid level starts to drop, and the pump 10 keeps in an operating state until the low-liquid-level interlocking stop is triggered. The float coal is sent into a feeding barrel 2 of the filter press in a reciprocating way, so that the aim of recycling the float water system is fulfilled.
When the embodiment is applied to liquid level detection of a raw coal washing plant, the DCS can be connected to serve as a high-low liquid level alarm or an interlocking pump to automatically control start and stop, so that the method is accurate and reliable. The automatic control device can be used under the working condition that specific liquid level values are not required to be reacted, such as high-low liquid level alarm, liquid level high start and low stop, and the automatic control of the corresponding pump 10 is realized, and the automatic control device is reliable in performance, simple in structure and convenient to maintain.
The technical characteristics form the embodiment of the utility model, have stronger adaptability and implementation effect, and can increase or decrease unnecessary technical characteristics according to actual needs so as to meet the requirements of different situations.
Claims (6)
1. The liquid level detection device is characterized by comprising a fixing frame, a high liquid level metal rod, a public end metal rod and a low liquid level metal rod, wherein the high liquid level metal rod, the public end metal rod and the low liquid level metal rod are respectively fixed on the fixing frame and are electrically insulated from the fixing frame; the high liquid level metal pole, the one end of public end metal pole and low liquid level metal pole all are connected with binding post, and the other end is the free end, and wherein, the height of the free end of high liquid level metal pole is higher than the height of the free end of low liquid level metal pole, and the height of the free end of low liquid level metal pole is higher than the height of the free end of public end metal pole.
2. The liquid level detection device for raw coal washery according to claim 1, wherein three insulating sleeves are fixedly arranged on the fixing frame, and the high-liquid-level metal rod, the public-end metal rod and the low-liquid-level metal rod are respectively penetrated inside the insulating sleeves.
3. The liquid level detection device for raw coal washery according to claim 2, wherein a fixing clip is arranged on the fixing frame, and the insulating sleeve is fixedly connected with the fixing frame through the fixing clip.
4. A liquid level detection system applied to a raw coal washery, characterized by comprising a DCS and the liquid level detection device applied to the raw coal washery as claimed in any one of claims 1 to 3, wherein the liquid level detection device applied to the raw coal washery is electrically connected with the DCS.
5. The liquid level detection system for raw coal washout plants according to claim 4, wherein the DCS is provided with at least two sets of digital signal input interfaces, one set of digital signal input interfaces connecting a high liquid level metal rod with a common end metal rod, and the other set of digital signal input interfaces connecting a low liquid level metal rod with a common end metal rod.
6. The liquid level detection system for raw coal washery as in claim 4 or 5, further comprising a machine pump electrically connected to the DCS.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320395130.4U CN219178666U (en) | 2023-03-06 | 2023-03-06 | Liquid level detection device and system applied to raw coal washing and dressing plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320395130.4U CN219178666U (en) | 2023-03-06 | 2023-03-06 | Liquid level detection device and system applied to raw coal washing and dressing plant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219178666U true CN219178666U (en) | 2023-06-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320395130.4U Active CN219178666U (en) | 2023-03-06 | 2023-03-06 | Liquid level detection device and system applied to raw coal washing and dressing plant |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219178666U (en) |
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2023
- 2023-03-06 CN CN202320395130.4U patent/CN219178666U/en active Active
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