CN217632870U - Coal slime pond pumping system with monitoring function - Google Patents
Coal slime pond pumping system with monitoring function Download PDFInfo
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- CN217632870U CN217632870U CN202221668121.XU CN202221668121U CN217632870U CN 217632870 U CN217632870 U CN 217632870U CN 202221668121 U CN202221668121 U CN 202221668121U CN 217632870 U CN217632870 U CN 217632870U
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Abstract
The utility model discloses a coal slime pond pumping system with monitoring function, which comprises a coal slime sweeping pump arranged at the bottom of the coal slime pond, and two low liquid level float switches and two high liquid level float switches arranged on the coal slime pond; normally open contacts of the two low liquid level float switches and the two high liquid level float switches are respectively connected in parallel and then are connected in series with a coil of the contactor to form a closed loop; the normally open contact of the contactor is connected in parallel with the normally open contacts of the two high liquid level float switches; normally closed contacts of the two low liquid level float switches are respectively connected with the two indicating lamps in series and then connected with normally open contacts of the two low liquid level float switches in series; the normally closed contacts of the two high liquid level float switches are respectively connected with the two indicating lamps in series and then connected with the normally open contacts of the two high liquid level float switches in series. This scheme is through installing 2 floater level switch additional again to the coal slime pond, carries out reasonable electrical design, and is simple and convenient, and low cost has guaranteed the stability of production, and it is convenient to seek the trouble, and economic benefits is good.
Description
The technical field is as follows:
the utility model relates to a conveying system especially relates to a coal slime pond pumping system with monitoring function.
Background art:
most of coal slime sweeping pumps P of coal washery are controlled by additionally arranging a floating ball liquid level switch in a coal slime pool, starting the pump by adopting a high liquid level and stopping the pump by adopting a low liquid level. When the float switch is in fault, such as when the high-liquid-level float switch is in fault, the coal slime sweeping pump P cannot be started, and the coal slime pool overflows; overflow indicates two situations (at least one of the high level float switch and the low level float switch is damaged, or both are damaged). When the coal slime sweeping pump reaches a low liquid level, if the low liquid level float switch is damaged or the auxiliary contact of the contactor KM is damaged, the coal slime sweeping pump P cannot stop, so that the pump body is damaged due to idling of the pump, a fault point is difficult to find, the production is seriously influenced due to frequent accidents, manpower and financial resources are wasted, and the cost is high.
The utility model has the following contents:
based on the above reason, the utility model aims to provide a coal slime pond pumping system with monitoring function.
The utility model discloses implement by following technical scheme: a pumping system with a monitoring function for a coal slime pool comprises a coal slime sweeping pump arranged at the bottom of the coal slime pool, two low liquid level float switches arranged at the lower part of the coal slime pool and two high liquid level float switches arranged at the upper part of the coal slime pool;
normally open contacts of the two low liquid level float switches and the two high liquid level float switches are respectively connected in parallel and then are connected in series with a coil of the contactor to form a closed loop; the normally open contact of the contactor is connected in parallel with the normally open contacts of the two high liquid level float switches;
the normally closed contacts of the two low liquid level float switches are respectively connected with the two indicating lamps in series and then connected with the normally open contacts of the two low liquid level float switches in series; the normally closed contacts of the two high liquid level float switches are respectively connected with the two indicating lamps in series and then connected with the normally open contacts of the two high liquid level float switches in series.
Further, it still includes time relay, time relay's time delay disconnection normally closed contact establishes ties with the coil of contactor, time relay's after the series connection time delay disconnection normally closed contact and the coil of contactor with time relay's coil is parallelly connected.
Further, the thermal relay is connected in series in the closed loop.
Further, the air switch is connected in series in the closed loop.
The utility model has the advantages that: the utility model provides a be a coal slime pond pumping system with monitoring function, through installing 2 floater liquid level switches additional to the coal slime pond again, carry out reasonable electrical design, realize simple and convenient, low cost has guaranteed the stability of production on the one hand, and on the other hand looks for the trouble convenient, and economic benefits is good.
Description of the drawings:
in order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the description below are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of a conventional coal slurry transport pond pumping system of example 1;
FIG. 2 is a circuit diagram of embodiment 1;
FIG. 3 is a schematic view of a pumping system of an improved coal slurry conveying pond in the embodiment 2;
fig. 4 is a circuit diagram of embodiment 2.
The specific implementation mode is as follows:
the technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Description of the drawings: the intact float switch means that the function can be normally realized along with the change of the liquid level; the damage (fault) of the float switch means that the function can not be realized along with the change of the liquid level, and the float switch always keeps one state (the normally open point is always in the off state, and the normally closed point is always in the on state)
Example 1
The present embodiment is a conventional pumping system for a coal slurry conveying pond, as shown in fig. 1, and includes a coal slurry sweeping pump P disposed at the bottom of the coal slurry pond, a high liquid level float switch a and a low liquid level float switch B disposed in the coal slurry pond,
as shown in fig. 2, the circuit of the pumping system is: the high liquid level float switch A, the low liquid level float switch B and a coil of the contactor KM are connected in series to form a closed loop, the normally open contact of the contactor KM is connected with the normally open contact of the high liquid level float switch A in parallel, and the power on and off of a motor of the coal slime sweeping pump are controlled by the circuit.
The working process is as follows: when the liquid level of the coal slime pool is higher than the low liquid level, a floating ball of a low liquid level floating ball switch B floats upwards, and a normally open point is closed; when the high liquid level is reached, the floating ball of the high liquid level floating ball switch A floats upwards, and the normally open point is closed; the closed loop is conducted, the coil of the contactor KM is electrified, and the normally open contact of the contactor KM is electrified and self-locked; and meanwhile, the coal slime sweeping pump P starts to operate, when the liquid level is lower than the low liquid level, a floating ball of a low liquid level floating ball switch B sinks, a normally-open point is changed from a closed state to an open state, a coil of a contactor KM is powered off, a normally-open contact of the contactor KM is disconnected, and the coal slime sweeping pump P stops operating.
When the float switch is in fault, such as the high-liquid-level float switch is in fault, the coal slime sweeping pump P cannot be started, and the coal slime pool overflows; when the low-liquid-level float switch breaks down, the coal slime sweeping pump P cannot stop, so that the pump body is damaged due to idling of the pump, fault points are difficult to find, production is seriously influenced due to frequent accidents, manpower and financial resources are wasted, and the cost is high.
Example 2
The embodiment is an improved pumping system, as shown in fig. 3, and includes a coal slurry sweeping pump P disposed at the bottom of a coal slurry pool, two low liquid level float switches B and C disposed at the lower part of the coal slurry pool, and two high liquid level float switches a and D disposed at the upper part of the coal slurry pool;
normally open contacts of the two low liquid level float switches B and C and the two high liquid level float switches A and D are respectively connected in parallel and then are connected in series with a coil of the contactor KM to form a closed loop; the normally open contact of the contactor KM is connected with the normally open contacts of the two high liquid level float switches A and D in parallel;
normally closed contacts of the two low liquid level float switches B and C are respectively connected with the two indicating lamps in series and then are connected with normally open contacts of the two low liquid level float switches B and C in series; the normally closed contacts of the two high liquid level float switches A and D are respectively connected with the two indicating lamps in series, and then are connected with the normally open contacts of the two high liquid level float switches A and D in series.
The embodiment further comprises a time relay KT3, a thermal relay FR and an air switch QF, wherein the time delay disconnection normally closed contact of the time relay KT3 is connected with a coil of the contactor KM in series, and the time delay disconnection normally closed contact of the time relay after series connection is connected with the coil of the contactor KM and the coil of the time relay in parallel.
The thermal relay FR and the air switch QF are connected in series in a closed circuit.
The working principle is as follows:
three cases are divided when the liquid level is higher than the low liquid level (and lower than the high liquid level):
1. when the low liquid level float switch B and the low liquid level float switch C are intact: the low liquid level float switches B and C are both in a floating state, the normally open point is in a closed state, the normally closed point is in a disconnected state, and the indicator lights of the low liquid level float switches B and C are not on.
2. Low liquid level float switch B is intact, when low liquid level float switch C damaged: the low liquid level float switches B and C are both in a floating state, the normally open point of the low liquid level float switch B is in a closed state, and the normally closed point is in a disconnected state, so that an indicator light of the low liquid level float switch B is not on; however, the contact state of the low liquid level float switch C is unchanged, the normally open point of the low liquid level float switch B is closed, and the normally closed point of the low liquid level float switch C is also in a closed state, so that an indicator light of the low liquid level float switch C is on.
3. Low liquid level float switch C is intact, and when low liquid level float switch B damaged: low liquid level float switch B, C all are in the come-up state, and low liquid level float switch C normally open point was in the closed state this moment, and the normally closed point is in the off-state, so low liquid level float switch C pilot lamp is not bright, but low liquid level float switch B contact state is unchangeable, and low liquid level float switch C's normally open point is closed, and low liquid level float switch B's normally closed point still is in the closed state, so low liquid level float switch B pilot lamp is bright.
When the low liquid level point is in a closed state, three conditions are divided when the liquid level is higher than the highest liquid level:
1. when high liquid level float switch A, D are all intact: high liquid level float switch A, D all are in the come-up state, and normally open point is in the closure state, and normally closed point is in the off-state, so high liquid level float switch A, D's pilot lamp is all not bright.
2. High liquid level float switch A is intact, and when high liquid level float switch D damaged: the high liquid level float switches A and D are both in a floating state, at the moment, the normally open point of the high liquid level float switch A is in a closed state, and the normally closed point is in a disconnected state, so that the indicator light of the high liquid level float switch A is not on; however, the contact state of the high liquid level float switch D is unchanged, the normally open point of the high liquid level float switch A is closed, and the normally closed point of the high liquid level float switch D is still in a closed state, so that the indicator light of the high liquid level float switch D is on.
3. High liquid level float switch D is intact, and when high liquid level float switch A damaged: the high liquid level float switches A and D are both in a floating state, the normally open point of the high liquid level float switch D is in a closed state at the moment, and the normally closed point is in a disconnected state, so that the indicator light of the high liquid level float switch D is not on; however, the contact state of the high liquid level float switch A is unchanged, the normally open point of the high liquid level float switch D is closed, and the normally closed point of the high liquid level float switch A is still in a closed state, so that the indicator light of the high liquid level float switch A is on.
To summarize:
1. one of the advantages of the scheme is that when one floating ball switch is damaged, production is not affected, which damage can be accurately monitored, and the floating ball switch can be replaced in time. If the two float switches are not replaced in time, the two float switches are damaged, and the phenomenon of overflowing pool occurs.
2. The scheme alarms according to the sequence of the fault of the low liquid level floating ball to the fault of the high liquid level floating ball.
3. And contactor KM parallel time relay KT3 prevents that the pump from idling for a long time, and the time setting can be set up according to actual conditions, generally sweeps the floor pump P and is longer for a while by starting to stop the longest time, in preventing that low liquid level float switch from falling into the coal slime, is in the normal close always (can rise along with the liquid level certainly, can float again).
The above description is only for the preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (4)
1. A pumping system with a monitoring function for a coal slime pool is characterized by comprising a coal slime sweeping pump arranged at the bottom of the coal slime pool, two low liquid level float switches arranged at the lower part of the coal slime pool and two high liquid level float switches arranged at the upper part of the coal slime pool;
normally open contacts of the two low liquid level float switches and the two high liquid level float switches are respectively connected in parallel and then are connected in series with a coil of the contactor to form a closed loop; the normally open contact of the contactor is connected in parallel with the normally open contacts of the two high liquid level float switches;
normally closed contacts of the two low liquid level float switches are respectively connected with the two indicating lamps in series and then connected with normally open contacts of the two low liquid level float switches in series; the normally closed contacts of the two high liquid level float switches are respectively connected with the two indicating lamps in series and then connected with the normally open contacts of the two high liquid level float switches in series.
2. The coal slime pond pumping system with monitoring function as claimed in claim 1, further comprising a time relay, wherein the time-delay opening normally closed contact of the time relay is connected in series with the coil of the contactor, and the time-delay opening normally closed contact of the time relay after the time relay is connected in parallel with the coil of the contactor and the coil of the time relay.
3. The coal mud pit pumping system with monitoring function of claim 1 or 2, characterized in that it further comprises a thermal relay connected in series in the closed loop.
4. The coal mud pit pumping system with monitoring function of claim 1 or 2, characterized in that it further comprises an air switch connected in series in the closed loop.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221668121.XU CN217632870U (en) | 2022-06-29 | 2022-06-29 | Coal slime pond pumping system with monitoring function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221668121.XU CN217632870U (en) | 2022-06-29 | 2022-06-29 | Coal slime pond pumping system with monitoring function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217632870U true CN217632870U (en) | 2022-10-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221668121.XU Active CN217632870U (en) | 2022-06-29 | 2022-06-29 | Coal slime pond pumping system with monitoring function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217632870U (en) |
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2022
- 2022-06-29 CN CN202221668121.XU patent/CN217632870U/en active Active
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