CN110820916A - Automatic drainage system for shallow accumulated water in cable trench - Google Patents
Automatic drainage system for shallow accumulated water in cable trench Download PDFInfo
- Publication number
- CN110820916A CN110820916A CN201910963453.7A CN201910963453A CN110820916A CN 110820916 A CN110820916 A CN 110820916A CN 201910963453 A CN201910963453 A CN 201910963453A CN 110820916 A CN110820916 A CN 110820916A
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- liquid level
- water
- normally open
- cable trench
- level switch
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 173
- 239000007788 liquid Substances 0.000 claims abstract description 96
- 239000010865 sewage Substances 0.000 claims description 10
- 239000002184 metal Substances 0.000 description 3
- 239000000523 sample Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 235000014676 Phragmites communis Nutrition 0.000 description 1
- 208000034699 Vitreous floaters Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F5/00—Sewerage structures
- E03F5/22—Adaptations of pumping plants for lifting sewage
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/06—Control using electricity
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- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Public Health (AREA)
- Water Supply & Treatment (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Positive-Displacement Pumps (AREA)
- Control Of Non-Positive-Displacement Pumps (AREA)
Abstract
The invention relates to an automatic drainage system for shallow accumulated water in a cable trench, which comprises a liquid level switch, a control circuit, a direct-current power supply, a water pump M and an alternating-current power supply, wherein the liquid level switch is connected with the control circuit; the water pump M is arranged in the cable trench and is connected with an alternating current power supply through a control circuit to form a main loop of the water pump; the direct current power supply provides direct current for the liquid level switch and the control circuit; the liquid level switch is arranged in the cable trench, and the height of the liquid level switch from the bottom surface of the cable trench is equal to the position of a water level to be controlled, so that the liquid level of shallow accumulated water in the cable trench is monitored; when the liquid level in the cable trench reaches the position of the liquid level switch, the liquid level switch sends a signal to the control circuit, and the control circuit controls the water pump M. The system can effectively discharge shallow accumulated water in the cable trench; meanwhile, the invention also provides a novel control circuit for starting the water pump at a high water level and stopping the water pump at a low water level.
Description
Technical Field
The invention relates to the field of drainage, in particular to an automatic drainage system for shallow accumulated water in a cable trench.
Background
Every time of heavy rain, cable ditches of power distribution rooms of partial transformer substations and counties can cause water logging, and the safe operation of equipment is seriously threatened. A lot of cable pit ponding are more shallow or do not set up the sump pit during construction (many join in marriage electrical room and establish at burden first floor, if do not build the sump pit originally, because there is the burden second floor under the floor, the later stage also can not dig the sump pit on the floor), lead to shallow ponding discharge difficulty and burn the pump easily.
The main problem of shallow accumulated water treatment of the cable trench lies in the adoption of a water pump and a liquid level switch. For a water pump, a common sewage pump or a common self-sucking pump is generally adopted for draining water at present. For a liquid level switch, in order to meet the requirement of more accurate control of the water level, a metal probe is mainly adopted as the liquid level switch at present.
At present, no whole set of effective scheme is available for shallow accumulated water in cable trenches of transformer substations and power distribution rooms. The shallow accumulated water in the cable trench cannot be effectively discharged, and the water pump is burnt out.
The common sewage pump can not effectively discharge shallow water and is often burnt. The common self-priming pump can well discharge shallow water but is easy to damage impeller blades by sewage.
The metal probe is used as a liquid level switch, although the liquid level can be accurately controlled. However, after a long time, scale is liable to adhere to the surface of the metal probe, which affects the sensitivity and reliability of the automatic apparatus.
Disclosure of Invention
The invention provides an automatic drainage system for shallow accumulated water in a cable trench, aiming at overcoming the defect of difficulty in draining the shallow accumulated water in the cable trench in the prior art.
The system comprises a liquid level switch, a control circuit, a direct-current power supply, a water pump M and an alternating-current power supply;
the water pump M is arranged in the cable trench and is connected with an alternating current power supply through a control circuit to form a main loop of the water pump; the direct current power supply provides direct current for the liquid level switch and the control circuit; the liquid level switch is arranged in the cable trench, and the height of the liquid level switch from the bottom surface of the cable trench is equal to the position of a water level to be controlled, so that the liquid level of shallow accumulated water in the cable trench is monitored;
when the liquid level in the cable trench reaches the position of the liquid level switch, the liquid level switch sends a signal to the control circuit, and the control circuit controls the water pump M.
Preferably, an air switch QF is further arranged between the water pump M and the alternating current power supply. The control circuit can control the water pump M to be started and stopped only under the condition that the air switch QF is closed, and when the air switch QF is disconnected, the water pump M is always in a stopped state and cannot be started.
Preferably, the liquid level switch comprises two liquid level switches, namely a low liquid level switch S1 and a high liquid level switch S2; the low water level liquid level switch S1 and the high water level liquid level switch S2 are respectively connected with the control circuit; the low water level liquid level switch S1 and the high water level liquid level switch S2 are arranged in the cable trench, and the height of the low water level liquid level switch S1 is lower than that of the high water level liquid level switch S2; the low water level liquid level switch S1 outputs a normally open auxiliary contact S1-1, when the water level reaches the low water level liquid level switch S1, the normally open auxiliary contact S1-1 is closed; the high level liquid switch S2 outputs a normally open auxiliary contact S2-1, and when the water level reaches the high level liquid switch S2, the normally open auxiliary contact S2-1 is closed.
Only one liquid level switch is arranged, and the water pump can be started and stopped frequently. The water pump can be started at a high water level by respectively arranging the low water level liquid level switch and the high water level liquid level switch, and the low water level stops, so that the frequent starting and stopping of the water pump are avoided.
Preferably, the control circuit comprises an intermediate relay J1, a normally open contact J1-1 and a normally open contact J1-2 output by the intermediate relay J1, a normally open auxiliary contact S1-1 and a normally open auxiliary contact S2-1;
a normally open contact J1-2 of the intermediate relay J1 is connected into a main loop of the water pump, and a control circuit controls the on-off and the on-off of the normally open contact J1-2 to realize the on-off or the conduction of the main loop of the water pump;
one end of a normally open contact S1-1 is connected with a direct current power supply, the other end of the normally open contact S1-1 is connected with one end of a normally open contact J1-1, and the other end of the normally open contact J1-1 is connected with one end of an intermediate relay J1 and one end of a normally open contact S2-1 respectively;
the other end of the intermediate relay J1 is connected with the negative pole of the direct-current power supply;
the other end of the normally open contact S2-1 is connected with the positive pole of the direct current power supply.
Preferably, the main loop of the water pump is specifically as follows: one end of the water pump M is connected with one end of a normally open contact J1-2, and the other end of the normally open contact J1-2 is connected with the L end of the alternating current power supply; the other end of the water pump M is connected with the N end of the alternating current power supply.
The control circuit has a self-holding function, and ensures that the intermediate relay J1 does not lose power when the water level is reduced from the position of the high water level switch S2 to the position lower than the position of the high water level switch S2 and simultaneously higher than the position of the low water level switch S1, so that the water pump M is ensured to continuously operate, and high water level starting and low water level stopping are realized.
Preferably, the water pump M is a low-level sewage pump. The low-water-level sewage pump is not influenced by water level, is suitable for discharging shallow accumulated water and is free from being burnt
Preferably, the liquid level switch is an electronic liquid level switch. The electronic water level switch has high stability and is super durable. The floating ball and the reed switch are not needed, no mechanical action is needed outside, the liquid can act after being soaked to the corresponding position of the water level switch, the pollution resistance and the durability are realized, the influence of floaters is avoided, the installation at any angle is suitable for being soaked in water for a long time, and the shell is made of plastic and is corrosion-resistant. And when the water is judged, the built-in relay is closed, and when the water is not judged, the built-in relay is opened.
Compared with the prior art, the technical scheme of the invention has the beneficial effects that: the system can effectively discharge shallow accumulated water in the cable trench; in addition, the invention adopts the innovative combination design of the electronic water level switch and the relay control circuit, is not influenced by water scale, has high reliability, high sensitivity and super durability, and can accurately control the water level. Shallow water is treated by adopting a novel sewage pump matched with a novel electronic water level switch, and the problem can be well solved no matter the accumulated water in the cable trench is sewage, clear water, shallow water or deep water. Meanwhile, the invention provides a new control circuit for realizing the functions of starting the water pump at a high water level and stopping the water pump at a low water level.
Drawings
Fig. 1 is a schematic view of an automatic drainage system for shallow accumulated water in a cable trench according to embodiment 1.
Fig. 2 is a layout view of the liquid level switch.
Fig. 3 is a control loop diagram of an automatic drainage system for shallow water in a cable trench.
Fig. 4 is a schematic diagram of the main circuit of the water pump.
In the figure, S1 is a low water level liquid level switch, S2 is a high water level liquid level switch, S1-1 is a normally open auxiliary contact output by the low water level liquid level switch S1, S2-1 is a normally open auxiliary contact output by the high water level liquid level switch S2, J1 is an intermediate relay, J1-2 and J1-2 are normally open auxiliary contacts output by the intermediate relay J1, and M is a water pump.
Detailed Description
The drawings are for illustrative purposes only and are not to be construed as limiting the patent;
for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product;
it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The technical solution of the present invention is further described below with reference to the accompanying drawings and examples.
Example 1
The embodiment provides an automatic drainage system for shallow water in a cable trench, and as shown in fig. 1, the system comprises a liquid level switch, a control circuit, a direct-current power supply, a water pump M and an alternating-current power supply;
the water pump M is arranged in the cable trench and is connected with an alternating current power supply through a control circuit to form a main loop of the water pump; the direct current power supply provides direct current for the liquid level switch and the control circuit; the liquid level switch is arranged in the cable trench, and the height of the liquid level switch from the bottom surface of the cable trench is equal to the position of a water level to be controlled, so that the liquid level of shallow accumulated water in the cable trench is monitored;
when the liquid level in the cable trench reaches the position of the liquid level switch, the liquid level switch sends a signal to the control circuit, and the control circuit controls the water pump M.
An air switch QF is also arranged between the water pump M and the alternating current power supply.
The liquid level switches comprise two liquid level switches, namely a low liquid level switch S1 and a high liquid level switch S2;
the low water level liquid level switch S1 and the high water level liquid level switch S2 are respectively connected with the control circuit;
the low water level liquid level switch S1 and the high water level liquid level switch S2 are arranged in the cable trench, and the height of the low water level liquid level switch S1 is lower than that of the high water level liquid level switch S2; as shown in fig. 2.
The low water level liquid level switch S1 outputs a normally open auxiliary contact S1-1, when the water level reaches the low water level liquid level switch S1, the normally open auxiliary contact S1-1 is closed; the high level liquid switch S2 outputs a normally open auxiliary contact S2-1, and when the water level reaches the high level liquid switch S2, the normally open auxiliary contact S2-1 is closed.
As shown in FIG. 3, the control circuit comprises an intermediate relay J1, a normally open contact J1-1 and a normally open contact J1-2 output by the intermediate relay J1, a normally open auxiliary contact S1-1 and a normally open auxiliary contact S2-1;
a normally open contact J1-2 of the intermediate relay J1 is connected into a main loop of the water pump, and a control circuit controls the on-off and the on-off of the normally open contact J1-2 to realize the on-off or the conduction of the main loop of the water pump;
one end of a normally open contact S1-1 is connected with a direct current power supply, the other end of the normally open contact S1-1 is connected with one end of a normally open contact J1-1, and the other end of the normally open contact J1-1 is connected with one end of an intermediate relay J1 and one end of a normally open contact S2-1 respectively;
the other end of the intermediate relay J1 is connected with the negative pole of the direct-current power supply;
the other end of the normally open contact S2-1 is connected with the positive pole of the direct current power supply.
As shown in fig. 4, the main circuit of the water pump is specifically as follows: one end of the water pump M is connected with one end of a normally open contact J1-2, and the other end of the normally open contact J1-2 is connected with the L end (namely the fire wire end) of the alternating current power supply; the other end of the water pump M is connected with the N (namely the zero line end) end of the alternating current power supply.
The water pump M is a low-water-level sewage pump with the model number of QDN. The low-water-level sewage pump is not influenced by water level, is suitable for discharging shallow accumulated water and is free from a burning machine.
The liquid level switch is an electronic liquid level switch, and the model is BZ 2402.
The direct current power supply is a DC24V power supply.
When the water pump is used, when the water level rises to the low water level liquid level switch, the S1-1 is closed, water continues to rise to the high water level liquid level switch, the S2-1 is closed, the intermediate relay J1 is powered on, the J1-1 and the J1-2 are closed, and the water pump M is powered on to operate. Along with the operation of the water pump, the water level starts to gradually decrease, when the water level is lower than the high water level liquid level switch, S2-1 is disconnected, but J1 is continuously powered on until the water level is lower than the low water level liquid level switch, S1-1 is disconnected, J1 is powered off, J1-1 and J1-2 are disconnected, and the water pump M is powered off and stops operation. Realize the high water level of water pump and start, the low water level stops, avoids the water pump to open frequently and stops.
The terms describing positional relationships in the drawings are for illustrative purposes only and are not to be construed as limiting the patent;
it should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (7)
1. The automatic drainage system for shallow accumulated water in a cable trench is characterized by comprising a liquid level switch, a control circuit, a direct-current power supply, a water pump M and an alternating-current power supply;
the water pump M is arranged in the cable trench and is connected with an alternating current power supply through a control circuit to form a main loop of the water pump; the direct current power supply provides direct current for the liquid level switch and the control circuit; the liquid level switch is arranged in the cable trench, and the height of the liquid level switch from the bottom surface of the cable trench is equal to the position of a water level to be controlled, so that the liquid level of shallow accumulated water in the cable trench is monitored;
when the liquid level in the cable trench reaches the position of the liquid level switch, the liquid level switch sends a signal to the control circuit, and the control circuit controls the water pump M.
2. The automatic drainage system for shallow accumulated water in a cable trench according to claim 1, wherein an air switch QF is further arranged between the water pump M and the alternating current power supply.
3. The automatic drainage system for shallow accumulated water in a cable trench according to claim 1, wherein the liquid level switches comprise two low-water level switches S1 and two high-water level switches S2;
the low water level liquid level switch S1 and the high water level liquid level switch S2 are respectively connected with the control circuit;
the low water level liquid level switch S1 and the high water level liquid level switch S2 are arranged in the cable trench, and the height of the low water level liquid level switch S1 is lower than that of the high water level liquid level switch S2;
the low water level liquid level switch S1 outputs a normally open auxiliary contact S1-1, when the water level reaches the low water level liquid level switch S1, the normally open auxiliary contact S1-1 is closed; the high level liquid switch S2 outputs a normally open auxiliary contact S2-1, and when the water level reaches the high level liquid switch S2, the normally open auxiliary contact S2-1 is closed.
4. The automatic drainage system for shallow ponding in a cable trench according to claim 3, wherein the control circuit comprises an intermediate relay J1, a normally open contact J1-1 and a normally open contact J1-2 output by the intermediate relay J1, a normally open auxiliary contact S1-1 and a normally open auxiliary contact S2-1;
a normally open contact J1-2 of the intermediate relay J1 is connected into a main loop of the water pump, and a control circuit controls the on-off and the on-off of the normally open contact J1-2 to realize the on-off or the conduction of the main loop of the water pump;
one end of a normally open contact S1-1 is connected with a direct current power supply, the other end of the normally open contact S1-1 is connected with one end of a normally open contact J1-1, and the other end of the normally open contact J1-1 is connected with one end of an intermediate relay J1 and one end of a normally open contact S2-1 respectively;
the other end of the intermediate relay J1 is connected with the negative pole of the direct-current power supply;
the other end of the normally open contact S2-1 is connected with the positive pole of the direct current power supply.
5. The automatic drainage system for shallow accumulated water in a cable trench according to claim 4, wherein a main loop of the water pump specifically comprises: one end of the water pump M is connected with one end of a normally open contact J1-2, and the other end of the normally open contact J1-2 is connected with the L end of the alternating current power supply; the other end of the water pump M is connected with the N end of the alternating current power supply.
6. The automatic shallow water drainage system for the cable trench as claimed in any one of claims 1 to 5, wherein the water pump M is a low-level sewage pump.
7. The automatic drainage system for shallow water in a cable trench according to any one of claims 1 to 5, wherein the liquid level switch is an electronic liquid level switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910963453.7A CN110820916A (en) | 2019-10-11 | 2019-10-11 | Automatic drainage system for shallow accumulated water in cable trench |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910963453.7A CN110820916A (en) | 2019-10-11 | 2019-10-11 | Automatic drainage system for shallow accumulated water in cable trench |
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| Publication Number | Publication Date |
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| CN110820916A true CN110820916A (en) | 2020-02-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910963453.7A Pending CN110820916A (en) | 2019-10-11 | 2019-10-11 | Automatic drainage system for shallow accumulated water in cable trench |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113089700A (en) * | 2021-04-12 | 2021-07-09 | 国网山东省电力公司昌邑市供电公司 | Automatic drainage system for accumulated water in cable trench |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204009597U (en) * | 2014-09-04 | 2014-12-10 | 国家电网公司 | The self-draining arrangement of cable duct |
| CN109343584A (en) * | 2018-10-12 | 2019-02-15 | 广东电网有限责任公司 | A kind of full-automatic water logging alarm of cable shaft and drain control unit |
| CN211007008U (en) * | 2019-10-11 | 2020-07-14 | 广东电网有限责任公司 | Automatic drainage system for shallow accumulated water in cable trench |
-
2019
- 2019-10-11 CN CN201910963453.7A patent/CN110820916A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204009597U (en) * | 2014-09-04 | 2014-12-10 | 国家电网公司 | The self-draining arrangement of cable duct |
| CN109343584A (en) * | 2018-10-12 | 2019-02-15 | 广东电网有限责任公司 | A kind of full-automatic water logging alarm of cable shaft and drain control unit |
| CN211007008U (en) * | 2019-10-11 | 2020-07-14 | 广东电网有限责任公司 | Automatic drainage system for shallow accumulated water in cable trench |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113089700A (en) * | 2021-04-12 | 2021-07-09 | 国网山东省电力公司昌邑市供电公司 | Automatic drainage system for accumulated water in cable trench |
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