CN215566721U - Dry-grinding preventing system of wastewater self-priming pump - Google Patents
Dry-grinding preventing system of wastewater self-priming pump Download PDFInfo
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- CN215566721U CN215566721U CN202122251068.5U CN202122251068U CN215566721U CN 215566721 U CN215566721 U CN 215566721U CN 202122251068 U CN202122251068 U CN 202122251068U CN 215566721 U CN215566721 U CN 215566721U
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Abstract
The utility model belongs to the technical field of waste treatment and specifically relates to a waste water self priming pump prevents dry grinding system, and it includes: the pressure acquisition module is used for acquiring the pressure of the water outlet end of the self-priming pump when the self-priming pump operates and outputting a pressure detection signal; and the control module is connected to the pressure acquisition module, receives the control signal and compares the control signal with a preset pressure value Vref, and can output an abnormal signal to control the self-priming pump to stop when the pressure detection signal is smaller than the preset pressure signal. This application can reduce the time that self priming pump moved under the dry grinding state.
Description
Technical Field
The application relates to the field of waste treatment, in particular to an anti-dry grinding system of a wastewater self-sucking pump.
Background
At present, in the process of wastewater treatment, the wastewater is generally transferred to a wastewater station through a transfer tank by a self-priming pump, and then the wastewater is subjected to centralized treatment; in order to prevent the liquid entering the water pump from flowing backwards, a bottom valve is connected to the water inlet of the water pump, and the bottom valve functions as a check valve.
However, the pH value of the wastewater is not constant, and the temperature is usually higher than the room temperature, so that the service life of a bottom pumping valve in a drainage system is not long, and air enters a water pump due to the failure of the bottom pumping valve.
If there is the air in the intraductal in the frequent start-up water pump in-process, will cause the water pump dry grinding, if do not discover the water pump for a long time and run at the dry grinding state, then lead to the machine to seal easily and leak or even the pump body damages.
SUMMERY OF THE UTILITY MODEL
In order to reduce the time that self priming pump moved under the dry grinding state, this application provides a waste water self priming pump prevents dry grinding system.
The application provides a pair of waste water self priming pump prevent dry grinding system adopts following technical scheme:
an anti-dry grinding system of a waste water self-priming pump, comprising:
the pressure acquisition module is used for acquiring the pressure of the water outlet end of the self-priming pump when the self-priming pump operates and outputting a pressure detection signal;
and the control module is connected to the pressure acquisition module, receives the control signal and compares the control signal with a preset pressure value Vref, and can output an abnormal signal to control the self-priming pump to stop when the pressure detection signal is smaller than the preset pressure signal.
Through adopting above-mentioned technical scheme, when the pressure of the liquid outlet of self priming pump is greater than preset pressure value Vref, explain that the self priming pump is in normal operating condition, explain when the pressure of the liquid outlet of self priming pump is less than preset pressure value Vref that the self priming pump is in the dry grinding state, at this moment, control module can control the self priming pump and stop, has reduced its operating time under the dry grinding state, has promoted the life of self priming pump.
Optionally, the output end of the control module is connected with a delay relay KM1, and the delay relay KM1 responds to the abnormal signal and gets power after a preset time; and a coil of the time delay relay KM1 is connected to the control module, and a normally closed contact of the time delay relay KM1 is connected in series in a power supply loop of the self-priming pump.
By adopting the technical scheme, when the control module generates an abnormal signal, the time relay KM1 is electrified and conducted in a preset time, the normally closed contact is disconnected, and the self-priming pump stops running; the measuring pressure of pressure acquisition module can have certain fluctuation, and when the measured value of pressure acquisition module was temporarily less than preset pressure value Vref, because time relay KM 1's existence, can carry out the time delay of a period, reduced the probability that the self priming pump stopped immediately, reduced the probability that the self priming pump frequently started and stopped.
Optionally, a waste water self priming pump prevent dry grinding system still includes warning module, connects in control module, warns in response to abnormal signal.
Through adopting above-mentioned technical scheme, when the self priming pump is in the dry grinding state, control module can control warning module and warn the staff to improve the probability that the staff discovers the self priming pump trouble.
Optionally, the dry-abrasion prevention system of the wastewater self-priming pump further comprises a counting module connected to the control module and used for counting the occurrence frequency of the abnormal signal.
Through adopting above-mentioned technical scheme, technical module can make statistics of the number of times that the self priming pump appears dry-grinding in the course of the work, and the staff of being convenient for carries out record and analysis.
Optionally, the dry-abrasion prevention system of the wastewater self-priming pump further comprises an auxiliary pipeline connected with the bottom valve connected with the liquid inlet of the self-priming pump in parallel, and the auxiliary pipeline is communicated with an electromagnetic valve.
Through adopting above-mentioned technical scheme, before starting the self priming pump, can reduce the persistence of the inlet department air of self priming pump through the inlet department injection liquid of solenoid valve to the self priming pump, reduce the probability that the self priming pump got into the dry grinding state.
Optionally, the electromagnetic valve is a one-way valve, and a liquid outlet of the electromagnetic valve is communicated with a liquid inlet of the self-priming pump.
Through adopting above-mentioned technical scheme, the liquid outlet of check valve and the inlet intercommunication of self priming pump for liquid can only be from outside to the inlet department circulation of self priming pump, has reduced the probability of liquid backward flow, can further reduce the gas residue of self priming pump inlet department.
Optionally, the warning module includes a warning light H, and a normally open contact KM1-2 of the time relay KM1 is connected in series in a power supply loop of the warning light.
By adopting the technical scheme, when the coil of the time relay KM1 is electrified, the normally open contact KM1-2 is closed, and the warning lamp H is lightened.
In summary, the present application includes at least one of the following beneficial technical effects:
1. when the pressure of the liquid outlet of the self-sucking pump is greater than the preset pressure value Vref, the self-sucking pump is in a normal working state, and when the pressure of the liquid outlet of the self-sucking pump is less than the preset pressure value Vref, the self-sucking pump is in a dry grinding state, at the moment, the control module can control the self-sucking pump to stop, the running time of the self-sucking pump in the dry grinding state is reduced, and the service life of the self-sucking pump is prolonged;
2. when the control module generates an abnormal signal, the time relay KM1 is electrified and conducted in the preset time, the normally closed contact is disconnected, and the self-priming pump stops running; when the measured value of the pressure acquisition module is temporarily smaller than the preset pressure value Vref, time delay can be carried out for a period of time due to the existence of the time relay KM1, the probability of immediate stop of the self-priming pump is reduced, and the probability of frequent start and stop of the self-priming pump is reduced;
3. the liquid outlet of check valve and the inlet intercommunication of self priming pump for liquid can only be from outside to the inlet department circulation of self priming pump, has reduced the probability of liquid backward flow, can further reduce the gas residue of self priming pump inlet department.
Drawings
FIG. 1 is a schematic diagram illustrating a connection relationship between modules in an embodiment of the present application;
fig. 2 is a schematic diagram of the connection of the auxiliary pipe in the embodiment of the present application.
Description of reference numerals: 1. a pressure detection module; 2. a control module; 3. a warning module; 4. a counting module; 5. an auxiliary conduit.
Detailed Description
The present application is described in further detail below with reference to figures 1-2.
The embodiment of the application discloses waste water self priming pump prevents dry grinding system, refers to FIG. 1, and it includes pressure acquisition module, control module 2, warning module 3 and count module 4. Wherein, when the self priming pump operation, pressure acquisition module can detect the pressure and output pressure detection signal to control module 2 that self priming pump goes out the liquid end, and when pressure detection signal was less than preset pressure value Vref, control module 2 output abnormal signal stopped with control self priming pump, reduced the time that self priming pump got into the dry grinding state.
Referring to fig. 1, further, the pressure collecting module includes a pressure sensor P1, an amplifying circuit and an a/D converter, wherein an output terminal of the pressure sensor P1 is connected to the amplifying circuit, and an output terminal of the amplifying circuit is connected to an input terminal of the a/D converter. The control module 2 is a PLC controller, the output end of the A/D converter is connected to the input end of the PLC controller, and the output signal of the pressure sensor P1 is amplified by the amplifying circuit and then is converted into a digital signal by the A/D converter and then is input into the PLC controller.
Referring to fig. 1, further, a time relay KM1 is connected between the PLC controller and the self-priming pump, one end of a coil of the time relay KM1 is connected to the output end of the PLC controller, the other end of the coil of the time relay KM1 is grounded, and a normally closed contact KM1-1 of the time relay is connected in series in a power supply loop of the self-priming pump. When the self priming pump is in the dry grinding state, the pressure of its liquid outlet end is 0, because of the detection signal of AD converter output PLC controller can be less than preset pressure value Vref, consequently, PLC controller can output abnormal signal this moment, PLC controller's output can output voltage promptly, time relay KM 1's coil can be got after the time of predetermineeing, time relay KM 1's coil gets after the electricity, normally closed contact KM1-1 breaks off, the power supply circuit disconnection of self priming pump, self priming pump stop work.
When the pressure of pressure sensor P1's detection appeared undulant, the actual self priming pump did not get into the dry grinding state, consequently stops the self priming pump again after time relay KM 1's time delay, can reduce the probability that the self priming pump that leads to because of detection error stops, has reduced the frequent start-stop's of self priming pump condition and has appeared.
Referring to fig. 1, further, count module 4 is electronic counter, and electronic counter connects in the output of PLC controller, and electronic counter can make statistics of the number of times that PLC controller abnormal signal appears to the operating condition of staff to self priming pump carries out record and analysis.
Referring to fig. 1, further, the warning module 3 includes a warning lamp H, wherein the normally open contact KM1-2 of the time relay KM1 is connected in series in the power supply loop of the warning lamp H, after the coil of the time relay KM1 is energized, the power supply loop of the warning lamp H is turned on, and the warning lamp H is lit to prompt the staff.
Referring to fig. 1 and 2, further, in order to empty the air of self priming pump inlet department before the self priming pump starts, the inlet end of self priming pump still is provided with auxiliary pipeline 5 parallelly connected with the bottom valve, is connected with the solenoid valve on the auxiliary pipeline 5, and the solenoid valve is the check valve, the liquid outlet of solenoid valve and the inlet intercommunication of self priming pump. Before starting the self priming pump, earlier make the air department of self priming pump inlet department discharge to the inlet port of self priming pump in the injection liquid of solenoid valve, then restart the self priming pump, reduced the probability in the air admission self priming pump, reduced the probability that the self priming pump got into the dry grinding state.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (7)
1. The utility model provides a waste water self priming pump prevent dry grinding system which characterized in that includes:
the pressure acquisition module is used for acquiring the pressure of the water outlet end of the self-priming pump when the self-priming pump operates and outputting a pressure detection signal;
and the control module (2) is connected to the pressure acquisition module, receives the control signal and compares the control signal with a preset pressure value Vref, and can output an abnormal signal to control the self-priming pump to stop when the pressure detection signal is smaller than the preset pressure signal.
2. The dry abrasion prevention system for a wastewater self-primer pump of claim 1, wherein: the output end of the control module (2) is connected with a time delay relay KM1, and the time delay relay KM1 responds to an abnormal signal and gets electricity after preset time; and a coil of the time delay relay KM1 is connected to the control module (2), and a normally closed contact of the time delay relay KM1 is connected in series in a power supply loop of the self-priming pump.
3. The dry abrasion prevention system for a wastewater self-primer pump of claim 2, wherein: the alarm device is characterized by further comprising an alarm module (3) which is connected to the control module (2) and responds to the abnormal signal to alarm.
4. The dry abrasion prevention system for a wastewater self-primer pump of claim 1, wherein: the device also comprises a counting module (4) which is connected with the control module (2) and used for counting the frequency of the abnormal signals.
5. The dry abrasion prevention system for a wastewater self-primer pump of claim 1, wherein: the self-priming pump is characterized by further comprising an auxiliary pipeline (5) which is connected with a bottom valve connected with a liquid inlet of the self-priming pump in parallel, wherein the auxiliary pipeline (5) is communicated with an electromagnetic valve.
6. The dry abrasion prevention system for a wastewater self-primer pump of claim 5, wherein: the electromagnetic valve is a one-way valve, and a liquid outlet of the electromagnetic valve is communicated with a liquid inlet of the self-priming pump.
7. The dry abrasion prevention system for a wastewater self-primer pump of claim 3, wherein: the warning module (3) comprises a warning lamp H, and a normally open contact KM1-2 of the time relay KM1 is connected in series in a power supply loop of the warning lamp H.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122251068.5U CN215566721U (en) | 2021-09-14 | 2021-09-14 | Dry-grinding preventing system of wastewater self-priming pump |
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| CN202122251068.5U CN215566721U (en) | 2021-09-14 | 2021-09-14 | Dry-grinding preventing system of wastewater self-priming pump |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113759994A (en) * | 2021-09-17 | 2021-12-07 | 北京润泰环保科技有限公司 | Method for reducing dry grinding of self-priming pump and self-priming pump control system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113759994A (en) * | 2021-09-17 | 2021-12-07 | 北京润泰环保科技有限公司 | Method for reducing dry grinding of self-priming pump and self-priming pump control system |
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