CN216617881U - Anti-dry operation device for pump - Google Patents
Anti-dry operation device for pump Download PDFInfo
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- CN216617881U CN216617881U CN202123076216.0U CN202123076216U CN216617881U CN 216617881 U CN216617881 U CN 216617881U CN 202123076216 U CN202123076216 U CN 202123076216U CN 216617881 U CN216617881 U CN 216617881U
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Abstract
The utility model relates to a pump dry running prevention device which comprises a mounting base, a liquid level sensor, a liquid supplementing electromagnetic valve and an exhaust electromagnetic valve, wherein a flow channel is arranged in the mounting base, one end of the flow channel is communicated with a dry running prevention pump, the other end of the flow channel is communicated with a liquid suction pipeline in front of the dry running prevention pump, and the liquid level sensor, the liquid supplementing electromagnetic valve and the exhaust electromagnetic valve are respectively communicated with the flow channel. The utility model has the advantages that the dry running of the pump can be completely avoided by using the pump dry running prevention device, and the controller can display the liquid level state of the current liquid suction pipe. The automatic control system has the advantages of high automation degree and simplicity in use and maintenance.
Description
Technical Field
The utility model belongs to the technical field of fluid conveying, and particularly relates to a dry-running preventing device for a pump.
Background
It is known that dry running of the pump is extremely harmful to the operation of the pump, and in severe cases, the pump can be burnt in a very short time, which seriously affects industrial production. The dry running of the screw pump, the rotor pump and the gear pump has serious harm to the pump, and although the dry running resistance of the centrifugal pump is good, the service life of the pump is influenced to a certain extent. Especially in the transportation of some corrosive liquids or toxic and harmful liquids, the stable operation of the pump is very important. Once the pump is damaged, corrosive liquid or toxic and harmful liquid is leaked, environmental pollution is caused, and high cost is required for disposal.
There is screw pump dry running protector in the existing market, installs a temperature sensor on the stator of screw pump, and after screw pump dry running forwarded, the pump took place the high heat because of dry running friction, and the sensor detects pump body high temperature, through electrical system with pump stall. This does provide some protection to the pump, but is detected after dry running of the pump has occurred and the pump is then stopped. The pump is first run dry and to varying degrees is already harmful to the pump.
SUMMERY OF THE UTILITY MODEL
The technical problem to be solved by the utility model is to overcome the defects of the prior art and provide a dry operation prevention device for a pump, which is arranged on a liquid suction pipe of the pump, performs detection and automatic liquid supplementing operation before the pump runs, completely avoids the occurrence of dry operation of the pump, and has high automation degree and convenient use and maintenance.
In order to solve the technical problems, the utility model provides a pump dry running prevention device which comprises a mounting base, a liquid level sensor, a liquid supplementing electromagnetic valve and an exhaust electromagnetic valve, wherein a flow channel is arranged in the mounting base, one end of the flow channel is communicated with a dry running prevention pump, the other end of the flow channel is communicated with a liquid suction pipeline in front of the dry running prevention pump, and the liquid level sensor, the liquid supplementing electromagnetic valve and the exhaust electromagnetic valve are respectively communicated with the flow channel.
The pump anti-dry operation device is a device independent of the pump, the operation condition of the pump is controlled by the original system function, and the pump anti-dry operation device is only added with a set of protection program before the pump operates. Before the pump is started, the anti-dry-rotation device of the pump runs, and after the condition is met, the anti-dry-rotation device of the pump outputs a running signal to the pump control circuit, so that the pump runs. And in the operation process of the pump, if the pipeline in front of the pump is empty, the anti-dry device of the pump can output a signal to the pump control circuit to stop the pump.
The further optimized technical scheme of the utility model is as follows:
furthermore, the front end of the fluid infusion electromagnetic valve is connected with the fluid infusion pump through a pumping fluid pipeline.
Therefore, the liquid supplementing electromagnetic valve is connected with a pumping liquid pipeline in front, has certain pressure, and can enable liquid to flow into the anti-dry rotation device of the pump.
Furthermore, the drift diameter of the flow channel is the same as that of the liquid suction pipeline before the dry-operation-preventing pump.
By adopting the structure, the base can be conveniently installed between the pump and the liquid suction pipeline, the equipment structure does not need to be changed, and the installation is simple and convenient.
Further, the inlet of the exhaust electromagnetic valve is communicated with the flow channel of the mounting base, the outlet of the exhaust electromagnetic valve is provided with a downward elbow, and a liquid receiving barrel is arranged below the elbow, so that liquid can be prevented from overflowing and injuring an operator.
Further, the liquid level sensor, the liquid supplementing electromagnetic valve, the exhaust electromagnetic valve and the liquid supplementing pump are respectively connected with the controller.
Further, the controller is connected with a control circuit of the dry-running prevention pump.
According to the utility model, before the pump operates, the liquid level sensor performs liquid level detection on the liquid suction pipeline of the pump, then according to a detection result, the controller automatically controls the liquid supplementing electromagnetic valve to be opened when needed, the exhaust electromagnetic valve is opened simultaneously, liquid supplementing operation is performed on the liquid suction pipeline of the pump, when the liquid level of the liquid suction pipeline meets the requirement, the liquid supplementing electromagnetic valve is automatically closed, the exhaust electromagnetic valve is closed simultaneously, the controller outputs an operable signal to the pump control electric cabinet, and at the moment, the pump can operate.
Furthermore, the mounting base is of a cylindrical closed cavity structure, the front end face of the mounting base is connected with the liquid suction pipeline through a first flange, and the rear end face of the mounting base is connected with a liquid inlet of the dry-running prevention pump through a second flange.
Therefore, the inlet end and the outlet end of the pump dry-running preventing device are both arranged on a liquid suction pipeline of the pump in a flange or threaded connection mode, so that dry-running preventing operation can be conveniently carried out on the pump.
The utility model has the advantages that the dry running of the pump can be completely avoided by using the pump dry running prevention device, and the controller can display the liquid level state of the current liquid suction pipe. The automatic control system has the advantages of high automation degree and simplicity in use and maintenance.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic diagram of a controller according to the present invention.
In the figure: 1. the device comprises a mounting base, 2, a liquid level sensor, 3, an exhaust electromagnetic valve, 4, a liquid supplementing electromagnetic valve, 5 and a controller.
Detailed Description
Example 1
The embodiment provides a running device is prevented drying by pump installed on pump suction line, including mounting base 1, level sensor 2, exhaust solenoid valve 3, fluid infusion solenoid valve 4 and controller 5, mounting base 1 is inside to have a runner, and the one end of this runner and the inlet intercommunication of preventing drying the running pump, the other end and prevent drying the suction line intercommunication before the running pump to the latus rectum of this runner is the same with the latus rectum of suction line. The liquid level sensor 2, the liquid supplementing electromagnetic valve 4 and the exhaust electromagnetic valve 3 are respectively communicated with the flow channel. The liquid level sensor 2 may be a continuous liquid level detector or a set-point liquid level controller. The front end of the fluid infusion electromagnetic valve 4 is connected with a fluid infusion pump through a pumping fluid pipeline, and the fluid infusion pump pumps the fluid into the flow channel of the mounting base 1 through the pumping fluid pipeline and the fluid infusion electromagnetic valve 4 to carry out dry operation-proof fluid infusion on the pump. The inlet of the exhaust electromagnetic valve 3 is communicated with the flow channel of the mounting base 1, the outlet of the exhaust electromagnetic valve is provided with a downward elbow, the elbow is communicated with the flow channel of the mounting base 1 through the inner cavity of the exhaust electromagnetic valve 3 to discharge gas in the flow channel, and a liquid receiving barrel is arranged below the elbow to prevent liquid from overflowing and injuring operators.
Meanwhile, the exhaust solenoid valve 3 and the fluid infusion solenoid valve 4 are both normally closed solenoid valves, and when the solenoid valves are in failure and power failure, the system operation is not affected. The liquid level sensor 2 is connected with the acquisition end of the controller 5, and the output end of the controller 5 is respectively connected with the exhaust electromagnetic valve 3, the fluid infusion electromagnetic valve 4 and the fluid infusion pump. The output end of the controller 5 is also connected to a control circuit of the dry running prevention pump control electric cabinet, or the controller 5 is installed in the pump control electric cabinet. The controller 5 integrates liquid level detection capability and arithmetic capability, has the functions of an input and output relay, and has an integrated control instrument with an indication display function.
As shown in fig. 2, the controller comprises a relay, an isolation chip, a TMS320F28377P2P, a crystal oscillator, an operational amplifier conditioning circuit, a 3V reference circuit, a three-terminal filter circuit, a TPS54395, a URB2405, a two-to-two difference filter circuit and a TAS-24. The input end of the TMS320F28377P2P is connected with the crystal oscillator, the operational amplifier conditioning circuit and the 3V reference circuit, the output end of the TMS320F28377P2P is connected with the isolation chip, the output end of the isolation chip is connected with the relay, and the operational amplifier conditioning circuit receives a liquid level signal. The input of the 3V reference circuit is connected with a three-terminal filter circuit, the input of the three-terminal filter circuit is connected with TPS54395, the input of the TPS54395 is connected with URB2405, the input of the URB2405 is connected with two-in-two difference filter circuits, and the input of the two-in-two difference filter circuits is connected with TAS-24.
In addition, the mounting base 1 is a cylindrical closed cavity structure, the front end face of the mounting base is connected with a liquid suction pipeline through a first flange, and the rear end face of the mounting base is connected with a liquid inlet of an anti-dry operation pump through a second flange.
During operation, the controller 5 is powered on, the liquid level sensor 2 detects the liquid level state of the liquid pumping pipeline and feeds the liquid level state back to the controller 5, the controller 5 judges the liquid level, if the liquid level is low or the liquid level cannot be detected, the controller 5 controls the liquid supplementing electromagnetic valve 4 to be opened, and meanwhile, the exhaust electromagnetic valve 3 is controlled to be opened to supplement liquid for the liquid pumping pipeline. And when the controller 5 judges that the liquid level detected by the sensor 2 reaches the liquid level requirement, the exhaust electromagnetic valve 3 and the liquid supplementing electromagnetic valve 4 are controlled to be closed. At this moment, the controller 5 pilot lamp shows green, and controller 5 output running signal gives the pump control electric cabinet simultaneously, and the pump control electric cabinet receives running signal, and the pump can move this moment. The controller 5 detects that the liquid level does not reach the liquid level requirement, and the pilot lamp of controller 5 shows red, and controller 5 output can't operation signal gives the pump control electric cabinet, and the pump control electric cabinet receives can't operation signal, and the pump can't be moved this moment.
In addition to the above embodiments, the present invention may have other embodiments. All technical solutions formed by adopting equivalent substitutions or equivalent transformations fall within the protection scope of the claims of the present invention.
Claims (7)
1. A dry running prevention device for a pump is characterized in that: the anti-dry running pump comprises a mounting base, a liquid level sensor, a liquid supplementing electromagnetic valve and an exhaust electromagnetic valve, wherein a flow channel is arranged inside the mounting base, one end of the flow channel is communicated with an anti-dry running pump, the other end of the flow channel is communicated with a liquid suction pipeline in front of the anti-dry running pump, and the liquid level sensor, the liquid supplementing electromagnetic valve and the exhaust electromagnetic valve are respectively communicated with the flow channel.
2. The dry run prevention device for a pump according to claim 1, wherein: the front end of the fluid infusion electromagnetic valve is connected with a fluid infusion pump through a pumping fluid pipeline.
3. The dry run prevention device for a pump according to claim 1, wherein: the drift diameter of the flow channel is the same as that of the liquid suction pipeline in front of the dry operation preventing pump.
4. The dry run prevention device for a pump according to claim 1, wherein: the inlet of the exhaust electromagnetic valve is communicated with the flow channel of the mounting base, the outlet of the exhaust electromagnetic valve is provided with a downward elbow, and a liquid receiving barrel is arranged below the elbow.
5. The dry running prevention device for a pump according to claim 1, wherein: the liquid level sensor, the liquid supplementing electromagnetic valve and the exhaust electromagnetic valve are respectively connected with the controller.
6. The device of claim 5, wherein: the controller is connected with a control circuit of the dry-running preventing pump.
7. The dry run prevention device for a pump according to claim 1, wherein: the mounting base is of a cylindrical closed cavity structure, the front end face of the mounting base is connected with the liquid suction pipeline through a first flange, and the rear end face of the mounting base is connected with a liquid inlet of the dry-running prevention pump through a second flange.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123076216.0U CN216617881U (en) | 2021-12-09 | 2021-12-09 | Anti-dry operation device for pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123076216.0U CN216617881U (en) | 2021-12-09 | 2021-12-09 | Anti-dry operation device for pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216617881U true CN216617881U (en) | 2022-05-27 |
Family
ID=81701387
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123076216.0U Active CN216617881U (en) | 2021-12-09 | 2021-12-09 | Anti-dry operation device for pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216617881U (en) |
-
2021
- 2021-12-09 CN CN202123076216.0U patent/CN216617881U/en active Active
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