CN209908791U - Dry combustion protection device of multistage centrifugal pump - Google Patents

Dry combustion protection device of multistage centrifugal pump Download PDF

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Publication number
CN209908791U
CN209908791U CN201920626645.4U CN201920626645U CN209908791U CN 209908791 U CN209908791 U CN 209908791U CN 201920626645 U CN201920626645 U CN 201920626645U CN 209908791 U CN209908791 U CN 209908791U
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China
Prior art keywords
liquid level
centrifugal pump
plc
audible
protection device
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Active
Application number
CN201920626645.4U
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Chinese (zh)
Inventor
赵海兵
胡桂苓
王智
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JINING GOLDWATER TECHNOLOGY CO LTD
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JINING GOLDWATER TECHNOLOGY CO LTD
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Abstract

A dry combustion protection device of a multistage centrifugal pump comprises a centrifugal pump, a liquid level proximity switch, a temperature sensor, a PLC (programmable logic controller), an electric control cabinet, an audible and visual alarm, a liquid level switch relay and a cable, and is characterized in that the liquid level proximity switch comprises a probe, the probe is arranged inside the centrifugal pump, the temperature sensor is arranged outside the centrifugal pump, the PLC, the audible and visual alarm and the liquid level switch relay are respectively arranged in the electric control cabinet, the liquid level switch relay is electrically connected with the liquid level proximity switch through the cable, the PLC is electrically connected with the liquid level switch relay and the temperature sensor through the cable, and the audible and visual alarm is electrically connected with the PLC through the cable; the liquid level and the temperature of the centrifugal pump are detected simultaneously, whether the centrifugal pump has the dry burning phenomenon or not is judged, the audible and visual alarm sounds in time to remind workers of overhauling, the operation of the centrifugal pump can be interrupted, and the dry burning phenomenon of the centrifugal pump is avoided.

Description

Dry combustion protection device of multistage centrifugal pump
Technical Field
The utility model relates to a centrifugal pump technical field especially relates to a multistage centrifugal pump's dry combustion method protection device.
Background
In the industries of water supply, sewage and heat supply, the utilization rate of the multistage centrifugal pump is higher and higher. However, for the use of the centrifugal pump, the most worried problem is that the dry combustion is performed without water and the dry combustion is performed with air in the pump, the dry combustion phenomenon causes serious damage to the rotor and the stator of the pump, the centrifugal pump cannot work normally, the manual work is required to check frequently, the maintenance cost is high, and the supervision is also very inconvenient.
Disclosure of Invention
In order to solve the problem, the utility model provides a multistage centrifugal pump's dry combustion method protection device provides the protection device who avoids multistage centrifugal pump dry combustion method. In order to achieve the above purpose, the utility model adopts the following technical scheme: the utility model provides a multistage centrifugal pump's dry combustion method protection device, includes centrifugal pump, liquid level proximity switch, temperature sensor, PLC, automatically controlled cabinet, audible-visual annunciator, liquid level switch relay and cable, liquid level proximity switch include the probe, the probe setting in the inside of centrifugal pump, temperature sensor set up the outside at the centrifugal pump, PLC, audible-visual annunciator and liquid level switch relay set up respectively in automatically controlled cabinet, the liquid level switch relay passes through the cable and is connected with liquid level proximity switch electricity, PLC passes through the cable and is connected with liquid level switch relay and temperature sensor electricity respectively, audible-visual annunciator passes through the cable and is connected with the PLC electricity.
Further, the model of the PLC is set to siemens SMART 200.
Further, the model of the liquid level proximity switch is set to be LJC12A 3-A-Z-BY.
Further, the model of the liquid level switch relay is set to be JYB-714.
Further, the model of the temperature sensor is set to PT 1000.
Further, the model of the audible and visual alarm is set to ND16-22 FS.
Further, the cable is provided in the form of a multi-core rvvp shielded signal cable.
Compared with the prior art, the utility model discloses following beneficial effect has: the liquid level and the temperature of the centrifugal pump are detected simultaneously, whether the centrifugal pump has the dry burning phenomenon or not is judged, the audible and visual alarm sounds in time to remind workers of overhauling, the operation of the centrifugal pump can be interrupted, and the dry burning phenomenon of the centrifugal pump is avoided.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings.
FIG. 1 is a schematic structural diagram of the present invention;
in the drawings: 1. liquid level proximity switch, 2, temperature sensor, 3, liquid level switch relay, 4, audible and visual alarm, 5, motor, 6, automatically controlled cabinet.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the present invention will be further described with reference to fig. 1 and the specific embodiments.
As shown in the attached figure 1, the dry combustion protection device of the multistage centrifugal pump comprises a centrifugal pump, a liquid level proximity switch 1, a temperature sensor 2, a PLC, an electric control cabinet 6, an audible and visual alarm 4, a liquid level switch relay 3 and a cable, wherein the centrifugal pump is provided with a motor 5, the liquid level proximity switch 1 comprises a probe, the probe is arranged in the centrifugal pump, the temperature sensor 2 is arranged outside the centrifugal pump, the PLC, the audible and visual alarm 4 and the liquid level switch relay 3 are respectively arranged in the electric control cabinet 6, the liquid level switch relay 3 is electrically connected with the liquid level proximity switch 1 through the cable, the PLC is respectively electrically connected with the liquid level switch relay 3 and the temperature sensor 2 through the cable, and the audible and visual alarm 4 and the motor 5 are respectively electrically connected with the PLC through the cable.
Further, the model of the PLC is set to siemens SMART 200.
Further, the model of the liquid level proximity switch 1 is set to be LJC12A 3-A-Z-BY.
Further, the model of the liquid level switch relay 3 is set to be JYB-714.
Further, the model of the temperature sensor 2 is set to PT 1000.
Further, the model of the audible and visual alarm 4 is set to ND16-22 FS.
Further, the cable is provided in the form of a multi-core rvvp shielded signal cable.
The utility model discloses a theory of operation and working process as follows: when the centrifugal pump is dry-burned, no water exists in the centrifugal pump, cavitation is generated, high-temperature gas exists in the centrifugal pump, and the high-temperature phenomenon is generated outside the centrifugal pump. The liquid level approach switch 1 collects liquid level information of the centrifugal pump, when no water exists in a pipeline, the liquid level approach switch 1 acts, the liquid level switch relay 3 outputs a high level, the PLC collects a point position high level and simultaneously sends a signal to the audible and visual alarm 4 and the motor 5, the audible and visual alarm 4 is turned on, the motor 5 is powered off, and the centrifugal pump stops; the temperature sensor 2 collects the temperature outside the centrifugal pump, when the temperature exceeds a set value, a signal is sent to the PLC, the PLC processes the temperature and sends a signal to the audible and visual alarm 4 and the motor 5, the audible and visual alarm 4 is turned on, meanwhile, the motor 5 is powered off, and the centrifugal pump stops. Therefore, the centrifugal pump is protected doubly by detecting the temperature outside the centrifugal pump and the liquid level inside the centrifugal pump.
Compared with the prior art, the utility model discloses following beneficial effect has: the liquid level and the temperature of the centrifugal pump are detected simultaneously, whether the centrifugal pump has the dry burning phenomenon or not is judged, the audible and visual alarm sounds in time to remind workers of overhauling, the operation of the centrifugal pump can be interrupted, and the dry burning phenomenon of the centrifugal pump is avoided.
Utilize technical scheme, or technical personnel in the field are in the utility model discloses under technical scheme's the inspiration, design similar technical scheme, and reach above-mentioned technological effect, all fall into the utility model discloses a protection scope.

Claims (7)

1. A dry combustion protection device of a multistage centrifugal pump comprises a centrifugal pump, a liquid level proximity switch (1), a temperature sensor (2), a PLC, an electric control cabinet (6), an audible and visual alarm (4), a liquid level switch relay (3) and a cable, wherein the centrifugal pump is provided with a motor (5), it is characterized in that the liquid level proximity switch (1) comprises a probe which is arranged inside the centrifugal pump, the temperature sensor (2) is arranged outside the centrifugal pump, the PLC, the audible and visual alarm (4) and the liquid level switch relay (3) are respectively arranged in the electric control cabinet (6), the liquid level switch relay (3) is electrically connected with the liquid level proximity switch (1) through a cable, the PLC is electrically connected with the liquid level switch relay (3) and the temperature sensor (2) through cables, and the audible and visual alarm (4) and the motor (5) are electrically connected with the PLC through cables.
2. The dry fire protection device as claimed in claim 1, wherein the PLC is of the type siemens SMART 200.
3. The dry combustion protection device as claimed in claim 1, wherein the type of the liquid level proximity switch (1) is set to be LJC12a 3-a-Z-BY.
4. The dry combustion protection device as claimed in claim 1, wherein the liquid level switch relay (3) is provided with the type JYB-714.
5. Dry-fire protection device according to claim 1, characterized in that the temperature sensor (2) is of the type PT 1000.
6. The dry combustion protection device as claimed in claim 1, characterized in that the audible and visual alarm (4) is of the type ND16-22 FS.
7. The dry fire protection device of claim 1 wherein the cable is of the type configured as a multi-conductor rvvp shielded signal cable.
CN201920626645.4U 2019-05-05 2019-05-05 Dry combustion protection device of multistage centrifugal pump Active CN209908791U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201920626645.4U CN209908791U (en) 2019-05-05 2019-05-05 Dry combustion protection device of multistage centrifugal pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201920626645.4U CN209908791U (en) 2019-05-05 2019-05-05 Dry combustion protection device of multistage centrifugal pump

Publications (1)

Publication Number Publication Date
CN209908791U true CN209908791U (en) 2020-01-07

Family

ID=69046957

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201920626645.4U Active CN209908791U (en) 2019-05-05 2019-05-05 Dry combustion protection device of multistage centrifugal pump

Country Status (1)

Country Link
CN (1) CN209908791U (en)

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