CN203453021U - Cooling water shortage and shutdown protection device for vacuum pump - Google Patents
Cooling water shortage and shutdown protection device for vacuum pump Download PDFInfo
- Publication number
- CN203453021U CN203453021U CN201320499890.6U CN201320499890U CN203453021U CN 203453021 U CN203453021 U CN 203453021U CN 201320499890 U CN201320499890 U CN 201320499890U CN 203453021 U CN203453021 U CN 203453021U
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- vacuum pump
- cooling water
- water
- plc
- pressure sensor
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Abstract
The utility model discloses a cooling water shortage and shutdown protection device for a vacuum pump. The device comprises a water flow sensor, a water pressure sensor and a PLC (programmable logic controller), wherein the water flow sensor is arranged at the inlet of a cooling water pipeline; the water pressure sensor is arranged at the outlet of the cooling water pipeline; the signal output ends of the water flow sensor and the water pressure sensor are connected with the signal input end of the PLC; the signal output end of the PLC is connected with an intermediate relay and controls the intermediate relay; the normally closed contact of the intermediate relay is connected in series with a starting circuit of the vacuum pump. By the device, cooling water is automatically detected; the vacuum pump can be started only when the cooling water flows circularly; if the flow of the circulation cooling water is not detected, the vacuum pump cannot be started, so that the fault caused by the water circulation radiating water shortage of the vacuum pump can be prevented; therefore, the safe operation of the vacuum pump is guaranteed.
Description
Technical field
The utility model relates to vacuum pump, relates in particular to a kind of vacuum pump cooling water lack of water shutdown protector.
Background technique
As shown in Figure 1, the critical piece of reciprocating vacuum pump is cylinder 1 and the piston 2 that does reciprocating linear motion therein, and the driving of piston comprises crosshead with connecting rod 3() complete.Except above-mentioned critical piece, also have the accessories such as the vitals such as outlet valve 4 and Aspirating valves 5, and support, crankcase, motive sealing and static seal.During reciprocating vacuum pump running, under the driving of motor, the effect (rotatablely move and be transformed into straight line motion) by connecting rod, makes the piston reciprocates in cylinder.When piston is in cylinder during from left end end motion to the right, because the left cavity volume of cylinder constantly increases, the pressure of left cavity space constantly reduces, pressure in left cavity space is lower than the pressure of being taken out in container, according to the principle of gas pressure intensity balance, the gas of being taken out in container is constantly drawn into left chamber through Aspirating valves 5, is now in breathing process.When piston reaches least significant, cylinder has just been full of gas in left chamber.Then piston moves from right to left side, and now Aspirating valves 5 cuts out automatically.Gas is along with piston is from right toward left movement and compressed gradually.When the gas in cylinder reaches exhaust pressure, now outlet valve 4 is opened, and gas is discharged from, and has completed a work cycle.When piston is when from left end end motion to the right, repeat above-mentioned circulation, until taken out container, reach a certain balance pressure.The cooling system of vacuum pump is comprised of cooling water recirculation system, and system comprises motor, coolant pump, cooling tower etc., and during vacuum pump operation, cooling water carries out circulating cooling by cooling water pipeline 6 and continuous circulation to vacuum pump, and pipeline valve 7 is manual control.The problem that cooling water control system exists has:
1, temperature is high
While turning round due to reciprocating vacuum pump, piston repeats above-mentioned circulation from left end end motion to the right in cylinder body container, gas is along with piston is from right toward left movement and compressed gradually, making piston/cylinder container produce a large amount of heat energy is pump housing heating, in addition, pump shaft and end cap are mechanical seal, all the time frictional heating.These heats are all by the cooling water in pump housing centre, constantly to be looped coolingly, once cut off the water supply, temperature sharply raises in pump, makes the detonation of piston/cylinder container when reaching 600 ℃-800 ℃.
In addition, the cooling water recirculation system of existing vacuum pump, what use is that cooling water is entered cooling water circulation after circulation the heat of vacuum pump piston cylinder body internal tank is taken away through vacuum pump piston cylinder body container cooling bath left side by recycle pump, then from the cooling bath right side of piston/cylinder internal tank, flows out after cooling tower heat radiation and has been recycled back a cycle period.Because operator are before starting vacuum pump, first to first open the valve of cooling water recirculation system feed-water end, cooling water is circulated in advance
,and then startup vacuum pump, once not opening, the valve of cooling water recirculation system feed-water end make vacuum pump open operation, along with the temperature in piston/cylinder container (pump housing) sharply raises piston/cylinder container will detonation, this is breakneck, very easily causes the damage of equipment; The 2nd, virtually increased operator's labor intensity.
2, energy consumption is large
Because piston moves reciprocatingly in cylinder body container, pump shaft and end cap be owing to being mechanical seal, all the time frictional heat.On piston/cylinder container, by producing a large amount of heat energy, be just pump housing heating like this, because easily making cylinder body container, the continuous heating of the pump housing expands (expand with heat and contract with cold former in), the suction decrease in efficiency (exerting oneself not) that will cause like this vacuum pump, causes electric energy waste.
Model utility content
The purpose of this utility model is to provide a kind of vacuum pump cooling water lack of water stoppage protection, and whether detection has cooling water automatically, guarantees vacuum pump safe operation.
The utility model adopts following technical proposals: a kind of vacuum pump cooling water lack of water shutdown protector; include water flow sensing unit and hydraulic pressure sensor, PLC; described water flow sensing unit is arranged on the ingress of cooling water pipeline; described hydraulic pressure sensor is arranged on the outlet port of cooling water pipeline; described water flow sensing unit is connected the signal input part of PLC with the signal output part of hydraulic pressure sensor; the signal output part control connection auxiliary reclay of PLC, the normally-closed contact of auxiliary reclay is connected in the starting circuit of vacuum pump.
The signal output part of described PLC is connected with for vacuum pump being shut down to the warning device of reporting to the police.
The utility model detects cooling water automatically, while having cooling water circulation to flow, could open vacuum pump; if while can't detect cooling water cycle water mobile; vacuum pump can not be unlocked, and prevent and will protect vacuum pump to cause fault because of water circulation heat radiation lack of water, thereby guarantee vacuum pump safe operation
,alarm is sent at scene simultaneously.This device can be saved the bearing shell causing because of vacuum pump lack of water and burn the loss bringing, and has solved maintenance man difficult problem is installed when changing bearing shell, and the utility model has very high society generalization to be worth.
Accompanying drawing explanation
Fig. 1 is the fundamental diagram of vacuum pump;
Fig. 2 is the fundamental diagram of the vacuum pump after improving.
Embodiment
As shown in Figure 2; the utility model discloses a kind of vacuum pump cooling water lack of water shutdown protector; include water flow sensing unit 8 and hydraulic pressure sensor 9, PLC; described water flow sensing unit 8 is arranged on the ingress of cooling water pipeline; described hydraulic pressure sensor 9 is arranged on the outlet port of cooling water pipeline; described water flow sensing unit 8 is connected the signal input part of PLC with the signal output part of hydraulic pressure sensor 9; the signal output part control connection auxiliary reclay of PLC, the normally opened contact of auxiliary reclay is connected in the starting circuit of vacuum pump.The signal output part of described PLC is also connected with for vacuum pump being shut down to the warning device of reporting to the police.
Lack of water in cooling water recirculation system pipeline, water flow sensing unit 8 is with regard to output low level, PLC non-output signal, the normally opened contact of auxiliary reclay is in normally open, vacuum air pump inoperative, PLC sends alarm simultaneously; In cooling water recirculation system pipeline, there is flow of cooling water; water flow sensing unit 8 is just exported high level; and when the value of hydraulic pressure sensor reaches setting value; PLC output signal makes the normally opened contact of auxiliary reclay closed; control vacuum pump startup work; finally realize the controlling run of vacuum pump, play the protective action to vacuum pump, prevent and protect vacuum pump to cause fault because of water circulation heat radiation lack of water.Saved again the bearing shell causing because of vacuum pump lack of water and burnt the loss bringing simultaneously; solved maintenance man difficult problem has been installed when changing bearing shell; bearing shell price is 3500 yuan of left and right; this project not only can be used on vacuum pump; but also can have on the equipment of excessive low water level protection for air compressor etc.; therefore, this project has very high society generalization to be worth.
Claims (2)
1. a vacuum pump cooling water lack of water shutdown protector; it is characterized in that: include water flow sensing unit and hydraulic pressure sensor, PLC; described water flow sensing unit is arranged on the ingress of cooling water pipeline; described hydraulic pressure sensor is arranged on the outlet port of cooling water pipeline; described water flow sensing unit is connected the signal input part of PLC with the signal output part of hydraulic pressure sensor; the signal output part control connection auxiliary reclay of PLC, the normally-closed contact of auxiliary reclay is connected in the starting circuit of vacuum pump.
2. vacuum pump cooling water lack of water shutdown protector according to claim 1, is characterized in that: the signal output part of described PLC is connected with for vacuum pump being shut down to the warning device of reporting to the police.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320499890.6U CN203453021U (en) | 2013-08-16 | 2013-08-16 | Cooling water shortage and shutdown protection device for vacuum pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320499890.6U CN203453021U (en) | 2013-08-16 | 2013-08-16 | Cooling water shortage and shutdown protection device for vacuum pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203453021U true CN203453021U (en) | 2014-02-26 |
Family
ID=50132903
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320499890.6U Expired - Lifetime CN203453021U (en) | 2013-08-16 | 2013-08-16 | Cooling water shortage and shutdown protection device for vacuum pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203453021U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107786042A (en) * | 2017-09-30 | 2018-03-09 | 枣庄矿业集团新安煤业有限公司 | Motor cooling water protection device |
| CN111140517A (en) * | 2020-01-02 | 2020-05-12 | 杭州士腾科技有限公司 | Water temperature rise rate-based water pump shutdown control method, device and system |
| CN114396372A (en) * | 2021-12-24 | 2022-04-26 | 中科仪(南通)半导体设备有限责任公司 | Dry vacuum pump cooling system |
-
2013
- 2013-08-16 CN CN201320499890.6U patent/CN203453021U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107786042A (en) * | 2017-09-30 | 2018-03-09 | 枣庄矿业集团新安煤业有限公司 | Motor cooling water protection device |
| CN111140517A (en) * | 2020-01-02 | 2020-05-12 | 杭州士腾科技有限公司 | Water temperature rise rate-based water pump shutdown control method, device and system |
| CN114396372A (en) * | 2021-12-24 | 2022-04-26 | 中科仪(南通)半导体设备有限责任公司 | Dry vacuum pump cooling system |
| CN114396372B (en) * | 2021-12-24 | 2022-12-16 | 中科仪(南通)半导体设备有限责任公司 | Dry vacuum pump cooling system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP02 | Change in the address of a patent holder |
Address after: 450000 Yulin South Road, Henan, Zheng Dong, No. 16 South Road, Zhengzhou Patentee after: CHINA TOBACCO HENAN INDUSTRIAL Co.,Ltd. Address before: 450000 Henan province Zhengzhou guanchengou Longhai Road No. 72 Patentee before: CHINA TOBACCO HENAN INDUSTRIAL Co.,Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20140226 |
|
| CX01 | Expiry of patent term |