CN202001272U - Water pump free switching system - Google Patents
Water pump free switching system Download PDFInfo
- Publication number
- CN202001272U CN202001272U CN2011200401352U CN201120040135U CN202001272U CN 202001272 U CN202001272 U CN 202001272U CN 2011200401352 U CN2011200401352 U CN 2011200401352U CN 201120040135 U CN201120040135 U CN 201120040135U CN 202001272 U CN202001272 U CN 202001272U
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- contactor
- water pump
- normally
- control loop
- normally opened
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Abstract
The utility model belongs to the technical field of air conditioner refrigeration systems, and particularly discloses a water pump free switching system, which comprises three water pump pipelines, wherein a check valve is added onto every water pump pipeline, and a control circuit of the system consists of a three self-locking button switches, three contacts and a time relay. Front and rear butterfly valves of the water pump are not required to be opened and closed during the whole process of switching the working water pump and the reserve water pump, thereby saving labor and time, improving the working efficiency, and avoiding shutting down a host machine for switching the water pumps.
Description
Technical field
The utility model belongs to the air-conditioning refrigeration system technical field, is specifically related to the free switched system of a kind of water pump.
Background technique
In the central air conditioning project design and construction, often can see cooling waterpump or chilled water pump work system that dual-purpose one is equipped with.It comprises three water pump pipelines that are connected in parallel and controls the control circuit that each water pump opens and closes respectively; described water pump pipeline comprises preposition butterfly valve, water pump, the rearmounted butterfly valve that is cascaded successively; when switchable pump, to manually remove to open and close the front and back butterfly valve of two pumps that will switch; this needs a process; in most cases need to stop air-conditioner host, otherwise main frame can cause high voltage protective because of heat exchange is untimely.
The model utility content
In order to address the above problem, the purpose of this utility model is to provide a kind of free switched system of convenient water pump that uses.
For achieving the above object, technological scheme that the utility model adopts is as follows:
The free switched system of a kind of water pump comprises three water pump pipelines that are connected in parallel and controls the control circuit that each water pump opens and closes respectively that described water pump pipeline comprises preposition butterfly valve, water pump, the rearmounted butterfly valve that is cascaded successively; It is characterized in that:
One safety check is installed on the rising pipe of each described rearmounted butterfly valve;
Described control circuit comprises the first locking press button switch, the second locking press button switch, the 3rd locking press button switch, first contactor, second contactor, the 3rd contactor and the time relay;
The described first locking press button switch series is associated on the control loop of described first contactor, the normally opened contact of the normally opened contact of described first contactor and second contactor all is connected on the first water pump control loop, and the normally-closed contact of described the 3rd contactor is attempted by the normally opened contact two ends of described second contactor;
The described second locking press button switch series is associated on the control loop of described second contactor, the normally opened contact of the normally opened contact of described second contactor and first contactor all is connected on the second water pump control loop, and the normally-closed contact of described the 3rd contactor is attempted by the normally opened contact two ends of described first contactor;
Described the 3rd locking press button switch series is associated on the control loop of described the 3rd contactor, the normally-closed contact of the normally opened contact of described the 3rd contactor and first contactor all is connected on the 3rd water pump control loop, and the normally-closed contact of described second contactor is attempted by the normally-closed contact two ends of described first contactor.
The free switched system of described water pump, the situation that three water pumps that may occur when preventing original state are activated simultaneously takes place, also be provided with a time relay on described the 3rd water pump control loop, the delayed contact of the described time relay is connected with the normally opened contact of described the 3rd contactor.
The utility model is equipped with a safety check on the rising pipe of each rearmounted butterfly valve, can prevent effectively that the backflow phenomenon of stand by pump from taking place.
During original state, the first locking press button switch, the second locking press button switch and the 3rd self-lock switch all are set to closed state, so, the normally opened contact of first contactor, second contactor, the 3rd contactor is all closed, and the normally-closed contact of first contactor, second contactor, the 3rd contactor all can disconnect.Because, the normally opened contact of the normally opened contact of described first contactor and second contactor all is connected on the first water pump control loop, the normally opened contact of the normally opened contact of described second contactor and first contactor all is connected on the second water pump control loop, so, at this moment, first water pump and second control loop are connected, and the two is in running order.Because, the normally-closed contact of the normally opened contact of described the 3rd contactor and first contactor all is connected on the 3rd water pump control loop, the normally-closed contact of described second contactor is attempted by the normally-closed contact two ends of described first contactor, so, the 3rd water pump control loop is in the state of disconnection all the time, and second water pump can not worked.
When needs used the 3rd water pump, we only needed any of disconnecting in the first locking press button switch and the second locking press button switch to get final product.When disconnecting the first locking press button switch: the normally opened contact automatic disconnection of first contactor, the first water pump control loop also just is disconnected so, and first water pump quits work; The normally-closed contact auto-closing of first contactor, the 3rd water pump control loop also just is switched on, and the 3rd water pump is started working.
Therefore, the utility model need not remove to close and open the front and back butterfly valve of water pump again when the cut-in stand-by water pump, and the saving of labor saves time again, has improved working efficiency, and has also avoided switching the generation that water pump need stop the main frame situation.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present utility model, constitutes the application's a part, does not constitute to improper qualification of the present utility model, in the accompanying drawings:
Fig. 1 is a water pump pipe line structure schematic representation of the present utility model;
Fig. 2 is a control circuit structural representation of the present utility model.
Among the figure:
SB1: the first locking press button switch S B2: the second locking press button switch
SB3: the 3rd locking press button K switch M1: first contactor
KM2: the second contactor KM3: the 3rd contactor
KT: the time relay
Embodiment
Describe the utility model in detail below in conjunction with accompanying drawing and specific embodiment, be used for explaining the utility model in this illustrative examples of the present utility model and explanation, but not as to qualification of the present utility model.
Embodiment 1:
This enforcement discloses the free switched system of a kind of water pump, comprises three water pump pipelines that are connected in parallel and controls the control circuit that each water pump opens and closes respectively.
As shown in Figure 1, each water pump pipeline comprises preposition butterfly valve, water pump, rearmounted butterfly valve and the safety check that is cascaded successively.
As shown in Figure 2, control circuit comprises the first locking press button switch S B1, the second locking press button switch S B2, the 3rd locking press button switch S B3, the first contactor KM1, the second contactor KM2, the 3rd contactor KM3 and time relay KT; The first locking press button switch S B1 is connected on the control loop of the described first contactor KM1, the normally opened contact of the normally opened contact of the described first contactor KM1 and the second contactor KM2 all is connected on the first water pump control loop, and the normally-closed contact of described the 3rd contactor KM3 is attempted by the normally opened contact two ends of the described second contactor KM2; The second locking press button switch S B2 is connected on the control loop of the described second contactor KM2, the normally opened contact of the normally opened contact of the described second contactor KM2 and the first contactor KM1 all is connected on the second water pump control loop, and the normally-closed contact of described the 3rd contactor KM3 is attempted by the normally opened contact two ends of the described first contactor KM1; Described the 3rd locking press button switch S B3 is connected on the control loop of described the 3rd contactor KM3, the normally-closed contact of the normally opened contact of described the 3rd contactor KM3 and the first contactor KM1 all is connected on the 3rd water pump control loop, and the normally-closed contact of the described second contactor KM2 is attempted by the normally-closed contact two ends of the described first contactor KM1; Also be provided with a time relay K T on described the 3rd water pump control loop, the delayed contact of the described time relay is connected with the normally opened contact of described the 3rd contactor KM3.
The utility model, through after adding the new design of loaded check valve and control circuit on each water pump pipeline, mode of operation is that the butterfly valve before and after whole pumps advances equal standard-sized sheet in work, safety check can prevent effectively that the backflow phenomenon of stand by pump from taking place.SB1, SB2, all be in closed state under the SB3 working state, under the normal condition, first water pump and second water pump obtain starting after the actuating signal of main frame in advance and devoting oneself to work, the 3rd water pump can not start, because sealed in the timing closing contact of time relay KT in its control circuit, its make contact can not start the 3rd water pump after time is up, this is because first water pump and second water pump are devoted oneself to work, its normally-closed contact that is connected on the 3rd water pump control loop disconnects, cause and to start, so just realized the normal mode of operation that dual-purpose one is equipped with.When we need enable standby the 3rd water pump, we only need to disconnect any one switch among SB1 or the SB2, seal in the KM1 in parallel on the 3rd water pump control loop or the return of the arbitrary auxiliary contact of KM2 and all can connect the 3rd water pump control loop, devote oneself to work thereby start the 3rd water pump, then with SB1 or SB2 closure to treat switching next time.In the whole process, do not spend the front and back butterfly valve of closing and open water pump as can be seen, the saving of labor saves time again, has improved working efficiency, and has also avoided switching the generation that water pump need stop the main frame situation.
More than technological scheme that the utility model embodiment is provided be described in detail, used specific case herein the utility model embodiment's principle and mode of execution are set forth, above embodiment's explanation only is applicable to the principle that helps to understand the utility model embodiment; Simultaneously, for one of ordinary skill in the art, according to the utility model embodiment, the part that on embodiment and application area, all can change, in sum, this description should not be construed as restriction of the present utility model.
Claims (2)
1. free switched system of water pump, comprise three water pump pipelines that are connected in parallel and control the control circuit that each water pump opens and closes respectively, described water pump pipeline comprises preposition butterfly valve, water pump, the rearmounted butterfly valve that is cascaded successively, it is characterized in that:
One safety check is installed on the rising pipe of each described rearmounted butterfly valve;
Described control circuit comprises the first locking press button switch, the second locking press button switch, the 3rd locking press button switch, first contactor, second contactor, the 3rd contactor and the time relay;
The described first locking press button switch series is associated on the control loop of described first contactor, the normally opened contact of the normally opened contact of described first contactor and second contactor all is connected on the first water pump control loop, and the normally-closed contact of described the 3rd contactor is attempted by the normally opened contact two ends of described second contactor;
The described second locking press button switch series is associated on the control loop of described second contactor, the normally opened contact of the normally opened contact of described second contactor and first contactor all is connected on the second water pump control loop, and the normally-closed contact of described the 3rd contactor is attempted by the normally opened contact two ends of described first contactor;
Described the 3rd locking press button switch series is associated on the control loop of described the 3rd contactor, the normally-closed contact of the normally opened contact of described the 3rd contactor and first contactor all is connected on the 3rd water pump control loop, and the normally-closed contact of described second contactor is attempted by the normally-closed contact two ends of described first contactor.
2. the free switched system of water pump according to claim 1 is characterized in that:
Also be provided with a time relay on described the 3rd water pump control loop, the delayed contact of the described time relay is connected with the normally opened contact of described the 3rd contactor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200401352U CN202001272U (en) | 2011-02-16 | 2011-02-16 | Water pump free switching system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200401352U CN202001272U (en) | 2011-02-16 | 2011-02-16 | Water pump free switching system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202001272U true CN202001272U (en) | 2011-10-05 |
Family
ID=44704015
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200401352U Expired - Lifetime CN202001272U (en) | 2011-02-16 | 2011-02-16 | Water pump free switching system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202001272U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104914748A (en) * | 2015-05-13 | 2015-09-16 | 广西梧州运龙港船机械制造有限公司 | Marine pump control circuit |
| CN104948439A (en) * | 2015-05-13 | 2015-09-30 | 广西梧州运龙港船机械制造有限公司 | Method for controlling marine pump |
-
2011
- 2011-02-16 CN CN2011200401352U patent/CN202001272U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104914748A (en) * | 2015-05-13 | 2015-09-16 | 广西梧州运龙港船机械制造有限公司 | Marine pump control circuit |
| CN104948439A (en) * | 2015-05-13 | 2015-09-30 | 广西梧州运龙港船机械制造有限公司 | Method for controlling marine pump |
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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 |
Owner name: SHENZHEN MJ ENERGY ENVIRONMENTAL TECHNOLOGY CO., L Free format text: FORMER NAME: SHENZHEN MJ ELECTRIC INSTALLATION ENGINEERING CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 518000 Guangdong, Shenzhen, Xixiang, the streets of the streets of the labor community in the source of the source of the road business street F1-F21 Dong (F16-301) () Patentee after: Shenzhen Meizhao Energy & Environment Technology Co., Ltd. Address before: 518000 Guangdong, Shenzhen, Xixiang, the streets of the streets of the labor community in the source of the source of the road business street F1-F21 Dong (F16-301) () Patentee before: Shenzhen Meizhao Electric Installation Engineering Co., Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20111005 |
|
| DD01 | Delivery of document by public notice | ||
| DD01 | Delivery of document by public notice |
Addressee: Zhou Ziwen Document name: Notice of termination of patent right |