阅读说明：本技术 油水冷却器及其运行控制方法和用其构建的冷却系统 (Oil-water cooler, operation control method thereof and cooling system constructed by using same ) 是由 王汪洋 王捷 王电辉 黎贤钛 赖邦吉 俞天翔 于 2021-06-18 设计创作，主要内容包括：油水冷却器,包括I号冷却器本体、II号冷却器本体和控制柜；I号冷却器本体的进油口与I号油泵的出油口相连；II号冷却器本体的进油口与II号油泵的出油口相连；I号进油管路和II号进油管路通过旁通油路连通。本申请的油水冷却器按照特定的方式运行时,出现故障的频率较现有技术低,且本申请的油水冷却器具有特定的构造,只要其配备的其中一个油泵和其中一个冷却器本体正常,都可以实现在线检修,相比现有技术,在线检修的范围更广,出现停机检修的概率更小。对应的,本申请也提供了该油水冷却器的运行控制方法。同时,本申请也提供了用该油水冷却器构建的变压器强迫油循环冷却系统。(The oil-water cooler comprises a No. I cooler body, a No. II cooler body and a control cabinet; an oil inlet of the cooler I body is connected with an oil outlet of the oil pump I; an oil inlet of the No. II cooler body is connected with an oil outlet of the No. II oil pump; no. I oil inlet pipeline and No. II oil inlet pipeline are communicated through a bypass oil way. When the oil water cooler of this application was operated according to specific mode, the frequency that breaks down was lower than prior art, and the oil water cooler of this application has specific structure, as long as one of them oil pump and one of them cooler body that it was equipped with are normal, can all realize online maintenance, compares prior art, and the scope of online maintenance is wider, and the probability of appearing shutting down and examining is littleer. Correspondingly, the application also provides an operation control method of the oil-water cooler. Simultaneously, this application also provides the transformer forced oil circulation cooling system who constructs with this oil water cooler.)

1. Oil water cooler, its characterized in that: comprises a No. I cooler body (1), a No. II cooler body (2) and a control cabinet (11);

an oil inlet of the cooler I body (1) is connected with an oil outlet of the oil pump I (3) through an oil inlet pipeline I (12), and an oil inlet check valve I (4) and an oil way electric valve I (5) are sequentially arranged on the oil inlet pipeline I (12) along the oil flow direction; an oil inlet of the No. II cooler body (2) is connected with an oil outlet of the No. II oil pump (6) through a No. II oil inlet pipeline (13), and a No. II check valve (7) and a No. II oil circuit electric valve (8) are sequentially arranged on the No. II oil inlet pipeline (13) along the oil flow direction;

the oil inlet pipeline I (12) is communicated with the oil inlet pipeline II (13) through a bypass oil way (14), the connection point of the oil inlet pipeline I (12) and the bypass oil way (14) is positioned between the check valve I (4) and the electric valve I (5), and the connection point of the oil inlet pipeline II (13) and the bypass oil way (14) is positioned between the check valve II (7) and the electric valve II (8);

the control cabinet (11) is respectively electrically connected with the oil pump I (3), the oil circuit electric valve I (5), the oil pump II (6), the oil circuit electric valve II (8) and the leakage alarm devices on the cooler I body (1) and the cooler II body (2).

2. The oil-water cooler according to claim 1, characterized in that: oil inlets of the No. I oil pump (3) and the No. II oil pump (6) are respectively connected with two oil outlets of an oil inlet connecting pipe (9) through a pipeline provided with a manual butterfly valve; the oil outlets of the cooler I body (1) and the cooler II body (2) are respectively connected with two inlets of an oil outlet connecting pipe (10) through pipelines provided with manual butterfly valves.

3. The oil-water cooler according to claim 1, characterized in that: the water inlets of the No. I cooler body (1) and the No. II cooler body (2) are respectively connected with two water outlets of a water inlet connecting pipe (16) through pipelines provided with butterfly valves and water flow switches, and the water outlets of the No. I cooler body (1) and the No. II cooler body (2) are respectively connected with two water inlets of a water outlet connecting pipe (17) through pipelines provided with butterfly valves and water flow switches; the water flow switch is electrically connected with the control cabinet (11).

4. The oil-water cooler according to claim 1, characterized in that: an oil flow meter I (18) for detecting the flow of oil is arranged on the oil inlet pipeline I (12); the No. II oil inlet pipeline (13) is provided with a No. II oil flow meter (19) for detecting the oil flow; and the No. I oil flow meter (18) and the No. II oil flow meter (19) are both electrically connected with the control cabinet (11).

5. The oil-water cooler according to claim 1, characterized in that: and a bypass oil way valve (15) is arranged on the bypass oil way (14).

6. The oil-water cooler according to claim 5, characterized in that: the bypass oil way valve (15) is a manual butterfly valve.

7. The oil and water cooler as set forth in any one of claims 1 to 6, wherein: also comprises a base (20); no. I cooler body (1), No. II cooler body (2), No. I oil pump (3), No. II oil pump (6) and switch board (11) all fix and locate on base (20).

8. The operation control method of the oil-water cooler according to claim 1, characterized in that: in the method, in a normal working mode, one of an oil pump I (3) and an oil pump II (6) works, the other oil pump is standby, an oil circuit electric valve I (5) and an oil circuit electric valve II (8) are opened, and a cooler body I (1) and a cooler body II (2) are both in a working state;

when one of the cooler body I (1) and the cooler body II (2) has a fault, closing the corresponding oil circuit electric valve to stop the cooler body with the fault to wait for maintenance;

when the oil pump in work breaks down, the oil pump is switched to another oil pump to work, and the oil pump with the fault waits for maintenance.

9. The forced oil circulation water cooling system of the transformer is characterized in that: the system uses the oil-water cooler of claim 1.

10. The forced oil circulation water cooling system of the transformer as claimed in claim 9, wherein: in the system, the oil-water cooler is operated according to the operation control method as set forth in claim 8.

Technical Field

The application relates to a forced oil circulation water cooling technology, in particular to a forced oil circulation water cooler, an operation control method thereof and a cooling system constructed by the forced oil circulation water cooler.

Background

Transformers are key components in power systems, and stable supply of power is guaranteed only by reliable operation of the transformers. Reliable operation of the transformer requires a reliable cooling system.

In the prior art, a forced oil circulation cooling system is a common cooling system in a transformer, and in the forced oil circulation cooling system of the transformer, the reliability of an oil-water cooler determines the reliability of the cooling system to a great extent. Generally, an oil-water cooler includes a cooler body and an oil pump for forcing oil to circulate, and when operating, transformer oil exchanges heat with water in the cooler, and flows back to a transformer oil tank after being cooled. Cooler body and oil pump must normal work simultaneously just can guarantee the cooling effect, in case either breaks down, must shut down the maintenance, leads to the power failure phenomenon to appear, influences the normal supply of electric power, causes the loss. For this reason, in recent years, forced oil circulation cooling systems for transformers have been developed in which coolers are provided with two sets of coolers, and when one of the sets of coolers fails, the operation of the other set of coolers can be switched to, so that the on-line maintenance can be performed. However, the frequency of chiller failures in such cooling systems is not reduced, so that with greater equipment investment, the post-maintenance costs are not reduced. In addition, when the special condition that two groups of coolers have faults at the same time occurs, the machine can only be stopped for maintenance, power failure is caused, and loss is caused.

Disclosure of Invention

Aiming at the defects of the prior art, the application provides an oil-water cooler; when the oil water cooler of this application was operated according to specific mode, the frequency that breaks down was lower than prior art to the maintenance cost is lower, and the oil water cooler of this application has specific structure, as long as one of them oil pump that it was equipped with and one of them cooler body are normal, can all realize online maintenance, compare prior art, and the scope of online maintenance is wider, and the probability of the maintenance of stopping up appears littleer. Correspondingly, the application also provides an operation control method of the oil-water cooler, the oil-water cooler is controlled to work by using the operation control method, the failure frequency of the oil-water cooler can be reduced compared with the prior art, and therefore the maintenance cost is reduced. Simultaneously, this application also provides the transformer forced oil circulative cooling system who constructs with this oil water cooler, and the cooling system of this application operates according to specific mode, and the fault rate is low to the maintenance cost is low, and specific structure has decided its scope of examining and repairing on line wider, and the probability of the maintenance of appearing shutting down is littleer.

For the cooler, the specific technical scheme of the application is as follows:

the oil-water cooler comprises a No. I cooler body, a No. II cooler body and a control cabinet;

an oil inlet of the cooler I body is connected with an oil outlet of the oil pump I through an oil inlet pipeline I, and an oil inlet check valve I and an oil way electric valve I are sequentially arranged on the oil inlet pipeline I along the oil flow direction; an oil inlet of the No. II cooler body is connected with an oil outlet of the No. II oil pump through a No. II oil inlet pipeline, and a No. II check valve and a No. II oil way electric valve are sequentially arranged on the No. II oil inlet pipeline along the oil flow direction; the oil inlet pipeline I and the oil inlet pipeline II are communicated through a bypass oil way, the connection point of the oil inlet pipeline I and the bypass oil way is positioned between the check valve I and the electric valve of the oil way I, and the connection point of the oil inlet pipeline II and the bypass oil way is positioned between the check valve II and the electric valve of the oil way II; the switch board respectively with No. I oil pump, No. I oil circuit electrically operated valve, No. II oil pump, No. II oil circuit electrically operated valve to and the seepage alarm electric connection on No. I cooler body and No. II cooler body.

Compared with the prior art, in the technical scheme of the application, the oil-water cooler is provided with a cooler body I and a cooler body II, and is simultaneously provided with an oil pump I and an oil pump II, the cooler body I, the cooler body II, the oil pump I and the oil pump II are connected through a specific pipeline, under normal conditions, one of the two oil pumps can supply oil to the cooler bodies I and II, at the moment, oil is divided into two paths through a bypass oil path and respectively enters the cooler bodies I and II, the two paths are converged into an oil outlet connecting pipe after heat exchange, because the oil is divided into the two cooler bodies, the oil pressure and the flow velocity of the oil in the cooler bodies are lower, the frequency of the cooler bodies having faults is reduced, and because the oil is divided into the two cooler bodies, the heat exchange efficiency is higher to can control the oil pump and move with lower rotational speed, thereby make the frequency that the oil pump broke down also reduced, simultaneously, because oil pump operation rotational speed is low, the working flow of oil pump is lower, also can further reduce the frequency that the cooler body broke down. In addition, among the oil water cooler of this application, No. I oil pump can be No. I cooler body and No. II cooler body fuel feeding alone, No. II oil pump also can be No. I cooler body and No. II cooler body fuel feeding alone, thereby, when breaking down, as long as there is an oil pump and a cooler body can normally work, just can realize online maintenance, make the transformer can normally work, avoid causing the loss, compare prior art, the scope that can online maintenance is wider, the probability that the maintenance of stopping appears is lower.

As optimization, in the oil-water cooler, oil inlets of the oil pump I and the oil pump II are respectively connected with two oil outlets of an oil inlet connecting pipe through a pipeline provided with a butterfly valve; the oil outlets of the cooler I and the cooler II are respectively connected with two inlets of an oil outlet connecting pipe through pipelines provided with butterfly valves. By arranging the oil inlet connecting pipe and the oil outlet connecting pipe, the pipeline is simpler, the product is more compact, and the integrity is good; the pipeline that connects oil pump and oil feed union coupling to and connect cooler body and oil outlet union coupling is equipped with the butterfly valve, can block the flow of fluid through closing the butterfly valve, carries out online maintenance.

As an optimization, in the oil-water cooler, the water inlets of the cooler body I and the cooler body II are respectively connected with the two water outlets of the water inlet connecting pipe through pipelines provided with a butterfly valve and a water flow switch, and the water outlets of the cooler body I and the cooler body II are respectively connected with the two water inlets of the water outlet connecting pipe through pipelines provided with a butterfly valve and a water flow switch; the water flow switch is electrically connected with the control cabinet. The water inlet connecting pipe and the water outlet connecting pipe are arranged, so that the pipeline is simpler, the product structure is compact, and the integrity is good; the pipeline connecting the water inlet connecting pipe with the cooler body and connecting the water outlet connecting pipe with the cooler body is provided with the butterfly valve and the water flow switch, the butterfly valve can be closed to cut off the water supply pipeline and the water outlet pipeline, online maintenance can be carried out, and the water flow switch sends a fault signal when no water exists, so that the oil-water cooler has higher reliability.

As an optimization, in the oil-water cooler, an oil inlet pipeline I is provided with an oil flow meter I for detecting the flow of oil; the No. II oil inlet pipeline is provided with a No. II oil flow meter for detecting the oil flow; no. I oil flowmeter and No. II oil flowmeter all with switch board electric connection. Therefore, the oil pump can be judged to be in fault when the flow rate is abnormal through the oil flow meter, and the controller switches to work of the other oil pump.

Preferably, in the oil-water cooler, a bypass oil path valve is arranged on the bypass oil path. Therefore, the bypass oil way can be cut off by closing the bypass oil way valve, and the cooler body and the corresponding oil supply pipeline are integrally overhauled on line. Further, the bypass oil way valve is a manual butterfly valve. The bypass oil way valve has low use frequency, and the manual butterfly valve is favorable for controlling the cost.

As an optimization, the oil-water cooler further comprises a base; no. I cooler body, No. II cooler body, No. I oil pump, No. II oil pump and switch board are all fixed to be located on the base. Through setting up the base for the product wholeness is good, and is convenient for commodity circulation transportation and field installation.

For the operation control method, the application provides the following technical scheme:

in the method for controlling the operation of the oil-water cooler, in a normal working mode, one of the oil pump I and the oil pump II works, the other one is standby, the oil circuit electric valve I and the oil circuit electric valve II are opened, and the cooler body I and the cooler body II are both in a working state; when one of the cooler body I and the cooler body II has a fault, closing the corresponding oil circuit electric valve to stop the cooler body with the fault to wait for maintenance; when the oil pump in work breaks down, the oil pump is switched to another oil pump to work, and the oil pump with the fault waits for maintenance.

Compared with the prior art, in the above-mentioned method of this application, an oil pump is two cooler body fuel feeding simultaneously, because fluid is shunted to two cooler bodies, the oil pressure and the velocity of flow of fluid in the cooler body are all lower, thereby the frequency that the cooler body broke down obtains reducing, and because fluid is by the two cooler bodies of subchannel, heat exchange efficiency is higher, thereby can control the oil pump and operate with lower rotational speed, thereby make the frequency that the oil pump broke down also obtain reducing, the frequency that the cooler body broke down that also can further reduce simultaneously.

For the cooling system, the following technical scheme is provided in the application:

the transformer forces oil circulation water cooling system, and this system adopts aforementioned this application's oil water cooler.

Compared with the prior art, the cooling system of the oil-water cooler has the advantages that the oil-water cooler is adopted, so that the failure frequency is lower under a specific operation mode, and the maintenance cost is lower; and when breaking down, as long as have an oil pump and a cooler body can normally work, just can realize online maintenance, make the transformer can normally work, avoid causing the loss, compare prior art, the scope that can online maintenance is wider, and the probability that the maintenance of stopping up appears is lower.

Preferably, in the forced oil circulation water cooling system for the transformer, the oil-water cooler operates according to the operation control method of the application. Therefore, the failure frequency of the oil-water cooler is lower than that of the prior art, and the maintenance cost is lower.

Drawings

FIG. 1 is a front view of an oil-water cooler according to an embodiment of the present application;

FIG. 2 is a side view of an oil water cooler according to an embodiment of the present application;

FIG. 3 is a schematic view illustrating the direction of oil flow during normal operation of the oil-water cooler according to the embodiment of the present application; (the No. I oil pump supplies oil for the No. I cooler body and the No. II cooler body)

Fig. 4 is a schematic view of the direction of oil flow when the No. II oil pump supplies oil to the No. I cooler body and the No. II cooler body;

FIG. 5 is a schematic view of the direction of oil flow when the oil pump I supplies oil to the cooler body I;

FIG. 6 is a schematic view of the direction of oil flow when the oil pump II supplies oil to the cooler body II;

FIG. 7 is a schematic view of the direction of oil flow when the oil pump I supplies oil to the cooler body II;

fig. 8 is a schematic view of the direction of oil flow when the No. II oil pump supplies oil to the No. I cooler body;

the reference numbers in the figures are: cooler 1-I; 2-II cooler body; no. 3-I oil pump; no. 4-I check valve; no. 5-I oil circuit electric valve; no. 6-II oil pump; no. 7-II check valves; no. 8-II oil circuit electric valve; 9-oil inlet connecting pipe; 10-oil outlet connecting pipe; 11-a control cabinet; no. 12-I oil inlet pipeline; no. 13-II oil inlet pipeline; 14-bypass oil circuit; 15-bypass oil way valve; 16-a water inlet connecting pipe; 17-water outlet connecting pipe; number 18-I oil flow meter; no. 19-II oil flow meter; 20-base.

Detailed Description

The present application will now be described with reference to the accompanying drawings, which are by way of illustration, but not by way of limitation, specific embodiments. In the following examples, the details which are not described in detail are all common knowledge in the art.

Example (b):

referring to fig. 1 and 2, the oil-water cooler of the present embodiment includes a cooler body 1 No. I, a cooler body 2 No. II, and a control cabinet 11.

In this embodiment, an oil inlet of the No. I cooler body 1 is connected to an oil outlet of the No. I oil pump 3 through an No. I oil inlet pipeline 12, and an No. I check valve 4 and an No. I oil circuit electric valve 5 are sequentially arranged on the No. I oil inlet pipeline 12 along an oil flow direction; no. 2 cooler body's of No. II oil inlet is through II oil inlet pipeline 13 and II oil pump 6's oil-out continuous, II oil inlet pipeline 13 is gone up and is equipped with No. 7 check valves of No. II and II oil circuit electrically operated valve 8 along the oil flow direction according to the preface.

In this embodiment, No. I oil inlet pipeline 12 and No. II oil inlet pipeline 13 are communicated through bypass oil path 14, the connection point of No. I oil inlet pipeline 12 and bypass oil path 14 is located between No. I check valve 4 and No. I oil path electric valve 5, and the connection point of No. II oil inlet pipeline 13 and bypass oil path 14 is located between No. II check valve 7 and No. II oil path electric valve 8.

In this embodiment, switch board 11 respectively with No. I oil pump 3, No. I oil circuit electrically operated valve 5, No. II oil pump 6, No. II oil circuit electrically operated valve 8 to and the seepage alarm electric connection on No. I cooler body 1 and No. II cooler body 2.

In the embodiment, the oil inlets of the No. I oil pump 3 and the No. II oil pump 6 are respectively connected with the two oil outlets of the oil inlet union 9 through pipelines provided with manual butterfly valves; the oil outlets of the No. I cooler body 1 and the No. II cooler body 2 are respectively connected with two inlets of the oil outlet connecting pipe 10 through pipelines provided with manual butterfly valves. The butterfly valve in the pipeline adopts a manual butterfly valve, so that the use requirement and the use convenience can be met, and the cost can be controlled.

In this embodiment, the water inlets of the cooler body 1 and the cooler body 2 are respectively connected with the two water outlets of the water inlet connecting pipe 16 through pipelines provided with manual butterfly valves and water flow switches, and the water outlets of the cooler body 1 and the cooler body 2 are respectively connected with the two water inlets of the water outlet connecting pipe 17 through pipelines provided with manual butterfly valves and water flow switches; and the water flow switch is electrically connected with the control cabinet 11. As above, the butterfly valve in the pipeline adopts the manual butterfly valve can satisfy the use needs and the convenience of use, and is favorable to controlling the cost.

In this embodiment, the No. I oil inlet pipeline 12 is provided with a No. I oil flow meter 18 for detecting oil flow; the No. II oil inlet pipeline 13 is provided with a No. II oil flow meter 19 for detecting the oil flow; and the No. I oil flow meter 18 and the No. II oil flow meter 19 are both electrically connected with the control cabinet 11.

In this embodiment, a bypass oil path valve 15 is disposed on the bypass oil path 14. The bypass oil way valve 15 is a manual butterfly valve.

In this embodiment, the oil-water cooler further includes a base 20; no. 1 cooler body, No. 2 cooler body, No. 3 oil pump, No. 6 oil pump and the switch board 11 of No. II all fix and locate on base 20.

In this embodiment, the operation control method of the oil-water cooler is as follows:

under the normal operating mode, No. 3 work of oil pump, No. 6 reserve oil pumps of No. II, No. 5 and No. 8 opening of oil circuit electrically operated valves of No. I oil circuit, No. 1 coolers of No. I and No. 2 coolers of No. II all are in operating condition. Under the normal operating mode, fluid divides into two the tunnel through the reposition of redundant personnel pipeline and gets into No. I cooler body 1 and No. II cooler body 2 respectively, and No. I oil pump 3 is two cooler body fuel feeding simultaneously promptly, and the oil flow direction is as shown in figure 3, and at this moment, the oil pressure and the velocity of flow of fluid in the cooler body are all lower, and heat exchange efficiency is high. Because heat exchange efficiency is high, can control the oil pump and rotate with lower rotational speed, the concrete parameter is confirmed after the producer tests according to the heat transfer demand.

When one of cooler body 1 and cooler body 2 of II number breaks down, close corresponding oil circuit electrically operated valve, make the cooler body stop work that breaks down, wait for the maintenance. If the cooler body 1I fails, after the electric valve 5 of the oil circuit I is closed, the oil pump 3I supplies oil to the cooler body 2 II, and the oil flow direction is as shown in FIG. 7; if No. II cooler body 2 breaks down, No. II oil circuit electrically operated valve 8 closes the back, and No. I oil pump 3 is No. I cooler body 1 oil supply, and the oil flow direction is as shown in fig. 5. During the maintenance, close the butterfly valve of locating the cooler body oil-out that breaks down and play oil union coupling intertube, then can carry out maintenance or change to the cooler body that breaks down.

When I oil pump 3 broke down, switched to II oil pump 6 work, arranged the maintenance to I oil pump 3. After the oil pump 6 is switched to the oil pump II to work, the oil pump 6 II supplies oil to the cooler body I1 and the cooler body II 2, and the oil flow direction is shown in FIG. 4. During maintenance, the butterfly valve arranged between the inlet of the No. I oil pump 3 and the outlet of the oil inlet connecting pipe 9 is closed, and online maintenance or replacement is carried out.

In the working process of the No. II oil pump 6, if one cooler body fails, the corresponding oil circuit electric valve is also closed, so that the failed cooler body stops working to wait for maintenance. If the cooler body I1 fails, after the electric valve 5 of the oil circuit I is closed, the oil pump II 6 supplies oil to the cooler body II 2, and the oil flow direction is as shown in FIG. 6; if No. II cooler body 2 breaks down, No. II oil circuit electrically operated valve 8 closes the back, and No. II oil pump 6 is No. I cooler body 1 oil feed, and the oil flow direction is as shown in fig. 8. During the maintenance, close the butterfly valve of locating the cooler body oil-out that breaks down and play oil union coupling intertube, then can carry out maintenance or change to the cooler body that breaks down.

As a specific application case of the oil-water cooler of the above embodiment: in this application case, the forced oil circulation water cooling system of the transformer is constructed by using the oil-water cooler of the above embodiment. And the oil-water cooler is operated according to the operation control method in the above embodiment.

It should be noted that the oil-water cooler of the present application may also operate according to other methods, such as:

in a normal working mode, the oil pump 3I supplies oil to the cooler body 1I, and the oil pump 6 II and the cooler body 2 II are reserved; when the cooler body 1I breaks down, the operation is switched to the cooler body 2 II to work, the oil pump 3I supplies oil to the cooler body 2 II, and the cooler body 1I waits for maintenance; when No. 3 oil pumps break down, switch to No. 6 work of No. II oil pumps, No. 6 oil pumps are the 1 fuel feeding of No. I cooler body, and No. 3 oil pumps wait for the maintenance. By adopting the method for operation, the oil-water cooler can realize on-line maintenance (which is determined by the structure of the oil-water cooler) under the condition that an oil pump and a cooler body can work normally. However, compared with the prior art, the failure frequency of the oil-water cooler cannot be reduced, and the later maintenance cost is relatively high.

The above-described embodiments are merely illustrative of the preferred embodiments of the present application and do not limit the spirit and scope of the present application. Various modifications and improvements of the technical solutions of the present application made by those skilled in the art without departing from the design concept of the present application shall fall within the protection scope of the present application, and the technical contents of the present application, which are claimed, are all described in the claims.