Condensate pump body bearing cooling water system

Abstract

The condensate pump body bearing cooling water system comprises a cooling pipeline and a positive flushing pipeline. The cooling pipeline is used for cooling the pump body bearing and comprises a cooling water pipe connected to the condensate pump body and a cooling cavity arranged in the condensate pump body. The cooling water pipe is in communication with the cooling cavity. The cooling water pipe comprises a cooling water inlet pipe and a cooling water outlet pipe located on both sides of the condensate pump body. A one-way valve is arranged on the cooling water inlet pipe. A flow meter for detecting the flow of cooling water is arranged on the cooling water outlet pipe. One end of the positive flushing pipeline is in communication with the condensate pump outlet pipe, and the other end is in communication with the cooling water inlet pipe. A positive flushing valve is arranged on the positive flushing pipeline. When the cooling pipeline is blocked, the positive flushing valve is opened. The high-pressure condensate water flowing out of the condensate pump outlet pipe flows along the cooling pipeline in the positive direction to remove the blockage. The technical effect of processing the blockage without stopping the pump is achieved. The operation is convenient, time-saving and labor-saving, and the effect is good.

Description

Technical Field

[0001] This invention belongs to the field of condensate pump technology, specifically relating to a condensate pump body bearing cooling water system. Background Technology

[0002] Condensate pumps are one of the important pieces of equipment in the condensate system of thermal power units. They are used to pump condensate to the deaerator and are characterized by high speed and high pumping pressure. Most existing condensate pumps cool their bearings through cooling pipes. The cooling pipes consist of cooling water pipes connected to the pump body and cooling chambers set in the pump body. The cooling water in the cooling pipes comes from surface water or deep well water, which is pumped in through the pump house, absorbs heat from the pump body bearings, and then flows out on its own. Due to the low water pressure (generally around 0.2 MPa), poor water quality, high impurity and microbial content, and the presence of plant and animal larvae and spores, the cooling water is prone to blockage due to the adhesion, accumulation, and scaling of impurities in the cooling pipes, as well as the reproduction and growth of microorganisms and plants in the cooling pipes. This leads to a reduction in cooling water flow, and in severe cases, it can even cause the cooling water to stop flowing, preventing the heat from the pump body bearings from being discharged in time, thus damaging the pump body bearings.

[0003] To solve this problem, the existing methods mostly involve stopping the pump, removing the cooling water pipes, and then cleaning the cooling pipes by inserting a thin wire. This is time-consuming, labor-intensive, and inconvenient. The wire can also easily scratch the pipe walls, making it easier for impurities, microorganisms, and plants and animals to accumulate at the scratches during subsequent use, causing blockages. Prolonged pump shutdowns can also lead to insufficient water levels in the deaerator, causing the thermal power unit to shut down and seriously affecting the safe and stable operation of the thermal power unit. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a condensate pump body bearing cooling water system. This system can handle blockage problems without stopping the pump, and is easy to operate, saves time and effort, and has good results without affecting the safe and stable operation of thermal power units.

[0005] To achieve the above objectives, the technical solution provided by the present invention is a condensate pump body bearing cooling water system, comprising:

[0006] A cooling pipeline for cooling the pump body bearing, the cooling pipeline includes a cooling water pipe connected to the condensate pump body and a cooling chamber disposed in the condensate pump body, the cooling water pipe being connected to the cooling chamber, the cooling water pipe including a cooling water inlet pipe and a cooling water outlet pipe located on both sides of the condensate pump body, the cooling water inlet pipe being provided with a one-way valve, and the cooling water outlet pipe being connected with a flow meter for detecting the cooling water flow rate;

[0007] The condensate pump body bearing cooling water system also includes a forward flushing pipe. One end of the forward flushing pipe is connected to the condensate pump outlet pipe, and the other end of the forward flushing pipe is connected to the cooling water inlet pipe. The forward flushing pipe is equipped with a forward flushing valve. When the cooling pipe is blocked, the forward flushing valve opens, and the high-pressure condensate flowing out of the condensate pump outlet pipe flows forward along the cooling pipe to clear the blockage.

[0008] Preferably, the condensate pump body bearing cooling water system further includes a controller electrically connected to the flow meter and the positive flush valve, the controller controlling the opening and closing of the positive flush valve according to the flow value detected by the flow meter.

[0009] More preferably, the condensate pump body is also connected to a temperature sensor for detecting the temperature of the lubricating fluid in the pump body bearing. The temperature sensor is electrically connected to the controller, and the controller also controls the opening and closing of the positive flush valve according to the detection value of the temperature sensor.

[0010] More preferably, the controller responds to the temperature sensor with higher priority than the flow meter.

[0011] Preferably, the positive flushing pipeline is connected to the condensate pump outlet pipe via a pressure detection port opened on the condensate pump outlet pipe.

[0012] Preferably, the positive-flush valve includes an electric gate valve.

[0013] Preferably, the flow meter includes an electromagnetic flow meter.

[0014] More preferably, the check valve's check pressure is greater than the outlet pressure of the condensate pump's outlet pipe.

[0015] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art:

[0016] The present invention provides a condensate pump body bearing cooling water system, comprising: a cooling pipeline and a forward flushing pipeline. The cooling pipeline is used to cool the pump body bearing and includes a cooling water pipe connected to the condensate pump body and a cooling chamber disposed within the condensate pump body. The cooling water pipe is connected to the cooling chamber and includes a cooling water inlet pipe and a cooling water outlet pipe located on both sides of the condensate pump. A one-way valve is provided on the cooling water inlet pipe, and a flow meter for detecting the cooling water flow rate is connected to the cooling water outlet pipe. By connecting one end of the forward flushing pipeline to the condensate pump outlet pipe and the other end to the cooling water inlet pipe, and by providing a forward flushing valve on the forward flushing pipeline, when the cooling pipeline is blocked, the forward flushing valve is opened, and the high-pressure condensate flowing from the condensate pump outlet pipe flows forward along the cooling pipeline to clear the blockage. This achieves the technical effect of handling blockage problems without stopping the pump, and is convenient to operate, time-saving, labor-saving, and effective. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a preferred embodiment of the present invention.

[0018] The components are as follows: 111. Cooling water inlet pipe; 112. Cooling water outlet pipe; 113. Check valve; 114. Flow meter; 12. Cooling chamber; 20. Positive flushing pipe; 21. Positive flushing valve; 22. First tee; 23. Second tee; 30. Controller; 40. Condensate pump body; 41. Temperature sensor; 50. Condensate pump outlet pipe; 51. Pressure detection port; 52. Pressure sensor. Detailed Implementation

[0019] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby providing a clearer and more explicit definition of the scope of protection of the present invention.

[0020] like Figure 1As shown, the condensate pump body bearing cooling water system provided by the present invention includes: a cooling pipeline and a positive flow pipeline 20. The cooling pipeline is used to cool the pump body bearing and includes a cooling water pipe and a cooling chamber 12. The cooling water pipe is connected to the condensate pump body 40. Specifically, the cooling water pipe includes a cooling water inlet pipe 111 and a cooling water outlet pipe 112 located on both sides of the condensate pump body 40. A one-way valve 113 is provided on the cooling water inlet pipe 111. The check pressure of the one-way valve 113 is greater than the outlet pressure of the condensate pump outlet pipe 50. A flow meter 114 for detecting the cooling water flow is connected to the cooling water outlet pipe 112. The cooling chamber 12 is located inside the condensate pump body 40 and close to the pump body bearing. The cooling water pipe is connected to the cooling chamber 12. One end of the positive flow pipeline 20 is connected to... The first tee 22 is connected to the condensate pump outlet pipe 50, and the other end is connected to the cooling water inlet pipe 112 via the second tee 23. The second tee 23 is located between the check valve 113 and the condensate pump body 40. A positive flush valve 21 is provided on the positive flush pipe 20. The positive flush valve 21 is an electric gate valve. The positive flush valve 21 is located between the first tee 22 and the second tee 23. When the cooling pipe is blocked, the positive flush valve 21 opens and connects the positive flush pipe 20. The high-pressure condensate (pressure of about 1.0 MPa, compared to the 0.2 MPa of the cooling water) flowing from the condensate pump outlet pipe 50 flows in the forward direction of the cooling pipe 20 (forward flow means flowing in the direction of the cooling water flow), mixes with the cooling water, and flushes the cooling pipe 20 to remove the blockage.

[0021] The advantage of this setup is that it can handle blockages without stopping the pump, and it is easy to operate, saves time and effort, and is effective. It only requires the addition of a positive flushing pipeline and a flow meter on the cooling water outlet pipe. It is low-cost and all connections are made nearby, making it very suitable for the retrofitting of existing condensate pump body bearing cooling water systems.

[0022] To achieve automatic clearing of blockages and avoid overheating of the pump body bearing due to untimely personnel inspection, in this embodiment, the condensate pump body bearing cooling water system also includes a controller 30. The controller 30 is electrically connected to the flow meter 114 and the positive flush valve 21. The controller 30 controls the opening and closing of the positive flush valve 21 according to the flow value detected by the flow meter 114. Specifically, when the flow value detected by the flow meter 114 is lower than the set value, the controller 30 controls the positive flush valve 21 to open; when the flow value and the flow value detected by 114 are equal to or higher than the set value, the controller 30 controls the positive flush valve 21 to close.

[0023] Indirect feedback of the pump bearing's cooling effect via flow rate is unreliable. For example, when the cooling water temperature is high and the cooling pipe is unblocked or only slightly blocked, the flow rate detected by flow meter 114 may be equal to or higher than the set value, but the actual temperature of the pump bearing may be high. To address this issue, in this embodiment, a temperature sensor 41 for detecting the temperature of the lubricating fluid (such as lubricating oil) inside the pump bearing is also connected to the condensate pump body 40. The probe of the temperature sensor 41 can be inserted into the lubricating fluid pipe. The temperature sensor 41 is electrically connected to the controller 30. The controller 30 also controls the opening and closing of the positive flow valve 21 based on the detection value of the temperature sensor 41. Furthermore, the controller 30 prioritizes responding to the temperature sensor 41 over the flow meter 114.

[0024] To achieve a nearby connection and modify the existing condensate pump body bearing cooling water system with minimal changes, and to ensure that the condensate flow rate entering the cooling pipe through the forward flushing pipe 20 is within a reasonable range and does not affect the deaerator return water, in this embodiment, the forward flushing pipe 20 is connected to the condensate pump outlet pipe 50 through a pressure detection port 51 opened on the condensate pump outlet pipe 50. Due to the limitation of the orifice diameter of the pressure detection port 51, the condensate flow rate entering the cooling pipe through the forward flushing pipe 20 will not be too large (usually less than 1 ton / hour), and will not affect the deaerator return water (usually 45-50 tons / hour).

[0025] To prevent deposits from clogging the flow meter 114 during positive flow, an electromagnetic flow meter is selected for the flow meter 114 in this embodiment.

[0026] The above embodiments are only for illustrating the technical concept and features of the present invention. Their purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly. They should not be used to limit the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A condensate pump body bearing cooling water system, comprising: a cooling pipeline for cooling the pump body bearing, the cooling pipeline comprising a cooling water pipe connected to the condensate pump body and a cooling cavity arranged in the condensate pump body, the cooling water pipe being in communication with the cooling cavity, the cooling water pipe comprising a cooling water inlet pipe and a cooling water outlet pipe located on both sides of the condensate pump body, a one-way valve being arranged on the cooling water inlet pipe, and a flow meter for detecting the flow of cooling water being connected to the cooling water outlet pipe; a backflush pipeline; characterized in that: one end of the backflush pipeline is in communication with the condensate pump outlet pipe through a pressure detection port formed on the condensate pump outlet pipe, and the other end of the backflush pipeline is in communication with the cooling water inlet pipe, a backflush valve being arranged on the backflush pipeline, the backflush valve being opened when the cooling pipeline is blocked, and the high-pressure condensate water flowing out of the condensate pump outlet pipe flows in the forward direction along the cooling pipeline to remove the blockage; the condensate pump body bearing cooling water system further comprises a controller electrically connected to the flow meter and the backflush valve, the controller controlling the opening and closing of the backflush valve according to the flow value detected by the flow meter.

2. The condensate pump body bearing cooling water system of claim 1, wherein: A temperature sensor for detecting the temperature of the lubricating liquid in the pump body bearing is further connected to the condensate pump body, the temperature sensor being electrically connected to the controller, and the controller further controls the opening and closing of the backflush valve according to the detection value of the temperature sensor.

3. The condensate pump body bearing cooling water system of claim 2, wherein: The priority of the temperature sensor is higher than that of the flow meter.

4. The condensate pump body bearing cooling water system of claim 1, wherein: The backflush valve comprises an electric gate valve.

5. The condensate pump body bearing cooling water system of claim 1, wherein: The flow meter comprises an electromagnetic flow meter.

6. The condensate pump bearing cooling water system of any of claims 1-5, wherein: The check pressure of the one-way valve is greater than the outlet pressure of the condensate pump outlet pipe.

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