Heat supply network circulating pump and self-sealing structure thereof

Abstract

The embodiment of the invention provides a heat supply network circulating pump and a self-sealing structure thereof, and the self-sealing structure comprises a water intake pipeline of which the inlet is used for communicating with an outlet pipeline with an outlet check valve of the heat supply network circulating pump; the pressure adjusting piece, the filtering assembly and the cooling assembly are sequentially arranged on the water taking pipeline in series; an inlet of the water outlet pipeline is communicated with an outlet of the water taking pipeline, and an outlet of the water outlet pipeline is used for being communicated with a mechanical seal water inlet of a heat supply network circulating pump. The water source of the outlet pipeline of the heat supply network circulating pump serves as the mechanical seal water of the heat supply network circulating pump, stability of the mechanical seal water of the heat supply network circulating pump can be guaranteed, sealing water can be provided as long as the pump operates, the sealing water is not needed when the pump does not operate, and therefore the water source is stable. The water in the heat supply network system is chemically supplemented fresh water, so that the water quality is relatively stable. The overpressure problem of the heat supply network system can be effectively solved, after self-sealing is adopted, no external water source enters the heat supply network circulating water system, the pressure of the heat supply network system cannot rise, and the heat supply network system runs more stably.

Description

Technical Field

[0001] The embodiments of the present invention relate to the technical field of heat network circulation pumps, and in particular to a heat network circulation pump and a self-sealing structure thereof. Background Art

[0002] In the modern industrial field, especially in large energy conversion facilities such as power plants, heat network pumps are used as key equipment to maintain the heat transfer efficiency of the system. In order to ensure the sealing performance of the heat network pump and extend its service life, it is usually necessary to use mechanical seal water to cool and lubricate the mechanical seal parts of the pump. In traditional designs, the source of mechanical seal water is mostly external water sources, such as closed cooling water inside the power plant, auxiliary machine water, treated reclaimed water or domestic water.

[0003] However, the prior art has several objective shortcomings, which are as follows:

[0004] Waste of water resources: The sealing water of the heat network pump is not recycled after use, but is directly discharged into the heat network system. This practice not only consumes a large amount of precious water resources, but also increases operating costs, which is contrary to the current concept of energy conservation and emission reduction.

[0005] Water supply stability problem: Relying on an external water source to supply machine seal water may cause water supply interruption, which will cause the machine seal of the heat network pump to burn due to lack of necessary cooling and lubrication, thus affecting the safety and reliability of the equipment.

[0006] Risk of unstable water quality: Even under normal circumstances, the water quality of the external water source may be unstable and contain a lot of impurities. These impurities may cause wear and corrosion of the mechanical seal, shorten its service life, and increase maintenance frequency and cost.

[0007] System pressure fluctuation: When the machine seal water from an external water source enters the heating network circulating water system, it may cause the water pressure in the system to increase, posing a hidden danger to the safe and stable operation of the entire heating network system, and may even cause more serious accidents. Summary of the invention

[0008] The embodiment of the present invention aims to solve at least one of the technical problems existing in the prior art, and provides a heat network circulation pump and a self-sealing structure thereof.

[0009] In a first aspect, an embodiment of the present invention provides a self-sealing structure of a heat network circulation pump, the self-sealing structure of the heat network circulation pump comprising:

[0010] A water intake pipeline, the inlet of which is used to communicate with an outlet pipeline of a heat network circulation pump having an outlet check valve;

[0011] A pressure regulating component, a filter component and a cooling component, wherein the pressure regulating component, the filter component and the cooling component are sequentially arranged in series on the water intake pipeline;

[0012] A water outlet pipe, the inlet of the water outlet pipe is connected with the outlet of the water intake pipe, and the outlet of the water outlet pipe is used to communicate with the mechanical sealing water inlet of the heat network circulation pump.

[0013] In some possible embodiments, the filter assembly includes a first filter screen, a first inlet valve, and a first outlet valve;

[0014] The first filter screen is arranged in series on the water intake pipeline, the first inlet valve is arranged on the inlet side of the first filter screen, and the first outlet valve is arranged on the outlet side of the first filter screen.

[0015] In some possible embodiments, the filter assembly further includes a second filter screen, a second inlet valve, and a second outlet valve;

[0016] The second filter screen is arranged in parallel between the inlet side and the outlet side of the first filter screen, the second inlet valve is arranged on the inlet side of the second filter screen, and the second outlet valve is arranged on the outlet side of the second filter screen.

[0017] In some possible embodiments, the filter assembly further includes a differential pressure gauge;

[0018] The differential pressure gauge is arranged in parallel between the inlet side and the outlet side of the first filter screen and / or the second filter screen.

[0019] In some possible embodiments, the filter assembly further includes a balancing gate valve; the balancing gate valve is arranged in parallel between the inlet side and the outlet side of the first filter screen and / or the second filter screen.

[0020] In some possible embodiments, the cooling assembly includes a cooler, a cooling water inlet pipe, and a cooling water return pipe;

[0021] The cooler is arranged in series on the water intake pipe, the inlet of the cooling water inlet pipe is used to communicate with a closed water source, the outlet of the cooling water inlet pipe is communicated with the inlet of the cooler, and the return port of the cooler is communicated with the inlet of the cooling water return pipe.

[0022] In some possible embodiments, the cooling assembly further includes a cooling water inlet valve and a cooling water outlet valve;

[0023] The cooling water inlet valve is arranged at the inlet side of the cooler, and the cooling water outlet valve is arranged at the outlet side of the cooler.

[0024] In some possible embodiments, the pressure regulating member is a pressure reducing valve.

[0025] In some possible embodiments, the self-sealing structure further includes a sealing water main valve;

[0026] The sealing water main valve is arranged at the inlet of the water intake pipeline.

[0027] In a second aspect, an embodiment of the present invention provides a heat network circulation pump, comprising the self-sealing structure described above.

[0028] The heat network circulation pump and its self-sealing structure in the embodiment of the present invention can ensure the stability of the heat network circulation pump's mechanical sealing water by using the water source of the heat network circulation pump's outlet pipe as the heat network circulation pump's mechanical sealing water. As long as the pump is running, it can provide sealing water, and the pump does not need sealing water when it is not running, so the water source is relatively stable. In addition, the water in the heat network system is chemically supplemented fresh water, so the water quality is relatively stable. Finally, the overpressure problem of the heat network system can be effectively solved. After changing to self-sealing, no external water source enters the heat network circulating water system, and the heat network system pressure will not increase, making the heat network system run more stably. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 It is a structural schematic diagram of the self-sealing structure of the heat network circulation pump according to an embodiment of the present invention. DETAILED DESCRIPTION

[0031] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the described embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work are within the scope of protection of the present invention.

[0032] Unless otherwise specified, the technical terms or scientific terms used in the embodiments of the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. "Including" or "comprising" used in the embodiments of the present invention neither limit the shapes, numbers, steps, actions, operations, components, originals and / or their groups mentioned, nor exclude the appearance or addition of one or more other different shapes, numbers, steps, actions, operations, components, originals and / or their groups, or the addition of these. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number and order of the indicated technical features. Thus, the features defined as "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the embodiments of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0033] Unless otherwise specifically stated, the relative arrangement of the components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be understood that for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship, and the techniques, methods and devices known to ordinary technicians in the relevant fields may not be discussed in detail, but where appropriate, the techniques, methods and devices shown should be considered as part of the authorized specification. In all examples shown and discussed here, any specific other examples may have different values. It should be noted that similar symbols and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0034] In the description of the embodiments of the present invention, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In the embodiments of the present invention, the schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in the embodiments of the present invention and the features of the different embodiments or examples, without contradiction.

[0035] Below, the exemplary embodiments according to the present invention will be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments of the present invention, and it should be understood that the present invention is not limited to the exemplary embodiments described here.

[0036] Figure 1 FIG. 1 is a schematic diagram of the self-sealing structure of the heat network circulation pump according to an embodiment of the present invention. Figure 1 As shown, a self-sealing structure 100 of a heat network circulation pump includes: a water intake pipe 110, a pressure regulating member 120, a filter assembly 130, a cooling assembly 140 and a water outlet pipe 150.

[0037] Specifically, Figure 1 As shown, the inlet of the water intake pipe 110 is used to communicate with the outlet pipe 200 of the heat network circulation pump having an outlet check valve. The pressure regulating member 120, the filter assembly 130 and the cooling assembly 140 are sequentially arranged in series on the water intake pipe 110. The inlet of the water outlet pipe 150 is communicated with the outlet of the water intake pipe 110, and the outlet of the water outlet pipe 150 is used to communicate with the mechanical sealing water inlet of the heat network circulation pump.

[0038] The self-sealing structure of the heat network circulation pump of the embodiment of the present invention can ensure the stability of the heat network circulation pump's mechanical sealing water by using the water source of the heat network circulation pump's outlet pipe as the heat network circulation pump's mechanical sealing water. As long as the pump is running, it can provide sealing water, and the pump does not need sealing water when it is not running, so the water source is relatively stable. In addition, the water in the heat network system is chemically supplemented fresh water, so the water quality is relatively stable. Finally, the overpressure problem of the heat network system can be effectively solved. After changing to self-sealing, no external water source enters the heat network circulating water system, and the heat network system pressure will not increase, making the heat network system run more stably.

[0039] For example, Figure 1 As shown, the filter assembly 130 includes a first filter screen 131, a first inlet valve 132 and a first outlet valve 133. The first filter screen 131 is arranged in series on the water intake pipe 110, the first inlet valve 132 is arranged at the inlet side of the first filter screen 131, and the first outlet valve 133 is arranged at the outlet side of the first filter screen 131.

[0040] The self-sealing structure of the heat network circulation pump of the embodiment of the present invention can effectively prevent impurities in the water from entering the mechanical seal system and damaging the mechanical seal through the first filter screen, thereby increasing the service life of the heat network circulation pump.

[0041] For example, Figure 1 As shown, the filter assembly 130 also includes a second filter 134, a second inlet valve 135 and a second outlet valve 136; the second filter 134 is arranged in parallel between the inlet side and the outlet side of the first filter 131, the second inlet valve 135 is arranged on the inlet side of the second filter 134, and the second outlet valve 136 is arranged on the outlet side of the second filter 134.

[0042] The self-sealing structure of the heat network circulation pump in the embodiment of the present invention can form a redundant design by setting a second filter screen in parallel between the two ends of the first filter screen. Once one of the filter screens is blocked, it can be switched to the other filter screen for filtering, thereby avoiding the heat network circulation pump from stopping due to filter blockage.

[0043] For example, Figure 1 As shown, the filter assembly 130 further includes a differential pressure gauge 137 , and the differential pressure gauge 137 is arranged in parallel between the inlet side and the outlet side of the first filter screen 131 and / or the second filter screen 134 .

[0044] The self-sealing structure of the heat network circulation pump of the embodiment of the present invention can monitor the pressure difference on both sides of the filter in real time through the provided differential pressure gauge. Under normal circumstances, this pressure difference should be maintained at a low level. When the filter gradually accumulates impurities, the resistance of water flowing through the filter increases, resulting in an increase in the pressure difference between the inlet and the outlet. By setting the alarm threshold of the differential pressure gauge, an alarm can be issued when the pressure difference exceeds a certain limit, prompting the operator that the filter is prone to clogging and needs to be cleaned or replaced. This helps to detect potential problems in advance and avoid system failures caused by filter clogging.

[0045] For example, Figure 1 As shown, the filter assembly 130 further includes a balancing gate valve 138 ; the balancing gate valve 138 is arranged in parallel between the inlet side and the outlet side of the first filter screen 131 and / or the second filter screen 134 .

[0046] The self-sealing structure of the heat network circulation pump of the embodiment of the present invention can accurately adjust the amount of water entering the filter through the provided balancing gate valve, ensuring that the water flows through the filter at an appropriate speed, neither too fast nor too slow. The appropriate flow rate helps to improve the filtering effect, while reducing the impact on the filter and extending its service life. In addition, in the case of multi-way water supply or parallel filter, the balancing gate valve can make the pressure of each water supply consistent by adjusting the flow of different paths, avoiding the problem of overload or underload of some filter screens due to uneven pressure.

[0047] For example, Figure 1 As shown, the cooling assembly 140 includes a cooler 141, a cooling water inlet pipe 142 and a cooling water return pipe 143. The cooler 141 is arranged in series on the water intake pipe 110, the inlet of the cooling water inlet pipe 142 is used to communicate with a closed water source, the outlet of the cooling water inlet pipe 142 is communicated with the inlet of the cooler 141, and the return port of the cooler 141 is communicated with the inlet of the cooling water return pipe 143.

[0048] The self-sealing structure of the heating network circulation pump in the embodiment of the present invention can cool the water from the outlet pipe of the heating network circulation pump through the provided cooler and then send it into the machine seal water inlet of the heating network circulation pump, thereby ensuring that the temperature of the machine seal water meets the requirements and avoiding damage to the heating network circulation pump due to excessive temperature, thereby increasing the service life of the heating network circulation pump.

[0049] For example, Figure 1 As shown, the cooling assembly 140 further includes a cooling water inlet valve 144 and a cooling water outlet valve 145. The cooling water inlet valve 144 is arranged at the inlet side of the cooler 141, and the cooling water outlet valve 145 is arranged at the outlet side of the cooler 141.

[0050] For example, Figure 1 As shown, the pressure regulating member 120 is a pressure reducing valve. The outlet pressure of the heat network circulation pump is up to 1.2MPa, and the machine seal water is required to be 0.5MPa. Therefore, a pressure reducing valve needs to be installed on the machine seal water to adjust the machine seal water pressure to 0.5MPa, thereby increasing the service life of the heat network circulation pump.

[0051] For example, Figure 1 As shown, the self-sealing structure 100 further includes a sealing water main valve 160. The sealing water main valve 160 is arranged at the inlet of the water intake pipeline 110.

[0052] Based on the same inventive concept, an embodiment of the present invention further provides a heat network circulation pump, including the self-sealing structure described above. For details, please refer to the relevant records above and will not be repeated here.

[0053] The heat network circulation pump of the embodiment of the present invention has the self-sealing structure described above. By using the water source of the outlet pipe of the heat network circulation pump as the mechanical seal water of the heat network circulation pump, it can ensure the stability of the mechanical seal water of the heat network circulation pump. As long as the pump is running, it can provide sealing water. When the pump is not running, it does not need sealing water, so the water source is relatively stable. In addition, the water in the heat network system is chemically supplemented fresh water, so the water quality is relatively stable. Finally, the overpressure problem of the heat network system can be effectively solved. After changing to self-sealing, no external water source enters the heat network circulating water system, and the pressure of the heat network system will not increase, making the operation of the heat network system more stable.

[0054] It is to be understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present invention, but the present invention is not limited thereto. For those of ordinary skill in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A self-sealing structure of a heat network circulation pump, characterized in that: The self-sealing structure of the heat network circulation pump comprises: A water intake pipeline, the inlet of which is used to communicate with an outlet pipeline of a heat network circulation pump having an outlet check valve; A pressure regulating component, a filter component and a cooling component, wherein the pressure regulating component, the filter component and the cooling component are sequentially arranged in series on the water intake pipeline; A water outlet pipe, the inlet of the water outlet pipe is connected with the outlet of the water intake pipe, and the outlet of the water outlet pipe is used to communicate with the mechanical sealing water inlet of the heat network circulation pump.

2. The self-sealing structure of the heat network circulation pump according to claim 1, characterized in that: The filter assembly includes a first filter screen, a first inlet valve and a first outlet valve; The first filter screen is arranged in series on the water intake pipeline, the first inlet valve is arranged on the inlet side of the first filter screen, and the first outlet valve is arranged on the outlet side of the first filter screen.

3. The self-sealing structure of the heat network circulation pump according to claim 2, characterized in that: The filter assembly also includes a second filter screen, a second inlet valve, and a second outlet valve; The second filter screen is arranged in parallel between the inlet side and the outlet side of the first filter screen, the second inlet valve is arranged on the inlet side of the second filter screen, and the second outlet valve is arranged on the outlet side of the second filter screen.

4. The self-sealing structure of the heat network circulation pump according to claim 3, characterized in that: The filter assembly also includes a differential pressure gauge; The differential pressure gauge is arranged in parallel between the inlet side and the outlet side of the first filter screen and / or the second filter screen.

5. The self-sealing structure of the heat network circulation pump according to claim 4, characterized in that: The filter assembly further includes a balancing gate valve; the balancing gate valve is arranged in parallel between the inlet side and the outlet side of the first filter screen and / or the second filter screen.

6. The self-sealing structure of the heat network circulation pump according to any one of claims 1 to 5, characterized in that: The cooling assembly includes a cooler, a cooling water inlet pipe and a cooling water return pipe; The cooler is arranged in series on the water intake pipe, the inlet of the cooling water inlet pipe is used to communicate with a closed water source, the outlet of the cooling water inlet pipe is communicated with the inlet of the cooler, and the return port of the cooler is communicated with the inlet of the cooling water return pipe.

7. The self-sealing structure of the heat network circulation pump according to claim 6, characterized in that: The cooling assembly also includes a cooling water inlet valve and a cooling water outlet valve; The cooling water inlet valve is arranged at the inlet side of the cooler, and the cooling water outlet valve is arranged at the outlet side of the cooler.

8. The self-sealing structure of the heat network circulation pump according to any one of claims 1 to 5, characterized in that: The pressure regulating member is a pressure reducing valve.

9. The self-sealing structure of a heat network circulation pump according to any one of claims 1 to 5, characterized in that: The self-sealing structure also includes a sealing water main valve; The sealing water main valve is arranged at the inlet of the water intake pipeline.

10. A heat network circulation pump, characterized in that: The self-sealing structure comprises the self-sealing structure according to any one of claims 1 to 9.

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