Cooking fume collecting system and high-pressure water feeding pump set

Abstract

The invention belongs to the technical field of boiler steam-water circulation systems, and discloses an oil fume collecting system and a high-pressure water feeding pump set. The oil smoke collecting system is applied to a boiler water feeding pump set, the boiler water feeding pump set comprises a high-voltage motor and a water feeding pump which are arranged in an equipment room and are in transmission connection through a hydraulic coupler, and the oil smoke collecting system comprises a first communicating pipeline, a second communicating pipeline, a discharging pipeline and a spraying piece. Compared with a traditional natural smoke exhaust mode, the lampblack collection system provided by the invention realizes active smoke exhaust by utilizing negative pressure formed by hot air flow velocity difference. By constructing the directional airflow channel and the pressure difference, the lampblack emission efficiency can be effectively improved, lampblack is prevented from being accumulated in the equipment room, then pollution of lampblack to the environment of the equipment room is reduced, and the aging risk caused by the fact that lampblack adheres to the surface of the equipment is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of boiler steam-water circulation systems, and particularly to an oil fume collection system and a high-pressure feed water pump set. Background Art

[0002] As the core link of energy conversion in the thermal power generation process, the boiler steam-water circulation system realizes power generation by heating water into high-temperature and high-pressure steam to drive the steam turbine to do work. The role of the high-pressure feed water pump set is to continuously supply feed water that meets the requirements of pressure and flow for this system, ensure the stable water level inside the boiler, and maintain the continuity of the steam-water circulation, thereby ensuring the stable and efficient operation of the entire thermal power generation system.

[0003] In the prior art, the high-pressure feed water pump set usually consists of a high-pressure motor, a hydraulic coupling, and a feed water pump as the core power components. Among them, the high-pressure motor serves as the power source, and by driving the hydraulic coupling, the speed of the feed water pump is adjusted to meet the feed water requirements under different working conditions of the boiler.

[0004] However, heat is generated during the conversion of electrical energy and mechanical energy in the internal winding of the high-pressure motor. When the hydraulic coupling is working, the oil between the pump impeller and the turbine is constantly stirred at high speed, and continuous conversion between kinetic energy and thermal energy occurs. The oil generates heat due to friction, and part of the oil is oxidized and cracked, generating oil fume.

[0005] In the prior art for smoke exhaust and heat dissipation treatment, for the oil fume generated by the hydraulic coupling, the natural smoke exhaust method is generally adopted. This method mainly relies on the natural convection of the air in the equipment room and the building ventilation structure, and with the help of the natural flow of the environmental air flow, the oil fume is first discharged into the equipment room and then slowly discharged. For the heat dissipation of the high-pressure motor, currently, generally, components such as a preset fan inside the high-pressure motor are used to drive the air to circulate inside the high-pressure motor, absorb the heat generated during the operation of the high-pressure motor, and the heated hot air is directly discharged into the equipment room through the air duct to ensure the normal working temperature of the high-pressure motor.

[0006] However, the above-mentioned prior art has many deficiencies in practical applications. For the natural smoke exhaust method adopted by the hydraulic coupling, relying only on the natural flow of the environmental air flow and lacking active power drive, the smoke exhaust efficiency is limited. As time goes by, the oil fume is difficult to be quickly discharged and accumulates in large quantities in the equipment room, which will not only pollute the equipment room environment but also adhere to the equipment surface, accelerating the aging of the equipment. In addition, the hot air discharged from the internal exhaust components of the motor to the outside is directly discharged into the equipment room, and the air circulation in the equipment room is slow, and the heat is difficult to quickly diffuse. As the hot air accumulates continuously, the local environment temperature in the equipment room continues to rise, which not only forms heat pollution but also affects the normal operating conditions of the surrounding equipment and shortens the service life of the equipment.

[0007] Therefore, the above problems need to be solved urgently. Summary of the Invention

[0008] The object of the present invention is to provide an oil fume collection system and a high-pressure feed water pump group, so as to effectively improve the oil fume emission efficiency, avoid the accumulation of oil fume in the equipment room, thereby reducing the pollution of the equipment room environment by oil fume, reducing the aging risk caused by oil fume adhering to the surface of the equipment. At the same time, it blocks the accumulation path of hot air in the equipment room, effectively controls the environmental temperature in the equipment room, eliminates the phenomenon of local thermal pollution, creates a stable operating environment for surrounding equipment, ensures the stability of the equipment operating conditions, and prolongs the overall service life of the equipment.

[0009] To achieve this purpose, the present invention adopts the following technical solutions:

[0010] An oil fume collection system, the oil fume collection system is applied to a boiler feed water pump group, the boiler feed water pump group includes a high-pressure motor and a feed water pump arranged in an equipment room, and the two are connected by a hydraulic coupling. The oil fume collection system includes a first communication pipeline, a second communication pipeline, an exhaust pipeline and a spraying member, wherein:

[0011] The exhaust pipeline includes an oil fume inlet and an oil fume outlet, and the oil fume outlet extends outside the equipment room;

[0012] One end of the first communication pipeline is connected to the air outlet of the high-pressure motor, and the other end is connected to the oil fume inlet; one end of the second communication pipeline is connected to the smoke exhaust port of the hydraulic coupling, and the other end is connected to the oil fume inlet;

[0013] The spraying member is arranged at the oil fume inlet, and the spraying member is configured to increase the flow rate of the hot air discharged from the first communication pipeline into the exhaust pipeline, so as to generate a negative pressure at the oil fume inlet to suck the oil fume in the second communication pipeline into the exhaust pipeline.

[0014] Preferably, the spraying member includes a spraying cavity, a first inlet, a second inlet and a spraying outlet. The first inlet and the second inlet are located on the same side and adjacent to each other of the spraying cavity, and the spraying outlet is located on the other side of the spraying cavity, wherein:

[0015] The first communication pipeline is connected to the first inlet to input the hot air discharged from the high-pressure motor into the spraying cavity; the first inlet gradually narrows along the hot air flow direction to increase the flow rate of the hot air input into the spraying cavity; the second communication pipeline is connected to the second inlet to input the oil fume discharged from the hydraulic coupling into the spraying cavity.

[0016] Preferably, the injection chamber includes an input section, a mixing section, and an output section distributed along the hot air flow direction. The input section gradually narrows along the hot air flow direction. The first inlet communicates with the largest side of the input section. The output section communicates with the smallest side of the input section. The output section gradually expands along the hot air flow direction. The smallest side of the output section communicates with the mixing section. The largest side of the output section is the injection outlet.

[0017] Preferably, the length of the discharge pipeline is adjustable.

[0018] Preferably, the discharge pipeline further includes a waste oil outlet arranged downward, and the waste oil outlet is used to discharge the oil-water mixture converged on the inner wall of the discharge pipeline.

[0019] Preferably, the discharge pipeline includes a vertically arranged extension pipe. The oil fume outlet is arranged on the upper side of the extension pipe, and the waste oil outlet is arranged on the lower side of the extension pipe.

[0020] Preferably, the first communication pipeline communicates with the air outlet of the high-pressure motor through a flow guide cover, and the flow guide cover is used to guide the hot air discharged from the air outlet of the high-pressure motor into the first communication pipeline.

[0021] Preferably, the second communication pipeline is made of a flexible pipe.

[0022] A high-pressure feed water pump group includes a high-pressure motor, a hydraulic coupling, and the above-mentioned oil fume collection system. The high-pressure motor and the hydraulic coupling are both arranged in the equipment room. The oil fume collection system is used to dissipate heat from the high-pressure motor and discharge the hot air to the outside of the equipment room. The oil fume collection system is also used to discharge the oil fume of the hydraulic coupling and discharge the oil fume to the outside of the equipment room.

[0023] Advantages of the present invention:

[0024] 1. The oil fume collection system provided by the present invention, compared with the traditional natural smoke exhaust method, realizes active smoke exhaust by using the negative pressure formed by the hot air flow velocity difference. By constructing a directional air flow channel and pressure difference, the oil fume discharge efficiency can be effectively improved, avoiding the accumulation of oil fume in the equipment room, thereby reducing the pollution of the equipment room environment by oil fume and reducing the aging risk caused by oil fume adhering to the equipment surface.

[0025] 2. The hot air discharged from the high-voltage motor is no longer directly discharged into the equipment room, but participates in the formation of negative pressure through the first connecting pipeline and is finally discharged outside the equipment room, thereby blocking the accumulation path of hot air in the equipment room, effectively controlling the environmental temperature in the equipment room, eliminating the phenomenon of local thermal pollution, creating a stable operating environment for the surrounding equipment, ensuring the stability of the equipment operating conditions, and extending the overall service life of the equipment. Brief Description of the Drawings

[0026] Figure 1 is a schematic structural diagram of the oil fume collection system provided by the present invention;

[0027] Figure 2 is a schematic structural diagram of the spraying member provided by the present invention;

[0028] Figure 3 is a schematic structural diagram of the spraying cavity provided by the present invention.

[0029] In the figure:

[0030] 100, high-voltage motor; 200, hydraulic coupling;

[0031] 1, first connecting pipeline; 11, flow guide cover;

[0032] 2, second connecting pipeline;

[0033] 3, discharge pipeline; 31, oil fume outlet; 32, waste oil outlet; 33, extension pipe;

[0034] 4, spraying member; 41, spraying cavity; 411, input section; 412, mixing section; 413, output section; 42, first inlet; 43, second inlet; 44, spraying outlet. Detailed Embodiments

[0035] Before explaining any embodiment of the present application in detail, it should be understood that the present application is not limited to the structural details and component arrangements described in the following description or shown in the above drawings.

[0036] In the present application, the terms "include", "comprise", "have" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the phrase "including one..." does not exclude the existence of additional identical elements in the process, method, article or device including that element.

[0037] In this application, the term "and / or" describes the association relationship of associated objects and indicates that there can be three relationships. For example, a centrifugal vortex magnetic pump and / or a centrifugal vortex magnetic pump can represent three situations: the sole existence of a centrifugal vortex magnetic pump, the simultaneous existence of a centrifugal vortex magnetic pump and a centrifugal vortex magnetic pump, and the sole existence of a centrifugal vortex magnetic pump. Additionally, in this application, the character " / " generally indicates that the associated objects before and after are in an "and / or" relationship.

[0038] In this application, the terms "connect", "combine", "couple", and "mount" can be direct connections, combinations, couplings, or mounts, or they can be indirect connections, combinations, couplings, or mounts. Among them, for example, a direct connection means that two parts or components are connected together without the need for an intermediate member, and an indirect connection means that two parts or components are respectively connected to at least one intermediate member, and these two parts or components are connected through the intermediate member. In addition, "connect" and "couple" are not limited to physical or mechanical connections or couplings and can include electrical connections or couplings.

[0039] In this application, those of ordinary skill in the art will understand that relative terms used in combination with a quantity or condition (such as "about", "approximately", "substantially", etc.) are intended to include the stated value and have the meaning indicated by the context. For example, such relative terms at least include the degree of error associated with the measurement of a specific value, the tolerances caused by manufacturing, assembly, and use related to a specific value, etc. Such terms should also be considered to disclose a range defined by the absolute values of two endpoints. Relative terms can refer to a plus or minus a certain percentage (such as 1%, 5%, 10% or more) of the indicated value. Numerical values without the use of relative terms should also be disclosed as specific values with tolerances. In addition, when expressing a relative angular positional relationship (such as substantially parallel, substantially perpendicular), "substantially" can refer to a plus or minus a certain number of degrees (such as 1 degree, 5 degrees, 10 degrees or more) based on the indicated angle.

[0040] In this application, those of ordinary skill in the art will understand that the functions performed by a component can be performed by one component, multiple components, one part, or multiple parts. Similarly, the functions performed by a part can also be performed by one part, one component, or a combination of multiple parts.

[0041] In the present application, the terms "upper", "lower", "left", "right", "front", "back" and other directional words are described based on the orientation and positional relationship shown in the accompanying drawings, and should not be understood as limiting the embodiments of the present application. In addition, in the context, it is also necessary to understand that when it is mentioned that an element is connected to another element "upper" or "lower", it can not only be directly connected to another element "upper" or "lower", but also indirectly connected to another element "upper" or "lower" through an intermediate element. It should also be understood that directional words such as upper side, lower side, left side, right side, front side, back side, etc. not only represent the positive orientation, but can also be understood as the lateral orientation. For example, the bottom can include directly below, lower left, lower right, lower front, and lower back, etc.

[0042] See also Figures 1 to 3 The present embodiment provides an oil fume collection system, which is applied to a boiler feed water pump group. The boiler feed water pump group includes a high-voltage motor 100 and a feed water pump arranged in an equipment room, and the two are connected by a hydraulic coupling 200. The oil fume collection system includes a first connecting pipeline 1, a second connecting pipeline 2, a discharge pipeline 3 and an injection member 4.

[0043] The exhaust pipeline 3 includes an oil fume inlet and an oil fume outlet 31, and the oil fume outlet 31 extends outside the equipment room; one end of the first connecting pipeline 1 is connected to the air outlet of the high-voltage motor 100, and the other end is connected to the oil fume inlet; one end of the second connecting pipeline 2 is connected to the exhaust port of the hydraulic coupler 200, and the other end is connected to the oil fume inlet. The injection member 4 is arranged at the oil fume inlet, and the injection member 4 is configured to increase the flow rate of the hot air discharged from the first connecting pipeline 1 into the exhaust pipeline 3, so that a negative pressure is generated at the oil fume inlet to suck the oil fume in the second connecting pipeline 2 into the exhaust pipeline 3.

[0044] When the high-speed hot air flows into the oil fume inlet of the exhaust pipe 3 through the first connecting pipe 1, a negative pressure area is formed at the oil fume inlet according to the Bernoulli principle. The negative pressure effect causes the oil fume in the second connecting pipe 2 to be sucked into the exhaust pipe 3 under the action of the pressure difference, and discharged through the oil fume outlet 31 extending outside the equipment room. In this process, the hot air discharged by the high-voltage motor 100 not only meets its own heat dissipation needs, but also provides power for the oil fume discharge of the hydraulic coupler 200, forming an integrated heat dissipation and exhaust working mechanism.

[0045] Compared with the traditional natural smoke exhaust method, the negative pressure formed by the hot air velocity difference is used to achieve active smoke exhaust. By constructing a directional airflow channel and pressure difference, the oil fume exhaust efficiency can be effectively improved, and the accumulation of oil fume in the equipment room can be avoided, thereby reducing the pollution of the equipment room environment by oil fume and reducing the aging risk caused by oil fume adhering to the equipment surface.

[0046] Meanwhile, the hot air discharged by the high-voltage motor 100 is no longer directly discharged into the equipment room, but participates in the formation of negative pressure through the first communication pipeline 1 and is finally discharged outside the equipment room, thus blocking the accumulation path of hot air in the equipment room, effectively controlling the environmental temperature in the equipment room, eliminating the phenomenon of local heat pollution, creating a stable operating environment for the surrounding equipment, ensuring the stability of the equipment operating conditions, and prolonging the overall service life of the equipment.

[0047] To improve the efficiency of oil fume discharge, the oil fume collection system further includes a spraying member 4 provided at the oil fume inlet. The spraying member 4 is configured to increase the flow rate of the hot air discharged from the first communication pipeline 1 into the discharge pipeline 3.

[0048] With such a setting, by actively increasing the flow rate of the hot air flow through the spraying member 4, the actual flow rate in the first communication pipeline 1 is significantly higher than the original natural discharge flow rate, thereby increasing the difference in the flow rate of the oil fume in the second communication pipeline 2. A stronger flow rate difference can promote an increase in the absolute value of the negative pressure at the oil fume inlet, forming a more stable pressure gradient. Even when the natural ventilation condition in the equipment room is poor or the oil fume generation amount of the hydraulic coupling 200 fluctuates, it can still ensure that the oil fume in the second communication pipeline 2 is efficiently sucked into the discharge pipeline 3.

[0049] Specifically, the spraying member 4 includes a spraying cavity 41, a first inlet 42, a second inlet 43, and a spraying outlet 44. The first inlet 42 and the second inlet 43 are located on the same side and adjacent to each other of the spraying cavity 41, and the spraying outlet 44 is located on the other side of the spraying cavity 41. The first communication pipeline 1 is communicated with the first inlet 42 to input the hot air discharged by the high-voltage motor 100 into the spraying cavity 41; the first inlet 42 gradually narrows along the hot air flow direction to increase the flow rate of the hot air input into the spraying cavity 41; the second communication pipeline 2 is communicated with the second inlet 43 to input the oil fume discharged by the hydraulic coupling 200 into the spraying cavity 41.

[0050] It can be understood that the design of the first inlet 42 gradually narrowing along the hot air flow direction follows the continuity equation and Bernoulli's principle. The continuity equation shows that in the steady flow of an incompressible fluid, the flow rate of the fluid passing through different cross-sections remains constant. When the cross-sectional area of the first inlet 42 gradually decreases, the flow rate of the hot air discharged by the high-voltage motor 100 will inevitably increase. At the same time, according to Bernoulli's principle, the increase in the flow rate will cause the dynamic pressure of the fluid to increase and the static pressure to decrease, thereby forming a negative pressure environment in the spraying cavity 41.

[0051] As described above, first, the suction ability of the oil fume discharged from the hydrodynamic coupler 200 into the second communication pipeline 2 can be significantly enhanced. Due to the negative pressure in the injection chamber 41, in the second communication pipeline 2 connected to the second inlet 43, the oil fume is more likely to be sucked into the injection chamber 41 under the action of the pressure difference, and after being mixed with the high-speed hot air, it is discharged through the injection outlet 44, thereby improving the smoke exhaust efficiency, effectively avoiding the accumulation of oil fume in the equipment room, reducing the pollution of the equipment room environment by the oil fume and the erosion of the equipment surface, and reducing the risk of equipment aging.

[0052] Secondly, the efficient mixing and transportation of hot air and oil fume are realized. The first inlet 42 and the second inlet 43 are adjacent and both communicate with the injection chamber 41, enabling the high-speed hot air and the oil fume to fully contact and mix in the injection chamber 41. The mixed gas-liquid two-phase flow, driven by the high-speed hot air, is discharged into the discharge pipeline 3 through the injection outlet 44 at a higher flow rate, further improving the flow efficiency of the entire discharge system, ensuring the smoothness of oil fume discharge, and avoiding problems such as oil fume retention and blockage in the discharge pipeline 3.

[0053] Furthermore, no additional power device is required. The injection part 4 realizes its function based on the utilization of the fluid's own characteristics and its special cavity and inlet structure, without relying on an external power supply or adding power equipment, reducing the energy consumption and operating cost of the system. At the same time, the system structure is simplified, the number of failure points is reduced, and the reliability and maintainability of the equipment are improved.

[0054] It should be noted that in other embodiments, the injection part 4 can also adopt an independent fan or power device to increase the flow rate of the hot air discharged from the first communication pipeline 1 into the discharge pipeline 3, so as to achieve forced oil fume discharge. This implementation does not have specific requirements and restrictions.

[0055] To further improve the efficiency of oil fume discharge, the injection chamber 41 includes an input section 411, a mixing section 412, and an output section 413 distributed along the hot air flow direction. The input section 411 gradually narrows along the hot air flow direction. The first inlet 42 communicates with the largest side of the input section 411. The output section 413 communicates with the smallest side of the input section 411. The output section 413 gradually expands along the hot air flow direction. The smallest side of the output section 413 communicates with the mixing section 412, and the largest side of the output section 413 is the injection outlet 44.

[0056] It can be understood that the input section 411 gradually narrows along the hot air flow direction, similar to the contraction section of a Venturi tube. According to the Venturi principle, when the hot air flows through the input section 411, due to the gradually decreasing pipe diameter, its flow rate will continuously increase. At the same time, the increase in the flow rate will cause the pressure to decrease, forming a negative pressure in the injection chamber 41, thereby significantly improving the suction efficiency of the oil fume.

[0057] It can also be understood that the output section 413 gradually expands along the hot air flow direction, similar to the diffuser section of a Venturi tube. According to the Venturi principle, in the diffuser section, the air flow velocity gradually decreases and the pressure gradually recovers. As a result, the hot air and oil fume mixed air flow passing through the mixing section 412 can smoothly reduce the flow velocity and increase the pressure in the output section 413, and then more smoothly discharge from the ejection outlet 44 into the discharge pipeline 3.

[0058] Generally speaking, in different application scenarios, the installation space and layout requirements of the oil fume collection system are different. To enable the oil fume collection system to better adapt to various complex installation environments, the length of the discharge pipeline 3 is adjustable. The discharge pipeline 3 with adjustable length can be flexibly adjusted according to the actual space limitation and the placement position of the equipment, better adapt to various complex installation environments, reduce the installation difficulties caused by insufficient space or unreasonable layout, and improve the applicability and installability of the system.

[0059] More importantly, by adjusting the length of the discharge pipeline 3, the flow characteristics of the air flow in the pipeline can be changed. For example, in some cases, appropriately extending the discharge pipeline 3 can enable the hot air and oil fume to be fully mixed and cooled in the pipeline, which helps to improve the purification effect of the oil fume; while in other cases, shortening the discharge pipeline 3 can reduce the air flow resistance, improve the discharge efficiency, ensure that the oil fume can be discharged quickly and smoothly, avoid accumulation in the pipeline, and reduce the risk of blockage.

[0060] It should be noted that the discharge pipeline 3 can adopt existing flexible telescopic pipe structures, sleeve telescopic structures, etc., which will not be elaborated here.

[0061] It is worth noting that the oil fume contains a large amount of oil and water, which will gradually condense and converge into an oil-water mixture on the inner wall of the pipeline during the discharge process. If not discharged in time, these mixtures will accumulate continuously, resulting in a smaller inner diameter of the pipeline, increasing the air flow resistance, and ultimately may cause the pipeline to be blocked.

[0062] Therefore, in this embodiment, the discharge pipeline 3 further includes a waste oil outlet 32 arranged downward, and the waste oil outlet 32 is used to discharge the oil-water mixture converging on the inner wall of the discharge pipeline 3. The setting of the waste oil outlet 32 can discharge the oil-water mixture in time, keep the pipeline unobstructed, and ensure the normal operation of the oil fume collection system.

[0063] In particular, the discharge pipeline 3 includes an extension pipe 33 arranged vertically. A fume outlet 31 is arranged on the upper side of the extension pipe 33, and a waste oil outlet 32 is arranged on the lower side of the extension pipe 33. With such a setting, since the extension pipe 33 is arranged vertically and the waste oil outlet 32 is located on the lower side, the oil-water mixture naturally flows downward under the action of gravity, and is more likely to converge and discharge from the waste oil outlet 32. At the same time, during the rising process of the oil fume, due to the buoyancy of the hot air, it is easier to discharge from the fume outlet 31 located on the upper side.

[0064] In addition, the vertical extension pipe 33 provides a relatively long path and space for the separation of oil fume and waste oil. During the upward movement of the oil fume, the speed gradually decreases, and the oil droplets and water droplets in it are more likely to be separated from the oil fume gas under the action of gravity and the adsorption of the pipe wall, and converge downward to the waste oil outlet 32. Compared with the horizontal pipeline, the vertical extension pipe 33 can make more effective use of gravity for gas-liquid separation, improve the separation effect, reduce the oil content in the discharged oil fume, and is beneficial to subsequent oil fume purification treatment and up-to-standard discharge.

[0065] To enable the hot air to enter the first communication pipeline 1 smoothly, the first communication pipeline 1 is connected to the air outlet of the high-pressure motor 100 through a flow guide cover 11, and the flow guide cover 11 is used to guide the hot air discharged from the air outlet of the high-pressure motor 100 into the first communication pipeline 1. It can be understood that the flow guide cover 11 can direct the hot air, so that the hot air enters the first communication pipeline 1 according to a specific direction and path, thereby reducing the generation of air flow disorder and eddy current, reducing the air flow resistance, and improving the operation efficiency of the ventilation system. In addition, the hot air enters the first communication pipeline 1 orderly under the guidance of the flow guide cover 11, avoiding problems such as local overheating or deformation caused by the direct impact of the hot air on the pipeline. At the same time, the flow guide cover 11 can play a certain buffering and transition role, enabling the hot air to enter the first communication pipeline 1 smoothly, reducing the impact and vibration on the pipeline system, thereby prolonging the service life of the pipeline and related connection components and reducing the maintenance cost.

[0066] It should be noted that the hydraulic coupler 200 will generate vibrations during operation due to the rotation of the impeller, hydraulic transmission, etc. For this reason, in this embodiment, the second communication pipeline 2 is made of a flexible pipe. The flexible pipe has good flexibility and elasticity, can effectively absorb and buffer these vibrations, reduce the impact of vibrations on the connected pipelines and equipment, avoid pipeline loosening, wear and even rupture caused by long-term vibrations, and prolong the service life of the second communication pipeline 2. In addition, the hydraulic coupler 200 may have a small displacement during operation due to reasons such as thermal expansion and contraction, equipment installation error or foundation settlement. The flexible pipe can adapt to these displacement changes through its own bending and deformation, ensuring the sealing and stability of the pipeline connection, and preventing problems such as stress concentration and leakage of the pipeline caused by displacement.

[0067] It should be noted that the specific material of the flexible pipe can be selected according to the actual application scenario, such as rubber hoses, plastic hoses, etc., and will not be elaborated here.

[0068] This embodiment further provides a high-pressure feed water pump set, which includes a high-pressure motor 100, a hydraulic coupling 200, and the above-mentioned oil fume collection system. The high-pressure motor 100 and the hydraulic coupling 200 are both arranged in the equipment room. The oil fume collection system is used to dissipate heat from the high-pressure motor 100 and discharge the hot air to the outside of the equipment room. The oil fume collection system is also used to discharge the oil fume from the hydraulic coupling 200 and release the oil fume to the outside of the equipment room.

[0069] It can be understood that the high-pressure feed water pump set including the above-mentioned oil fume collection system can effectively improve the oil fume discharge efficiency, avoid the accumulation of oil fume in the equipment room, thereby reducing the pollution of the equipment room environment by the oil fume, and reducing the aging risk caused by the oil fume adhering to the equipment surface. In addition, the high-pressure feed water pump set including the above-mentioned oil fume collection system blocks the accumulation path of hot air in the equipment room, effectively controls the environmental temperature in the equipment room, eliminates the phenomenon of local heat pollution, creates a stable operating environment for the surrounding equipment, ensures the stability of the equipment operating conditions, and extends the overall service life of the equipment.

[0070] Obviously, the above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the implementation manners of the present invention. For those of ordinary skill in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A fume collection system, the fume collection system being applied to a boiler feed water pump group, the boiler feed water pump group comprising a high-voltage motor (100) and a feed water pump arranged in an equipment room, the two being connected by a hydraulic coupling (200), characterized in that: The oil fume collection system comprises a first connecting pipeline (1), a second connecting pipeline (2), an exhaust pipeline (3) and an injection member (4), wherein: The exhaust pipeline (3) comprises an oil fume inlet and an oil fume outlet (31), and the oil fume outlet (31) extends outside the equipment room; One end of the first connecting pipe (1) is connected to the air outlet of the high-voltage motor (100), and the other end is connected to the oil fume inlet; one end of the second connecting pipe (2) is connected to the exhaust port of the hydraulic coupler (200), and the other end is connected to the oil fume inlet; The injection member (4) is arranged at the oil fume inlet, and is configured to increase the flow rate of the hot air discharged from the first connecting pipe (1) into the exhaust pipe (3), so as to generate negative pressure at the oil fume inlet to suck the oil fume in the second connecting pipe (2) into the exhaust pipe (3).

2. The oil fume collection system according to claim 1, characterized in that: The injection member (4) comprises an injection chamber (41), a first inlet (42), a second inlet (43) and an injection outlet (44), wherein the first inlet (42) and the second inlet (43) are located on the same side of the injection chamber (41) and are adjacent to each other, and the injection outlet (44) is located on the other side of the injection chamber (41), wherein: The first connecting pipe (1) is connected to the first inlet (42) so as to input the hot gas exhausted by the high-voltage motor (100) into the injection chamber (41); the first inlet (42) is gradually narrowed along the hot gas flow direction so as to increase the flow rate of the hot gas input into the injection chamber (41); the second connecting pipe (2) is connected to the second inlet (43) so as to input the oil smoke exhausted by the hydraulic coupler (200) into the injection chamber (41).

3. The oil fume collection system according to claim 2, characterized in that: The injection chamber (41) comprises an input section (411), a mixing section (412) and an output section (413) distributed along the hot gas flow direction; the input section (411) gradually shrinks along the hot gas flow direction; the first inlet (42) is connected to the maximum side of the input section (411); the output section (413) is connected to the minimum side of the input section (411); the output section (413) gradually expands along the hot gas flow direction; the minimum side of the output section (413) is connected to the mixing section (412); and the maximum side of the output section (413) is the injection outlet (44).

4. The oil fume collection system according to claim 1, characterized in that: The length of the discharge pipeline (3) is adjustable.

5. The oil fume collection system according to claim 1, characterized in that: The discharge pipeline (3) further comprises a waste oil outlet (32) arranged downwards, wherein the waste oil outlet (32) is used to discharge the oil-water mixture gathered on the inner wall of the discharge pipeline (3).

6. The oil fume collection system according to claim 5, characterized in that: The exhaust pipeline (3) comprises a vertically arranged extension pipe (33), the upper side of the extension pipe (33) is provided with the oil fume outlet (31), and the lower side of the extension pipe (33) is provided with the waste oil outlet (32).

7. The oil fume collection system according to claim 1, characterized in that: The first connecting pipeline (1) is connected to the air outlet of the high-voltage motor (100) through a deflector (11), and the deflector (11) is used to guide hot air discharged from the air outlet of the high-voltage motor (100) into the first connecting pipeline (1).

8. The oil fume collection system according to claim 1, characterized in that: The second connecting pipeline (2) is made of a flexible pipe.

9. A high-pressure water supply pump set, characterized in that: The high-pressure water supply pump group comprises a high-pressure motor (100), a hydraulic coupling (200) and an oil fume collection system as described in any one of claims 1 to 8, wherein the high-pressure motor (100) and the hydraulic coupling (200) are both arranged in an equipment room, and the oil fume collection system is used to dissipate the heat of the high-pressure motor (100) and discharge the hot air to the outside of the equipment room, and the oil fume collection system is also used to discharge the oil fume of the hydraulic coupling (200) and discharge the oil fume to the outside of the equipment room.

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