A centrifugal pump arrangement

Abstract

The application belongs to the technical field of centrifugal pumps, and provides a centrifugal pump device, which comprises a centrifugal pump body, a low-pressure area and a high-pressure area are arranged in the centrifugal pump body, a water inlet and an exhaust valve on the centrifugal pump body are located in the low-pressure area, and a water outlet is located in the high-pressure area; a flow guide plate assembly is arranged in the low-pressure area of the centrifugal pump, the flow guide plate assembly comprises a port ring cover plate, a flow guide transition plate arranged on one side of the port ring cover plate towards the low-pressure area, and a circular arc flow guide plate; one end of the circular arc flow guide plate is connected with the flow guide transition plate, the flow guide transition plate is arranged at the water inlet, and an opening is arranged between the other end of the circular arc flow guide plate and the flow guide transition plate; a water passing hole is arranged at the center of the port ring cover plate, liquid entering the water inlet enters the low-pressure area in a cavity between the flow guide plate assembly and the centrifugal pump body, and passes through the water passing hole to enter the high-pressure area.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of pump, and particularly relates to a centrifugal pump device. BACKGROUND

[0002] In a wall-hanging stove system, because the wall-hanging stove system generally has long pipelines and many loops, a centrifugal pump needs to be installed as a power device. Air in the medium water will inevitably enter the system, and the air existing in the system will cause cavitation, noise, reduce the hydraulic performance of the centrifugal pump, affect the service life of the stove, and even cause the stove to dry burning, and finally cause the stove to be damaged. The centrifugal pump is installed in the wall-hanging stove system as a power device.

[0003] In the existing centrifugal pump, some do not involve the exhaust function, and rely on the water drain valve in the pipeline to exhaust, but the exhaust effect is poor, the exhaust time is long, and the water at the water drain valve is sprayed outwards during the exhaust process. Some involve an exhaust device, but the exhaust device has poor exhaust effect, sprays water outwards from the exhaust during the exhaust process, or has large noise, and has cavitation problem, which affects the service life of the wall-hanging stove. SUMMARY

[0004] In view of the deficiencies in the prior art, the purpose of the present application is to provide a centrifugal pump device, which separates gas and liquid in the wall-hanging stove system by designing a flow guide plate structure to guide the liquid in the pump and reasonably designing the position of the exhaust valve.

[0005] To achieve this purpose, the following technical solutions are adopted in the present application:

[0006] A centrifugal pump device, comprising a centrifugal pump body, a low-pressure area and a high-pressure area are arranged in the centrifugal pump body, a water inlet and an exhaust valve on the centrifugal pump body are located in the low-pressure area, and a water outlet is located in the high-pressure area.

[0007] A flow guide plate assembly is arranged in the low-pressure area of the centrifugal pump, the flow guide plate assembly comprises a port ring cover plate, a flow guide transition plate arranged on one side of the port ring cover plate facing the low-pressure area, and a circular arc flow guide plate.

[0008] One end of the circular arc flow guide plate is connected with the flow guide transition plate, the flow guide transition plate is arranged at the water inlet, and an opening is arranged between the other end of the circular arc flow guide plate and the flow guide transition plate.

[0009] A water passing hole is arranged at the center of the port ring cover plate, liquid entering the water inlet enters the low-pressure area in the cavity between the flow guide plate assembly and the centrifugal pump body, and enters the high-pressure area through the water passing hole.

[0010] As preferred, a partition plate is further arranged on the mouth ring cover plate, the partition plate is arranged at the front end of the exhaust valve, the partition plate is spaced apart from the circular arc guide plate by a first preset distance L1, the partition plate is spaced apart from the centrifugal pump body by a second preset distance L2, the partition plate and the circular arc guide plate are spaced apart, and the partition plate and the circular arc guide plate form a first water passing channel.

[0011] As preferred, the partition plate is integrally arranged with the mouth ring cover plate.

[0012] As preferred, the partition plate and the central axis of the exhaust valve are at a first preset angle α1, wherein 30°≤α1≤60°.

[0013] As preferred, the bottom end of the partition plate is arranged on the mouth ring cover plate, and a reinforcing rib is arranged between the partition plate and the mouth ring cover plate.

[0014] As preferred, the central axis of the exhaust valve is perpendicular to the central axis of the water inlet, and the included angle Q between the central axis of the exhaust valve and the central axis of the water outlet ranges from 0° to 60°.

[0015] As preferred, an exhaust hole is arranged on the side wall in the low-pressure area of the exhaust valve, and the area S of the exhaust hole ranges from 5*5 mm² to 15*15 mm².

[0016] As preferred, the central axis of the exhaust valve is parallel to the central axis of the water outlet, and the distance L between the bottom edge of the exhaust valve and the highest point of the high-pressure area of the water outlet in the vertical direction ranges from 17 mm to 25 mm.

[0017] As preferred, the axial distance N between the central axis of the exhaust valve and the central axis of the water outlet of the centrifugal pump body ranges from 15 mm to 50 mm.

[0018] As preferred, the radial distance M between the central axis of the exhaust valve and the central axis of the water outlet of the centrifugal pump body ranges from 10 mm to 80 mm.

[0019] Compared with the prior art, the present application has the following beneficial effects:

[0020] In the present application, the partition plate is arranged on the guide plate assembly, the partition plate is arranged at the front end of the exhaust valve, when the gas inside the liquid passes through the partition plate, the partition plate disperses the gas bubbles in the water flow and collects them, the water flow enters the high-pressure area of the centrifugal pump body from the water passing hole, avoiding the direct impact of the water inlet on the exhaust valve, and avoiding the generation of vortex noise.

[0021] By setting up a flow guide plate and an arc-shaped flow guide plate, the liquid in the inlet is guided. The flow through these plates stabilizes the flow within the cavity between the centrifugal pump body and the flow guide plates. Air bubbles in the water flow are dispersed by the baffles, preventing large bubbles from directly impacting the exhaust valve, thus reducing noise. Simultaneously, because the bubbles are dispersed, large bubbles are prevented from entering the high-pressure area and causing cavitation impact on the impeller, thereby extending the service life of the wall-hung boiler.

[0022] The medium in the system is powered by a centrifugal pump, which simultaneously discharges gases from the medium, reduces noise and cavitation, improves furnace efficiency, and extends furnace service life. Attached Figure Description

[0023] Figure 1 This is a structural schematic diagram of the centrifugal pump device in the present invention from a first angle.

[0024] Figure 2 This is a schematic diagram of the centrifugal pump device in the present invention from a second angle;

[0025] Figure 3 This is a schematic diagram of the centrifugal pump device from a third angle in this invention;

[0026] Figure 4 This is a front view of the centrifugal pump device in this invention;

[0027] Figure 5 This is a longitudinal sectional view of the centrifugal pump device in this invention;

[0028] Figure 6 This is a first transverse sectional view of the centrifugal pump device in this invention;

[0029] Figure 7 This is a second transverse sectional view of the centrifugal pump device in this invention;

[0030] Figure 8 For the present invention Figure 4 Side view;

[0031] Figure 9 For the present invention Figure 4 The right view;

[0032] Figure 10 This is a schematic diagram of the first angle of the guide vane assembly in this invention;

[0033] Figure 11a This is a schematic diagram of the second angle of the guide vane assembly in this invention;

[0034] Figure 11b This is a schematic diagram of the third angle of the guide vane assembly in this invention;

[0035] Figure 12 A sectional view of the flow guide plate assembly in the present application;

[0036] Figure 13 A simulated cloud picture of the diameter of the water inlet chamber of the centrifugal pump device in the present application as the original size;

[0037] Figure 14 A simulated cloud picture of the diameter of the water inlet chamber of the centrifugal pump device in the present application reduced by 4mm;

[0038] Figure 15 A simulated cloud picture of the diameter of the water inlet chamber of the centrifugal pump device in the present application reduced by 10mm

[0039] Figure 16 A simulated cloud picture of the diameter of the water inlet chamber of the centrifugal pump device in the present application reduced by 14mm;

[0040] Figure 17 A simulated cloud picture of the diameter of the water inlet chamber of the centrifugal pump device in the present application reduced by 20mm;

[0041] Figure 18 An angle Q = 15° between the center axis of the exhaust valve 5 of the centrifugal pump device in the present application and the center axis of the water outlet 3;

[0042] Figure 19 An angle Q = 30° between the center axis of the exhaust valve 5 of the centrifugal pump device in the present application and the center axis of the water outlet 3;

[0043] Figure 20 An angle Q = 45° between the center axis of the exhaust valve 5 of the centrifugal pump device in the present application and the center axis of the water outlet 3;

[0044] Figure 21 An angle Q = 60° between the center axis of the exhaust valve 5 of the centrifugal pump device in the present application and the center axis of the water outlet 3.

[0045] Wherein, 1, centrifugal pump body; 20, low pressure area; 30, high pressure area; 2, water inlet; 3, water outlet;

[0046] 4, flow guide plate assembly; 41, ring cover plate; 42, flow guide transition plate; 43, circular arc flow guide plate; 44, water passage hole; 45, partition plate; 46, reinforcing rib;

[0047] 5, exhaust valve; 50, exhaust hole; 51, backflow hole. DETAILED DESCRIPTION

[0048] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some but not all of the embodiments of the present application. The components of the embodiments of the present application generally described and shown in the drawings can be arranged and designed in various different configurations.

[0049] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of the application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work are within the scope of protection of the present application.

[0050] It should be noted that: similar reference numerals and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0051] In the description of the present application, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship when the product of the present application is usually placed, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" and the like are only used to distinguish the description and cannot be understood as indicating or implying relative importance. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0052] In the description of the present application, it should also be noted that, unless otherwise specified and limited, the terms "provided", "connected" should be understood broadly, for example, it can be fixedly connected, or detachably connected, or integrally connected; it can be mechanically connected, or electrically connected. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0053] In the present application, unless otherwise explicitly specified and limited, "on" or "under" of a first feature to a second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, "on", "above" and "over" of a first feature to a second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the first feature is higher in horizontal height than the second feature. "Under", "below" and "underneath" of a first feature to a second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the first feature is lower in horizontal height than the second feature.

[0054] Embodiments of the present application are described in detail below with reference to examples shown in the attached drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary and are only used to explain the present application, and cannot be understood as a limitation of the present application.

[0055] To solve the existing pump working, the gas in the circulating system is discharged, and to reduce the noise and cavitation when the exhaust, improve the service life of the pump. As shown in Figures 1-12 The embodiment provides a centrifugal pump device, which comprises a centrifugal pump body 1, a low-pressure area 20 and a high-pressure area 30 are arranged in the centrifugal pump body 1, a water inlet 2 and an exhaust valve 5 on the centrifugal pump body 1 are located in the low-pressure area 20, and a water outlet 3 is located in the high-pressure area 30.

[0056] The low-pressure area 20 of the centrifugal pump is provided with a guide plate assembly 4, and the guide plate assembly 4 comprises a port ring cover plate 41, a guide transition plate 42 arranged on one side of the port ring cover plate 41 towards the low-pressure area 20, and a circular arc guide plate 43.

[0057] One end of the circular arc guide plate 43 is connected with the guide transition plate 42, the guide transition plate 42 is arranged at the water inlet 2, and an opening is arranged between the other end of the circular arc guide plate 43 and the guide transition plate 42.

[0058] A water passing hole 44 is arranged at the center of the port ring cover plate 41, liquid entering the water inlet 2 enters the low-pressure area 20 between the guide plate assembly 4 and the centrifugal pump body 1, and under the guide of the guide transition plate 42 and the circular arc guide plate 43, the liquid enters the water passing hole 44 on the port ring cover plate 41 through the opening between the two, and then enters the high-pressure area 30. As shown in Figure 5 The area in the left red box is the low-pressure area 20, and the area in the right red box is the high-pressure area 30.

[0059] The circular arc guide plate 43 in the embodiment is part of a circular ring-shaped thin-walled structure.

[0060] As Figure 6 shown in the figure, the arrow shows the direction of water flow in the pump. The cover plate 41 is also provided with a baffle 45, which is arranged at the front end of the exhaust valve 5. The baffle 45 is spaced apart from the circular arc guide plate 43 by a first predetermined distance, and is spaced apart from the centrifugal pump body 1 by a second predetermined distance. The baffle 45 and the circular arc guide plate 43 form a first water passage. After passing through the first water passage, the liquid enters the water hole 44 of the cover plate 41 through the opening between the circular arc guide plate 43 and the guide transition plate 42, and then enters the high pressure area, and flows out through the water outlet 3.

[0061] In this embodiment, the baffle 45 is arranged on the guide plate assembly 4 and located at the front end of the exhaust valve 5. When the gas in the liquid passes through the baffle 45, the baffle 45 disperses the gas bubbles in the water flow and collects them. The water flow enters the high pressure area 30 of the centrifugal pump body 1 from the water hole 44, avoiding direct impact of the water on the exhaust valve 5, and avoiding vortex noise.

[0062] By arranging the guide transition plate 42 and the circular arc guide plate 43, the liquid in the water inlet 2 is guided. The liquid is guided by the guide transition plate 42 and the circular arc guide plate 43, so that the flow in the cavity between the centrifugal pump body 1 and the guide transition plate 42 and the circular arc guide plate 43 is stable. After the gas bubbles in the water flow are dispersed by the baffle 45, there will be no large gas bubbles directly impacting the exhaust valve 5, reducing noise. At the same time, because the gas bubbles are dispersed, there will be no large gas bubbles entering the high pressure area 30, which will not cause cavitation impact on the impeller in the high pressure area 30, improving the service life of the wall-hanging stove.

[0063] The medium in the system passes through the centrifugal pump, which provides power to the system while discharging the gas in the medium, reducing noise and cavitation, improving the efficiency of the stove, and prolonging the service life of the stove.

[0064] The baffle 45 is integrally arranged with the cover plate 41, and is spaced apart from the inner wall of the centrifugal pump body 1 by a second predetermined distance, avoiding interference between the baffle 45 and the inner wall of the centrifugal pump.

[0065] Preferably, to ensure that the baffle 45 guides the water flow and prevents the water from directly impacting the exhaust port of the exhaust valve 5, the first preset angle between the baffle 45 and the central axis of the exhaust valve 5 is 30°≤α1≤60°. Further preferably, the first preset angle between the baffle 45 and the central axis of the exhaust valve 5 is 30°, so as to smoothly guide the liquid between the baffle assembly 4 and the centrifugal pump body 1 and not to cause excessive resistance to the water flow. In other embodiments, the first preset angle between the baffle 45 and the central axis of the exhaust valve 5 can alternatively be 45° or 60°. When the first preset angle is greater than 60°, the projection area of the baffle 45 on the exhaust valve 5 is small, and thus the ability to disperse the gas bubbles in the water flow is reduced, resulting in a large impact force of the gas on the exhaust valve 5 and a large noise.

[0066] Preferably, the bottom end of the baffle 45 is arranged on the port ring cover plate 41, and a reinforcing rib 46 is arranged between the baffle 45 and the port ring cover plate 41 to increase the connection strength between the baffle 45 and the port ring cover plate 41.

[0067] Preferably, the central axis of the exhaust valve 5 is perpendicular to the central axis of the water inlet 2, and the included angle between the central axis of the exhaust valve 5 and the central axis of the water outlet 3 is Q=0°-60°. By adjusting the angle between the exhaust valve 5 and the water inlet 2 and the water outlet 3, the gas in the medium can be smoothly collected into the exhaust device and discharged. For example, Q=0°, 30° or 60°. By adjusting the position of the exhaust valve 5, the medium in the system is subjected to the action of the centrifugal pump, the gas in the medium is discharged while the system is powered, the noise and cavitation are reduced, the efficiency of the furnace is improved, and the service life of the furnace is prolonged. The exhaust valve 5 arranged at the above position has good exhaust effect, and the gas can be well discharged.

[0068] Preferably, the exhaust valve 5 is arranged above the water inlet 2, and the central axis of the exhaust valve 5 is perpendicular to the central axis of the water inlet 2 and parallel to the central axis of the water outlet 3. The position of the exhaust valve 5 is arranged directly above the water outlet 3, and when the exhaust valve 5 is exhausted, liquid will be sprayed with the gas in the exhaust valve 5. By adjusting the position of the exhaust valve 5, the stability of the float in the exhaust valve 5 is ensured.

[0069] The percentage of gas can be obtained in software simulation to obtain the discharge amount of the gas.

[0070] In this embodiment, the exhaust valve 5 is arranged at the following position, and the water model is simulated. Figure 12 - Figure 16 The water simulation conditions shown are flow rate: 1.5 m³ / h, air mixing amount: 200 ml, and exhaust time: 10 min.

[0071] Figure 13The center axis of the exhaust valve 5 is perpendicular to the center axis of the water inlet 2, and the center axis of the exhaust valve 5 is parallel to the center axis of the water outlet 3. The influence of the diameter of the water inlet chamber on the exhaust effect of the exhaust valve 5 is shown below, and the simulation cloud diagram when the diameter of the water inlet chamber is the original size. Figure 14 The simulation cloud diagram when the diameter of the water inlet chamber in the technical scheme is reduced by 4mm, Figure 15 The simulation cloud diagram when the diameter of the water inlet chamber in the technical scheme is reduced by 10mm, Figure 16 The simulation cloud diagram when the diameter of the water inlet chamber in the technical scheme is reduced by 14mm, Figure 17 The simulation cloud diagram when the diameter of the water inlet chamber in the technical scheme is reduced by 20mm.

[0072] Table 1 is the simulation data corresponding to the technical scheme of the above Figures 13-17

[0073] Scheme description Remaining gas amount ml Exhaust amount ml Exhaust ratio % Original scheme 1 199 99.5 Inlet chamber radius reduction 4mm 2.4 197.6 98.8 Inlet chamber radius reduction 10mm 5.7 194.3 97.2 Inlet chamber radius reduction 14mm 6.8 193.2 96.6 Inlet chamber radius reduction 20mm 8.2 191.8 95.6

[0074] Specifically, according to the simulation data comparison, the simulation conclusion can be obtained from the content of Table 1: the exhaust capacity of the original design scheme is the best, and almost all the gas in the circulating pump can be exhausted. The exhaust capacity of the water inlet chamber radius reduction scheme is poor, and a certain proportion of gas remains in the circulating pump. With the decrease of the radius of the water inlet chamber, the exhaust capacity becomes weaker, and the exhaust capacity decreases more.

[0075] Figure 13 The center axis of the exhaust valve 5 is perpendicular to the center axis of the water inlet 2, and the center axis of the exhaust valve 5 is parallel to the center axis of the water outlet 3. The influence of the diameter of the water inlet chamber on the exhaust effect of the exhaust valve 5 is shown below, and the simulation cloud diagram when the diameter of the water inlet chamber is the original size. Figure 18 The center axis of the exhaust valve 5 is perpendicular to the center axis of the water inlet 2, and the center axis of the exhaust valve 5 is parallel to the center axis of the water outlet 3. The influence of the diameter of the water inlet chamber on the exhaust effect of the exhaust valve 5 is shown below, and the simulation cloud diagram when the diameter of the water inlet chamber is the original size. Figure 19 The center axis of the exhaust valve 5 is perpendicular to the center axis of the water inlet 2, and the center axis of the exhaust valve 5 is parallel to the center axis of the water outlet 3. The influence of the diameter of the water inlet chamber on the exhaust effect of the exhaust valve 5 is shown below, and the simulation cloud diagram when the diameter of the water inlet chamber is the original size. Figure 20 The center axis of the exhaust valve 5 is perpendicular to the center axis of the water inlet 2, and the center axis of the exhaust valve 5 is parallel to the center axis of the water outlet 3. The influence of the diameter of the water inlet chamber on the exhaust effect of the exhaust valve 5 is shown below, and the simulation cloud diagram when the diameter of the water inlet chamber is the original size. Figure 21 The center axis of the exhaust valve 5 is perpendicular to the center axis of the water inlet 2, and the center axis of the exhaust valve 5 is parallel to the center axis of the water outlet 3. The influence of the diameter of the water inlet chamber on the exhaust effect of the exhaust valve 5 is shown below, and the simulation cloud diagram when the diameter of the water inlet chamber is the original size.

[0076] The exhaust amount and exhaust proportion of each scheme are shown in Table 2 after the above simulation:

[0077] Table 2 is the simulation data corresponding to the technical scheme of the above Figure 13 , Figures 18-21

[0078] Scheme description Remaining gas amount ml Exhaust amount ml Exhaust ratio % Original scheme 1 199 99.5 Exhaust valve position adjustment 15° 3.2 196.8 98.4 Exhaust valve position adjustment 30° 5.8 194.2 97.1 Exhaust valve position adjustment 45° 9.6 190.4 95.2 Exhaust valve position adjustment 60° 14 186 93

[0079] ​​It is found through simulation that the position of the exhaust valve 5 has a great influence on the exhaust effect and the exhaust capacity. If the position of the exhaust valve 5 is unreasonable, the exhaust effect is poor, and the noise of the system in which the centrifugal pump is located is greatly increased. Therefore, the range of the included angle Q between the central axis of the exhaust valve 5 and the central axis of the water outlet 3 is 0-60°.

[0080] Specifically, the simulation conclusion that can be drawn from the simulation data comparison is as follows:

[0081] The exhaust capacity of the original design scheme is the best, and almost all the gas in the circulating pump can be exhausted.

[0082] The exhaust capacity of the position adjustment scheme of the exhaust valve 5 is the worst, and a large proportion of gas remains in the centrifugal pump.

[0083] Preferably, the side wall in the low-pressure area 20 on the exhaust valve 5 is provided with an exhaust hole 50, and the area S of the exhaust hole 50 ranges from 5*5 mm2 to 15*15 mm2. By limiting the size of the area of the exhaust hole 50, it is determined that the gas can overflow from the exhaust valve 5 smoothly. If the area of the exhaust hole 50 is less than 5*5 mm2, the gas is difficult to overflow quickly, and the gas will impact the valve core of the exhaust valve 5, generating noise. In addition, part of the gas is not exhausted in time, enters the high-pressure area, and causes cavitation erosion to the impeller. In addition, if the area of the exhaust hole 50 is less than 5*5 mm2, there is liquid in the exhaust valve 5, which is easy to appear water spouting. If the area of the exhaust hole 50 exceeds 15*15 mm2, the area of the exhaust hole 50 is too large, causing the liquid to spout out of the pump from the exhaust hole 50. The liquid in the pump will also impact the valve core of the exhaust valve 5, causing the valve core to be unstable and generating impact noise. Therefore, the area S of the exhaust hole 50 is set to range from 5*5 mm2 to 15*15 mm2 to ensure the best exhaust effect and no water spouting phenomenon. Preferably, the area S of the exhaust hole 50 is 5*5 mm2 or 15*15 mm2. For example, the exhaust hole 50 is a circular hole with a diameter ranging from 5 mm to 15 mm, or a square hole with a side length ranging from 5 mm to 15 mm, such as a square hole.

[0084] Preferably, the central axis of the exhaust valve 5 is perpendicular to the central axis of the water inlet 2 and parallel to the central axis of the water outlet 3, and the distance L between the bottom edge of the exhaust valve 5 and the highest point of the high-pressure area 30 of the water outlet 3 along the vertical direction ranges from 17 mm to 25 mm, so as to ensure that the exhaust effect of the exhaust valve 5 is better. Preferably, the distance L between the bottom edge of the exhaust valve 5 and the highest point of the high-pressure area 30 of the water outlet 3 along the vertical direction is 17 mm, 20 mm, or 25 mm.

[0085] Preferably, the central axis of the exhaust valve 5 is perpendicular to the central axis of the water inlet 2 and parallel to the central axis of the water outlet 3, and the axial distance N between the central axis of the exhaust valve 5 and the central axis of the water outlet 3 along the centrifugal pump body 1 ranges from 15mm to 50mm, so as to ensure good exhaust effect of the exhaust valve 5. Preferably, the axial distance N between the central axis of the exhaust valve 5 and the central axis of the water outlet 3 along the centrifugal pump body 1 can be any one of 15mm, 20mm, 30mm, 40mm and 50mm.

[0086] Preferably, the radial distance M between the central axis of the exhaust valve 5 and the central axis of the water outlet 3 along the centrifugal pump body 1 ranges from 10mm to 80mm. By setting the distance between the exhaust valve 5 and the water inlet 2 and the water outlet 3, the gas can be well collected and the exhaust effect is good. For example, the radial distance M between the central axis of the exhaust valve 5 and the central axis of the water outlet 3 along the centrifugal pump body 1 can be 10mm, 20mm, 30mm, 40mm, 50mm, 60mm, 70mm or 80mm.

[0087] Preferably, the exhaust valve 5 is provided with a backflow hole 51 at the bottom of the low-pressure area 20. The liquid entering the exhaust valve 5 will flow back to the low-pressure area 20 through the backflow hole 51, so that too much liquid will not accumulate in the exhaust valve 5, causing the valve core to float and be unstable.

[0088] The embodiment also provides a wall-hanging stove system including the centrifugal pump device. By optimizing the centrifugal pump device, the noise of the wall-hanging stove system during operation is reduced, the service life of the wall-hanging stove is prolonged, and the user experience of the wall-hanging stove system is improved.

[0089] Obviously, the above embodiments of the present application are merely exemplary and are not intended to limit the embodiments of the present application. Based on the above description, those skilled in the art can make other different forms of changes or modifications. Here, all the embodiments are not required to be exhausted. Any modification, equivalent replacement and improvement within the spirit and principle of the present application shall be included in the protection scope of the claims of the present application.

Claims

1. A centrifugal pump arrangement, characterized in that The centrifugal pump body (1) is provided with a low-pressure area (20) and a high-pressure area (30), the water inlet (2) and the exhaust valve (5) are located in the low-pressure area (20), and the water outlet (3) is located in the high-pressure area (30); The low-pressure area (20) of the centrifugal pump is provided with a guide vane assembly (4), the guide vane assembly (4) comprises a port ring cover plate (41), a guide transition plate (42) and a circular arc guide vane (43) arranged on one side of the port ring cover plate (41) towards the low-pressure area (20); One end of the circular arc guide vane (43) is connected with the guide transition plate (42), the guide transition plate (42) is arranged at the water inlet (2), and an opening is arranged between the other end of the circular arc guide vane (43) and the guide transition plate (42); The center of the port ring cover plate (41) is provided with a water passing hole (44), the liquid entering the water inlet (2) enters the low-pressure area (20) of the cavity between the guide vane assembly (4) and the centrifugal pump body (1), and then enters the high-pressure area (30) through the water passing hole (44); The port ring cover plate (41) is further provided with a partition plate (45), the partition plate (45) is arranged at the front end of the exhaust valve (5), the partition plate (45) is spaced apart from the circular arc guide vane (43) by a first preset distance L1, the partition plate (45) is spaced apart from the centrifugal pump body (1) by a second preset distance L2, and the partition plate (45) and the circular arc guide vane (43) form a first water passing channel; The first preset angle α1 between the partition plate (45) and the central axis of the exhaust valve (5) is 30°≤α1≤60°.

2. The centrifugal pump apparatus of claim 1, wherein, The partition plate (45) is integrally arranged with the port ring cover plate (41).

3. The centrifugal pump apparatus of claim 2, wherein, The bottom end of the partition plate (45) is arranged on the port ring cover plate (41), and a reinforcing rib (46) is arranged between the partition plate (45) and the port ring cover plate (41).

4. The centrifugal pump apparatus of claim 3, wherein, The central axis of the exhaust valve (5) is perpendicular to the central axis of the water inlet (2), and the included angle Q between the central axis of the exhaust valve (5) and the central axis of the water outlet (3) ranges from 0° to 60°.

5. The centrifugal pump apparatus of claim 4, wherein, The side wall of the exhaust valve (5) located in the low-pressure area (20) is provided with an exhaust hole (50), and the area S of the exhaust hole (50) ranges from 5*5mm² to 15*15mm².

6. The centrifugal pump apparatus of claim 5, wherein, The central axis of the exhaust valve (5) is parallel to the central axis of the water outlet (3), and the distance L between the bottom edge of the exhaust valve (5) and the highest point of the water outlet (3) in the high-pressure area (30) along the vertical direction ranges from 17mm to 25mm.

7. The centrifugal pump apparatus of claim 6, wherein, The distance N between the central axis of the exhaust valve (5) and the central axis of the water outlet (3) along the axial direction of the centrifugal pump body (1) ranges from 15mm to 50mm.

8. The centrifugal pump apparatus of claim 7, wherein, The radial distance M between the central axis of the exhaust valve (5) and the central axis of the water outlet (3) along the centrifugal pump body (1) ranges from 10 mm to 80 mm.

Images