Efficient circulating pump for heating

Abstract

The invention discloses an efficient circulating pump for heating, and relates to the technical field of circulating pumps, the efficient circulating pump for heating comprises a mounting plate, the upper surface of the mounting plate is fixedly connected with a supporting seat, the upper part of the supporting seat is fixedly connected with double volutes, and the top of the double volutes is fixedly connected with a supporting pipe through bolts; the upper portion of the supporting pipe is fixedly connected with a motor through a bolt, and an inner cavity of the double-volute is rotationally connected with an impeller. According to the efficient circulating pump for heating, through the unique double-volute design, compared with a common centrifugal pump, the efficiency of the pump is greatly improved, the motor power configured for the same operating parameters of the water pump is reduced by one specification compared with that of a common single-stage pump, energy consumption is greatly reduced, radial force on a single-volute pump shaft is unbalanced, and the service life of the pump is prolonged. Due to the adoption of the double-volute structure, the radial force is well balanced, and the pump can stably operate due to the fact that extra pressure is generated on a pump shaft, the operation of the pump is unstable, vibration and friction noise are generated, and energy is consumed.

Description

Technical Field

[0001] This invention relates to the field of circulating pump technology, and in particular to a high-efficiency circulating pump for heating. Background Technology

[0002] Sustainable energy supply is a long-term challenge facing the global community. With the increasing depletion of fossil fuels and intensifying pressures from climate change, countries are accelerating their energy structure transformation by improving existing processes, expanding the proportion of renewable energy applications, and building low-carbon, efficient energy systems. Against this backdrop, the green upgrading of heating systems has become a key area. Traditional coal-fired and gas-fired heating methods are not only high in carbon emissions but also limited by resource distribution. While renewable energy heating technologies such as solar energy, ground-source heat pumps, and industrial waste heat have cleanliness advantages, they face bottlenecks such as low heat transfer efficiency and poor system stability. As the "heart" of the heating system, the circulating pump for heating, by optimizing the efficiency of the heat transfer medium circulation, becomes a core device connecting renewable energy sources and end users, providing technical support for sustainable energy supply.

[0003] Traditional heating circulating pumps use ordinary centrifugal pumps, which result in low internal fluid transport efficiency. Furthermore, the single volute casing causes an imbalance in the radial force on the internal shaft, leading to unstable operation of the circulating pump. This not only generates vibration and friction noise but also wastes energy. Summary of the Invention

[0004] This invention provides a high-efficiency circulating pump for heating, in order to solve the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0006] A high-efficiency circulating pump for heating includes a mounting plate. A support base is fixedly connected to the upper surface of the mounting plate. A double volute is fixedly connected to the upper part of the support base. A support pipe is fixedly connected to the top of the double volute by bolts. A motor is fixedly connected to the upper part of the support pipe by bolts. An impeller is rotatably connected to the inner cavity of the double volute. The outer circumference of the impeller is rotatably connected to the inner cavity of the housing through a clearance fit, which can ensure the free rotation of the impeller and effectively reduce the backflow of the medium.

[0007] Preferably, the double volute includes a housing, which is fixedly connected to the upper part of the support base. The outer circumference of the impeller is rotatably connected to the inner cavity of the housing. An inlet is fixedly connected to the left side of the housing, and an outlet is fixedly connected to the right side of the housing.

[0008] Preferably, flange two is fixedly connected to the outer periphery of both the inlet and outlet, flange one is fixedly connected to the upper surface of the shell, and flange one is also fixedly connected to the lower surface of the support pipe.

[0009] Preferably, the output shaft of the motor is connected to the shaft of the impeller via a coupling.

[0010] Preferably, the impeller includes a hub, a bearing, and fan blades. The hub is mounted on a shaft inside the double volute via the bearing, and the fan blades are evenly distributed around the hub.

[0011] Preferably, the fan blades are divided into upper and lower groups, and the two groups of fan blades are inclined towards each other.

[0012] Preferably, the motor is fixedly connected to a mounting flange at its bottom, and a corresponding connecting flange is fixedly connected to the upper part of the support tube. The mounting flange of the motor and the connecting flange of the support tube are tightly connected by high-strength bolts.

[0013] Preferably, the inner cavity of the housing and the surface of the impeller are coated with a nano-coating by plasma spraying to obtain a smooth, fully covered and durable corrosion-resistant surface, while also reducing frictional resistance.

[0014] Preferably, the mounting plate has multiple mounting holes, which correspond to the positions of the anchor bolts on the concrete foundation.

[0015] Preferably, a maintenance box is fixedly connected to the front side of the motor. The maintenance box is designed with an IP65 protection rating. Its outer shell is injection molded from ABS engineering plastic, and the interior is equipped with relevant electrical components and terminal blocks.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. This invention provides a high-efficiency circulating pump for heating. Through a unique double volute design, the pump's efficiency is significantly improved compared to ordinary centrifugal pumps. It allows for a reduction in motor power compared to ordinary single-stage pumps while maintaining the same pump operating parameters, resulting in substantial energy savings. Furthermore, the radial force imbalance on the pump shaft of a single volute pump creates additional pressure on the shaft, causing unstable pump operation, vibration, friction noise, and energy loss. The double volute structure effectively balances the radial force, enabling the pump to operate smoothly.

[0018] 2. This invention provides a high-efficiency circulating pump for heating. Through a perfectly matched impeller and volute clearance, and due to the double-volute pump body structure, the impeller rotates more smoothly on the shaft, reducing various problems caused by rotational instability. Because of the smooth impeller rotation, the specified tolerance between the impeller and the pump volute can be minimized. Reduced tolerance means a more precise fit between the impeller and the pump volute, thereby significantly improving pump performance.

[0019] 3. This invention provides a high-efficiency circulating pump for heating. By applying a nano-coating to the surface of the impeller and the inner flow channel of the pump casing, a smooth, fully covered, and durable corrosion-resistant surface is obtained. The smooth surface can reduce the flow resistance of the fluid in the impeller and the inner flow channel of the pump casing, thereby improving the pump's delivery efficiency. The fully covered nano-coating can effectively isolate the fluid from direct contact with the surface of the impeller and the inner flow channel of the pump casing, preventing the fluid from corroding the impeller and the pump casing, and extending the service life of the pump. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0021] Figure 2 This is a schematic diagram of the rear three-dimensional structure of the present invention;

[0022] Figure 3 This is a schematic diagram of the motor structure of the present invention;

[0023] Figure 4 This is a schematic diagram of the double volute structure of the present invention;

[0024] Figure 5 This is a schematic diagram of the impeller structure of the present invention.

[0025] In the diagram: 1. Mounting plate; 2. Support base; 3. Double volute; 31. Shell; 32. Inlet; 33. Outlet; 34. Flange 1; 35. Flange 2; 4. Motor; 5. Inspection box; 6. Impeller; 61. Hub; 62. Bearing; 63. Fan blade; 7. Support pipe. Detailed Implementation

[0026] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0027] like Figures 1-5 As shown, a high-efficiency circulating pump for heating includes a mounting plate 1. A support base 2 is fixedly connected to the upper surface of the mounting plate 1 by high-strength bolts. The support base 2 is made of cast iron and undergoes aging treatment to eliminate internal stress. Its upper part is precisely aligned with a double volute 3 via a precision-machined locating pin. A support pipe 7 is fixedly connected to the top of the double volute 3 by double-headed bolts. The support pipe 7 has a hollow structure to reduce weight and material costs. A motor 4 is fixedly connected to its upper part by anti-loosening bolts. The motor 4's housing is designed with an IP55 protection rating to adapt to the humid environment of the heating system. An impeller 6 is rotatably connected to the inner cavity of the double volute 3 via precision bearings. The bearings are made of wear-resistant ceramic material to extend their service life.

[0028] It should be noted that the mounting plate 1, as the basic support component of the entire circulating pump, provides a stable and robust mounting platform for all other components. The support base 2 primarily supports the double volute 3, raising it to a suitable height and ensuring its absolute horizontal stability. The double volute 3 is one of the core components of the circulating pump. It constructs a specific flow channel for the medium, and its unique double-layer structure effectively balances the complex radial forces generated when the impeller 6 rotates, significantly reducing pump vibration and noise, improving pump efficiency, and extending pump lifespan.

[0029] like Figure 4 As shown, the double volute 3 includes a housing 31, which is fixedly connected to the upper part of the support base 2. The outer periphery of the impeller 6 is rotatably connected to the inner cavity of the housing 31. The left side of the housing 31 is fixedly connected to the water inlet 32, and the right side of the housing 31 is fixedly connected to the water outlet 33. The outer periphery of the impeller 6 is rotatably connected to the inner cavity of the housing 31 through clearance fit, which can ensure the free rotation of the impeller and effectively reduce the backflow of the medium.

[0030] It should be noted that the double volute 3 is one of the core components of the circulating pump. Its housing 31 provides installation space for the impeller 6 and forms a flow channel for the medium. The inner cavity of the housing 31 and the impeller 6 are clearance-fitted, which can reduce medium backflow. The inlet 32 ​​and outlet 33 are respectively located on the left and right sides of the housing 31 for the inflow and outflow of the medium. The special design of the inner cavity of the housing 31 can effectively guide the flow of the medium, reduce energy loss, and improve the efficiency of the circulating pump.

[0031] like Figure 4 As shown, flange 2 35 is welded to the outer periphery of both the inlet 32 ​​and the outlet 33. Flange 2 35 is made of 304 stainless steel to prevent rust, and its sealing surface adopts a raised face structure and is equipped with a metal spiral wound gasket to ensure reliable sealing. Flange 1 34 is welded to the upper surface of the shell 31, and the lower surface of the support pipe 7 is also machined to form a corresponding flange 1 34. The two are connected by eight high-strength bolts.

[0032] It should be noted that flange 2.35 facilitates the connection between the circulating pump and the external water pipe, while flange 1.34 facilitates the connection between the double volute 3 and the support pipe 7, allowing direct connection with steel pipes in the heating system, ensuring a tight and reliable connection. All flange connection surfaces undergo surface treatment to improve corrosion resistance, and critical areas are coated with an epoxy resin coating for secondary protection. High-strength bolts are used to connect flange 1.34, ensuring connection strength while preventing flange deformation or damage due to excessive preload, ensuring that the connection will not loosen or leak during the operation of the circulating pump.

[0033] like Figure 3As shown, the output shaft of motor 4 is connected to the shaft of impeller 6 via a coupling.

[0034] It should be noted that motor 4 is the power source of the circulating pump, and its output shaft is connected to the shaft of impeller 6 via a coupling. The function of motor 4 is to efficiently convert electrical energy into mechanical energy, and drive impeller 6 to rotate at high speed within the double volute 3 through the rotation of the output shaft.

[0035] like Figure 5 As shown, the impeller 6 includes a hub 61, a bearing 62, and fan blades 63. The hub 61 is mounted on a shaft inside the double volute 3 via the bearing 62, and the fan blades 63 are evenly distributed around the hub 61.

[0036] It should be noted that the impeller 6, rotatably connected within the inner cavity of the double volute 3, is a key component for the circulating pump to achieve efficient media transport. The gap between the hub 61 and the housing 31 is perfectly matched. The impeller 6 consists of upper and lower hubs 61, bearings 62, and blades 63. Each hub 61 is mounted on a shaft inside the double volute 3 via bearings 62, and the blades 63 are evenly distributed around the hubs 61. When the motor 4 drives the shaft to rotate, the impeller 6 rotates at high speed, and the upper and lower blades 63 simultaneously perform work on the media, allowing the media to gain more energy, thereby more effectively realizing the flow of the media from the inlet 32 ​​to the outlet 33.

[0037] like Figure 5 As shown, the fan blades 63 are divided into two groups, upper and lower, with both groups inclined towards each other. Each group of fan blades consists of 6 main blades, which are designed using the three-dimensional flow theory, and their profiles have been optimized multiple times to adapt to the characteristics of the heating medium.

[0038] It should be noted that the double-layer fan blades 63 can optimize the flow path of the medium and improve the hydraulic efficiency of the impeller. The opposing inclined design allows the medium to form a spiral flow within the impeller, enhancing its work capacity while reducing turbulence and vortices at the impeller outlet. This makes the flow of the medium within the double volute 3 smoother, reducing energy loss and improving the overall performance of the circulating pump. The splitting blades improve the flow field distribution inside the impeller, preventing medium separation on the back of the blades and further improving the pump's cavitation resistance.

[0039] like Figure 2 and Figure 3 As shown, a mounting flange is fixedly connected to the bottom of the motor 4, and a corresponding connecting flange is fixedly connected to the upper part of the support pipe 7. The mounting flange of the motor 4 and the connecting flange of the support pipe 7 are tightly connected by high-strength bolts.

[0040] It should be noted that the motor 4 is connected to the support pipe 7 via a flange, ensuring a secure and reliable connection between the motor 4 and the support pipe 7. This connection can withstand various forces generated by the motor 4 during operation, such as vibration and torque. The high-strength bolt connection facilitates installation and disassembly, and the double-nut anti-loosening structure makes maintenance and replacement of the motor 4 convenient. The support pipe 7 has a cable routing channel inside, protecting the motor power cord from mechanical damage.

[0041] like Figure 4 As shown, the inner cavity of the housing 31 and the surface of the impeller 6 are coated with a nano-coating by plasma spraying. The main components of the nano-coating are a composite material of nano-titanium dioxide and nano-alumina, in order to obtain a smooth, fully covered and durable corrosion-resistant surface, while also reducing frictional resistance.

[0042] It should be noted that a smooth surface reduces frictional resistance during media flow, minimizes energy loss, and improves pump efficiency. A fully covered coating effectively prevents corrosion of the casing 31 and impeller 6, extending component lifespan. Its durable and corrosion-resistant properties ensure stable performance of the circulating pump during long-term operation. The nano-coating also has a self-cleaning function, preventing impurities from adhering to the impeller surface and maintaining efficient pump operation.

[0043] like Figure 1 As shown, mounting plate 1 has mounting holes that correspond to the positions of the anchor bolts on the concrete foundation. The mounting holes are countersunk to prevent the bolt heads from protruding and affecting the stability of the pump.

[0044] It should be noted that the mounting holes facilitate the installation of the circulating pump. Through these mounting holes, bolts and other connectors can be used to firmly fix the circulating pump to the installation base of the heating system, ensuring that the circulating pump will not move during operation, guaranteeing a stable connection between the pump and the heating system, and thus ensuring the normal operation of the entire heating system.

[0045] like Figure 1 As shown, the front side of the motor 4 is fixedly connected to the maintenance box 5 by bolts. The maintenance box 5 adopts the IP65 protection level design. Its shell is injection molded from ABS engineering plastic, and the interior is equipped with relevant electrical components and terminal blocks.

[0046] It should be noted that the purpose of the maintenance box 5 is to facilitate the inspection and maintenance of the electrical system of motor 4. The maintenance box 5 contains monitoring components such as voltmeters, ammeters, and indicator lights, as well as related electrical components and wiring terminals. It can display motor operating parameters in real time. When motor 4 malfunctions, maintenance personnel can use the maintenance box 5 to inspect, test, and repair the electrical system, quickly troubleshoot the problem, and restore the circulating pump to normal operation. The maintenance box door features a quick-opening design and is equipped with a safety lock to prevent unauthorized personnel from operating it.

[0047] The working principle of this invention is as follows: After the motor 4 starts, its output shaft drives the impeller 6 to rotate via a coupling. The medium enters the inner cavity of the double volute 3 from the inlet 32, and flows out from the outlet 33 under the action of the impeller 6 blades, entering the heating system for circulation. The special structure of the double volute 3 enables the medium to form a stable spiral flow in the flow channel, reducing energy loss; the nano-coating reduces frictional resistance; and the impeller 6 improves work efficiency, thereby achieving efficient circulation of heating water.

[0048] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A high-efficiency circulating pump for heating, comprising a mounting plate (1), characterized in that: A support base (2) is fixedly connected to the upper surface of the mounting plate (1). A double volute (3) is fixedly connected to the upper part of the support base (2). A support tube (7) is fixedly connected to the top of the double volute (3) by bolts. A motor (4) is fixedly connected to the upper part of the support tube (7) by bolts. An impeller (6) is rotatably connected to the inner cavity of the double volute (3).

2. The high-efficiency circulating pump for heating according to claim 1, characterized in that: The double volute (3) includes a housing (31), which is fixedly connected to the upper part of the support base (2). The outer circumference of the impeller (6) is rotatably connected to the inner cavity of the housing (31). An inlet (32) is fixedly connected to the left side of the housing (31), and an outlet (33) is fixedly connected to the right side of the housing (31).

3. The high-efficiency circulating pump for heating according to claim 2, characterized in that: Flange 2 (35) is fixedly connected to the outer periphery of the inlet (32) and outlet (33), flange 1 (34) is fixedly connected to the upper surface of the shell (31), and flange 1 (34) is also fixedly connected to the lower surface of the support pipe (7).

4. The high-efficiency circulating pump for heating according to claim 1, characterized in that: The output shaft of the motor (4) is connected to the shaft of the impeller (6) via a coupling.

5. A high-efficiency circulating pump for heating according to claim 1, characterized in that: The impeller (6) includes a hub (61), a bearing (62) and a fan blade (63). The hub (61) is mounted on a shaft inside the double volute (3) via the bearing (62), and the fan blade (63) is evenly distributed around the hub (61).

6. A high-efficiency circulating pump for heating according to claim 5, characterized in that: The fan blades (63) are divided into two groups, upper and lower. The two groups of fan blades (63) are inclined towards each other. Each group of fan blades (63) consists of 6 blades. The blades are designed using the three-dimensional flow theory, and their profiles have been optimized multiple times to adapt to the characteristics of the heating medium.

7. A high-efficiency circulating pump for heating according to claim 5, characterized in that: The motor (4) is fixedly connected to a mounting flange at the bottom, and the support pipe (7) is fixedly connected to a corresponding connecting flange at the top. The mounting flange of the motor (4) and the connecting flange of the support pipe (7) are tightly connected by high-strength bolts.

8. A high-efficiency circulating pump for heating according to claim 2, characterized in that: The inner cavity of the housing (31) and the surface of the impeller (6) are coated with a nano-coating by plasma spraying process to obtain a smooth, fully covered and durable corrosion-resistant surface, while also reducing frictional resistance.

9. A high-efficiency circulating pump for heating according to claim 1, characterized in that: The mounting plate (1) has multiple mounting holes, which correspond to the positions of the anchor bolts on the concrete foundation.

10. A high-efficiency circulating pump for heating according to claim 1, characterized in that: The front side of the motor (4) is fixedly connected to a maintenance box (5). The maintenance box (5) is designed with an IP65 protection level. Its shell is injection molded from ABS engineering plastic, and it contains relevant electrical components and terminal blocks.

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