Boiler water circulating centrifugal pump for energy-saving boiler

Abstract

The invention relates to the technical field of centrifugal pump equipment, and provides a boiler water circulation centrifugal pump for an energy-saving boiler, which comprises a centrifugal pump, a pump shell and a side shell, the inner ring frame is located in the pump shell and is in butt joint with the water inlet, and impurities in water are filtered through a front filter plate and used for intercepting the impurities in the water; the arc-shaped plate is located in front of the filter plate, the opposite faces of the arc-shaped plate are attached to each other, when the filter plate rotates through an arc-shaped structure of the arc-shaped plate, impurities in meshes are scraped out to form a dredging effect, and meanwhile the arc-shaped plate is further used for guiding the impurities to the outer ring area; and the outer ring frame is located on the outer side of the inner ring frame and used for storing the intercepted impurities, and space communication is formed through a first separation net, close to the water inlet, on the inner side, so that the impurities enter the outer ring frame after being guided. During operation of the centrifugal pump, impurities in water are filtered in real time, automatic dredging treatment is formed, in addition, the blades can be cleaned in real time, the impurities cannot be adsorbed to form dirt and corrosion, and therefore the operation safety and the service life of the impeller and the boiler are guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of centrifugal pump equipment, and more specifically, to a boiler water circulation centrifugal pump for an energy-saving boiler. Background Art

[0002] Energy-saving boiler overview refers to a boiler that uses the waste heat in waste gas, waste materials or waste liquid in various industrial processes and the heat generated by the combustion of combustible materials to heat water to a certain working temperature;

[0003] The boiler water circulation centrifugal pump is a key equipment in the boiler evaporation system. The centrifugal force is generated by the rotation of the impeller in the centrifugal pump, which sucks water into the pump body and accelerates it to the outlet, and then transports it to the boiler through the pipeline to complete the circulation process.

[0004] However, when the centrifugal pump is pumping water, the salt concentration of the circulating water increases continuously due to evaporation during the cooling process, exceeding the solubility and precipitating to form scale such as calcium carbonate, calcium phosphate, and magnesium silicate; secondly, organic matter, microbial colonies, silt, dust, etc. in the water constitute dirt, which affects heat transfer and water flow and causes under-scale corrosion; the mixing of these impurities will not only have an adverse effect on the safe operation and life of the boiler, but will also continuously wear and corrode the impeller of the centrifugal pump, causing the centrifugal pump to malfunction or even fail.

[0005] In order to solve the above problems, the present application proposes a boiler water circulation centrifugal pump for an energy-saving boiler. Summary of the invention

[0006] The object of the present invention is to provide a boiler water circulation centrifugal pump for an energy-saving boiler, which improves the operation safety and service life of the centrifugal pump and the boiler by a post-filtration self-cleaning method.

[0007] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0008] A boiler water circulation centrifugal pump for an energy-saving boiler, comprising:

[0009] Centrifugal pumps and pump casings and side casings;

[0010] The inner ring frame is located inside the pump housing and docked with the water inlet. It filters impurities in the water through the filter plate in front and is used to intercept impurities in the water.

[0011] The arc plate is located in front of the filter plate, with the opposite surfaces fitting each other. When the filter plate rotates, the arc structure of the arc plate scrapes out the impurities in the mesh to form a dredging effect, and is also used to guide the impurities to the outer circle area;

[0012] The outer ring frame is located outside the inner ring frame and is used to store intercepted impurities. The first partition net on the inner side adjacent to the water inlet forms a spatial connection so that the impurities are guided into the outer ring frame.

[0013] A double-layer ring frame is sleeved on both sides of the blades of the impeller. A brush roller is arranged inside the double-layer ring frame. Every two brush rollers form a group of blades. The number of groups is the same as the number of blades. The double-layer ring frame is used to clean the impeller so that impurities cannot scale and corrode the blades.

[0014] The electric telescopic device has a movable end connected to the limit ring, which is used to drive the double-layer ring frame to move back and forth repeatedly. A T-shaped ring frame is provided on the outside of the limit ring and is rotatably connected to the limit ring, and a connecting rod is provided in front of the inner layer and is connected to the inner ring frame, so that the brush roller and the filter plate can rotate with the blade to form a real-time cleaning effect.

[0015] Beneficial effects of the present invention:

[0016] The present invention automatically filters water after passing through the filter plate and the curved plate, and after impurities are intercepted, the impurities can be pushed out through the first isolation net and stored in the outer ring frame by utilizing the rotational movement of the inner ring frame combined with the curved structure of the curved plate. Compared with the existing centrifugal pump, the present invention can automatically form a pre-filtration process when pumping water to prevent a large amount of impurities from mixing in and causing accumulation and dirt, prevent wear and corrosion of the impeller, and also ensure the safe operation and service life of the boiler.

[0017] In addition, by setting the brush roller to clamp the blades, the filter plate can be driven to rotate through the connecting rod during its rotation operation, so that the interception and cleaning of impurities can maintain high efficiency to prevent blockage from affecting the water flow;

[0018] The present invention provides a limit ring and can utilize an electric telescopic device to drive the brush roller to move back and forth repeatedly during the rotation of the double-layer ring frame, thereby achieving the effect of cleaning the blades and separating the particle impurities, ensuring that no tiny particle impurities are adsorbed on the surface of the blades to prevent scaling and corrosion, and effectively maintaining the operating efficiency of the centrifugal pump. After cleaning, the balance of the impeller is restored, the vibration of the pump group is reduced, the stability is improved, and the service life is increased. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 It is a schematic diagram of the overall combined structure of the present invention;

[0021] Figure 2 It is a schematic diagram of the overall appearance structure of the present invention;

[0022] Figure 3It is a schematic diagram of the structure of the pump casing and the side casing in the exploded state of the present invention;

[0023] Figure 4 It is a schematic diagram of the planar structure of the pump casing and the side casing in the internal combination state of the present invention;

[0024] Figure 5 It is a schematic diagram of the interior of the side shell and its partial enlarged structure of the present invention;

[0025] Figure 6 It is a schematic diagram of the internal structure of the double-layer ring frame and the impeller in the disassembled state of the present invention;

[0026] Figure 7 It is a schematic diagram of the double-layer ring frame and the impeller in the disassembled state and the partial enlarged structure thereof;

[0027] Figure 8 It is a partial enlarged structural schematic diagram of part A of the present invention; DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] like Figure 1-Figure 8 As shown, the present invention provides an embodiment of a boiler water circulation centrifugal pump for an energy-saving boiler:

[0030] See also Figure 1 , Figure 4 , Figure 5 and Figure 7 , a boiler water circulation centrifugal pump for an energy-saving boiler, comprising:

[0031] Centrifugal pump 1, pump casing 2 and side casing 3;

[0032] The inner ring frame 4 inside the pump housing 2 is connected to the water inlet, and the water inlet is blocked by the filter plate 41 in front of the inner ring frame 4 so that the incoming water is directly pre-treated to filter impurities in the water and intercept them between the water inlet and the filter plate 41;

[0033] The arc plate 33 in front of the filter plate 41 is installed and fixed by the connecting pillar 34 at the tail end of the water inlet, so that the arc plate 33 fits the filter plate 41, and is used to scrape out impurities in the mesh through the arc structure and guide them to the outer circle area when the filter plate 41 rotates. With the subsequent entry of water flow, the impurities are pushed into the interior of the outer ring frame 5; the outer ring frame 5 is located inside the annular cavity 32 on the inner side of the pump casing 2, and is used to store intercepted impurities. A first partition net 51 is provided on the inner side of the outer ring frame 5 so that the internal space is connected to the water inlet and the front of the filter plate 41.

[0034] The electric expander 7 inside the upper end of the annular cavity 32 has a movable end connected to the limit ring 61 for driving the double-layer ring frame 6 to move back and forth repeatedly. A T-shaped ring frame 63 is provided outside the limit ring 61 and is rotatably connected to the limit ring 61.

[0035] The double-layer ring frame 6 inside the pump housing 2 is sleeved on the inner and outer sides of the blades of the impeller 21. The impeller 21 is cleaned by the brush roller 62 arranged inside so that impurities cannot scale and corrode the blades. Every two brush rollers 62 form a group of blades, and the number of groups is the same as the number of blades.

[0036] A connecting rod 42 is provided in front of the inner layer of the double-layer ring frame 6 and connected to the inner ring frame 4. Under the action of the electric expander 7 and the T-shaped ring frame 63, the brush roller 62 rotates synchronously with the blades and forms a forward and backward slide to achieve the effect of real-time cleaning of the blades. In addition, a support rod 64 is fixedly installed inside the double-layer ring frame 6, and the brush roller 62 is installed through the outer sleeve 65, so that the soft brush roller 62 forms a rotating operation while moving forward and backward, achieving the effect of brushing the blades, making the cleaning of the blades more complete and effectively preventing impurities from remaining; at the same time, the filter plate 41 is also driven to rotate and interact with the arc plate 33 to form impurity cleaning.

[0037] In the specific implementation, the pumped water first enters the inner ring frame 4, and the impurities in the water are intercepted by the filter plate 41 in front of it. At the same time, the electric expander 7 drives the brush roller 62 to move forward and backward through the limit ring 61, so that it forms a brushing effect on the blades to prevent the adsorption of impurities, scaling and corrosion. The rotational force of the blades, combined with the clamping effect of a group of brush rollers 62, can drive the double-layer ring frame 6 to rotate, and transmit power to the inner ring frame 4 through the connecting rod 42, thereby achieving the effect of driving the filter plate 41 to rotate. At this time, the filter plate 41 is dredged under the scraping action of the arc plate 33, and at the same time, the arc structure is used to guide the impurities to the outer ring area, so that the impurities pass through the first partition net 51 and enter the outer ring frame 5, and are adsorbed and stored by the adsorption particles inside it. After completing the cleaning operation, the effect of multiple protection is achieved, ensuring the operating safety and service life of the impeller 21 and the boiler. In addition, the side shell 3 and the pump shell 2 are connected and fixed by a flange connection method, which can realize the convenient assembly and disassembly of the outer ring frame 5, which is used to clean internal impurities and replace adsorption particles to maintain the cleaning effect during long-term operation of the equipment.

[0038] See also Figure 4 and Figure 5 The inner support 31 is an inner and outer double-layer structure, the inner layer is a right-angled ring structure, and a fault is formed between the inner and outer double-layer structures. A sleeve ring 43 is provided on the outer side of the inner ring frame 4, and an annular space is formed between the two. The sleeve ring 43 is sleeved on the outer side of the inner layer structure of the inner support 31. The outer ring frame 5 is fixedly connected to the outer side of the sleeve ring 43. At this time, the outer ring frame 5 rotates with the inner ring frame 4, so that the internal adsorption particles are displaced to promote the impurity adsorption efficiency, and at the same time ensure that the adsorption of adsorption particles in different areas is uniform, thereby improving the performance; in addition, the sleeve ring 43 is rotatably installed with a ball 44 through the inner positioning groove 45, which is used to reduce the friction resistance when the outer ring frame 5 and the inner ring frame 4 rotate, so as to maintain the rotation efficiency of the impeller 21.

[0039] See also Figure 4 and Figure 5 A second partition net 52 is provided at the rear of the outer ring frame 5 adjacent to the inner ring area, which not only firmly connects the inner and outer double-layer structures, but also is used to overflow water into the pump casing 2 for water delivery operations; in addition, by closing the second partition net 52 and the first partition net 51 and filling them with adsorption particles, it is also used to ensure the cleanliness of water overflowing from the second partition net 52 to the pump casing 2, while preventing impurities contained in the overflowing water from clogging the second partition net 52.

[0040] The second partition net 52 is provided with convex plates 53 on both the inner and outer sides, which are connected to the inner and outer double-layer structure of the inner bracket 31. The inner part of the fault is provided with a grid 35 for secondary filtration of overflow water and for firmly connecting the inner and outer double-layer structure.

[0041] See also Figure 4 and Figure 8 A hole is provided inside the upper end of the inner bracket 31 for passing the electric telescopic device 7 so that when the movable section area moves forward and backward 1, a seal is formed by the sealing gasket 71 arranged inside the hole to prevent water from penetrating into the annular cavity 32.

[0042] It can be understood that the present invention can filter impurities in water in real time and form automatic dredging during the operation of the centrifugal pump. In addition, it can clean the blades in real time so that impurities cannot be adsorbed to form dirt and corrosion, thereby ensuring the operating safety and service life of the impeller and boiler.

[0043] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0044] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A boiler water circulation centrifugal pump for an energy-saving boiler, characterized in that: include: Centrifugal pumps and pump casings and side casings; The inner ring frame is located inside the pump housing and docked with the water inlet. It filters impurities in the water through the filter plate in front and is used to intercept impurities in the water. The arc plate is located in front of the filter plate, with the opposite surfaces fitting each other. When the filter plate rotates, the arc structure of the arc plate scrapes out the impurities in the mesh to form a dredging effect, and is also used to guide the impurities to the outer circle area; The outer ring frame is located outside the inner ring frame and is used to store intercepted impurities. The first partition net on the inner side adjacent to the water inlet forms a spatial connection so that the impurities are guided into the outer ring frame. A double-layer ring frame is sleeved on both sides of the blades of the impeller. A brush roller is arranged inside the double-layer ring frame. Every two brush rollers form a group of blades. The number of groups is the same as the number of blades. The double-layer ring frame is used to clean the impeller so that impurities cannot scale and corrode the blades. The electric telescopic device has a movable end connected to the limit ring, which is used to drive the double-layer ring frame to move back and forth repeatedly. A T-shaped ring frame is provided on the outside of the limit ring and is rotatably connected to the limit ring, and a connecting rod is provided in front of the inner layer and is connected to the inner ring frame, so that the brush roller and the filter plate can rotate with the blade to form a real-time cleaning effect.

2. The boiler water circulation centrifugal pump for an energy-saving boiler according to claim 1, characterized in that: The side shell forms an annular cavity through the inner bracket inside, which is used to install the outer ring frame and the electric telescopic device. The inner bracket is an inner and outer double-layer structure, and the inner layer is a right-angle ring structure.

3. The boiler water circulation centrifugal pump for an energy-saving boiler according to claim 1, characterized in that: The inner ring frame is sleeved on the outer side of the inner layer structure of the inner bracket through an outer sleeve ring, and is connected to the outer ring frame to drive the outer ring frame to rotate synchronously.

4. The boiler water circulation centrifugal pump for an energy-saving boiler according to claim 1, characterized in that: A second partition net is provided at the rear of the outer ring frame adjacent to the inner ring area, which not only firmly connects the inner and outer double-layer structures, but is also used to overflow water into the pump casing for water delivery operations.

5. The boiler water circulation centrifugal pump for an energy-saving boiler according to claim 1, characterized in that: A support rod is fixedly installed inside the double-layer ring frame, and a brush roller is installed through an outer shaft sleeve, so that the brush roller forms a rotating operation while moving back and forth, thereby achieving the effect of brushing the blades.

6. The boiler water circulation centrifugal pump for an energy-saving boiler according to claim 2, characterized in that: A hole is provided inside the upper end of the inner bracket for installing the movable section of the electric expander adjacent to the fixed end, and a sealing gasket is provided inside the hole to connect to the outside of the electric expander to prevent water from penetrating into the annular cavity when the electric expander expands and contracts forwards and backwards.

7. The boiler water circulation centrifugal pump for an energy-saving boiler according to claim 1, characterized in that: The interior of the outer ring frame is used to fill adsorption particles, which form adsorption after the intercepted impurities enter, thereby ensuring the cleanliness of water overflowing into the pump casing and preventing the overflowing water from containing impurities and clogging the second partition net.

8. The boiler water circulation centrifugal pump for an energy-saving boiler according to claim 4, characterized in that: The second partition net is provided with convex plates on both the inner and outer sides, which are connected to the inner and outer two-layer structure of the inner support.

9. The boiler water circulation centrifugal pump for an energy-saving boiler according to claim 2, characterized in that: A grid is provided inside the fault of the inner support, which is used for secondary filtering of overflow water and for firmly connecting the inner and outer double-layer structures.

10. The boiler water circulation centrifugal pump for an energy-saving boiler according to claim 1, characterized in that: The side shell and the pump shell are connected and fixed by flange connection, so that the outer ring frame can be easily disassembled and assembled, and is used to clean impurities and maintain the cleaning effect during long-term operation.

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