A small to medium-sized axial flow pump that is easy to maintain and replace

Abstract

This utility model relates to the field of structural and bearing sealing technology for small and medium-sized axial flow pumps, and particularly to a small and medium-sized axial flow pump that is easy to maintain and replace. It includes a water tank, a variable frequency motor mounted on the top of the water tank, a second sealing layer fixedly connected between the bottom of the water tank and the variable frequency motor, a low-pressure inlet pipe fixedly connected to the bottom of the water tank, a first sealing layer fixedly connected between the low-pressure inlet pipe and the bottom of the water tank, and an outlet pipe fixedly connected inside the water tank. By changing the pump's discharge structure and adopting a water tank supply and discharge method, the entire pump can be lifted out directly for maintenance and replacement of vulnerable parts, making assembly and disassembly very convenient and quick. It can also be used as a mobile drainage device. The structure of the lower bearing is changed from a sliding bearing to a rolling bearing, and a combined skeleton oil seal is used for sealing, making the product more widely applicable. The mounting surface is sealed with a rubber gasket, making it better suited for longer-distance transportation.

Description

Technical Field

[0001] This utility model relates to the field of structure and bearing sealing technology of small and medium-sized axial flow pumps, specifically a small and medium-sized axial flow pump that is easy to maintain and replace. Background Technology

[0002] 1. Traditional axial flow pumps use a T-shaped pipe to connect to the external pipeline at the outlet, which means that the outlet pipe must be removed every time a vulnerable part is replaced, which is extremely inconvenient.

[0003] 2. Traditional axial flow pumps use a conveying fluid or external water to lubricate the lower guide bearing, which is either structurally complex or unsuitable for on-site conditions. A rolling bearing with a multi-skeletal seal is used, and the bearing employs a grease-lubricated structure. Therefore, we propose a small to medium-sized axial flow pump that is easy to maintain and replace. Utility Model Content

[0004] The purpose of this utility model is to provide a small to medium-sized axial flow pump that is easy to maintain and replace, so as to solve the problems of inconvenient and complicated installation and maintenance and short bearing service life of traditional axial flow pumps mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A small to medium-sized axial flow pump that is easy to maintain and replace includes a water tank. A variable frequency motor is installed on the top of the water tank. A second sealing layer is fixedly connected between the bottom of the water tank and the variable frequency motor. A low-pressure zone inlet pipe is fixedly connected to the bottom of the water tank. A first sealing layer is fixedly connected between the low-pressure zone inlet pipe and the bottom of the water tank. An outlet pipe is fixedly connected inside the water tank. The two ends of the outlet pipe are respectively located between the first sealing layer and the second sealing layer. A high-pressure zone outlet pool is fixedly connected inside the water tank. Drain pipes are fixedly connected inside the water tank and are located on the side of the high-pressure zone outlet pool.

[0007] As a preferred embodiment of this utility model, a water tank is fixedly connected to the side of the drain pipe, and a slurry dilution tank is fixedly connected to the side of the water tank. The slurry dilution tank is rectangular in shape.

[0008] As a preferred embodiment of this utility model, the water tank is inclined between the water tank and the slurry dilution pool, and the water tank is cylindrical in shape.

[0009] As a preferred embodiment of this utility model, a protective pipe is fixedly connected inside the water outlet pipe, and a combined skeleton sealing structure is fixedly connected to the bottom of the protective pipe.

[0010] As a preferred embodiment of this utility model, two drain pipes are provided, the two drain pipes are positioned opposite each other, and both drain pipes are located on the side of the water outlet pipe.

[0011] As a preferred embodiment of this utility model, the variable frequency motor is located at the top center of the water tank, and the water tank is made of stainless steel.

[0012] As a preferred embodiment of this utility model, the water outlet pipe is provided in two sets, and the two sets of water outlet pipes are positioned opposite each other.

[0013] As a preferred embodiment of this utility model, the combined skeleton sealing structure extends into the water inlet pipe in the low-pressure area, and the combined skeleton sealing structure is located directly below the protective pipe.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. In this utility model, by changing the pump's discharge structure and adopting a water tank for water supply, the entire pump can be lifted out directly for maintenance and replacement of vulnerable parts, making assembly and disassembly very convenient and quick. It can also be used as a mobile drainage device. The structure of the lower bearing has been changed from a sliding bearing to a rolling bearing, and a combined skeleton oil seal has been adopted for sealing, making the product more widely applicable. The mounting surface is sealed with a rubber gasket, making it better suited for longer-distance transportation.

[0016] 2. In this utility model, the pump is lifted out as a whole, making installation and maintenance convenient. The pump outlet is open and there is a pressure-stabilizing water tank. The external sealing surface adopts an adjustable sealing gasket for sealing design. The lower bearing is designed as a rolling bearing. The combined skeleton oil seal structure has good sealing performance, extends the service life of the bearing, increases the reliability of the pump unit operation, and makes it convenient and quick to install, disassemble, and replace the bearings and seals. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the water tank of this utility model;

[0018] Figure 2 This is a schematic diagram of the structure of the water tank and the low-pressure zone inlet pipe of this utility model;

[0019] Figure 3 This is a schematic diagram of the structure of the protective tube of this utility model;

[0020] Figure 4 This is a schematic diagram of the field device structure of this utility model.

[0021] In the diagram: 1. Variable frequency motor; 2. Second sealing layer; 3. Water tank; 4. Water outlet pipe; 5. Drain pipe; 6. High-pressure zone water outlet pool; 7. Protective pipe; 8. First sealing layer; 9. Combined skeleton sealing structure; 10. Low-pressure zone water inlet pipe; 11. Water tank; 12. Slurry dilution pool. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0023] For examples, please refer to Figures 1-4 This utility model provides a technical solution:

[0024] A small to medium-sized axial flow pump that is easy to maintain and replace includes a water tank 3. A variable frequency motor 1 is installed on the top of the water tank 3. A second sealing layer 2 is fixedly connected between the bottom of the water tank 3 and the variable frequency motor 1. A low-pressure zone inlet pipe 10 is fixedly connected to the bottom of the water tank 3. A first sealing layer 8 is fixedly connected between the low-pressure zone inlet pipe 10 and the bottom of the water tank 3. An outlet pipe 4 is fixedly connected inside the water tank 3. The two ends of the outlet pipe 4 are respectively located between the first sealing layer 8 and the second sealing layer 2. A high-pressure zone outlet pool 6 is fixedly connected inside the water tank 3. Drain pipes 5 are fixedly connected inside the water tank 3 and are located on the side of the high-pressure zone outlet pool 6.

[0025] In this embodiment, as Figure 1 and Figure 2 As shown, a water tank 11 is fixedly connected to the side of the drain pipe 5, and a slurry dilution tank 12 is fixedly connected to the side of the water tank 11. The slurry dilution tank 12 is rectangular in shape. The water tank 11 is inclined between the water tank 3 and the slurry dilution tank 12. The water tank 11 is cylindrical in shape. A protective pipe 7 is fixedly connected inside the water outlet pipe 4. A combined skeleton sealing structure 9 is fixedly connected to the bottom of the protective pipe 7.

[0026] By changing the pump's discharge structure and adopting a water tank for water supply, the entire pump can be lifted out for maintenance and replacement of vulnerable parts, making assembly and disassembly very convenient and quick. It can also be used as a mobile drainage device. The structure of the lower bearing has been changed from a sliding bearing to a rolling bearing, and a combined skeleton oil seal has been adopted for sealing, making the product more widely applicable. The mounting surface is sealed with a rubber gasket, making it better suited for longer-distance transportation.

[0027] In this embodiment, as Figure 3 and Figure 4As shown, there are two drain pipes 5, which are positioned opposite each other and are located on the side of the outlet pipe 4. The variable frequency motor 1 is located at the top center of the water tank 3. The water tank 3 is made of stainless steel. There are two sets of outlet pipes 4, which are positioned opposite each other. The combined skeleton sealing structure 9 extends into the low-pressure inlet pipe 10 and is located directly below the protective pipe 7.

[0028] The pump is lifted out as a whole, making installation and maintenance convenient. It features an open pump outlet and a pressure-stabilizing water tank. The external sealing surface uses an adjustable sealing gasket for sealing, and the lower bearing is designed as a rolling bearing. The combined skeleton oil seal structure provides good sealing performance, extends the service life of the bearing, and increases the reliability of the pump unit. It also makes it convenient and quick to install, remove, and replace the bearings and seals.

[0029] The workflow of this utility model is as follows: The small and medium-sized axial flow pump designed using this scheme, which facilitates maintenance and replacement, is assembled in the factory. On-site installation includes: welding an mounting plate for leveling the pump and ensuring sealing; a first sealing layer 8 between the high-pressure and low-pressure zones; easy pump installation and maintenance by hoisting the entire pump out; an open pump outlet and a pressure-stabilizing water tank; an adjustable sealing gasket for the external sealing surface; a rolling bearing design for the lower bearing; and a combined skeleton oil seal structure, providing excellent sealing performance, extending bearing life, increasing pump reliability, and facilitating quick and easy bearing installation, removal, and seal replacement. It can also be used as a mobile drainage device. By changing the lower bearing structure from a sliding bearing to a rolling bearing and using a combined skeleton oil seal, the product's applicability is broadened. The mounting surface uses a rubber gasket for compression sealing, better suited for longer-distance transport. The combined skeleton oil seal structure provides excellent sealing performance, extends bearing life, increases pump reliability, and facilitates quick and easy bearing installation, removal, and seal replacement.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A small to medium-sized axial flow pump that is easy to maintain and replace, comprising a water tank (3), characterized in that: A variable frequency motor (1) is installed on the top of the water tank (3). A second sealing layer (2) is fixedly connected between the bottom of the water tank (3) and the variable frequency motor (1). A low-pressure zone inlet pipe (10) is fixedly connected to the bottom of the water tank (3). A first sealing layer (8) is fixedly connected between the low-pressure zone inlet pipe (10) and the bottom of the water tank (3). An outlet pipe (4) is fixedly connected inside the water tank (3). The two ends of the outlet pipe (4) are respectively located between the first sealing layer (8) and the second sealing layer (2). A high-pressure zone outlet pool (6) is fixedly connected inside the water tank (3). A drain pipe (5) is fixedly connected inside the water tank (3). The drain pipe (5) is located on the side of the high-pressure zone outlet pool (6).

2. A small to medium-sized axial flow pump that is easy to maintain and replace according to claim 1, characterized in that, A water tank (11) is fixedly connected to the side of the drain pipe (5), and a slurry dilution tank (12) is fixedly connected to the side of the water tank (11). The slurry dilution tank (12) is rectangular in shape.

3. A small to medium-sized axial flow pump that is easy to maintain and replace according to claim 2, characterized in that, The water tank (11) is inclined between the water tank (3) and the slurry dilution pool (12), and the water tank (11) is cylindrical in shape.

4. A small to medium-sized axial flow pump that is easy to maintain and replace according to claim 1, characterized in that, The water outlet pipe (4) is fixedly connected to a protective pipe (7), and the bottom of the protective pipe (7) is fixedly connected to a combined skeleton sealing structure (9).

5. A small to medium-sized axial flow pump that is easy to maintain and replace according to claim 1, characterized in that, There are two drain pipes (5), which are positioned opposite each other and are both located on the side of the outlet pipe (4).

6. A small to medium-sized axial flow pump that is easy to maintain and replace according to claim 1, characterized in that, The variable frequency motor (1) is located at the top center of the water tank (3), and the water tank (3) is made of stainless steel.

7. A small to medium-sized axial flow pump that is easy to maintain and replace according to claim 1, characterized in that, The water outlet pipe (4) is provided in two sets, and the two sets of water outlet pipe (4) are positioned opposite each other.

8. A small to medium-sized axial flow pump that is easy to maintain and replace according to claim 4, characterized in that, The combined skeleton sealing structure (9) extends into the low-pressure zone water inlet pipe (10), and the combined skeleton sealing structure (9) is located directly below the protective pipe (7).

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