Single-stage single-suction centrifugal pump

Abstract

The utility model discloses a single-stage single-suction centrifugal pump, which belongs to the field of single-stage centrifugal pumps and is characterized in that a first convex block and a second convex block are mounted on a supporting seat through fasteners, and quick disassembly or assembly of a connecting pipe is realized by disassembling the fasteners and bolts at the connecting pipe and a pump cover; the rear end of the first splicing type connecting pipe is connected with a first splicing type coupler, the rear end of the second splicing type connecting pipe is connected with a second splicing type coupler matched with the first splicing type coupler, an oil injection port is formed in the butt joint position of the first splicing type coupler and the second splicing type coupler, and an outer port of the oil injection port is connected with an oil injection head. The oil filling port is exposed during dismounting, and impurity particles in the oil filling port can be cleaned conveniently to prevent blockage. The fastening piece and the bolt enable the connecting pipe body and the coupler to be disassembled and assembled quickly, and internal components such as a shaft, a bearing mechanism and a bearing can be replaced and overhauled conveniently. And the oil injection port is convenient to clean and maintain, ensures lubricating oil supply and prolongs the service life of the bearing.

Description

Technical Field

[0001] This utility model relates to the field of single-stage centrifugal pumps, and in particular to a single-stage single-suction centrifugal pump. Background Technology

[0002] A single-stage, single-suction centrifugal pump is a common type of pump. It has only one impeller and a single suction inlet. This type of pump has a simple structure, is easy to maintain, and is widely used in agricultural irrigation, industrial water supply, urban water supply, fire protection systems, and water treatment. The impeller of a single-stage, single-suction centrifugal pump is directly mounted on the motor shaft. The motor drives the impeller to rotate, generating centrifugal force that draws liquid in from the suction inlet and discharges it from the discharge outlet. This type of pump has a wide range of flow rates and heads, but is generally suitable for medium to low head applications.

[0003] In today's widely used single-stage, single-suction centrifugal pump equipment, maintenance work often encounters some formidable challenges. Specifically, due to the integrated, one-piece connecting pipe design of the shaft and bearing mechanism and pump cover, workers must undertake a significant amount of disassembly work during maintenance and component replacement. This disassembly work mainly involves the removal of numerous bolts, fasteners, and other related components, which not only consumes a considerable amount of time but also significantly increases the workload of the workers.

[0004] Furthermore, similar problems were encountered during the inspection and maintenance of bearings in the shaft and bearing mechanism. These problems not only affected the efficiency of the inspection but may also adversely affect the maintenance cycle and service life of the equipment, thereby impacting the stability and reliability of the entire system. Utility Model Content

[0005] The main objective of this invention is to provide a single-stage, single-suction centrifugal pump that can effectively solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] A single-stage, single-suction centrifugal pump includes a pump body, an outlet bend interface, a pump cover, a mounting base, a shaft and bearing mechanism, and a support base. The outlet bend interface is located on the side wall of the pump body, the pump cover is installed at the rear end of the pump body, and the shaft and bearing mechanism extends through the pump cover into the pump body.

[0008] The rear end of the pump cover is connected to a connecting pipe body consisting of a first splice connecting pipe and a second splice connecting pipe. The lower end of the first splice connecting pipe is provided with a first protrusion block, and the lower end of the second splice connecting pipe is provided with a second protrusion block that matches the first protrusion block. The first protrusion block and the second protrusion block are installed on the support base by fasteners. The fasteners and the bolts at the connection pipe and the pump cover are removed to achieve quick disassembly or installation of the connecting pipe.

[0009] The rear end of the first splice-type connecting pipe is connected to a first splice-type coupling, and the rear end of the second splice-type connecting pipe is connected to a second splice-type coupling that is compatible with the first splice-type coupling. An oil inlet is provided at the joint between the first splice-type coupling and the second splice-type coupling, and an oil inlet head is connected to the outer port of the oil inlet. When disassembling, the oil inlet is exposed to facilitate cleaning of impurities and particles inside the oil inlet to prevent blockage.

[0010] As a further optional solution of this utility model, the fastener includes a fastening bolt, a fastening nut, a sleeve and an anti-slip washer. The fastening bolt passes through the openings of the first protrusion and the second protrusion and is fitted with a fastening nut and an anti-slip washer to fix the two together.

[0011] As a further optional solution of this utility model, the side wall of the first splicing coupling is provided with a first connecting block, and the side wall of the second splicing coupling is provided with a second connecting block adapted to the first connecting block. The fastening bolt of the fastener passes through the opening of the first connecting block and the second connecting block and is fitted with a sleeve, a fastening nut and an anti-slip pad to achieve fixation. The sleeve separates the connecting block and the protrusion and prevents the connecting block and the protrusion from shifting or shaking.

[0012] As a further optional solution of this utility model, a sealing strip is provided at the connection between the first spliced ​​connecting pipe and the second spliced ​​connecting pipe. The first spliced ​​connecting pipe is fixed to the first spliced ​​coupling by bolts, and a sealing ring is provided between the two. The second spliced ​​connecting pipe is fixed to the second spliced ​​coupling by bolts, and a sealing ring is provided between the two.

[0013] As a further optional solution of this utility model, a sealing ring is provided between the first splicing coupling and the second splicing coupling, and the oil injection port is directly opposite the bearing assembly inside the coupling, through which lubricating oil flows into the bearing assembly;

[0014] As a further optional solution of this utility model, the mounting base is located on the side wall of the pump body for equipment installation. The bottom surfaces of the mounting base and the support base are on the same horizontal plane, and bolt mounting notches are provided on the mounting base and the support base for equipment installation.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] The connecting pipes and couplings can be quickly disassembled and installed using fasteners and bolts, greatly facilitating the rapid replacement and maintenance of internal components such as shafts, bearing mechanisms, and bearing assemblies. The grease port is designed for ease of cleaning and maintenance, ensuring a smooth supply of lubricating oil and extending bearing life. Through simple disassembly and installation steps, users can easily complete equipment maintenance and repair, thereby improving work efficiency.

[0017] Furthermore, the use of sealing strips and sealing rings ensures the sealing of the connecting pipe body and coupling, effectively preventing liquid and lubricating oil leakage. The design of the bolt mounting notch makes the installation and maintenance of the equipment more convenient and quick, facilitating regular inspection and maintenance.

[0018] The design of the mounting base and support ensures stable installation of the equipment, with the bottom surfaces on the same horizontal plane, which is conducive to the long-term stable operation of the equipment. This design not only improves the reliability of the equipment but also ensures its stability and durability in various working environments. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a side view of the overall structure of this utility model;

[0021] Figure 3 This is a side view of the overall structure of this utility model;

[0022] Figure 4 This is an exploded view of the pump cover and spliced ​​connecting pipe of this utility model;

[0023] Figure 5 This is an exploded view of the splicing connecting pipe and splicing coupling of this utility model;

[0024] Figure 6 for Figure 5 Enlarged diagram of point A in the middle.

[0025] In the diagram: 1. Pump body; 2. Outlet elbow interface; 3. Pump cover; 4. Mounting base; 5. Shaft and bearing mechanism; 6. First splice-type connecting pipe; 7. First protrusion block; 8. Second splice-type connecting pipe; 9. Second protrusion block; 11. First splice-type coupling; 12. Second splice-type coupling; 13. First connecting block; 14. Second connecting block; 15. Fastener; 16. Oil injection head; 17. Oil injection port; 18. Support base. Detailed Implementation

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

[0027] like Figure 1 - Figure 6As shown, a single-stage, single-suction centrifugal pump comprises a pump body 1, an outlet elbow interface 2, a pump cover 3, a mounting base 4, a shaft and bearing mechanism 5, and a support base 18. The outlet elbow interface 2 is located on the side wall of the pump body 1 and is used for connection with other equipment. The pump cover 3 is installed at the rear end of the pump body 1, and the shaft and bearing mechanism 5 extends through the pump cover 3 into the interior of the pump body 1 to ensure normal operation of the pump.

[0028] The rear end of the pump cover 3 is connected to a connecting pipe body consisting of a first spliced ​​connecting pipe 6 and a second spliced ​​connecting pipe 8. The lower end of the first spliced ​​connecting pipe 6 has a first protrusion 7, while the lower end of the second spliced ​​connecting pipe 8 has a second protrusion 9 that matches the first protrusion 7. These two protrusions are mounted on the support base 18 by fasteners 15, allowing for quick disassembly or installation of the connecting pipe body. Specifically, by removing the fasteners 15 and the bolts connecting the connecting pipe to the pump cover 3, the connecting pipe can be quickly disassembled or installed. After the connecting pipe is removed, the shaft and bearing mechanism 5, and the components of the pump cover 3 can be quickly replaced and repaired.

[0029] The rear end of the first splice-type connecting pipe 6 is connected to the first splice-type coupling 11, while the rear end of the second splice-type connecting pipe 8 is connected to the second splice-type coupling 12, which is compatible with the first splice-type coupling 11. An oil inlet 17 is provided at the mating point of the first splice-type coupling 11 and the second splice-type coupling 12, and an oil inlet head 16 is connected to the outer port of the oil inlet 17. When needed, the oil inlet 17 can be removed to facilitate cleaning of impurities inside the oil inlet 17 to prevent blockage. After quickly removing the coupling, the bearing assembly can be quickly replaced or repaired.

[0030] Fastener 15 includes a fastening bolt, a fastening nut, a sleeve, and an anti-slip washer. The fastening bolt passes through the openings in the first protrusion 7 and the second protrusion 9, and is fitted with the fastening nut and the anti-slip washer, thereby achieving fixation between the two. Furthermore, the side wall of the first splicing coupling 11 is provided with a first connecting block 13, while the side wall of the second splicing coupling 12 is provided with a second connecting block 14 adapted to the first connecting block 13. The fastening bolt of fastener 15 passes through the openings in the first connecting block 13 and the second connecting block 14, and is fitted with the sleeve, the fastening nut, and the anti-slip washer to achieve fixation. The sleeve serves to separate the connecting block and the protrusion, and to prevent the connecting block and the protrusion from shifting or wobbling.

[0031] A sealing strip is provided at the connection between the first splice-type connecting pipe 6 and the second splice-type connecting pipe 8 to ensure the sealing of the connecting pipe body. The first splice-type connecting pipe 6 is fixed to the first splice-type coupling 11 by bolts, and a sealing ring is provided between the two to prevent liquid leakage. Similarly, the second splice-type connecting pipe 8 is fixed to the second splice-type coupling 12 by bolts, and a sealing ring is also provided between the two to ensure sealing.

[0032] A sealing ring is provided between the first splice coupling 11 and the second splice coupling 12 to prevent lubricating oil leakage. The oil inlet 17 is directly opposite the bearing assembly inside the coupling. Lubricating oil can flow into the bearing assembly through the oil inlet 17 to ensure the lubrication of the bearing and extend its service life.

[0033] Mounting base 4 is located on the side wall of pump body 1 and is used for equipment installation. The bottom surface of mounting base 4 and support base 18 are on the same horizontal plane to ensure stable installation of the equipment. Bolt mounting notches are provided on mounting base 4 and support base 18 for fixing the equipment in place. This design makes equipment installation and maintenance more convenient and faster.

[0034] Disassembly and maintenance procedure: Ensure the pump is stopped and release the pressure inside the pump body 1. Remove fasteners 15 (fastening bolts, fastening nuts, sleeves, and anti-slip washers). Remove the bolts at the connection pipe and pump cover 3. Remove the first splice connection pipe 6 and the second splice connection pipe 8 from the support base 18. Remove the fastening bolts, sleeves, fastening nuts, and anti-slip washers from the first splice coupling 11 and the second splice coupling 12. Remove both couplings from the support base 18. Clean the inside of the oil inlet 17, ensuring there are no impurities clogging it. Inspect the shaft and bearing mechanism 5, pump cover 3, couplings, and bearing assemblies for wear. If necessary, replace worn bearing assemblies or other damaged parts. Reinstall new bearing assemblies and ensure they are lubricated. Reinstall the first splice coupling 11 and the second splice coupling 12 onto the support base 18 and secure fasteners 15. Reinstall the first splice-type connecting pipe 6 and the second splice-type connecting pipe 8 onto the coupling and tighten the fasteners 15. Ensure that all connections are properly sealed. Reconnect the power supply and perform a test run to ensure that the pump operates normally and without leakage.

[0035] Operating Procedure: Secure the pump body 1 in the appropriate position using the mounting base 4. Ensure the bottom surfaces of the mounting base 4 and the support base 18 are on the same horizontal plane to guarantee equipment stability. Connect the outlet elbow interface 2 to other equipment or pipelines, ensuring a tight, leak-free connection. Inject an appropriate amount of lubricating oil into the bearing assembly through the oil inlet 17 to ensure adequate lubrication. Turn on the power, start the pump, and observe its operation. Ensure the pump operates smoothly without abnormal noise or vibration. Regularly check the pump's operating status, including parameters such as pressure, flow rate, and temperature. Monitor for leaks or other abnormalities. Perform regular maintenance, including cleaning, inspection, and replacement of wearing parts. Ensure long-term stable operation of the equipment.

[0036] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A single-stage, single-suction centrifugal pump, comprising a pump body (1), an outlet bend interface (2), a pump cover (3), a mounting base (4), a shaft and bearing mechanism (5), and a support base (18), wherein the outlet bend interface (2) is located on the side wall of the pump body (1), the pump cover (3) is installed at the rear end of the pump body (1), and the shaft and bearing mechanism (5) extends through the pump cover (3) into the pump body (1), characterized in that: The rear end of the pump cover (3) is connected to a connecting pipe body consisting of a first splice connecting pipe (6) and a second splice connecting pipe (8). The lower end of the first splice connecting pipe (6) is provided with a first protrusion (7), and the lower end of the second splice connecting pipe (8) is provided with a second protrusion (9) that matches the first protrusion (7). The first protrusion (7) and the second protrusion (9) are installed on the support base (18) by fasteners (15). The fasteners (15) and the bolts at the connection pipe and the pump cover (3) are removed to achieve quick disassembly or installation of the connecting pipe. The rear end of the first splice-type connecting pipe (6) is connected to the first splice-type coupling (11), and the rear end of the second splice-type connecting pipe (8) is connected to the second splice-type coupling (12) that is compatible with the first splice-type coupling (11). The joint of the first splice-type coupling (11) and the second splice-type coupling (12) is provided with an oil inlet (17), and the outer port of the oil inlet (17) is connected to an oil inlet head (16). When disassembling, the oil inlet (17) is exposed, which facilitates cleaning of impurities and particles in the oil inlet (17) to prevent blockage.

2. A single-stage single-suction centrifugal pump according to claim 1, characterized in that: The fastener (15) includes a fastening bolt, a fastening nut, a sleeve and an anti-slip pad. The fastening bolt passes through the openings of the first protrusion (7) and the second protrusion (9) and is fitted with a fastening nut and an anti-slip pad to fix the two together.

3. A single-stage single-suction centrifugal pump according to claim 2, characterized in that: The first splicing coupling (11) has a first connecting block (13) on its side wall, and the second splicing coupling (12) has a second connecting block (14) that is adapted to the first connecting block (13) on its side wall. The fastening bolt of the fastener (15) passes through the opening of the first connecting block (13) and the second connecting block (14) and is fitted with a sleeve, a fastening nut and an anti-slip pad to achieve fixation. The sleeve separates the connecting block and the protrusion and prevents the connecting block and the protrusion from shifting or shaking.

4. A single-stage single-suction centrifugal pump according to claim 3, characterized in that: A sealing strip is provided at the connection between the first splice-type connecting pipe (6) and the second splice-type connecting pipe (8). The first splice-type connecting pipe (6) is fixed to the first splice-type coupling (11) by bolts, and a sealing ring is provided between the two. The second splice-type connecting pipe (8) is fixed to the second splice-type coupling (12) by bolts, and a sealing ring is provided between the two.

5. A single-stage single-suction centrifugal pump according to claim 4, characterized in that: A sealing ring is provided between the first splice coupling (11) and the second splice coupling (12). The oil inlet (17) is directly opposite the bearing assembly inside the coupling, and lubricating oil flows into the bearing assembly through the oil inlet (17).

6. A single-stage single-suction centrifugal pump according to claim 5, characterized in that: The mounting base (4) is located on the side wall of the pump body (1) for equipment installation. The bottom surface of the mounting base (4) and the support base (18) are on the same horizontal plane, and bolt installation notches are provided on the mounting base (4) and the support base (18) for equipment installation.

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