Improved large-flow centrifugal pump

Abstract

The utility model discloses an improved large-flow centrifugal pump which comprises a connecting frame, a connecting rod is rotatably installed in the connecting frame, a motor is fixedly installed at one end of the connecting frame, an output shaft of the motor is fixedly installed at one end of the connecting rod, a pump shell is fixedly installed at one end of the connecting frame, and the connecting rod rotatably penetrates into the pump shell. A multi-stage pressurizing mechanism is rotatably mounted on the outer surface of the connecting rod in the pump shell, a communicating pipe is detachably mounted at one end of the water inlet of the pump shell, and a flow guide mechanism is rotatably mounted in the communicating pipe and fixedly mounted at one end of the connecting rod in the water inlet of the pump shell. Through the design of the flow guide mechanism and the multi-stage pressurization mechanism, the rotating threaded blades can reduce turbulent flow generated when liquid enters the pump, water flow is smoother and more stable, then the water inlet efficiency of the pump can be improved, meanwhile, the discharged liquid has high pressure, and the requirement for fluid pressure in daily use can be met.

Description

Technical Field

[0001] The utility model relates to the technical field of centrifugal pumps, in particular to an improved large-flow centrifugal pump. Background Art

[0002] A centrifugal pump is a pump that transports liquid by the centrifugal force generated by the rotation of the impeller. It is mainly composed of an impeller, a pump body, a pump shaft, bearings, sealing rings and a stuffing box. Its main features include: compact structure, a wide flow and head range, uniform flow, smooth operation, low vibration, and low maintenance and repair costs.

[0003] For example, the patent with the national authorized patent announcement number CN219587820U discloses an improved centrifugal pump, including a base and a motor, a motor is fixedly connected to the upper right side of the base, a centrifugal pump body is fixedly connected to the upper left side of the base, a sealing device is installed inside the centrifugal pump body, and a connecting device is installed on the right side of the sealing device. A sealed bearing can be installed on the middle outer wall of the pump shaft, and the sealed bearing is connected to the partition, so that the pump shaft can rotate stably at the partition through the sealed bearing, and preliminary sealing can be performed through the sealed bearing and the partition, and then a sealing ring and a baffle are installed in the middle of the pump shaft, so that the sealing effect at the pump shaft can be further improved through the sealing ring, and finally the centrifugal pump body can be assembled. In this way, through the double sealing structure, the centrifugal pump body has good sealing after being used for a period of time, thereby improving the use effect of the centrifugal pump body.

[0004] However, the above-mentioned improved centrifugal pump does not have the function of increasing the flow rate of the centrifugal pump during use, and cannot meet the system's demand for fluid, thereby causing the equipment to fail to achieve the expected working effect. Utility Model Content

[0005] The utility model aims to provide an improved large-flow centrifugal pump to solve the problem in the background art that the centrifugal pump does not have the function of increasing the flow rate during use, and thus cannot achieve the expected working effect during use.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] An improved large-flow centrifugal pump comprises: a connecting frame, a connecting rod is rotatably installed in the connecting frame, a motor is fixedly installed at one end of the connecting frame, the output shaft of the motor is fixedly installed at one end of the connecting rod, a pump casing is fixedly installed at one end of the connecting frame, the connecting rod is rotatably inserted into the pump casing and protrudes from the water inlet of the pump casing, and a multi-stage boosting mechanism is rotatably installed on the outer surface of the connecting rod located in the pump casing, a connecting pipe is detachably installed at one end of the water inlet of the pump casing, a flow guide mechanism is rotatably installed in the connecting pipe, and the flow guide mechanism is fixedly installed at one end of the connecting rod in the water inlet of the pump casing.

[0008] Preferably, the multi-stage boosting mechanism comprises a first impeller and a second impeller, the first impeller and the second impeller are both fixedly mounted on the outer surface of the connecting rod, and the first impeller and the second impeller are rotatably mounted in the pump casing.

[0009] Preferably, a separator ring is fixedly installed in the pump casing, and the separator ring is fixedly installed on the inner ring wall of the pump casing. The separator ring separates the first impeller and the second impeller in the chamber, and the impellers are connected through the inner ring opening of the separator ring, thereby forming a two-stage centrifugal pump.

[0010] Preferably, the water outlet of the pump casing is connected to the chamber of the second impeller.

[0011] Preferably, the flow guiding mechanism comprises a connecting column, the connecting column is fixedly mounted on one end of a connecting rod, a threaded blade is fixedly mounted on the outer surface of the connecting column, and the connecting column and the threaded blade rotate at the center of the connecting pipe.

[0012] Preferably, a conical disk is fixedly mounted on one end of the connecting column, and the diameter of the conical disk can shield the threaded blades.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. Through the design of the motor, water outlet, connecting pipe, guide mechanism and multi-stage boosting mechanism, when in use, the connecting rod can be driven to rotate by starting the motor, and the connecting rod can synchronously drive the multi-stage boosting mechanism and the guide mechanism to rotate in the pump casing and the connecting pipe respectively. The guide mechanism can guide the water flow to enter and reduce the turbulence entering the pump casing during the rotation in the connecting pipe, thereby making the water flow smoother and more stable, thereby improving the water supply efficiency of the pump, because the stable water flow reduces the energy loss, and at the same time, by applying the pre-rotating guide mechanism, the impact loss when the water enters the multi-stage boosting mechanism can be reduced, thereby improving the performance of the pump;

[0015] After the water enters the pump casing through the diversion mechanism, the multi-stage boosting mechanism will gradually increase the pressure of the liquid. After the last stage of boosting, the liquid will be discharged from the water outlet with a higher pressure, thereby achieving the function of boosting water flow, so that it can meet the needs of fluid pressure in daily use.

[0016] 2. Through the design of the connecting column, connecting rod, threaded blades and conical disk, when in use, the connecting rod can be driven to rotate by starting the motor, and then the connecting column fixedly installed at one end of the connecting rod can be driven to rotate in the connecting pipe, and the connecting column can drive the threaded blades on the outer surface to rotate, and the rotating threaded blades and conical disk can guide the flow of water in the connecting pipe, reduce the turbulence entering the pump, make the water flow smoother and more stable, and thus improve the water intake efficiency of the pump. The effect of the threaded blades being driven to pre-rotate by the connecting rod (so that the water starts to rotate before entering the first impeller) can reduce the impact loss when water enters the first impeller, thereby improving the performance of the pump.

[0017] 3. Through the design of the first impeller, the second impeller and the separator ring, when the water flows into the pump casing through the connecting pipe, a low-pressure area will be formed in the pump casing, and the liquid will be sucked into the first impeller. After the liquid enters the first impeller, under the action of the high-speed rotation of the first impeller, the liquid obtains centrifugal force and is thrown out into the chamber of the separator ring along the blades of the first impeller. As the speed of the first impeller increases, the pressure also increases until the liquid fills the entire chamber and then enters the second impeller through the inner ring opening of the separator ring. The inner ring wall of the separator ring is provided with guide vanes, and the function of the guide vanes is to adjust the flow direction of the liquid so that it can smoothly enter the second impeller and reduce the kinetic energy loss of the liquid. When the liquid enters the second impeller step by step through the guide vanes, the pressure of the liquid is increased once, and then the pressure of the liquid can be increased. After being pressurized by the second impeller, the liquid will be discharged from the water outlet, and the discharged liquid has a higher pressure, thereby achieving the function of pressurized water flow, so that it can meet the requirements of fluid pressure in daily use. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall structure of the improved large-flow centrifugal pump of the utility model;

[0019] Figure 2 This is a schematic diagram of the connecting pipe structure of the improved large-flow centrifugal pump of the utility model;

[0020] Figure 3 This is a schematic diagram of the structure of the flow guide mechanism of the improved large-flow centrifugal pump of the utility model;

[0021] Figure 4 This is a schematic diagram of the structure of the multi-stage boosting mechanism of the improved large-flow centrifugal pump of the utility model;

[0022] Figure 5 The utility model is a schematic diagram of the structure of the separator ring of the improved large-flow centrifugal pump.

[0023] In the figure: 1, connecting frame; 101, connecting rod; 2, pump housing; 201, water outlet; 3, motor; 4, connecting pipe; 5, flow guide mechanism; 501, connecting column; 502, threaded blades; 503, conical disk; 6, multi-stage boosting mechanism; 601, first impeller; 602, second impeller; 603, separator ring. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] See also Figure 1-Figure 5 , this embodiment provides the following technical solutions:

[0026] like Figure 1-Figure 2 As shown, an improved large-flow centrifugal pump comprises: a connecting frame 1, a connecting rod 101 is rotatably installed in the connecting frame 1, a motor 3 is fixedly installed at one end of the connecting frame 1, an output shaft of the motor 3 is fixedly installed at one end of the connecting rod 101, a pump casing 2 is fixedly installed at one end of the connecting frame 1, the connecting rod 101 is rotatably inserted into the pump casing 2 and protrudes from the water inlet of the pump casing 2, and a multi-stage boosting mechanism 6 is rotatably installed on the outer surface of the connecting rod 101 located in the pump casing 2, a connecting pipe 4 is disassembled and installed at one end of the water inlet of the pump casing 2, a flow guide mechanism 5 is rotatably installed in the connecting pipe 4, and the flow guide mechanism 5 is fixedly installed at one end of the connecting rod 101 in the water inlet of the pump casing 2.

[0027] Through the design of the motor 3, the water outlet 201, the connecting pipe 4, the guide mechanism 5 and the multi-stage boosting mechanism 6, when in use, the motor 3 can be started to drive the connecting rod 101 to rotate, and the connecting rod 101 can synchronously drive the multi-stage boosting mechanism 6 and the guide mechanism 5 to rotate in the pump housing 2 and the connecting pipe 4 respectively, and the guide mechanism 5 can guide the entry of water flow during the rotation in the connecting pipe 4 and reduce the turbulence entering the pump housing 2, thereby making the water flow smoother and more stable, thereby improving the water supply efficiency of the pump, because the stable water flow reduces energy loss, and at the same time, by applying the pre-rotated guide mechanism 5, the impact loss when water enters the multi-stage boosting mechanism 6 can be reduced, thereby improving the performance of the pump;

[0028] After the water enters the pump housing 2 through the flow guide mechanism 5, the multi-stage boosting mechanism 6 will gradually increase the pressure of the liquid. After the last stage of boosting, the liquid will be discharged from the water outlet 201 with a higher pressure, thereby achieving the function of boosting the water flow rate, so that it can meet the demand for fluid pressure in daily use.

[0029] like Figure 3 As shown, the flow guide mechanism 5 includes a connecting column 501, which is fixedly installed at one end of the connecting rod 101, and a threaded blade 502 is fixedly installed on the outer surface of the connecting column 501. The connecting column 501 and the threaded blade 502 rotate at the center of the connecting pipe 4.

[0030] A conical disk 503 is fixedly mounted on one end of the connecting column 501 , and the diameter of the conical disk 503 can shield the threaded blades 502 .

[0031] Through the design of the connecting column 501, the connecting rod 101, the threaded blades 502 and the conical disk 503, when in use, the connecting rod 101 can be driven to rotate by starting the motor 3, and then the connecting column 501 fixedly installed at one end of the connecting rod 101 can be driven to rotate in the connecting pipe 4, and the connecting column 501 can drive the threaded blades 502 on the outer surface to rotate, and the rotating threaded blades 502 and the conical disk 503 can guide the flow of water in the connecting pipe 4, reduce the turbulence entering the pump, and make the water flow smoother and more stable, thereby improving the water intake efficiency of the pump, and the effect of pre-rotating the threaded blades 502 driven by the connecting rod 101 makes the water start to rotate before entering the first impeller 601, which can reduce the impact loss when the water enters the first impeller 601, thereby improving the performance of the pump.

[0032] like Figure 4-Figure 5 As shown, the multi-stage boosting mechanism 6 includes a first impeller 601 and a second impeller 602 . The first impeller 601 and the second impeller 602 are both fixedly mounted on the outer surface of the connecting rod 101 , and the first impeller 601 and the second impeller 602 are rotatably mounted in the pump housing 2 .

[0033] A separator ring 603 is fixedly installed in the pump housing 2. The separator ring 603 is fixedly installed on the inner ring wall of the pump housing 2. The separator ring 603 separates the first impeller 601 and the second impeller 602 in the chamber, and the two are connected through the inner ring opening of the separator ring 603, thereby forming a two-stage centrifugal pump.

[0034] The water outlet 201 of the pump housing 2 is connected to the chamber of the second impeller 602 .

[0035] Through the design of the first impeller 601, the second impeller 602 and the separation ring 603, when the water flows into the pump housing 2 through the connecting pipe 4, a low-pressure area will be formed in the pump housing 2, thereby causing the liquid to be sucked into the first impeller 601. After the liquid enters the first impeller 601, under the action of the high-speed rotation of the first impeller 601, the liquid obtains centrifugal force and is thrown out into the chamber of the separation ring 603 along the blades of the first impeller 601. As the speed of the first impeller 601 increases, the pressure also increases. When the liquid fills the entire chamber, it will enter the second impeller 6 through the inner ring opening of the separation ring 603. 02, and the inner ring wall of the separation ring 603 is provided with guide vanes, and the function of the guide vanes is to adjust the flow direction of the liquid so that it can smoothly enter the second impeller 602 and reduce the kinetic energy loss of the liquid. When the liquid enters the second impeller 602 step by step through the guide vanes, the pressure of the liquid is increased once, and then the pressure of the liquid can be increased. After being pressurized by the second impeller 602, the liquid will be discharged from the water outlet 201, and the discharged liquid has a higher pressure, thereby achieving the function of pressurized water flow, so that it can meet the requirements of fluid pressure in daily use.

[0036] The working steps of this scheme are summarized and sorted out according to the above technical scheme: when in use, the connecting rod 101 can be driven to rotate by starting the motor 3, and the connecting rod 101 can synchronously drive the threaded blades 502, the first impeller 601 and the second impeller 602 to rotate together, and the rotating threaded blades 502 and the conical disk 503 can guide the flow of water in the connecting pipe 4, reduce the turbulence entering the pump, make the water flow smoother and more stable, and thus improve the water intake efficiency of the pump, and the threaded blades 502 are driven by the connecting rod 101 to pre-rotate. The water starts to rotate before entering the first impeller 601, which can reduce the impact loss when the water enters the first impeller 601, and the liquid is sucked into the first impeller 601 and then rotated at a high speed in the first impeller 601. Under the action of the centrifugal force, the liquid is thrown out into the chamber of the separation ring 603 along the blades of the first impeller 601, and as the speed of the first impeller 601 increases, the pressure also increases until the liquid fills the entire chamber and then enters the second impeller 602 through the inner ring opening of the separation ring 603. The inner ring wall of the separation ring 603 is provided with guide vanes, and the function of the guide vanes is to adjust the flow direction of the liquid so that it can smoothly enter the second impeller 602 and reduce the kinetic energy loss of the liquid. When the liquid enters the second impeller 602 step by step through the guide vanes, the pressure of the liquid is increased once, and then the pressure of the liquid can be increased. After being pressurized by the second impeller 602, the liquid will be discharged from the water outlet 201, and the discharged liquid has a higher pressure.

[0037] In summary: the rotating threaded blades 502 can reduce the turbulence of liquid entering the pump, making the water flow smoother and more stable, thereby improving the water intake efficiency of the pump, and at the same time making the discharged liquid have a higher pressure, so that it can meet the requirements of fluid pressure for daily use.

[0038] It is worth noting that the improved large-flow centrifugal pump can reach 500-600 cubic meters per hour.

[0039] Parts not involved in the present invention are the same as the prior art or can be implemented by the prior art. Although the embodiments of the present invention have been shown and described, it is understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. An improved large flow centrifugal pump, characterized in that: include: A connecting frame (1), a connecting rod (101) is rotatably mounted inside the connecting frame (1), a motor (3) is fixedly mounted on one end of the connecting frame (1), an output shaft of the motor (3) is fixedly mounted on one end of the connecting rod (101), a pump casing (2) is fixedly mounted on one end of the connecting frame (1), the connecting rod (101) is rotatably inserted into the pump casing (2) and protrudes from the water inlet of the pump casing (2), and a multi-stage boosting mechanism (6) is rotatably mounted on the outer surface of the connecting rod (101) located inside the pump casing (2), a connecting pipe (4) is detachably mounted on one end of the water inlet of the pump casing (2), a flow guide mechanism (5) is rotatably mounted inside the connecting pipe (4), and the flow guide mechanism (5) is fixedly mounted on one end of the connecting rod (101) inside the water inlet of the pump casing (2).

2. An improved large flow centrifugal pump according to claim 1, characterized in that: The multi-stage boosting mechanism (6) comprises a first impeller (601) and a second impeller (602); the first impeller (601) and the second impeller (602) are both fixedly mounted on the outer surface of the connecting rod (101); and the first impeller (601) and the second impeller (602) are rotatably mounted in the pump casing (2).

3. An improved large flow centrifugal pump according to claim 2, characterized in that: A separator ring (603) is fixedly installed in the pump casing (2). The separator ring (603) is fixedly installed on the inner ring wall of the pump casing (2). The separator ring (603) separates the first impeller (601) and the second impeller (602) in the chamber, and the two impellers are connected through the inner ring opening of the separator ring (603), thereby forming a two-stage centrifugal pump.

4. An improved large flow centrifugal pump according to claim 2, characterized in that: The water outlet (201) of the pump casing (2) is connected to the chamber of the second impeller (602).

5. The improved high-flow centrifugal pump according to claim 1, characterized in that: The flow guiding mechanism (5) comprises a connecting column (501), wherein the connecting column (501) is fixedly mounted on one end of a connecting rod (101), a threaded blade (502) is fixedly mounted on the outer surface of the connecting column (501), and the connecting column (501) and the threaded blade (502) rotate at the center of the connecting pipe (4).

6. An improved large flow centrifugal pump according to claim 5, characterized in that: A conical disk (503) is fixedly mounted on one end of the connecting column (501), and the diameter of the conical disk (503) is capable of shielding the threaded blades (502).

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