A centrifugal water pump

Abstract

The present invention discloses a centrifugal water pump, belonging to the technical field of water pumps. A centrifugal water pump includes: a pump casing; a pump shaft, which is horizontally rotatably connected within the pump casing; a partition plate, which is fixedly connected within the pump casing at equal intervals. The pump casing is divided into multiple pump chambers by the partition plate. Through holes are formed in the partition plates inside the pump casing, and the multiple pump chambers communicate with each other through the through holes. The central axes of the multiple through holes are on the same central straight line, and the pump shaft horizontally passes through the multiple partition plates in sequence; the present invention can control the size of the water flow head by opening or closing the corresponding number of pump chambers. Compared with the prior art, without changing the flow rate, the size of the water flow head can be flexibly changed, and there is no need to replace the centrifugal water pump with the corresponding number of pump chambers or disassemble the centrifugal water pump to increase or decrease the pump chambers to change the water flow head, which can not only reduce the use cost, but also greatly improve the working efficiency of the centrifugal water pump.

Description

Technical Field

[0001] The present invention relates to the technical field of centrifugal water pumps, and particularly to a centrifugal water pump. Background Art

[0002] A centrifugal pump works by using the rotation of an impeller to cause centrifugal motion of water. Before starting the pump, the pump casing and the suction pipe must be filled with water. Then, the motor is started, causing the pump shaft to drive the impeller and water to rotate at high speed. The water undergoes centrifugal motion and is thrown towards the outer edge of the impeller, flowing into the pressure water pipeline of the pump through the flow channel of the pump casing.

[0003] Multistage centrifugal pumps have the characteristics of compact structure and high output pressure, and are widely used in fields such as municipal water supply, petrochemical industry, agricultural irrigation, and industrial processes. The high-speed rotation of the impeller drives the fluid to move, and the fluid enters the next-stage impeller through the guide vane. The fluid is accelerated again in the next-stage impeller, and in this way, the multistage centrifugal pump can provide a very high output head.

[0004] However, in the actual use process, the requirements for the head are constantly changing, and the traditional multistage pump itself cannot change the head. The most common method is to change the head by adjusting the valve opening, which may cause more energy waste and component wear, and the flow rate will also change accordingly. There is also a way to change the head by replacing the centrifugal water pump with the corresponding number of pump chambers or disassembling the centrifugal water pump to increase or decrease the pump chambers. This requires stopping the pump from working and disassembling it. Although the flow rate can remain unchanged, the working efficiency needs to be further improved. In view of this, the present invention is specifically proposed. Summary of the Invention

[0005] The purpose of the present invention is to solve the problems raised in the above background art, and to propose a centrifugal water pump.

[0006] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0007] A centrifugal water pump, comprising: a pump casing; a pump shaft, horizontally rotatably connected within the pump casing; a partition, fixedly connected at equal intervals within the pump casing, and the pump casing is divided into multiple pump chambers by the partition. Through holes are formed in the partitions within the pump casing, and the multiple pump chambers communicate with each other through the through holes. The central axes of the multiple through holes are on the same central straight line, and the pump shaft horizontally passes through the multiple partitions in sequence; a sealing plate, slidably attached to the same side of the multiple partitions; the sizes of the multiple sealing plates gradually increase; an impeller, rotatably disposed within the pump chamber and fixedly connected to the pump shaft; a guide shell, fixedly connected within the pump chamber, and the guide shell is located at the water suction end of the impeller.

[0008] For the convenience of driving the pump shaft to rotate quickly and facilitating the installation and fixation of the centrifugal water pump, preferably, it further includes a frame and a motor. The motor is fixedly connected to one end of the frame through a first mounting bracket. The pump casing is fixedly connected to one side of the frame close to the output end of the motor through a second mounting bracket. One end of the pump shaft close to the motor is fixedly connected to the output end of the motor through a coupling.

[0009] For the convenience of driving multiple sealing plates to rotate to seal the through holes, further, a T-shaped limit groove ring is provided on the side of the partition away from the motor. A T-shaped ring is rotatably connected in the T-shaped limit groove ring. A transmission internal gear ring is fixedly connected to the side of the T-shaped ring away from the partition. The inner side of the pump shaft close to the transmission internal gear ring is rotated with a transmission external gear ring through a first ratchet. The transmission external gear ring meshes with the transmission internal gear ring. The sealing plate is fixedly connected to the transmission internal gear ring.

[0010] Further, a water inlet pipe is fixedly connected to the side of the pump casing away from the motor. An outlet cavity is provided in the casing wall on one side of the pump casing. Each pump chamber is provided with an outlet hole communicating with the outlet cavity on the side close to the outlet cavity. An electromagnetic valve is installed in the outlet hole. One end of the pump casing close to the water inlet pipe is connected with an outlet pipe communicating with the outlet cavity.

[0011] For the convenience of enabling the water flowing out of the outlet hole to be directly discharged without passing through the outlet cavity and ensuring the outlet head, further, a water diversion box is slidably connected in the outlet cavity. The water diversion box is slidably attached to the inner wall of the outlet cavity. The water inlet of the water diversion box faces the side of the outlet hole. The water inlet of the outlet pipe is communicated with the water outlet of the water diversion box. The water diversion box is connected to the pump shaft through a transmission component.

[0012] For the convenience of driving the sealing plate to rotate, furthermore, the transmission component includes a lead screw, a sleeve, a first gear, a second gear, and a third gear. The lead screw is arranged in the outlet cavity. One end of the lead screw close to the water diversion box is fixedly connected to the water diversion box. The other end of the lead screw away from the water diversion box penetrates through the pump casing. The sleeve is rotatably connected to one end of the pump casing away from the outlet pipe. The sleeve is sleeved on the lead screw and is threadedly connected to the lead screw. The first gear is fixedly connected to the sleeve. The second gear is connected to the pump shaft close to the first gear through a second ratchet. The third gear is rotatably connected between the first gear and the second gear. The third gear meshes with the first gear and the second gear.

[0013] For the convenience of improving the sealing performance between the water inlet pipe, the outlet pipe and the external water pipe, furthermore, the water inlet of the water inlet pipe and the water outlet of the outlet pipe are respectively sealed and connected to the external water pipe through sealing shell rings.

[0014] In order to facilitate the firm connection of the water inlet pipe, the water outlet pipe and the external water pipe, further, conical collar rings are fixedly connected to both sides of the sealing shell ring, and rotating rings are respectively rotationally connected to the water inlet pipe, the water outlet pipe and the external water pipe through threads.

[0015] In order to facilitate alarm in case of water leakage in the water pipe to remind the staff to carry out maintenance, further, a detection cavity is provided above the interior of the sealing shell ring. A floating plate is hermetically and slidably connected in the detection cavity. A metal plate is fixedly connected to the upper side of the floating plate. A buzzer is fixedly connected to the upper end of the sealing shell ring close to the detection cavity. The electrode head on the buzzer extends into the detection cavity. A metal contact is fixedly connected to the position of the metal plate close to the electrode head.

[0016] In order to facilitate the sealing between the partition plate and the pump shaft, preferably, the partition plate and the pump shaft are connected through a sealing shaft sleeve.

[0017] Compared with the prior art, the present invention provides a centrifugal water pump, which has the following beneficial effects:

[0018] 1. For this centrifugal water pump, through the settings of the T-shaped limit groove ring, the T-shaped ring, the transmission internal gear ring, the first ratchet wheel, the transmission external gear ring and a plurality of sealing plates with gradually increasing sizes, when this centrifugal water pump is in use, the magnitude of the water flow head can be controlled by opening or closing the corresponding number of pump cavities. Compared with the multi-stage centrifugal water pumps in the prior art, under the condition of keeping the flow rate unchanged, the magnitude of the water flow head can be flexibly changed, and there is no need to replace the centrifugal water pump with the corresponding number of pump cavities or disassemble the centrifugal water pump to increase or decrease the pump cavities to change the water flow head. The flexibility is relatively high. It can not only reduce the use cost, but also greatly improve the working efficiency of the centrifugal water pump, effectively improving the applicability of this centrifugal water pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic structural view of a centrifugal water pump proposed by the present invention Figure 1 ;

[0020] Figure 2 is a schematic structural view of a centrifugal water pump proposed by the present invention Figure 2 ;

[0021] Figure 3 is a schematic structural view of the pump shell, the water outlet cavity, the water diversion box, the water outlet pipe, the lead screw and the water outlet hole in a centrifugal water pump proposed by the present invention;

[0022] Figure 4 is a schematic structural view of the pump shell, the water inlet pipe, the water outlet pipe, the partition plate, the impeller and the guide shell in a centrifugal water pump proposed by the present invention;

[0023] Figure 5Structural schematic diagram of the pump shaft, second gear, sealing plate and partition plate in a centrifugal water pump proposed by the present invention;

[0024] Figure 6 Exploded structural schematic diagram of the partition plate, T-ring, transmission external gear ring, transmission internal gear ring, sealing plate, first ratchet wheel, impeller and guide shell in a centrifugal water pump proposed by the present invention;

[0025] Figure 7 Structural schematic diagram of multiple transmission internal gear rings and sealing plates in a centrifugal water pump proposed by the present invention;

[0026] Figure 8 Structural schematic diagram of the water outlet pipe, water diversion box, sealing shell ring, conical collar, rotating ring and transmission assembly in a centrifugal water pump proposed by the present invention;

[0027] Figure 9 Exploded structural schematic diagram of the water outlet pipe, water diversion box, sealing shell ring, conical collar, rotating ring and transmission assembly in a centrifugal water pump proposed by the present invention;

[0028] Figure 10 Structural schematic diagram of the sealing shell ring, floating plate, metal plate, contact, buzzer, arc-shaped clamping plate, sealing ring, pull rope and roller in a centrifugal water pump proposed by the present invention.

[0029] In the figure: 1, frame; 2, motor; 201, first mounting bracket; 3, coupling; 4, pump casing; 401, second mounting bracket; 402, water inlet pipe; 403, water outlet pipe; 404, water outlet cavity; 405, water outlet hole; 406, water diversion box; 407, lead screw; 408, sleeve; 409, first gear; 5, pump shaft; 6, sealing shell ring; 601, conical collar; 602, rotating ring; 603, sealing ring; 604, arc-shaped clamping plate; 605, floating plate; 606, metal plate; 607, buzzer; 608, metal contact; 609, pull rope; 6010, roller; 7, partition plate; 701, through hole; 702, sealing shaft sleeve; 703, T-shaped limit groove ring; 704, T-ring; 705, transmission internal gear ring; 706, sealing plate; 707, first ratchet wheel; 708, transmission external gear ring; 8, impeller; 9, guide shell; 10, second gear; 11, third gear; 12, second ratchet wheel. Detailed implementation manners

[0030] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0031] Example 1: Refer to Figures 1 - 10, a centrifugal water pump, comprising: a pump housing 4; a pump shaft 5, horizontally rotatably connected within the pump housing 4; a partition plate 7, fixedly connected within the pump housing 4 at equal intervals, and the pump housing 4 is divided into multiple pump chambers by the partition plate 7. Through holes 701 are formed in the partition plates 7 within the pump housing 4, and the multiple pump chambers communicate with each other through the through holes 701. The central axes of the multiple through holes 701 are on the same central straight line, and the pump shaft 5 horizontally passes through the multiple partition plates 7 in sequence; a sealing plate 706, slidably attached to the same side of the multiple partition plates 7; the sizes of the multiple sealing plates 706 gradually increase; an impeller 8, rotating within the pump chamber and fixedly connected to the pump shaft 5; a guide housing 9, fixedly connected within the pump chamber, and the guide housing 9 is located at the water suction end of the impeller 8;

[0032] It further includes a frame 1 and a motor 2. The motor 2 is fixedly connected to one end of the frame 1 through a first mounting bracket 201. The pump housing 4 is fixedly connected to one side of the frame 1 close to the output end of the motor 2 through a second mounting bracket 401. One end of the pump shaft 5 close to the motor 2 is fixedly connected to the output end of the motor 2 through a coupling 3;

[0033] A T-shaped limiting groove ring 703 is formed on the side of the partition plate 7 away from the motor 2. A T-shaped ring 704 is rotatably connected within the T-shaped limiting groove ring 703. A transmission internal gear ring 705 is fixedly connected to the side of the T-shaped ring 704 away from the partition plate 7. A transmission external gear ring 708 is rotatably connected to the inner side of the pump shaft 5 close to the transmission internal gear ring 705 through a first ratchet 707. The transmission external gear ring 708 meshes with the transmission internal gear ring 705, and the sealing plate 706 is fixedly connected to the transmission internal gear ring 705;

[0034] A water inlet pipe 402 is fixedly connected to the side of the pump housing 4 away from the motor 2. An outlet cavity 404 is formed within the wall of one side of the pump housing 4. An outlet hole 405 communicating with the outlet cavity 404 is formed on the side of each pump chamber close to the outlet cavity 404. An electromagnetic valve is installed within the outlet hole 405. A water outlet pipe 403 communicating with the outlet cavity 404 is connected to one end of the pump housing 4 close to the water inlet pipe 402.

[0035] When it is necessary to use this centrifugal water pump to transport water or other flowing liquids, at this time, the staff first carry the centrifugal water pump to the side of the reservoir, then fix the frame 1 to the side of the reservoir through ground bolts, then install the motor 2 and the pump housing 4 on the frame 1 through the first mounting bracket 201 and the second mounting bracket 401, then connect the pump shaft 5 to the output end of the motor 2 through the coupling 3, and finally connect the water inlet pipe 402 and the water outlet pipe 403 to the external water delivery pipe and the drain pipe respectively to complete the installation work of this centrifugal water pump;

[0036] When the centrifugal water pump needs to work, first start the motor 2 at this time, so that the motor 2 drives the pump shaft 5 to rotate forward through the coupling 3. Since the transmission external gear ring 708 is connected to the pump shaft 5 through the first ratchet 707, when the pump shaft 5 rotates forward, the transmission external gear ring 708 will rotate idly, so it will not drive the sealing plate 706 to rotate. From Figure 4 It can be seen that the pump casing 4 is divided into five pump chambers by four partitions 7. These five pump chambers are the first-stage pump chamber, the second-stage pump chamber, the third-stage pump chamber, the fourth-stage pump chamber and the fifth-stage pump chamber in turn from one end of the water inlet pipe 402 to one end of the motor 2. Therefore, when the water flow is sucked into the pump casing 4 through the water inlet pipe 402, it will first be sucked into the first-stage pump chamber under the action of the negative pressure suction generated by the impeller 8 in the first-stage pump chamber for acceleration. Then the impeller 8 in the second-stage pump chamber will suck the water flow in the first-stage pump chamber into the second-stage pump chamber through the through hole 701 for acceleration. The impeller 8 in the third-stage pump chamber will suck the water flow in the second-stage pump chamber into the third-stage pump chamber through the through hole 701 for acceleration. The impeller 8 in the fourth-stage pump chamber will suck the water flow in the third-stage pump chamber into the fourth-stage pump chamber through the through hole 701 for acceleration. The impeller 8 in the fifth-stage pump chamber will suck the water flow in the fourth-stage pump chamber into the fifth-stage pump chamber through the through hole 701 for acceleration. After multiple centrifugal accelerations, the head of the water flow can be increased while keeping the flow rate unchanged;

[0037] Among them, the sizes of multiple sealing plates 706 gradually increase from the water inlet pipe 402 to one end of the motor 2. Therefore, when it is necessary to change the head of the water flow, the motor 2 is controlled to reverse at this time. The pump shaft 5 will drive the transmission external gear ring 708 to rotate under the action of the first ratchet 707. Since the transmission external gear ring 708 meshes with the transmission internal gear ring 705, and the transmission internal gear ring 705 rotates on the partition plate 7 through the T-ring 704, the transmission external gear ring 708 will drive the transmission internal gear ring 705 to rotate stably with the cooperation of the T-ring 704. The transmission internal gear ring 705 will drive the sealing plate 706 to rotate. Since the through holes 701 on each partition plate 7 are arranged on the same central straight line, when the four sealing plates 706 rotate, the sealing plates 706 in the four-stage pump cavity will first seal the through holes 701 on the adjacent partition plates 7, so as to close the five-stage pump cavity, so that the water flow only passes through the first four-stage pump cavities for centrifugal acceleration. When only one-stage pump cavity is required to perform centrifugal acceleration on the water flow, after the sealing plate 706 in the four-stage pump cavity seals the adjacent through hole 701, the pump shaft 5 is rotated continuously. Then, the sealing plate 706 in the three-stage pump cavity will seal the through hole 701 communicating with the four-stage pump cavity. Then, the pump shaft 5 is rotated continuously, and the sealing plate 706 in the two-stage pump cavity will seal the through hole 701 communicating with the three-stage pump cavity. Then, the pump shaft 5 is rotated again until the sealing plate 706 in the one-stage pump cavity seals the through hole 701 communicating with the two-stage pump cavity. Since the sizes of the multiple sealing plates 706 gradually increase from the water inlet pipe 402 to one end of the motor 2, after the sealing plate 706 in the one-stage pump cavity seals the through hole 701 communicating with the two-stage pump cavity, the remaining sealing plates 706 will still seal the corresponding through holes 701 all the time, so as to complete the sealing work of the two-stage pump cavity, the three-stage pump cavity, the four-stage pump cavity and the five-stage pump cavity. Then, the solenoid valves at the water outlet holes 405 where the two-stage pump cavity, the three-stage pump cavity, the four-stage pump cavity and the five-stage pump cavity communicate with the water outlet cavity 404 are closed, and the water outlet hole 405 where the one-stage pump cavity communicates with the water outlet cavity 404 is opened. At this time, the water flow centrifugally accelerated by the one-stage pump cavity will flow into the water outlet cavity 404, and the water flow with reduced head will be discharged through the water outlet pipe 403. Through the arrangement of the T-shaped limit groove ring 703, the T-ring 704, the transmission internal gear ring 705, the first ratchet 707, the transmission external gear ring 708 and multiple sealing plates 706 with gradually increasing sizes, when the centrifugal water pump is in use, the head of the water flow can be controlled by opening or closing the corresponding number of pump cavities. Compared with the multi-stage centrifugal water pumps in the prior art, the size of the water flow head can be changed flexibly, without replacing the centrifugal water pump with the corresponding number of pump cavities or disassembling and adding or reducing the pump cavities of the centrifugal water pump to change the water flow head. The flexibility is relatively high, which can not only reduce the use cost, but also greatly improve the working efficiency of the centrifugal water pump, and effectively improve the applicability of the centrifugal water pump.

[0038] Embodiment 2: Refer toFigures 1 - 10 , a centrifugal water pump, which is basically the same as Embodiment 1. Further, a water diversion box 406 is slidably connected in the water outlet cavity 404. The water diversion box 406 is slidably attached to the inner wall of the water outlet cavity 404. The water inlet of the water diversion box 406 faces the side of the water outlet hole 405. The water inlet of the water outlet pipe 403 is communicated with the water outlet of the water diversion box 406. The water diversion box 406 is connected to the pump shaft 5 through a transmission assembly;

[0039] The transmission assembly includes a lead screw 407, a sleeve 408, a first gear 409, a second gear 10 and a third gear 11. The lead screw 407 is arranged in the water outlet cavity 404. One end of the lead screw 407 close to the water diversion box 406 is fixedly connected to the water diversion box 406. The end of the lead screw 407 far from the water diversion box 406 penetrates through the pump housing 4. The sleeve 408 is rotatably connected to one end of the pump housing 4 far from the water outlet pipe 403. The sleeve 408 is sleeved on the lead screw 407 and is threadedly connected to the lead screw 407. The first gear 409 is fixedly connected to the sleeve 408. The second gear 10 is connected to the pump shaft 5 near the first gear 409 through a second ratchet 12. The third gear 11 is rotatably connected between the first gear 409 and the second gear 10. The third gear 11 meshes with the first gear 409 and the second gear 10.

[0040] When the staff controls the reverse rotation of the pump shaft 5 through the motor 2 to drive the sealing plate 706 to rotate, since the transmission external gear ring 708 and the second gear 10 are respectively connected to the pump shaft 5 through the first ratchet 707 and the second ratchet 12, and the acting directions of the first ratchet 707 and the second ratchet 12 are the same, when the pump shaft 5 rotates forward, both the transmission external gear ring 708 and the second gear 10 will rotate idly. Therefore, when the pump shaft 5 rotates reversely, it will drive the transmission external gear ring 708 and the second gear 10 to rotate simultaneously. When the transmission external gear ring 708 drives a plurality of sealing plates 706 to rotate through the transmission internal gear ring 705, the second gear 10 will drive the first gear 409 to rotate through the third gear 11, the first gear 409 will drive the sleeve 408 to rotate, the sleeve 408 will drive the lead screw 407 to move in the water outlet cavity 404 through the thread, and the lead screw 407 will drive the water diversion box 406 to move. When the sealing plate 706 in the four-stage pump cavity seals the through hole 701 communicating with the five-stage pump cavity, at this time, the lead screw 407 will drive the water diversion box 406 to move to the water outlet hole 405 where the four-stage pump cavity is connected to the water outlet cavity 404. Then, the water inlet of the water diversion box 406 will be aligned with the adjacent water outlet hole 405. Then, the solenoid valve at the water outlet hole 405 at this time is opened, and the solenoid valves at other water outlet holes 405 are closed. At this time, water enters the pump housing 4, and the water that has been accelerated four times will be discharged through the water outlet pipe 403. When it is necessary to reduce the head of the drain pipe connected to the water outlet pipe 403, at this time, the pump shaft 5 is controlled to rotate reversely again, so that the sealing plate 706 in the three-stage pump cavity or the two-stage pump cavity seals the through hole 701 communicating with the upper stage. Then, the water diversion box 406 will come to the corresponding water outlet hole 405, so that the water outlet head of the external drain pipe can be flexibly changed, effectively improving the flexibility of the centrifugal water pump and expanding the scope of use.

[0041] Embodiment 3: Refer to Figures 1 - 10 , a centrifugal water pump, which is basically the same as Embodiment 2. Further, the water inlet of the water inlet pipe 402 and the water outlet of the water outlet pipe 403 are respectively hermetically connected to the external water pipe through the sealing housing ring 6;

[0042] Conical collar rings 601 are fixedly connected to both sides of the sealing housing ring 6, and rotating rings 602 are respectively rotatably connected to the water inlet pipe 402, the water outlet pipe 403 and the external water pipe through threads;

[0043] A detection cavity is provided above the interior of the sealing housing ring 6. A floating plate 605 is hermetically and slidably connected in the detection cavity. A metal plate 606 is fixedly connected to the upper side of the floating plate 605. A buzzer 607 is fixedly connected to the upper end of the sealing housing ring 6 close to the detection cavity. The electrode head on the buzzer 607 extends into the detection cavity, and a metal contact 608 is fixedly connected to the position of the metal plate 606 close to the electrode head.

[0044] When installing the centrifugal water pump, first fix the centrifugal water pump beside the reservoir. Then, the rotating ring 602 can be rotationally connected to the inlet pipe 402, the outlet pipe 403, and the external water pipe through threads. Next, the sealing shell ring 6 is sleeved at the water inlet of the inlet pipe 402 and the water outlet of the outlet pipe 403. Then, the water outlet of the external water delivery pipe and the water inlet of the drain pipe are respectively installed at the water inlet of the inlet pipe 402 and the water outlet of the outlet pipe 403, and the sealing shell ring 6 is located at the interface of every two water pipes. Then, the rotating ring 602 can be rotated to make the rotating ring 602 gradually move towards one side of the sealing shell ring 6. When the rotating ring 602 contacts the conical sleeve ring 601, continue to rotate the rotating ring 602 until it cannot be rotated anymore. Then, the conical sleeve ring 601 will closely adhere to the outer wall of the water pipe under the extrusion of the rotating ring 602, thereby completing the sealed connection between every two water pipes, effectively improving the sealing performance between the water pipes. When there is leakage at the gap between the water pipes, the leaked water will accumulate in the sealing shell ring 6. As the water level in the sealing shell ring 6 continuously rises, when the water surface contacts the floating plate 605, the floating plate 605 will move upward under the action of buoyancy. Then, the floating plate 605 will drive the metal plate 606 to move upward. When the metal contact 608 on the metal plate 606 contacts the electrode head at the bottom of the buzzer 607, the buzzer 607 will be turned on, and then the buzzer 607 will emit an alarm sound, notifying the staff to repair the leakage point in the first time. At the same time, it can accurately inform the staff of the leakage location, which is convenient and fast, saving time for the staff and ensuring that the centrifugal water pump can be put into work again most quickly.

[0045] Example 4: Refer to Figures 1 - 10, A centrifugal water pump, which is basically the same as that in Embodiment 3. Further, a sealing ring 603 is provided inside the sealing housing ring 6. The sealing ring 603 is sleeved at the positions where the water inlet pipe 402 and the water outlet pipe 403 are respectively connected to the external water pipes. Two arc-shaped clamping plates 604 can be symmetrically connected to the outside of the sealing ring 603. The upper ends of the two arc-shaped clamping plates 604 are rotatably connected through a rotating shaft. A plurality of rollers 6010 are symmetrically installed at equal intervals on the inner wall of the sealing housing ring 6. One end of the arc-shaped clamping plate 604 away from the rotating shaft is connected to a floating plate 605 through a pull rope 609. The two pull ropes 609 are respectively wound around the rollers 6010 away from the arc-shaped clamping plate 604 on the same side. When water leaks at the positions where the water inlet pipe 402 and the water outlet pipe 403 are respectively connected to the external water pipes, the leaked water will seep into the sealing housing ring 6 through the water pipe connection gap. As the water level in the sealing housing ring 6 continuously rises, when the water surface contacts the floating plate 605, the floating plate 605 will move upward under the action of buoyancy. Since the floating plate 605 slides in the detection cavity in a sealed manner, water will not seep above the floating plate 605 to corrode the electrode head of the buzzer 607, effectively improving the protection effect on the buzzer 607. When the floating plate 605 moves upward, it will pull the arc-shaped clamping plate 604 through the pull rope 609, so that the two arc-shaped clamping plates 604 can rotate relative to each other to press the sealing ring 603, making the gap between the sealing ring 603 and the water pipe fit more tightly, thereby preventing water from seeping out of the gap and effectively improving the sealing effect between the water pipes. Therefore, when water seeps at the water pipe connection, the water pipe connection will be sealed first. When it cannot be sealed, the buzzer 607 will give an alarm to notify the staff to repair the connection.

[0046] Embodiment 5: Refer to Figures 1 - 10 , A centrifugal water pump, which is basically the same as that in Embodiment 4. Further, the partition plate 7 and the pump shaft 5 are connected through a sealing shaft sleeve 702. By connecting the partition plate 7 and the pump shaft 5 through the sealing shaft sleeve 702, the connection between the partition plate 7 and the pump shaft 5 can be sealed, preventing water from flowing into the sealed pump cavity through the connection between the partition plate 7 and the pump shaft 5 after the partial pump cavity is sealed, effectively improving the sealing effect of the water pump.

[0047] Through the settings of the T-shaped limit groove ring 703, the T-shaped ring 704, the transmission internal gear ring 705, the first ratchet 707, the transmission external gear ring 708, and multiple closing plates 706 with gradually increasing sizes, when the centrifugal water pump is in use, the water flow head can be controlled by opening or closing the corresponding number of pump chambers. Compared with the multi-stage centrifugal water pumps in the prior art, the size of the water flow head can be flexibly changed while keeping the flow rate unchanged, and there is no need to replace the centrifugal water pump with a corresponding number of pump chambers or disassemble the centrifugal water pump to increase or decrease the pump chambers to change the water flow head. The flexibility is relatively high, which can not only reduce the use cost, but also greatly improve the working efficiency of the centrifugal water pump, effectively improving the applicability of the centrifugal water pump.

[0048] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, making equivalent replacements or changes, shall be covered by the protection scope of the present invention.

Claims

1. A centrifugal water pump, characterized in that, Comprising: Pump casing (4); Pump shaft (5), transversely rotatably connected within the pump casing (4); Partition plates (7), fixedly connected at equal intervals within the pump casing (4), the interior of the pump casing (4) being divided into multiple pump chambers by the partition plates (7), through holes (701) being provided in each of the partition plates (7) within the interior of the pump casing (4), the multiple pump chambers being communicated with each other through the through holes (701), the central axes of the multiple through holes (701) being on the same central straight line, the pump shaft (5) transversely passing through the multiple partition plates (7) in sequence; Sealing plates (706), slidably adhering to the same side of the multiple partition plates (7); The sizes of the multiple sealing plates (706) gradually increase; Impellers (8), rotating within the pump chambers and fixedly connected to the pump shaft (5); Flow guide shells (9), fixedly connected within the pump chambers, the flow guide shells (9) being located at the water suction end of the impellers (8); Also included are a frame (1) and a motor (2), the motor (2) being fixedly connected to one end of the frame (1) through a first mounting bracket (201), the pump casing (4) being fixedly connected to one side of the frame (1) close to the output end of the motor (2) through a second mounting bracket (401), one end of the pump shaft (5) close to the motor (2) being fixedly connected to the output end of the motor (2) through a coupling (3); On the side of the partition plate (7) away from the motor (2), a T-shaped limit groove ring (703) is provided, a T-shaped ring (704) being rotatably connected within the T-shaped limit groove ring (703), a transmission internal gear ring (705) being fixedly connected to the side of the T-shaped ring (704) away from the partition plate (7), a transmission external gear ring (708) being rotatably connected to the inner side of the pump shaft (5) close to the transmission internal gear ring (705) through a first ratchet wheel (707), the transmission external gear ring (708) being meshed with the transmission internal gear ring (705), and the sealing plate (706) being fixedly connected to the transmission internal gear ring (705).

2. A centrifugal water pump according to claim 1, characterized in that, A water inlet pipe (402) is fixedly connected to the side of the pump casing (4) away from the motor (2), a water outlet cavity (404) is provided within the wall of one side of the pump casing (4), a water outlet hole (405) communicating with the water outlet cavity (404) is provided on the side of each pump chamber close to the water outlet cavity (404), a solenoid valve is installed within the water outlet hole (405), and a water outlet pipe (403) communicating with the water outlet cavity (404) is connected to one end of the pump casing (4) close to the water inlet pipe (402).

3. The centrifugal water pump according to claim 2, characterized in that, A water diversion box (406) is slidably connected within the water outlet cavity (404), the water diversion box (406) being slidably adhered to the inner wall of the water outlet cavity (404), the water inlet of the water diversion box (406) facing the side of the water outlet hole (405), the water inlet of the water outlet pipe (403) being communicated with the water outlet of the water diversion box (406), and the water diversion box (406) being connected to the pump shaft (5) through a transmission assembly.

4. A centrifugal water pump according to claim 3, characterized in that, The transmission assembly includes a lead screw (407), a sleeve (408), a first gear (409), a second gear (10), and a third gear (11). The lead screw (407) is arranged in the water outlet cavity (404). One end of the lead screw (407) close to the water diversion box (406) is fixedly connected to the water diversion box (406). The end of the lead screw (407) far from the water diversion box (406) penetrates through the pump housing (4). The sleeve (408) is rotatably connected to one end of the pump housing (4) far from the water outlet pipe (403). The sleeve (408) is sleeved on the lead screw (407) and is threadedly connected to the lead screw (407). The first gear (409) is fixedly connected to the sleeve (408). The second gear (10) is connected to the pump shaft (5) close to the first gear (409) through a second ratchet (12). The third gear (11) is rotatably connected between the first gear (409) and the second gear (10). The third gear (11) meshes with the first gear (409) and the second gear (10).

5. A centrifugal water pump according to claim 2, characterized in that, The water inlet of the water inlet pipe (402) and the water outlet of the water outlet pipe (403) are respectively hermetically connected to the external water pipe through a sealing housing ring (6).

6. The centrifugal water pump according to claim 5, wherein, Conical collar rings (601) are fixedly connected to both sides of the sealing housing ring (6). Rotating rings (602) are respectively rotatably connected to the water inlet pipe (402), the water outlet pipe (403), and the external water pipe through threads.

7. The centrifugal water pump according to claim 5, characterized in that, Above the interior of the sealing housing ring (6) is provided a detection cavity. A floating plate (605) is hermetically and slidably connected in the detection cavity. A metal plate (606) is fixedly connected to the upper side of the floating plate (605). A buzzer (607) is fixedly connected to the upper end of the sealing housing ring (6) close to the detection cavity. The electrode head on the buzzer (607) extends into the detection cavity. A metal contact (608) is fixedly connected to the position of the metal plate (606) close to the electrode head.

8. A centrifugal water pump according to claim 1, characterized in that, The partition plate (7) and the pump shaft (5) are connected through a sealing shaft sleeve (702).

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