A multi-stage variable-frequency make-up water pump

Abstract

The present invention discloses a multi-stage variable-frequency make-up water pump, which relates to the technical field of make-up water pumps. The present invention includes a base, on the top of which a motor and a water outlet part are fixedly installed. On the left side of the water outlet part, two groups of support rods are fixedly installed, and an inlet part is fixedly installed on the support rods. A plurality of modular components are arranged between the inlet part and the water outlet part. By adopting the setting of the modular components, the present invention can realize any combination of the number of stages of the make-up water pump, and can adjust the number of stages of the make-up water pump according to the on-site environment, with a wide range of applications. Through the setting of the built-in temporary vortex fan inclined part and the indicating plug, when the impeller at the corresponding position is damaged, the flow rate in the modular component decreases, and the indicating plug will move towards the inside of the housing. Therefore, the position of the damaged impeller can be accurately judged through the indicating plug. Through the setting of the modular component and the support rod, the disassembly and maintenance of the damaged impeller can be quickly realized, and the maintenance efficiency is high.

Description

Technical Field

[0001] The present invention relates to the technical field of make-up water pumps, and particularly to a multi-stage variable-frequency make-up water pump. Background Art

[0002] The heating system is an important and indispensable part of modern buildings. Especially in cold regions, winter heating is particularly important. The heating system usually heats water through a boiler and transports the hot water to each room or area of the building through a pump. However, in traditional heating systems, the pump usually operates at a constant speed, which may lead to energy waste and low system operation efficiency. With the increasing demands for energy conservation and environmental protection, the technology of variable-frequency make-up water pumps for heating has emerged.

[0003] In the utility model patent with the publication number of CN207195205U, a double-shell radially split multi-stage centrifugal boiler emergency make-up water pump is disclosed, which is characterized in that the double-shell radially split multi-stage centrifugal boiler emergency make-up water pump includes: an inner core component, a cylinder component, a pump cover, a balance mechanism, a sealing box body, a sealing component and a bearing component.

[0004] The following technical problems exist in the actual use of this patent and the prior art:

[0005] 1. The existing multi-stage make-up water pumps are composed of multiple impellers connected in series, and the multiple impellers are installed on the same output shaft. The housing of the make-up water pump is also fixed, which results in a fixed number of stages for the make-up water pump and makes it impossible to adjust the number of stages of the make-up water pump later. This means that in some cases, the number of stages of the pump may be too many or too few, resulting in the system not being able to optimally match the actual working conditions. For example, at low flow requirements, too many stages will lead to high energy consumption; while at high flow requirements, insufficient stages may result in insufficient water flow or inability to reach the required pressure.

[0006] 2. Since multiple impellers are provided in the multi-stage make-up water pump, if one of the impellers is damaged, although it is possible to judge the damage of the impeller based on the flow rate and vibration of the pump, it is impossible to accurately find the damaged impeller, and the entire make-up water pump needs to be disassembled for inspection, resulting in low maintenance efficiency. Summary of the Invention

[0007] The purpose of the present invention is: to solve the above problems, the present invention provides a multi-stage variable-frequency make-up water pump.

[0008] The present invention specifically adopts the following technical solutions to achieve the above purpose:

[0009] A multi-stage variable-frequency make-up water pump includes a base, on the top of which a motor and a water outlet part are fixedly installed. Two groups of support rods are fixedly installed on the left side of the water outlet part, and a water inlet part is fixedly installed on the support rods. A plurality of modular components are arranged between the water inlet part and the water outlet part;

[0010] The modular component includes a housing that can be fixedly installed on a support rod. A guide impeller is fixedly installed inside the housing. A segmented bushing is inserted inside the guide impeller. An impeller is installed on the outer side of the segmented bushing. A spline shaft hole II is penetratingly opened inside the segmented bushing. A segmented shaft core is slidably connected inside the spline shaft hole II. One end of the segmented shaft core away from the spline shaft hole II is provided with a spline shaft head II. A top spring is arranged between the segmented shaft core and the inner wall of the spline shaft hole II. A conical driving part is arranged on the outer side of the segmented shaft core. Two sets of jacks are opened on the outer side of the segmented bushing. Two sets of indicating insertion rods are hermetically inserted on the outer side of the housing.

[0011] Further, an impeller sleeve is arranged at one end of the impeller close to the guide impeller. The impeller sleeve is sleeved on the outer side of the segmented bushing, and the guide impeller is sleeved on the outer side of the impeller sleeve. A positioning external thread is opened on the outer side of the impeller sleeve. A positioning ring is threadedly connected to the outer side of the positioning external thread. The guide impeller is located between the impeller and the positioning ring.

[0012] Further, a pressurizing chamber and a through hole are opened inside the housing. The guide impeller and the impeller are both located in the pressurizing chamber. A temporary vortex fan is inserted inside the through hole. The temporary vortex fan is sleeved on the outer side of the impeller sleeve. A connecting rotating ring is rotatably installed on one side of the temporary vortex fan close to the guide impeller. An inner tension spring is fixedly connected between the connecting rotating ring and the positioning ring. An inclined part is arranged on the outer side of the temporary vortex fan. The indicating insertion rod can press against the inclined part. An outer tension spring is arranged between the indicating insertion rod and the housing.

[0013] Further, it also includes a detection bracket. The detection bracket is located in front of the modular component. A plurality of laser distance sensors are fixedly installed on one side of the detection bracket close to the modular component. The laser distance sensors are arranged corresponding to the indicating insertion rods. A warning lamp is fixedly installed on the other side of the detection bracket. The laser distance sensors can control the on-off of the warning lamp through a controller.

[0014] Further, a transmission key groove is opened on the outer side of the impeller sleeve. A transmission sliding key is arranged on the inner wall of the temporary vortex fan. A limiting hole is opened on the outer side of the indicating insertion rod. A limiting bolt is threadedly connected to the outer side of the housing. When the limiting bolt is threadedly connected in the limiting hole, the indicating insertion rod extends inward beyond the temporary vortex fan, and at the same time, the transmission sliding key slides into the transmission key groove.

[0015] Further, a guide hole is opened on the inner wall of the segmented bushing. A clamping column is slidably connected inside the guide hole. A clamping spring is arranged between the clamping column and the inner wall of the guide hole. A clamping hole is opened on the outer side of the segmented shaft core. The clamping column can be inserted into the clamping hole. A friction sliding block is slidably connected to the inner wall of the jack. The friction sliding block is in transmission connection with the clamping column through a transmission rope.

[0016] Furthermore, a spline shaft hole one is provided inside the impeller, and a spline shaft head one is arranged on the outer side of the segmented shaft sleeve. The spline shaft head one can be inserted into the spline shaft hole one.

[0017] Furthermore, two groups of connecting claws are arranged on the outer sides of the housing and the water inlet part. A semi-circular connecting piece is fixedly installed at the bottom of the connecting claw. The semi-circular connecting piece and the connecting claw form a collar, and the collar is sleeved on the support rod. A locking thread is provided on the outer side of the support rod, and the locking thread is correspondingly arranged with the modular component. A locking nut is threadedly connected to the outer side of the locking thread.

[0018] Furthermore, a sliding rod is slidably connected to the left side of the base, and a support sleeve is arranged on the left side of the sliding rod. The support sleeve can be sleeved on the support rod.

[0019] Furthermore, a connecting shaft is rotatably installed inside the water outlet part. The connecting shaft is connected to the output end of the motor through a coupling. A spline shaft hole one is also provided at the end of the connecting shaft far from the motor.

[0020] The beneficial effects of the present invention are as follows:

[0021] 1. By adopting the setting of the modular component, the present invention can realize any combination of the number of makeup water pumps, and can adjust the number of makeup water pumps according to the on-site environment, with a wide range of applications.

[0022] 2. Through the setting of the built-in temporary vortex fan inclined part and the indicating plug rod, when the impeller at the corresponding position is damaged, the flow rate in the modular component decreases, and the indicating plug rod will move towards the inside of the housing. Therefore, the position of the damaged impeller can be accurately judged through the indicating plug rod. Then, through the setting of the modular component and the support rod, the disassembly and maintenance of the damaged impeller can be quickly realized, and the maintenance efficiency is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic diagram of the overall structure of the present invention Figure 1 ;

[0024] Figure 2 is a schematic diagram of the overall structure of the present invention Figure 2 ;

[0025] Figure 3 is a schematic diagram of the disassembly of the modular component of the present invention;

[0026] Figure 4 is the explosion of the modular component of the present invention Figure 1 ;

[0027] Figure 5 is the explosion of the modular component of the present invention Figure 2 ;

[0028] Figure 6It is a schematic diagram of the segmented bushing and segmented shaft core structure of the present invention;

[0029] Figure 7 It is a schematic diagram of the segmented bushing structure of the present invention;

[0030] Figure 8 It is a schematic diagram of the temporary vortex fan structure of the present invention;

[0031] Figure 9 It is a schematic diagram of the sectional structure of the modular component of the present invention;

[0032] Figure 10 It is the present invention Figure 9 The enlarged schematic diagram of part A in.

[0033] Reference numerals: 1, base; 11, slide bar; 12, support sleeve; 2, motor; 3, water outlet part; 31, support rod; 32, locking thread; 33, locking nut; 4, water inlet part; 5, outer shell; 51, connecting claw; 52, semi-circular connecting part; 53, guide impeller; 54, impeller; 541, impeller sleeve; 542, spline shaft hole one; 543, positioning external thread; 544, transmission keyway; 55, segmented bushing; 551, spline shaft hole two; 552, spline shaft head one; 553, jack; 554, clamping column; 555, friction slider; 56, segmented shaft core; 561, spline shaft head two; 562, conical driving part; 563, clamping hole; 57, indicating insertion rod; 571, outer tension spring; 572, limiting hole; 573, limiting bolt; 58, temporary vortex fan; 581, inclined part; 582, transmission sliding key; 583, connecting rotating ring; 584, inner tension spring; 585, positioning ring; 59, top spring; 6, detection bracket; 61, laser distance sensor; 62, warning lamp. Specific embodiments

[0034] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0035] Embodiment 1, as Figures 1 - 10 shown, a multi-stage frequency conversion make-up water pump includes a base 1. A motor 2 and a water outlet part 3 are fixedly installed on the top of the base 1. Two groups of support rods 31 are fixedly installed on the left side of the water outlet part 3. A water inlet part 4 is fixedly installed on the support rods 31. Multiple modular components are arranged between the water inlet part 4 and the water outlet part 3;

[0036] The modular component includes a housing 5 which can be fixedly installed on the support rod 31. A guide impeller 53 is fixedly installed inside the housing 5. A segmented bushing 55 is inserted inside the guide impeller 53. An impeller 54 is installed on the outer side of the segmented bushing 55. A spline shaft hole two 551 is penetrated and opened inside the segmented bushing 55. A segmented shaft core 56 is slidably connected inside the spline shaft hole two 551. One end of the segmented shaft core 56 away from the spline shaft hole two 551 is provided with a spline shaft head two 561. A top spring 59 is arranged between the segmented shaft core 56 and the inner wall of the spline shaft hole two 551. A conical driving part 562 is arranged on the outer side of the segmented shaft core 56. Two groups of jacks 553 are opened on the outer side of the segmented bushing 55. Two groups of indicating insertion rods 57 are hermetically inserted on the outer side of the housing 5.

[0037] Further, a spline shaft hole one 542 is opened inside the impeller 54. A spline shaft head one 552 is arranged on the outer side of the segmented bushing 55. The spline shaft head one 552 can be inserted into the spline shaft hole one 542.

[0038] Furthermore, a connecting shaft is rotatably installed inside the water outlet part 3. The connecting shaft is connected with the output end of the motor 2 through a coupling. A spline shaft hole one 542 is also opened at one end of the connecting shaft away from the motor 2.

[0039] During assembly, first install the modular components on the left side of the water outlet part 3, then install multiple modular components in sequence, and finally install the water inlet part 4. The specific installation steps are as follows: Fix the guide impeller 53 in the housing 5, then pass the segmented shaft sleeve 55 through the guide impeller 53, then insert two groups of indicating plug rods 57 into the housing 5, and make the two groups of indicating plug rods 57 inserted into the two groups of jacks 553. The two groups of indicating plug rods 57 position and clamp the segmented shaft sleeve 55. As the indicating plug rods 57 continue to be inserted, the indicating plug rods 57 push the segmented shaft core 56 to slide into the segmented shaft sleeve 55 through the conical driving part 562, and the spline shaft head two 561 is received into the segmented shaft sleeve 55. Then install the impeller 54 on the segmented shaft sleeve 55 through the spline shaft hole one 542 and the spline shaft head one 552. Subsequently, install the housing 5 on the support rod 31 in sequence. The adjacent housings 5 are closely attached to achieve sealing, and the two ends of the adjacent segmented shaft sleeves 55 are mutually attached. After installation, pull the indicating plug rod 57 outwards. The indicating plug rod 57 first moves away from the conical driving part 562, and the top spring 59 pushes the segmented shaft core 56 to slide. The segmented shaft core 56 drives the spline shaft head two 561 to be inserted into the spline shaft hole two 551 in the adjacent segmented shaft sleeve 55 on the right. The spline shaft head two 561 straddles between two adjacent groups of segmented shaft sleeves 55, realizing the mutual transmission connection of the adjacent segmented shaft sleeves 55. It should be noted that the rightmost spline shaft head two 561 straddles between the segmented shaft sleeve 55 and the connecting shaft. Therefore, the transmission connection of the segmented shaft sleeve 55 is completed, and the indicating plug rod 57 is separated from the jack 553 and received in the housing 5, which will not affect the normal operation of the make-up water pump. Finally, install the water inlet part 4 on the left side of the leftmost modular component to complete the installation of the multi-stage make-up water pump.

[0040] During disassembly, insert the indicating plug rod 57 into the housing 5, and at the same time use a tool to drive the connecting shaft to rotate. The connecting shaft drives the segmented shaft sleeve 55 to rotate synchronously. When the jack 553 rotates to the position corresponding to the indicating plug rod 57, insert the two groups of indicating plug rods 57 into the two groups of jacks 553 respectively. The indicating plug rods 57 clamp the segmented shaft sleeve 55. As the indicating plug rods 57 continue to be inserted, the indicating plug rods 57 push the segmented shaft core 56 to slide into the segmented shaft sleeve 55 through the conical driving part 562, and the spline shaft head two 561 is received into the segmented shaft sleeve 55. The spline shaft head two 561 in this modular component moves away from the segmented shaft sleeve 55 on the right. At the same time, it is necessary to control the spline shaft head two 561 in the left modular component to move away from this segmented shaft sleeve 55. Therefore, this modular component can be directly disassembled from the water pump, and disassembly and maintenance can be selectively carried out without overall disassembly, and the maintenance efficiency is high.

[0041] Therefore, the present invention adopts a modular design, which can realize any combination of the number of stages of the make-up water pump, can adjust the number of stages of the make-up water pump according to the on-site environment, has a wide range of applications, and can be repaired and replaced targeted, with high maintenance efficiency.

[0042] Embodiment 2, on the basis of the above embodiment, further includes that one end of the impeller 54 close to the guide impeller 53 is provided with an impeller sleeve 541. The impeller sleeve 541 is sleeved outside the segmented shaft sleeve 55, and the guide impeller 53 is sleeved outside the impeller sleeve 541. A positioning external thread 543 is provided on the outside of the impeller sleeve 541, and a positioning ring 585 is threadedly connected to the outside of the positioning external thread 543. The guide impeller 53 is located between the impeller 54 and the positioning ring 585.

[0043] Through this design, the axial position of the impeller 54 can be limited, and the operation is more stable.

[0044] Embodiment 3, on the basis of the above embodiment, further includes that a pressurization chamber and a through hole are provided inside the housing 5. The guide impeller 53 and the impeller 54 are both located in the pressurization chamber. A temporary vortex fan 58 is inserted into the through hole. The temporary vortex fan 58 is sleeved outside the impeller sleeve 541. A connecting rotating ring 583 is rotatably installed on one side of the temporary vortex fan 58 close to the guide impeller 53. An inner tension spring 584 is fixedly connected between the connecting rotating ring 583 and the positioning ring 585. An inclined portion 581 is provided on the outside of the temporary vortex fan 58. The indicating plug 57 can press on the inclined portion 581. An outer tension spring 571 is provided between the indicating plug 57 and the housing 5.

[0045] Since there are a large number of impellers 54 in the make-up water pump, when one group of impellers 54 is damaged, it is impossible to quickly find the position of the corresponding impeller 54. Therefore, through the setting of the temporary vortex fan 58, when it is used normally, the flow rate and pressure passing through the through hole meet the requirements. Therefore, the water flow will push the temporary vortex fan 58 to slide into the through hole. The temporary vortex fan 58 pushes the indicating plug 57 to slide outward of the housing 5 through the inclined portion 581. When the impeller 54 in this modular component is damaged, the internal flow rate of the modular component located on the left side of this modular component meets the requirements, and the internal flow rate and pressure of this modular component and the modular components on its right side will both decrease. Therefore, the inner tension spring 584 will pull the temporary vortex fan 58 close to the impeller 54, and the indicating plug 57 will move inward of the housing 5 under the action of the outer tension spring 571. Therefore, by observing the external leakage length of the indicating plug 57, the position of the damaged impeller 54 can be judged. It should be noted that by only observing whether the external leakage length of the right indicating plug 57 is shorter, the damage condition of the right impeller 54 can also be continuously judged. The main logic is that the flow rate on the right side of the damaged impeller 54 will decrease synchronously, but there will be a height difference with the adjacent one on the left side. Therefore, by judging the stepped position of the indicating plug 57, the damage conditions of multiple impellers 54 can be judged.

[0046] Embodiment 4, on the basis of the above embodiment, further includes a detection bracket 6, the detection bracket 6 is located on the front of the modular component, a plurality of groups of laser distance sensors 61 are fixedly installed on one side of the detection bracket 6 close to the modular component, the laser distance sensors 61 are arranged corresponding to the indicator rod 57, and a prompt light 62 is fixedly installed on the other side of the detection bracket 6, and the laser distance sensor 61 can control the power on and off of the prompt light 62 through a controller.

[0047] The laser distance sensor 61 detects the leaked length of the indicating rod 57. When the leaked length is too short, the laser distance sensor 61 can control the warning light 62 to be powered on and light up through the controller, so that the damage of the impeller 54 can be discovered more timely.

[0048] Embodiment 5, on the basis of the above embodiment, further includes: a transmission key groove 544 is opened on the outer side of the impeller sleeve 541, a transmission sliding key 582 is provided on the inner wall of the temporary turbofan 58, a limiting hole 572 is opened on the outer side of the indicating rod 57, and a limiting bolt 573 is threadedly connected to the outer side of the outer casing 5. When the limiting bolt 573 is threadedly connected in the limiting hole 572, the indicating rod 57 exceeds the temporary turbofan 58 inwardly, and the transmission sliding key 582 slides into the transmission key groove 544.

[0049] When the impeller 54 is damaged but temporary water replenishment is still needed, the indicating rod 57 is pushed into the inside of the casing 5, and the indicating rod 57 pushes the temporary turbofan 58 toward the impeller 54 through the inclined portion 581. When the limiting hole 572 moves to the position of the limiting bolt 573, the limiting bolt 573 is threadedly connected to the limiting hole 572. At this time, the indicating rod 57 exceeds the temporary turbofan 58 inward, and the transmission sliding key 582 slides into the transmission key groove 544. At this time, the temporary turbofan 58 can rotate synchronously with the impeller 54. The temporary turbofan 58 can increase the flow of the water replenishment pump, which can make the water replenishment pump run urgently for a period of time and can adapt to more complex environments.

[0050] Embodiment 6, on the basis of the above embodiments, further includes: a guide hole is opened on the inner wall of the segmented sleeve 55, a clamping column 554 is slidably connected inside the guide hole, a retaining spring is arranged between the clamping column 554 and the inner wall of the guide hole, a clamping hole 563 is opened on the outer side of the segmented shaft core 56, the clamping column 554 can be inserted into the clamping hole 563, a friction slider 555 is slidably connected to the inner wall of the insertion hole 553, and the friction slider 555 is transmission-connected to the clamping column 554 through a transmission rope.

[0051] Since the segmented shaft core 56 is connected by the elastic force of the top spring 59, instability may easily occur during operation. Therefore, through the arrangement of this embodiment, when the spline shaft head 561 on the segmented shaft core 56 is connected, the clamping column 554 is inserted into the clamping hole 563 under the action of the clamping spring, and the clamping column 554 is distributed radially along the segmented shaft core 56, so that the segmented shaft core 56 can be provided with a stable axial limiting force.

[0052] When disassembling, insert the indicating plug rod 57 into the housing 5. At the same time, use a tool to drive the connecting shaft to rotate. The connecting shaft drives the segmented shaft sleeve 55 to rotate synchronously. When the jack 553 rotates to a position corresponding to the indicating plug rod 57, insert the two groups of indicating plug rods 57 into the two groups of jacks 553 respectively. The indicating plug rod 57 drives the friction slider 555 to slide into the segmented shaft sleeve 55 by friction. The friction slider 555 drives the clamping column 554 away from the clamping hole 563 through the transmission rope. As the indicating plug rod 57 continues to be inserted, the tapered driving portion 562 pushes the segmented shaft core 56 to slide into the segmented shaft sleeve 55, and the spline shaft head two 561 is received into the segmented shaft sleeve 55. The spline shaft head two 561 in this modular component is away from the segmented shaft sleeve 55 on the right side. At the same time, it is necessary to control the spline shaft head two 561 in the left modular component to be away from this segmented shaft sleeve 55. Therefore, this modular component can be directly disassembled from the water pump.

[0053] Embodiment Seven: On the basis of the above embodiment, it further includes that two groups of connecting claws 51 are arranged on the outer sides of the housing 5 and the water inlet part 4. A semi-circular connecting piece 52 is fixedly installed at the bottom of the connecting claw 51. The semi-circular connecting piece 52 and the connecting claw 51 form a collar, and the collar is sleeved on the support rod 31. A locking thread 32 is provided on the outer side of the support rod 31, and the locking thread 32 is arranged corresponding to the modular component. A locking nut 33 is threadedly connected to the outer side of the locking thread 32.

[0054] By pressing the connecting claw 51 on the support rod 31, and then using bolts to install the semi-circular connecting piece 52 on the connecting claw 51. At this time, the housing 5 is sleeved on the support rod 31 through the connecting claw 51 and the semi-circular connecting piece 52. The housing 5 can slide along the support rod 31. After the rightmost housing 5 presses on the water outlet part 3, a pressing force is given through the locking nut 33 to ensure the installation sealing performance.

[0055] Embodiment Eight: On the basis of the above embodiment, it further includes that a sliding rod 11 is slidably connected to the left side of the base 1. A support sleeve 12 is arranged on the left side of the sliding rod 11, and the support sleeve 12 can be sleeved on the support rod 31.

[0056] When disassembling the whole, pull the sliding rod 11 to slide. The sliding rod 11 drives the support sleeve 12 away from the support rod 31, which will not affect the disassembly of the locking nut 33 on the support rod 31. When installing, the support sleeve 12 is sleeved on the support rod 31 to provide a supporting force for the left end of the support rod 31.

[0057] The foregoing description of the disclosed embodiments enables those skilled in the art to practice or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A multi-stage variable-frequency make-up water pump, including a base (1), characterized in that, The top of the base (1) is fixedly installed with a motor (2) and a water outlet part (3). Two groups of support rods (31) are fixedly installed on the left side of the water outlet part (3). An inlet part (4) is fixedly installed on the support rods (31). A plurality of modular components are arranged between the inlet part (4) and the water outlet part (3). The modular component includes a housing (5). The housing (5) can be fixedly installed on the support rod (31). An impeller guide (53) is fixedly installed inside the housing (5). A segmented bushing (55) is inserted inside the impeller guide (53). An impeller (54) is installed on the outer side of the segmented bushing (55). A spline shaft hole two (551) is formed through the inside of the segmented bushing (55). A segmented shaft core (56) is slidably connected inside the spline shaft hole two (551). One end of the segmented shaft core (56) away from the spline shaft hole two (551) is provided with a spline shaft head two (561). A top spring (59) is arranged between the segmented shaft core (56) and the inner wall of the spline shaft hole two (551). A conical driving part (562) is arranged on the outer side of the segmented shaft core (56). Two jacks (553) are formed on the outer side of the segmented bushing (55). Two indicating plug rods (57) are hermetically inserted on the outer side of the housing (5). One end of the impeller (54) close to the impeller guide (53) is provided with an impeller sleeve (541). The impeller sleeve (541) is sleeved on the outer side of the segmented bushing (55), and the impeller guide (53) is sleeved on the outer side of the impeller sleeve (541). A positioning external thread (543) is formed on the outer side of the impeller sleeve (541). A positioning ring (585) is threadedly connected to the outer side of the positioning external thread (543). The impeller guide (53) is located between the impeller (54) and the positioning ring (585). A pressurizing cavity and a through hole are formed inside the housing (5). The impeller guide (53) and the impeller (54) are both located in the pressurizing cavity. A temporary vortex fan (58) is inserted inside the through hole. The temporary vortex fan (58) is sleeved on the outer side of the impeller sleeve (541). A connecting rotating ring (583) is rotatably installed on one side of the temporary vortex fan (58) close to the impeller guide (53). An inner tension spring (584) is fixedly connected between the connecting rotating ring (583) and the positioning ring (585). An inclined part (581) is arranged on the outer side of the temporary vortex fan (58). The indicating plug rod (57) can press on the inclined part (581). An outer tension spring (571) is arranged between the indicating plug rod (57) and the housing (5).

2. The multistage variable-frequency makeup water pump according to claim 1, wherein It further includes a detection bracket (6). The detection bracket (6) is located in front of the modular component. A plurality of laser distance sensors (61) are fixedly installed on one side of the detection bracket (6) close to the modular component. The laser distance sensors (61) are arranged corresponding to the indicating plug rods (57). A warning lamp (62) is fixedly installed on the other side of the detection bracket (6). The laser distance sensors (61) can control the on-off of the warning lamp (62) through a controller.

3. The multi-stage variable-frequency make-up water pump according to claim 2, characterized in that, A transmission keyway (544) is provided on the outer side of the impeller sleeve (541). A transmission sliding key (582) is provided on the inner wall of the temporary vortex fan (58). A limiting hole (572) is provided on the outer side of the indicating insertion rod (57). A limiting bolt (573) is threadedly connected to the outer side of the housing (5). When the limiting bolt (573) is threadedly connected in the limiting hole (572), the indicating insertion rod (57) extends inward beyond the temporary vortex fan (58), and at the same time, the transmission sliding key (582) slides into the transmission keyway (544).

4. The multi-stage variable frequency make-up water pump according to claim 3, characterized in that, A guide hole is provided on the inner wall of the segmented shaft sleeve (55). A clamping column (554) is slidably connected inside the guide hole. A clamping spring is provided between the clamping column (554) and the inner wall of the guide hole. A clamping hole (563) is provided on the outer side of the segmented shaft core (56). The clamping column (554) can be inserted into the clamping hole (563). A friction slider (555) is slidably connected to the inner wall of the insertion hole (553). The friction slider (555) is drivingly connected to the clamping column (554) through a transmission rope.

5. The multi-stage variable frequency make-up water pump according to claim 4, characterized in that, A spline shaft hole one (542) is provided inside the impeller (54). A spline shaft head one (552) is provided on the outer side of the segmented shaft sleeve (55). The spline shaft head one (552) can be inserted into the spline shaft hole one (542).

6. The multi-stage variable-frequency make-up water pump according to claim 5, characterized in that Two sets of connecting claws (51) are provided on the outer sides of the housing (5) and the water inlet part (4). A semi-circular connecting part (52) is fixedly installed at the bottom of the connecting claw (51). The semi-circular connecting part (52) and the connecting claw (51) form a collar, and the collar is sleeved on the support rod (31). A locking thread (32) is provided on the outer side of the support rod (31). The locking thread (32) is correspondingly arranged with the modular component. A locking nut (33) is threadedly connected to the outer side of the locking thread (32).

7. A multi-stage variable frequency make-up water pump according to claim 6, characterized in that, A sliding rod (11) is slidably connected to the left side of the base (1). A support sleeve (12) is provided on the left side of the sliding rod (11). The support sleeve (12) can be sleeved on the support rod (31).

8. A multi-stage variable frequency make-up water pump according to claim 7, characterized in that, A connecting shaft is rotatably installed inside the water outlet part (3). The connecting shaft is connected to the output end of the motor (2) through a coupling. A spline shaft hole one (542) is also provided at the end of the connecting shaft far from the motor (2).

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