Permanent magnet axial flow pump for municipal engineering

Abstract

The application discloses a kind of municipal engineering with permanent-magnetic axial flow pump, including permanent-magnetic axial flow pump, the upper side of the inside of permanent-magnetic axial flow pump is provided with permanent-magnet motor, the output end of permanent-magnet motor is provided with driving shaft by shaft coupling, the upper side of the inside of permanent-magnetic axial flow pump is provided with four support legs that are annular equidistant distribution, further include first transmission cavity, it is opened in the inside of the support leg, the upper side of the inside of first transmission cavity is rotatably provided with first transmission rod, the middle position of the inside of first transmission cavity is provided with second transmission rod.The municipal engineering with permanent-magnetic axial flow pump effectively prevents these sundries from entering the inside of permanent-magnetic axial flow pump, avoids the entanglement and jam of impeller and other components in pump, greatly improves the working efficiency and service life of permanent-magnetic axial flow pump, and does not need to use additional power source, by starting permanent-magnetic axial flow pump can be synchronized, reduces use cost.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of permanent-magnetic axial flow pumps, in particular to a permanent-magnetic axial flow pump for municipal engineering. BACKGROUND

[0002] Municipal engineering refers to various public infrastructure constructions matched with urban life, which jointly constitute the cornerstone of normal operation of a city, and the municipal engineering includes but is not limited to urban roads, bridges, water supply and drainage systems, sewage treatment facilities, urban flood control projects, landscaping, street lighting and environmental sanitation and other urban public utility projects, the construction and maintenance of the projects are directly related to the life quality of urban residents and are important components of urban development, in the water supply and drainage system of the municipal engineering, the permanent-magnetic axial flow pump is widely applied to the fields of water supply and rainwater drainage, can quickly supplement water pressure, meet the large water demand of residents and enterprises, and can quickly drain accumulated water during rainwater drainage, so as to prevent urban waterlogging, in addition, the permanent-magnetic axial flow pump is also applicable to flood fighting, drainage and fire fighting and other occasions, and provides a powerful guarantee for the safety and stability of a city.

[0003] For example, the Chinese patent with the announcement number CN207004852U, a submersible axial flow pump, the submersible axial flow pump, including motor shell, pump shaft, water guide cone, impeller seat, the pump shaft is axially installed in the motor shell, the pump shaft end is connected with the impeller seat, the motor shell and the impeller seat are fixed with the water guide cone, characterized in that, the end of the water guide cone is provided with a water baffle, the middle of the water baffle is in contact with the pump shaft, the lower end of the water baffle is provided with a mechanical seal matched with the pump shaft, and one end of the mechanical seal is sleeved outside one end of the impeller seat.

[0004] Although the sealing structure of the submersible axial flow pump is simple and the sealing effect is good, in the actual application scene of the municipal engineering, especially in the sewage treatment, rainwater drainage or water diversion engineering of rivers and lakes, flocculent impurities such as leaves, plastic bags and waterweeds are likely to enter the pump body, if the impurities cannot be effectively intercepted in time, the water inlet and flow channel of the pump are blocked, the hydraulic performance of the pump is affected, the impeller and the seal of the pump are abraded, and the service life of the pump is shortened, therefore, the existing demand cannot be met, and the permanent-magnetic axial flow pump for municipal engineering is proposed. SUMMARY

[0005] The application aims to provide a permanent-magnetic axial flow pump for municipal engineering, so as to solve the problem that the pump lacks interception of flocculent impurities such as plastic bags and waterweeds, and is easy to be blocked and affect the hydraulic performance.

[0006] In order to achieve the above object, the present application provides the following technical scheme: A municipal engineering permanent magnet axial flow pump, comprising a permanent magnet axial flow pump, a permanent magnet motor is arranged on the upper side of the inside of the permanent magnet axial flow pump, a drive shaft is arranged on the output end of the permanent magnet motor through a shaft coupling, four support legs are arranged on the upper side of the inside of the permanent magnet axial flow pump, and the support legs are arranged in a ring shape and equidistantly distributed.

[0007] Further comprising a first transmission cavity, which is arranged in the inside of the support leg, first transmission rods are rotatably arranged on the upper side of the inside of the first transmission cavity, second transmission rods are arranged at the middle position of the inside of the first transmission cavity, third transmission rods are rotatably arranged on the lower side of the inside of the first transmission cavity, and one end of the third transmission rod extends to the outside of the first transmission cavity.

[0008] Further comprising a replacement seat, which is arranged at the outside of the first transmission cavity of the third transmission rod, and the replacement seat is fixedly connected with the third transmission rod, a rotating rod is arranged in the inside of the replacement seat, the rotating rod is slidably matched with the replacement seat, one end of the rotating rod extends to the outside of the replacement seat, four groups of winding rods are welded on the outer wall of one end of the rotating rod outside the replacement seat, and each group of winding rods is equidistantly welded with five winding rods, second transmission cavities are arranged on the upper and lower sides of the inside of the replacement seat, first moving blocks are arranged in the inside of the second transmission cavities, second moving blocks are arranged on one side of the first moving blocks, first guide rods are welded in the inside of the second transmission cavities, second guide rods are welded on one side of the inside of the second transmission cavities, the first moving blocks and the second moving blocks are connected through connecting blocks, the connecting blocks are penetrated by the first guide rods and the second guide rods, and the connecting blocks are slidably matched with the first guide rods and the second guide rods.

[0009] Further comprising a support block, which is arranged at the lower end of the support leg, three extension blocks are arranged in the inside of the support block, and the extension blocks are connected with the support block through damping devices.

[0010] Preferably, the upper side of the outer wall of the drive shaft is provided with a first bevel gear, one end of the first transmission rod is provided with a second bevel gear, and the second bevel gear is meshingly connected with the first bevel gear.

[0011] Preferably, the outer wall of the first transmission rod and the upper end of the second transmission rod are provided with third bevel gears on one side, and the third bevel gears are meshingly connected.

[0012] Preferably, the lower end of the second transmission rod and the outer wall of one end of the third transmission rod inside the first transmission cavity are provided with fourth bevel gears, and the fourth bevel gears are meshingly connected.

[0013] Preferably, the first guide rod is sleeved with a first reset spring on one side, one end of the first reset spring is connected with the first moving block, and the other end of the first reset spring is connected with the second transmission cavity.

[0014] Preferably, the second guide rod is sleeved with a second reset spring on one side, one end of the second reset spring is connected with the connecting block, and the other end of the second reset spring is connected with the second transmission cavity.

[0015] Preferably, the inner side of the replacement seat is provided with an annular pull block, the first moving block is adhesively fixed with a connecting rod at the middle position of the inner side, one end of the connecting rod penetrates and extends to the outside of the second transmission cavity, and the other end of the connecting rod located outside the second transmission cavity is adhesively fixed with the annular pull block.

[0016] Preferably, the upper and lower sides of one end of the rotating rod located inside the replacement seat are provided with a limiting groove, one end of the second moving block is adhesively fixed with a limiting block, one end of the limiting block penetrates and extends to the outside of the second transmission cavity, and the other end of the limiting block located outside the second transmission cavity is matched with the limiting groove.

[0017] Preferably, the first transmission rod is provided with two first bearings on the outside, the outer wall of the first bearing is connected with the first transmission cavity, and the inner wall of the first bearing is connected with the outer wall of the first transmission rod.

[0018] Preferably, the second transmission rod is provided with two second bearings on the outside, the outer wall of the second bearing is connected with the first transmission cavity, and the inner wall of the second bearing is connected with the outer wall of the second transmission rod.

[0019] Compared with the prior art, the present application has the following beneficial effects:

[0020] 1. The application is characterized in that four supporting legs are arranged on the upper side of the outer wall of the permanent magnet axial flow pump, transmission cavities are arranged in the supporting legs, when the permanent magnet motor is started, the driving shaft drives the impeller to rotate, the first transmission rod is synchronously rotated through the meshing connection of the first and second bevel gears, the second transmission rod is synchronously rotated with the first transmission rod through the meshing transmission of the third bevel gear, the third transmission rod is synchronously rotated with the second transmission rod through the meshing connection of the fourth bevel gear, the third transmission rod drives the replacement seat to synchronously rotate with the winding rod, when the flocculent impurities enter the permanent magnet axial flow pump, the flocculent impurities are wound through the rotating winding rod, and the flocculent impurities are attached to the winding rod after being wound, thereby effectively preventing the flocculent impurities from entering the permanent magnet axial flow pump, avoiding winding and blocking of the impeller and other components in the pump, greatly improving the working efficiency and service life of the permanent magnet axial flow pump, and without using an additional power source, the rotation is synchronously performed through starting the permanent magnet axial flow pump, and the use cost is reduced.

[0021] 2. The application is characterized in that the replacement seat is arranged at one end of the third transmission rod, after being used for a period of time, the flocculent impurities are wound and attached to the winding rod, at this time, the first moving block is synchronously moved through pulling the annular pull block, the movement of the first moving block releases the extrusion of the second moving block, thereby the limiting block is moved out of the inside of the limiting slot through the elastic action of the second return spring, the operator moves the rotating rod out of the inside of the replacement seat through pulling the rotating rod, thereby the winding rod can be moved out of the lower end of the permanent magnet axial flow pump with small space, the flocculent impurities on the winding rod are cleaned, after cleaning, the annular pull block is pulled again, the limiting slot is moved into the inside of the second transmission cavity, the rotating rod is moved into the inside of the replacement seat, and the annular pull block is released, the first moving block extrudes the second moving block under the elastic action of the first return spring, the second moving block drives the limiting block to be moved into the inside of the upper and lower limiting slots of the rotating rod again, thereby the rotating rod is fixed, the rotating rod is conveniently and quickly disassembled and assembled, the winding rod is cleaned, the cleaning and maintenance work process is simplified, the dependence on professional tools is reduced, the operator can quickly and effectively deal with the flocculent impurities on the winding rod, without long-time shutdown or complex disassembly steps, and the continuous and efficient operation of the permanent magnet axial flow pump is ensured.

[0022] 3. The present invention provides an extension block inside the support block through a damping shaft, and an anti-slip pad is adhered and fixed to the lower end surface of the extension block. When the permanent magnet axial flow pump is placed in use, the support block at the lower end of the support leg can support the permanent magnet axial flow pump. At the same time, the extension block can be rotated through the damping shaft so that the lower end of the extension block contacts the placement surface, increasing the contact area. The damping shaft allows the extension block to freely adjust its angle within a certain range to adapt to different support requirements, but at the same time provides sufficient resistance through the built-in damping mechanism to prevent the extension block from rotating or shifting arbitrarily when not subjected to external force, thereby enhancing the stability and firmness of the permanent magnet axial flow pump when placed, effectively preventing the pump body from being displaced or tilted due to vibration during operation, and ensuring its long-term operation reliability and safety. In particular, when the permanent magnet axial flow pump is placed on an uneven or sloped ground, by adjusting the angle of the extension block, its adaptability can be significantly improved, ensuring that the pump body always remains in a horizontal state, and optimizing the working efficiency of the permanent magnet axial flow pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0024] Figure 2 It is a front view schematic diagram of the internal structure of the present invention;

[0025] Figure 3 For the present invention Figure 1 A partial enlarged view of area A in the middle;

[0026] Figure 4 For the present invention Figure 2 A partial enlarged view of area B in the middle;

[0027] Figure 5 For the present invention Figure 2 A partial enlarged view of the middle C area;

[0028] Figure 6 For the present invention Figure 2 A partial enlarged view of the D area in the middle.

[0029] In the figure: 1, permanent magnet axial flow pump; 2, permanent magnet motor; 3, drive shaft; 4, first transmission cavity; 5, first bevel gear; 6, second bevel gear; 7, first transmission rod; 8, first bearing; 9, third bevel gear; 10, second transmission rod; 11, second bearing; 12, fourth bevel gear; 13, third transmission rod; 14, replacement seat; 15, second transmission cavity; 16, first moving block; 17, second moving block; 18, first guide rod; 19, first return spring; 20, second guide rod; 21, second return spring; 22, connecting block; 23, annular pull block; 24, connecting rod; 25, limiting block; 26, limiting groove; 27, rotating rod; 28, winding rod; 29, support leg; 30, support block; 31, extension block. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments.

[0031] Please refer to Figures 1-6 An embodiment provided by the present application: a permanent magnet axial flow pump for municipal engineering, comprising a permanent magnet axial flow pump 1, a permanent magnet motor 2 arranged on the upper side inside the permanent magnet axial flow pump 1, a drive shaft 3 arranged on the output end of the permanent magnet motor 2 through a shaft coupling, and four support legs 29 arranged on the upper side inside the permanent magnet axial flow pump 1 in a ring shape and equidistantly distributed.

[0032] Further comprising a first transmission cavity 4, which is arranged inside the support leg 29, a first transmission rod 7 rotatably arranged on the upper side inside the first transmission cavity 4, a second transmission rod 10 arranged at the middle position inside the first transmission cavity 4, a third transmission rod 13 rotatably arranged on the lower side inside the first transmission cavity 4, and one end of the third transmission rod 13 extending to the outside of the first transmission cavity 4.

[0033] Further comprising a replacement seat 14, which is arranged outside the first transmission cavity 4 where the third transmission rod 13 is located, and the replacement seat 14 is fixedly connected with the third transmission rod 13, the inside of the replacement seat 14 is provided with rotating rods 27, the rotating rods 27 are all in sliding fit with the replacement seat 14, and one end of the rotating rod 27 extends to the outside of the replacement seat 14, the outer wall of the one end of the rotating rod 27 located outside the replacement seat 14 is welded with four groups of winding rods 28 which are annular and equidistantly distributed, and each group of winding rods 28 is equidistantly welded with five winding rods, the upper and lower sides of the inside of the replacement seat 14 are both provided with second transmission cavities 15, the inside of the second transmission cavity 15 is provided with first moving blocks 16, one side of the first moving block 16 is provided with a second moving block 17, the inside of the second transmission cavity 15 is welded with a first guide rod 18, one side of the inside of the second transmission cavity 15 is welded with a second guide rod 20, the first moving block 16 and the first guide rod 18 and the second moving block 17 and the second guide rod 20 are all connected through connecting blocks 22, the connecting blocks 22 are all penetrated by the first guide rod 18 and the second guide rod 20, and the connecting blocks 22 are all in sliding fit with the first guide rod 18 and the second guide rod 20;

[0034] Further comprising a support block 30, which is arranged at the lower end of the support leg 29, the inside of the support block 30 is provided with three extension blocks 31, and the extension blocks 31 are all connected with the support block 30 through damping devices.

[0035] In use, the permanent magnet motor 2 drives the impeller to rotate to suck in the water flow, and at the same time drives the shaft 3 to rotate to drive the first bevel gear 5 to rotate, and then drives the second bevel gear 6, the first transmission rod 7, the third bevel gear 9, the second transmission rod 10 and the fourth bevel gear 12 through meshing transmission, and finally drives the third transmission rod 13 and the rotating rod 27 to rotate, so that the winding rod 28 rotates to wind the flocculent impurities, preventing the flocculent impurities from entering the pump to cause blockage, and when cleaning, the annular pull block 23 is pulled to drive the first moving block 16 to move through the connecting rod 24, the first return spring 19 is compressed and the limiting of the second moving block 17 is released, then under the action of the second return spring 21, the limiting block 25 moves out of the limiting groove 26 to release the limiting of the rotating rod 27, so that the rotating rod 27 and the winding rod 28 can be easily pulled out for cleaning.

[0036] Please refer to Figure 4 The upper side of the outer wall of the drive shaft 3 is provided with the first bevel gear 5, one end of the first transmission rod 7 is provided with the second bevel gear 6, and the second bevel gear 6 is in meshing connection with the first bevel gear 5, through the meshing transmission of the second bevel gear 6 and the first bevel gear 5, the rotating power of the drive shaft 3 can be efficiently transmitted to the first transmission rod 7, and at the same time the effect of speed reduction and torque increase is realized, so that the subsequent transmission is more stable and powerful.

[0037] Please refer to Figure 2The outer wall of the first transmission rod 7 and the upper end of the second transmission rod 10 are both provided with a third bevel gear 9, and the third bevel gears 9 are in meshing connection, through the meshing connection between the third bevel gears 9, the change of transmission direction and the further transmission of power are realized, so that the second transmission rod 10 can rotate synchronously and stably, and power support is provided for the subsequent transmission system.

[0038] Please refer to Figure 5 The lower end of the second transmission rod 10 and the outer wall of the first end inside the first transmission cavity 4 of the third transmission rod 13 are both provided with a fourth bevel gear 12, and the fourth bevel gears 12 are in meshing connection, through the meshing transmission of the fourth bevel gears 12, the rotating power of the second transmission rod 10 can be transmitted to the third transmission rod 13, the continuity and stability of the transmission system are realized, and the power transmission is more efficient.

[0039] Please refer to Figure 6 The outer side of the first guide rod 18 is sleeved with a first return spring 19, one end of the first return spring 19 is connected with the first moving block 16, and the other end of the first return spring 19 is connected with the second transmission cavity 15, through the elastic action of the first return spring 19, the first moving block 16 can extrude and limit the second moving block 17, the limiting block 25 moves into the inside of the limiting groove 26, and the fixing of the rotating rod 27 is completed.

[0040] Please refer to Figure 6 The outer side of the second guide rod 20 is sleeved with a second return spring 21, one end of the second return spring 21 is connected with the connecting block 22, and the other end of the second return spring 21 is connected with the second transmission cavity 15, under the condition that the first moving block 16 releases the limiting of the second moving block 17, the elastic action of the second return spring 21 can make the limiting block 25 lead out of the inside of the limiting groove 26, so as to facilitate the release of the fixing of the rotating rod 27.

[0041] Please refer to Figure 3 and Figure 6 The inner side of the replacement seat 14 is provided with an annular pull block 23, the annular pull block 23 is in close contact with the replacement seat 14, a connecting rod 24 is adhered and fixed at the middle position of the inner side of the first moving block 16, one end of the connecting rod 24 penetrates and extends to the outside of the second transmission cavity 15, and the other end of the connecting rod 24 outside the second transmission cavity 15 is adhered and fixed with the annular pull block 23, through the design of the annular pull block 23 and the connecting rod 24, the operator can conveniently pull the annular pull block 23 to operate the first moving block 16, and then control the unlocking and release of the cleaning mechanism, so as to improve the operability and user experience of the equipment.

[0042] Please refer to Figure 6The rotating rod 27 is located in the upper and lower sides of the inner end of the replacement seat 14, and a limiting groove 26 is arranged in each side. One end of the second moving block 17 is fixedly connected with a limiting block 25, and one end of the limiting block 25 extends to the outside of the second transmission cavity 15. One end of the limiting block 25 located outside the second transmission cavity 15 is matched with the limiting groove 26. The cooperation of the limiting groove 26 and the limiting block 25 realizes the locking and unlocking functions of the rotating rod 27, ensures the stability of the rotating rod 27 during normal work, and can conveniently unlock and take out the rotating rod 27 and the winding rod 28 thereon when cleaning is needed.

[0043] Please refer to Figure 4 The outer part of the first transmission rod 7 is provided with two first bearings 8, the outer wall of the first bearing 8 is connected with the first transmission cavity 4, and the inner wall of the first bearing 8 is connected with the outer wall of the first transmission rod 7. The first bearing 8 can reduce the friction and wear of the first transmission rod 7 during rotation, improve the transmission efficiency and service life, and maintain the stability and precision of the transmission system.

[0044] Please refer to Figure 2 The outer part of the second transmission rod 10 is provided with two second bearings 11, the outer wall of the second bearing 11 is connected with the first transmission cavity 4, and the inner wall of the second bearing 11 is connected with the outer wall of the second transmission rod 10. The second bearing 11 can reduce the friction and wear of the second transmission rod 10 during rotation, improve the transmission efficiency and service life, and ensure the stable operation of the transmission system.

[0045] Working principle: in use, through the support leg 29 and support block 30 to support the permanent magnet axial flow pump 1, through the damping shaft to rotate the extension block 31, by adjusting the angle of extension block 31 can adapt to the not horizontal placement surface, through the extension block 31 lower end of the antiskid soft pad can increase the friction, improve the stability when placing, when starting the permanent magnet motor 2 drive shaft 3 will drive the impeller rotation, suction flow, drive shaft 3 in will drive the first bevel gear 5 rotation, because the first bevel gear 5 and four second bevel gear 6 meshing connection, will drive the second bevel gear 6 synchronous rotation of the first transmission rod 7, the first bearing 8 to ensure the smooth rotation of the first transmission rod 7, the first transmission rod 7 will drive one of the third bevel gear 9 rotation, because the third bevel gear 9 and another third bevel gear 9 meshing connection, will make another third bevel gear 9 synchronous rotation, thus will drive the second transmission rod 10 synchronous rotation, the second bearing 11 ensures the smooth rotation of the second transmission rod 10, the rotation of the second transmission rod 10 will drive one of the fourth bevel gear 12, the fourth bevel gear 12 and another fourth bevel gear 12 meshing connection will make the third transmission rod 13 rotation, the third transmission rod 13 will drive the replacement seat 14 synchronous rotation of the rotating rod 27, the rotating rod 27 rotation will drive a plurality of winding rod 28 synchronous rotation, when there are flocculent impurities into the permanent magnet axial flow pump 1, through the rotating winding rod 28 can be wound flocculent impurities, make flocculent impurities after winding attached to the winding rod 28, thus effectively prevent these impurities into the interior of the permanent magnet axial flow pump 1, avoid the winding and blockage of the pump impeller and other components, when cleaning the flocculent impurities pull ring pull block 23, under the connection of connecting rod 24 will make the first moving block 16 synchronous movement, the movement of the first moving block 16 will make the first return spring 19 be compressed, and will remove the extrusion limit of the second moving block 17, at this time under the pull of the second return spring 21, the second moving block 17 will drive the limit block 25 into the second transmission cavity 15, the limit block 25 from the limit groove 26 will remove the limit of the rotating rod 27, by pulling the rotating rod 27 can make it with winding rod 28 from the lower end of the permanent magnet axial flow pump 1, convenient for cleaning, and when installing only need to pull the ring pull block 23 again, make the rotating rod 27 inserted into the replacement seat 14 inside, no need to stop or complex disassembly steps, ensure the continuous and efficient operation of the permanent magnet axial flow pump 1.

[0046] It will be apparent to those skilled in the art that the application is not limited to the details of the above-exemplified embodiments and that the present application can be implemented in other particular forms without departing from the spirit or essential characteristics of the present application. The embodiments should therefore be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the above description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. No reference signs in the claims should be considered as limiting the scope of the claims with respect to the figures of the patent document.

Claims

1. A permanent magnet axial flow pump for municipal engineering, comprising a permanent magnet axial flow pump (1), a permanent magnet motor (2) being provided on the upper side of the interior of the permanent magnet axial flow pump (1), a drive shaft (3) being provided at the output end of the permanent magnet motor (2) via a coupling, and four support legs (29) being equidistantly distributed in an annular shape being provided on the upper side of the interior of the permanent magnet axial flow pump (1), characterized in that: It also includes a first transmission cavity (4), which is opened inside the support leg (29), a first transmission rod (7) is rotatably provided on the upper side of the first transmission cavity (4), a second transmission rod (10) is provided at a middle position inside the first transmission cavity (4), and a third transmission rod (13) is rotatably provided on the lower side of the first transmission cavity (4), and one end of the third transmission rod (13) extends to the outside of the first transmission cavity (4); The present invention also includes a replacement seat (14), which is arranged outside the first transmission cavity (4) when the third transmission rod (13) is located. The replacement seat (14) is fixedly connected to the third transmission rod (13). A rotating rod (27) is provided inside the replacement seat (14). The rotating rod (27) is slidably matched with the replacement seat (14), and one end of the rotating rod (27) extends to the outside of the replacement seat (14). The outer wall of the rotating rod (27) located at one end outside the replacement seat (14) is welded with four groups of winding rods (28) distributed in an annular manner and at equal intervals, and each group of winding rods (28) is welded with five winding rods distributed in an equal intervals. The upper and lower sides of the interior of the replacement seat (14) are both provided with a second transmission cavity (15). The second transmission cavity (15) is provided on the upper and lower sides of the interior of the replacement seat (14). A first moving block (16) is provided inside each cavity (15), a second moving block (17) is provided on one side of each first moving block (16), a first guide rod (18) is welded inside each second transmission cavity (15), a second guide rod (20) is welded on one side of each second transmission cavity (15), the first moving block (16) and the first guide rod (18) and the second moving block (17) and the second guide rod (20) are connected via a connecting block (22), the connecting block (22) is penetrated by the first guide rod (18) and the second guide rod (20), and the connecting block (22) is slidably matched with the first guide rod (18) and the second guide rod (20); It also includes a support block (30) which is arranged at the lower end of the support leg (29). Three extension blocks (31) are arranged inside the support block (30), and the extension blocks (31) are connected to the support block (30) through a damping device.

2. A permanent magnet axial flow pump for municipal engineering according to claim 1, characterized in that: A first bevel gear (5) is provided on the upper side of the outer wall of the drive shaft (3), a second bevel gear (6) is provided at one end of each of the first transmission rods (7), and the second bevel gears (6) are meshed and connected with the first bevel gear (5).

3. A permanent magnet axial flow pump for municipal engineering according to claim 2, characterized in that: A third bevel gear (9) is provided on one side of the outer wall of the first transmission rod (7) and the upper end of the second transmission rod (10), and the third bevel gears (9) are meshed and connected.

4. A permanent magnet axial flow pump for municipal engineering according to claim 3, characterized in that: The lower end of the second transmission rod (10) and the outer wall of one end of the third transmission rod (13) located inside the first transmission cavity (4) are both provided with a fourth bevel gear (12), and the fourth bevel gears (12) are meshed and connected.

5. The permanent magnet axial flow pump for municipal engineering according to claim 1, characterized in that: A first return spring (19) is sleeved on one side of the outside of the first guide rod (18), one end of the first return spring (19) is connected to the first moving block (16), and the other end of the first return spring (19) is connected to the second transmission chamber (15).

6. A permanent magnet axial flow pump for municipal engineering according to claim 5, characterized in that: A second return spring (21) is sleeved on one side of the exterior of the second guide rod (20), one end of the second return spring (21) is connected to the connecting block (22), and the other end of the second return spring (21) is connected to the second transmission chamber (15).

7. The permanent magnet axial flow pump for municipal engineering according to claim 1, characterized in that: An annular pull block (23) is provided on the inner side of the replacement seat (14), and the annular pull block (23) is fitted with the replacement seat (14). A connecting rod (24) is adhered and fixed at the middle position of the inner side of the first moving block (16), and one end of the connecting rod (24) passes through and extends to the outside of the second transmission cavity (15). The end of the connecting rod (24) located outside the second transmission cavity (15) is adhered and fixed to the annular pull block (23).

8. The permanent magnet axial flow pump for municipal engineering according to claim 1, characterized in that: The rotating rod (27) is provided with limiting grooves (26) on the upper and lower sides of one end inside the replacement seat (14); one end of the second movable block (17) is adhered and fixed to the limiting block (25); one end of the limiting block (25) passes through and extends to the outside of the second transmission cavity (15); and one end of the limiting block (25) located outside the second transmission cavity (15) is adapted to the limiting groove (26).

9. The permanent magnet axial flow pump for municipal engineering according to claim 1, characterized in that: Two first bearings (8) are provided on the outside of the first transmission rod (7), the outer walls of the first bearings (8) are connected to the first transmission cavity (4), and the inner walls of the first bearings (8) are connected to the outer wall of the first transmission rod (7).

10. The permanent magnet axial flow pump for municipal engineering according to claim 1, characterized in that: Two second bearings (11) are provided on the outside of the second transmission rod (10), the outer walls of the second bearings (11) are connected to the first transmission cavity (4), and the inner walls of the second bearings (11) are connected to the outer wall of the second transmission rod (10).

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