Double-mechanical-seal quick-release centrifugal pump

Abstract

The utility model discloses a double-mechanical-seal quick-release centrifugal pump which comprises a pump body, a pump cover, a mechanical seal connecting frame, an upper machine seal cover, an impeller, a power element, a first mechanical seal, a second mechanical seal and a quick-release assembly. The power element is a disc type rare earth permanent magnet motor; the quick release assembly comprises a fixing block, a mounting seat and a clamping piece, the fixing block is connected to the end, close to the power element, of the mechanical seal connecting frame, and the mounting seat is connected to the second fixing end of the power element; one end of the clamping piece is connected with the fixing block, and the other end of the clamping piece is slidably clamped with the mounting seat; one end of the first flushing pipeline is communicated with the first mechanical seal, and the other end is communicated with the second mechanical seal; one end of the second flushing pipeline is communicated with the second mechanical seal, and the other end of the second flushing pipeline is communicated with the motor cooling water channel; one end of the third flushing pipeline is communicated with the motor cooling water channel, and the other end is communicated with a liquid inlet of the pump body. Not only is the size of the centrifugal pump reduced, but also rapid disassembly and assembly of the motor are realized.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of centrifugal pumps, and particularly relates to a double mechanical seal quick-release centrifugal pump. BACKGROUND

[0002] A centrifugal pump refers to a pump for conveying liquid by centrifugal force generated by rotation of an impeller. When the centrifugal pump is working, the impeller rotates at high speed under the driving of a motor, and the blades can drive the liquid to rotate, thereby generating centrifugal force. Under the action of the centrifugal force, the liquid is thrown out from the center to the periphery along the blade flow channel, and is sent into a discharge pipe through a volute. During installation and maintenance of the centrifugal pump, the motor needs to be disassembled and assembled.

[0003] The motor used in the traditional centrifugal pump generates a high amount of heat during work, thereby reducing the working efficiency of the whole machine. In addition, during operation, the pressure in the pump cavity is prone to change, and the generated unbalanced axial force will affect the stability and service life of the pump. Moreover, the motor and the mechanical seal connecting frame of the existing centrifugal pump are usually connected in the form of screws, which will cause the centrifugal pump to be complicated to disassemble and assemble manually. Therefore, there is an urgent need for a double mechanical seal quick-release centrifugal pump. CONTENT OF THE INVENTION

[0004] The embodiment of the present application provides a double mechanical seal quick-release centrifugal pump, which solves the problems of high energy consumption caused by poor heat dissipation of the motor, difficulty in balancing the axial force when the pressure in the pump cavity changes, and complicated disassembly and assembly of the motor in the prior art.

[0005] The embodiment of the present application provides a double mechanical seal quick-release centrifugal pump, which solves the problems of high energy consumption caused by poor heat dissipation of the motor, difficulty in balancing the axial force when the pressure in the pump cavity changes, and complicated disassembly and assembly of the motor in the prior art.

[0006] In a possible implementation, the quick release assembly further comprises an elastic member; the fixing block is provided with a mounting groove in the circumferential direction, the clamping member is arranged in the mounting groove, and both ends of the clamping member extend out of the interior of the fixing block through the mounting groove; the fixing block is provided with a first mounting hole in the radial direction; the clamping member is provided with a second mounting hole in the radial direction of the fixing block; one end of the elastic member is arranged in the first mounting hole, and the other end of the elastic member is arranged in the second mounting hole; one end of the clamping member can drive the other end of the clamping member to extend and retract in the mounting groove through pressing, and the elastic member resets.

[0007] In a possible implementation, the mounting seat is provided with a receiving cavity; and one end of the clamping member, which is away from the mechanical seal connecting frame, is slidably connected in the receiving cavity.

[0008] In a possible implementation, the pump further comprises a first flushing pipeline, a second flushing pipeline and a third flushing pipeline; the pump cover and the pump body are both provided with a first flushing hole, the first flushing hole is in communication with the first mechanical seal; the mechanical seal connecting frame is provided with a second flushing hole, the second flushing hole is in communication with the second mechanical seal; one end of the first flushing pipeline is in communication with the first flushing hole, and the other end of the first flushing pipeline is in communication with the second flushing hole; the power element is provided with a cooling water channel; one end of the second flushing pipeline is in communication with the second flushing hole, and the other end of the second flushing pipeline is in communication with the cooling water channel; one end of the third flushing pipeline is in communication with the cooling water channel, and the other end of the third flushing pipeline is in communication with the liquid inlet of the pump body.

[0009] In a possible implementation, the pump further comprises a balancing member; one end of the second mechanical seal, which is away from the power element, is connected with the balancing member, and the balancing member is sleeved on the main shaft.

[0010] In a possible implementation, the pump further comprises a water throwing ring; the water throwing ring is arranged between the second mechanical seal and the power element, and the water throwing ring is sleeved on the main shaft.

[0011] In a possible implementation, the pump further comprises a bearing; the power element comprises a stator and a rotor; the bearing is arranged between both ends of the power element and the main shaft, and the bearing is located at the axial end of the stator and the rotor; the outer ring of the stator is provided with a cooling water channel.

[0012] In a possible implementation, both ends of the rotor are provided with anti-loosening structures, and the anti-loosening structures are used to prevent the parts on the rotor from loosening.

[0013] In a possible implementation, the first fastener is arranged on a side of the balance away from the second mechanical seal, and the second fastener is arranged on a side of the impeller away from the first mechanical seal.

[0014] In a possible implementation, a limiting block is further arranged on the fixing block, a limiting hole is arranged on the mounting seat, and the limiting block is slidably connected in the limiting hole.

[0015] The one or more technical solutions provided in the application have at least the following technical effects:

[0016] The utility model discloses a kind of double mechanical seal quick-release centrifugal pumps, wherein motor can be cooled by the self-flushing structure of first flushing pipeline, second flushing pipeline, cooling water passage and third flushing pipeline, solve the problem that the energy consumption increases due to poor heat dissipation of centrifugal pump, so as to improve the working efficiency of centrifugal pump unit;And, through first flushing pipeline, second flushing pipeline, cooling water passage and third flushing pipeline, the problem that axial force cannot be balanced when pump cavity pressure changes can also be solved.Further, the application is provided with quick-release assembly between motor and mechanical seal connecting frame, and the quick-release assembly includes fixing block, clamping piece, mounting seat and elastic piece, the fixing block is connected with the mechanical seal connecting frame, the mounting seat is connected with motor, and the clamping piece is arranged in the mounting groove of the fixing block.When installing motor, the clamping piece in the fixing block is pressed into the mounting seat, so that the end of the clamping piece away from the mechanical seal connecting frame is clamped in the accommodating cavity of the mounting seat, so as to realize the connection of the mounting seat and the fixing block, that is, the reliable connection of motor and mechanical seal connecting frame is realized;When disassembling motor, one end of the clamping piece is pressed to drive the other end of the clamping piece to slide in the mounting groove, so that the end of the clamping piece away from the mechanical seal connecting frame is separated from the accommodating cavity of the mounting seat, so as to loosen the connection between the fixing block and the mounting seat, that is, the quick disassembly of motor and mechanical seal connecting frame is realized.

[0017] The application solves the problems of high energy consumption due to poor heat dissipation of motor, difficulty in balancing axial force when pump cavity pressure changes, and complicated disassembly and assembly of motor in the prior art. The motor is cooled by the self-flushing structure, effectively improving the heat dissipation performance of the centrifugal pump unit, balancing the axial force, reducing the energy consumption of the centrifugal pump, and realizing the quick disassembly and assembly of the motor, thereby reducing the workload and improving the working efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical scheme of the utility model embodiment, the following will be briefly introduced the drawings needed to be used in the description of the utility model embodiment, and obviously, the drawings in the following description are some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creating labor.

[0019] Figure 1 A schematic view of a double mechanical seal quick-release centrifugal pump provided for an embodiment of the present application;

[0020] Figure 2 A schematic view of a quick-release assembly provided for an embodiment of the present application;

[0021] Figure 3 A front view of a mounting seat provided for an embodiment of the present application;

[0022] Figure 4 A front view of a fixing block provided for an embodiment of the present application; Figure 3 A-A sectional view thereof;

[0023] Figure 5 A front view of a clamping piece provided for an embodiment of the present application;

[0024] Figure 6 B-B sectional view thereof; Figure 5

[0025] Figure 7 A front view of a clamping piece provided for an embodiment of the present application;

[0026] Figure 8 C-C sectional view thereof. Figure 7

[0027] Figure legend: 1-pump body; 2-pump cover; 3-mechanical seal connecting frame; 4-impeller; 5-power element; 51-cooling water channel; 52-rotor; 53-stator; 54-bearing; 6-first mechanical seal; 7-second mechanical seal; 8-first flushing pipeline; 9-quick-release assembly; 91-fixing block; 911-mounting groove; 912-first mounting hole; 913-limiting block; 92-clamping piece; 921-second mounting hole; 93-mounting seat; 931-receiving cavity; 932-limiting hole; 94-elastic member; 10-balance element; 11-water throwing ring; 12-main shaft. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0029] ​​In the description of the embodiments of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing the embodiments of this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. The terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In addition, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this utility model can be understood according to the specific circumstances.

[0030] This utility model embodiment provides a dual-mechanical-seal quick-release centrifugal pump, such as... Figures 1-2 As shown, the pump includes a pump body 1, a pump cover 2, a mechanical seal connecting frame 3, an impeller 4, a power element 5, a first mechanical seal 6, a second mechanical seal 7, and a quick-release assembly 9. The power element 5 is located on one side of the pump body 1. The pump body 1 has an inlet and an outlet. The power element 5 is provided with a main shaft 12, which passes through the power element 5. The first mechanical seal 6 and the second mechanical seal 7 are respectively provided on the main shaft 12 at both ends of the power element 5. The first mechanical seal 6 and the impeller 4 are connected sequentially at the end of the main shaft 12 near the outlet. The second mechanical seal 7 is connected at the other end of the main shaft 12. The first fixed end of the power element 5 is connected to the pump body 1. The quick-release assembly 9 includes a fixing block 91, a snap-fit ​​component 92, and a mounting base 93. The fixing block 91 is connected to the end of the mechanical seal connecting frame 3 near the power element 5, and the mounting base 93 is connected to the second fixed end of the power element 5. One end of the snap-fit ​​component 92 is connected to the fixing block 91, and the other end of the snap-fit ​​component 92 is slidably snapped into the mounting base 93.

[0031] Exemplarily, the power element 5 adopts a disc type rare earth permanent magnet motor, which is positioned with the pump body 1 through a stop opening and connected through bolts. The motor and the impeller 4 adopt a coaxial design, avoiding the use of a shaft coupling, so as to reduce the overall axial size of the centrifugal pump set and reduce the noise value of pump set vibration caused by poor shaft coupling alignment. The disc type rare earth permanent magnet motor has a small size and a relatively thin thickness, so that the centrifugal pump set further reduces the size and weight, thereby meeting the use requirements of smaller installation space. Exemplarily, the double-seal quick-release centrifugal pump further comprises an upper mechanical seal cover and an exhaust valve; the upper mechanical seal cover is connected to one end of the mechanical seal connecting frame 3 away from the power element 5; the upper mechanical seal cover is provided with an exhaust hole; the exhaust valve is connected to the upper mechanical seal cover and communicates with the exhaust hole, and the pressure in the pump cavity can be adjusted through the exhaust valve.

[0032] Exemplarily, the mechanical seal connecting frame 3 is arranged above the disc type rare earth permanent magnet motor, the upper mechanical seal cover is arranged above the mechanical seal connecting frame 3, the mechanical seal connecting frame 3 and the disc type rare earth permanent magnet motor are connected through the quick-release assembly 9, and the mechanical seal connecting frame 3 and the upper mechanical seal cover are connected through bolts.

[0033] In the embodiment of the present application, as shown in Figures 2-8 The quick-release assembly 9 further comprises an elastic member 94; the fixing block 91 is provided with a mounting groove 911 in the circumferential direction, the clamping member 92 is arranged in the mounting groove 911, and both ends of the clamping member 92 extend out of the interior of the fixing block 91 through the mounting groove 911; the fixing block 91 is provided with a first mounting hole 912 in the radial direction; the clamping member 92 is provided with a second mounting hole 921 in the radial direction of the fixing block 91; one end of the elastic member 94 is arranged in the first mounting hole 912, and the other end of the elastic member 94 is arranged in the second mounting hole 921; one end of the clamping member 92 can be pressed to drive the other end of the clamping member 92 to extend and retract in the mounting groove 911, and the elastic member 94 is reset.

[0034] In the embodiment of the present application, as shown in Figures 2-8 The mounting seat 93 is provided with a receiving cavity 931; and one end of the clamping member 92 away from the mechanical seal connecting frame 3 is slidably connected in the receiving cavity 931.

[0035] Exemplarily, when the motor is installed, the clamping member 92 arranged in the fixing block 91 is pressed into the mounting seat 93, so that one end of the clamping member 92 away from the mechanical seal connecting frame 3 is clamped in the receiving cavity 931 of the mounting seat 93, thereby realizing the connection between the mounting seat 93 and the fixing block 91, that is, realizing the reliable connection between the motor and the mechanical seal connecting frame 3; when the motor is disassembled, one end of the clamping member 92 is pressed to drive the other end of the clamping member 92 to slide in the mounting groove 911, so that one end of the clamping member 92 away from the mechanical seal connecting frame 3 is separated from the receiving cavity 931 of the mounting seat 93, thereby loosening the connection between the fixing block 91 and the mounting seat 93, that is, realizing the quick disassembly of the motor and the mechanical seal connecting frame 3.

[0036] Exemplarily, when installing the quick release assembly 9, first, the elastic member 94 is installed in the second mounting hole 921 of the clamping member 92, then the clamping member 92 and the elastic member 94 are installed in the mounting groove 911 of the fixed block 91, finally, the fixed block 91 is connected with the mechanical seal connecting frame 3 through a screw, and then the mounting seat 93 is screwed to the end of the motor, so that the quick release assembly 9 is assembled, and then subsequent motor disassembly work is performed.

[0037] In the embodiment of the present application, as shown in Figure 1 The first flushing pipe 8, the second flushing pipe and the third flushing pipe are further included; the first flushing hole is arranged on the pump cover 2 and the pump body 1, and the first flushing hole is in communication with the first mechanical seal 6; the second flushing hole is arranged on the mechanical seal connecting frame 3, and the second flushing hole is in communication with the second mechanical seal 7; one end of the first flushing pipe 8 is in communication with the first flushing hole, and the other end of the first flushing pipe 8 is in communication with the second flushing hole; the cooling water channel 51 is arranged on the power element 5; one end of the second flushing pipe is in communication with the second flushing hole, and the other end of the second flushing pipe is in communication with the cooling water channel 51; one end of the third flushing pipe is in communication with the cooling water channel 51, and the other end of the third flushing pipe is in communication with the liquid inlet of the pump body 1.

[0038] Exemplarily, the centrifugal pump unit adopts the double mechanical seal design of the first mechanical seal 6 and the second mechanical seal 7, and the axial force generated due to the change of the pump cavity pressure can be balanced through the first flushing pipe 8, the second flushing pipe, the cooling water channel 51 and the third flushing pipe.

[0039] Exemplarily, the self-flushing structure includes the first flushing pipe 8, the second flushing pipe, the cooling water channel 51 and the third flushing pipe, and the disc type rare earth permanent magnet motor can be cooled through the self-flushing structure, so that the problem of poor heat dissipation leading to increased energy consumption is solved, and the working efficiency of the centrifugal pump unit is improved; the axial force generated due to the change of the pump cavity pressure can also be balanced through the first flushing pipe 8, the second flushing pipe, the cooling water channel 51 and the third flushing pipe.

[0040] Exemplarily, the second flushing hole includes an input end and an output end, which are arranged on the two sides of the mechanical seal connecting frame 3; the first flushing pipe 8 includes a first pipe and a threaded joint; the two ends of the first pipe are respectively provided with the threaded joints, and the two ends of the first pipe are in communication with the first flushing hole and the input end of the second flushing hole through the threaded joints; the second flushing pipe includes a second pipe and a threaded joint, the two ends of the second pipe are respectively provided with the threaded joints, and the two ends of the second pipe are in communication with the output end of the second flushing hole and the cooling water channel 51 through the threaded joints.

[0041] In the embodiment of the present application, as shown in Figure 1As shown, the centrifugal pump unit further comprises a balancing piece 10; the balancing piece 10 is sleeved on the main shaft 12 and connected to the second mechanical seal 7 away from the power element 5.

[0042] As shown, the centrifugal pump unit further comprises a balancing piece 10; the balancing piece 10 is sleeved on the main shaft 12 and connected to the second mechanical seal 7 away from the power element 5.

[0043] As shown, the centrifugal pump unit further comprises a balancing piece 10; the balancing piece 10 is sleeved on the main shaft 12 and connected to the second mechanical seal 7 away from the power element 5. Figure 1 As shown, the centrifugal pump unit further comprises a balancing piece 10; the balancing piece 10 is sleeved on the main shaft 12 and connected to the second mechanical seal 7 away from the power element 5.

[0044] As shown, the centrifugal pump unit further comprises a balancing piece 10; the balancing piece 10 is sleeved on the main shaft 12 and connected to the second mechanical seal 7 away from the power element 5.

[0045] As shown, the centrifugal pump unit further comprises a balancing piece 10; the balancing piece 10 is sleeved on the main shaft 12 and connected to the second mechanical seal 7 away from the power element 5. Figure 1 As shown, the centrifugal pump unit further comprises a balancing piece 10; the balancing piece 10 is sleeved on the main shaft 12 and connected to the second mechanical seal 7 away from the power element 5.

[0046] As shown, the centrifugal pump unit further comprises a balancing piece 10; the balancing piece 10 is sleeved on the main shaft 12 and connected to the second mechanical seal 7 away from the power element 5.

[0047] As shown, the centrifugal pump unit further comprises a balancing piece 10; the balancing piece 10 is sleeved on the main shaft 12 and connected to the second mechanical seal 7 away from the power element 5. Figure 1 As shown, the centrifugal pump unit further comprises a balancing piece 10; the balancing piece 10 is sleeved on the main shaft 12 and connected to the second mechanical seal 7 away from the power element 5.

[0048] As shown, the centrifugal pump unit further comprises a balancing piece 10; the balancing piece 10 is sleeved on the main shaft 12 and connected to the second mechanical seal 7 away from the power element 5.

[0049] As shown, the centrifugal pump unit further comprises a balancing piece 10; the balancing piece 10 is sleeved on the main shaft 12 and connected to the second mechanical seal 7 away from the power element 5. Figure 1 As shown, the centrifugal pump unit further comprises a balancing piece 10; the balancing piece 10 is sleeved on the main shaft 12 and connected to the second mechanical seal 7 away from the power element 5.

[0050] Exemplarily, the first fastener comprises a shaft end nut, which can stably mount the balancing piece 10 on the main shaft 12; the second fastener comprises an impeller locking nut and an impeller nut, which can stably mount the impeller 4 on the main shaft 12. The first fastener and the second fastener can improve the reliability of the centrifugal pump unit connection.

[0051] Exemplarily, the side wall of the pump shell is provided with a liquid outlet, and the bottom of the pump shell is provided with a liquid inlet; the motor is a disc type rare earth permanent magnet motor, and the motor and the pump adopt a coaxial design. Specifically, one end of the disc type rare earth permanent magnet motor is connected with the pump body 1, the pump body 1 and the disc type rare earth permanent magnet motor are positioned through a stop opening and an end face, the other end of the disc type rare earth permanent magnet motor is connected with the mechanical seal connecting frame 3 through the quick release assembly 9, and the disc type rare earth permanent magnet motor and the quick release assembly 9 are positioned through a stop opening and an end face. After being powered on, the rotor 52 drives the main shaft 12 to rotate, and then drives the impeller 4 and other components on the main shaft 12 to rotate, and the liquid in the pump body 1 is thrown out in all directions under the centrifugal force of the impeller 4, so that mechanical energy is converted into liquid kinetic energy.

[0052] Exemplarily, the disc type rare earth permanent magnet motor adopted in the application has a small volume and a small thickness. The motor and the pump adopt a coaxial design, so that the centrifugal pump unit further reduces the size and weight, thereby meeting the use requirement of a smaller installation space. The medium in the sealed chamber generated by the first mechanical seal 6 enters the sealed chamber generated by the second mechanical seal 7 through the first flushing pipeline 8, the medium enters the cooling water channel 51 through the second flushing pipeline to cool the disc type rare earth permanent magnet motor, and finally the medium returns to the liquid inlet from the third flushing pipeline, so that the technical effects of balancing the axial force and cooling the motor are realized. The water consumption of the application is small, and the energy consumption is saved.

[0053] In the embodiment of the application, as shown in Figures 2-8 The fixing block 91 is further provided with a limiting block 913, and the mounting seat 93 is provided with a limiting hole 932; the limiting block 913 is slidably connected in the limiting hole 932.

[0054] Exemplarily, in the process of installing the power element 5, the installation of the fixing block 91 and the mounting seat 93 can be limited through the cooperation of the limiting block 913 and the limiting hole 932.

[0055] Each embodiment in the specification is described in a progressive manner, and the same or similar parts between each embodiment can be referred to each other, and each embodiment mainly describes the difference from other embodiments.

[0056] The above examples are only used to illustrate the technical solutions of the present application, and are not intended to limit the present application; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that the technical solutions recorded in the foregoing examples can still be modified, or some or all of the technical features thereof can be replaced by equivalents; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the present application.

Claims

1. A double mechanical seal quick dismounting centrifugal pump, characterized in that, It comprises a pump body (1), a pump cover (2), a mechanical seal connecting frame (3), an impeller (4), a power element (5), a first mechanical seal (6), a second mechanical seal (7) and a quick release assembly (9); The power element (5) is arranged on one side of the pump body (1); The pump body (1) is provided with a liquid inlet and a liquid outlet; The power element (5) is provided with a main shaft (12), and the main shaft (12) penetrates through the power element (5); The two ends of the power element (5) are respectively provided with the first mechanical seal (6) and the second mechanical seal (7) on the main shaft (12); The end of the main shaft (12) close to the liquid outlet is sequentially connected with the first mechanical seal (6) and the impeller (4); The other end of the main shaft (12) is connected with the second mechanical seal (7); The first fixed end of the power element (5) is connected with the pump body (1); The quick release assembly (9) comprises a fixed block (91), a clamping piece (92) and a mounting seat (93); The fixed block (91) is connected to one end of the mechanical seal connecting frame (3) close to the power element (5), and the mounting seat (93) is connected to the second fixed end of the power element (5); One end of the clamping piece (92) is connected with the fixed block (91), and the other end of the clamping piece (92) is slidably connected with the mounting seat (93).

2. The dual mechanical seal quick disconnect centrifugal pump of claim 1, wherein, The quick release assembly (9) further comprises a resilient piece (94); A mounting groove (911) is formed in the circumferential direction of the fixed block (91), the clamping piece (92) is arranged in the mounting groove (911), and the two ends of the clamping piece (92) extend out of the interior of the fixed block (91) through the mounting groove (911); A first mounting hole (912) is formed in the radial direction of the fixed block (91); A second mounting hole (921) is formed in the clamping piece (92) in the radial direction of the fixed block (91); One end of the resilient piece (94) is arranged in the first mounting hole (912), and the other end of the resilient piece (94) is arranged in the second mounting hole (921); By pressing one end of the clamping piece (92), the other end of the clamping piece (92) can be extended and retracted in the mounting groove (911), and reset through the resilient piece (94).

3. The quick disconnect centrifugal pump of claim 1, wherein, The mounting seat (93) is provided with a receiving cavity (931); The end of the clamping piece (92) away from the mechanical seal connecting frame (3) is slidably connected in the receiving cavity (931).

4. The quick disconnect centrifugal pump of claim 1, wherein, It further comprises a first flushing pipeline (8), a second flushing pipeline and a third flushing pipeline; The pump cover (2) and the pump body (1) are both provided with a first flushing hole, and the first flushing hole is in communication with the first mechanical seal (6); The mechanical seal connecting frame (3) is provided with a second flushing hole, and the second flushing hole is in communication with the second mechanical seal (7); One end of the first flushing pipeline (8) is in communication with the first flushing hole, and the other end of the first flushing pipeline (8) is in communication with the second flushing hole; The power element (5) is provided with a cooling water channel (51); One end of the second flushing pipeline is communicated with the second flushing hole, and the other end of the second flushing pipeline is communicated with the cooling water channel (51); One end of the third flushing pipeline is communicated with the cooling water channel (51), and the other end of the third flushing pipeline is communicated with the liquid inlet of the pump body (1).

5. The quick disconnect centrifugal pump of claim 1, wherein, Further comprising a balancing piece (10); The second mechanical seal (7) is connected with the balancing piece (10) away from the power element (5), and the balancing piece (10) is sleeved on the main shaft (12).

6. The quick disconnect centrifugal pump of claim 1, wherein, Further comprising a water throwing ring (11); The second mechanical seal (7) and the power element (5) are further provided with the water throwing ring (11), and the water throwing ring (11) is sleeved on the main shaft (12).

7. The quick disconnect centrifugal pump of claim 1, wherein, Further comprising a bearing (54); The power element (5) comprises a stator (53) and a rotor (52); The power element (5) is provided with the bearing (54) between both ends and the main shaft (12), and the bearing (54) is located at the axial end of the stator (53) and the rotor (52); The outer ring of the stator (53) is provided with a cooling water channel (51).

8. The quick disconnect centrifugal pump of claim 7, wherein, Both ends of the rotor (52) are provided with anti-loosening structures, which are used for preventing the parts on the rotor (52) from loosening.

9. The quick disconnect centrifugal pump of claim 5, wherein, Further comprising a first fastener and a second fastener; The first fastener is arranged on the side of the balancing piece (10) away from the second mechanical seal (7); The second fastener is arranged on the side of the impeller (4) away from the first mechanical seal (6).

10. The quick disconnect centrifugal pump of claim 1, wherein, The fixing block (91) is further provided with a limiting block (913); The mounting seat (93) is provided with a limiting hole (932); The limiting block (913) is slidably connected in the limiting hole (932).

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