Self-priming pump with accelerated exhaust

Abstract

The application discloses a self-suction pump with exhaust acceleration, which comprises a volute formed on a side wall of a pump body close to a water pump motor, a centrifugal impeller located in the volute, a water inlet inner pipe formed in the pump body, one end of the water inlet inner pipe being communicated with a water inlet pipe and the other end being communicated with an inlet of the volute, a space outside the volute and the water inlet inner pipe being divided into a gas-liquid separation chamber on the upside and a liquid storage chamber on the downside, a backflow hole being formed at the bottom of the volute, a water outlet being located in the gas-liquid separation chamber, the liquid storage chamber being communicated with an inner space of the volute through the backflow hole, and an exhaust acceleration device being arranged on a supporting bottom plate, an upper side wall of the pump body being formed with a first exhaust hole with an upper opening and a lower opening at one end close to the water pump motor, the exhaust acceleration device being communicated with the gas-liquid separation chamber through the first exhaust hole, and the exhaust acceleration device being used for accelerating the separated air in the gas-liquid separation chamber to be discharged from the pump body. The application improves the working efficiency of the centrifugal impeller, and the air in the water inlet pipe is more quickly sucked out, so that the water outlet speed of the self-suction pump is improved.

Description

Technical Field

[0001] This application relates to the field of self-priming pumps, and more particularly to a self-priming pump for accelerating exhaust. Background Technology

[0002] The traditional self-priming pump operates on the following principle: When the pump is first started, the storage chamber is filled with liquid. Then, the centrifugal impeller rotates under the drive of the main shaft. Centrifugal force causes the liquid to be ejected from the outlet of the volute, creating a negative pressure at the center of the impeller (the liquid will flow back into the volute from the bottom return hole). This allows air from the inlet pipe to enter the impeller and mix with the liquid before being ejected from the outlet of the volute. In the gas-liquid separation chamber outside the volute outlet, the air and liquid separate. The air is discharged from the pump body, and the liquid flows back into the volute from the bottom return hole. This process gradually empties the air from the inlet pipe, allowing the liquid to enter the volute from the inlet pipe and then into the gas-liquid separation chamber until the entire pump body is filled with liquid. Finally, the liquid is discharged from the outlet pipe of the pump body.

[0003] After gas and liquid are separated in the gas-liquid separation chamber, the air is naturally discharged along the outlet pipe of the pump body. This slow gas discharge speed is not conducive to the rapid water output of the self-priming pump. Summary of the Invention

[0004] In order to improve the water discharge speed of a self-priming pump, this application provides a self-priming pump that accelerates air discharge.

[0005] The self-priming pump for accelerating exhaust provided in this application adopts the following technical solution: A self-priming pump for accelerating exhaust includes a support base plate, a water pump motor, a water pump shaft connected to the output shaft of the water pump motor, a centrifugal impeller coaxially fixed on the water pump shaft, and a hollow pump body. An outlet is formed in the middle of the upper side wall of the pump body, and an inlet pipe is installed at the end away from the water pump motor. A volute is formed on the side wall of the pump body near the water pump motor. The centrifugal impeller is located inside the volute. An inner inlet pipe is formed inside the pump body; one end of the inner inlet pipe communicates with the inlet pipe, and the other end communicates with the inlet of the volute. The pump body is located within the volute. The space outside the shell and the inner inlet pipe is divided into an upper gas-liquid separation chamber and a lower liquid storage chamber; the bottom of the volute is formed with a reflux hole, and the outlet is located in the gas-liquid separation chamber; the liquid storage chamber is connected to the internal space of the volute through the reflux hole; it also includes an exhaust acceleration device set on the support base plate; the upper side wall of the pump body near the pump motor is formed with a first exhaust hole with openings at the top and bottom; the exhaust acceleration device is connected to the gas-liquid separation chamber through the first exhaust hole; the exhaust acceleration device is used to accelerate the discharge of the air separated in the gas-liquid separation chamber from the pump body.

[0006] By adopting the above technical solution, when air and liquid are separated in the gas-liquid separation chamber, the exhaust acceleration device accelerates the air out of the pump body through the first exhaust hole. This reduces the air pressure in the gas-liquid separation chamber, making it easier for the gas-liquid mixture to leave the volute, thereby improving the working efficiency of the centrifugal impeller and drawing out the air from the inlet pipe more quickly, thus increasing the water output speed of the self-priming pump.

[0007] Optionally, the exhaust acceleration device includes a first exhaust pipe and an exhaust drive mechanism; the exhaust drive mechanism includes a cylindrical air guide tube with openings at the top and bottom, an airflow drive assembly and a rotation transmission assembly coaxially rotatably disposed within the air guide tube; the rotation transmission assembly is used to connect the water pump shaft and the airflow drive assembly; the water pump shaft drives the airflow drive assembly to rotate through the rotation transmission assembly; the airflow drive assembly is used to generate airflow from top to bottom; one end of the first exhaust pipe is connected to the upper end face of the pump body and communicates with the first exhaust port, and the other end is coaxially disposed directly above the air guide tube; a first solenoid valve is provided on the first exhaust pipe.

[0008] By adopting the above technical solution, the airflow drive component and the water pump shaft are linked by the rotation transmission component to generate an airflow from top to bottom, so that the first exhaust pipe can draw out the gas from the gas-liquid separation chamber; thus, the exhaust is accelerated by the water pump shaft, eliminating the need for a separate drive component and reducing costs; the presence of the first solenoid valve allows the first exhaust pipe to be closed after exhaust is completed, preventing liquid from being discharged from the first exhaust pipe, which is beneficial to the normal operation of the self-priming pump.

[0009] Optionally, the first exhaust pipe has a coaxially arranged annular cylinder outlet pipe formed at one end near the air guide cylinder; a pair of fan-shaped upper sealing plates at a 180-degree angle are horizontally movable on the upper surface of the air guide cylinder; the outer diameter of the upper sealing plate is larger than the outer diameter of the air guide cylinder; the air guide cylinder is provided with a horizontal driving component; the horizontal driving component is used to drive the pair of upper sealing plates to move closer or further apart; when the pair of upper sealing plates move closer to each other, the inner cylindrical surface of the upper sealing plate abuts against the outlet pipe.

[0010] By adopting the above technical solution, during exhaust, a pair of upper sealing plates move closer to each other, thereby cooperating with the air end pipes to block the upper opening of the air guide tube. The force of the airflow driving component is entirely applied to the first exhaust pipe, thus improving the exhaust efficiency.

[0011] Optionally, the cylindrical surface of the air outlet pipe is formed with a coaxially arranged annular groove for insertion; the diameter of the insertion groove is the same as the inner diameter of the upper sealing plate.

[0012] By adopting the above technical solution, when a pair of upper sealing plates approach each other, the inner ends of the pair of upper sealing plates are inserted into the insertion ring groove, thereby improving the sealing performance and improving the efficiency of exhaust.

[0013] Optionally, a coaxially arranged semi-circular lower moving groove is formed on the lower end surface of the upper sealing plate, and the diameter of the lower moving groove is the same as the outer diameter of the air guide cylinder.

[0014] By adopting the above technical solution, when a pair of upper sealing plates approach each other, the upper end of the air guide tube is located in a pair of lower moving grooves, thereby improving the sealing performance and improving the efficiency of exhaust.

[0015] Optionally, the air guide tube is located directly above the water pump motor.

[0016] By adopting the above technical solution, the airflow generated by the airflow drive component is used to accelerate the heat dissipation of the water pump motor, thus avoiding energy waste.

[0017] Optionally, it also includes a second exhaust pipe; the upper side wall of the pump body away from the pump motor is formed with a second exhaust hole with openings at the top and bottom; one end of the second exhaust pipe is connected to the water inlet pipe and the other end is connected to the gas-liquid separation chamber through the second exhaust hole; a one-way valve on the water inlet side is provided on the second exhaust pipe.

[0018] By adopting the above technical solution, during exhaust, the air in the intake pipe enters the gas-liquid separation chamber through the second exhaust pipe, and then is discharged through the first exhaust pipe, which further increases the exhaust speed and thus increases the water output speed.

[0019] Optionally, the upper part of the gas-liquid separation chamber is provided with a sealing mechanism; the sealing mechanism includes a pair of side sealing heads and a middle sealing head; when venting, the first vent and the second vent are in the open state, and the middle sealing head blocks the outlet; when draining, the outlet is in the open state, one of the side sealing heads blocks the first vent and the other side sealing head blocks the second vent.

[0020] By adopting the above technical solution, during exhaust, the first exhaust port and the second exhaust port are in the open state, and the middle sealing head blocks the water outlet. In this way, during normal exhaust, external air will not enter the gas-liquid separation chamber in reverse through the water outlet, thereby increasing the exhaust speed and thus increasing the water output speed.

[0021] Optionally, the first vent and the second vent are symmetrically arranged relative to the outlet; the sealing mechanism further includes a pair of linkage components; the side sealing head includes a float plate and a side sealing head body disposed on the float plate; the float plate is vertically slidably disposed in the gas-liquid separation chamber; the side sealing head body is used to seal the first vent or the second vent; the linkage component includes a telescopic guide sleeve rotatably connected between a pair of opposing side walls of the gas-liquid separation chamber, a lower telescopic plate hinged to the inner end of the float plate, and an upper telescopic plate hinged to the end face of the intermediate sealing head; the lower telescopic plate is telescopically disposed at the lower end of the telescopic guide sleeve; the upper telescopic plate is telescopically disposed at the upper end of the telescopic guide sleeve; during venting, the pair of side sealing heads are at the lowest end, the intermediate sealing head is at the highest end and blocks the outlet; during drainage, the pair of side sealing heads are at the highest end, one side sealing head blocks the first vent, the other side sealing head blocks the second vent, and the intermediate sealing head is at the lowest end.

[0022] By adopting the above technical solution, during venting, the pair of side sealing heads are at the bottom and the middle sealing head is at the top, blocking the outlet. This facilitates normal and accelerated venting. After venting is completed, the liquid level in the gas-liquid separation chamber gradually rises. Due to buoyancy, the float gradually rises. During this process, the middle sealing head descends, thereby opening the outlet, until the pair of side sealing heads block the first and second vent holes respectively. In this way, the liquid will not be discharged through the first vent pipe but will flow back into the inlet pipe through the second vent pipe. The structure is simple and effectively ensures the normal operation of the self-priming pump.

[0023] Optionally, a filter assembly may be detachably installed on the water inlet pipe.

[0024] By adopting the above technical solution, the filter assembly filters out impurities in the liquid, thereby reducing the possibility of clogging of the self-priming pump's return hole, reducing the number of maintenance operations of the self-priming pump, and thus improving the service life of the self-priming pump.

[0025] In summary, the beneficial effects of this application are as follows: 1. Improve the working efficiency of the centrifugal impeller to draw out air from the inlet pipe more quickly, thereby increasing the water output speed of the self-priming pump.

[0026] 2. During exhaust, the air in the intake pipe enters the gas-liquid separation chamber through the second exhaust pipe, and then is discharged through the first exhaust pipe, which further increases the exhaust speed and thus increases the water output speed.

[0027] 3. The filter assembly removes impurities from the liquid, thereby reducing the possibility of clogging of the self-priming pump's return hole, reducing the number of maintenance operations, and thus extending the service life of the self-priming pump. Attached Figure Description

[0028] Figure 1 This is a cross-sectional structural diagram of this application.

[0029] Figure 2 This application is Figure 1 A schematic diagram of the exhaust acceleration device 90 in the middle.

[0030] Figure 3 This application is Figure 1 A magnified structural diagram of part A in the diagram.

[0031] Figure 4 This application is Figure 1 A magnified schematic diagram of part B in the diagram.

[0032] Figure 5 This is a top view of the upper sealing plate 95 and the air outlet pipe 971 of this application.

[0033] Figure 6 This application is Figure 1 A cross-sectional structural diagram of the middle filter component 80.

[0034] Explanation of reference numerals in the attached figures: 1. Support base plate; 1. Water pump motor; 1. Water pump shaft; 1. Centrifugal impeller; 50. Pump body; 500. First vent; 501. Second vent; 502. Outlet; 51. First inlet pipe; 52. Outlet pipe; 53. Inner inlet pipe; 54. Volute; 540. Return hole; 55. Sealing mechanism; 551. Guide support plate; 552. Side sealing head; 5521. Float plate; 5522. Vertical guide rod; 5523. Side sealing support plate; 5524. Side sealing insert; 553. Linkage assembly; 5531. Lower telescopic plate; 5532. Telescopic guide sleeve; 5533. Upper telescopic plate; 554. Intermediate sealing head; 5541. Intermediate sealing support plate; 5542. Intermediate sealing insert; 60. Second water inlet pipe; 600. Installation trough; 70. Third water inlet pipe; 80. Filter assembly; 81. Filter housing; 810. Limiting groove; 811. Sinking groove; 82. Filter screen; 83. Limiting ring; 84. Connecting bolt; 90. Exhaust acceleration device; 91. First bracket; 92. Second bracket; 921. Vertical support plate; 922. Air guide tube; 9221. Horizontal support plate; 92210. Sliding guide groove; 923. Horizontal connecting plate; 93. Airflow drive assembly; 931. Airflow drive main shaft; 932. Axial flow impeller; 94. Rotary transmission assembly; 941. Driving bevel gear; 942. Driving drive shaft; 943. Driven bevel gear; 944. Driving pulley; 945. Synchronous belt; 946. Driven pulley; 95. Upper sealing plate; 951. Drive connecting plate; 96. Horizontal drive electric cylinder; 97. First exhaust pipe; 971. Exhaust end pipe; 9710. Insertion ring groove; 98. Exhaust side check valve; 99. First solenoid valve.

[0035] 100. Second exhaust pipe; 101. Water inlet side check valve; 102. Second solenoid valve. Detailed Implementation

[0036] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.

[0037] This application discloses a self-priming pump that accelerates exhaust, referenced Figure 1 The pump body includes a support base plate 10, a water pump motor 20, a water pump shaft 30 connected to the output shaft of the water pump motor 20, a centrifugal impeller 40 coaxially fixed on the water pump shaft 30, and a hollow pump body 50. An outlet 502 is formed in the middle of the upper side wall of the pump body 50, and an inlet pipe is installed at the end away from the water pump motor 20. An outlet pipe 52 is fixed on the upper end face of the pump body 50, and the outlet pipe 52 communicates with the outlet 502. A section of the pump body 50 is formed on the side wall near the water pump motor 20. There is a volute 54; a centrifugal impeller 40 is located inside the volute 54; an inlet pipe 53 is formed inside the pump body 50; one end of the inlet pipe 53 is connected to the inlet pipe and the other end is connected to the inlet of the volute 54; the space outside the volute 54 and the inlet pipe 53 of the pump body 50 is divided into an upper gas-liquid separation chamber and a lower liquid storage chamber; a reflux hole 540 is formed at the bottom of the volute 54, and the outlet is located in the gas-liquid separation chamber; the liquid storage chamber is connected to the internal space of the volute 54 through the reflux hole 540.

[0038] refer to Figure 1 The water inlet pipe includes a first water inlet pipe 51 connected to the pump body 50, a second water inlet pipe 60 connected to the first water inlet pipe 51, and a third water inlet pipe 70 connected to the second water inlet pipe 60; the first water inlet pipe 51, the second water inlet pipe 60, and the third water inlet pipe 70 are all connected by flanges.

[0039] refer to Figure 1 and Figure 6The second water inlet pipe 60 has a coaxially arranged cylindrical groove 600 formed at one end near the third water inlet pipe 70; a filter assembly 80 is inserted into the groove 600; the filter assembly 80 includes a cylindrical annular filter housing 81 that mates with the groove 600, a pair of circular filter screens 82 detachably connected to the filter housing 81, and a pair of annular limiting rings 83; coaxially arranged annular grooves 810 are formed on the left and right end faces of the filter housing 81; the limiting grooves 810... The diameter of the filter screen 82 and the outer diameter of the limiting ring 83 are the same; the limiting groove 810, the filter screen 82 and the limiting ring 83 correspond one-to-one; several radially arranged recessed grooves 811 are formed on the outer cylindrical surface of the limiting groove 810; a connecting bolt 84 is inserted into the recessed groove 811; the inner end of the connecting bolt 84 is screwed to the outer cylindrical surface of the filter screen 82; one end of the filter screen 82 abuts against the inner wall of the limiting groove 810 and the other end abuts against the limiting ring 83.

[0040] refer to Figure 1 A second exhaust pipe 100 is connected between the second inlet pipe 60 and the pump body 50; a second exhaust hole 501 with openings at the top and bottom is formed on the upper side wall of the pump body 50 away from the pump motor 20; one end of the second exhaust pipe 100 is connected to the second inlet pipe 60, and the other end is connected to the gas-liquid separation chamber through the second exhaust hole 501; an inlet-side check valve 101 and a second solenoid valve 102 are installed on the second exhaust pipe 100; the second solenoid valve 102 is located on the side of the inlet-side check valve 101 away from the pump motor 20.

[0041] refer to Figure 1 and Figure 2 An exhaust acceleration device 90 is provided on the side of the pump body 50 near the water pump motor 20; the exhaust acceleration device 90 includes a first exhaust pipe 97 and an exhaust drive mechanism.

[0042] refer to Figure 1 and Figure 2 The exhaust drive mechanism includes a first bracket 91, a second bracket 92, an airflow drive assembly 93, and a rotation transmission assembly 94.

[0043] refer to Figure 1 and Figure 2The first bracket 91 is gantry-shaped and fixed to the upper surface of the support base plate 10; the first bracket 91 spans the water pump shaft 30; the second bracket 92 includes a pair of inverted L-shaped vertical support plates 921 fixed to the upper surface of the support base plate 10, a cylindrical air guide tube 922 with upper and lower openings fixed between the horizontal portions of the pair of vertical support plates 921, and a horizontal connecting plate 923 fixed between the upper portions of the vertical portions of the pair of vertical support plates 921; the pair of vertical support plates 921 are located on both sides of the water pump motor 20; the horizontal connecting plate 923 and the air guide tube 922 are located directly above the water pump motor 20; the size of the horizontal connecting plate 923 is smaller than the size of the lower opening of the air guide tube 922.

[0044] refer to Figure 2 and Figure 4 The airflow drive assembly 93 includes an airflow drive main shaft 931 that passes vertically through and is rotatably connected to a horizontal connecting plate 923, and an axial flow impeller 932 that is coaxially fixed to the upper end of the airflow drive main shaft 931; the airflow drive main shaft 931 is coaxially arranged with the air guide tube 922; the axial flow impeller 932 is located inside the air guide tube 922; the rotating axial flow impeller 932 generates airflow from top to bottom.

[0045] refer to Figure 2 The rotating transmission assembly 94 includes a driving bevel gear 941 coaxially fixed on the water pump shaft 30, a driving drive shaft 942 vertically passing through and rotatably connected to the horizontal part of the first bracket 91, a driving pulley 944 coaxially fixed to the upper end of the driving drive shaft 942, a driven bevel gear 943 coaxially fixed to the lower end of the driving drive shaft 942 and meshing with the driving bevel gear 941, a driven pulley 946 coaxially fixed to the lower end of the airflow drive main shaft 931, and a synchronous belt 945 connecting the driving pulley 944 and the driven pulley 946.

[0046] refer to Figures 2-4 The upper side wall of the pump body 50 near the pump motor 20 has a first vent hole 500 with openings at the top and bottom. One end of the first vent pipe 97 is connected to the upper end face of the pump body 50 and communicates with the first vent hole 500, and the other end is coaxially arranged directly above the air guide cylinder 922. The first vent pipe 97 is provided with a first solenoid valve 99 and an exhaust-side check valve 98. The first solenoid valve 99 is located on the side of the exhaust-side check valve 98 near the pump body 50.

[0047] refer to Figure 2 , Figure 4 and Figure 5The first exhaust pipe 97 has an outlet pipe 971 formed at one end near the air guide cylinder 922, which is coaxially arranged with a circular cylinder. A fan-shaped upper sealing plate 95 with a 180-degree angle is horizontally moved on the upper surface of the air guide cylinder 922. The air guide cylinder 922 is provided with a horizontal driving component. The horizontal driving component is used to drive a pair of upper sealing plates 95 to move closer or further apart.

[0048] refer to Figure 2 , Figure 4 and Figure 5 The lower end face of the upper sealing plate 95 is formed with a coaxially arranged semi-circular lower moving groove and the diameter of the lower moving groove is the same as the outer diameter of the air guide tube 922; the cylindrical surface of the air outlet pipe 971 is formed with a coaxially arranged annular groove-shaped insertion ring groove 9710; the diameter of the insertion ring groove 9710 is the same as the inner diameter of the upper sealing plate 95; when a pair of upper sealing plates 95 approach each other, they form a complete ring, the upper sealing plate 95 is inserted into the insertion ring groove 9710 and the upper sealing plate 95 abuts against the inner cylindrical surface of the insertion ring groove 9710.

[0049] refer to Figure 2 , Figure 4 and Figure 5 A horizontal support plate 9221 is formed on the outer cylindrical surface of the air guide cylinder 922; the horizontal drive component includes a pair of horizontal drive electric cylinders 96 fixed on the upper end surface of the horizontal support plate 9221; the pair of horizontal drive electric cylinders 96 are located on both sides of the air guide cylinder 922; the pair of horizontal drive electric cylinders 96 are parallel and arranged in opposite directions; a drive connecting plate 951 is fixed to one end of the upper sealing plate 95; a sliding guide groove 92210 is formed on the horizontal support plate 9221; the drive connecting plate 951 corresponds one-to-one with the sliding guide groove 92210 and a sliding guide block that cooperates with the sliding guide groove 92210 is formed on the lower end surface of the drive connecting plate 951; the drive connecting plate 951 corresponds one-to-one with the horizontal drive electric cylinder 96 and the drive connecting plate 951 is fixed on the piston rod of the corresponding horizontal drive electric cylinder 96.

[0050] refer to Figure 1 and Figure 3 A sealing mechanism 55 is provided at the upper part of the gas-liquid separation chamber; the sealing mechanism 55 includes a pair of side sealing heads 552, a middle sealing head 554 and a pair of linkage components 553; the linkage components 553 correspond one-to-one with the side sealing heads 552 and the linkage components 553 are located between the side sealing heads 552 and the middle sealing heads 554 on the corresponding side; the first exhaust port 500 and the second exhaust port 501 are symmetrically arranged relative to the water outlet 502.

[0051] refer to Figure 1 and Figure 3The gas-liquid separation chamber has cuboid guide support plates 551 formed on the side walls near and away from the water pump motor 20, respectively; the side sealing head 552 includes a float plate 5521 and a side sealing head body disposed on the float plate 5521; the side sealing head body includes a plurality of vertical guide rods 5522 fixed on the upper end surface of the float plate 5521, a side sealing support plate 5523 fixed on the vertical guide rods 5522, and a cylindrical side sealing insert 5524 fixed on the upper end surface of the side sealing support plate 5523 that cooperates with the first exhaust hole 500 or the second exhaust hole 501; the size of the side sealing support plate 5523 is larger than the size of the side sealing insert 5524; the intermediate sealing head 554 includes an intermediate sealing support plate 5541 and a cylindrical intermediate sealing insert 5542 fixed on the intermediate sealing support plate 5541 that cooperates with the water outlet 502.

[0052] refer to Figure 1 and Figure 3 The linkage component 553 includes a telescopic guide sleeve 5532 rotatably connected between a pair of opposing side walls of the gas-liquid separation chamber, a lower telescopic plate 5531 hinged to the inner end of the float plate 5521, and an upper telescopic plate 5533 hinged to the lower end face of the intermediate closed support plate 5541; the telescopic mechanism of the lower telescopic plate 5531 is located at the lower end of the telescopic guide sleeve 5532; the telescopic mechanism of the upper telescopic plate 5533 is located at the upper end of the telescopic guide sleeve 5532.

[0053] When venting, a pair of side sealing heads 552 are at the bottom, and the middle sealing head 554 is at the top and blocks the outlet 502; when draining, a pair of side sealing heads 552 are at the top, and one side sealing head 552 blocks the first vent 500 and the other side sealing head 552 blocks the second vent 501, while the middle sealing head 554 is at the bottom.

[0054] The working principle of a self-priming pump for accelerating exhaust according to this application is as follows: initial state Figure 1As shown, at this time, the pair of side sealing heads 552 are at the bottom, and the middle sealing head 554 is at the top, blocking the outlet 502. Then, the second solenoid valve 102 and the first solenoid valve 99 are opened. Then, the water pump motor 20 drives the water pump shaft 30 to rotate, which directly drives the centrifugal impeller 40 to rotate. Through the rotation transmission assembly 94, the axial flow impeller 932 is driven to rotate. Thus, part of the air in the air inlet pipe enters the gas-liquid separation chamber through the second exhaust pipe 100, and the other part is separated in the gas-liquid separation chamber by the centrifugal impeller 40. Then, under the action of the axial flow impeller 932, it flows along the first exhaust pipe 902. 7. The discharged air cools the water pump motor 20 on the lower side. After the exhaust is completed, the liquid level in the gas-liquid separation chamber rises. During this process, a pair of float plates 5521 rise until a pair of side sealing heads 552 respectively seal the first exhaust port 500 and the second exhaust port 501. Then the second solenoid valve 102 and the first solenoid valve 99 close. Finally, the liquid is discharged along the outlet 502 and the outlet pipe 52. After the water is discharged, a pair of upper sealing plates 95 move away from each other, and the upper opening of the air guide tube 922 opens. In this way, the axial flow impeller 932 still generates airflow from top to bottom to cool the water pump motor 20.

[0055] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A self-priming pump for accelerating exhaust, comprising a support base plate (10), a water pump motor (20), a water pump shaft (30) connected to the output shaft of the water pump motor (20), a centrifugal impeller (40) coaxially fixed on the water pump shaft (30), and a hollow pump body (50); an outlet (502) is formed in the middle of the upper side wall of the pump body (50), and an inlet pipe is installed at the end away from the water pump motor (20); a volute (54) is formed on the side wall of the pump body (50) near the water pump motor (20); the centrifugal impeller (40) is located in the volute. Inside the casing (54); an inlet pipe (53) is formed inside the pump body (50); one end of the inlet pipe (53) is connected to the inlet pipe, and the other end is connected to the inlet of the volute (54); the space of the pump body (50) outside the volute (54) and the inlet pipe (53) is divided into an upper gas-liquid separation chamber and a lower liquid storage chamber; a reflux hole (540) is formed at the bottom of the volute (54), and the outlet is located in the gas-liquid separation chamber; through the reflux hole (540), the liquid storage chamber is connected to the internal space of the volute (54); characterized in that: It also includes an exhaust acceleration device (90) disposed on the support base plate (10); the upper side wall of the pump body (50) near the end of the water pump motor (20) is formed with a first exhaust hole (500) with openings at the top and bottom; the exhaust acceleration device (90) is connected to the gas-liquid separation chamber through the first exhaust hole (500); the exhaust acceleration device (90) is used to accelerate the discharge of the air separated in the gas-liquid separation chamber from the pump body (50). The exhaust acceleration device (90) includes a first exhaust pipe (97) and an exhaust drive mechanism; the exhaust drive mechanism includes a cylindrical air guide tube (922) with openings at the top and bottom, an airflow drive assembly (93) coaxially rotatably disposed in the air guide tube (922), and a rotation transmission assembly (94); the rotation transmission assembly (94) is used to connect the water pump shaft (30) and the airflow drive assembly (93); the water pump shaft (30) drives the airflow drive assembly (93) to rotate through the rotation transmission assembly (94); the airflow drive assembly (93) is used to generate airflow from top to bottom; one end of the first exhaust pipe (97) is connected to the upper end face of the pump body (50) and communicates with the first exhaust hole (500), and the other end is coaxially disposed directly above the air guide tube (922); a first solenoid valve (99) is disposed on the first exhaust pipe (97).

2. The self-priming pump for accelerating exhaust according to claim 1, characterized in that: The first exhaust pipe (97) has a coaxially arranged annular cylinder outlet pipe (971) formed at one end near the air guide cylinder (922); a pair of fan-shaped upper sealing plates (95) at an angle of 180 degrees are horizontally moved on the upper surface of the air guide cylinder (922); the outer diameter of the upper sealing plate (95) is larger than the outer diameter of the air guide cylinder (922); the air guide cylinder (922) is provided with a horizontal driving component; the horizontal driving component is used to drive the pair of upper sealing plates (95) to move closer or further away from each other; when the pair of upper sealing plates (95) move closer to each other, the inner cylindrical surface of the upper sealing plate (95) abuts against the outlet pipe (971).

3. A self-priming pump for accelerating exhaust according to claim 2, characterized in that: The cylindrical surface of the air outlet pipe (971) is formed with a coaxially arranged annular groove-shaped insertion groove (9710); the diameter of the insertion groove (9710) is the same as the inner diameter of the upper sealing plate (95).

4. A self-priming pump for accelerating exhaust according to claim 3, characterized in that: The lower end face of the upper sealing plate (95) is formed with a coaxially arranged semi-circular lower moving groove, and the diameter of the lower moving groove is the same as the outer diameter of the air guide tube (922).

5. A self-priming pump for accelerating exhaust according to claim 1, characterized in that: The air guide tube (922) is located directly above the water pump motor (20).

6. A self-priming pump for accelerating exhaust according to claim 1, characterized in that: It also includes a second exhaust pipe (100); the upper side wall of the pump body (50) away from the water pump motor (20) is formed with a second exhaust hole (501) with openings at the top and bottom; one end of the second exhaust pipe (100) is connected to the water inlet pipe and the other end is connected to the gas-liquid separation chamber through the second exhaust hole (501); a water inlet side check valve (101) is provided on the second exhaust pipe (100).

7. A self-priming pump for accelerating exhaust according to claim 6, characterized in that: The upper part of the gas-liquid separation chamber is provided with a sealing mechanism (55); the sealing mechanism (55) includes a pair of side sealing heads (552) and a middle sealing head (554); when venting, the first vent hole (500) and the second vent hole (501) are in the open state, and the middle sealing head (554) blocks the outlet (502); when draining, the outlet (502) is in the open state, one of the side sealing heads (552) blocks the first vent hole (500), and the other side sealing head (552) blocks the second vent hole (501).

8. A self-priming pump for accelerating exhaust according to claim 7, characterized in that: The first vent (500) and the second vent (501) are symmetrically arranged relative to the outlet (502); the sealing mechanism (55) further includes a pair of linkage components (553); the side sealing head (552) includes a float (5521) and a side sealing head body disposed on the float (5521); the float (5521) is vertically slidably disposed in the gas-liquid separation chamber; the side sealing head body is used to seal the first vent (500) or the second vent (501); the linkage component (553) includes a telescopic guide sleeve (5532) rotatably connected between a pair of opposing sidewalls of the gas-liquid separation chamber and a lower telescopic plate (5531) hinged to the inner end of the float (5521). The upper telescopic plate (5533) is hinged to the end face of the intermediate sealing head (554); the lower telescopic plate (5531) is telescopically disposed at the lower end of the telescopic guide sleeve (5532); the upper telescopic plate (5533) is telescopically disposed at the upper end of the telescopic guide sleeve (5532); when venting, a pair of the side sealing heads (552) are at the lowest end, the intermediate sealing head (554) is at the highest end and blocks the outlet (502); when draining, a pair of the side sealing heads (552) are at the highest end and one of the side sealing heads (552) blocks the first vent hole (500), the other side sealing head (552) blocks the second vent hole (501), and the intermediate sealing head (554) is at the lowest end.

9. A self-priming pump for accelerating exhaust according to claim 1, characterized in that: A filter assembly (80) is detachably installed on the water inlet pipe.

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