Long service life mine submersible sand pump

Abstract

The application relates to the technical field of submersible sand discharge pumps, in particular to a mine submersible sand discharge pump with long service life. The application comprises a pump body, the inside of the pump body is provided with a first impeller, the top of the pump body is fixedly provided with a connecting seat, the top of the connecting seat is fixedly provided with a motor for driving the first impeller to rotate, and the top of the pump body is provided with a sealing seat. Through the arrangement of the sand throwing disc, the accumulated silt under the sealing seat can be thrown out through the rotation of the arc-shaped plate, the direct contact of the silt with the sealing connection position of the sealing seat and the rotating rod is reduced, the silt is prevented from penetrating into the inside of the buffer space from the sealing connection position of the sealing seat and the rotating rod, a first protection barrier is formed, and the arc-shaped plate is also used for pushing the silt to move on the top of the screen mesh during the rotation. The large-particle silt generated through condensation can be scattered through the mesh holes of the screen mesh, so that the abrasion of the silt to the inner wall of the pump body is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of submersible sand drainage pump, and particularly relates to a mine submersible sand drainage pump with long service life. BACKGROUND

[0002] The mine submersible pump is mainly used for central pump room drainage of coal mines, rescue drainage or mine drainage after water disaster, and is commonly used centrifugal pump. The mine submersible pump commonly has D type, DA type and TSW type multi-stage centrifugal pump; and the well bottom water nest and local drainage of mining area commonly use B type, BA type and BZ type single-stage centrifugal pump, and there is also multi-stage centrifugal pump for higher lift.

[0003] A mine submersible sand drainage electric pump is disclosed in the patent with the publication number CN217582637U, and relates to the technical field of sand drainage electric pump; and the utility model discloses a sand drainage pump body, a sand drainage pipe is arranged at the upper end of the sand drainage pump body, a main shaft is arranged in the sand drainage pump body, a crushing device is in transmission connection with the main shaft, and an adjusting seat is fixedly connected outside the sand drainage pump body.

[0004] In the process of mining, a large amount of underground water, surface water and mine water will be generated, and these water has a large amount and contains certain silt impurities. In order to ensure the safety production of the mine, the accumulated water needs to be effectively drained in time. Since the silt in the water will penetrate into the connection between the sealing seat and the motor shaft in the process of using the submersible sand drainage pump to drain water, the sealing seat will be damaged, and then the silt and water will contact the motor, so that the motor is damaged. At the same time, the submersible sand drainage pump will be subjected to great vibration and be scoured by the sewage carrying hard particles when in use, so that the surface material of the flow part is seriously worn, and the service life of the pump is reduced. SUMMARY

[0005] The present application aims at solving the defects in the prior art that the silt in the water will penetrate into the connection between the sealing seat and the motor shaft in the process of using the submersible sand drainage pump to drain water, the sealing seat will be damaged, and then the silt and water will contact the motor, so that the motor is damaged. At the same time, the submersible sand drainage pump will be subjected to great vibration and be scoured by the sewage carrying hard particles when in use, so that the surface material of the flow part is seriously worn, and the service life of the pump is reduced, and proposes a mine submersible sand drainage pump with long service life.

[0006] To achieve the above object, the technical scheme adopted by the present application is as follows: a long-service-life mine submersible sand-discharging pump, comprising a pump body, a first impeller installed inside the pump body, a coupling seat fixed to the top of the pump body, a motor for driving the first impeller to rotate fixed to the top of the coupling seat, a sealing seat arranged on the top of the pump body, the sealing seat being used to block the silt inside the pump body from entering the internal space of the coupling seat, a sand-throwing disc arranged inside the pump body, the sand-throwing disc being used to throw the silt near the sealing seat out, thereby preventing the silt from directly contacting the sealing seat, and a sand-discharging assembly arranged inside the coupling seat, the sand-discharging assembly being used to discharge the silt on the inner wall of the sealing seat into the pump body.

[0007] In further embodiments, a pump cover is fixed to the top of the pump body, a sealing seat is fixed to the top of the pump cover, an output shaft of the motor is fixed with a rotating rod, one end of the rotating rod away from the motor is located inside the pump body, the first impeller is fixedly connected to the outer wall of the rotating rod, and the sealing seat is rotatably connected to the outer wall of the rotating rod.

[0008] In further embodiments, the sand-throwing disc comprises a fixing ring fixed to the outer wall of the rotating rod, a plurality of arc-shaped plates are fixed in a circumferential array on the outer wall of the fixing ring, a plurality of connecting blocks are fixed in a circumferential array on the inner wall of the pump cover, all the connecting blocks are fixed with a screen, the screen is rotatably connected to the outer wall of the rotating rod, the top of the screen abuts against the bottom of the arc-shaped plate, and the top of the arc-shaped plate abuts against the bottom of the sealing seat.

[0009] In further embodiments, the bottom of the screen is fixed with a plurality of L-shaped rods in a circumferential array, the outer wall of the rotating rod is fixed with straight rods symmetrically, and the ends of the two straight rods are fixed with buffer blocks.

[0010] In further embodiments, the sand-discharging assembly comprises a groove, the groove is formed in the top of the coupling seat, a gas bag is fixed inside the groove, an air inlet pipe is fixed to the outer side wall of the coupling seat, the air outlet end of the air inlet pipe penetrates through the outer wall of the coupling seat and is fixed in communication with the inside of the gas bag, an air outlet is formed in the inner wall of the coupling seat and is fixed in communication with the inside of the gas bag, the inside of the air outlet is provided with a first pressure relief valve, the inner wall of the coupling seat is fixed in communication with an air outlet pipe, and the inside of the air outlet pipe is provided with a second pressure relief valve.

[0011] In further embodiments, the outer wall of the rotating rod is fixed with a second impeller, a cavity is formed in the side wall of the coupling seat, a plurality of first openings are formed in a circumferential array at the bottom of the cavity, the first openings are in communication with the internal space of the coupling seat, a plurality of second openings are formed in a circumferential array on the side wall of the cavity, and the second openings are in communication with the internal space of the coupling seat.

[0012] In further embodiments, a first circular ring is fixed on the outer wall of the motor, a cavity is formed in the inside of the first circular ring, the gas outlet end of the gas outlet pipe penetrates through the bottom side wall of the first circular ring and is fixedly communicated with the inside of the cavity, a plurality of exhaust holes are formed in the top circumference of the first circular ring, and a one-way valve is arranged in the inside of each exhaust hole.

[0013] In further embodiments, a second circular ring is fixed on the outer wall of the motor, the end of the gas inlet pipe away from the air bag penetrates through the first circular ring and the second circular ring in sequence, and the inner side wall of the first circular ring is fixedly connected with the outer wall of the connecting seat.

[0014] In further embodiments, a feeding port is formed in the bottom of the pump body, a discharge pipe is fixed on one side of the pump body, a discharge port is formed in one end of the discharge pipe, a communicating port is formed in the inner wall of the pump body, and the discharge pipe and the inside of the pump body are communicated through the communicating port.

[0015] In further embodiments, a circular rod is fixed on the bottom end of the rotating rod, a plurality of stirring rods are fixed on the outer wall of the circular rod in a circumferential array, a disc is fixed on the inner wall of the feeding port, the disc is rotationally connected with the circular rod, a plurality of holes are formed in the top of the disc in a penetrating manner, and the disc is located above the stirring rods.

[0016] Compared with the prior art, the present application has the following beneficial effects:

[0017] 1、The sand throwing plate is arranged in the present application, in the process of rotating the first impeller to pump water by the rotating rod, the rotating rod also drives the fixed ring to rotate and further drives the arc-shaped plate to rotate, the arc-shaped plate rotating can throw the accumulated silt under the sealing seat, reduce the direct contact of the silt with the sealing connection part of the sealing seat and the rotating rod, thereby being beneficial to preventing the silt from penetrating into the inside of the buffer space from the sealing connection part of the sealing seat and the rotating rod, forming a first protective barrier, and the arc-shaped plate is also used for pushing the silt to move on the top of the screen mesh in the process of rotating, the large particle silt generated by condensation can be scattered through the mesh holes of the screen mesh, thereby being beneficial to reducing the abrasion of the silt to the inner wall of the pump body.

[0018] 2、The second impeller is arranged in the present application, the rotating rod drives the second impeller to rotate, the second impeller rotating makes the gas in the inside of the buffer space circulate and flow, being beneficial to heat dissipation of the rotating shaft of the motor, and the downward airflow generated by the rotation of the second impeller is also used for blowing the silt penetrating into the inside of the buffer space to the bottom of the buffer space, being beneficial to preventing the silt from contacting with the rotating shaft of the motor, thereby being beneficial to the motor forming a second protective barrier.

[0019] 3、The present application is through the setting of the sand discharge assembly, the airflow enters into the inside of the air bag from the air inlet pipe, the air bag inflation increases the sealing between the motor and the coupling seat, then the airflow passes through the first pressure relief valve into the buffer space from the air outlet, the entry of the airflow makes the air pressure in the buffer space rise, the internal air pressure of the buffer space rises after the buffer space is beneficial to prevent the external silt and water from the gap of the joint from seeping into the inside of the buffer space, further improve the sealing of the buffer space, the entry of the airflow can also accelerate the gas flow in the inside of the buffer space from top to bottom, promote the circulation of the airflow in the inside of the buffer space, beneficial to the heat dissipation of the motor shaft, the airflow passes through the second pressure relief valve and is discharged to the inside of the first circular ring, and then is discharged to the outside of the motor from the first circular ring, the water flow generated by the airflow discharge can heat dissipation of the motor shell. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is the overall structure schematic diagram of the present application;

[0021] Figure 2 It is the structure sectional view of the pump body of the present application;

[0022] Figure 3 It is the Figure 2 Structure enlarged view of A in the present application;

[0023] Figure 4 It is the structure sectional view of the coupling seat of the present application;

[0024] Figure 5 It is the Figure 4 Structure enlarged view of B in the present application;

[0025] Figure 6 It is the Figure 4 Structure enlarged view of C in the present application;

[0026] Figure 7 It is the internal structure sectional view of the pump body of the present application;

[0027] Figure 8 It is the Figure 7 Structure enlarged view of D in the present application.

[0028] In the figure: 1, motor; 2, rotating rod; 3, coupling seat; 4, pump body; 5, feed port; 6, discharge port; 7, communication port; 8, sealing seat; 9, pump cover; 10, first impeller; 11, disc; 12, opening; 13, round rod; 14, stirring rod; 15, fixed ring; 16, arc plate; 17, screen; 18, L-shaped rod; 19, straight rod; 20, buffer block; 21, second impeller; 22, cavity; 23, first opening; 24, second opening; 25, air inlet pipe; 26, air bag; 27, air outlet; 28, first pressure relief valve; 29, air outlet pipe; 30, second pressure relief valve; 31, first circular ring; 32, second circular ring; 33, check valve. DETAILED DESCRIPTION

[0029] The following description is used to disclose the present application so that those skilled in the art can implement the present application. The preferred embodiments in the following description are only as examples, and other obvious modifications can be thought of by those skilled in the art.

[0030] As Figures 1 to 8 shown in a kind of long service life mining submersible sand pump, the device includes pump body 4, first impeller 10 is installed in the inside of pump body 4, the top of pump body 4 is fixed with coupling seat 3, the top of coupling seat 3 is fixed with motor 1 for driving first impeller 10 rotation, the top of pump body 4 is provided with sealing seat 8, sealing seat 8 is used to block the silt in the inside of pump body 4 into the internal space of coupling seat 3, the inside of pump body 4 is provided with sand throwing disc, sand throwing disc is used to throw the silt near sealing seat 8, prevent silt from directly contacting with sealing seat 8, the inside of coupling seat 3 is provided with sand discharge assembly, sand discharge assembly is used to discharge the silt on the inner wall of sealing seat 8 into the inside of pump body 4.

[0031] In the specific implementation process, sand throwing disc is arranged at the bottom of sealing seat 8, the bottom of sealing seat 8 can be cleaned, the inner wall of pump body 4 is sprayed with epoxy diamond and polyurethane rubber, to enhance wear resistance, improve the service life of pump body 4.

[0032] It should be noted that: the mining submersible sand pump is used to transport mixed sewage containing silt, slag particles, fibers and other solid particles, the pump will be subjected to a huge vibration and the scouring of sewage carrying hard particles when in use, so that the surface material of flow component is severely worn.

[0033] Specifically, since the silt in the water will penetrate into the connection between sealing seat 8 and the rotating shaft of motor 1 during the use of the submersible sand pump for drainage, the sealing seat 8 will be damaged, and then the silt and water will contact with the motor 1, so that the motor 1 is damaged. At the same time, the submersible sand pump will be subjected to a huge vibration and the scouring of sewage carrying hard particles when in use, so that the surface material of flow component is severely worn, which reduces the service life of the pump.

[0034] The embodiment of the present application can solve the above problems, and the specific implementation is as follows: first, the staff places the submersible sand removal pump in the sewage inside the mine, and then starts the motor 1 to drive the first impeller 10 to rotate to pump out the sewage. The provided sand throwing plate can clean the bottom of the sealing seat 8, throw out the sand at the bottom of the sealing seat 8, and prevent the sand from contacting the sealing part of the sealing seat 8, thereby facilitating the reduction of damage of the sand to the sealing seat 8. At the same time, the sand throwing plate can also scatter the larger sand particles that are condensed together during the throwing process, thereby reducing the wear of the inner wall of the pump body 4 by the large particle sand and facilitating the improvement of the service life of the pump body 4.

[0035] The provided sand removal assembly can increase the air pressure inside the connecting seat 3. Under the action of high pressure, it is beneficial to block the sand from entering the inside of the connecting seat 3 from the gap of the sealing seat 8. Under the action of the thrust generated by high air pressure, the sand that seeps into the gap of the sealing seat 8 can be pushed into the inside of the pump body 4, further increasing the sealing performance of the sealing seat 8, and facilitating the prevention of the sand from entering the inside of the connecting seat 3 to cause damage to the motor 1.

[0036] In the further implementation process, the top of the pump body 4 is fixed with a pump cover 9, the top of the pump cover 9 is fixed with a sealing seat 8, the output shaft of the motor 1 is fixed with a rotating rod 2, the end of the rotating rod 2 away from the motor 1 is located inside the pump body 4, the first impeller 10 is fixedly connected to the outer wall of the rotating rod 2, and the sealing seat 8 is rotatably and sealingly connected to the outer wall of the rotating rod 2.

[0037] In the specific implementation process, the inner walls of the pump body 4 and the pump cover 9 are sprayed with epoxy diamond and polyurethane rubber to enhance wear resistance.

[0038] Rotary sealing belongs to a kind of dynamic sealing and is prior art, which will not be described here.

[0039] Specifically, the motor 1 drives the rotating rod 2 to rotate, and the rotating rod 2 drives the first impeller 10 to rotate to suck the sewage. In the rotating process of the first impeller 10, the top side wall of the first impeller 10 and the bottom side wall of the pump cover 9 are filled with sand, and the bottom of the first impeller 10 and the inner wall of the pump body 4 are filled with sand, which are more severely worn. By spraying epoxy diamond and polyurethane rubber on the inner walls of the pump body 4 and the pump cover 9, the wear resistance of the inner walls of the pump body 4 and the pump cover 9 can be increased, thereby facilitating the extension of the service life of the device. The provided sand throwing plate can prevent the sand from entering the sealing connection between the sealing seat 8 and the rotating rod 2, thereby facilitating the prevention of the sand from entering the inside of the connecting seat 3.

[0040] In the further implementation process, the sand throwing device comprises a fixed ring 15 fixed on the outer wall of the rotating rod 2, a plurality of arc-shaped plates 16 are circumferentially fixed on the outer wall of the fixed ring 15, a plurality of connecting blocks are circumferentially fixed on the inner wall of the pump cover 9, all the connecting blocks are jointly fixed with a screen 17, the screen 17 is rotationally connected with the outer wall of the rotating rod 2, the top of the screen 17 abuts against the bottom of the arc-shaped plate 16, and the top of the arc-shaped plate 16 abuts against the bottom of the sealing seat 8.

[0041] Specifically, the motor 1 drives the rotating rod 2 to rotate, the rotating rod 2 drives the fixed ring 15 to rotate, the fixed ring 15 drives the plurality of arc-shaped plates 16 to rotate synchronously, the arc-shaped plates 16 push the mud and sand at the bottom of the sealing seat 8 to the periphery by using the outer wall in the rotating process, and the mud and sand entering the bottom of the sealing seat 8 can be thrown out in the high-speed rotating process of the arc-shaped plates 16, so that the contact between the sealing connection position of the sealing seat 8 and the rotating rod 2 and the mud and sand is reduced, and the damage of the mud and sand to the sealing seat 8 is reduced.

[0042] In the rotating process of the arc-shaped plate 16, the bottom of the arc-shaped plate 16 abuts against the top of the screen 17, the arc-shaped plate 16 pushes the mud and sand to move on the top of the screen 17, the screen 17 can scatter the mud and sand with large particles, and the abrasion of the mud and sand to the inner wall of the pump body 4 in the moving process of the mud and sand in the pump body 4 is reduced.

[0043] In the further implementation process, the bottom of the screen 17 is circumferentially fixed with a plurality of L-shaped rods 18, the outer wall of the rotating rod 2 is symmetrically fixed with straight rods 19, and the ends of the two straight rods 19 are fixed with buffer blocks 20.

[0044] In the specific implementation process, the horizontal rod end of the L-shaped rod 18 is located below the straight rod 19, and the horizontal rod end of the L-shaped rod 18 abuts against the straight rod 19.

[0045] Specifically, the rotating rod 2 drives the two straight rods 19 to rotate synchronously, the two straight rods 19 drive the corresponding buffer blocks 20 to rotate respectively, the buffer blocks 20 abut against the horizontal rod end of the L-shaped rod 18 in the rotating process of the two straight rods 19, the L-shaped rod 18 is driven to move downward, the L-shaped rod 18 drives the screen 17 to be concave downward, the screen 17 is reset to drive the L-shaped rod 18 to move upward and reset after the buffer blocks 20 and the L-shaped rod 18 are separated, the mud and sand blocked in the mesh of the screen 17 can be shaken off through the reciprocating vibration of the screen 17, and the mesh of the screen 17 is cleaned.

[0046] During the rebounding process of the screen 17 from the concave state, the screen 17 can extrude the silt located on the top of the screen 17 with the bottom of the arc-shaped plate 16, the bottom of the arc-shaped plate 16 can extrude the silt to make the silt pass through the mesh of the screen 17, which is beneficial to scatter the silt with large particles into small particles, and further reduces the abrasion of the silt to the inner wall of the pump body 4.

[0047] In a further implementation process, the desilting assembly comprises a groove, the groove is arranged on the top of the connecting seat 3, the air bag 26 is fixed in the groove, the air inlet pipe 25 is fixed on the outer wall of the connecting seat 3, the air outlet end of the air inlet pipe 25 penetrates through the outer wall of the connecting seat 3 and is fixed in communication with the inside of the air bag 26, the air outlet 27 is arranged on the inner wall of the connecting seat 3 and is fixed in communication with the inside of the air bag 26, the first pressure relief valve 28 is arranged in the air outlet 27, the air outlet pipe 29 is fixed in communication with the inner wall of the connecting seat 3, and the second pressure relief valve 30 is arranged in the air outlet pipe 29.

[0048] In a specific implementation process, the air inlet end of the air inlet pipe 25 is fixed in communication with the external air pump, the top of the connecting seat 3 is fixedly connected with the outer wall of the motor 1, the side wall of the air bag 26 extends out of the groove and abuts against the side wall of the motor 1, and the air outlet end of the air outlet pipe 29 is located outside the motor 1.

[0049] The connecting seat 3 is in sealing connection with the motor 1, the connecting seat 3 is in sealing connection with the pump body 4, the pump body 4 is in sealing connection with the pump cover 9, the pump cover 9 is in sealing connection with the sealing seat 8, the sealing seat 8 is in rotary sealing connection with the rotating rod 2, and the connecting seat 3, the motor 1, the pump cover 9 and the sealing seat 8 form a buffer space.

[0050] Specifically, the air pump inflates the inside of the air inlet pipe 25, the airflow enters the inside of the air bag 26 from the air outlet end of the air inlet pipe 25, the air pressure in the inside of the air bag 26 rises to make the air bag 26 expand, so that the air bag 26 abuts against the motor 1 more tightly, which is beneficial to increase the sealing property between the connecting seat 3 and the motor 1.

[0051] When the air pressure in the inside of the air bag 26 is greater than the set value of the first pressure relief valve 28, the airflow passes through the air outlet 27 from the inside of the air bag 26 into the buffer space, so that the air pressure in the buffer space rises, and the gas in the buffer space has a tendency to move outward under the action of the high air pressure, the airflow blows into the inside of the pump body 4 along the gap between the sealing seat 8 and the rotating rod 2, so that the silt infiltrated into the gap between the sealing seat 8 and the rotating rod 2 can be blown out into the inside of the pump body 4, which further blocks the silt from entering the buffer space, at the same time, the air pressure in the buffer space rises, the airflow can prevent the external water from infiltrating into the buffer space through the gap, which further increases the sealing property between the motor 1 and the connecting seat 3.

[0052] The air flow forms an air flow from top to bottom in the buffer space, which is beneficial to heat dissipation of the bearing of the motor 1, and when the air pressure in the buffer space is greater than the set value of the second pressure relief valve 30, the gas is discharged from the gas outlet end of the gas outlet pipe 29, and the discharged gas can drive the water flow near the motor 1 shell to flow, thereby accelerating the heat dissipation of the motor 1 shell by the water flow.

[0053] In a further implementation process, the outer wall of the rotating rod 2 is fixed with a second impeller 21, a cavity 22 is arranged in the side wall of the connecting seat 3, a plurality of first openings 23 are arranged in the bottom of the cavity 22 in a circumferential array, the first openings 23 are in communication with the inner space of the connecting seat 3, and a plurality of second openings 24 are arranged in the side wall of the cavity 22 in a circumferential array, the second openings 24 are in communication with the inner space of the connecting seat 3.

[0054] In a specific implementation process, the second impeller 21 is located in the inside of the buffer space.

[0055] Specifically, the rotating rod 2 drives the second impeller 21 to rotate, the second impeller 21 can push the air flow to move from top to bottom, and the speed of the air flow moving from top to bottom is increased, the gas below the second impeller 21 enters the cavity 22 through the first openings 23, and then returns to the upper side of the second impeller 21 in the buffer space from the second openings 24, and the heat dissipation of the bearing of the motor 1 is accelerated through the circulation of the air flow.

[0056] The air flow generated by the rotation of the second impeller 21 can make part of the silt entering the buffer space move downward and always stay at the bottom of the buffer space, forming a second protective barrier to avoid the silt contacting the motor 1 and causing damage to the motor 1.

[0057] In a further implementation process, a first ring 31 is fixed on the outer wall of the motor 1, a cavity is arranged in the inside of the first ring 31, the gas outlet end of the gas outlet pipe 29 penetrates through the bottom side wall of the first ring 31 and is fixedly communicated with the inside of the cavity, a plurality of exhaust holes are arranged in the top of the first ring 31 in a circumferential array, and a one-way valve 33 is arranged in the inside of each exhaust hole.

[0058] In a specific implementation process, all the exhaust holes are distributed in a circumferential array outside the motor 1, through the one-way valve 33, the air flow can pass through the exhaust holes from the inside of the first ring 31 to the outside, and the water flow outside cannot pass through the one-way valve 33 to enter the inside of the first ring 31.

[0059] Specifically, the air flow discharged from the air outlet pipe 29 enters the inner chamber of the first ring 31, and then is discharged to the outside along the plurality of air exhaust holes opened on the top of the first ring 31. The discharge of the air flow causes the flow of the water flow, thereby flushing the shell of the motor 1 and accelerating the heat dissipation of the motor 1. Through the plurality of air exhaust holes, the heat dissipation of the outer wall of the motor 1 is facilitated.

[0060] In further implementation, the second ring 32 is fixed on the outer wall of the motor 1, and the air inlet pipe 25 penetrates the first ring 31 and the second ring 32 in sequence from the end away from the air bag 26. The inner side wall of the first ring 31 is fixedly connected with the outer wall of the coupling seat 3.

[0061] In specific implementation, the air inlet pipe 25 penetrates and is fixedly connected with the first ring 31 and the second ring 32.

[0062] Specifically, through the second ring 32, after the submersible sand pump is tilted on the water bottom, the first ring 31 and the second ring 32 can play a supporting role to prevent the submersible sand pump from sinking into the silt, thereby causing poor heat dissipation of the motor 1. The outer wall of the first ring 31, the second ring 32 and the pump body 4 can transversely support the submersible sand pump.

[0063] The first ring 31 and the second ring 32 have a fixing effect on the air inlet pipe 25, which is conducive to preventing loosening of the connection between the air inlet pipe 25 and the coupling seat 3.

[0064] The upper half of the inner side wall of the first ring 31 is fixedly connected with the outer wall of the motor 1, and the lower half of the inner side wall of the first ring 31 is fixedly connected with the outer wall of the coupling seat 3. Therefore, the first ring 31 can seal the connection position of the motor 1 and the coupling seat 3, further enhancing the sealing between the motor 1 and the coupling seat 3.

[0065] In further implementation, the pump body 4 is provided with a feeding port 5 at the bottom, and a discharge pipe is fixed to one side of the pump body 4. The discharge pipe is provided with a discharge port 6 at one end, and a communication port 7 is opened on the inner wall of the pump body 4. The discharge pipe and the interior of the pump body 4 are communicated through the communication port 7.

[0066] Specifically, during the rotation of the first impeller 10, sewage enters the interior of the pump body 4 from the feeding port 5. Through the delivery of the first impeller 10, the sewage enters the discharge pipe from the communication port 7, and finally enters the external delivery pipe from the discharge port 6 to deliver the sewage to the designated position.

[0067] In the further implementation process, the bottom end of the rotating rod 2 is fixed with a round rod 13, a plurality of stirring rods 14 are fixed on the outer wall of the round rod 13 in a circumferential array, a disc 11 is fixed on the inner wall of the feed inlet 5, the disc 11 is rotatably connected with the round rod 13, a plurality of openings 12 are formed through the top of the disc 11, and the disc 11 is located above the stirring rods 14.

[0068] It should be noted that, since the sewage contains large stones and weeds and other impurities, it is easy to cause blockage in the interior of the pump body 4 and increase the wear of the pump body 4.

[0069] Specifically, in the process of rotating the first impeller 10 to draw the sewage from the feed inlet 5 into the pump body 4, the rotating rod 2 drives the round rod 13 to rotate, and the round rod 13 drives the plurality of stirring rods 14 to rotate synchronously, so that the large impurity particles can be dispersed, thereby reducing the wear of the pump body 4. Through the provided disc 11, the large stones can be filtered, and the large impurity particles are prevented from entering the interior of the pump body 4. The stirring rods 14 are also used to shake off the impurities accumulated at the bottom of the disc 11 during the rotation and dispersion of the large particles, so as to prevent the large particles from blocking the openings 12 on the disc 11.

[0070] Working principle of the present application:

[0071] In use, first, the staff starts the motor 1 to drive the rotating rod 2 to rotate, the rotating rod 2 drives the first impeller 10 to rotate to draw the sewage at the bottom of the water into the interior of the pump body 4, and then from the discharge outlet 6 into the conveying pipe to be conveyed to the designated position. In the interior of the feed inlet 5, the rotating rod 2 drives the round rod 13 to rotate, and the round rod 13 drives the stirring rods 14 to rotate, so that the large particle silt impurities can be dispersed, and the large particle silt impurities are prevented from entering the interior of the pump body 4 to cause large wear of the pump body 4. At the same time, the stirring rods 14 can shake off the impurities at the disc 11 to prevent the openings 12 on the disc 11 from being blocked.

[0072] In the process of rotating the first impeller 10 to pump water by the rotating rod 2, the rotating rod 2 also drives the fixed ring 15 to rotate and further drives the arc-shaped plate 16 to rotate. The rotation of the arc-shaped plate 16 can throw the accumulated silt below the sealing seat 8 out, reducing the direct contact of the silt with the sealing connection between the sealing seat 8 and the rotating rod 2, thereby facilitating the prevention of the silt from penetrating into the inside of the buffer space from the sealing connection between the sealing seat 8 and the rotating rod 2, forming a first protective barrier. The external air pump inflates the inside of the buffer space through the air inlet pipe 25, so that the air pressure in the buffer space is increased. The gas in the buffer space flows into the inside of the pump body 4 along the sealing connection between the sealing seat 8 and the rotating rod 2 under the action of high air pressure, which can blow the silt that has penetrated into the sealing connection between the sealing seat 8 and the rotating rod 2 out, further preventing the silt from entering the inside of the buffer space from the sealing connection between the sealing seat 8 and the rotating rod 2, and thereby preventing the silt from damaging the sealing seat 8.

[0073] The arc-shaped plate 16 also serves to push the silt to move on the top of the screen 17 during rotation. The large particles of silt that are condensed can be dispersed through the mesh holes of the screen 17, thereby facilitating the reduction of the wear of the inner wall of the pump body 4 by the silt. The arc-shaped plate 16 can also scrape the silt adhering to the bottom of the sealing seat 8, which is conducive to reducing the corrosion of the sealing seat 8 by the silt.

[0074] The rotating rod 2 drives the straight rod 19 to rotate, which pushes the L-shaped rod 18 to move during rotation, thereby causing the screen 17 to vibrate. The reciprocating vibration of the screen 17 can shake off the silt clogged in the mesh holes of the screen 17, which is conducive to the dredging of the mesh holes of the screen 17. Meanwhile, the silt on the top of the screen 17 is extruded by the bottom of the arc-shaped plate 16 during the process of the screen 17 recovering from the concave state to the horizontal state. The silt particles pass through the mesh holes under the extrusion of the arc-shaped plate 16, which plays a role in dispersing the silt particles, further promoting the dispersion of large particles of silt, thereby facilitating the reduction of the wear of the inner wall of the pump body 4 by the silt.

[0075] The rotating rod 2 drives the second impeller 21 to rotate, which causes the gas in the buffer space to circulate and flow, which is conducive to heat dissipation of the rotating shaft of the motor 1. The downward airflow generated by the rotation of the second impeller 21 also serves to blow the silt that has penetrated into the inside of the buffer space to the bottom of the buffer space, which is conducive to preventing the silt from contacting the rotating shaft of the motor 1, thereby facilitating the formation of a second protective barrier for the motor 1.

[0076] Through the setting of the sand discharging assembly, the airflow enters into the inside of the air bag 26 from the air inlet pipe 25, the air bag 26 expands to increase the sealing between the motor 1 and the connecting seat 3, then the airflow enters into the buffer space from the air outlet 27 through the first pressure relief valve 28, the entering of the airflow increases the air pressure in the buffer space, after the air pressure in the buffer space increases, it is beneficial to prevent the external mud and water from seeping into the inside of the buffer space from the gap of the connecting part, further improves the sealing of the buffer space, the entering of the airflow can also promote the airflow to flow from top to bottom in the inside of the buffer space, accelerates the circulating flow of the airflow in the inside of the buffer space, is beneficial to heat dissipation of the rotating shaft of the motor 1, the airflow passes through the second pressure relief valve 30 and is discharged to the inside of the first circular ring 31, then is discharged to the outside of the motor 1 from the first circular ring 31, the water flow generated by the discharge of the airflow can heat the shell of the motor 1.

[0077] The basic principle, main features and advantages of the present application are shown and described above. It should be understood by those skilled in the art that the present application is not limited by the above embodiments, the above embodiments and the description in the specification are only the principles of the present application, various changes and improvements can be made to the present application without departing from the spirit and scope of the present application, and these changes and improvements all fall within the scope of the claimed present application.

Claims

1. A submersible sand pump for mining with a long service life, comprising a pump body (4), characterized in that: A first impeller (10) is installed inside the pump body (4), a connecting seat (3) is fixed on the top of the pump body (4), a motor (1) for driving the first impeller (10) to rotate is fixed on the top of the connecting seat (3), a sealing seat (8) is provided on the top of the pump body (4), the sealing seat (8) is used to prevent the mud and sand inside the pump body (4) from entering the internal space of the connecting seat (3), a sand throwing tray is provided inside the pump body (4), the sand throwing tray is used to throw out the mud and sand near the sealing seat (8) to prevent the mud and sand from directly contacting the sealing seat (8), a sand discharge assembly is provided inside the connecting seat (3), the sand discharge assembly is used to discharge the mud and sand on the inner wall of the sealing seat (8) into the interior of the pump body (4); a pump cover (9) is fixed on the top of the pump body (4), the sealing seat (8) is fixed on the top of the pump cover (9), The output shaft of the motor (1) is fixed with a rotating rod (2), and one end of the rotating rod (2) away from the motor (1) is located inside the pump body (4). The first impeller (10) is fixedly connected to the outer wall of the rotating rod (2), and the sealing seat (8) is rotatably sealed with the outer wall of the rotating rod (2); the sand throwing table includes a fixed ring (15), the fixed ring (15) is fixed to the outer wall of the rotating rod (2), a plurality of arc plates (16) are fixed in a circumferential array on the outer wall of the fixed ring (15), a plurality of connecting blocks are fixed in a circumferential array on the inner wall of the pump cover (9), and all the connecting blocks are fixed with a screen (17) in common, the screen (17) is rotatably connected to the outer wall of the rotating rod (2), the top of the screen (17) abuts against the bottom of the arc plate (16), and the top of the arc plate (16) abuts against the bottom of the sealing seat (8).

2. A submersible sand pump for mining with a long service life according to claim 1, characterized in that: A plurality of L-shaped rods (18) are fixed in a circumferential array at the bottom of the screen (17), and straight rods (19) are symmetrically fixed on the outer wall of the rotating rod (2), with buffer blocks (20) fixed at the ends of the two straight rods (19).

3. A submersible sand pump for mining with a long service life according to claim 1, characterized in that: The sand discharge assembly includes a groove, which is provided at the top of the connecting seat (3), an air bag (26) is fixed inside the groove, an air inlet pipe (25) is fixed on the outer wall of the connecting seat (3), an air outlet end of the air inlet pipe (25) passes through the outer wall of the connecting seat (3) and is fixedly connected to the interior of the air bag (26), an air outlet (27) is provided on the inner wall of the connecting seat (3), the air outlet (27) is fixedly connected to the interior of the air bag (26), a first pressure relief valve (28) is provided inside the air outlet (27), an air outlet pipe (29) is fixedly connected to the inner wall of the connecting seat (3), and a second pressure relief valve (30) is provided inside the air outlet pipe (29).

4. A submersible sand pump for mining with a long service life according to claim 3, characterized in that: A second impeller (21) is fixed on the outer wall of the rotating rod (2), a cavity (22) is provided inside the side wall of the connecting seat (3), a plurality of first openings (23) are provided in a circumferential array at the bottom of the cavity (22), and the first openings (23) are communicated with the internal space of the connecting seat (3), and a plurality of second openings (24) are provided in a circumferential array on the side wall of the cavity (22), and the second openings (24) are communicated with the internal space of the connecting seat (3).

5. A submersible sand pump for mining with a long service life according to claim 4, characterized in that: A first circular ring (31) is fixed on the outer wall of the motor (1), a chamber is provided inside the first circular ring (31), an outlet end of the outlet pipe (29) passes through the bottom side wall of the first circular ring (31) and is fixedly connected to the interior of the chamber, a plurality of exhaust holes are provided in a circumferential array on the top of the first circular ring (31), and a one-way valve (33) is provided inside all the exhaust holes.

6. A submersible sand pump for mining with a long service life according to claim 5, characterized in that: A second circular ring (32) is fixed on the outer wall of the motor (1), and an end of the air intake pipe (25) away from the air bag (26) passes through the first circular ring (31) and the second circular ring (32) in sequence, and the inner side wall of the first circular ring (31) is fixedly connected to the outer wall of the connecting seat (3).

7. A submersible sand pump for mining with a long service life according to claim 1, characterized in that: The bottom of the pump body (4) is provided with a feed port (5), a discharge pipe is fixed on one side of the pump body (4), one end of the discharge pipe is provided with a discharge port (6), and a communication port (7) is provided on the inner wall of the pump body (4), and the discharge pipe and the interior of the pump body (4) are connected through the communication port (7).

8. A submersible sand pump for mining with a long service life according to claim 7, characterized in that: A round rod (13) is fixed to the bottom end of the rotating rod (2), and a plurality of stirring rods (14) are fixed in a circular array on the outer wall of the round rod (13). A disc (11) is fixed on the inner wall of the feed port (5), and the disc (11) is rotatably connected to the round rod (13). A plurality of openings (12) are formed through the top of the disc (11), and the disc (11) is located above the stirring rod (14).

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