Shield pump with flushing structure

Abstract

The invention relates to the technical field of shield pumps, and discloses a shield pump with a flushing structure, which comprises a base, a pump body, a drainage end, a water inlet end, a main shaft, a motor rotor assembly, a motor stator assembly, a circulating pipe and a filter screen arranged in the circulating pipe, the circulating pipe comprises a first pipeline with one end communicated with the drainage end and a second pipeline with one end communicated with the base, the first pipeline is provided with a filter pipe allowing the filter screen to be placed therein, a flushing assembly used for pressing liquid into the first pipeline is arranged between the first pipeline and the second pipeline, an electromagnetic valve is arranged at the end, away from the flushing assembly, of the first pipeline, and a drain pipe is arranged at the position, between the filter screen and the electromagnetic valve, of the filter pipe. A pressure plug used for plugging the upper end of the discharge pipe is arranged on the discharge pipe, and a transmission part used for opening the pressure plug upwards when the flushing assembly presses liquid into the first pipeline is arranged between the pressure plug and the flushing assembly.

Description

Technical Field

[0001] The invention belongs to the technical field of shielded pumps, and in particular relates to a shielded pump with a flushing structure. Background Art

[0002] The drive of ordinary centrifugal pumps is to connect the impeller shaft of the pump with the electric shaft through a coupling, so that the impeller rotates with the motor to work. The canned pump is a sealless pump. The pump and the drive motor are sealed in a pressure vessel filled with pumping medium. This pressure vessel has only static seals, and a wire group is used to provide a rotating magnetic field and drive the rotor. This structure eliminates the rotating shaft sealing device of traditional centrifugal pumps, so it can be completely leak-free.

[0003] At present, a Chinese patent with publication number CN217206908U and publication date August 16, 2022 discloses a circulating shielded pump, including a pump body with a water inlet, a water outlet and an impeller unit, and a motor body connected to the pump body and with a motor shaft, and the motor shaft is connected to the motor through a bearing, the impeller unit is arranged on the motor shaft, the motor body is composed of a casing, a stator and rotor assembly, the casing is composed of a left connecting end cover, a right connecting end cover and a shell, the left connecting end cover, the right connecting end cover and the shell cooperate with the bearing to form a shell cavity for installing the stator and rotor assembly, and a circulation loop is formed between the pump body and the right connecting end cover. A circulation pipe for buffering axial force, one end of which is connected to the water outlet in the pump body, and the other end of which is connected to the right end face of the right connecting end cover. A mounting hole for the left connecting end cover to be inserted into and installed is provided on the end face of the pump body at the connection with the left connecting end cover. A convex ring portion which protrudes axially outward and extends into the pump body is provided at the left end of the left connecting end cover at the mounting hole, and a gap is left between the convex ring portion and the motor shaft. A T-shaped groove with a T-shaped cross-section and connecting the circulation pipe with the shell cavity is provided on the right end portion of the motor shaft, and an I-shaped groove with an I-shaped cross-section and connecting the shell cavity with the inside of the pump body is provided on the left end portion of the motor shaft.

[0004] This type of circulating shielded pump utilizes a circulating pipe to connect with the water outlet, so that the water is sent into the motor body through the circulating pipe. In the prior art, in order to prevent impurities from entering the motor body and affecting the use of the stator and rotor assemblies, a filter needs to be added to the circulating pipe. However, when the filter filters the impurities, the impurities will clog the mesh of the filter. Therefore, the surface of the filter needs to be cleaned of impurities at regular intervals, which ultimately makes the entire cleaning process very time-consuming and labor-intensive. Summary of the invention

[0005] The object of the present invention is to provide a shielded pump with a flushing structure, which can flush impurities on a filter screen, thereby achieving timely cleaning of the impurities on the filter screen.

[0006] The above technical objectives of the present invention are achieved through the following technical solutions: a shielded pump with a flushing structure, comprising a base, a pump body arranged at one end of the base and having an impeller inside, a drainage end arranged on the upper side of the pump body, a water inlet end arranged on the side of the pump body away from the base, a main shaft rotatably connected to the base, a motor rotor assembly located on the peripheral side of the main shaft, a motor stator assembly located on the peripheral side of the motor rotor assembly, a circulation pipe connected to the drainage end at one end and connected to the inside of the base at the other end, and a filter screen arranged in the circulation pipe, wherein the circulation pipe includes a first pipeline connected to the drainage end at one end, a first pipeline connected to the drainage end at one end, and a first pipeline connected to the drainage end at the other end. A second pipeline is connected to the base at one end, a filter tube for inserting a filter screen is arranged on the first pipeline, a flushing assembly for pressing liquid into the first pipeline is arranged between the first pipeline and the second pipeline, a solenoid valve is arranged at one end of the first pipeline away from the flushing assembly, a drain pipe is arranged on the filter tube and between the filter screen and the solenoid valve, a pressure plug for sealing the upper end of the drain pipe is arranged on the drain pipe, and a transmission member for opening the pressure plug upwards when the flushing assembly presses liquid into the first pipeline is arranged between the pressure plug and the flushing assembly.

[0007] By adopting the above technical solution, when the filter in the filter tube has been filtering for a period of time, the solenoid valve is first used to close the liquid inlet of the first pipeline, and then the flushing component can press liquid into the first pipeline, and the liquid can be flushed into the filter tube, thereby reversely flushing the filter, and impurities blocked in the mesh of the filter can be flushed down. At the same time, the pressure plug is opened upward by the transmission part, and then the impurities flushed down can be discharged along the discharge pipe with the liquid, and finally the impurities on the filter can be flushed, thereby achieving timely cleaning of the impurities on the filter.

[0008] The present invention is further configured as follows: the flushing assembly includes a flushing pipe whose end face at one end is connected to the first pipeline and whose side wall at the other end is connected to the second pipeline, a piston plate arranged in the flushing pipe, a driving column whose one end is connected to the piston plate and whose other end passes through the end face of the flushing pipe, a fixing plate arranged at the end of the driving column away from the piston plate, and a driving cylinder arranged on the upper side of the flushing pipe and whose piston rod is connected to the fixing plate.

[0009] By adopting the above technical solution, when it is necessary to use the flushing assembly to press liquid into the first pipeline, the piston rod of the driving cylinder is connected to the fixed plate. After the piston rod of the driving cylinder is contracted, the piston plate can be driven by the fixed plate and the driving column to move in the flushing pipe toward one end close to the first pipeline. At this time, the piston plate can press the liquid in the flushing pipe into the first pipeline, and the liquid can be flushed into the filter tube.

[0010] The present invention is further configured as follows: connecting ears are provided on both sides of the pressure plug, guide columns extending in a vertical downward direction are provided on the lower side of the connecting ears, guide sleeves for the guide columns to pass through are provided on the outer walls on both sides of the drain pipe, a connecting ring sleeved on the drain pipe is provided between the lower ends of the two guide columns, and the lower end of the guide column is sleeved with a pressure spring whose lower end is connected to the connecting ring and whose upper end is connected to the guide sleeve.

[0011] By adopting the above technical solution, the pressure plug utilizes the guide column on the connecting ear to pass through the guide sleeve, and the lower end of the pressure spring is connected to the connecting ring and the upper end is connected to the guide sleeve. At this time, the pressure plug can be pressed into the upper end of the discharge pipe under the action of the elastic restoring force of the pressure spring, thereby sealing the upper end of the discharge pipe through the pressure plug to ensure the stable flow of liquid in the circulation pipe.

[0012] The present invention is further configured as follows: the transmission member includes a connecting rod with one end connected to the fixed plate and extending toward a side close to the filter tube, an extension plate arranged on one side of the connecting ring, a wedge block arranged on the lower side of the extension plate, and a guide slope opened at one end of the connecting rod away from the fixed plate and used to abut against the wedge block to drive the extension plate to move upward.

[0013] By adopting the above technical solution, when the piston rod of the driving cylinder contracts, the fixed plate moves toward the side close to the first pipeline. At this time, the fixed plate can drive the connecting rod to move toward the side close to the connecting ring. Then, the guiding slope at the end of the connecting rod can abut against the wedge block on the lower side of the extension plate. The guiding slope can generate an upward force on the wedge block, and then the pressure plug can be driven to move upward to open the discharge pipe.

[0014] The present invention is further configured as follows: the connecting rod includes a first rod body having one end connected to a fixed plate, a second rod body having one end connected to an end of the first rod body away from the fixed plate, and a third rod body having one end connected to an end of the second rod body away from the first rod body; a guide tube for the second rod body to pass through is provided on the side wall of the driving cylinder.

[0015] By adopting the above technical solution, the connecting rod includes a first rod body, a second rod body and a third rod body, and the guide tube on the side wall of the cylinder is driven to allow the second rod body to pass through. At this time, the guide tube can guide the movement of the connecting rod, which is beneficial to the stable movement of the connecting rod.

[0016] The present invention is further configured as follows: a heat dissipation pipe extending in an S shape is provided on the first pipeline and between the filter pipe and the flushing pipe, and an axial flow fan located above the heat dissipation pipe and exhausting air downward is provided on the driving cylinder.

[0017] By adopting the above technical scheme, an S-shaped heat dissipation pipe is arranged on the first pipeline and between the filter pipe and the flushing pipe, and an axial flow fan is arranged on the driving cylinder and is located above the heat dissipation pipe and exhausts air downward. The airflow discharged downward by the axial flow fan can dissipate heat for the heat dissipation pipe, and the airflow discharged downward by the axial flow fan will also pass through the base. At this time, the circulation pipe and the base can be cooled by the axial flow fan at the same time, which is beneficial to the stable operation of the main shaft and motor rotor assembly in the base.

[0018] The present invention is further configured as follows: a guide slope is provided on the circumferential side of the pressure plug, a guide hood is provided on the circumferential side of the lower end of the axial flow fan, the guide hood is opened downward and is used to receive the liquid sprayed along the guide slope, and a linkage component is provided on the upper side of the driving cylinder for moving the axial flow fan to the top of the discharge pipe before the pressure plug is opened.

[0019] By adopting the above technical scheme, before the pressure plug is opened, the axial flow fan is first moved to the upper position of the discharge pipe by using the linkage assembly, wherein the liquid discharged upward in the discharge pipe will fly toward the side of the air guide cover along the guide slope of the pressure plug, and when the liquid is shot on the air guide cover, the liquid can fall back downward under the blocking and guiding effect of the air guide cover; at the same time, the falling liquid can fall on the outer wall of the base, and the airflow provided by the axial flow fan can be sprayed on the outer wall of the base. At this time, the liquid on the base can evaporate under the action of the airflow spray and take away the heat from the surface of the base, and finally the liquid discharged from the discharge pipe can be used to dissipate heat from the surface of the base.

[0020] The present invention is further configured as follows: the linkage assembly includes a connecting seat arranged on the upper side of the driving cylinder, a sliding seat slidably connected to the connecting seat, a connecting rod connected to the sliding seat at one end and to the axial flow fan at the other end, a fixing ear arranged at the end of the driving cylinder away from the axial flow fan, a return spring connected to the fixing ear at one end and to the sliding seat at the other end, a groove arranged at the side of the sliding seat, a telescopic rod embedded in the groove at one end, a telescopic spring connected to the bottom wall of the groove at one end and to the end of the telescopic rod at the other end, a first inclined surface arranged at the end of the telescopic rod away from the groove, a support arm arranged at the end of the connecting seat away from the axial flow fan, a second inclined surface arranged on the support arm and for the upper side position of the first inclined surface to be fitted, and a linkage column arranged at the end of the first rod body away from the fixed plate and used to abut against the lower side position of the telescopic rod at one end of the first inclined surface.

[0021] By adopting the above technical solution, when the solenoid valve closes the liquid inlet of the first pipeline, the piston rod of the driving cylinder extends out first, so that the fixed plate moves toward the side away from the flushing pipe, and then the fixed plate can drive the linkage column on the first rod body to move toward the side close to the support arm. At this time, the linkage column can push the telescopic rod so that the first inclined surface of the telescopic rod abuts against the second inclined surface of the support arm. Under the thrust of the linkage column, the telescopic rod can retract into the groove, and the telescopic spring is compressed; until the telescopic rod is separated from the driving column, under the elastic restoring force of the reset spring, the reset spring can drive the slide seat and the axial flow fan to move toward the side close to the filter tube until the axial flow fan moves to the position above the discharge pipe; Then the piston rod of the driving cylinder is contracted, so that the fixed plate moves toward the side close to the flushing pipe, and the fixed plate can drive the connecting rod to move toward the side close to the connecting ring, and then the guiding inclined surface at the end of the third rod body can abut against the wedge block on the lower side of the extension plate, and the guiding inclined surface can generate an upward force on the wedge block, and then the pressure plug can be driven to move upward to open the discharge pipe; When the connecting rod moves toward the side close to the connecting ring, the linkage column first contacts the first inclined surface of the telescopic rod, and then the telescopic rod retracts into the groove under the thrust of the linkage column until the linkage column passes over the telescopic rod, and the telescopic rod moves out of the groove again under the elastic restoring force of the telescopic spring. When the flushing of the filter is completed and the driving cylinder needs to be used to drive the piston plate to reset, the piston rod of the driving cylinder can extend to drive the fixed plate to move toward the side away from the flushing pipe, and the piston plate can move toward the side away from the first pipeline. The linkage column can drive the sliding seat and the axial flow fan to move toward the side away from the filter tube after it abuts against the telescopic rod until the axial flow fan is reset to the position above the heat dissipation pipe, and the piston plate is reset to the position on the side of the second pipeline away from the first pipeline in the flushing pipe, and the solenoid valve is opened at the same time, finally ending the entire process of flushing the filter.

[0022] The present invention is further configured as follows: a dovetail slider is provided at the lower side of the slide seat, and a dovetail slide groove for the dovetail slider to be embedded is provided at the upper side of the connecting seat.

[0023] By adopting the above technical solution, the slide seat is embedded in the dovetail slide groove on the upper side of the connecting seat using the dovetail slider, and at this time, a stable sliding connection of the slide seat on the connecting seat can be achieved.

[0024] The beneficial effects of the present invention are as follows: after the filter screen in the filter tube has filtered for a period of time, the solenoid valve is first used to close the liquid inlet of the first pipeline, and then the piston rod of the driving cylinder is first extended out, so that the fixed plate moves toward the side away from the flushing tube, and then the fixed plate can drive the linkage column on the first rod body to move toward the side close to the support arm, at this time the linkage column can push the telescopic rod so that the first inclined surface of the telescopic rod abuts against the second inclined surface of the support arm, and under the thrust of the linkage column, the telescopic rod can be retracted into the groove, and the telescopic spring is compressed; until the telescopic rod is separated from the driving column, under the elastic restoring force of the reset spring, the reset spring can drive the slide seat and the axial flow fan to move toward the side close to the filter tube, until the axial flow fan moves to the position above the discharge pipe; The piston rod of the driving cylinder is then contracted, so that the fixed plate moves toward the side close to the flushing pipe, and the fixed plate can drive the connecting rod to move toward the side close to the connecting ring, and then the guiding inclined surface at the end of the third rod body can abut against the wedge-shaped block on the lower side of the extension plate, and an upward force can be exerted on the wedge-shaped block through the guiding inclined surface, and then the pressure plug can be driven to move upward to open the discharge pipe. At the same time, after the piston rod of the driving cylinder is contracted, it will also drive the piston plate to move toward the end close to the first pipeline in the flushing pipe through the fixed plate and the driving column. At this time, the piston plate can press the liquid in the flushing pipe into the first pipeline, and the liquid can be flushed into the filter pipe; the liquid flushing into the filter pipe can be reversed The filter screen is flushed upward, and the impurities blocked in the mesh of the filter screen can be washed down, and the impurities and liquid can be discharged into the discharge pipe with the pressure, and the liquid discharged upward in the discharge pipe will fly toward the side of the guide cover along the guide slope of the pressure plug. When the liquid is shot on the guide cover, the liquid can fall back downward under the blocking and guiding effect of the guide cover; at the same time, the falling liquid can fall on the outer wall of the base, and the airflow provided by the axial flow fan can be sprayed on the outer wall of the base. At this time, the liquid on the base can evaporate under the action of the airflow spray and take away the heat from the surface of the base. Finally, the liquid discharged from the discharge pipe can be used to dissipate heat from the surface of the base; When the connecting rod moves toward the side close to the connecting ring, the linkage column first contacts the first inclined surface of the telescopic rod, and then the telescopic rod retracts into the groove under the thrust of the linkage column until the linkage column passes over the telescopic rod, and the telescopic rod moves out of the groove again under the elastic restoring force of the telescopic spring. When the flushing of the filter screen is completed and the driving cylinder needs to be used to drive the piston plate to reset, the piston rod of the driving cylinder can drive the fixed plate to move toward the side away from the flushing pipe after extending, and the piston plate can move toward the side away from the first pipe, wherein the linkage column abuts against the telescopic rod and can drive the sliding seat and the axial flow fan to move toward the side away from the filter pipe, until the axial flow fan is reset to the position above the heat dissipation pipe, and the piston plate is reset to the position on the side of the second pipe away from the first pipe in the flushing pipe, and the solenoid valve is opened at the same time, and finally the whole process of flushing the filter screen is completed; At the same time, when the piston rod of the driving cylinder contracts and drives the piston plate to move in the flushing pipe toward one end close to the first pipeline, negative pressure is generated in the flushing pipe and suction can be generated in the base through the second pipeline, and the liquid in the base can flow back into the flushing pipe. At this time, some impurities adhered to the inner wall of the base can fall off from the inner wall of the base under the impact of the reverse flowing liquid. Finally, the reverse flushing of the base can be completed while the filter screen is reversely flushed, which is beneficial to the stable operation of the main shaft and motor rotor assembly in the base. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0026] Figure 1 is a structural plan view of the present invention, wherein the base and the interior of the pump body are cut away; Figure 2 It is a structural enlarged diagram of the position of the circulation pipe in the present invention; Figure 3 It is a structural plan view of the position of the circulation pipe in the present invention, wherein the filter pipe and the flushing pipe are cut to show that the circulation pipe is in a normal liquid-intake working state at this time; Figure 4 yes Figure 2 Enlarged view of part A in the middle; Figure 5 It is an enlarged view of the connection relationship between the driving cylinder, the fixing plate, the connecting rod, the axial flow fan and the linkage assembly in the present invention; Figure 6 yes Figure 5 Enlarged view of middle part B; Figure 7 It is a partial cross-sectional view of the connection relationship between the connecting seat, the sliding seat, the groove and the telescopic rod in the present invention; Figure 8This is a motion state diagram of the linkage assembly in the present invention, with the top, middle and bottom diagrams respectively showing: the linkage column moves toward the side close to the support arm and drives the telescopic rod to retract into the groove; after the telescopic rod is separated from the linkage column, the return spring drives the axial flow fan to move toward the side of the filter tube; the linkage column moves toward the side close to the filter tube and then passes over the telescopic rod; Fig. 9 It is a plan view of the connection relationship between the filter tube, the discharge pipe, the pressure plug, the wedge block, the guide slope, and the axial flow fan in the present invention, wherein the arrow indicates the flow direction of the liquid after it is ejected from the upper end of the discharge pipe.

[0027] In the figure, 1, base; 11, main shaft; 12, motor rotor assembly; 13, motor stator assembly; 2, pump body; 21, drainage end; 22, water inlet end; 3, circulation pipe; 31, first pipeline; 311, filter pipe; 312, solenoid valve; 313, discharge pipe; 3131, guide sleeve; 314, heat dissipation pipe; 32, second pipeline; 4, filter screen; 5, flushing assembly; 51, flushing pipe; 52, piston plate; 53, drive column; 54, fixing plate; 55, drive cylinder; 551, guide pipe; 6, pressure plug; 61, connecting ear; 62, guide column; 63, connecting ring; 64 , pressure spring; 65, guide slope; 7, transmission member; 71, connecting rod; 711, first rod body; 712, second rod body; 713, third rod body; 72, extension plate; 73, wedge block; 74, guide slope; 8, axial flow fan; 81, guide cover; 9, linkage assembly; 91, connecting seat; 911, dovetail slide; 92, slide seat; 921, dovetail slider; 93, connecting rod; 94, fixing ear; 95, reset spring; 96, groove; 97, telescopic rod; 98, telescopic spring; 99, first slope; 901, support arm; 902, second slope; 903, linkage column. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] A shielded pump with a flushing structure, referring to Figure 1The shielded pump with a flushing structure includes a base 1, a pump body 2, a drainage end 21, a water inlet end 22, a main shaft 11, a motor rotor assembly 12, a motor stator assembly 13, a circulation pipe 3 and a filter screen 4, wherein the pump body 2 is fixed at one end of the base 1 by bolts and is rotatably connected to an impeller inside, and the drainage end 21 is integrally arranged on the upper side of the pump body 2, and the water inlet end 22 is integrally arranged on the side of the pump body 2 away from the base 1, and the main shaft 11 is rotatably connected in the base 1, wherein the motor rotor assembly 12 is installed on the side of the main shaft 11, and the motor stator assembly 13 is installed in the base 1 on the side of the motor rotor assembly 12; since the structure in which the main shaft 11, the motor rotor assembly 12 and the motor stator assembly 13 drive the impeller to rotate is the existing technology, the specific structure is not repeated here.

[0030] Reference Figure 1 , Figure 2 , Figure 3 , Figure 4 , the filter screen 4 is arranged in the circulation pipe 3 so as to filter the liquid in the circulation pipe 3, wherein the circulation pipe 3 includes a first pipe 31 connected with the drainage end 21 at one end, and a second pipe 32 connected with the base 1 at one end, and a filter pipe 311 for placing the filter screen 4 is integrally arranged on the first pipe 31; at the same time, a solenoid valve 312 is installed at one end of the first pipe 31 away from the flushing component 5, and a discharge pipe 313 extending in a vertical upward direction is integrally arranged on the filter pipe 311 and located between the filter screen 4 and the solenoid valve 312, wherein the discharge pipe 313 is provided with a filter for filtering the upper end of the discharge pipe 313 A pressure plug 6 is used for sealing, and connecting ears 61 are bonded on both sides of the pressure plug 6, and guide columns 62 extending in the vertical downward direction are welded on the lower side of the connecting ears 61, and guide sleeves 3131 for the guide columns 62 to pass through are welded on the outer walls of both sides of the drain pipe 313, wherein a connecting ring 63 sleeved on the drain pipe 313 is welded between the lower ends of the two guide columns 62, and the lower end of the guide column 62 is also sleeved with a pressure spring 64, the lower end of which is bonded to the connecting ring 63 and the upper end is bonded to the guide sleeve 3131, the elastic restoring force of the pressure spring 64 ensures the stable sealing effect of the pressure plug 6 on the upper end of the drain pipe 313.

[0031] Reference Figure 2 , Figure 3A flushing assembly 5 for pressing liquid into the first pipeline 31 is provided between the first pipeline 31 and the second pipeline 32. The flushing assembly 5 includes a flushing pipe 51, a piston plate 52, a driving column 53, a fixing plate 54, and a driving cylinder 55. The end face of one end of the flushing pipe 51 is connected to the first pipeline 31 and the side wall of the other end is connected to the second pipeline 32. The piston plate 52 is embedded in the flushing pipe 51. When the circulation pipe 3 is normally filled with liquid, the piston plate 52 is located at a side of the second pipeline 32 away from the first pipeline 31; at the same time, one end of the driving column 53 is welded to the piston plate 52 and the other end passes through the end face of the flushing pipe 51, and the fixing plate 54 is welded to the end of the driving column 53 away from the piston plate 52. The driving cylinder 55 is fixed to the upper side of the flushing pipe 51 by bolts and the end of the piston rod is connected to the fixing plate 54 by bolts.

[0032] Reference Figure 2 , Figure 4 , Figure 5 A transmission member 7 is also provided between the pressure plug 6 and the flushing assembly 5 for opening the pressure plug 6 upward when the flushing assembly 5 presses liquid into the first pipeline 31. The transmission member 7 includes a connecting rod 71, an extension plate 72, a wedge block 73, and a guide slope 74. One end of the connecting rod 71 is connected to the fixed plate 54 and extends toward the side close to the filter tube 311. The connecting rod 71 includes a first rod body 711 welded to the fixed plate 54 at one end, a second rod body 712 welded to the first rod body 711 at one end away from the fixed plate 54 at one end, A third rod 713 is welded at one end to the second rod 712 away from the end of the first rod 711, and a guide tube 551 for the second rod 712 to pass through is fixed to the side wall of the driving cylinder 55 by bolts; at the same time, the extension plate 72 is integrally arranged on one side of the connecting ring 63, and the wedge block 73 is welded to the lower side of the extension plate 72 and has a right triangle cross-section; wherein the guide slope 74 is provided on the upper side of the end of the third rod 713 away from the second rod 712, and the guide slope 74 can be used to abut against the wedge block 73 to drive the extension plate 72 to move upward.

[0033] Reference Figure 2 , Figure 5 , Figure 6 , Figure 7The first pipeline 31 is provided with an S-shaped heat dissipation pipe 314 at a position between the filter pipe 311 and the flushing pipe 51, and the driving cylinder 55 is provided with an axial flow fan 8 located above the heat dissipation pipe 314 and exhausting air downward; the pressure plug 6 is provided with a guide slope 65 on the peripheral side, and a guide cover 81 is welded on the peripheral side of the lower end of the axial flow fan 8, which is open downward and is used to receive the liquid sprayed along the guide slope 65. At the same time, the upper side of the driving cylinder 55 is provided with a guide cover for the axial flow fan before the pressure plug 6 is opened. 8 moves to the linkage assembly 9 above the discharge pipe 313; the linkage assembly 9 includes a connecting seat 91, a sliding seat 92, a connecting rod 93, a fixing ear 94, a return spring 95, a groove 96, a telescopic rod 97, a telescopic spring 98, a first inclined surface 99, a support arm 901, a second inclined surface 902, and a linkage column 903, wherein the connecting seat 91 is fixed to the upper side of the driving cylinder 55 by bolts, and the sliding seat 92 is slidably connected to the connecting seat 91, a dovetail slider 921 is integrally provided on the lower side of the sliding seat 92, and a dovetail slider 921 is provided on the upper side of the connecting seat 91. The dovetail slider 921 is embedded in the dovetail slide 911; at the same time, the connecting rod 93 is fixed to the slide seat 92 at one end by bolts and the other end is fixed to the axial flow fan 8 by bolts, and the fixing ear 94 is fixed to the end of the driving cylinder 55 away from the axial flow fan 8 by bolts, wherein the return spring 95 is welded to the fixing ear 94 at one end and welded to the slide seat 92 at the other end, and the groove 96 is opened at the side of the slide, and at the same time, one end of the telescopic rod 97 is embedded in the groove 96, and the telescopic spring 98 is welded to the bottom wall of the groove 96 at one end and the other end. One end is welded to the end of the telescopic rod 97, wherein the first inclined surface 99 is provided at the end of the telescopic rod 97 away from the groove 96, and the support arm 901 is in an inverted L-shape and the lower end is welded to the end of the connecting seat 91 away from the axial flow fan 8, and the second inclined surface 902 is provided at the upper end of the support arm 901 and is provided for the upper side position of the first inclined surface 99 to fit, and the linkage column 903 is welded at the end of the first rod body 711 away from the fixed plate 54, and the linkage column 903 is used to contact the lower side position of the telescopic rod 97 at one end of the first inclined surface 99.

[0034] Principle: Reference Figure 2 , Figure 3 , Figure 8 , Fig. 9, when the filter screen 4 in the filter tube 311 has filtered for a period of time, the solenoid valve 312 is first used to close the liquid inlet of the first pipeline 31, and then the piston rod of the driving cylinder 55 is first extended, so that the fixed plate 54 moves toward the side away from the flushing tube 51, and then the fixed plate 54 can drive the linkage column 903 on the first rod body 711 to move toward the side close to the support arm 901. At this time, the linkage column 903 can push the telescopic rod 97, so that the first inclined surface 99 of the telescopic rod 97 abuts against the second inclined surface 902 of the support arm 901. Under the thrust of the linkage column 903, the telescopic rod 97 can be retracted into the groove 96, and the telescopic spring 98 is compressed; until the telescopic rod 97 is separated from the driving column 53, under the elastic restoring force of the reset spring 95, the reset spring 95 can drive the slide seat 92 and the axial flow fan 8 to move toward the side close to the filter tube 311, until the axial flow fan 8 moves to the position above the discharge pipe 313; Then, the piston rod of the driving cylinder 55 is contracted, so that the fixing plate 54 moves toward the side close to the flushing pipe 51, and the fixing plate 54 can drive the connecting rod 71 to move toward the side close to the connecting ring 63. Then, the guiding inclined surface 74 at the end of the third rod body 713 can abut against the wedge block 73 on the lower side of the extension plate 72, and the guiding inclined surface 74 can exert an upward force on the wedge block 73, and then the pressure plug 6 can be driven to move upward to open the discharge pipe 313. At the same time, after the piston rod of the driving cylinder 55 is contracted, it will also drive the piston plate 52 to move in the flushing pipe 51 toward the end close to the first pipeline 31 through the fixing plate 54 and the driving column 53. At this time, the piston plate 52 can press the liquid in the flushing pipe 51 into the first pipeline 31, and the liquid can be flushed into the filter tube 311; wherein the liquid The body is flushed into the filter tube 311 to reversely flush the filter screen 4, and the impurities blocked in the mesh of the filter screen 4 can be washed down, and the impurities and liquid can be discharged toward the discharge pipe 313 with the pressure, and the liquid discharged upward in the discharge pipe 313 will fly toward the side of the flow guide cover 81 along the guide slope 65 of the pressure plug 6. When the liquid flies on the flow guide cover 81, it can fall back downward under the blocking and guiding effect of the flow guide cover 81; at the same time, the falling liquid can fall on the outer wall of the base 1, and the airflow provided by the axial flow fan 8 can be sprayed on the outer wall of the base 1. At this time, the liquid on the base 1 can evaporate under the action of the airflow spray and take away the heat from the surface of the base 1. Finally, the liquid discharged from the discharge pipe 313 can be used to dissipate heat from the surface of the base 1; When the connecting rod 71 moves toward the side close to the connecting ring 63, the linkage column 903 first contacts the first inclined surface 99 of the telescopic rod 97, and then the telescopic rod 97 retracts into the groove 96 under the thrust of the linkage column 903 until the linkage column 903 passes over the telescopic rod 97, and the telescopic rod 97 moves out of the groove 96 again under the elastic restoring force of the telescopic spring 98. When the flushing of the filter screen 4 is completed and the driving cylinder 55 needs to be used to drive the piston plate 52 to reset, the piston rod of the driving cylinder 55 is extended to drive the fixing plate 54 to move toward the side away from the flushing pipe 51, and the piston plate 52 can move toward the side away from the first pipeline 31, wherein the linkage column 903 is abutted against the telescopic rod 97 to drive the sliding seat 92 and the axial flow fan 8 to move toward the side away from the filter tube 311, until the axial flow fan 8 is reset to the position above the heat dissipation pipe 314, and the piston plate 52 is reset to the position on the side of the second pipeline 32 away from the first pipeline 31 in the flushing pipe 51, and the solenoid valve 312 is opened at the same time, and finally the whole process of flushing the filter screen 4 is completed; When the piston rod of the driving cylinder 55 contracts and drives the piston plate 52 to move in the flushing pipe 51 toward the end close to the first pipeline 31, negative pressure is generated in the flushing pipe 51 and suction can be generated on the base 1 through the second pipeline 32. The liquid in the base 1 can flow back into the flushing pipe 51. At this time, some impurities adhered to the inner wall of the base 1 can fall off from the inner wall of the base 1 under the impact of the reverse flowing liquid. Finally, the reverse flushing of the base 1 can be completed while the filter screen 4 is reversely flushed, which is beneficial to the stable operation of the main shaft 11 and the motor rotor assembly 12 in the base 1.

Claims

1. A canned motor pump with a flushing structure, comprising a base (1), a pump body (2) disposed at one end of the base (1) and having an impeller therein, a drainage end (21) disposed on the upper side of the pump body (2), a water inlet end (22) disposed on the side of the pump body (2) away from the base (1), a main shaft (11) rotatably connected to the base (1), a motor rotor assembly (12) disposed on the circumference of the main shaft (11), a motor stator assembly (13) disposed on the circumference of the motor rotor assembly (12), a circulation pipe (3) having one end connected to the drainage end (21) and the other end connected to the inside of the base (1), and a filter screen (4) disposed in the circulation pipe (3), characterized in that: The circulation pipe (3) comprises a first pipe (31) having one end connected to the drainage end (21) and a second pipe (32) having one end connected to the base (1); a filter pipe (311) for placing a filter screen (4) is arranged on the first pipe (31); a flushing assembly (5) for pressing liquid into the first pipe (31) is arranged between the first pipe (31) and the second pipe (32); a solenoid valve (312) is arranged at one end of the first pipe (31) away from the flushing assembly (5); a discharge pipe (313) is arranged on the filter pipe (311) and at a position between the filter screen (4) and the solenoid valve (312); a pressure plug (6) for plugging the upper end of the discharge pipe (313) is arranged on the discharge pipe (313); and a transmission member (7) for opening the pressure plug (6) upward when the flushing assembly (5) presses liquid into the first pipe (31) is arranged between the pressure plug (6) and the flushing assembly (5).

2. The shielded pump with a flushing structure according to claim 1, characterized in that: The flushing assembly (5) comprises a flushing pipe (51) whose end surface at one end is connected to the first pipeline (31) and whose side wall at the other end is connected to the second pipeline (32), a piston plate (52) arranged in the flushing pipe (51), a driving column (53) whose one end is connected to the piston plate (52) and whose other end passes through the end surface of the flushing pipe (51), a fixing plate (54) arranged at the end of the driving column (53) away from the piston plate (52), and a driving cylinder (55) arranged on the upper side of the flushing pipe (51) and whose piston rod is connected to the fixing plate (54).

3. A shielded pump with a flushing structure according to claim 2, characterized in that: The pressure plug (6) is provided with connecting ears (61) on both sides, and a guide column (62) extending in a vertical downward direction is provided on the lower side of the connecting ear (61). Guide sleeves (3131) for the guide column (62) to pass through are provided on the outer walls of both sides of the discharge pipe (313). A connecting ring (63) sleeved on the discharge pipe (313) is provided between the lower ends of the two guide columns (62), and the lower end of the guide column (62) is sleeved with a pressure spring (64) whose lower end is connected to the connecting ring (63) and whose upper end is connected to the guide sleeve (3131).

4. The canned motor pump with a flushing structure according to claim 3, characterized in that: The transmission member (7) comprises a connecting rod (71) having one end connected to the fixed plate (54) and extending toward a side close to the filter tube (311), an extension plate (72) arranged on one side of the connecting ring (63), a wedge-shaped block (73) arranged on the lower side of the extension plate (72), and a guide inclined surface (74) provided at one end of the connecting rod (71) away from the fixed plate (54) and used to abut against the wedge-shaped block (73) to drive the extension plate (72) to move upward.

5. The canned motor pump with a flushing structure according to claim 4, characterized in that: The connecting rod (71) comprises a first rod body (711) having one end connected to the fixing plate (54), a second rod body (712) having one end connected to an end of the first rod body (711) away from the fixing plate (54), and a third rod body (713) having one end connected to an end of the second rod body (712) away from the first rod body (711). A guide tube (551) for the second rod body (712) to pass through is provided on a side wall of the driving cylinder (55).

6. The canned motor pump with a flushing structure according to claim 5, characterized in that: A heat dissipation pipe (314) extending in an S-shape is provided on the first pipeline (31) at a position between the filter pipe (311) and the flushing pipe (51), and an axial flow fan (8) is provided on the driving cylinder (55) and is located above the heat dissipation pipe (314) and exhausts air downward.

7. The canned motor pump with a flushing structure according to claim 6, characterized in that: The pressure plug (6) is provided with a guide slope (65) on its circumferential side, the lower end of the axial flow fan (8) is provided with a guide cover (81) which is open downward and is used to receive liquid sprayed along the guide slope (65), and the upper side of the driving cylinder (55) is provided with a linkage assembly (9) for moving the axial flow fan (8) to the top of the discharge pipe (313) before the pressure plug (6) is opened.

8. The canned motor pump with a flushing structure according to claim 7, characterized in that: The linkage assembly (9) comprises a connecting seat (91) arranged on the upper side of the driving cylinder (55), a sliding seat (92) slidably connected to the connecting seat (91), a connecting rod (93) having one end connected to the sliding seat (92) and the other end connected to the axial flow fan (8), a fixing ear (94) arranged at the end of the driving cylinder (55) away from the axial flow fan (8), a return spring (95) having one end connected to the fixing ear (94) and the other end connected to the sliding seat (92), a groove (96) provided on the side of the sliding seat (92), a telescopic rod (97) having one end embedded in the groove (96), and one end connected to the groove (96). A telescopic spring (98) having one end connected to the bottom wall of the telescopic rod (96) and the other end connected to the end of the telescopic rod (97), a first inclined surface (99) provided at the end of the telescopic rod (97) away from the groove (96), a support arm (901) provided at the end of the connecting seat (91) away from the axial flow fan (8), a second inclined surface (902) provided on the support arm (901) and for the upper side of the first inclined surface (99) to fit, and a linkage column (903) provided at the end of the first rod body (711) away from the fixing plate (54) and used to abut against the lower side of the telescopic rod (97) at the end of the first inclined surface (99).

9. The canned motor pump with a flushing structure according to claim 8, characterized in that: A dovetail sliding block (921) is disposed on the lower side of the sliding seat (92), and a dovetail sliding groove (911) for the dovetail sliding block (921) to be embedded is provided on the upper side of the connecting seat (91).

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