CN114876811A

CN114876811A - Submersible sewage pump with stainless steel overflowing part

Info

Publication number: CN114876811A
Application number: CN202210619885.8A
Authority: CN
Inventors: 袁钧婷
Original assignee: Yuelian Electromechanical Co ltd
Current assignee: Yuelian Electromechanical Co ltd
Priority date: 2022-06-02
Filing date: 2022-06-02
Publication date: 2022-08-09

Abstract

The utility model relates to a part is dive dredge pump of stainless steel overflows, include base, motor, pump shaft, impeller, have the pump body of cavity and the spiral case that has the inner chamber, the spiral case is fixed in pump body bottom, the base is fixed in the spiral case bottom, the base supports spiral case and pump body subaerial, the cavity is airtight setting, the motor is fixed in the cavity, the vertical downward setting of output shaft of motor and coaxial the fixing on the pump shaft, the bottom of pump shaft extends the spiral case inner chamber and with the coaxial fixed connection of impeller, the spiral case adopts stainless steel material to make. The volute casing is made of stainless steel materials, so that the volute casing has high corrosion resistance, the volute casing can be used in a severe environment, meanwhile, the stainless steel materials are more wear-resistant than steel materials, the whole life cycle of the sewage pump can be followed, the damage which influences the normal work of the sewage pump does not occur, and therefore the quality of the sewage pump is improved.

Description

Submersible sewage pump with stainless steel overflowing part

Technical Field

The application relates to the field of sewage pumps, in particular to a submersible sewage pump with a stainless steel overflowing part.

Background

The sewage pump is a pump product which is connected with a motor and simultaneously submerged to work under liquid, and compared with a common horizontal pump or a vertical sewage pump, the sewage pump has compact structure and small occupied area.

As shown in fig. 1, the related art dredge pump includes a base 3, a motor 12, a pump shaft 13, an impeller 22, a pump body 1 with a cavity 11, and a volute 2 with an inner cavity 21, wherein the volute 2 is fixed at the bottom end of the pump body 1, the base 3 is fixed at the bottom end of the volute 2, and the pump body 1, the volute 2, and the base 3 are integrally arranged and are all made of steel materials. The base 3 supports the volute 2 and the pump body 1 on the ground, the chamber 11 is in a closed arrangement, the motor 12 is fixed in the chamber 11, an output shaft of the motor 12 is vertically arranged downwards and coaxially fixed on the pump shaft 13, and the bottom end of the pump shaft 13 extends to an inner cavity 21 of the volute 2 and is coaxially and fixedly connected with the impeller 22.

Place above-mentioned dredge pump in the effluent water sump, the output shaft of motor rotates and drives impeller rotation through the pump shaft rotation, and the blade of impeller will order about the water in the impeller and rotate together, and under centrifugal force's function, the water in the impeller flows to the impeller outer fringe, then flows from the exit of spiral case at last along the circumference inner wall flow of spiral case inner chamber, and external water pipe in the exit of spiral case can take away the sewage in the effluent water sump and reach other places side by side.

The above-mentioned related technical solutions have the following drawbacks: because probably there are silt or other impurity in the effluent water sump, when the in-process that water flows along the circumference inner wall of spiral case inner chamber, silt or impurity in the aquatic can rub with spiral case inner wall, cause the damage of spiral case easily to influence dredge pump's normal use.

Disclosure of Invention

In order to improve the quality of dredge pump, this application provides one kind and overflows partial dive dredge pump that is stainless steel.

The application provides a submersible sewage pump that overflows part and be stainless steel adopts following technical scheme:

the utility model provides a part is dive dredge pump of stainless steel overflows, includes base, motor, pump shaft, impeller, has the pump body of cavity and the spiral case that has the inner chamber, the spiral case is fixed in pump body bottom, the base is fixed in the spiral case bottom, the base supports spiral case and pump body subaerial, the cavity is airtight setting, the motor is fixed in the cavity, the vertical downward setting of output shaft of motor and coaxial the fixing on the pump shaft, the bottom of pump shaft extends the spiral case inner chamber and with the coaxial fixed connection of impeller, the spiral case adopts stainless steel material to make.

Through adopting above-mentioned technical scheme, the spiral case uses stainless steel material to make, makes it have high corrosion resistance, makes it can be used to harsh environment, and stainless steel material is more wear-resisting than steel iron material simultaneously, can follow the whole life cycle of dredge pump and the damage that influences the normal work of dredge pump does not appear to improve the life-span and the quality of dredge pump.

Preferably, the pump further comprises a linkage member, a piston and a reciprocating lead screw, wherein an annular cavity which is arranged in a closed manner is formed in the pump body, the pump shaft is surrounded by the annular cavity, the piston is connected in the annular cavity in a sliding manner along the direction parallel to the axis of the pump shaft, the annular cavity is divided into an upper second cavity and a lower first cavity which are not communicated with each other by the piston, a water inlet channel which is communicated with the first cavity and the inner cavity of the volute is formed in the pump body, a one-way valve is arranged on the water inlet channel, only water in the inner cavity of the volute flows into the first cavity by the one-way valve, a plurality of water outlet channels which are communicated with the first cavity and the outside are formed in the pump body, the water outlet channels are arranged close to the motor, the reciprocating lead screw is rotatably connected in the annular cavity along the direction parallel to the axis of the pump shaft, the reciprocating lead screw penetrates through and is in threaded connection with the piston, and the linkage member is used for driving the reciprocating lead screw to rotate.

Through adopting above-mentioned technical scheme, rotate through the reciprocal lead screw of linkage drive, reciprocal lead screw rotates and drives the piston at the round trip movement in the annular cavity to change the volume size in first chamber, through the cooperation of intake canal, drain and check valve, can extract the water in the inner chamber to first chamber, then with the water pressure in the first chamber to in the drain, because the drain is close to the motor setting, thereby the heat of motor can be taken away to the water in the drain to the motor is cooled down.

Preferably, a water outlet is formed in the center of the outer top surface of the pump body, the outer top surface of the pump body is in a conical shape, the height of the outer top surface of the pump body gradually decreases from one end close to the water outlet to one end far away from the water outlet, and one end, far away from the first cavity, of the water outlet channel is communicated with the water outlet.

Through adopting above-mentioned technical scheme, the water of outlet channel finally assembles the delivery port and flows out, and when the liquid level that the aquatic was put into to the pump body did not sink the pump body, hydroenergy in the delivery port can flow to the circumference outer wall of the pump body along the pump body top surface that the toper set up on to carry out the secondary cooling to the pump body.

Preferably, the linkage piece comprises a first driving piece, a pushing block, a rotating rod, a first gear and a second gear, the pushing block is connected in the cavity in a sliding mode along the direction parallel to the axis of the pump shaft, and the rotating rod is connected to the pushing block in a rotating mode along the direction parallel to the axis of the pump shaft;

the first gear is coaxially meshed with the pump shaft, the second gear is rotatably connected in the cavity and meshed with the first gear, the diameter of the first gear is smaller than that of the second gear, a side block with the length direction parallel to the length direction of the rotating rod is fixed on the side wall of the rotating rod, the rotating rod and the side block are arranged in a penetrating manner and are slidably connected to the second gear along the length direction parallel to the rotating rod, and the rotating rod and the second gear are coaxially arranged;

the top of reciprocal lead screw extends in the cavity and is located the bull stick under, set up the insertion groove that matches with bull stick and side piece on the reciprocal lead screw top surface, be equipped with first spring on the lapse piece, when the pump body is most to be soaked in water, first spring drive lapse piece removes to the bull stick and keeps away from the insertion groove, when the temperature of motor surpassed the rated value on the surface of water when the pump body is most, a drive piece drive lapse piece moves down and makes bull stick and side piece stretch into in the insertion groove.

Through adopting above-mentioned technical scheme, when the pump body is most when soaking in the aquatic, water wraps up the pump body and water has better cooling effect to pump body and motor simultaneously, the bull stick need not drive reciprocal lead screw and rotates the water that extracts in the inner chamber and cool off the motor this moment, when the pump body is most to be located on the surface of water, water no longer carries out whole cooling to the pump body, the temperature of motor function can rise gradually until surpassing the rated value this moment, driving piece drive is passed the piece and is moved down and is stretched into the insertion groove and drive reciprocal lead screw and rotate this moment, can draw the water in the inner chamber automatically and cool down motor and the pump body this moment, thereby the life of extension motor.

Preferably, the driving member one comprises an expansion and contraction block and a butt block, a liquid measuring tube with two communicated ends is fixed on the outer wall of the pump body, the length direction of the liquid measuring tube is parallel to the axis direction of the pump shaft, the liquid level in the liquid measuring tube and the liquid level outside the pump body are at the same horizontal height, the butt block is connected to the pump body in a sliding manner along the axis direction perpendicular to the pump shaft, a first inclined plane is arranged on one side surface of the push block facing the butt block, one end of the butt block is in butt joint with the first inclined plane, the other end of the butt block is fixed on the expansion and contraction block, the expansion and contraction block is completely located in the liquid measuring tube, one end of the expansion and contraction block, which is far away from the butt block, is in butt joint with the inner wall of the liquid measuring tube, when the liquid level in the liquid measuring tube is free of the expansion and contraction block, the rotating rod is far away from the insertion groove, and when the liquid level in the liquid measuring tube is located below the expansion and contraction block, and when the temperature of the motor exceeds a rated value, the expansion and contraction block is in an expansion state, and the rotating rod and the side block extend into the insertion groove.

Through adopting above-mentioned technical scheme, when the liquid level does not have expend with heat and contract with cold piece in the survey liquid pipe, expend with heat and contract with cold piece is soaked in aqueous all the time, expend with heat and contract with cold piece this moment is the contraction status all the time, can not promote the butt piece towards advancing piece one side, so the bull stick can not drive reciprocal lead screw and rotate, when the liquid level is located expend with heat and contract with cold piece below in the survey liquid pipe, water is to the cooling effect variation of the pump body and motor, the motor function intensifies this moment, expend with heat and contract with cold piece has not had the cooling of water, in addition the motor intensifies the conduction to expend with heat and contract with cold on the piece, thereby impel expend with heat and contract with cold piece inflation and promote the butt piece and remove, then drive and advance piece and bull stick and move down, finally make the bull stick stretch into and drive reciprocal lead screw rotation in the insertion groove, it cools down to pump body and motor to absorb the water in the inner chamber.

Preferably, the butt piece towards one side on first inclined plane seted up with first inclined plane complex second inclined plane, first inclined plane butt laminating is all the time on the second inclined plane, survey liquid pipe, push block and butt piece are made by the heat conduction material, the one end that the butt piece was kept away from to the push block is close to the motor setting.

Through adopting above-mentioned technical scheme, first inclined plane can make the better mutual promotion of lapse piece and butt piece with the laminating of second inclined plane mutually, simultaneously through increasing the area of contact of lapse piece and butt piece, the better passing through of the heat that makes the motor passes the piece and transmits to the butt piece at last on the expend with heat and contract with cold piece, make the expend with heat and contract with cold piece more timely sense the temperature variation of motor, in time the inflation promotes the butt piece, can cool down motor and the pump body faster.

Preferably, the centrifugal pump further comprises a second driving part, a scraper and a filter cover, the filter cover is fixed on the inner wall of the inner cavity of the volute, the filter cover surrounds in the inner cavity to form a filter cavity, one end, far away from the first cavity, of the water inlet channel is communicated with the filter cavity, the side face, subjected to water flow impact, of the filter cover is an impact face, a plurality of filter holes are formed in the impact face, the scraper is connected to the impact face in a sliding mode along the axis direction parallel to the pump shaft, the scraper is used for maintaining smoothness of the filter holes, and the second driving part drives the scraper to wipe the impact face back and forth.

Through adopting above-mentioned technical scheme, the filtration pore can be used for filtering the water that the inner chamber got into in the filter chamber, prevent that the check valve from appearing damaging, simultaneously because the impact surface receives the water impact, impurity in the rivers can't be kept off outside the impact surface through filtering the pore, filter the pore has been plugged up in other words indirectly, two drive scraper blades of driving piece make a round trip to wipe off and block up the impurity on filtering the pore, make the filtration pore maintain unblocked, can continuous intaking in making the filter chamber, guaranteed the going on smoothly of the cooling of drawing water.

Preferably, the driving piece II comprises a lifting rod, the lifting rod is connected to the pump body in a sliding mode along the axis direction parallel to the pump shaft, the bottom end of the lifting rod is fixed to the scraping plate, and the top end of the lifting rod is connected with the piston.

Through adopting above-mentioned technical scheme, the removal of piston can drive the scraper blade through the shadoof and move back and forth and wipe away the impact surface.

In summary, the present application includes at least one of the following beneficial technical effects:

the volute is made of stainless steel materials, so that the volute has high corrosion resistance and can be used in a severe environment, and meanwhile, the stainless steel materials are more wear-resistant than steel materials and can follow the whole life cycle of the sewage pump without damage affecting the normal work of the sewage pump, so that the quality of the sewage pump is improved;

through setting up the delivery port, the water of outlet channel finally assembles the delivery port and flows out, and when the liquid level that the aquatic was put into to the pump body did not sink the pump body, hydroenergy in the delivery port can flow to the circumference outer wall of the pump body along the pump body top surface that the toper set up on to carry out the secondary to the pump body and cool down.

Drawings

Fig. 1 is an overall structural diagram of the related art.

Fig. 2 is a schematic overall structure diagram of an embodiment of the present application.

Fig. 3 is a sectional view taken along line a-a of fig. 2.

Fig. 4 is a sectional view taken along line B-B in fig. 2.

Description of reference numerals: 1. a pump body; 11. a chamber; 12. a motor; 13. a pump shaft; 14. an annular cavity; 141. a first chamber; 142. a second chamber; 143. a piston; 144. a reciprocating screw; 1441. inserting the groove; 151. a water inlet channel; 1511. a one-way valve; 152. a water outlet channel; 153. a water outlet; 16. a linkage member; 161. a first driving part; 1611. a butting block; 1612. a thermal expansion and contraction block; 1613. a second inclined surface; 162. a pushing block; 1621. a first inclined surface; 163. a rotating rod; 1631. a side block; 164. a first gear; 165. a second gear; 166. a vertical slot; 167. a first spring; 17. a liquid measuring tube; 2. a volute; 21. an inner cavity; 22. an impeller; 23. a filter housing; 231. a filter chamber; 24. an impact surface; 241. a filtration pore; 25. a squeegee; 26. a driving part II; 261. lifting a rod; 2611. a limiting ring; 262. a second spring; 263. pulling a rope; 264. a transition roll; 265. an extension pole; 27. a straight groove; 3. a base.

Detailed Description

The present application is described in further detail below with reference to figures 2-4.

The embodiment of the application discloses a submersible sewage pump with an overflowing part made of stainless steel.

Referring to fig. 2 and 3, the submersible sewage pump with the stainless steel flow passing part of the embodiment includes a base 3, a motor 12, a pump shaft 13, an impeller 22, a pump body 1 with a chamber 11, and a volute 2 with an inner cavity 21, wherein the volute 2 is fixed at the bottom end of the pump body 1, the base 3 is fixed at the bottom end of the volute 2, and the pump body 1, the volute 2 and the base 3 are integrally arranged. Base 3 supports the spiral case 2 and the pump body 1 subaerial, and cavity 11 is airtight setting, and motor 12 fixes in cavity 11, and the vertical downward setting of output shaft of motor 12 and coaxial the fixing on pump shaft 13, the bottom of pump shaft 13 extend 2 inner chambers 21 of spiral case and with the coaxial fixed connection of impeller 22. The pump body 1 and the base 3 are made of steel material, and the volute 2 is made of stainless steel material.

Referring to fig. 2 and 3, the sewage pump is placed in a sewage tank, the output shaft of the motor 12 rotates to drive the impeller 22 to rotate through the rotation of the pump shaft 13, the blades of the impeller 22 drive the water in the impeller 22 to rotate together, the water in the impeller 22 flows towards the outer edge of the impeller 22 under the action of centrifugal force, then flows along the circumferential inner wall of the inner cavity 21 of the volute 2 and finally flows out of the outlet of the volute 2, and the outlet of the volute 2 is externally connected with a water pipe, so that the sewage in the sewage tank can be pumped away and discharged to other places. Wherein the spiral case 2 is different from the pump body 1 and the base 3 and uses stainless steel material to make, has high corrosion resistance, can be used to harsh environment, and stainless steel material is more wear-resisting than the iron and steel material simultaneously, can follow the whole life cycle of dredge pump and the damage that influences the normal work of dredge pump does not appear to improve the quality of dredge pump.

Referring to fig. 2 and 3, an annular cavity 14 is formed in the pump body 1 in a sealed manner, the pump shaft 13 is enclosed by the annular cavity 14, a piston 143 is slidably connected to the annular cavity 14 along a direction parallel to an axis of the pump shaft 13, the piston 143 divides the annular cavity 14 into an upper second cavity 142 and a lower first cavity 141 which are not communicated with each other, a reciprocating lead screw 144 is rotatably connected to the annular cavity 14, the axis of the reciprocating lead screw 144 is parallel to the axis of the pump shaft 13, the reciprocating lead screw 144 is inserted into and screwed to the piston 143, a linkage 16 is arranged on the pump body 1, and the linkage 16 is used for driving the reciprocating lead screw 144 to rotate.

Referring to fig. 2 and 3, a water inlet channel 151 communicating the first cavity 141 and the inner cavity 21 of the volute 2 is embedded in the pump body 1, the water inlet channel 151 is a solid pipeline, a check valve 1511 is installed on the water inlet channel 151, the check valve 1511 only supplies water in the inner cavity 21 of the volute 2 to the first cavity 141, a plurality of water outlet channels 152 communicating the first cavity 141 and the outside are arranged in the pump body 1, a water outlet 153 is formed in the center of the outer top surface of the pump body 1, the top end, away from the first cavity 141, of the water outlet channel 152 is communicated with the water outlet 153, the plurality of water outlet channels 152 are uniformly distributed in the pump body 1 along the circumferential direction of the pump body 1, and the annular cavity 14 is surrounded by the plurality of water outlet channels 152.

Referring to fig. 2 and 3, the reciprocating screw rod 144 is driven to rotate by the linkage 16, the reciprocating screw rod 144 rotates to drive the piston 143 to move back and forth in the annular cavity 14, so as to change the volume of the first cavity 141, water in the inner cavity 21 can be pumped into the first cavity 141 through the cooperation of the water inlet channel 151 and the water flowing channel with the one-way valve 1511, then the water in the first cavity 141 is pressed into the water outlet channel 152, and because the water outlet channel 152 is arranged close to the motor 12, the water in the water outlet channel 152 can take away heat of the motor 12, so as to cool the motor 12.

Referring to fig. 2 and 3, the water outlet channel 152 is disposed adjacent to the motor 12 for better cooling of the motor 12 by the water in the water outlet channel 152. Meanwhile, in order to better cool the pump body 1 by the water flowing out of the water outlet channel 152 from the pump body 1, the outer top surface of the pump body 1 is tapered, and the height position of the outer top surface of the pump body 1 gradually decreases from the end close to the water outlet 153 to the end far away from the water outlet 153. The water of outlet channel 152 finally assembles delivery port 153 and flows out, and when the liquid level of putting into aquatic in the pump body 1 did not sink the pump body 1, perhaps along with the work of dredge pump, when the liquid level in the pond was located the below of pump body 1 top surface gradually, the hydroenergy in delivery port 153 can flow to the circumference outer wall of pump body 1 along the pump body 1 top surface that the toper set up this moment to carry out the secondary cooling to the pump body 1.

Referring to fig. 2 and 3, the linkage 16 includes a first driving member 161, a pushing block 162, a rotating rod 163, a first gear 164 and a second gear 165, the first gear 164 is coaxially engaged with the pump shaft 13, the second gear 165 is rotatably connected in the chamber 11, an axial direction of the second gear 165 is parallel to an axial direction of the pump shaft 13, the second gear 165 is engaged with the first gear 164, and a diameter of the first gear 164 is smaller than a diameter of the second gear 165.

Referring to fig. 2 and 3, a vertical groove 166 is formed in the pump body 1, the pushing block 162 is slidably connected in the vertical groove 166 along a direction parallel to the axis of the pump shaft 13, the rotating rod 163 is rotatably connected to the pushing block 162 along a direction parallel to the axis of the pump shaft 13, a side block 1631 whose length direction is parallel to the length direction of the rotating rod 163 is fixed on the side wall of the rotating rod 163, the rotating rod 163 and the side block 1631 are inserted and slidably connected to the second gear 165 along a direction parallel to the axis of the pump shaft 13, the rotating rod 163 and the second gear 165 are coaxially arranged, and the rotating rod 163 and the second gear 165 are rotated synchronously all the time.

Referring to fig. 2 and 3, the top end of the reciprocating screw 144 extends into the chamber 11 and is located right below the rotating rod 163, an insertion groove 1441 matching with the rotating rod 163 and the side block 1631 is formed on the top surface of the reciprocating screw 144, and when the rotating rod 163 moves down to the rotating rod 163 and the side block 1631 is inserted into the insertion groove 1441, the rotating rod 163 can drive the reciprocating screw 144 to synchronously rotate. The pushing block 162 is provided with a first spring 167, two ends of the first spring 167 are respectively abutted against the bottom surface of the pushing block 162 and the bottom wall of the vertical groove 166, and the pushing block 162 is always in a compressed state. When the pump body 1 is mostly immersed in water, the pushing block 162 moves upward until the rotating rod 163 is away from the insertion groove 1441 under the action of the first spring 167; when the pump body 1 is mostly above the water level and the temperature of the motor 12 exceeds the rated value, the first driving member 161 is used to drive the sliding block 162 to move down and make the rotating rod 163 and the side block 1631 extend into the insertion groove 1441.

Referring to fig. 2 and 3, when the pump body 1 is mostly immersed in water, water wraps the pump body 1 and has a good cooling effect on the pump body 1 and the motor 12, at this time, the rotating rod 163 does not need to drive the reciprocating screw 144 to rotate to draw water in the inner cavity 21 of the volute 2 to cool the motor 12, when the pump body 1 is mostly located on the water surface, water does not cool the pump body 1 as a whole, the operating temperature of the motor 12 gradually increases until the operating temperature exceeds a rated value, at this time, the driving part 161 drives the pushing block 162 to move downwards to extend into the insertion groove 1441 and drive the reciprocating screw 144 to rotate, at this time, water in the inner cavity 21 can be automatically drawn to cool the motor 12 and the pump body 1, and therefore the service life of the motor 12 is prolonged.

Referring to fig. 2 and 3, the first driving member 161 includes a thermal expansion and contraction block 1612 and an abutting block 1611, a liquid measuring tube 17 is fixed on an outer wall of the pump body 1, a length direction of the liquid measuring tube 17 is parallel to an axial direction of the pump shaft 13, and two ends of the liquid measuring tube 17 are communicated and respectively extend to two ends close to the pump body 1. The sewage pump is put into water, and the liquid level in the liquid measuring pipe 17 is always at the same level height with the liquid level outside the pump body 1. The abutting block 1611 is slidably connected to the pump body 1 along the axial direction perpendicular to the pump shaft 13 and the length direction perpendicular to the liquid measuring tube 17, one end of the abutting block 1611 extends into the vertical groove 166, and the other end of the abutting block 1611 is fixedly connected with the thermal expansion and contraction block 1612.

Referring to fig. 2 and 3, a first inclined surface 1621 is provided on a side surface of the pushing block 162 facing the abutting block 1611, a second inclined surface 1613 matched with the first inclined surface 1621 is provided on a side surface of the abutting block 1611 facing the first inclined surface 1621, a height of the first inclined surface 1621 gradually increases from one end close to the expansion/contraction block 1612 to one end far away from the expansion/contraction block 1612, the second inclined surface 1613 is always abutted and attached to the first inclined surface 1621, and one end of the expansion/contraction block 1612 far away from the abutting block 1611 is abutted and connected to an inner wall of the liquid measurement tube 17.

Referring to fig. 2 and 3, the expansion and contraction block 1612 is completely positioned in the liquid measuring tube 17, and the expansion and contraction block 1612 is arranged opposite to the middle of the height position of the motor 12. The liquid measuring tube 17, the pushing block 162 and the abutting block 1611 are all made of heat conducting materials, and one end, far away from the abutting block 1611, of the pushing block 162 is arranged close to the motor 12.

Referring to fig. 2 and 3, when the liquid level in the liquid measuring tube 17 does not have the thermal expansion and contraction block 1612, the thermal expansion and contraction block 1612 is always immersed in the water, and at this time, the thermal expansion and contraction block 1612 is always contracted, and the abutting block 1611 is not pushed toward the push block 162, so that the rotating rod 163 does not drive the reciprocating screw 144 to rotate. When the liquid level was located expend with heat and contract with cold piece 1612 below in survey liquid pipe 17, water is to the cooling effect variation of the pump body 1 and motor 12, motor 12 function intensification this moment, expend with heat and contract with cold piece 1612 has not had the cooling of water, on motor 12 intensification conduction to expend with heat and contract with cold piece 1612, thereby make expend with heat and contract with cold piece 1612 expand and push butt piece 1611 and remove, then drive and pass piece 162 and bull stick 163 and move down, finally make bull stick 163 stretch into and drive reciprocal lead screw 144 and rotate in the insertion groove 1441, absorb the water in 2 inner chamber 21 of spiral case and cool down the pump body 1 and motor 12.

Referring to fig. 3 and 4, a filter cover 23 is fixed on the inner wall of the inner cavity 21 of the volute 2, and the filter cover 23 does not affect the operation of the impeller 22. The filter cover 23 encloses a filter chamber 231 in the inner cavity 21, and one end of the water inlet channel 151 far away from the first cavity 141 is communicated with the filter chamber 231. Set for one side that filter mantle 23 received water flow impact for impact face 24, seted up a plurality of filtration holes 241 on the impact face 24, filtration hole 241 can be used for filtering the water that inner chamber 21 got into in filter chamber 231, prevents that check valve 1511 from appearing damaging.

Referring to fig. 3 and 4, a scraping plate 25 is slidably connected to the impact surface 24 along a direction parallel to the axis of the pump shaft 13, the scraping plate 25 is used for maintaining the filter hole 241 to be unblocked, a second driving member 26 is arranged in the pump body 1, and the second driving member 26 drives the scraping plate 25 to scrape on the impact surface 24 back and forth. Meanwhile, because the impact surface 24 is impacted by water flow, impurities in the water flow cannot be blocked outside the impact surface 24 through the filter holes 241, which is equivalent to indirectly blocking the filter holes 241. The second driving element 26 drives the scraper 25 to scrape impurities blocked on the filter holes 241 back and forth, so that the filter holes 241 are kept smooth, water can continuously enter the filter cavity 231, and smooth water pumping and cooling are ensured.

Referring to fig. 3 and 4, the second driving element 26 includes an extension rod 265, a lifting rod 261, a second spring 262, a pulling rope 263 and two transition rollers 264, a straight groove 27 whose length direction is parallel to the length direction of the pump shaft 13 is formed in the pump body 1, the lifting rod 261 is slidably connected to the pump body 1 along the axis direction parallel to the pump shaft 13, the bottom end of the lifting rod 261 is fixed on the scraper 25, the top end of the lifting rod 261 extends into the straight groove 27 and is fixedly sleeved with a limit ring 2611, and the lifting rod 261 does not affect the operation of the impeller 22. The limiting ring 2611 is connected to the straight groove 27 in a sliding mode along the sliding direction parallel to the lifting rod 261, the second spring 262 is located in the straight groove 27, two ends of the second spring 262 abut against the inner top wall of the straight groove 27 and the top surface of the limiting ring 2611 respectively, the second spring 262 is in a compressed state all the time, when no external force acts on the lifting rod 261, the limiting ring 2611 abuts against the bottom wall of the straight groove 27 under the action of the second spring 262, and at the moment, the scraper 25 is located at the lowest position of the impact surface 24.

Referring to fig. 3 and 4, the transition rollers 264 are rotatably connected in the pump body 1, the axial direction of the transition rollers 264 is perpendicular to the axial direction of the pump shaft 13, the heights of the two transition rollers 264 are different, the extension rod 265 is vertically arranged, one end of the extension rod 265 is fixed on the bottom surface of the piston 143, and the other end of the extension rod 265 extends downwards out of the first cavity 141. The pulling rope 263 is a steel wire rope which is not easy to break, one end of the pulling rope 263 is fixed at the bottom end of the extension rod 265, and the other end of the pulling rope 263 passes through two transition rollers 264, then passes through the second spring 262 and is finally fixedly connected at the bottom end of the lifting rod 261. When the piston 143 moves to the top toward the second chamber 142, the extension rod 265 moves up along with the piston 143 and drives the scraper 25 to move up through the pulling rope 263 and the lifting rod 261, so that the scraper 25 scrapes the impact surface 24; when the piston 143 moves to the lowermost position toward the first chamber 141 side, the scraper 25 moves downward by the second spring 262, and the impact surface 24 is scraped back and forth.

The implementation principle of the submersible sewage pump with the stainless steel overflowing part in the embodiment of the application is as follows: the sewage pump is placed in a sewage pool, the output shaft of the motor 12 rotates to drive the impeller 22 to rotate through the rotation of the pump shaft 13, the blades of the impeller 22 drive the water in the impeller 22 to rotate together, and under the function of centrifugal force, the water in the impeller 22 flows towards the outer edge of the impeller 22, so that the sewage in the sewage pool can be pumped away and discharged to other places. Wherein the spiral case 2 uses stainless steel material to make, has high corrosion resistance, and stainless steel material is more wear-resisting than steel material simultaneously, can follow the whole life cycle of dredge pump and the damage that influences the normal work of dredge pump does not appear to improve the quality of dredge pump. Meanwhile, when the liquid level of the pool water gradually drops, the motor 12 can not be cooled and heated by the pool water, and the pool water in the inner cavity 21 of the volute 2 can be cooled again through the pump body 1 to the motor 12, so that the normal operation of the sewage pump is ensured.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a part is dive dredge pump of stainless steel overflows, includes base (3), motor (12), pump shaft (13), impeller (22), has the pump body (1) of cavity (11) and has spiral case (2) of inner chamber (21), spiral case (2) are fixed in the pump body (1) bottom, base (3) are fixed in spiral case (2) bottom, base (3) support spiral case (2) and pump body (1) subaerial, cavity (11) are airtight setting, motor (12) are fixed in cavity (11), the vertical downward setting of output shaft of motor (12) and coaxial the fixing on pump shaft (13), the bottom of pump shaft (13) extends spiral case (2) inner chamber (21) and with impeller (22) coaxial fixed connection, its characterized in that: the volute (2) is made of stainless steel materials.

2. The submersible sewage pump with an overflowing part of stainless steel according to claim 1, wherein: the pump body is characterized by further comprising a linkage piece (16), a piston (143) and a reciprocating screw rod (144), wherein an annular cavity (14) is arranged in the pump body (1) in a sealing mode, the annular cavity (14) surrounds the pump shaft (13), the piston (143) is connected in the annular cavity (14) in a sliding mode along the axis direction parallel to the pump shaft (13), the piston (143) divides the annular cavity (14) into an upper cavity (142) and a lower cavity (141) which are not communicated with each other, a water inlet channel (151) which is used for communicating the first cavity (141) with an inner cavity (21) of the volute (2) is arranged in the pump body (1), a one-way valve (1511) is arranged on the water inlet channel (151), the one-way valve (1511) only allows water in the inner cavity (21) of the volute (2) to flow into the first cavity (141), and a plurality of water outlet channels (152) which are used for communicating the first cavity (141) with the outside are arranged in the pump body (1), the water outlet channel (152) is arranged close to the motor (12), the reciprocating lead screw (144) is rotatably connected in the annular cavity (14) along the axial direction parallel to the pump shaft (13), the reciprocating lead screw (144) penetrates through and is in threaded connection with the piston (143), and the linkage piece (16) is used for driving the reciprocating lead screw (144) to rotate.

3. The submersible sewage pump with an overflowing part of stainless steel according to claim 2, wherein: the water outlet (153) is formed in the center of the outer top face of the pump body (1), the outer top face of the pump body (1) is in a conical shape, the height position of the outer top face of the pump body (1) gradually decreases from one end close to the water outlet (153) to one end far away from the water outlet (153), and one end, far away from the first cavity (141), of the water outlet channel (152) is communicated with the water outlet (153).

4. The submersible sewage pump with an overflowing part of stainless steel according to claim 2, wherein: the linkage piece (16) comprises a first driving piece (161), a pushing block (162), a rotating rod (163), a first gear (164) and a second gear (165), the pushing block (162) is connected in the cavity (11) in a sliding mode along the direction parallel to the axis of the pump shaft (13), and the rotating rod (163) is connected to the pushing block (162) in a rotating mode along the direction parallel to the axis of the pump shaft (13);

the first gear (164) is coaxially meshed with the pump shaft (13), the second gear (165) is rotatably connected in the cavity (11) and meshed with the first gear (164), the diameter of the first gear (164) is smaller than that of the second gear (165), a side block (1631) with the length direction parallel to the length direction of the rotating rod (163) is fixed on the side wall of the rotating rod (163), the rotating rod (163) and the side block (1631) are arranged in a penetrating manner and are connected to the second gear (165) in a sliding manner along the length direction parallel to the rotating rod (163), and the rotating rod (163) and the second gear (165) are coaxially arranged;

the top end of the reciprocating lead screw (144) extends into the cavity (11) and is located under the rotating rod (163), an insertion groove (1441) matched with the rotating rod (163) and the side block (1631) is formed in the top surface of the reciprocating lead screw (144), a first spring (167) is arranged on the pushing block (162), when most of the pump body (1) is immersed in water, the first spring (167) drives the pushing block (162) to move to the rotating rod (163) to be far away from the insertion groove (1441), and when most of the pump body (1) is located on the water surface and the temperature of the motor (12) exceeds a rated value, the first driving part (161) drives the pushing block (162) to move downwards and enables the rotating rod (163) and the side block (1631) to extend into the insertion groove (1441).

5. The submersible sewage pump with an overflow part of stainless steel according to claim 4, wherein: the driving piece I (161) comprises an expansion and contraction block (1612) and a butt block (1611), a liquid measuring pipe (17) with two communicated ends is fixed on the outer wall of the pump body (1), the length direction of the liquid measuring pipe (17) is parallel to the axis direction of the pump shaft (13), the liquid level in the liquid measuring pipe (17) and the liquid level outside the pump body (1) are located at the same horizontal height, the butt block (1611) is connected to the pump body (1) in a sliding mode along the axis direction perpendicular to the pump shaft (13), a first inclined plane (1621) is formed in one side face of the butt block (162) facing the butt block (1611), one end of the butt block (1611) is abutted to the first inclined plane (1621), the other end of the butt block (1611) is fixed to the expansion and contraction block (1612), the expansion and contraction block (1612) is completely located in the liquid measuring pipe (17), one end of the expansion and contraction block (1612) far away from the butt block (1611) is abutted to the inner wall of the expansion and contraction block (17), when liquid level did not expend with heat and contract with cold piece (1612) in survey liquid pipe (17), expend with heat and contract with cold piece (1612) is the contraction state, insertion groove (1441) are kept away from in bull stick (163), and liquid level is in expend with heat and contract with cold piece (1612) below in survey liquid pipe (17), and when motor (12) temperature exceeded the rated value simultaneously, expend with heat and contract with cold piece (1612) is the expansion state, bull stick (163) and side piece (1631) stretch into in insertion groove (1441).

6. The submersible sewage pump with an overflowing part of stainless steel as claimed in claim 5, wherein: butt joint piece (1611) one side towards first inclined plane (1621) is seted up with first inclined plane (1621) complex second inclined plane (1613), first inclined plane (1621) butt laminating all the time is on second inclined plane (1613), survey liquid pipe (17), pass piece (162) and butt joint piece (1611) are made by the heat conduction material, the one end that butt joint piece (1611) was kept away from in pass piece (162) is close to motor (12) and sets up.

7. The submersible sewage pump with an overflowing part of stainless steel according to claim 2, wherein: the centrifugal pump is characterized by further comprising a second driving piece (26), a scraper (25) and a filter cover (23), wherein the filter cover (23) is fixed on the inner wall of the inner cavity (21) of the volute (2), the filter cover (23) surrounds the inner cavity (21) to form a filter cavity (231), one end, far away from the first cavity (141), of the water inlet channel (151) is communicated with the filter cavity (231), the side face, subjected to water flow impact, of the filter cover (23) is an impact face (24), a plurality of filter holes (241) are formed in the impact face (24), the scraper (25) is connected to the impact face (24) in a sliding mode along the axis direction parallel to the pump shaft (13), the scraper (25) is used for maintaining smoothness of the filter holes (241), and the second driving piece (26) drives the scraper (25) to wipe back and forth on the impact face (24).

8. The submersible sewage pump with an overflowing part of stainless steel as claimed in claim 7, wherein: the driving piece II (26) comprises a lifting rod (261), the lifting rod (261) is connected to the pump body (1) in a sliding mode along the axis direction parallel to the pump shaft (13), the bottom end of the lifting rod (261) is fixed to the scraper (25), and the top end of the lifting rod (261) is connected with the piston (143).