CN220168232U

CN220168232U - Centrifugal pump with heating function

Info

Publication number: CN220168232U
Application number: CN202321312595.5U
Authority: CN
Inventors: 何沃权; 黄振华
Original assignee: Hanyu Group JSCL
Current assignee: Hanyu Group JSCL
Priority date: 2023-05-29
Filing date: 2023-05-29
Publication date: 2023-12-12
Anticipated expiration: 2033-05-29

Abstract

The utility model provides a centrifugal pump of utensil heating function, including the pump body, the stator, rotor subassembly, the heater, pump cover and end cover, annular water inlet is established to the axial of the wheel cap of rotor subassembly's impeller, the pump cover is the axial and opens, radial surface stretches out the tubular body that has the outlet pipe, the open mouth of axial one side of pump cover is located to the end cover lid, the heater includes the heating pipe and wraps up the cast aluminium shell on it, cast aluminium shell includes discoid heat conduction portion and follows the bellied tubular water conservancy diversion portion of axial terminal surface of heat conduction portion, in assembled state, the heater holds in the impeller chamber that the pump body, pump cover and end cover enclose, and water conservancy diversion portion clearance fit embolias the water inlet of impeller. The centrifugal pump with the design can improve the heating efficiency of the centrifugal pump and simultaneously give consideration to the drainage efficiency of the centrifugal pump.

Description

Centrifugal pump with heating function

Technical Field

The utility model belongs to the field of manufacturing of centrifugal pumps, and particularly relates to a centrifugal pump with a heating function, wherein the IPC classification of the centrifugal pump belongs to F04D 29/58 (2006.01).

Background

In the existing centrifugal pump with heating function for household appliances, in order to improve the heating efficiency of the centrifugal pump, a heater is generally arranged in an impeller cavity surrounded by a pump cover and a pump body. Due to the arrangement of the heater, the resistance of the liquid in the impeller cavity is increased, and the drainage of the centrifugal pump is reduced. Thus, there is a need for improvement.

The structure and action principle of the traditional centrifugal pump for household appliances can be seen in the Chinese patent application with publication numbers of CN202954990U, CN202954989U, CN202602396U, CN202550703U, CN102182711A, CN102223011A and CN 102094832A.

The common knowledge and terms can be seen in mechanical industry Press 1997, 2 nd edition of mechanical engineering handbook and electric machine engineering handbook, mechanical industry Press 2014, 1 st edition of pump theory and technique, and national standard GB/T7021, centrifugal pump noun term.

Disclosure of Invention

In order to solve the problems, the utility model provides the following technical scheme:

the utility model provides a centrifugal pump of utensil heating function, includes the pump body, is fixed in the stator on the pump body, rotationally installs rotor subassembly, heater and the lid on the pump body of locating on the pump body, and rotor subassembly's top is connected with the impeller, and the upper end central authorities of the wheel lid of impeller are equipped with annular water inlet, and the pump lid is the open for axial both ends, and radial surface stretches out the tubular body that has the outlet pipe, its characterized in that: the heater also comprises an end cover arranged on the upper side of the pump cover and provided with an opening, the heater comprises a heating pipe and a cast aluminum shell wrapped on the heating pipe, the cast aluminum shell comprises a disk-shaped heat conducting part and a tubular flow guiding part formed by protruding from the lower end surface of the heat conducting part, the pump body, the pump cover and the end cover enclose an impeller cavity, the heater is accommodated in the impeller cavity, and the flow guide part of the heater is sleeved into the water inlet of the impeller in a clearance fit manner.

According to the centrifugal pump with the heating function, the heater is arranged in the impeller cavity and increases the contact area with liquid through the disc-shaped heat conducting part; meanwhile, the flow guide part of the heater can guide the liquid entering from the water inlet to the water inlet of the impeller directly, so that the resistance of the liquid entering the impeller cavity is reduced, and the leakage of the entering liquid is avoided. The centrifugal pump with the design can improve the heating efficiency of the centrifugal pump and simultaneously give consideration to the drainage efficiency of the centrifugal pump.

Further, the depth h of the guide part sleeved into the water inlet is more than 2mm.

Further, the inner wall of the pump cover is internally provided with a volute-shaped pump cover flow guide part with a radial section gradually increasing along the circumferential direction of the water outlet pipe.

Further, the pump cover and the end cover are detachably connected through a turnbuckle.

Further, the cast aluminum shell is provided with a mounting column protruding towards the direction of the end cover, and the end cover is provided with a first through hole for the terminal to pass through and a third through hole for being in threaded connection with the mounting column.

Further, a thermal protector is arranged on the surface of the cast aluminum shell, and the thermal protector is provided with a thermal protector external connection part for external connection.

Further, the method comprises the steps of: the cast aluminum shell is provided with a waterproof part formed by protruding surrounding ribs and a cylindrical raised temperature measuring part towards the direction of the end cover, the temperature measuring part is located in a surrounding shielding area of the waterproof part, the axial end face of the end cover is also provided with a second through hole, the external connection part of the thermal protector penetrates through the second through hole and is exposed out of the end face of the end cover, and the axial end face of the thermal protector is clung to the temperature measuring part.

Further, a protecting cover with a protecting cover through hole is further covered on the end cover, a reset part for resetting is arranged on the axial end face of the thermal protector, and in the assembled state, the external connection part of the thermal protector and the reset part are opposite to the protecting cover through hole.

Further, an annular first elastic sealing body is arranged between the axial end face of the thermal protector and the protecting cover.

Further, a second elastic sealing body in the shape of a ring is provided between the waterproof portion and the end cap.

Drawings

FIG. 1 is a schematic diagram of a centrifugal pump with heating function according to the present utility model;

FIG. 2 is a radial cross-sectional view of a centrifugal pump with heating function of the present utility model;

FIG. 3 is a schematic view of a partial enlarged structure of FIG. 2A;

FIG. 4 is another radial cross-sectional view of the centrifugal pump with heating function of the present utility model;

FIG. 5 is a schematic structural view of the pump cap of the present utility model;

fig. 6 is a schematic structural view of a heater of the present utility model;

FIG. 7 is a schematic structural view of an end cap of the present utility model;

FIG. 8 is a schematic view of the thermal protector of the present utility model;

FIG. 9 is a schematic view of the structure of the protecting cover of the present utility model

Wherein: 10-impeller cavity, 20-first elastic seal, 30-second elastic seal, 100-pump body, 200-stator, 300-rotor assembly, 310-impeller, 311-shroud, 312-disk, 313-water inlet, 314-vane, 320-spindle, 400-heater, 410-heating tube, 411-terminal, 420-cast aluminum housing, 421-heat conducting portion, 422-deflector, 430-mounting post, 440-waterproof portion, 450-temperature measuring portion, 500-pump cover, 510-water outlet tube, 520-pump cover body, 521-cam, 530-pump cover deflector, 600-end cap, 610-first through hole, 620-second through hole, 630-third through hole, 640-spin groove, 650-end cap water inlet, 660-end cap body, 700-mounting screw, 800-thermal protector, 810-thermal protector external connection, 820-reset portion, 830-thermal protector body, 900-protecting cover, 910-protecting cover through hole

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

As shown in the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. In describing the apparatus, system, device, and structure of the present utility model, the water inlet is located above or above, and the opposite side is located below or below. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model.

Referring to fig. 1 to 4, the present utility model discloses a centrifugal pump with a heating function, comprising a pump body 100 of a prior art structure, a stator 200 fixed on the pump body 100, a rotor assembly 300 rotatably mounted on the pump body, a heater 400, a pump cover 500 covering the pump body 100 and an end cover 600 covering the upper end of the pump cover 500, wherein the rotor assembly 300 comprises a rotating shaft 320 and an impeller 310 fixed on one axial end of the rotating shaft 320, the impeller 310 comprises a shroud 311, a wheel disc 312 and a vane 314 connecting the two, and an annular water inlet 313 is arranged in the center of the upper end of the shroud 311. Referring to fig. 5, the pump cap 500 includes a cylindrical pump cap body 520 having both ends open in the axial direction, and a water outlet pipe 510 extending from the radially outer surface of the pump cap body 520. Referring to fig. 2 and 6, the heater 400 includes a heating pipe 410 and a cast aluminum housing 420 surrounding the heating pipe 410, the heating pipe 410 being provided with a terminal 411 for connection of an external power source, the cast aluminum housing 420 including a disk-shaped heat conductive portion 421 and a tubular guide portion 422 protruding from the heat conductive portion 421 toward the middle of the end face of the impeller side. Referring to fig. 7, the end cap 600 includes a plate-shaped end cap body 660, a tubular end cap water inlet 650 protruding from an axial end surface of the end cap body 660, and a through hole provided on the axial end surface of the end cap body 660 for other parts to pass through or be exposed. In the installed state, the heater 400 is accommodated in the impeller chamber 10 defined by the pump body 100, the pump cover 500 and the end cover 600, and the guide portion 422 thereof is fit into the water inlet 313 of the impeller 310 in a clearance fit.

Preferably, as seen in fig. 3, the diverter 422 of the centrifugal pump is nested to a depth h of greater than 2mm. Experiments prove that the structural design can well avoid leakage of the entering liquid and return of the liquid discharged by the impeller to the inlet of the impeller.

In order to reduce the resistance of the liquid in the impeller cavity when being discharged to the water outlet pipe of the centrifugal pump, the water discharging efficiency of the centrifugal pump is further improved. Referring to fig. 2 and 5, the inner wall of the pump cover 500 is further provided with a volute-shaped pump cover guide part 530 inward, wherein a radial section of the pump cover guide part 530 gradually increases along a circumferential direction of the water outlet pipe 510.

Referring to fig. 2, to facilitate maintenance of the heater, the pump cap 500 is detachably coupled to the end cap 600 by a screw. Referring to fig. 5 and 7, as an embodiment of the present utility model, the outer edge of the upper end surface of the pump cap body 520 of the pump cap 500 is protruded to form a male button 521, the outer edge of the end cap 600 is provided with a screw groove 640, and the pump cap 500 is fixedly connected with the end cap 600 by screwing the male button 521 into the screw groove 640. Of course, as other embodiments, studs may be provided on the outer periphery of the pump cover main body of the pump cover, through holes may be provided on the end cover, and the studs and the through holes may be screwed and fixed.

The heater 400 of the centrifugal pump with heating function of the present utility model is connected with the end cap 600 by the mounting screw 700, and the connection structure is as shown in fig. 1, 2, 6 and 7, the cast aluminum housing 420 protrudes the mounting post 430 toward the axial direction of the end cap 600, and the through hole of the end cap 600 includes the first through hole 610 through which the terminal 411 passes and the third through hole 630 through which the mounting screw 700 passes. When assembled, after the terminal 411 of the heater 410 passes through the first through hole 610 of the end cover 600, the mounting screw 700 passes through the third through hole 630 and is connected with the mounting post 430, so as to realize the fixed connection between the end cover 600 and the heater 400. According to the design, the end cover can be fixedly installed with the heater through the installation screw, so that automatic assembly is facilitated.

As shown in fig. 1 and 2, the pump cover 500 of the centrifugal pump with heating function of the present embodiment is connected to the pump body 100 by a snap fit. Of course, in other embodiments, studs may be provided on the outer periphery of the pump cover main body of the pump cover, and lugs and through holes may be provided on the outer edge of the upper end of the pump body, and the two may be fastened by screw connection.

Referring to fig. 2 and 8, in order to enhance the safety of the centrifugal pump with a heating function according to the present utility model, a thermal protector 800 is further provided on the surface of the cast aluminum housing 420 of the centrifugal pump, wherein the thermal protector 800 includes a thermal protector body 830, a thermal protector external connection portion 810 protruding outward from the thermal protector body 830, and a reset portion 820 provided on an axial end surface of the thermal protector body 830. As a preferred connection structure of the heater and the thermal protector, as shown in fig. 2 and 6, the cast aluminum housing 420 of the heater is provided with a waterproof portion 440 formed by protruding ribs and a cylindrical raised temperature measuring portion 450 toward the end cap 600, the temperature measuring portion 450 being located in the shielding region of the waterproof portion 440. Referring to fig. 2 or 7, the through hole of the end cap 600 further includes a second through hole 620 through which the heat supply protector 800 passes. When in installation, the axial end surface of the thermal protector 800 is tightly attached to the temperature measuring part 440, and the thermal protector external connection part 810 of the thermal protector 800 penetrates through the second through hole 620 and extends towards the end cover 600. The heater 400 and the thermal protector 800 may be fixed by screws, and the axial end surface of the temperature measuring portion 450 may be tightly attached to the temperature measuring surface of the thermal protector 800. Through the design, the thermal protector can detect the temperature of the heater, and when the temperature of the heater is too high, the external power supply is disconnected to stop supplying power to the heater, so that the use safety of the centrifugal pump is improved.

Referring to fig. 2 and 9, the centrifugal pump with heating function of the present utility model further comprises a protecting cover 900 disposed on the axially outer side of the end cover 600, and a protecting cover through hole 910 is disposed on the axial end surface of the protecting cover 900. In the assembled state, the outer connection 810 and the reset 820 of the thermal protector are opposite to the through hole 910, which is convenient for the user to reset the thermal protector through the through hole, and for the maintenance of the centrifugal pump.

In order to reduce short circuit or electric leakage of the thermal protector caused by splashing of external liquid into the waterproof part, the use safety of the centrifugal pump is improved, as shown in fig. 4. The centrifugal pump with heating function of the present utility model includes an annular first elastic sealing body 20 provided between the axial end face of the thermal protector 800 and the protecting cover 900. Further, as shown in fig. 2 or 3, in order to prevent the water liquid from penetrating into the waterproof part from the impeller cavity to cause short circuit or electric leakage of the thermal protector, the use safety of the centrifugal pump is improved. The centrifugal pump with heating function of the present utility model further includes a second elastic sealing body 30 in a ring shape provided between the waterproof part 440 and the end cap 600.

Claims

1. The utility model provides a centrifugal pump of utensil heating function, includes pump body (100), stator (200) on being fixed in the pump body, rotationally installs rotor subassembly (300), heater (400) and the pump cover (500) of covering on the pump body, the top of rotor subassembly (300) is connected with impeller (310), the upper end central authorities of wheel cap (311) of impeller (310) are equipped with annular water inlet (313), pump cover (500) are the open for axial both ends, and radial surface stretches out the tubular body that has outlet pipe (510), its characterized in that: still including setting up in the open end cover (600) in the upside of pump cover (500), heater (400) include heating pipe (410) and wrap up cast aluminum shell (420) on it, cast aluminum shell (420) include discoid heat conduction portion (421) and follow tubular water conservancy diversion portion (422) that the lower terminal surface of heat conduction portion (421) is protruding to form, pump body (100), pump cover (500) and end cover (600) surround and form impeller chamber (10), heater (400) hold in this impeller chamber (10) and water inlet (313) that impeller (310) were emboliaed with its water conservancy diversion portion (422) clearance fit.

2. A centrifugal pump according to claim 1, wherein: the depth h of the guide part (422) sleeved into the water inlet (313) is more than 2mm.

3. Centrifugal pump according to claim 1 or 2, characterized in that: the inner wall of the pump cover (500) is internally provided with a volute-shaped pump cover flow guide part (530) with a radial section gradually increasing along the circumferential direction of the water outlet pipe (510).

4. A centrifugal pump according to claim 1, wherein: the pump cover (500) is detachably connected with the end cover (600) through a turnbuckle.

5. A centrifugal pump according to claim 1, wherein: the cast aluminum shell is provided with a mounting column (430) protruding towards the direction of the end cover (600), and the end cover (600) is provided with a first through hole (610) for a terminal (411) to pass through and a third through hole (630) for being in threaded connection with the mounting column (430).

6. A centrifugal pump according to claim 1, wherein: the surface of the cast aluminum shell (420) is also provided with a thermal protector (800), and the thermal protector (800) is provided with a thermal protector external connection part (810) for external connection.

7. The centrifugal pump according to claim 6, wherein: the cast aluminum shell (420) is provided with a waterproof part (440) formed by protruding surrounding ribs and a cylindrical raised temperature measuring part (450) towards the end cover (600), the temperature measuring part (450) is located in a surrounding area of the waterproof part (440), a second through hole (620) is further formed in the axial end face of the end cover (600), the external part (810) of the thermal protector penetrates through the second through hole (620) to be exposed out of the end face of the end cover (600), and the axial end face of the thermal protector (800) is tightly attached to the temperature measuring part (450).

8. A centrifugal pump according to claim 6 or 7, wherein: the end cover (600) is also covered with a protecting cover (900) with a protecting cover through hole (910), the axial end surface of the thermal protector (800) is provided with a resetting part (820) for resetting, and in the assembled state, the external part (810) of the thermal protector and the resetting part (820) are opposite to the protecting cover through hole (910).

9. The centrifugal pump according to claim 8, wherein: an annular first elastic sealing body (20) is arranged between the axial end face of the thermal protector (800) and the protecting cover (900).

10. The centrifugal pump according to claim 7, wherein: an annular second elastic sealing body (30) is arranged between the waterproof part (440) and the end cover (600).