CN214331004U

CN214331004U - Centrifugal pump with heating function

Info

Publication number: CN214331004U
Application number: CN202023232107.9U
Authority: CN
Inventors: 马余洋; 黄振华
Original assignee: Jiangmen Tiandi Electrical Appliance Co ltd
Current assignee: Jiangmen Tiandi Electrical Appliance Co ltd
Priority date: 2020-12-29
Filing date: 2020-12-29
Publication date: 2021-10-01
Anticipated expiration: 2030-12-29

Abstract

A centrifugal pump with a heating function, comprising: the impeller, cover pump cover, the electrothermal tube of locating the impeller outside, the water inlet is established to the pump cover, delivery port and through-hole, and the electrothermal tube passes through the through-hole and seals and be fixed in on the pump cover, and it still includes the water conservancy diversion lid of locating between impeller and the pump cover, and this water conservancy diversion lid includes diversion export and the water conservancy diversion import of being connected with the water inlet, and the heating space is enclosed with the internal face of pump cover to the water conservancy diversion lid surface, and the electrothermal tube sets up in this heating space. Through the design, the capacity loss caused by irregular movement of water in the pump cover is reduced; and the electrothermal tube can preheat and intensively heat the water in the pump cover, and the heating efficiency and the drainage efficiency of the centrifugal pump are improved.

Description

Centrifugal pump with heating function

Technical Field

The utility model relates to a centrifugal pump especially relates to a centrifugal pump of utensil heating function, and its IPC classification number is F04D.

Background

The conventional centrifugal pump with a heating function is shown in the attached drawing 1 of the specification, and comprises a pump body 10, a pump cover 20 mounted on the pump body, an impeller 30 and an electric heating tube 40 fixed on the pump cover. The pump cover 20 is provided with a water inlet pipe 21 and a water outlet pipe 22, and an impeller cavity 23 is formed after the pump cover and the pump body 10 are installed. The impeller 30 and the electrothermal tube 40 are located in the impeller chamber 23. When the water-saving device works, water enters the impeller cavity 23 from the water inlet 21, the electric heating pipe 40 is electrified to heat the water in the impeller cavity 23, and the impeller 30 rotates to drive the water to be discharged from the water outlet pipe 22. Because the impeller cavity 23 needs to be provided with a space for accommodating the electric heating tube 40, the volume of the impeller cavity 23 is large, and the centrifugal pump with the heating function has the following problems:

1. most of the vertical section at the front end of the electric heating tube is placed in the impeller cavity, so that the height of the impeller cavity is increased, the volume is increased, and water is not guided in the impeller cavity with larger volume, so that the drainage efficiency of the centrifugal pump is low;

2. the impeller cavity has large volume, when the flow of the entering fluid is small, the impeller cavity can not be fully contacted with the electric heating tube, the heating efficiency of the centrifugal pump is low, and the electric heating tube is easy to be damaged by local overheating.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides a promote drainage efficiency and heating efficiency's centrifugal pump.

The utility model adopts the technical proposal that:

a centrifugal pump with a heating function, comprising: the impeller, cover pump cover, the electrothermal tube of locating the impeller outside, the water inlet is established to the pump cover, delivery port and through-hole, and the electrothermal tube passes through the through-hole and seals and be fixed in on the pump cover, and it still includes the water conservancy diversion lid of locating between impeller and the pump cover, and this water conservancy diversion lid includes diversion export and the water conservancy diversion import of being connected with the water inlet, and the heating space is enclosed with the internal face of pump cover to the water conservancy diversion lid surface, and the electrothermal tube sets up in this heating space.

The utility model discloses centrifugal pump of utensil heating function establishes the guiding cap in the pump cover, and when the impeller rotated, the impeller drove rivers and realizes the direction through the guiding cap, reduces the torrent of water in the pump cover and leads to the loss of flow ability; and the electrothermal tube is arranged in a heating space which is enclosed by the diversion cover and the pump cover and has a relatively small volume and is fully contacted with water energy, so that the heat exchange can be fully carried out, and the drainage efficiency and the heating efficiency of the centrifugal pump are improved.

Furthermore, the electric heating tube comprises heating sections which are distributed annularly and vertical heating sections which are connected with the heating sections end to end and extend axially, the axial end face of the pump cover is provided with a tubular water inlet and a hollow boss in a protruding mode, and the vertical heating sections are located in the cavity of the boss. The design makes full use of the space outside the height of the tubular water inlet, and the electric heating pipe can be installed on the pump cover without additionally increasing the height of the pump cover, so that the overall size of the centrifugal pump is favorably reduced.

Furthermore, the tubular water inlet is inclined towards one side far away from the boss, so that the axis of the water inlet and the axis of the impeller form an included angle a. The design is favorable for connecting the external water pipe with the pump cover.

Further, the heating section is more than 2 circles. The design can increase the heating power of the electric heating tube and improve the heating effect.

Furthermore, the electric heating pipe is also provided with an inserting piece for externally connecting a power supply, and the axial height L1 from the root of the inserting piece to the connecting end face of the pump cover is greater than the axial height L2 from the water inlet to the connecting end face of the pump cover. The height of inserted sheet and the highly staggered of water inlet are with this design, appear leaking when reducing the water inlet and external water piping connection and lead to the risk of electric leakage.

Furthermore, the water conservancy diversion lid includes annular surrounding edge, the apron that links to each other with the surrounding edge and the water conservancy diversion inlet tube that links to each other with the apron, and the apron up extends spirally along the direction that encircles water conservancy diversion inlet tube axis, and surrounding edge and apron difference in height maximum area department set up the breach and form the water conservancy diversion export. The design forms a flow channel which guides water to the water outlet upwards in a spiral way in the flow guide cover, so that the fluid turbulence can be reduced, and the flow of the centrifugal pump can be improved.

Furthermore, the water inlet of the pump cover is provided with an annular convex mounting step which is tightly pressed on the diversion water inlet pipe. The design axially limits the flow guide cover, prevents the flow guide cover from axially moving during working, and has simple and reliable structure.

For a better understanding and an implementation, the present invention is described in detail below with reference to the accompanying drawings.

Drawings

Fig. 1 is a sectional view of a conventional centrifugal pump having a heating function;

FIG. 2 is a schematic perspective view of a centrifugal pump with a heating function according to the present invention;

FIG. 3 is an axial sectional view of the centrifugal pump with heating function of the present invention;

fig. 4 is a schematic perspective view of the deflector cap of the present invention;

fig. 5 is a schematic perspective view of the pump cover of the present invention;

FIG. 6 is a schematic view of the electric heating tube of the present invention;

wherein: 1-heating space, 10-pump body, 20-pump cover, 21-water inlet pipe, 22-water outlet pipe, 23-impeller cavity, 30-impeller, 40-electric heating pipe, 100-impeller, 200-guide cover, 210-guide inlet, 220-guide outlet, 230-surrounding edge, 240-cover plate, 250-guide water inlet pipe, 260-flow channel, 300-pump cover, 310-water inlet, 320-water outlet, 330-through hole, 340-boss, 350-mounting step, 400-electric heating pipe, 410-heating section, 420-vertical heating section, 430-inserting sheet, 440-mounting plate, 450-metal column, 500-pump body, 600-stator, 700-rotor, 800-sealing ring

Detailed Description

Referring to fig. 3 and 4, the present invention provides a centrifugal pump with heating function, comprising: the pump body 500, the stator 600 fixed on the pump body, the rotor 700 rotatably installed on the pump body, the impeller 100 installed on the rotor and moving along with the rotor, the diversion cover 200 covering the outer side of the impeller and coaxial with the impeller, the electric heating pipe 400 and the pump cover 300 sequentially covering the outer side of the diversion cover. As shown in fig. 5, the pump cover 300 is provided with a water inlet 310 for externally connecting a water pipe, a water outlet 320 for discharging water, and a through hole 330. The electric heating tube 400 passes through the through hole 330 and is hermetically fixed on the pump cover 300, as shown in fig. 4 and 6, the electric heating tube 400 is provided with a mounting plate 440, a sealing ring 800 is arranged between the mounting plate 440 and the pump cover 300, and the electric heating tube 400 is preferably fixed with the pump cover 300 in a threaded manner and tightly presses the sealing ring 800 for sealing. Of course, the electric heating tube can also be manufactured by the insert and the pump cover in an integral injection molding mode, or other sealing connection processes commonly used in mechanical engineering, such as fusion welding and fixed sealing connection with the pump cover.

Referring to fig. 3 and 4, the flow guide cover 200 is provided with a flow guide outlet 220 and a flow guide inlet 210 connected to the water inlet 310, a heating space 1 is defined by the outer surface of the flow guide cover 200 and the inner wall surface of the pump cover 300, and the electric heating tube 400 is disposed in the heating space 1. The design reduces the loss of flow capacity caused by the turbulent flow of water in the pump cover; and the electrothermal tube can preheat and intensively heat the water in the pump cover, and the heating efficiency and the drainage efficiency of the centrifugal pump are improved.

Referring to fig. 4, as a preferred embodiment of the deflector cap 200, it includes a circumferential rim 230 having a ring shape, a cover plate 240 connected to the rim, and a deflector inlet pipe 250 connected to the cover plate. The cover plate 240 extends upwards spirally along the direction around the axis of the diversion inlet pipe 250, and the surrounding edge 230 and the cover plate 240 are provided with notches in the area with the largest height difference of the cover plate 240 to form the diversion outlet 220. Through the design, the flow channel 260 with the radial section gradually increasing is formed in the flow guide cover 200, water in the centrifugal pump has spiral rising potential energy after being guided by the flow channel 260, a heating space with a small volume can be quickly filled, the centrifugal pump is fully contacted with the electric heating tube, the heat exchange efficiency is improved, the flow resistance can be reduced, the centrifugal pump can be quickly discharged from the water outlet, and the centrifugal pump can meet the requirements of heating performance and flow rate.

Referring to fig. 3, in order to prevent the diversion cover 200 from moving axially in the pump cap 300, an annular raised installation step 350 is arranged at the water inlet 310 of the pump cap, the end surface of the installation step 350 presses the diversion inlet pipe 250 tightly, the outer diameter of the diversion inlet pipe 250 is sleeved with the inner diameter of the installation step 350, and the diversion cover 200 is reliably limited. The design fastens and connects the flow guide cover on the premise of not influencing the flow of the centrifugal pump, and the structure is simple and reliable.

Referring to fig. 5, the pump cap 300 includes a tubular water outlet 320 extending from the side surface of the pump cap, a tubular water inlet 310 protruding from the axial end surface of the pump cap, and a hollow boss 340, and a through hole 330 is disposed on the boss 340. Referring to fig. 6, the electrical heating tube 400 includes an annular heating section 410, a vertical heating section 420 connected end to end with the annular heating section 410 and extending axially, an insert 430 connected with an external power supply, and a mounting plate 440 fixed on the insert 430, wherein a metal column 450 with threads is disposed on the heating plate 440. Specifically, referring to fig. 3, the vertical heating section 420 of the electrical heating tube 400 is located in the cavity of the boss 340, the insertion sheet 430 and the threaded metal post pass through the through hole 330, and the threaded metal post 450 is screwed by a nut to mount the electrical heating tube on the pump cover 300. The design makes full use of the space outside the height of the tubular water inlet, and the electric heating pipe can be installed on the pump cover without additionally increasing the height of the pump cover, so that the overall size of the centrifugal pump is favorably reduced. Further, referring to fig. 6, in order to increase the contact area between the water and the electric heating tube and increase the heating speed, the vertical heating section is arranged in 2 or more turns. The utility model discloses a heating section is 2 circles.

Preferably, referring to fig. 3 and 5, the tubular water inlet 310 of the pump cover 300 is inclined to a side away from the boss 340, so that the axis of the water inlet 310 forms an angle a with the axis of the impeller 100. Further, the included angle a is an acute angle. This design is favorable to being connected of external water pipe and pump cover and is makeed external power supply's inserted sheet and water inlet keep apart, and water direct flow arouses the electric leakage to inserted sheet department when avoiding the water inlet to appear leaking water.

Referring to fig. 3, in order to reduce the risk of electric leakage of the centrifugal pump, the axial height L1 from the root of the insertion piece 430 of the electrothermal tube 400 to the pump cover connection end face is greater than the axial height L2 from the water inlet 310 to the pump cover connection end face. Through this design, the height of inserted sheet staggers with the height of water inlet, avoids water direct flow to inserted sheet department when the water inlet appears leaking and arouses the electric leakage.

The present invention is not limited to the above embodiment, and if various modifications or variations of the present invention do not depart from the spirit and scope of the present invention, they are intended to be covered if they fall within the scope of the claims and the equivalent technology of the present invention.

Claims

1. A centrifugal pump with a heating function, comprising: impeller (100), cover are located pump cover (300), electrothermal tube (400) in the impeller outside, water inlet (310), delivery port (320) and through-hole (330) are established to pump cover (300), electrothermal tube (400) pass through-hole (330) and are sealed to be fixed in on pump cover (300), its characterized in that: the electric heating pump is characterized by further comprising a flow guide cover (200) arranged between the impeller (100) and the pump cover (300) in a covering mode, wherein the flow guide cover (200) is provided with a flow guide outlet (220) and a flow guide inlet (210) connected with the water inlet (310), a heating space (1) is formed by the outer surface of the flow guide cover (200) and the inner wall surface of the pump cover (300) in a surrounding mode, and the electric heating pipe (400) is arranged in the heating space (1).

2. A centrifugal pump with a heating function according to claim 1, characterized in that: the electric heating tube (400) comprises heating sections (410) which are distributed annularly and vertical heating sections (420) which are connected with the heating sections (410) end to end and extend axially, a tubular water inlet (310) and a boss (340) of a hollow inner cavity are protruded on the axial end face of the pump cover (300), and the vertical heating sections (420) are positioned in the inner cavity of the boss (340).

3. A centrifugal pump with a heating function according to claim 2, characterized in that: the tubular water inlet (310) inclines towards one side far away from the boss (340), so that an included angle a is formed between the axis of the water inlet (310) and the axis of the impeller (100), and the included angle a is an acute angle.

4. A centrifugal pump with a heating function according to claim 2, characterized in that: the heating section (410) is more than 2 circles.

5. A centrifugal pump with a heating function according to claim 1, characterized in that: the electrothermal tube (400) is also provided with an inserting sheet (430) for an external power supply, and the axial height L1 from the root of the inserting sheet (430) to the connecting end face of the pump cover is greater than the axial height L2 from the water inlet (310) to the connecting end face of the pump cover.

6. A centrifugal pump with a heating function according to claim 1, characterized in that: the water conservancy diversion lid (200) include annular surrounding edge (230), apron (240) that link to each other with the surrounding edge and water conservancy diversion inlet tube (250) that link to each other with the apron, apron (240) are along the upwards spiral extension of the direction that encircles water conservancy diversion inlet tube (250) axis the surrounding edge (230) and apron (240) difference in height maximum area department set up the breach and form water conservancy diversion export (220).

7. A centrifugal pump with a heating function according to claim 6, characterized in that: an annular convex mounting step (350) is arranged at the water inlet (310) of the pump cover, and the mounting step (350) is tightly pressed on the flow guide water inlet pipe (250).