Leakage-proof water pump with flange connecting structure

Abstract

A leakproof water pump with a flange connecting structure comprises a water inlet seat, a plurality of water inlet holes formed in the peripheral face of the water inlet seat and an impeller shell arranged above the water inlet seat, a motor is arranged in the water inlet seat, and a motor shaft of the motor is connected with an impeller located in the impeller shell. The center of the upper surface of the impeller shell is provided with an upper water through hole communicated with the inner space of the impeller shell, and the upper surface of the impeller shell is provided with an annular upper limiting protrusion. The upper limiting protrusion is sleeved with a flange attached to the upper surface of the impeller shell, and the flange is in an annular shape. The inner wall of the upper portion of the inner hole of the flange extends inwards to form an annular limiting portion, and the lower surface of the limiting portion is attached to the upper surface of the upper limiting protrusion. According to the leakproof water pump with the flange connection structure, flange connection can be still achieved after the water outlet shell is removed, and meanwhile the stability and the sealing performance of the water pump are guaranteed.

Description

Technical Field

[0001] The utility model relates to a water pump, in particular to a leakage-proof water pump with a flange connection structure. Background Art

[0002] A water pump is a device for conveying water. When the water pump is running, the motor of the water pump will drive the impeller in the impeller housing to rotate. At this time, the water will flow into the impeller housing through several water inlet holes on the water inlet seat, and driven by the impeller, it will flow toward the water outlet of the water outlet housing, and finally flow into the pipe connected to it from the water outlet. The water outlet housing at the highest point of the water pump and the water inlet seat at the lowest point of the water pump are connected by several circumferentially evenly distributed drawstrings, so that the water outlet housing, impeller housing and water inlet seat are pressed against each other to achieve the stability of the three.

[0003] In order to facilitate the connection between the water outlet of the water outlet housing and the external pipeline, the inner wall of the water outlet of the water outlet housing of the traditional water pump is provided with an internal thread, and then the flange is connected through the internal thread. The outer wall of the threaded portion on the flange has an external thread, which can be directly threaded into the water outlet, and finally connected to the external pipeline through the flange. The upper end of the impeller housing itself has a water hole for water outlet. Therefore, even if the water outlet housing is removed, water can still be discharged. However, the impeller housing itself does not have a structure for connecting the flange. Once the water outlet housing is removed, the water pump cannot be connected to the external pipeline. The existence of the water outlet housing will increase the overall height of the water pump. As the height of the water pump increases, the length of the drawstring increases accordingly. When the length of the drawstring becomes longer, the pressure-bearing capacity of the drawstring will become weaker, and it is extremely difficult to ensure its own tensioning force, which ultimately affects the stability and sealing of the water pump. Summary of the invention

[0004] The utility model aims to solve the existing technical problem and to provide a leakage-proof water pump with a flange connection structure, which can still realize flange connection after the water outlet housing is removed, while ensuring the stability and sealing of the water pump.

[0005] The technical solution adopted by the utility model to solve the above technical problems is:

[0006] The utility model discloses an anti-leakage water pump with a flange connection structure, comprising a water inlet seat, a plurality of water inlet holes arranged on the outer peripheral surface of the water inlet seat and an impeller housing arranged above the water inlet seat, a motor is arranged in the water inlet seat, a motor shaft of the motor is connected with an impeller located in the impeller housing, an upper water hole which is connected with the inner space of the impeller housing is arranged at the center of the upper surface of the impeller housing, an annular upper limit protrusion is arranged on the upper surface of the impeller housing; a flange which fits with the upper surface of the impeller housing is arranged on the outer sleeve of the upper limit protrusion, and the flange is annular; an annular limiting portion is extended inwardly from the inner wall of the upper part of the inner hole of the flange, and the lower surface of the limiting portion fits with the upper surface of the upper limit protrusion; a plurality of connection holes which are evenly distributed on the circumference are arranged on the outer edge of the flange; An annular sealing groove is provided on the inner wall of the hole at the lower end of the inner hole of the flange; a set of sealing rings outside the upper limit protrusion is provided in the sealing groove, and the sealing ring is made of rubber; a lower water hole communicating with the internal space is provided at the center of the lower surface of the impeller shell; an annular lower limit protrusion is provided on the upper surface of the water inlet seat, and the lower limit protrusion is embedded in the lower water hole; the lower surface of the impeller shell is in contact with the upper surface of the water inlet seat; a number of connecting seat plates evenly distributed circumferentially are provided on the outer wall of the middle part of the water inlet seat; a number of lower fastening holes evenly distributed circumferentially are provided on the connecting seat plates; a number of upper fastening holes corresponding to the positions of the lower fastening holes are provided on the outer edge of the flange; the upper fastening holes are connected to the lower fastening holes by a drawstring.

[0007] A fastening nut is welded to the upper end of the drawstring; a fastening screw is welded to the lower end of the drawstring; an annular limiting groove is provided on the inner wall of the upper end of the upper fastening hole; the lower end of a fixing screw passes downward through the upper fastening hole, the lower surface of the head of the fixing screw fits with the bottom of the limiting groove, and the fastening nut is screwed to the outside of the lower end of the fastening screw; the lower end of the fastening screw passes downward through the lower fastening hole and is screwed with a nut that fits with the lower surface of the connecting seat plate.

[0008] Both upper and lower ends of the drawstring are welded with drawstring screws; the drawstring screw at the upper end of the drawstring passes upward through the upper fastening hole, and the drawstring screw at the lower end of the drawstring passes downward through the lower fastening hole.

[0009] The upper and lower ends of the drawstring are both welded with drawstring nuts; the drawstring nut at the upper end of the drawstring is coaxial with the upper fastening hole; the drawstring nut at the lower end of the drawstring is coaxial with the lower fastening hole.

[0010] The upper groove wall of the sealing groove and the inner wall of the flange are transitionally connected via a guide cone surface that is narrow at the top and wide at the bottom; an extrusion groove is provided on the upper surface of the sealing ring, and the position of the extrusion groove corresponds to the position of the guide cone surface; the extrusion groove is in the shape of a trumpet that is narrow at the top and wide at the bottom.

[0011] The upper surface of the flange is provided with a plurality of annular grooves which are evenly distributed and radiate outwards.

[0012] An annular auxiliary groove is arranged on the lower surface of the limiting part; a rubber ring matching with the auxiliary groove is arranged in the auxiliary groove.

[0013] The beneficial effects of the utility model are:

[0014] Compared with the prior art, the leakage-proof water pump with a flange connection structure adopting the structure of the utility model removes the water outlet housing, and the upper water hole at the upper end of the impeller housing can replace the water outlet of the water outlet housing for water outlet. At the same time, the flange can be limited above the impeller housing by the upper limit protrusion, and the upper fastening hole on the flange is connected to the lower fastening hole of the connecting seat plate arranged on the water inlet seat by a drawstring. Under the action of the tensioning force of the drawstring, the flange, the impeller housing and the water inlet seat are pressed against each other. When they are tightly attached to each other, a seal can be formed by surface-to-surface contact to ensure the sealing between each other. With the removal of the water outlet housing, the overall height of the water pump is reduced, thereby shortening the length of the drawstring. When the drawstring is shortened, the tensioning force of the drawstring increases, avoiding the situation of easy fatigue and effectively ensuring the stability of the water pump. The presence of the sealing ring can effectively ensure the sealing between the inner wall of the flange and the outer wall of the upper limit protrusion, avoiding the situation that the water flowing through the inner hole of the flange leaks out through the gap between the inner wall of the flange and the outer wall of the upper limit protrusion, thereby achieving a leakage-proof effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a cross-sectional view of the leakage-proof water pump with a flange connection structure of the utility model;

[0016] Figure 2 yes Figure 1 An enlarged view of part A;

[0017] Figure 3 It is a top view of the flange;

[0018] Figure 4 This is a schematic diagram of the structure when the drawstring screws are provided at the upper and lower ends of the drawstring;

[0019] Figure 5 It is a structural schematic diagram when drawstring nuts are provided at the upper and lower ends of the drawstring. DETAILED DESCRIPTION

[0020] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments:

[0021] See also Figures 1 to 5The utility model provides a leakage-proof water pump with a flange connection structure, comprising a water inlet seat 1, a plurality of water inlet holes 2 arranged on the outer circumferential surface of the water inlet seat 1, and an impeller housing 3 arranged above the water inlet seat 1. A motor 4 is arranged in the water inlet seat 1, and the motor shaft of the motor 4 is connected with an impeller 5 located in the impeller housing 3. The center of the upper surface of the impeller housing 3 is provided with an upper water hole 6 that penetrates its internal space, and the upper surface of the impeller housing 3 is provided with an annular upper limit protrusion 7; the upper limit protrusion 7 is covered with a flange 8 that fits the upper surface of the impeller housing 3, and the flange 8 is annular; an annular limiting portion 9 is extended inwardly from the inner wall of the upper part of the inner hole of the flange 8, and the lower surface of the limiting portion 9 fits the upper surface of the upper limit protrusion 7; the outer edge of the flange 8 is provided with a plurality of connection holes 10 that are evenly distributed around the circumference; the inner hole of the flange 8 An annular sealing groove 11 is provided on the inner wall of the lower end opening; a set of sealing rings 12 outside the upper limit protrusion 7 is provided in the sealing groove 11, and the sealing ring 12 is made of rubber; a lower water hole 13 which is connected with the internal space is provided at the center of the lower surface of the impeller housing 3; an annular lower limit protrusion 14 is provided on the upper surface of the water inlet seat 1, and the lower limit protrusion 14 is embedded in the lower water hole 13; the lower surface of the impeller housing 3 is fitted with the upper surface of the water inlet seat 1; a plurality of circumferentially evenly distributed connecting seat plates 15 are provided on the outer wall of the middle part of the water inlet seat 1; a plurality of circumferentially evenly distributed lower fastening holes 16 are provided on the connecting seat plate 15; a plurality of upper fastening holes 17 corresponding to the positions of the lower fastening holes 16 are provided on the outer edge of the flange 8; the upper fastening holes 17 and the lower fastening holes 16 are connected by a drawstring 18.

[0022] A fastening nut 19 is welded to the upper end of the drawstring 18; a fastening screw 20 is welded to the lower end of the drawstring 18; an annular limiting groove 21 is provided on the inner wall of the upper end of the upper fastening hole 17; the lower end of a fixing screw 22 passes downward through the upper fastening hole 17, the lower surface of the head of the fixing screw 22 fits with the bottom of the limiting groove 21, and the fastening nut 19 is screwed to the outside of the lower end of the fastening screw 20; the lower end of the fastening screw 20 passes downward through the lower fastening hole 16 and is screwed with a nut 23 that fits with the lower surface of the connecting seat plate 15.

[0023] The drawstring 18 is welded with drawstring screws 24 at both ends; the drawstring screw 24 at the upper end of the drawstring passes upward through the upper fastening hole 17 , and the drawstring screw 24 at the lower end of the drawstring 18 passes downward through the lower fastening hole 16 .

[0024] The drawstring 18 is welded with drawstring nuts 25 at both ends; the drawstring nut 25 at the upper end of the drawstring 18 is coaxial with the upper fastening hole 17 ; the drawstring nut 25 at the lower end of the drawstring 18 is coaxial with the lower fastening hole 16 .

[0025] The upper groove wall of the sealing groove 11 and the inner wall of the flange 8 are transitionally connected via a guide cone 26 which is narrow at the top and wide at the bottom. An extrusion groove 27 is provided on the upper surface of the sealing ring 12, and the position of the extrusion groove 27 corresponds to the position of the guide cone 26. The extrusion groove 27 is in the shape of a trumpet which is narrow at the top and wide at the bottom.

[0026] The upper surface of the flange 8 is provided with a plurality of annular grooves 28 that are evenly distributed and radiate outwards.

[0027] An annular auxiliary groove 29 is disposed on the lower surface of the limiting portion 9 ; a rubber ring 30 matching the auxiliary groove 29 is disposed in the auxiliary groove 29 .

[0028] The method of using the utility model is as follows:

[0029] When the water pump starts to run, the motor shaft of the motor 4 drives the impeller to rotate. At this time, the impeller housing 3 is filled with water. Driven by the rotation of the impeller 5, suction is generated at the water inlet hole 2 of the water inlet seat 1 to suck the external water flow into the water inlet seat 1. Then the water flow enters the impeller housing 3 through the lower water hole 13, and then flows into the inner hole of the flange 8 through the upper water hole 6. The connecting hole 10 on the flange 8 can be used to connect with an external pipeline. The external pipeline is provided with a through hole corresponding to the position of the connecting hole 10. It only takes the corresponding screws to pass through the connecting hole 10 and the through hole in turn and screw on the corresponding nuts to achieve the connection and fixation between the flange 8 and the external pipeline. Therefore, the water flow in the inner hole of the flange 8 will directly flow into the external pipeline connected to the flange 8 under the push of the subsequent water flow.

[0030] In summary, it can be known that after the water outlet housing is removed in the utility model, the upper water hole 6 at the upper end of the impeller housing 3 can be used to replace the water outlet of the water outlet housing for water outlet. At the same time, the flange can be limited above the impeller housing 3 by the upper limit protrusion 7, and the upper fastening hole 17 on the flange 8 is connected to the lower fastening hole 16 of the connecting seat plate 15 provided on the water inlet seat 1 through the drawstring 18. Under the tension of the drawstring 18, the flange 8, the impeller housing 3 and the water inlet seat 1 are pressed against each other. When they are in close contact with each other, a seal can be formed by surface-to-surface contact. , ensuring the sealing between each other, and with the removal of the water outlet shell, the overall height of the water pump is reduced, thereby shortening the length of the drawstring 18. When the drawstring 18 is shortened, the tensioning force of the drawstring 18 increases, avoiding the situation of easy fatigue, and effectively ensuring the stability of the water pump. The presence of the sealing ring 12 can effectively ensure the sealing between the inner wall of the flange 8 and the outer wall of the upper limit protrusion 7, and avoid the water flowing through the inner hole of the flange 8 from leaking out through the gap between the inner wall of the flange 8 and the outer wall of the upper limit protrusion 7, thereby achieving a leakage prevention effect.

[0031] A fastening nut 19 is welded to the upper end of the drawstring 18, and a fastening screw 20 is welded to the lower end of the drawstring 18. An annular limiting groove 21 is provided on the inner wall of the upper end of the upper fastening hole 17. The lower end of a fixing screw 22 passes downward through the upper fastening hole 17, and the lower surface of the head of the fixing screw 22 fits with the bottom of the limiting groove 21. The fastening nut 19 is screwed to the outside of the lower end of the fastening screw 20, and the lower end of the fastening screw 20 passes downward through the lower fastening hole 16 and is screwed with a nut 23 that fits with the lower surface of the connecting seat plate 15. This fixing method can not only ensure the tensioning force of the drawstring 18, but also facilitate the disassembly and assembly of the drawstring 18, and facilitates the replacement of the drawstring 18.

[0032] Both ends of the drawstring 18 are welded with drawstring screws 24. The drawstring screw 24 at the upper end of the drawstring 18 passes upward through the upper fastening hole 17, and the drawstring screw 24 at the lower end of the drawstring 18 passes downward through the lower fastening hole 16. The drawstring screws 24 at the upper and lower ends of the drawstring 18 only need to be screwed with matching nuts to effectively fix the upper and lower ends of the drawstring 18.

[0033] Both the upper and lower ends of the drawstring 18 are welded with drawstring nuts 25. The drawstring nut 25 at the upper end of the drawstring 18 is coaxial with the upper fastening hole 17, and the drawstring nut 25 at the lower end of the drawstring 18 is coaxial with the lower fastening hole 16. The upper and lower ends of the drawstring 18 can be quickly fixed by simply inserting screws threadedly connected to the drawstring nuts 25 into the upper fastening hole 17 and the lower fastening hole 16.

[0034] The upper groove wall of the sealing groove 11 and the inner wall of the flange 8 are transitionally connected by a guide cone 26 which is narrow at the top and wide at the bottom. An extrusion groove 27 is provided on the upper surface of the sealing ring 12. The position of the extrusion groove 27 corresponds to the position of the guide cone 26. The extrusion groove 27 is in the shape of a trumpet which is narrow at the top and wide at the bottom. When the water flowing through the inner hole of the flange 8 leaks outward through the gap between the inner wall of the flange 8 and the outer wall of the upper limit protrusion 7, the water will directly enter the extrusion groove 27 through the upper notch of the extrusion groove 27 under the guidance of the guide cone 26. In the case of a small amount of water flow, Under the present invention, the extrusion groove 27 can store water and effectively slow down the leakage rate. If subsequent water flows continuously into the extrusion groove 27, the water pressure in the extrusion groove 27 will rise accordingly. At this time, the water flow will be squeezed outward, and the inner wall of the extrusion groove 27 will be pressurized, and the sealing ring 12 will expand accordingly. At this time, the inner wall of the sealing ring 12 further fits on the outer wall of the upper limit protrusion 7, and the outer peripheral surface of the sealing ring 12 further fits on the inner peripheral surface of the sealing groove 11, thereby further improving the sealing effect of the sealing ring 12 and eliminating the problem of water leakage to the greatest extent.

[0035] The upper surface of the flange 8 is provided with a plurality of annular grooves 28 that are evenly radiated outward. When the flange 8 is connected to the external pipe, the end face of the external pipe fits with the upper surface of the flange 8. At this time, an O-ring matching it is arranged in the annular groove 28, which can effectively improve the sealing performance after the external pipe and the flange 8 are connected, and avoid water leakage.

[0036] An annular auxiliary groove 29 is provided on the lower surface of the limiting portion 9, and a rubber ring 30 matching it is provided in the auxiliary groove 29. The presence of the rubber ring 30 can effectively improve the sealing between the lower surface of the limiting portion 9 and the upper surface of the upper limit protrusion 7, and further prevent water from leaking out through the gap between the outer wall of the upper limit protrusion 7 and the inner wall of the flange 8.

Claims

1. A leak-proof water pump with a flange connection structure, comprising a water inlet seat, a plurality of water inlet holes arranged on the outer circumference of the water inlet seat, and an impeller housing arranged above the water inlet seat, a motor is arranged in the water inlet seat, a motor shaft of the motor is connected to an impeller located in the impeller housing, an upper water hole is arranged at the center of the upper surface of the impeller housing and is connected to the internal space of the impeller housing, and the characteristics are: The upper surface of the impeller housing is provided with an annular upper limit protrusion; the upper limit protrusion is covered with a flange that fits the upper surface of the impeller housing, and the flange is annular; an annular limiting portion is extended inwardly from the inner wall of the upper part of the flange inner hole, and the lower surface of the limiting portion fits the upper surface of the upper limit protrusion; the outer edge of the flange is provided with a plurality of connecting holes evenly distributed around the circumference; the inner wall of the lower end of the flange inner hole is provided with an annular sealing groove; a set of sealing rings outside the upper limit protrusion is provided in the sealing groove, and the sealing ring is made of rubber; A lower water hole communicating with the internal space of the wheel housing is provided at the center of the lower surface; a lower limit protrusion in the shape of an annular shape is provided on the upper surface of the water inlet seat, and the lower limit protrusion is embedded in the lower water hole; the lower surface of the impeller housing fits the upper surface of the water inlet seat; a plurality of connecting seat plates evenly distributed circumferentially are provided on the outer wall of the middle part of the water inlet seat; a plurality of lower fastening holes evenly distributed circumferentially are provided on the connecting seat plates; a plurality of upper fastening holes corresponding to the positions of the lower fastening holes are provided on the outer edge of the flange; the upper fastening holes are connected to the lower fastening holes by drawstrings.

2. The anti-leakage water pump with flange connection structure according to claim 1, characterized in that: A fastening nut is welded to the upper end of the drawstring; a fastening screw is welded to the lower end of the drawstring; an annular limiting groove is provided on the inner wall of the upper end of the upper fastening hole; the lower end of a fixing screw passes downward through the upper fastening hole, the lower surface of the head of the fixing screw fits with the bottom of the limiting groove, and the fastening nut is screwed to the outside of the lower end of the fastening screw; the lower end of the fastening screw passes downward through the lower fastening hole and is screwed with a nut that fits with the lower surface of the connecting seat plate.

3. The anti-leakage water pump with flange connection structure according to claim 1, characterized in that: Both upper and lower ends of the drawstring are welded with drawstring screws; the drawstring screw at the upper end of the drawstring passes upward through the upper fastening hole, and the drawstring screw at the lower end of the drawstring passes downward through the lower fastening hole.

4. The anti-leakage water pump with a flange connection structure according to claim 1, characterized in that: The upper and lower ends of the drawstring are both welded with drawstring nuts; the drawstring nut at the upper end of the drawstring is coaxial with the upper fastening hole; the drawstring nut at the lower end of the drawstring is coaxial with the lower fastening hole.

5. The anti-leakage water pump with flange connection structure according to claim 1, characterized in that: The upper groove wall of the sealing groove and the inner wall of the flange are transitionally connected via a guide cone surface that is narrow at the top and wide at the bottom; an extrusion groove is provided on the upper surface of the sealing ring, and the position of the extrusion groove corresponds to the position of the guide cone surface; the extrusion groove is in the shape of a trumpet that is narrow at the top and wide at the bottom.

6. The anti-leakage water pump with a flange connection structure according to claim 1, characterized in that: The upper surface of the flange is provided with a plurality of annular grooves which are evenly distributed and radiate outwards.

7. The anti-leakage water pump with a flange connection structure according to claim 1, characterized in that: An annular auxiliary groove is arranged on the lower surface of the limiting part; a rubber ring matching with the auxiliary groove is arranged in the auxiliary groove.

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