A pipeline pump structure

Abstract

The present invention discloses a pipeline pump structure, which aims to solve the problems of the inconvenience of processing the drainage holes on the pipeline pump bracket and the poor drainage effect of the drainage holes. The invention includes a pump body, a motor, and a bracket installed between the pump body and the motor. The motor is provided with a rotating shaft extending outward, and a drainage cavity is formed between the bracket and the motor. A plurality of circumferentially evenly distributed drainage holes are formed on the bracket at one time. The front end of the rotating shaft passes through the bracket and is placed in the pump body. One end of the drainage hole opens on the outer wall of the bracket, and the other end of the drainage hole opens in the drainage cavity. The bracket arranged between the motor and the pump body on the pipeline pump of the present application has a good drainage effect, a simple bracket structure, and the drainage holes on the bracket can be directly processed by core pulling of a mold, which is simple to process and helps to reduce processing costs.

Description

Technical Field

[0001] The present invention relates to a water pump, and more particularly to a pipeline pump structure. Background Art

[0002] Pipeline pumps are typically installed in pipelines and can be used for boosting or circulating pressure. To prevent water from entering the motor during use, a drainage structure is often required between the motor and the pump body to allow leaking water to drain promptly and prevent water from entering the motor and causing a short circuit. A common method currently involves installing a bracket between the pump body and the motor, providing a drainage cavity on the bracket, and opening drainage holes on the bracket for drainage. However, the drainage holes on the bracket are small and cannot be directly cored out of the mold, requiring subsequent processing. Furthermore, with only one drainage hole on the bracket, water is difficult to drain due to tension. Furthermore, the current bracket structure is complex and can only be cast, resulting in high costs and complex processes. Summary of the Invention

[0003] In order to overcome the above-mentioned shortcomings, the present invention provides a pipeline pump structure, in which the bracket arranged between the motor and the pump body has good drainage effect, the bracket structure is simple, and the drainage holes on the bracket can be directly processed by core pulling of the mold, which is simple to process and helps to reduce processing costs.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions: a pipeline pump structure, including a pump body, a motor, and a bracket installed between the pump body and the motor, the motor is provided with a rotating shaft extending outward, a drainage cavity is formed between the bracket and the motor, a plurality of drainage holes uniformly distributed circumferentially are formed on the bracket at one time, the front end of the rotating shaft passes through the bracket and is placed in the pump body, one end of the drainage hole opens on the outer wall of the bracket, and the other end of the drainage hole opens in the drainage cavity.

[0005] During the operation of the pipeline pump, the water leaking between the rotating shaft and the bracket flows into the drainage cavity and is discharged outward through the drainage holes, thereby preventing the water from entering the motor and causing the risk of short circuit. Multiple drainage holes are formed on the bracket at one time, and the drainage holes can be directly processed by core pulling of the mold, which is simple to process and helps to reduce costs. Moreover, the drainage holes are evenly distributed, and there is no restriction on the installation direction of the bracket during installation, so that there is no problem of water accumulation in the drainage cavity in all installation directions. The bracket set between the motor and the pump body on the pipeline pump of the present application has a good drainage effect, a simple bracket structure, and the drainage holes on the bracket can be directly processed by core pulling of the mold, which is simple to process and helps to reduce processing costs.

[0006] Preferably, the surface of the bracket facing the motor is a water accumulation surface, and the drainage hole is flush with the water accumulation surface.

[0007] The drainage hole is flush with the water surface to facilitate the drainage of water.

[0008] Preferably, a plurality of connecting ears are provided on the edge of the bracket, a connecting ear is provided between each of two adjacent drainage holes, and the bracket is fastened between the pump body and the motor through the connecting ears.

[0009] The provision of the connecting ears facilitates the installation and fastening of the bracket.

[0010] Preferably, an extension ring extending toward the pump body is provided on the outer edge of the bracket, a connecting ring protruding outward is provided on the outer wall of the extension ring, the end of the extension ring is connected to the pump body sleeve, and the end face of the connecting ring is tightly fitted with the end face of the pump body.

[0011] The provision of the extension ring and the connecting ring facilitates the connection between the bracket and the pump body, and the connection has good sealing performance.

[0012] Preferably, the middle part of the bracket is recessed toward the motor side to form a mounting groove, an impeller is installed at the front end of the rotating shaft, a sealing sleeve is installed between the mounting groove and the impeller, the sealing sleeve is sleeved on the rotating shaft, and a preload spring is installed on the sealing sleeve.

[0013] The installation groove makes the installation of the sealing sleeve more stable and reliable, which is conducive to improving the sealing performance of the connection between the bracket and the rotating shaft. The setting of the pre-load spring keeps the two ends of the sealing sleeve in a compressed state at all times, ensuring the sealing performance.

[0014] Preferably, the outer wall of one end of the sealing sleeve is sealingly fitted with the inner wall of the installation groove, and the end face of the sealing sleeve is sealingly fitted with the bottom face of the installation groove; the other end of the sealing sleeve is sealingly sleeved with the rotating shaft.

[0015] The sealing sleeve is tightly installed between the rotating shaft and the mounting groove, ensuring the sealing performance between the rotating shaft and the bracket during operation.

[0016] Preferably, the bracket is provided with a connecting protruding ring protruding toward the motor side, and the end face of the connecting protruding ring is tightly connected to the end face of the motor.

[0017] The connecting convex ring facilitates the connection with the motor on the one hand, and facilitates the formation of the drainage cavity on the other hand.

[0018] Preferably, a connecting column is provided on the bracket corresponding to the drainage hole, the connecting column radially passes through the connecting protruding ring, and the drainage hole passes through the connecting column.

[0019] The provision of the connecting column not only improves the structural strength of the connecting convex ring, thereby ensuring the structural strength of the entire bracket, but also facilitates the forming of the drainage hole, thereby ensuring the structural strength of the drainage hole position.

[0020] Preferably, a plurality of water grooves are provided on the connecting convex ring; a sleeve is connected to the outside of the motor, a cooling ring cavity is formed between the inner wall of the sleeve and the outer wall of the motor, and slots are provided corresponding to the front end of the motor and the water grooves, and the slots are connected to the cooling ring cavity.

[0021] The water in the pump body flows through the water grooves and slots into the cooling ring cavity, thereby cooling the motor, accelerating the heat dissipation of the motor, and ensuring the performance of the motor. This solution achieves another invention purpose of this application, that is, to achieve good heat dissipation effect of the motor during the operation of the pipeline pump.

[0022] Preferably, a front end cover and a rear end cover are respectively provided at the front and rear ends of the motor, a sleeve is connected between the front end cover and the rear end cover, a plurality of heat sinks are provided on the end face of the front end cover, a drainage ring is tightly connected to the rotating shaft, the heat sink and the drainage ring are both placed in the drainage cavity, a plurality of blades are evenly installed on the drainage ring, and the heat sink is placed on the periphery of the blades; the end face of the drainage ring is attached to the end face of the bracket, and an annular groove is provided on the end face of the drainage ring, the opening of the annular groove faces the gap between the outer wall of the rotating shaft and the bracket, and an outlet hole is provided on the outer wall of the drainage ring near the blade position.

[0023] During shaft rotation, when there's no leakage between the shaft and the bracket, the blades rotate with the shaft, generating airflow that acts on the heat sink, accelerating heat dissipation from the motor. If leakage occurs between the shaft and the bracket, the leaked water flows into the annular groove and out through the outlet holes onto the blades. As the blades rotate, the water is centrifugally driven outward and dispersed by the blades, forming a mist that flows toward the heat sink along with the airflow, significantly improving heat dissipation from the heat sink. This structural arrangement not only accelerates the discharge of leaked water but also enhances heat dissipation from the motor.

[0024] Compared with the prior art, the present invention has the following beneficial effects: (1) the bracket provided between the motor and the pump body of the pipeline pump has a good drainage effect, the bracket structure is simple, and the drainage holes on the bracket can be directly processed by core pulling of the mold, which is simple to process and helps to reduce processing costs; (2) the heat dissipation effect of the motor during the operation of the pipeline pump is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of the present invention;

[0026] Figure 2 is a cross-sectional view of the present invention;

[0027] Figure 3 It is a cross-sectional view of another direction of the present invention;

[0028] Figure 4 It is a schematic structural diagram of the stent of the present invention;

[0029] Figure 5 This is a schematic structural diagram of the stent of the present invention in another direction;

[0030] Figure 6 is a partially enlarged schematic diagram of the bracket connection position of Example 2 of the present invention;

[0031] Figure 7 is a side view of the front end cover of Example 2 of the present invention;

[0032] In the figure: 1. Pump body, 2. Motor, 3. Bracket, 4. Rotating shaft, 5. Drainage chamber, 6. Drainage hole, 7. Water accumulation surface, 8. Pump chamber, 9. Impeller, 10. Liquid inlet, 11. Liquid outlet, 12. Liquid inlet hole, 13. Liquid outlet hole, 14. Connecting ear, 15. Extension ring, 16. Connecting ring, 17. Mounting groove, 18. Sealing sleeve, 19. Preload spring, 20. Spring seat, 21. Connecting convex ring, 22. Connecting column, 23. Flange, 24. Water trough, 25. Sleeve, 26. Cooling ring chamber, 27. Slot, 28. Front cover, 29. Rear cover, 30. Locking screw, 31. Heat sink, 32. Drainage ring, 33. Blade, 34. Ring groove, 35. Outlet hole. DETAILED DESCRIPTION

[0033] The technical solution of the present invention is further described in detail below through specific embodiments and in conjunction with the accompanying drawings:

[0034] Example 1: A pipeline pump structure (see attached Figure 1 To the attached Figure 5 The pump comprises a pump body 1, a motor 2, and a bracket 3 mounted between the pump body and the motor. The motor is provided with an outwardly extending rotating shaft 4, forming a drainage cavity 5 between the bracket and the motor. The bracket is formed with multiple circumferentially evenly spaced drainage holes 6. The front end of the rotating shaft passes through the bracket and is positioned within the pump body. One end of the drainage hole opens into the outer wall of the bracket, and the other end opens into the drainage cavity. The surface of the bracket facing the motor is a water accumulation surface 7, and the drainage hole is flush with the water accumulation surface. In this embodiment, four drainage holes are evenly spaced circumferentially: one each on the top, bottom, left, and right sides.

[0035] The pump body is provided with a pump chamber 8, and an impeller 9 is mounted at the front end of the rotating shaft. The impeller is set in the pump chamber, and the pump body is provided with a liquid inlet 10 and a liquid outlet 11. A liquid inlet hole 12 is provided in the center of the impeller, and a liquid outlet hole 13 is provided at the edge of the impeller. The liquid inlet hole is connected to the liquid inlet, and the liquid outlet is toward the edge of the impeller. As the impeller rotates, the centrifugal force throws the water out and discharges it out through the liquid outlet hole and the liquid outlet.

[0036] Four connecting ears 14 are provided on the edge of the bracket, one between each pair of adjacent drain holes. These ears secure the bracket to the pump body and motor. An extension ring 15 is provided on the outer edge of the bracket, extending toward the pump body. A connecting ring 16 protrudes outward from its outer wall. The end of the extension ring is fitted over the pump body, with the end face of the connecting ring tightly fitting against the pump body.

[0037] The center of the bracket is recessed toward the motor to form a mounting slot 17. A sealing sleeve 18 is installed between the mounting slot and the impeller. The sealing sleeve fits over the rotating shaft and is equipped with a preload spring 19. Two spring seats 20 are located on the outer wall of the sealing sleeve, one closer to the impeller and the other closer to the bracket. The preload spring abuts between the two spring seats. The outer wall of one end of the sealing sleeve seals against the inner wall of the mounting slot, while the end face of the sealing sleeve seals against the bottom surface of the mounting slot. The other end of the sealing sleeve seals against the rotating shaft.

[0038] The bracket features a connecting collar 21 protruding toward the motor. Its end face is tightly connected to the motor's end face. Connecting posts 22 are located on the bracket, corresponding to the drain holes. These posts extend radially through the collar, which extends through the drain holes. An annular flange 23 is located on the outer edge of the connecting collar. The collar is equipped with several water channels 24. A sleeve 25 connects to the motor's exterior, forming a cooling ring cavity 26 between its inner wall and the motor's outer wall. Slots 27 are located at the front end of the motor, corresponding to the water channels, connecting the slots to the cooling ring cavity. Two sealing rings are installed between the front end of the motor and the connecting collar. The slots and water channels are located between the two sealing rings. The front and rear ends of the motor are equipped with front and rear covers 28 and 29, respectively. The slots and cooling fins are located on the front cover. A sleeve is connected between the two covers, and the flange seals fit over the outer edge of the front cover. Several locking screws 30 are evenly spaced between the two covers. These locking screws are located within the cooling ring cavity, transferring heat and improving the motor's heat dissipation.

[0039] During operation, water leaking between the shaft and bracket flows into the drain chamber and out through the drain holes, preventing it from entering the motor and potentially causing a short circuit. Multiple drain holes are formed simultaneously on the bracket, allowing for direct mold core removal, simplifying fabrication and reducing costs. Furthermore, the evenly spaced drain holes eliminate any orientation restrictions during bracket installation, ensuring no water accumulation in the drain chamber. Water within the pump body flows through the water troughs and slots into the cooling ring, cooling the motor and accelerating heat dissipation, thereby ensuring optimal performance.

[0040] Example 2: A pipeline pump structure (see attached Figure 6 , Attachment Figure 7), its structure is similar to that of Example 1, the main difference being that a number of heat sinks 31 are provided on the end face of the front end cover in this embodiment, and the heat sinks are evenly distributed circumferentially, and the heat sinks are arranged 60 degrees radially away from the center from one end to the other. A drainage ring 32 is tightly connected to the rotating shaft, and both the heat sink and the drainage ring are placed in the drainage cavity. A number of blades 33 are evenly installed on the drainage ring, and the heat sinks are placed on the periphery of the blades; the end face of the drainage ring fits on the end face of the bracket, and an annular groove 34 is provided on the end face of the drainage ring. The annular groove opens toward the gap between the outer wall of the rotating shaft and the bracket, and an outlet hole 35 is provided on the outer wall of the drainage ring near the blade position. The side wall of the annular groove is inclined from the inside to the outside in the direction close to the motor, and the outlet hole is inclined from the inside to the outside in the direction close to the motor. The inclined annular groove and outlet hole have a good drainage effect and facilitate the outflow of water. The other structures are the same as those of Example 1.

[0041] During shaft rotation, when there's no leakage between the shaft and the bracket, the blades rotate with the shaft, generating airflow that acts on the heat sink, accelerating heat dissipation from the motor. If leakage occurs between the shaft and the bracket, the leaked water flows into the annular groove and out through the outlet holes onto the blades. As the blades rotate, the water is centrifugally driven outward and dispersed by the blades, forming a mist that flows toward the heat sink along with the airflow, significantly improving heat dissipation from the heat sink. This structural arrangement not only accelerates the discharge of leaked water but also enhances heat dissipation from the motor.

[0042] The above-described embodiments are only preferred solutions of the present invention and are not intended to limit the present invention in any form. Other variations and modifications are possible without exceeding the technical solutions described in the claims.

Claims

1. A pipeline pump structure, comprising a pump body, a motor, and a bracket installed between the pump body and the motor, wherein the motor is provided with an outwardly extending rotating shaft, characterized in that: A drainage cavity is formed between the bracket and the motor, and a plurality of drainage holes evenly distributed in the circumference are formed on the bracket at one time. The front end of the rotating shaft passes through the bracket and is placed in the pump body. One end of the drainage hole opens on the outer wall of the bracket, and the other end of the drainage hole opens in the drainage cavity; the surface of the bracket facing the motor is a water accumulation surface, and the drainage hole is flush with the water accumulation surface; an extension ring extending toward the pump body is provided on the outer edge of the bracket, and the end of the extension ring is connected to the pump body sleeve; a connecting column is provided on the bracket corresponding to the drainage hole, and the drainage hole passes through the connecting column.

2. A pipeline pump structure according to claim 1, characterized in that: A plurality of connecting ears are provided on the edge of the bracket, and a connecting ear is provided between each of two adjacent drainage holes. The bracket is fastened between the pump body and the motor through the connecting ears.

3. A pipeline pump structure according to claim 1, characterized in that: An outwardly protruding connecting ring is provided on the outer wall of the extension ring, and the end face of the connecting ring is tightly fitted with the end face of the pump body.

4. A pipeline pump structure according to claim 1, characterized in that: The middle part of the bracket is recessed toward the motor side to form a mounting groove. The impeller is installed at the front end of the rotating shaft. A sealing sleeve is installed between the mounting groove and the impeller. The sealing sleeve is sleeved on the rotating shaft and is equipped with a preload spring.

5. A pipeline pump structure according to claim 4, characterized in that: The outer wall of one end of the sealing sleeve is sealed and fitted with the inner wall of the installation groove, and the end face of the sealing sleeve is sealed and fitted with the bottom face of the installation groove; the other end of the sealing sleeve is sealed and fitted with the rotating shaft.

6. A pipeline pump structure according to any one of claims 1 to 5, characterized in that: The bracket is provided with a connecting convex ring protruding toward the motor side, and the end face of the connecting convex ring is tightly connected to the end face of the motor.

7. A pipeline pump structure according to claim 6, characterized in that: The connecting column radially passes through the connecting protruding ring.

8. A pipeline pump structure according to claim 6, characterized in that: The connecting convex ring is provided with several water grooves; the motor is connected to the sleeve outside, and a cooling ring cavity is formed between the inner wall of the sleeve and the outer wall of the motor. Slots are provided corresponding to the front end of the motor and the water grooves, and the slots are connected to the cooling ring cavity.

9. A pipeline pump structure according to claim 8, characterized in that: The front and rear ends of the motor are respectively provided with a front cover and a rear cover, the sleeve is connected between the front cover and the rear cover, a number of heat sinks are provided on the end face of the front cover, a drainage ring is tightly connected to the rotating shaft, the heat sink and the drainage ring are both placed in the drainage cavity, a number of blades are evenly installed on the drainage ring, and the heat sink is placed on the periphery of the blades; the end face of the drainage ring is fitted on the end face of the bracket, and an annular groove is provided on the end face of the drainage ring, the opening of the annular groove faces the gap between the outer wall of the rotating shaft and the bracket, and an outlet hole is provided on the outer wall of the drainage ring near the blade position.

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