Vertical multi-stage pump

Abstract

The utility model discloses a vertical multistage pump which comprises a motor, the output end of the motor is connected with a motor base, the lower end of the motor base is rotationally connected with a blade assembling structure, and the upper end of the blade assembling structure penetrates through the motor base to be connected with the motor. A first circular groove is formed below the motor base; a water inlet and outlet section is arranged at the lower end of the blade assembly structure, second circular grooves are formed above the water inlet and outlet section, and a sleeve is arranged between the second circular grooves and surrounds the outer side of the blade assembly structure; a water inlet channel is arranged in the water inlet and outlet section and is communicated with the water inlet end of the blade assembly structure; a water outlet channel is arranged in the water inlet and outlet section and communicated with the interior of the sleeve. The flow speed and pressure of water flow can be changed in a large range according to requirements, and the lifting effect is obvious.

Description

Technical Field

[0001] The utility model relates to a vertical multistage pump, belonging to the technical field of vertical multistage pumps. Background Art

[0002] The vertical multistage pump is designed and manufactured with reference to advanced foreign products. The impeller, guide vane and guide shell are made of stainless steel sheet stamping, stretching and welding, and hard alloy mechanical seals and guide bearings are used. It has the remarkable characteristics of high efficiency, energy saving, vertical installation, small footprint, light weight and beautiful appearance. It is an ideal replacement product. The vertical multistage is suitable for conveying clean water or liquids with physical and chemical properties in high-pressure operation systems, such as high-rise building water supply, boiler water supply, fire protection system, etc. for conveying or pipeline pressurization. For example, the Chinese utility model patent with the authorization announcement number CN2773363Y discloses a barrel of a barrel bag type vertical multistage pump, and specifically discloses a barrel body including a vertical multistage pump, which is characterized in that at least one group of stable support through holes is evenly distributed in an annular manner on the barrel wall equidistant from one end face of the barrel body, and the stable support through hole group is composed of more than two stable support through holes perpendicular to the barrel wall and centripetal, and each stable support through hole is equipped with a positioning support column and a screw plug that matches it respectively. However, the water flow of this scheme enters from the cylinder body and faces the middle part of the suspension component of the pump. The suspension component of the pump will drive the water at the bottom to flow upward. The directions of the two water flows are perpendicular, which will reduce the flow rate of the rising water flow. Moreover, the water flow speed-up and pressure-increasing of this scheme can only be achieved by changing the speed of the motor. Utility Model Content

[0003] The purpose of the utility model is to provide a vertical multi-stage pump. The utility model can change the flow rate and pressure of water flow in a large range according to the needs, and the lifting effect is obvious.

[0004] The technical solution of the utility model is as follows: a vertical multi-stage pump comprises a motor, an output end of the motor is connected to a motor base, a lower end of the motor base is connected to a blade assembly structure, an upper end of the blade assembly structure passes through the motor base and is connected to the motor; a first circular groove is provided below the motor base; a water inlet and outlet section is provided at the lower end of the blade assembly structure, a second circular groove is provided above the water inlet and outlet section, a sleeve is provided between the second circular groove and the first circular groove, and the sleeve surrounds the outer side of the blade assembly structure; a water inlet is provided in the water inlet and outlet section, and the water inlet is communicated with the water inlet end of the blade assembly structure; a water outlet is provided in the water inlet and outlet section, and the water outlet is communicated with the inside of the sleeve.

[0005] In the above-mentioned vertical multi-stage pump, the blade assembly structure includes a pump shaft, and a limit ring is provided at the upper end of the pump shaft; the pump shaft is provided with a plurality of impeller units located below the limit ring and stacked in sequence; the impeller unit includes an impeller, and the outer sleeve of the impeller is provided with a middle section; a shaft sleeve is provided below the impeller, and the shaft sleeve passes through the middle section and abuts against the impeller of another impeller unit below; a water outlet is provided on the side of the middle section of the uppermost impeller unit; and a water inlet is provided in the middle section of the lowermost impeller unit.

[0006] The aforementioned vertical multi-stage pump has a fastening mechanism between the motor seat and the water inlet and outlet sections, and the fastening mechanism includes a plurality of through holes arranged below the motor seat and a plurality of threaded holes arranged above the water inlet and outlet sections, and the threaded holes correspond to the through holes one by one; a pull rod is arranged between the threaded holes and the through holes, and a second threaded portion is provided at both ends of the pull rod, wherein the second threaded portion at one end cooperates with the threaded hole, and the second threaded portion at the other end passes through the top of the through hole and is connected with a nut.

[0007] The aforementioned vertical multi-stage pump has a pressure measuring channel at the end of the water outlet channel of the water inlet and outlet sections, and a pressure gauge is connected to the outer end of the pressure measuring channel.

[0008] The vertical multi-stage pump mentioned above has an annular protrusion below the motor seat, which is located on the inner side of the inner wall of the middle section and fits closely.

[0009] The aforementioned vertical multi-stage pump has a square platform at the lower end of the water inlet and outlet sections, and a plurality of connecting holes are provided on the square platform.

[0010] Compared with the prior art, the utility model has the following beneficial effects:

[0011] 1. The utility model directs the water flow from the water inlet of the water inlet and outlet section to the blade assembly structure, and the motor drives the blade assembly structure to rotate, so that the blade assembly structure drives the water flow to accelerate upward step by step, and then flows from the water outlet end of the blade assembly structure into the sleeve and flows downward along the sleeve to the water outlet, thereby completing the improvement of the water flow rate and pressure. When the motor speed is at the maximum and the water flow rate and pressure still need to be increased, the sleeve and the blade assembly structure are taken out and replaced with longer specifications, so that the water flow rate and pressure can be further improved, and at the same time, it is convenient to remove impurities caused by water flow inside the sleeve and the blade assembly structure. The sleeve is wrapped inside by the first circular groove and the second circular groove, and the sleeve is fixed while preventing water leakage.

[0012] 2. The blade assembly structure of the utility model can accelerate the water flow step by step. Water first enters the impeller from the water inlet of the lowest impeller unit. The water flows out from the upper part of the impeller as the impeller rotates, and then is collected by the middle section of the impeller. The pressure of the water flow's own rotation sends it to the impeller of the upper impeller unit. The water flows out from the upper part as the impeller rotates, and then is collected by the middle section of the impeller, and then circulates to the impeller of the uppermost impeller unit. The water flows out from the upper part as the impeller rotates, and then flows out from the water outlet. In this process, the flow rate and pressure of the water flow are increased due to the action of centrifugal force, and the water discharge requirements of different lifts are achieved. If it is necessary to change the final flow rate and pressure of the water flow, it can be achieved by increasing or decreasing the number of intermediate parts.

[0013] 3. The fastening mechanism of the utility model is achieved by first aligning the motor seat with the water inlet and outlet sections, then inserting the pull rod through the through hole, and screwing the second threaded portion at the lower end of the pull rod into the threaded hole of the water inlet and outlet sections, and then screwing a nut on the second threaded portion at the upper end of the pull rod and tightening it, thereby achieving the motor seat and the water inlet and outlet sections to fix the sleeve while preventing water leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the utility model;

[0015] Figure 2 It is a schematic diagram of the internal structure of the utility model;

[0016] Figure 3 is a cross-sectional view of the blade assembly mechanism;

[0017] Figure 4 It is a schematic diagram of the structure of the impeller;

[0018] Figure 5 It is a structural diagram of the middle section.

[0019] The marks in the accompanying drawings are: 1-motor, 2-motor seat, 3-blade assembly structure, 4-first circular groove, 5-water inlet and outlet section, 6-second circular groove, 7-sleeve, 8-water inlet, 9-water outlet, 10-fastening mechanism, 11-pump shaft, 12-limiting ring, 13-impeller unit, 16-impeller, 17-middle section, 18-sleeve, 19-water outlet, 20-water inlet, 26-through hole, 27-threaded hole, 28-pull rod, 29-second threaded part, 31-nut, 32-pressure gauge, 33-annular protrusion, 34-pressure measuring channel, 35-square table, 36-connecting hole. DETAILED DESCRIPTION

[0020] The present invention is further described below in conjunction with the accompanying drawings and embodiments, but they are not intended to limit the present invention.

[0021] Embodiment: A vertical multistage pump, comprising: Figure 1-5 As shown, it includes a motor 1, the output end of the motor 1 is connected to a motor base 2, the lower end of the motor base 2 is connected to a coupling, and the other end of the coupling is connected to a pump shaft 11 of a blade assembly structure 3; a first circular groove 4 is provided below the motor base 2; a water inlet and outlet section 5 is provided at the lower end of the blade assembly structure 3, a second circular groove 6 is provided above the water inlet and outlet section 5, a sleeve 7 is provided between the second circular grooves 6, and the sleeve 7 is wrapped inside by the first circular groove 4 and the second circular groove 6, so as to fix the sleeve 7 and prevent water leakage; the sleeve 7 is made of stainless steel, and the sleeve 7 surrounds the outer side of the blade assembly structure 3; as shown Figure 2 As shown, the water inlet and outlet section 5 is provided with a water inlet 8, which is in communication with the water inlet end of the blade assembly structure 3; the water inlet and outlet section 5 is provided with a water outlet 9, which is in communication with the inside of the sleeve 7; a fastening mechanism 10 is provided between the motor base 2 and the water inlet and outlet section 5. A pressure measuring channel 34 is provided at the end of the water outlet 9 of the water inlet and outlet section 5, and a pressure gauge 32 is connected to the outer end of the pressure measuring channel 34. The pressure gauge 32 is used to measure the pressure of the water flow after the speed is increased by the utility model. An annular protrusion 33 is provided below the motor base 2, and the annular protrusion 33 is located on the inner side of the inner wall of the middle section 17 and fits closely. The annular protrusion 33 prevents the middle section 17 from being tilted by the impact of the water flow. A square platform 35 is provided at the lower end of the water inlet and outlet section 5, and four connecting holes 36 distributed in a circular array are provided on the square platform 35.

[0022] like Figure 3 As shown, the blade assembly structure 3 includes a pump shaft 11, and a limit ring 12 is provided at the upper end of the pump shaft 11; the pump shaft 11 is provided with a plurality of impeller units 13 located below the limit ring 12 and stacked in sequence; Figure 4 As shown, the impeller unit 13 includes an impeller 16, as shown in Figure 5The outer sleeve of the impeller 16 shown is provided with a middle section 17; a shaft sleeve 18 is provided below the impeller 16, and the shaft sleeve 18 passes through the middle section 17 and contacts the impeller 16 of another impeller unit 13 below; a water outlet 19 is provided on the side of the middle section 17 of the uppermost impeller unit 13; and a water inlet 20 is provided in the middle section 17 of the lowermost impeller unit 13. Water first enters the impeller 16 from the water inlet 20 of the bottom impeller unit 13, and the water flows out from the upper part of the impeller 16 as the impeller 16 rotates, and then is collected by the middle section 17 that wraps the impeller 16. The pressure of the water's own rotation sends it to the impeller 16 of the upper impeller unit 13, and the water flows out from the upper part as the impeller 16 rotates, and then is collected by the middle section 17 that wraps the impeller 16, and thus circulates to the impeller 16 of the top impeller unit 13, and the water flows out from the upper part as the impeller 16 rotates, and then flows out from the water outlet 19. In this process, the flow rate and pressure of the water flow are increased due to the action of centrifugal force, so as to achieve the water discharge requirements of different lifts. If it is necessary to change the final flow rate and pressure of the water flow, it can be achieved by increasing or decreasing the number of intermediate parts.

[0023] like Figure 1 As shown in Figure 2, the fastening mechanism 10 includes a plurality of through holes 26 disposed below the motor base 2 and a plurality of threaded holes 27 disposed above the water inlet and outlet section 5, and the threaded holes 27 correspond to the through holes 26 one by one; a pull rod 28 is disposed between the threaded holes 27 and the through holes 26, and a second threaded portion 29 is disposed at both ends of the pull rod 28, wherein the second threaded portion 29 at one end matches the threaded hole 27, and the second threaded portion 29 at the other end passes through the through hole 26 and is connected with a nut 31. The fastening mechanism 10 firstly places the motor base 2 and the water inlet and outlet section 5 opposite to each other, and then passes the pull rod 28 through the through hole 26, and screws the second threaded portion 29 at the lower end of the pull rod 28 into the threaded hole 27 of the water inlet and outlet section 5, and then screws the nut 31 on the second threaded portion 29 at the upper end of the pull rod 28 and tightens it, thereby achieving the goal that the motor base 2 and the water inlet and outlet section 5 fix the sleeve 7 while preventing water leakage.

[0024] Working principle:

[0025] First, connect the connection hole 36 on the square platform 35 with the external base to fix the utility model, and then connect the outer end of the outlet channel 9 of the water inlet and outlet section 5 and the outer end of the water inlet 8 to the pipe, and the water flows from the water inlet 8 of the water inlet and outlet section 5 to the blade assembly structure 3, and the motor 1 drives the blade assembly structure 3 to rotate, so that the blade assembly structure 3 drives the water flow to accelerate upward step by step, and then the water flows from the water outlet hole 19 of the blade assembly structure 3 to the sleeve 7 and flows down along the sleeve 7 to the outlet channel 9 to flow out, thereby completing the increase of the water flow rate and pressure. When the motor 1 has the maximum speed and it is still necessary to increase the water flow rate and pressure, the sleeve 7 and the blade assembly structure 3 are removed by removing the nut 31 and the pull rod 28 of the fastening mechanism 10, and replaced with a longer sleeve 7 and a blade assembly structure 3 with more impeller units 13 stacked, so that the water flow rate and pressure can be further increased, and at the same time, it is convenient to remove impurities caused by water flow inside the sleeve 7 and the blade assembly structure 3.

Claims

1. A vertical multistage pump, comprising a motor (1), wherein the output end of the motor (1) is connected to a motor base (2), characterized in that: The lower end of the motor seat (2) is connected to a blade assembly structure (3), and the upper end of the blade assembly structure (3) passes through the motor seat (2) and is connected to the motor (1); the lower end of the motor seat (2) is provided with a first circular groove (4); the lower end of the blade assembly structure (3) is provided with a water inlet and outlet section (5), and the upper part of the water inlet and outlet section (5) is provided with a second circular groove (6), and a sleeve (7) is provided between the second circular groove (6) and the first circular groove (4), and the sleeve (7) surrounds the outer side of the blade assembly structure (3); the water inlet and outlet section (5) is provided with a water inlet (8), and the water inlet (8) is communicated with the water inlet end of the blade assembly structure (3); the water inlet and outlet section (5) is provided with a water outlet (9), and the water outlet (9) is communicated with the inside of the sleeve (7) The blade assembly structure (3) comprises a pump shaft (11), and a limit ring (12) is provided at the upper end of the pump shaft (11); a plurality of impeller units (13) are provided on the pump shaft (11) and are located below the limit ring (12) and are stacked in sequence; the impeller unit (13) comprises an impeller (16), and a middle section (17) is provided on the outer sleeve of the impeller (16); a shaft sleeve (18) is provided below the impeller (16), and the shaft sleeve (18) passes through the middle section (17) and contacts the impeller (16) of another impeller unit (13) below; a water outlet (19) is provided on the side of the middle section (17) of the uppermost impeller unit (13); and a water inlet (20) is provided on the middle section (17) of the lowermost impeller unit (13).

2. The vertical multistage pump according to claim 1, characterized in that: A fastening mechanism (10) is provided between the motor seat (2) and the water inlet and outlet sections (5), and the fastening mechanism (10) includes a plurality of through holes (26) provided below the motor seat (2) and a plurality of threaded holes (27) provided above the water inlet and outlet sections (5), wherein the threaded holes (27) correspond to the through holes (26) one by one; a pull rod (28) is provided between the threaded holes (27) and the through holes (26), and a second threaded portion (29) is provided at both ends of the pull rod (28), wherein the second threaded portion (29) at one end cooperates with the threaded hole (27), and the second threaded portion (29) at the other end passes through the through hole (26) and is connected to a nut (31).

3. The vertical multistage pump according to claim 1, characterized in that: A pressure measuring channel (34) is provided at the end of the water outlet channel (9) of the water inlet and outlet section (5), and a pressure gauge (32) is connected to the outer end of the pressure measuring channel (34).

4. The vertical multistage pump according to claim 2, characterized in that: An annular protrusion (33) is provided below the motor seat (2), and the annular protrusion (33) is located on the inner side of the inner wall of the middle section (17) and fits closely to the inner wall.

5. The vertical multistage pump according to claim 1, characterized in that: A square platform (35) is provided at the lower end of the water inlet and outlet section (5), and a plurality of connection holes (36) are provided on the square platform (35).

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