Pump head stretching type stainless steel multi-stage centrifugal pump

Abstract

The utility model belongs to the technical field of centrifugal pumps, and particularly relates to a pump head stretching type stainless steel multi-stage centrifugal pump. A motor assembly is arranged above the base, a motor body is arranged in the motor assembly, a control box is arranged above the motor assembly, a first pump head pressing plate is arranged on one side of the motor assembly, and a second pump head pressing plate is arranged on the outer side of the first pump head pressing plate. Meanwhile, a pump head outer plate is arranged between the first pump head pressing plate and the second pump head pressing plate, a stainless steel impeller and a stainless steel guide vane are arranged in the pump head outer plate, the stainless steel guide vane is fixed on a rotating shaft of the motor main body, and a water outlet assembly and a water inlet assembly are respectively arranged on the pump head outer plate. Under the condition that neutral mineral water with the solid particle content not larger than 15% and other similar sewage are conveyed, the scouring force and the pressure intensity on the internal structure are reduced, the service life of the internal structure is prolonged, and vibration is relieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of centrifugal pumps and relates to a pump head stretching type stainless steel multi-stage centrifugal pump. Background Art

[0002] A multistage centrifugal pump is a medium conveying device in which a flowing medium (gas and liquid, or a mixture of suspended particles and gas or liquid) enters from the root of the blade shaft (inlet), and the medium obtains centrifugal force by rotating the blades at high speed, generating a high pressure, and flows out from the pressure relief port (outlet). The significance of a multistage centrifugal pump is to increase the set pressure. Most existing multistage centrifugal pumps are vertical pipeline structures, with the inlet and outlet at the same level. When conveying neutral mineral water with a solid particle content of no more than 15% and other similar sewage, the scouring force and pressure on the internal structure are relatively large, resulting in a shortened service life of the internal structure and large vibration. Therefore, in response to the above problems, a pump head stretching stainless steel multistage centrifugal pump is proposed. Utility Model Content

[0003] The utility model aims to solve the above problems and provides a pump head stretching type stainless steel multi-stage centrifugal pump.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A pump head stretching stainless steel multi-stage centrifugal pump, comprising a base, a motor assembly is provided above the base, and a motor body is provided in the motor assembly, a control box is provided above the motor assembly, a first pump head pressure plate is provided on one side of the motor assembly, and a mechanical seal assembly is provided between the first pump head pressure plate and the motor body rotating shaft, and the mechanical seal assembly is sleeved on the motor body rotating shaft, a second pump head pressure plate is provided on the outer side of the first pump head pressure plate, and a pump head outer plate is provided between the first pump head pressure plate and the second pump head pressure plate, a stainless steel impeller is inserted into the pump head outer plate, and a stainless steel guide vane is inserted into the stainless steel impeller, and the stainless steel guide vane is sleeved outside the motor body rotating shaft, a water inlet assembly is provided in the middle of the front side of the pump head outer plate, and the water inlet assembly passes through the second pump head pressure plate, and an exhaust hole is provided above the middle of the front side of the pump head outer plate, a water outlet assembly is provided above the pump head outer plate, and a water drain assembly is provided on the side of the pump head outer plate.

[0006] In the above-mentioned pump head stretching stainless steel multi-stage centrifugal pump, the motor assembly is fixedly connected to the top of the base, and the motor body is fixedly connected inside the motor assembly. At the same time, the rotating shaft of the motor body passes through the motor assembly, and the control box is fixedly connected to the top of the motor assembly, and the motor body is electrically controlled inside the control box.

[0007] In the above-mentioned pump head stretching type stainless steel multi-stage centrifugal pump, one side of the motor assembly is fixedly connected to the first pump head pressure plate, and the rotating shaft of the motor body passes through the first pump head pressure plate, and a rotatably connected mechanical seal assembly is arranged on the outer middle part of the rotating shaft of the motor body, and the mechanical seal assembly is stuck in the middle of the first pump head pressure plate fixedly connected.

[0008] In the above-mentioned pump head stretching type stainless steel multi-stage centrifugal pump, the other side of the first pump head pressure plate is bolted and fixedly connected to the second pump head pressure plate, and the rotating shaft of the motor body is inserted into the center of the second pump head pressure plate, and the first pump head pressure plate and the second pump head pressure plate are clamped and fixedly connected with a pump head outer plate, and the rotating shaft of the motor body is inserted into the pump head outer plate.

[0009] In the pump head stretching stainless steel multi-stage centrifugal pump, a built-in groove is provided in the pump head outer plate, and a plurality of stainless steel impellers are fixedly connected in the built-in groove, and the rotating shaft of the motor body is inserted into the stainless steel impeller.

[0010] In the above-mentioned pump head stretching stainless steel multi-stage centrifugal pump, a stainless steel guide vane is rotatably connected to the stainless steel impeller, and there is a gap between the side of the stainless steel guide vane and the inner wall of the stainless steel impeller. A rotating shaft fixedly connected to the motor body is inserted into the stainless steel guide vane.

[0011] In the above-mentioned pump head stretching stainless steel multi-stage centrifugal pump, the front center of the pump head outer plate is fixedly connected to the water inlet assembly, and the inside of the water inlet assembly is connected to the inside of the pump head outer plate, and there is a distance between the outer wall of the water inlet assembly and the inner wall of the middle hole of the second pump head pressure plate.

[0012] In the above-mentioned pump head stretching type stainless steel multi-stage centrifugal pump, a water outlet assembly is fixedly connected to the top of the pump head outer plate, and the inside of the water outlet assembly is communicated with the inside of the pump head outer plate.

[0013] In the above pump head stretching stainless steel multi-stage centrifugal pump, there is a distance between the water discharge port assembly and the inner side of the first pump head pressure plate and the inner side of the second pump head pressure plate, and the water discharge port assembly is connected to the inner side of the pump head outer plate.

[0014] In the above pump head stretching stainless steel multi-stage centrifugal pump, a convex portion is provided outside the exhaust hole, and the convex portion is placed above the second pump head pressure plate, and the exhaust hole is connected to the inside of the pump head outer plate.

[0015] Compared with the existing technology, the advantages of the utility model are:

[0016] The utility model is provided with a motor assembly above the base, and a motor body is provided inside the motor assembly, a control box is provided above the motor assembly, a first pump head pressure plate is provided on one side of the motor assembly, and a second pump head pressure plate is provided outside the first pump head pressure plate, and a pump head outer plate is provided between the first pump head pressure plate and the second pump head pressure plate, a stainless steel impeller and a stainless steel guide vane are provided inside the pump head outer plate, and the stainless steel guide vane is fixed on the rotating shaft of the motor body, and a water outlet assembly and a water inlet assembly are respectively provided on the pump head outer plate, and the inlet and outlet are not at the same level, so that the scouring force and pressure on the internal structure are reduced when conveying neutral mineral water with a solid particle content of not more than 15% and other similar sewage, thereby increasing the life of the internal structure and reducing vibration.

[0017] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is an overall schematic diagram of the utility model;

[0019] Figure 2 This is a schematic diagram of the stainless steel impeller and motor assembly of the utility model.

[0020] Figure 3 This is a schematic diagram of the cooperation between the stainless steel guide vane and the motor assembly of the utility model;

[0021] Figure 4 This is a schematic diagram of the cooperation between the pump head outer plate and the stainless steel impeller of the utility model;

[0022] Figure 5 It is a schematic diagram of the cooperation between the stainless steel impeller and the stainless steel guide vane on the outer plate of the pump head of the utility model.

[0023] In the figure: 1. Base; 2. Motor assembly; 21. Motor body; 3. Control box; 4. First pump head pressure plate; 5. Second pump head pressure plate; 6. Pump head outer plate; 61. Built-in groove; 7. Stainless steel impeller; 8. Stainless steel guide vane; 9. Mechanical seal assembly; 10. Water outlet assembly; 11. Water inlet assembly; 12. Drain assembly; 13. Exhaust hole. DETAILED DESCRIPTION

[0024] The utility model is further described below in conjunction with the accompanying drawings.

[0025] like Figure 1-5As shown, a pump head stretching stainless steel multistage centrifugal pump includes a base 1, a motor assembly 2 is arranged above the base 1, and a motor body 21 is arranged inside the motor assembly 2, a control box 3 is arranged above the motor assembly 2, a first pump head pressure plate 4 is arranged on one side of the motor assembly 2, and a mechanical seal assembly 9 is arranged between the first pump head pressure plate 4 and the rotating shaft of the motor body 21, and the mechanical seal assembly 9 is sleeved on the rotating shaft of the motor body 21, a second pump head pressure plate 5 is arranged outside the first pump head pressure plate 4, and the first pump head pressure plate A pump head outer plate 6 is provided between 4 and the second pump head pressure plate 5, a stainless steel impeller 7 is inserted into the pump head outer plate 6, a stainless steel guide vane 8 is inserted into the stainless steel impeller 7, the stainless steel guide vane 8 is sleeved outside the rotating shaft of the motor body 21, a water inlet assembly 11 is provided in the middle of the front face of the pump head outer plate 6, and the water inlet assembly 11 passes through the second pump head pressure plate 5, and an exhaust hole 13 is provided above the middle of the front face of the pump head outer plate 6, a water outlet assembly 10 is provided above the pump head outer plate 6, and a water drain assembly 12 is provided on the side of the pump head outer plate 6.

[0026] The motor assembly 2 is fixedly connected to the top of the base 1, and the motor body 21 is fixedly connected inside the motor assembly 2. At the same time, the rotating shaft of the motor body 21 passes through the motor assembly 2, the control box 3 is fixedly connected to the top of the motor assembly 2, and the motor body 21 is electrically connected and controlled inside the control box 3.

[0027] A motor assembly 2 is disposed above the base 1 , and a motor body 21 is disposed inside the motor assembly 2 . A control box 3 disposed above the motor assembly 2 is used to start and stop the motor body 21 .

[0028] Furthermore, one side of the motor assembly 2 is fixedly connected to the first pump head pressure plate 4, and the rotating shaft of the motor body 21 passes through the first pump head pressure plate 4. A rotatably connected mechanical seal assembly 9 is arranged outside the middle of the rotating shaft of the motor body 21, and the mechanical seal assembly 9 is inserted into the middle of the first pump head pressure plate 4 that is fixedly connected.

[0029] Furthermore, the other side of the first pump head pressure plate 4 is bolted and fixedly connected to the second pump head pressure plate 5, and the rotating shaft of the motor body 21 is inserted into the center of the second pump head pressure plate 5, and a pump head outer plate 6 is inserted and fixedly connected between the first pump head pressure plate 4 and the second pump head pressure plate 5, and the rotating shaft of the motor body 21 is inserted into the pump head outer plate 6.

[0030] A first pump head pressure plate 4 is provided on one side of the motor assembly 2, and a pump head outer plate 6 is provided between the first pump head pressure plate 4 and the second pump head pressure plate 5, so that the motor assembly 2 and the pump head outer plate 6 are formed into one body by the cooperation of the first pump head pressure plate 4 and the second pump head pressure plate 5, and the internal sealing is tight, so that the rotating shaft of the motor body 21 inside the motor assembly 2 can drive the parts to work inside the pump head outer plate 6.

[0031] Furthermore, a built-in groove 61 is opened in the pump head outer plate 6 , and a plurality of stainless steel impellers 7 are fixedly connected in the built-in groove 61 , and the rotating shaft of the motor body 21 is inserted into the stainless steel impeller 7 .

[0032] Furthermore, a stainless steel guide vane 8 is rotatably connected to the stainless steel impeller 7 , and there is a gap between the side surface of the stainless steel guide vane 8 and the inner wall of the stainless steel impeller 7 , and a rotating shaft fixedly connected to the motor body 21 is inserted into the stainless steel guide vane 8 .

[0033] A stainless steel impeller 7 is provided inside the pump head outer plate 6, and a stainless steel guide vane 8 is provided inside the stainless steel impeller 7. After the stainless steel guide vane 8 is fixed to the rotating shaft of the motor body 21, the motor body 21 is started, which can drive the stainless steel guide vane 8 to rotate, so that the entire centrifugal pump starts to work.

[0034] Furthermore, the front center of the pump head outer plate 6 is fixedly connected to the water inlet assembly 11 , and the inside of the water inlet assembly 11 is connected to the inside of the pump head outer plate 6 , and there is a distance between the outer wall of the water inlet assembly 11 and the inner wall of the middle hole of the second pump head pressure plate 5 .

[0035] Furthermore, a water outlet assembly 10 is fixedly connected to the top of the pump head outer plate 6 , and the interior of the water outlet assembly 10 is communicated with the interior of the pump head outer plate 6 .

[0036] A water inlet assembly 11 and a water outlet assembly 10 are respectively provided on the outer plate 6 of the pump head, and the two are in different directions, forming a 90-degree direction. When the centrifugal pump is working, water enters the water inlet assembly 11 and then goes out from the water outlet assembly 10 through the internal structure, so that there is no direct flushing force and pressure on the internal structure.

[0037] Furthermore, there is a distance between the water discharge port assembly 12 and the inner side of the first pump head pressure plate 4 and the inner side of the second pump head pressure plate 5 , respectively, and the water discharge port assembly 12 is connected to the inner side of the pump head outer plate 6 .

[0038] Furthermore, a convex portion is provided outside the exhaust hole 13 , and the convex portion is placed above the second pump head pressure plate 5 , and the exhaust hole 13 is communicated with the inside of the pump head outer plate 6 .

[0039] A drain port assembly 12 and an exhaust hole 13 are respectively provided on the pump head outer plate 6. The drain port assembly 12 can discharge the sewage accumulated inside when not working. The exhaust hole 13 is used to discharge the gas inside when the centrifugal pump starts working so that it can work normally.

[0040] Working principle:

[0041] A motor assembly 2 is provided above the base 1, and a motor body 21 is provided inside the motor assembly 2. A control box 3 is provided above the motor assembly 2. The motor body 21 is controlled by the control box 3 so that the entire centrifugal pump can start and stop normally. A first pump head pressure plate 4 is provided on one side of the motor assembly 2, and a second pump head pressure plate 5 is provided outside the first pump head pressure plate 4. A pump head outer plate 6 is provided between the first pump head pressure plate 4 and the second pump head pressure plate 5. In this way, the motor assembly 2, the first pump head pressure plate 4, the pump head outer plate 6 and the second pump head pressure plate The plate 5 forms a tight whole, a stainless steel impeller 7 and a stainless steel guide vane 8 are arranged inside the pump head outer plate 6, and the stainless steel guide vane 8 is fixed on the rotating shaft of the motor body 21, and is driven by the motor body 21 after starting, so that the inside works normally, and an outlet assembly 10 and a water inlet assembly 11 are respectively arranged on the pump head outer plate 6. Since the two are in a 90-degree direction, when working normally, the sewage that enters and carries the particles will not be directly flushed to the internal structure, forming a detour at an angle, thereby reducing the internal flushing force and pressure.

[0042] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways without departing from the spirit of the present invention.

[0043] Although this article uses more terms such as 1, base; 2, motor assembly; 21, motor body; 3, control box; 4, first pump head pressure plate; 5, second pump head pressure plate; 6, pump head outer plate; 61, built-in groove; 7, stainless steel impeller; 8, stainless steel guide vane; 9, mechanical seal assembly; 10, water outlet assembly; 11, water inlet assembly; 12, drain assembly; 13, exhaust hole, etc., it does not exclude the possibility of using other terms. The use of these terms is only for more convenient description and explanation of the essence of the utility model. It is contrary to the spirit of the utility model to interpret them as any additional restrictions.

Claims

1. A pump head stretching stainless steel multistage centrifugal pump, comprising a base (1), characterized in that: A motor assembly (2) is provided above the base (1), and a motor body (21) is provided inside the motor assembly (2), a control box (3) is provided above the motor assembly (2), a first pump head pressure plate (4) is provided on one side of the motor assembly (2), and a mechanical seal assembly (9) is provided between the first pump head pressure plate (4) and the rotating shaft of the motor body (21), and the mechanical seal assembly (9) is sleeved on the rotating shaft of the motor body (21), a second pump head pressure plate (5) is provided outside the first pump head pressure plate (4), and a second pump head pressure plate (5) is provided between the first pump head pressure plate (4) and the second pump head pressure plate (5). A pump head outer plate (6) is provided, a stainless steel impeller (7) is inserted into the pump head outer plate (6), and a stainless steel guide vane (8) is inserted into the stainless steel impeller (7), and the stainless steel guide vane (8) is sleeved outside the rotating shaft of the motor body (21), a water inlet assembly (11) is provided in the middle of the front face of the pump head outer plate (6), and the water inlet assembly (11) passes through the second pump head pressure plate (5), and an exhaust hole (13) is provided above the middle of the front face of the pump head outer plate (6), a water outlet assembly (10) is provided above the pump head outer plate (6), and a water drain assembly (12) is provided on the side of the pump head outer plate (6).

2. The pump head stretching stainless steel multistage centrifugal pump according to claim 1 is characterized in that: The base (1) is fixedly connected to the motor assembly (2) at the top, and the motor assembly (2) is fixedly connected to the motor body (21), while the rotating shaft of the motor body (21) passes through the motor assembly (2), and the motor assembly (2) is fixedly connected to the control box (3) at the top, and the control box (3) is electrically connected to control the motor body (21).

3. The pump head stretching stainless steel multistage centrifugal pump according to claim 2 is characterized in that: One side of the motor assembly (2) is fixedly connected to the first pump head pressure plate (4), and the first pump head pressure plate (4) passes through the rotating shaft of the motor body (21). The middle part of the rotating shaft of the motor body (21) is provided with a rotatably connected mechanical seal assembly (9) on the outer surface, and the mechanical seal assembly (9) is inserted into the middle of the first pump head pressure plate (4) that is fixedly connected.

4. The pump head stretching stainless steel multistage centrifugal pump according to claim 3 is characterized in that: The other side of the first pump head pressure plate (4) is fixedly connected to the second pump head pressure plate (5) by bolts, and the center of the second pump head pressure plate (5) is penetrated by the rotating shaft of the motor body (21), and the first pump head pressure plate (4) and the second pump head pressure plate (5) are clamped and fixedly connected with a pump head outer plate (6), and the rotating shaft of the motor body (21) is inserted into the pump head outer plate (6).

5. The pump head stretching stainless steel multistage centrifugal pump according to claim 4 is characterized in that: The pump head outer plate (6) is provided with a built-in groove (61), and a plurality of stainless steel impellers (7) are fixedly connected and inserted into the built-in groove (61), and the rotating shaft of the motor body (21) is inserted into the stainless steel impeller (7).

6. The pump head stretching stainless steel multistage centrifugal pump according to claim 5, characterized in that: A stainless steel guide vane (8) is inserted into the stainless steel impeller (7) for rotational connection, and a gap is provided between the side surface of the stainless steel guide vane (8) and the inner wall of the stainless steel impeller (7). A rotating shaft fixedly connected to the motor body (21) is inserted into the stainless steel guide vane (8).

7. The pump head stretching stainless steel multistage centrifugal pump according to claim 6, characterized in that: The front center of the pump head outer plate (6) is fixedly connected to the water inlet assembly (11), and the inside of the water inlet assembly (11) is connected to the inside of the pump head outer plate (6), and there is a distance between the outer wall of the water inlet assembly (11) and the inner wall of the middle hole of the second pump head pressure plate (5).

8. The pump head stretching stainless steel multistage centrifugal pump according to claim 7, characterized in that: The water outlet assembly (10) is fixedly connected to the top of the pump head outer plate (6), and the interior of the water outlet assembly (10) is in communication with the interior of the pump head outer plate (6).

9. The pump head stretching stainless steel multistage centrifugal pump according to claim 8, characterized in that: The water discharge port assembly (12) is spaced apart from the inner side of the first pump head pressure plate (4) and the inner side of the second pump head pressure plate (5), and the water discharge port assembly (12) is connected to the inside of the pump head outer plate (6).

10. The pump head stretching stainless steel multistage centrifugal pump according to claim 9, characterized in that: A convex portion is provided outside the exhaust hole (13), and the convex portion is placed above the second pump head pressure plate (5), and the exhaust hole (13) is communicated with the inside of the pump head outer plate (6).

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