Limiting structure for installation of submersible sewage pump

Abstract

The utility model relates to the technical field of submersible sewage pumps, in particular to a submersible sewage pump installation limiting structure which comprises a motor body and a rotor shaft extending out of the motor body, a framework oil seal chamber is fixedly installed at one end of the motor body, a spring is connected to one end of the motor body, and a mechanical seal pressing plate is fixedly connected to one end of the spring. The limiting tool is inserted into the annular cavity connected to the framework oil seal chamber, the gap between the framework oil seal chamber and the rotor shaft can be reduced through the limiting tool, the space between the framework oil seal chamber and the rotor shaft can be reduced through the limiting tool, the space between the framework oil seal chamber and the rotor shaft can be reduced, and the space between the framework oil seal chamber and the rotor shaft can be reduced. The limiting tool can play a role in limiting the rotor shaft, so that the rotor shaft does not incline equivalent to a framework oil seal chamber, and the situation that the rotor shaft inclines, the rotor shaft collides with the mechanical sealing static ring, a sealing pair of the mechanical sealing static ring is broken, and the sealing capacity of the framework oil seal chamber is affected is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of submersible sewage pumps, in particular to a submersible sewage pump installation limiting structure. Background Art

[0002] Submersible sewage pump is a submersible sewage pump, which is particularly suitable for conveying liquids containing hard solids, fibers, and particularly dirty, sticky and slippery liquids.

[0003] In the prior art, there is a submersible sewage pump proposed in patent application number "CN201320024504.8", which is characterized by comprising: a base having a sewage inlet; a pump body installed on the base, having a medium flow cavity, and the cavity has an inlet communicated with the base and a sewage outlet, and the axes of the inlet and the sewage outlet are perpendicular to each other; an impeller installed in the medium flow cavity; and an oil tank installed on the pump body.

[0004] However, in the above patent application, the installed pump shaft extends directly from the oil tank, and there is a lack of limit for the installed pump shaft. The installed pump shaft may tilt, causing collision between the installed pump shaft and the sealing structure, resulting in damage to the sealing structure and affecting the sealing ability of the oil tank. Utility Model Content

[0005] The utility model aims to provide a submersible sewage pump installation limit structure to solve the problems raised in the above background technology.

[0006] The purpose of the utility model can be achieved through the following technical solutions:

[0007] A submersible sewage pump installation limit structure comprises a motor body and a rotor shaft extending from the motor body, one end of the motor body is fixedly mounted with a skeleton oil seal chamber, one end of the motor body is connected to a spring, one end of the spring is fixedly connected to a mechanical seal pressure plate, the mechanical seal pressure plate is fixedly connected to a mechanical seal static ring, the spring, the mechanical seal pressure plate and the mechanical seal static ring are all sleeved on the outer surface of the rotor shaft.

[0008] An annular fixing piece is fixedly connected in the skeleton oil seal chamber, and a cavity for accommodating a static ring of a mechanical seal is formed in the annular fixing piece. An annular cavity is arranged on the outer surface of the skeleton oil seal chamber. One end of the rotor shaft passes through the skeleton oil seal chamber and extends to the outside of the skeleton oil seal chamber. A limiting tool is sleeved on the rotor shaft, and a clamping ring is fixedly connected to one end of the limiting tool, and the clamping ring and the annular cavity are adapted to each other.

[0009] Preferably, one end of the motor body is fixedly connected to a first flange, one side of the first flange is fixedly connected to a sealing gasket, the outer surface of the skeleton oil seal chamber is fixedly connected to a second flange, and the second flange is provided with a first fixing bolt. The first fixing bolt passes through the second flange and the sealing gasket and is threadedly connected to the first flange, so as to fix the skeleton oil seal chamber to the motor body.

[0010] Preferably, the mechanical seal pressure plate is provided with a second fixing bolt, and the annular fixing piece is provided with a fixing screw hole used in cooperation with the second fixing bolt.

[0011] Preferably, a maintenance end cover is fixedly mounted on one end of the motor body away from the rotor shaft, and an outer surface of the maintenance end cover is fixedly connected to support legs in a ring array.

[0012] Preferably, a sealing inner ring is fixedly connected to one side of the maintenance end cover, and a sealing ring used in conjunction with the sealing inner ring is fixedly connected to the inner wall of the motor body.

[0013] Preferably, a closed side cover is fixedly installed on the side of the maintenance end cover away from the motor body, a lifting ring is fixedly installed on the closed side cover, the lifting ring is provided with lifting holes in a circular array, and an elastic pad is fixedly connected to the side of the lifting ring away from the maintenance end cover.

[0014] Beneficial effects of the utility model:

[0015] The utility model inserts a limiting tool into the annular cavity connected to the skeleton oil seal chamber. The limiting tool can reduce the gap between the skeleton oil seal chamber and the rotor shaft. The limiting tool can limit the rotor shaft, so that the rotor shaft will not tilt relative to the skeleton oil seal chamber, thereby preventing the rotor shaft from tilting and the rotor shaft from colliding with the mechanical seal static ring, causing the sealing pair of the mechanical seal static ring to rupture, thereby affecting the sealing ability of the skeleton oil seal chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the drawings required for use in the embodiments or the prior art description are briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 This utility model Figure 1 The enlarged view of point A in the middle;

[0019] Figure 3 This utility model Figure 1 A schematic diagram of the structure of one end of the motor body;

[0020] Figure 4 This utility model Figure 3 Schematic diagram of the connection between the middle maintenance end cover and the motor body;

[0021] Figure 5 This utility model Figure 4 Rear view of the middle maintenance cover,

[0022] The reference numerals in the figures are as follows:

[0023] 1. Motor body, 2. Rotor shaft, 3. Skeleton oil seal chamber, 301, annular cavity, 4. Spring, 5. Mechanical seal pressure plate, 6. Mechanical seal static ring, 7. Annular fixing part, 8. Limiting tool, 801, clamping ring, 9. First flange, 10. Sealing gasket, 11. Second flange, 12. First fixing bolt, 13. Second fixing bolt, 14. Fixing screw hole, 15. Maintenance end cover, 16. Support leg, 17. Sealing inner ring, 18. Sealing ring, 19. Lifting ring, 20. Lifting hole, 21. Elastic pad, 22. Closed side cover. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] A submersible sewage pump installation limit structure includes a motor body 1 and a rotor shaft 2 extending from the motor body 1, one end of the motor body 1 is fixedly installed with a skeleton oil seal chamber 3, one end of the motor body 1 is connected to a spring 4, one end of the spring 4 is fixedly connected to a mechanical seal pressure plate 5, the mechanical seal pressure plate 5 is fixedly connected to a mechanical seal static ring 6, the spring 4, the mechanical seal pressure plate 5 and the mechanical seal static ring 6 are all sleeved on the outer surface of the rotor shaft 2.

[0026] An annular fixing part 7 is fixedly connected inside the skeleton oil seal chamber 3, and a cavity for accommodating a mechanical seal static ring 6 is provided inside the annular fixing part 7. An annular cavity 301 is provided on the outer surface of the skeleton oil seal chamber 3. One end of the rotor shaft 2 passes through the skeleton oil seal chamber 3 and extends to the outside of the skeleton oil seal chamber 3. A limiting tool 8 is sleeved on the rotor shaft 2. A clamping ring 801 is fixedly connected to one end of the limiting tool 8. The clamping ring 801 is adapted to the annular cavity 301.

[0027] like Figure 1The motor body 1 and the rotor shaft 2 are both prior art. The motor body 1 can drive the rotor shaft 2 to rotate. A sealing pair is provided on the mechanical seal static ring 6 to achieve sealing with the rotor shaft 2. The limiting tool 8 is a tubular workpiece.

[0028] One end of the motor body 1 is fixedly connected to a first flange 9, one side of the first flange 9 is fixedly connected to a sealing gasket 10, the outer surface of the skeleton oil seal chamber 3 is fixedly connected to a second flange 11, and the second flange 11 is provided with a first fixing bolt 12. The first fixing bolt 12 passes through the second flange 11 and the sealing gasket 10 and is threadedly connected to the first flange 9, so as to fix the skeleton oil seal chamber 3 to the motor body 1.

[0029] like Figure 1 The first flange 9 and the second flange 11 are fixed together by the first fixing bolt 12 to realize the installation of one end of the skeleton oil seal chamber 3 on the motor body 1, and the sealing gasket 10 provides sealing between the skeleton oil seal chamber 3 and the motor body 1. The skeleton oil seal chamber 3 is also provided with a flange structure connected to the submersible sewage pump casing. When the skeleton oil seal chamber 3 is installed on the submersible sewage pump casing, one end of the limiting fixture 8 is clamped in the annular cavity 301 of the skeleton oil seal chamber 3 through the clamping ring 801, and the other end is pressed against the submersible sewage pump casing, which can cooperate with the submersible sewage pump casing to clamp the limiting fixture 8.

[0030] The mechanical seal pressing plate 5 is provided with a second fixing bolt 13 , and the annular fixing member 7 is provided with a fixing screw hole 14 used in conjunction with the second fixing bolt 13 .

[0031] like Figure 1 and Figure 2 and Figure 3 The mechanical seal pressure plate 5 can be fixed on the annular fixing member 7 by means of the second fixing bolt 13 and the fixing screw hole 14, so that the mechanical seal static ring 6 is inserted into the cavity in the annular fixing member 7, so that the mechanical seal static ring 6 can provide better sealing ability.

[0032] A maintenance cover 15 is fixedly mounted on one end of the motor body 1 away from the rotor shaft 2 , and an outer surface of the maintenance cover 15 is fixedly connected to support legs 16 in a ring array.

[0033] like Figure 3 , Figure 4 and Figure 5 The maintenance end cover 15 can be fixed to the motor body 1 by bolts, and the support legs 16 can provide support for the motor body 1 when the motor body 1 is vertically arranged upward to keep the motor body 1 level.

[0034] A sealing inner ring 17 is fixedly connected to one side of the maintenance end cover 15 , and a sealing ring 18 used in conjunction with the sealing inner ring 17 is fixedly connected to the inner wall of the motor body 1 .

[0035] like Figure 4 and Figure 5 When the maintenance end cover 15 is fixed to the motor body 1 , the sealing ring 18 is tightly sleeved onto the outer surface of the sealing inner ring 17 , which can further enhance the sealing ability between the maintenance end cover 15 and the motor body 1 .

[0036] A closed side cover 22 is fixedly installed on the side of the maintenance end cover 15 away from the motor body 1, and a lifting ring 19 is fixedly installed on the closed side cover 22. The lifting ring 19 is provided with lifting holes 20 in a circular array, and an elastic pad 21 is fixedly connected to the side of the lifting ring 19 away from the maintenance end cover 15.

[0037] like Figure 3 The closed side cover 22 can be fixed to the maintenance end cover 15 by a bolt structure. One side of the lifting ring 19 and one end of the supporting leg 16 are located in the same plane, and can jointly provide support for the motor body 1. The external lifting rope passes through the lifting hole 20 to assist in lifting the motor body 1, which facilitates the transportation of the motor body 1. The elastic pad 21 can provide protection for the lifting equipment when lowering the motor body 1.

[0038] Compared with the related art, the submersible sewage pump installation limit structure provided by the utility model has the following beneficial effects:

[0039] The utility model inserts the limiting tool 8 into the annular cavity 301 connected to the skeleton oil seal chamber 3, so that the limiting tool 8 can reduce the gap between the skeleton oil seal chamber 3 and the rotor shaft 2, and the limiting tool 8 can limit the rotor shaft 2, so that the rotor shaft 2 will not tilt relative to the skeleton oil seal chamber 3, and prevent the rotor shaft 2 from tilting, the rotor shaft 2 and the mechanical seal static ring 6 from colliding, resulting in the rupture of the sealing pair of the mechanical seal static ring 6, and affecting the sealing ability of the skeleton oil seal chamber 3.

[0040] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. A submersible sewage pump installation limit structure, comprising a motor body (1) and a rotor shaft (2) extending from the motor body (1), characterized in that: A skeleton oil seal chamber (3) is fixedly mounted on one end of the motor body (1), a spring (4) is connected to one end of the motor body (1), a mechanical seal pressure plate (5) is fixedly connected to one end of the spring (4), a mechanical seal static ring (6) is fixedly connected to the mechanical seal pressure plate (5), and the spring (4), the mechanical seal pressure plate (5) and the mechanical seal static ring (6) are all sleeved on the outer surface of the rotor shaft (2); An annular fixing part (7) is fixedly connected inside the skeleton oil seal chamber (3), and a cavity for accommodating a mechanical seal static ring (6) is provided inside the annular fixing part (7). An annular cavity (301) is provided on the outer surface of the skeleton oil seal chamber (3). One end of the rotor shaft (2) passes through the skeleton oil seal chamber (3) and extends to the outside of the skeleton oil seal chamber (3). A limiting tool (8) is sleeved on the rotor shaft (2), and a clamping ring (801) is fixedly connected to one end of the limiting tool (8). The clamping ring (801) and the annular cavity (301) are adapted to each other.

2. A submersible sewage pump installation limiting structure according to claim 1, characterized in that: One end of the motor body (1) is fixedly connected to a first flange (9), one side of the first flange (9) is fixedly connected to a sealing gasket (10), the outer surface of the skeleton oil seal chamber (3) is fixedly connected to a second flange (11), the second flange (11) is provided with a first fixing bolt (12), the first fixing bolt (12) passes through the second flange (11) and the sealing gasket (10) and is threadedly connected to the first flange (9), and is used to fix the skeleton oil seal chamber (3) to the motor body (1).

3. A submersible sewage pump installation limiting structure according to claim 1, characterized in that: The mechanical seal pressure plate (5) is provided with a second fixing bolt (13), and the annular fixing member (7) is provided with a fixing screw hole (14) for use with the second fixing bolt (13).

4. A submersible sewage pump installation limiting structure according to claim 1, characterized in that: A maintenance end cover (15) is fixedly mounted on one end of the motor body (1) away from the rotor shaft (2), and support legs (16) in a ring array are fixedly connected to the outer surface of the maintenance end cover (15).

5. A submersible sewage pump installation limiting structure according to claim 4, characterized in that: A sealing inner ring (17) is fixedly connected to one side of the maintenance end cover (15), and a sealing ring (18) used in conjunction with the sealing inner ring (17) is fixedly connected to the inner wall of the motor body (1).

6. A submersible sewage pump installation limiting structure according to claim 4, characterized in that: A closed side cover (22) is fixedly mounted on the side of the maintenance end cover (15) away from the motor body (1); a lifting ring (19) is fixedly mounted on the closed side cover (22); the lifting ring (19) is provided with lifting holes (20) in a circular array; and an elastic protective pad (21) is fixedly connected to the side of the lifting ring (19) away from the maintenance end cover (15).

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