Centrifugal pump sealing device and centrifugal pump

Abstract

The utility model discloses a centrifugal pump sealing device which comprises an installation plate, a sealing plate and a shaft plate which are sequentially arranged on the outer side of a pump body, the pump body is connected with the installation plate, and the sealing plate is respectively connected with the installation plate and the shaft plate. Wherein the inner wall of the end part of the mounting plate is connected with a limiting plate, and a limiting groove and a positioning groove are respectively formed in the limiting plate; the inner wall of the end of the sealing plate is connected with a rotating plate, the side, adjacent to the mounting plate, of the rotating plate is connected with a positioning plate, the positioning plate is matched with the limiting groove, and the rotating plate is used for rotating in the sealing plate so that the positioning plate can enter the positioning groove through the limiting groove; the sealing plate is further provided with a positioning piece for stabilizing the rotating plate, and the positioning piece is used for stabilizing the rotating plate when the positioning plate and the limiting groove are staggered. According to the centrifugal pump sealing device, positioning can be conducted in advance before the sealing plate is installed, and therefore a user can conduct positioning and installation conveniently.

Description

Technical Field

[0001] The utility model relates to the technical field of centrifugal pumps, in particular to a centrifugal pump sealing device and a centrifugal pump. Background Art

[0002] Centrifugal water pump is abbreviated as "centrifugal pump", also called "centrifugal pump". It is a kind of water pumping machine that uses the centrifugal motion of water. Before starting, the pump should be filled with water. After starting, the rotating impeller drives the water in the pump to rotate at high speed. The water moves centrifugally, is thrown out and pressed into the outlet pipe. After the water is thrown out, the pressure near the impeller decreases, and a low-pressure area is formed near the rotating shaft. In addition, the pump casing and the mounting shaft need to be sealed and installed during the operation of the centrifugal pump to ensure the water tightness.

[0003] The centrifugal pump sealing devices currently available on the market are generally positioned by means of flanges and bolts during installation, which is inconvenient for users to perform pre-positioning installation.

[0004] Therefore, the utility model proposes a new solution to the above problems. Utility Model Content

[0005] The utility model aims to solve the problem that a traditional centrifugal pump sealing device is inconvenient for a user to perform pre-positioning and installation, and provides a centrifugal pump sealing device.

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

[0007] In a first aspect of the utility model, a centrifugal pump sealing device is provided, comprising: a mounting plate, a sealing plate and an axis plate arranged in sequence on the outside of a pump body, the pump body being connected to the mounting plate, the sealing plate being connected to the mounting plate and the axis plate respectively;

[0008] Wherein, the inner wall of the end of the mounting plate is connected to the limiting plate, and the limiting plate is provided with a limiting groove and a positioning groove inside;

[0009] The inner wall of the end of the sealing plate is connected to a rotating plate, and a side of the rotating plate adjacent to the mounting plate is connected to a positioning plate, the positioning plate and the limiting groove are adapted to each other, and the rotating plate is used to rotate in the sealing plate so that the positioning plate passes through the limiting groove and enters the positioning groove;

[0010] The sealing plate is also provided with a positioning member for stabilizing the rotating plate, and the positioning member is used to stabilize the rotating plate when the positioning plate and the limiting groove are misaligned.

[0011] Furthermore, the number of the limiting plates is two, and the number of the rotating plates is two.

[0012] Furthermore, the mounting plate is made of aluminum alloy, and the sealing plate is made of aluminum alloy.

[0013] Furthermore, the mounting plate is embedded with a first sealing ring, and the sealing plate is embedded with a second sealing ring.

[0014] Furthermore, the first sealing ring is made of silicone material, and the second sealing ring is made of silicone material.

[0015] Furthermore, the number of the second sealing rings is three, and the diameters of the three second sealing rings increase exponentially.

[0016] Furthermore, the sealing plate is connected to the mounting plate via a plurality of mounting bolts, and the mounting bolts are equidistantly distributed in a ring shape about the axis of the sealing plate.

[0017] Furthermore, the shaft plate is connected to the sealing plate via a plurality of locking bolts, and the locking bolts are equidistantly distributed in a ring around the axis of the shaft plate.

[0018] Furthermore, the positioning member is a positioning bolt, and the positioning bolt passes through the sealing plate and extends to the outer wall of the rotating plate.

[0019] A second aspect of the utility model is a centrifugal pump, comprising the centrifugal pump sealing device.

[0020] Beneficial Effects

[0021] The centrifugal pump sealing device of the utility model rotates the rotating plate to rotate the positioning plate to a position matching the limiting groove, presses the sealing plate to make the positioning plate enter the limiting groove and then enter the positioning groove, rotates the rotating plate to form a misalignment between the positioning plate and the limiting groove, controls the stability of the rotating plate through the positioning member, and then connects the sealing plate to the mounting plate. The centrifugal pump sealing device of the utility model can be pre-positioned before installing the sealing plate, so that it is convenient for users to perform positioning and installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In the accompanying drawings, the following are given by way of example and not limitation:

[0023] Figure 1 A structural schematic diagram of a centrifugal pump sealing device provided in an embodiment of the utility model.

[0024] Figure 2 A schematic diagram of the disassembled structure of a centrifugal pump sealing device provided in an embodiment of the utility model.

[0025] Figure 3 A schematic cross-sectional structure diagram of a mounting plate of a centrifugal pump sealing device provided in an embodiment of the utility model.

[0026] Figure 4A side structural schematic diagram of a centrifugal pump sealing device provided in an embodiment of the utility model.

[0027] In the figure: 1. pump body; 2. mounting plate; 3. limit plate; 4. limit groove; 5. sealing plate; 6. rotating plate; 7. positioning plate; 8. positioning bolt; 9. mounting bolt; 10. shaft plate; 11. locking bolt; 12. first sealing ring; 13. second sealing ring; 14. positioning groove. DETAILED DESCRIPTION

[0028] In the following detailed disclosure, these embodiments are fully described with reference to the drawings. In order to make the technical scheme of the utility model more clear and specific to those skilled in the art, the implementation methods described below are not limited to this. The utility model is further described in detail below in combination with the embodiments and drawings.

[0029] In the present invention, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance; the term "plurality" refers to two or more, unless otherwise clearly defined. The terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0030] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by terms such as "up", "down", "left", "right", "front" and "back" are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation, and therefore, cannot be understood as a limitation on the present invention.

[0031] like Figure 1-Figure 4 As shown, the first aspect of the embodiment of the utility model provides a centrifugal pump sealing device, comprising: a mounting plate 2, a sealing plate 5 and an axis plate 10 arranged in sequence on the outside of a pump body 1, the pump body 1 is connected to the mounting plate 2, and the sealing plate 5 is respectively connected to the mounting plate 2 and the axis plate 10;

[0032] The inner wall of the end of the mounting plate 2 is connected to the limiting plate 3, and the limiting plate 3 is provided with a limiting groove 4 and a positioning groove 14 inside.

[0033] The inner wall of the end of the sealing plate 5 is connected to the rotating plate 6, and the side of the rotating plate 6 adjacent to the mounting plate 2 is connected to the positioning plate 7, and the positioning plate 7 and the limiting groove 4 are adapted to each other. The rotating plate 6 is used to rotate in the sealing plate 5 so that the positioning plate 7 passes through the limiting groove 4 and enters the positioning groove 14;

[0034] The sealing plate 5 is also provided with a positioning member for stabilizing the rotating plate 6 , and the positioning member is used to stabilize the rotating plate 6 when the positioning plate 7 and the limiting groove 4 are misaligned.

[0035] The centrifugal pump sealing device of the utility model rotates the rotating plate 6 to rotate the positioning plate 7 to a position matching the limiting groove 4, presses the sealing plate 5 to make the positioning plate 7 enter the limiting groove 4 and then enter the positioning groove 14, and then rotates the rotating plate 6 to form a misalignment between the positioning plate 7 and the limiting groove 4, and controls the stability of the rotating plate 6 through the positioning member, and then connects the sealing plate 5 to the mounting plate 2. The centrifugal pump sealing device of the utility model can be pre-positioned before installing the sealing plate 5, so that it is convenient for users to perform positioning and installation.

[0036] In some embodiments, there are two limit plates 3 and two rotating plates 6. The positioning member is a positioning bolt 8, which penetrates the sealing plate 5 and extends to the outer wall of the rotating plate 6.

[0037] It can be understood that there are two limit plates 3, which are respectively located on the inner wall of the first end of the mounting plate 2 and the inner wall of the second end of the mounting plate 2; there are also two rotating plates 6, which are respectively located on the inner wall of the first end of the sealing plate 5 and the inner wall of the second end of the sealing plate 5. During installation, the two positioning plates 7 are respectively passed through the corresponding limit slots 4 and enter the corresponding positioning slots 14, and the two rotating plates 6 are respectively rotated so that the two positioning plates 7 are respectively misaligned with the corresponding limit slots 4, and then the positioning bolts 8 are respectively tightened to control the stability of the two rotating plates 6. Preferably, the misalignment angle between the positioning plate 7 and the limit slot 4 is 90 degrees, that is, the angle between the horizontal direction of the positioning plate 7 and the vertical direction of the limit slot 4 is 90 degrees, and then the sealing plate 5 is connected to the mounting plate 2 to form a good seal.

[0038] In some embodiments, the mounting plate 2 is made of aluminum alloy, and the sealing plate 5 is made of aluminum alloy.

[0039] In some embodiments, the mounting plate 2 is embedded with a first sealing ring 12, and the sealing plate 5 is embedded with a second sealing ring 13. The first sealing ring 12 is made of silicone material, and the second sealing ring 13 is made of silicone material. There are three second sealing rings 13, and the diameters of the three second sealing rings 13 are increased exponentially.

[0040] Specifically, a first sealing ring 12 is embedded in the mounting plate 2, and the internal threads of the sealing plate 5 are connected with multiple mounting bolts 9. After the sealing plate 5 and the mounting plate 2 are pre-positioned, the sealing plate 5 and the mounting plate 2 are connected by multiple mounting bolts 9, which effectively squeeze the first sealing ring 12 for sealing.

[0041] Furthermore, a second sealing ring 13 is embedded inside the sealing plate 5, and the number of the second sealing rings 13 is three, and the diameter of the second sealing ring 13 increases by two times. The shaft plate 10 is installed on the outside of the sealing plate 5, and the internal thread of the shaft plate 10 is connected with multiple locking bolts 11. When installing the shaft plate 10, the shaft plate 10 is first fitted to the sealing plate 5, and then the locking bolts 11 are inserted to control the expansion of the second sealing ring 13 for sealing. The use of such a multi-sealing structure can ensure the sealing stability of the shaft plate 10 during installation.

[0042] Preferably, Figure 2 As shown, the sealing plate 5 is connected to the mounting plate 2 via a plurality of mounting bolts 9, and the mounting bolts 9 are equidistantly distributed in a circular manner about the axis of the sealing plate 5. The shaft plate 10 is connected to the sealing plate 5 via a plurality of locking bolts 11, and the locking bolts 11 are equidistantly distributed in a circular manner about the axis of the shaft plate 10.

[0043] A second aspect of the embodiments of the utility model provides a centrifugal pump, wherein the centrifugal pump comprises the centrifugal pump sealing device mentioned above.

[0044] like Figure 1-Figure 4 As shown, the working principle of a centrifugal pump sealing device provided in this embodiment is as follows:

[0045] Step 1: When the user needs to install the pump body 1 , the user needs to rotate the rotating plate 6 so that the positioning plate 7 rotates to a position that matches the limiting groove 4 .

[0046] Step 2: The user needs to embed the first sealing ring 12 into the mounting plate 1, and embed the second sealing ring 13 into the sealing plate 5, press the sealing plate 5 so that the positioning plate 7 enters the limiting groove 4 and then enters the positioning groove 14, and then the user rotates the rotating plate 6 to form a misalignment between the positioning plate 7 and the limiting groove 4, and the user rotates the positioning bolt 8 to control the rotating plate 6 for stability. This design can be pre-positioned before installing the sealing plate 5, so that the user can easily perform positioning and installation.

[0047] Step 3: The user inserts the mounting bolts 9 into the sealing plate 5 to stabilize the sealing plate 5 and the mounting plate 2, so that the first sealing ring 12 can be squeezed for sealing.

[0048] Step 4: Install the shaft plate 10, fit the shaft plate 10 onto the sealing plate 5, and then insert the locking bolt 11 to control the expansion of the second sealing ring 13 for sealing. The multi-sealing structure with three second sealing rings 13 can ensure the sealing stability of the shaft plate 10 during installation.

[0049] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0050] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

[0051] In view of the above detailed description, these and other changes can be made to these embodiments, and this written description includes the best mode embodiments to disclose the utility model. The scope of the patent obtained by the utility model is defined by the claims, and the claims are not limited by the content of the present disclosure. The protection scope of the utility model is not limited thereto. Any technician familiar with the technical field within the scope disclosed by the utility model, according to the technical solution and its concept of the utility model, makes equivalent replacement or change, which is within the protection scope of the utility model.

Claims

1. A centrifugal pump sealing device, characterized in that: include: A mounting plate (2), a sealing plate (5) and an axis plate (10) are sequentially arranged on the outside of the pump body (1), the pump body (1) is connected to the mounting plate (2), and the sealing plate (5) is respectively connected to the mounting plate (2) and the axis plate (10); The inner wall of the end of the mounting plate (2) is connected to a limiting plate (3), and a limiting groove (4) and a positioning groove (14) are respectively provided inside the limiting plate (3); The inner wall of the end of the sealing plate (5) is connected to a rotating plate (6), and the side of the rotating plate (6) adjacent to the mounting plate (2) is connected to a positioning plate (7), and the positioning plate (7) and the limiting groove (4) are mutually adapted, and the rotating plate (6) is used to rotate inside the sealing plate (5) so that the positioning plate (7) passes through the limiting groove (4) and enters the positioning groove (14); The sealing plate (5) is also provided with a positioning member for stabilizing the rotating plate (6), and the positioning member is used to stabilize the rotating plate (6) when the positioning plate (7) and the limiting groove (4) are misaligned.

2. The centrifugal pump sealing device according to claim 1, characterized in that: The number of the limiting plates (3) is two, and the number of the rotating plates (6) is two.

3. The centrifugal pump sealing device according to claim 1, characterized in that: The mounting plate (2) is made of an aluminum alloy, and the sealing plate (5) is made of an aluminum alloy.

4. The centrifugal pump sealing device according to claim 1, characterized in that: The mounting plate (2) has a first sealing ring (12) embedded therein, and the sealing plate (5) has a second sealing ring (13) embedded therein.

5. The centrifugal pump sealing device according to claim 4, characterized in that: The first sealing ring (12) is made of silicone material, and the second sealing ring (13) is made of silicone material.

6. The centrifugal pump sealing device according to claim 5, characterized in that: The number of the second sealing rings (13) is three, and the diameters of the three second sealing rings (13) increase exponentially.

7. The centrifugal pump sealing device according to claim 1, characterized in that: The sealing plate (5) is connected to the mounting plate (2) via a plurality of mounting bolts (9), and the mounting bolts (9) are equidistantly distributed in a ring shape about the axis of the sealing plate (5).

8. The centrifugal pump sealing device according to claim 1, characterized in that: The shaft plate (10) is connected to the sealing plate (5) via a plurality of locking bolts (11), and the locking bolts (11) are equidistantly distributed in a ring around the axis of the shaft plate (10).

9. The centrifugal pump sealing device according to claim 1, characterized in that: The positioning member is a positioning bolt (8), and the positioning bolt (8) passes through the sealing plate (5) and extends to the outer wall of the rotating plate (6).

10. A centrifugal pump, characterized in that: A centrifugal pump sealing device comprising any one of claims 1 to 9.

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