Magnetic sealing device of centrifugal pump

Abstract

The utility model discloses a centrifugal pump magnetic sealing device which comprises a centrifugal pump shell, a rotating shaft body is installed in the centrifugal pump shell, and a sleeve is detachably connected to the outer side of the rotating shaft body. The sealing device has the beneficial effects that the bidirectional lead screw, the first moving blocks, the second moving blocks, an adjusting rod, a sliding rod, a first bevel gear, a second bevel gear, a connecting rod, a rotating disc, an arc-shaped plate and a sealing layer are arranged, so that the function of sealing the rotating shaft is achieved, and the bidirectional lead screw rotates to drive the first moving blocks at the two ends to move; a first moving block drives a second moving block to move along the outer side of a sliding rod through an adjusting rod, the second moving block drives an arc-shaped plate to move while moving, and the arc-shaped plate drives a sealing layer to move till the sealing layer makes contact with the outer side of a rotating shaft body; and by arranging a fixing block, a groove, a bolt and a second connecting hole, the function of limiting the positions of the arc-shaped plate and the sealing layer is achieved, and the influence caused by rotation of the rotating disc during use is prevented.

Description

Technical Field

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

[0002] A centrifugal pump is a pump that transports liquid by the centrifugal force generated by the rotation of an impeller. It is mainly composed of an impeller, a pump body, a pump shaft, bearings, a sealing ring and a stuffing box. Its main features include: compact structure, wide flow and head range, uniform flow, stable operation, low vibration, and low maintenance and repair costs. Centrifugal pumps often have leakage problems, which cause the centrifugal liquid to enter the interior of the pump body and cause corrosion to the pump body. In view of the above problems, the utility model provides a centrifugal pump magnetic sealing device to solve them. Utility Model Content

[0003] The utility model aims to provide a centrifugal pump magnetic sealing device to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a centrifugal pump magnetic sealing device, comprising a centrifugal pump housing, a rotating shaft body is installed inside the centrifugal pump housing, a sleeve is detachably connected to the outside of the rotating shaft body, a magnet is fixedly connected to one side of the sleeve, first connecting holes are opened at both ends of the sleeve, a bidirectional screw rod is rotatably connected inside the sleeve, a first moving block is threadedly connected to the two ends of the outer side of the bidirectional screw rod, an adjusting rod is rotatably connected to the top of the first moving block, an end of the adjusting rod away from the first moving block is rotatably connected to the second moving block, a sliding rod is slidably connected to the inside of the second moving block, both ends of the sliding rod are fixedly connected to an arc plate through a support plate, and a sealing layer is fixedly connected to the side of the arc plate away from the sliding rod.

[0005] Preferably, one end of the bidirectional screw is fixedly connected to a second bevel gear.

[0006] Preferably, one side of the second bevel gear is meshingly connected with the first bevel gear.

[0007] Preferably, a connecting rod is fixedly connected to the center of one side of the first bevel gear.

[0008] Preferably, one end of the connecting rod away from the first bevel gear passes through one side of the sleeve and is fixedly connected to a rotating disk.

[0009] Preferably, fixing blocks are fixedly connected to both sides of the sleeve, and a groove is formed on one side of the fixing block.

[0010] Preferably, second connection holes are provided on both sides of the turntable, and one side of the fixing block is detachably connected with bolts.

[0011] Compared with the prior art, the beneficial effects of the utility model are as follows: by arranging the sleeve and the magnet, the function of positioning the position of the rotating shaft body is realized, the rotating shaft body is passed through the first connecting hole into the interior of the sleeve, the magnet is adsorbed on one end of the rotating shaft body, and the position of the sleeve is positioned; by arranging the bidirectional screw rod, the first moving block, the second moving block, the adjusting rod, the sliding rod, the first bevel gear, the second bevel gear, the connecting rod, the rotating disk, the arc plate and the sealing layer, the function of sealing the rotating shaft is realized, the rotating disk is rotated, the rotating disk drives the connecting rod to rotate, the connecting rod drives the first bevel gear to rotate, the first bevel gear drives the bidirectional screw rod to rotate through the second bevel gear, and the bidirectional screw rod rotates The moving belt moves with the first moving blocks at both ends, the first moving block moves with the adjusting rod, the adjusting rod moves with the second moving block along the outside of the sliding rod, the second moving block moves with the arc plate while moving, the arc plate moves with the sealing layer until the sealing layer contacts the outside of the rotating shaft body, the two ends of the two groups of arc plates contact to form a ring, which contains the rotating shaft body; by setting a fixed block, a groove, a bolt and a second connecting hole, the function of limiting the position of the arc plate and the sealing layer is realized, one side of the turntable is located in the groove, and the bolt is turned, and the bolt passes through the second connecting hole to fix the turntable in the fixed block to prevent the turntable from being affected during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the structure of the utility model;

[0013] Figure 2 It is the front view of the utility model;

[0014] Figure 3 It is a schematic diagram of the enlarged structure of the local A of the utility model;

[0015] Figure 4 It is a schematic diagram of the enlarged structure of part B of the utility model.

[0016] In the figure: 1. sleeve; 2. shaft body; 3. first connecting hole; 4. magnet; 5. arc plate; 6. sealing layer; 7. sliding rod; 8. bidirectional screw rod; 9. first moving block; 10. second moving block; 11. adjusting rod; 12. fixing block; 13. groove; 14. turntable; 15. second connecting hole; 16. bolt; 17. first bevel gear; 18. second bevel gear; 19. centrifugal pump housing; 20. connecting rod. DETAILED DESCRIPTION

[0017] 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 in 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.

[0018] See also Figures 1 to 4 The utility model provides a technical solution: a centrifugal pump magnetic sealing device, including a centrifugal pump housing 19, a rotating shaft body 2 is installed inside the centrifugal pump housing 19, and a sleeve 1 is detachably connected to the outer side of the rotating shaft body 2 to protect the rotating shaft body 2. A magnet 4 is fixedly connected to one side of the sleeve 1 to better locate the position of the sleeve 1. First connecting holes 3 are opened at both ends of the sleeve 1 to better allow the rotating shaft body 2 to enter the sleeve 1. A bidirectional screw rod 8 is rotatably connected inside the sleeve 1, and first moving blocks 9 are threadedly connected to the outer ends of the bidirectional screw rod 8. The bidirectional screw rod 8 rotates to move the first moving blocks 9 at both ends, and the top of the first moving block 9 is rotatably connected to an adjusting screw rod 8. Rod 11, the first moving block 9 moves with the adjusting rod 11, the end of the first adjusting rod 11 away from the first moving block 9 is rotatably connected to the second moving block 10, the first adjusting rod 11 moves with the second moving block 10 to move, the second moving block 10 is internally slidably connected to the sliding rod 7, the second moving block 10 moves along the sliding rod 7, the two ends of the sliding rod 7 are fixedly connected to the arc plate 5 through the supporting plate, the second moving block 10 moves with the arc plate 5 to move, the arc plate 5 is semi-circular, the two ends of the two groups of arc plates 5 contact to form a complete circular ring, the side of the arc plate 5 away from the sliding rod 7 is fixedly connected to the sealing layer 6, and the arc plate 5 moves with the sealing layer 6.

[0019] Furthermore, one end of the bidirectional screw rod 8 is fixedly connected to a second bevel gear 18 , and the second bevel gear 18 rotates to drive the bidirectional screw rod 8 to rotate.

[0020] Furthermore, one side of the second bevel gear 18 is meshedly connected with the first bevel gear 17 , and the rotation of the first bevel gear 17 drives the second bevel gear 18 to rotate as well.

[0021] Furthermore, a connecting rod 20 is fixedly connected to the center of one side of the first bevel gear 17, and the connecting rod 20 rotates to drive the first bevel gear 17 to rotate.

[0022] Furthermore, one end of the connecting rod 20 away from the first bevel gear 17 passes through one side of the sleeve 1 and is fixedly connected to the rotating disk 14 . When the rotating disk 14 is rotated, the rotating disk 14 rotates with the connecting rod 20 .

[0023] Furthermore, fixing blocks 12 are fixedly connected to both sides of the sleeve 1 , a groove 13 is formed on one side of the fixing block 12 , and one side of the rotating disk 14 is located in the groove 13 .

[0024] Furthermore, second connection holes 15 are opened on both sides of the turntable 14, and a bolt 16 is detachably connected to one side of the fixing block 12. The bolt 16 passes through the second connection hole 15 to connect the turntable 14 to the fixing block 12 to prevent the turntable 14 from rotating.

[0025] Specifically, when using the utility model, the shaft body 2 is passed through the first connecting hole 3 into the interior of the sleeve 1, the magnet 4 is adsorbed on one end of the shaft body 2, the position of the sleeve 1 is positioned, and the turntable 14 is rotated, the turntable 14 rotates with the connecting rod 20, the connecting rod 20 rotates with the first bevel gear 17, the first bevel gear 17 rotates with the bidirectional screw rod 8 through the second bevel gear 18, the bidirectional screw rod 8 rotates with the first moving blocks 9 at both ends to move, the first moving block 9 moves with the adjusting rod 11, the adjusting rod 11 moves with the second moving block 10 along the outside of the slide rod 7, the second moving block 10 moves with the arc plate 5 while moving, the arc plate 5 moves with the sealing layer 6 until the sealing layer 6 contacts the outside of the shaft body 2, and the two ends of the two groups of arc plates 5 contact to form a ring, which contains the shaft body 2.

[0026] In the description of the present invention, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inside", "front", "center", "both ends" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0027] In addition, the terms "first", "second", "third" and "fourth" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first", "second", "third" and "fourth" may explicitly or implicitly include at least one of such features.

[0028] In the present utility model, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the utility model according to the specific circumstances.

[0029] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A centrifugal pump magnetic seal device, comprising a centrifugal pump housing (19), characterized in that: A rotating shaft body (2) is installed inside the centrifugal pump housing (19), and a sleeve (1) is detachably connected to the outer side of the rotating shaft body (2), and a magnet (4) is fixedly connected to one side of the sleeve (1). First connecting holes (3) are provided at both ends of the sleeve (1), and a bidirectional screw rod (8) is rotatably connected inside the sleeve (1), and a first moving block (9) is threadedly connected to the outer ends of the bidirectional screw rod (8). The top of the first moving block (9) is rotatably connected to an adjusting rod (11), and the end of the adjusting rod (11) away from the first moving block (9) is rotatably connected to a second moving block (10), and the interior of the second moving block (10) is slidably connected to a sliding rod (7), and the two ends of the sliding rod (7) are fixedly connected to an arc plate (5) through a support plate, and the side of the arc plate (5) away from the sliding rod (7) is fixedly connected to a sealing layer (6).

2. A centrifugal pump magnetic seal device according to claim 1, characterized in that: One end of the bidirectional screw rod (8) is fixedly connected to a second bevel gear (18).

3. A centrifugal pump magnetic seal device according to claim 2, characterized in that: One side of the second bevel gear (18) is meshedly connected with the first bevel gear (17).

4. A centrifugal pump magnetic seal device according to claim 3, characterized in that: A connecting rod (20) is fixedly connected to the center of one side of the first bevel gear (17).

5. A centrifugal pump magnetic seal device according to claim 4, characterized in that: One end of the connecting rod (20) away from the first bevel gear (17) passes through one side of the sleeve (1) and is fixedly connected to a rotating disk (14).

6. A centrifugal pump magnetic seal device according to claim 5, characterized in that: Fixed blocks (12) are fixedly connected to both sides of the sleeve (1), and a groove (13) is provided on one side of the fixed block (12).

7. A centrifugal pump magnetic seal device according to claim 6, characterized in that: Second connection holes (15) are provided on both sides of the rotating disk (14), and a bolt (16) is detachably connected to one side of the fixing block (12).

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