Sealing device for top end of main shaft of hanging bag type centrifugal machine and hanging bag type centrifugal machine

Abstract

The utility model discloses a sealing device for the top end of a main shaft of a hanging bag type centrifugal machine and the hanging bag type centrifugal machine, which belong to the field of centrifugal machines and comprise a conical main shaft of the centrifugal machine, a conical shaft sleeve of the main shaft of the centrifugal machine and a metal spherical protective cover, the upper surface of the centrifugal machine conical main shaft is higher than the upper surface of the centrifugal machine conical shaft sleeve, a space is defined by the metal spherical protective cover, the upper surface of the centrifugal machine conical main shaft and the upper surface of the centrifugal machine conical shaft sleeve are located in the space, and a first flexible sealing ring is arranged on the upper surface of the centrifugal machine conical shaft sleeve. The hanging bag type centrifugal machine spindle top end sealing device further comprises a sealing type locking mechanism, the lower portion of the sealing type locking mechanism is connected with the centrifugal machine conical spindle, the upper portion of the sealing type locking mechanism penetrates out of the metal spherical protective cover, and the outer edge of the rigid sealing ring is connected with the inner wall of the metal spherical protective cover. The lower portion of the sealing type locking mechanism is located in the first flexible sealing ring. The hanging bag type centrifugal machine solves the problem of liquid leakage.

Description

Technical Field

[0001] The utility model relates to a centrifuge, in particular to a main shaft top end sealing device of a hanging bag type centrifuge and the hanging bag type centrifuge. Background Art

[0002] The flat plate centrifuge adopts a platform structure, the shell and the platform are welded as one, the shell cover and the shell adopt a flange-matched quick-opening structure, the shell cover is opened with the help of a mechanical balancer, and the shell cover is equipped with a feeding pipe, a cleaning pipe, a sight glass, an observation light, a vent hole, etc. The flat plate centrifuge has a simple structure, convenient operation, low cost, high efficiency, stable startup, good environmental performance, and good separation effect. There are various models, including ordinary flat plate, hanging bag, horizontal and vertical, etc., which are suitable for processing needs of different scales and materials.

[0003] Usually, the working medium of the centrifuge is solid-liquid separation. However, due to structural reasons, the main shaft of the hanging bag centrifuge is higher than the tapered sleeve of the centrifuge main shaft. In order to prevent liquid leakage from entering the shaft and sleeve during operation, a clamping bolt is used on the top of the shaft to tighten a spherical shield. The round mouth at the bottom of the spherical shield and the metal of the upper flat surface of the tapered sleeve form a "line seal". The seal is effective in a short time. After using it for a period of time, the spherical shield is slightly deformed, and the line seal is prone to failure and leakage. At the same time, the clamping bolt on the top of the main shaft is also prone to leakage because there is no sealing gasket between it and the shaft. Utility Model Content

[0004] In view of the above defects, the utility model provides a sealing device for the top end of the main shaft of a hanging bag type centrifuge, which solves the problem of liquid leakage of the hanging bag type centrifuge.

[0005] A centrifuge spindle top sealing device comprises a centrifuge conical spindle, a centrifuge spindle conical sleeve and a metal spherical protective cover, wherein the centrifuge conical spindle is located in the centrifuge spindle conical sleeve, the upper surface of the centrifuge conical spindle is higher than the upper surface of the centrifuge spindle conical sleeve, the metal spherical protective cover encloses a space, the upper surface of the centrifuge conical spindle and the upper surface of the centrifuge spindle conical sleeve are located in the space, a first flexible sealing ring is arranged on the upper surface of the centrifuge spindle conical sleeve, a rigid sealing ring is arranged on the upper surface of the first flexible sealing ring, the centrifuge spindle top sealing device also comprises a sealing locking mechanism, the lower part of the sealing locking mechanism is connected to the centrifuge conical spindle, the upper part passes through the metal spherical protective cover, the outer edge of the rigid sealing ring is connected to the inner wall of the metal spherical protective cover, and the lower part of the sealing locking mechanism is located in the circle of the first flexible sealing ring.

[0006] In one or more optional embodiments of the utility model, the sealed locking mechanism includes a centrifuge spindle locking nut and a locking unit, the centrifuge spindle locking nut is connected to the conical spindle of the centrifuge, the locking unit includes a locking bolt, a second flexible sealing ring, a metal flat washer and a spring washer, the second flexible sealing ring, the metal flat washer and the spring washer are sequentially sleeved on the locking bolt from bottom to top, the locking bolt passes through a hole opened at the top of the metal spherical protective cover and is connected to the centrifuge spindle locking nut, and the second flexible sealing ring, the metal flat washer and the spring washer are located outside the metal spherical protective cover.

[0007] In one or more optional embodiments of the utility model, the sealed locking mechanism also includes a metal sealing sleeve, the metal sealing sleeve includes a metal sealing upper sleeve and a metal sealing lower sleeve, the outer edge of the metal sealing upper sleeve is connected to the inner wall of the hole opened at the top of the metal spherical protective cover, and the locking unit also includes a first O-ring and a second O-ring, the first O-ring and the second O-ring are sleeved on the locking bolt, the first O-ring is located below the second O-ring, and the outer edges of the first O-ring and the second O-ring are tightly fitted with the inner edge of the metal sealing lower sleeve.

[0008] In one or more optional embodiments of the present invention, the outer diameter of the metal sealing upper sleeve is greater than the outer diameter of the metal sealing lower sleeve.

[0009] In one or more optional embodiments of the present invention, the locking bolt has a locking screw, and the locking unit also includes a centrifuge spindle locking external screw column, the external thread of the centrifuge spindle locking external screw column is threadedly connected to the internal thread of the centrifuge spindle locking nut, and the internal thread of the centrifuge spindle locking external screw column is threadedly connected to the external thread of the locking screw 721.

[0010] In one or more optional embodiments of the utility model, the top sealing device of the main shaft of the hanging bag centrifuge also includes a rigid reinforcement ring, the first flexible sealing ring, the rigid sealing ring, the rigid reinforcement ring and the center line of the conical main shaft of the centrifuge coincide, the inner diameter of the rigid sealing ring> the inner diameter of the rigid reinforcement ring> the inner diameter of the first flexible sealing ring, the lower surface of the rigid reinforcement ring is connected to the upper surface of the first flexible sealing ring, the lower part of the outer edge of the rigid reinforcement ring is connected to the inner wall of the rigid sealing ring, and the upper surface of the rigid reinforcement ring is connected to the inner wall of the metal spherical protective cover.

[0011] The utility model also provides a hanging bag type centrifuge.

[0012] A hanging bag centrifuge comprises the above-mentioned hanging bag centrifuge main shaft top sealing device.

[0013] Beneficial effects of the invention:

[0014] The utility model changes the "line seal" of the spherical shield at the top of the shaft into a "face seal" structure, designs it as a flange seal, and tightens the bolts of the sealing locking mechanism so that the rigid sealing surface presses the annular first flexible sealing ring, thereby realizing the sealing of the spherical shield and the tapered shaft sleeve, and the bolts of the sealing locking mechanism and the top of the main shaft are connected through the metal sealing sleeve and the second flexible sealing ring, thereby realizing the sealing of the top of the main shaft and the pressing mechanism, and finally solving the problem of liquid leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 It is a partial structural schematic diagram of the utility model;

[0017] Figure 3 This is a schematic diagram of an exploded view of the locking unit of the utility model;

[0018] Figure 4 This is a schematic diagram of the structure of the metal sealing sleeve of the utility model;

[0019] Figure 5 This is a schematic diagram of the structure of the first flexible sealing ring of the utility model;

[0020] In the figure: 1. centrifuge conical main shaft, 2. centrifuge main shaft conical sleeve, 3. metal spherical protective cover, 4. space, 5. first flexible sealing ring, 6. rigid sealing ring, 7. sealed locking mechanism, 71. centrifuge main shaft locking nut, 72. locking unit, 721. locking bolt, 7211. locking screw, 722. first O-ring, 723. second O-ring, 724. second flexible sealing ring, 725. metal flat washer, 726. spring washer, 727. centrifuge main shaft locking outer screw column, 728. centrifuge main shaft key, 73. metal sealing sleeve, 731. metal sealing upper sleeve, 732. metal sealing lower sleeve, 8. rigid reinforcement ring. DETAILED DESCRIPTION

[0021] The utility model will be further described below.

[0022] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "longitudinal", "lateral", "horizontal", "inside", "outside", "front", "back", "top", "bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the utility model product is usually placed when in use, and are only for the convenience of describing the present utility model 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 cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third" and the like are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0023] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "open", "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the overall structure of the utility model. Figure 2 This is a partial structural diagram of the utility model. Figure 3 This is a schematic diagram of an exploded view of the locking unit of the utility model. Figure 4 This is a schematic diagram of the structure of the metal sealing sleeve of the utility model. Figure 5 This is a schematic diagram of the structure of the first flexible sealing ring of the utility model.

[0025] A centrifuge spindle top sealing device comprises a centrifuge conical spindle 1, a centrifuge spindle conical sleeve 2 and a metal spherical protective cover 3, wherein the centrifuge conical spindle 1 is located in the centrifuge spindle conical sleeve 2, the upper surface of the centrifuge conical spindle 1 is higher than the upper surface of the centrifuge spindle conical sleeve 2, the metal spherical protective cover 3 encloses a space 4, the upper surface of the centrifuge conical spindle 1 and the upper surface of the centrifuge spindle conical sleeve 2 are located in the space 4, a first flexible sealing ring 5 is arranged on the upper surface of the centrifuge spindle conical sleeve 2, a rigid sealing ring 6 is arranged on the upper surface of the first flexible sealing ring 5, and the centrifuge spindle top sealing device further comprises a sealing locking mechanism 7, the lower part of the sealing locking mechanism 7 is connected to the centrifuge conical spindle 1, the upper part passes through the metal spherical protective cover 3, the outer edge of the rigid sealing ring 6 is connected to the inner wall of the metal spherical protective cover 3, and the lower part of the sealing locking mechanism 7 is located in the circle of the first flexible sealing ring 5.

[0026] Through the first flexible sealing ring 5, the rigid sealing ring 6 and the sealing locking mechanism 7, inside the metal spherical protective cover 3, after the sealing locking mechanism 7 is locked, the rigid sealing surface of the rigid sealing ring 6 presses the flexible sealing ring, thereby achieving the sealing of the metal spherical protective cover 3 and the conical shaft sleeve 2 of the centrifuge main shaft, and solving the problem of liquid leakage.

[0027] In one or more specific embodiments of the utility model, the sealed locking mechanism 7 includes a centrifuge main shaft locking nut 71 and a locking unit 72. The centrifuge main shaft locking nut 71 is connected to the centrifuge conical main shaft 1. The locking unit 72 includes a locking bolt 721, a second flexible sealing ring 724, a metal flat washer 725 and a spring washer 726. The second flexible sealing ring 724, the metal flat washer 725 and the spring washer 726 are sequentially sleeved on the locking bolt 721 from bottom to top. The locking bolt 721 passes through the hole opened at the top of the metal spherical protective cover 3 and is connected to the centrifuge main shaft locking nut 71. The second flexible sealing ring 724, the metal flat washer 725 and the spring washer 726 are located outside the metal spherical protective cover 3.

[0028] Through the cooperation of the centrifuge main shaft locking nut 71 and the locking unit 72, the centrifuge main shaft locking nut 71 and the centrifuge conical main shaft 1, as well as the second flexible sealing ring 724, the metal flat washer 725 and the spring washer 726, not only the metal spherical protective cover 3 and the centrifuge main shaft conical sleeve 2 are realized, but also the sealing of the top of the centrifuge conical main shaft 1 and the sealing locking mechanism 7 is realized, thereby solving the problem of liquid leakage.

[0029] In one or more specific embodiments of the utility model, the sealing locking mechanism 7 further includes a metal sealing sleeve 73, the metal sealing sleeve 73 includes a metal sealing upper sleeve 731 and a metal sealing lower sleeve 732, the outer edge of the metal sealing upper sleeve 731 is connected to the inner wall of the hole opened at the top of the metal spherical protective cover 3, and the locking unit 72 further includes a first O-ring 722 and a second O-ring 723, the first O-ring 722 and the second O-ring 723 are sleeved on the locking bolt 721, the first O-ring 722 is located below the second O-ring 723, and the outer edges of the first O-ring 722 and the second O-ring 723 are tightly fitted with the inner edge of the metal sealing lower sleeve 732. The provision of the metal sealing sleeve 73 and the first O-ring 722 and the second O-ring 723, on the one hand, improves the sealing performance and further solves the problem of liquid leakage, and on the other hand, the metal sealing sleeve 73 also has a guiding function to prevent the locking bolt 721 from deflecting.

[0030] In one or more specific embodiments of the present invention, the outer diameter of the metal sealing upper sleeve 731 is greater than the outer diameter of the metal sealing lower sleeve 732 , so that the metal sealing upper sleeve 731 can be connected to the metal spherical protective cover 3 more conveniently.

[0031] In one or more specific embodiments of the present invention, in order to achieve a better sealing connection effect, the locking bolt 721 has a locking screw 7211, and the locking unit 72 also includes a centrifuge main shaft locking outer screw column 727. The outer thread of the centrifuge main shaft locking outer screw column 727 is threadedly connected to the inner thread of the centrifuge main shaft locking nut 71, and the inner thread of the centrifuge main shaft locking outer screw column 727 is threadedly connected to the outer thread of the locking screw 7211.

[0032] In one or more specific embodiments of the present invention, the centrifuge spindle locking nut 71 and the centrifuge conical spindle 1 can be fixedly connected by welding, or can be detachably connected by a centrifuge spindle key 728 .

[0033] In one or more specific embodiments of the present invention, in order to better prevent liquid leakage, the top sealing device of the main shaft of the hanging bag centrifuge also includes a rigid reinforcement ring 8, the first flexible sealing ring 5, the rigid sealing ring 6, the rigid reinforcement ring 8 and the center line of the conical main shaft 1 of the centrifuge coincide, the inner diameter of the rigid sealing ring 6> the inner diameter of the rigid reinforcement ring 8> the inner diameter of the first flexible sealing ring 5, the lower surface of the rigid reinforcement ring 8 is connected to the upper surface of the first flexible sealing ring 5, the lower part of the outer edge of the rigid reinforcement ring 8 is connected to the inner wall of the rigid sealing ring 6, and the upper surface of the rigid reinforcement ring 8 is connected to the inner wall of the metal spherical protective cover 3.

[0034] In one or more specific embodiments of the present invention, the first flexible sealing ring 5 and the second flexible sealing ring 724 can be rubber sealing rings or polytetrafluoroethylene sealing rings, and the rigid sealing ring 6 and the rigid reinforcement ring 8 can be stainless steel rings or other metal rings. No special limitation is made here, and technical personnel in this field can make a selection as needed.

[0035] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A centrifuge spindle top sealing device, comprising a centrifuge conical spindle (1), a centrifuge spindle conical sleeve (2) and a metal spherical protective cover (3), wherein the centrifuge conical spindle (1) is located in the centrifuge spindle conical sleeve (2), the upper surface of the centrifuge conical spindle (1) is higher than the upper surface of the centrifuge spindle conical sleeve (2), the metal spherical protective cover (3) encloses a space (4), the upper surface of the centrifuge conical spindle (1) and the upper surface of the centrifuge spindle conical sleeve (2) are located in the space (4), characterized in that: A first flexible sealing ring (5) is arranged on the upper surface of the centrifuge main shaft tapered sleeve (2), and a rigid sealing ring (6) is arranged on the upper surface of the first flexible sealing ring (5). The hanging bag centrifuge main shaft top sealing device also includes a sealing locking mechanism (7), the lower part of the sealing locking mechanism (7) is connected to the centrifuge conical main shaft (1), and the upper part passes through the metal spherical protective cover (3), the outer edge of the rigid sealing ring (6) is connected to the inner wall of the metal spherical protective cover (3), and the lower part of the sealing locking mechanism (7) is located inside the circle of the first flexible sealing ring (5).

2. The main shaft top sealing device of the hanging bag centrifuge according to claim 1, characterized in that: The sealed locking mechanism (7) comprises a centrifuge main shaft locking nut (71) and a locking unit (72); the centrifuge main shaft locking nut (71) is connected to the centrifuge conical main shaft (1); the locking unit (72) comprises a locking bolt (721), a second flexible sealing ring (724), a metal flat washer (725) and a spring washer (726); the second flexible sealing ring (724), the metal flat washer (725) and the spring washer (726) are sequentially sleeved on the locking bolt (721) from bottom to top; the locking bolt (721) passes through a hole opened at the top of the metal spherical protective cover (3) and is connected to the centrifuge main shaft locking nut (71); the second flexible sealing ring (724), the metal flat washer (725) and the spring washer (726) are located outside the metal spherical protective cover (3).

3. The main shaft top sealing device of the hanging bag centrifuge according to claim 2, characterized in that: The sealed locking mechanism (7) further comprises a metal sealing sleeve (73), the metal sealing sleeve (73) comprising a metal sealing upper sleeve (731) and a metal sealing lower sleeve (732), the outer edge of the metal sealing upper sleeve (731) being connected to the inner wall of the hole opened at the top of the metal spherical protective cover (3), and the locking unit (72) further comprises a first O-type sealing ring (722) and a second O-type sealing ring (723), the first O-type sealing ring (722) and the second O-type sealing ring (723) being sleeved on the locking bolt (721), the first O-type sealing ring (722) being located below the second O-type sealing ring (723), and the outer edges of the first O-type sealing ring (722) and the second O-type sealing ring (723) being tightly fitted to the inner edge of the metal sealing lower sleeve (732).

4. The main shaft top sealing device of the hanging bag centrifuge according to claim 3, characterized in that: The outer diameter of the metal sealing upper sleeve (731) is greater than the outer diameter of the metal sealing lower sleeve (732).

5. The main shaft top sealing device of the hanging bag centrifuge according to claim 3, characterized in that: The locking bolt (721) has a locking screw (7211), and the locking unit (72) further comprises a centrifuge main shaft locking outer screw column (727), the outer thread of the centrifuge main shaft locking outer screw column (727) being threadedly connected to the inner thread of the centrifuge main shaft locking nut (71), and the inner thread of the centrifuge main shaft locking outer screw column (727) being threadedly connected to the outer thread of the locking screw (7211).

6. The main shaft top sealing device of a hanging bag centrifuge according to any one of claims 1 to 5, characterized in that: The hanging bag centrifuge main shaft top sealing device further comprises a rigid reinforcement ring (8); the first flexible sealing ring (5), the rigid sealing ring (6), the rigid reinforcement ring (8) and the center line of the conical main shaft (1) of the centrifuge coincide with each other; the inner diameter of the rigid sealing ring (6) is greater than the inner diameter of the rigid reinforcement ring (8) and is greater than the inner diameter of the first flexible sealing ring (5); the lower surface of the rigid reinforcement ring (8) is connected to the upper surface of the first flexible sealing ring (5); the lower part of the outer edge of the rigid reinforcement ring (8) is connected to the inner wall of the rigid sealing ring (6); and the upper surface of the rigid reinforcement ring (8) is connected to the inner wall of the metal spherical protective cover (3).

7. A hanging bag centrifuge, characterized in that: The hanging bag centrifuge comprises the hanging bag centrifuge main shaft top sealing device according to any one of claims 1-6.

Images