Leakage-proof structure of shaft seal of stirrer

Abstract

The utility model relates to the technical field of shaft seal devices, in particular to a leakproof structure of a mixer shaft seal, which comprises a mounting seat, a movable ring seat is slidably mounted on the inner wall of the mounting seat, a transmission ring is rotatably mounted in the movable ring seat, two symmetrical clamping grooves are formed in the side wall of the transmission ring in a penetrating manner, and the movable ring seat is slidably mounted in the clamping grooves. A rotating ring is slidably mounted on the inner wall of the transmission ring, a plurality of evenly-distributed elastic telescopic rods are fixedly connected to the inner wall of the rotating ring, and the other ends of the elastic telescopic rods are fixedly connected to the side wall of the transmission ring. According to the utility model, under the matching of the plurality of bumps and the grooves, the transmission ring rotates to drive the rotating ring to rotate and is tightly attached to the static ring, effective sealing is formed under the action of the sealing ring and the O-shaped ring, and when the stirrer runs for a long time and the static ring and the rotating ring are abraded, the plurality of spring telescopic rods lose force and rebound, so that the static ring and the rotating ring are prevented from being damaged. The rotating ring is always tightly attached to the surface of the static ring, and material leakage is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of shaft sealing devices, in particular to a leakage-proof structure of a shaft seal of a mixer. Background Art

[0002] In many industries such as chemical, food, and pharmaceuticals, mixers are essential equipment used to fully mix various solid, liquid, or gaseous raw materials to achieve the uniformity required by the production process. The mixer's shaft seal is a key component connecting the power source and the stirring blades. It needs to remain stable during rotation and prevent material leakage.

[0003] Due to the long-term operation of the existing mixer, the seal inside the shaft seal will cause wear and tear, and the sealing performance will decrease, causing the material to leak out along the wear area. For the material being stirred, the seal inside the shaft seal is damaged, and valuable products will continue to leak out, causing direct product waste and increasing production costs. In view of this, a leakage-proof structure for the mixer shaft seal is provided. Utility Model Content

[0004] The main purpose of the utility model is to provide a leakage-proof structure for a mixer shaft seal, so as to solve the problem proposed in the related art that the seal inside the shaft seal is worn due to long-term operation, the sealing performance is reduced, and the material leaks out along the worn part.

[0005] In order to achieve the above-mentioned purpose, according to one aspect of the utility model, a leakage-proof structure of a mixer shaft seal is provided, including a mounting seat, a dynamic ring seat is slidably mounted on the inner wall of the mounting seat, a transmission ring is rotatably mounted inside the dynamic ring seat, two symmetrical slots are penetrated through the side wall of the transmission ring, a rotating ring is slidably mounted on the inner wall of the transmission ring, a plurality of evenly distributed elastic telescopic rods are fixedly connected to the inner wall of the rotating ring, the other end of the elastic telescopic rod is fixedly connected to the side wall of the transmission ring, a pressure cover is slidably mounted on the outer periphery of the dynamic ring seat, a static ring is inlaid on the side wall of the pressure cover, and a locking assembly for fixing the dynamic ring seat is provided inside the mounting seat.

[0006] Furthermore, a plurality of evenly distributed grooves are provided inside the transmission ring, and bumps are slidably installed inside the grooves, and the side walls of the bumps are fixedly connected to the outer wall of the rotating ring.

[0007] Furthermore, a sliding groove is provided inside the mounting seat, and a limiting hole communicating with the sliding groove is provided through the side wall of the mounting seat, and a sliding hole penetrating with the sliding groove is provided on the side wall of the dynamic ring seat.

[0008] Furthermore, the locking assembly includes a sliding rod, one end of which passes through the limiting hole and is slidably inserted into the sliding groove.

[0009] Furthermore, the other end of the sliding rod is rotatably connected to a pull ring, and the outer wall of the sliding rod is fixedly connected to a limit block.

[0010] Furthermore, the limit block is slidably installed in the slide groove, the side wall of the limit block is fixedly connected to a spring, and the other end of the spring is fixedly connected to the inside of the slide groove.

[0011] Furthermore, an O-ring and a sealing ring are fixedly connected to the outer wall of the static ring.

[0012] Furthermore, the outer wall of the O-ring is fixedly connected to the gland, and the outer wall of the sealing ring is tightly fitted with the inner wall of the dynamic ring seat.

[0013] Furthermore, the side wall of the gland is threadedly connected with a plurality of evenly distributed locking bolts.

[0014] Furthermore, one end of the locking bolt passes through the gland and is threadedly connected to the mounting seat, and a plurality of evenly distributed mounting holes are formed through the side wall of the mounting seat.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] In the leakage-proof structure of the mixer shaft seal, through the cooperation of multiple protrusions and grooves, when the transmission ring rotates, the rotating ring will rotate and fit tightly with the static ring. Under the action of the sealing ring and the O-ring, an effective seal is formed. When the mixer runs for a long time and causes wear to the static ring and the rotating ring, the multiple spring telescopic rods will lose force and rebound, ensuring that the rotating ring always fits tightly with the surface of the static ring to prevent material leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a three-dimensional schematic diagram of a shaft seal in a preferred embodiment of the present utility model;

[0018] Figure 2 This is a cross-sectional view of the structure of the shaft seal in the preferred embodiment of the present utility model;

[0019] Figure 3 This is an exploded view of the shaft seal in the preferred embodiment of the present utility model;

[0020] Figure 4 This is an exploded view of the static ring in the preferred embodiment of the present utility model;

[0021] Figure 5 This is a schematic structural diagram of the sliding rod in a preferred embodiment of the present utility model;

[0022] Figure 6 for Figure 3 Enlarged view of point A in the middle;

[0023] Illustration:

[0024] 1. Mounting seat; 2. Dynamic ring seat; 3. Pressure cover; 4. Locking bolt; 5. Sliding rod; 6. Pull ring; 7. Transmission ring; 8. Rotating ring; 9. Bump; 10. Sealing ring; 11. O-ring; 12. Static ring; 13. Sliding hole; 14. Spring; 15. Limit block; 16. Slide groove; 17. Elastic telescopic rod; 18. Groove; 19. Slot. DETAILED DESCRIPTION

[0025] In order to further illustrate the technical means and effects adopted by the present invention to achieve the predetermined purpose of the utility model, the following is a detailed description of the specific implementation method, structure, characteristics and effects of the present invention in combination with the accompanying drawings and preferred embodiments.

[0026] See also Figures 1-6 As shown, the purpose of this embodiment is to provide a leakage-proof structure for the shaft seal of a mixer, including a mounting seat 1, a dynamic ring seat 2 is slidably mounted on the inner wall of the mounting seat 1, the dynamic ring seat 2 is used to mount a rotating ring 8, a transmission ring 7 is rotatably mounted inside the dynamic ring seat 2, the transmission ring 7 is used to effectively transmit the rotational motion of the stirring shaft to the rotating ring 8, two symmetrical card grooves 19 are provided through the side wall of the transmission ring 7, the card block of the outer shaft of the stirring shaft is inserted into the card groove 19, and when the stirring shaft rotates, the card groove 19 will be driven to rotate, the inner wall of the transmission ring 7 is slidably mounted with a rotating ring 8, a plurality of evenly distributed grooves 18 are provided inside the transmission ring 7, a protrusion 9 is slidably mounted inside the groove 18, the side wall of the protrusion 9 is fixedly connected to the outer wall of the rotating ring 8, and the inner wall of the rotating ring 8 is fixedly connected with a plurality of evenly distributed elastic telescopic Rod 17, the other end of the elastic telescopic rod 17 is fixedly connected to the side wall of the transmission ring 7, and a pressure cover 3 is slidably installed on the outer periphery of the dynamic ring seat 2. The pressure cover 3 is used to install the static ring 12. During installation, a certain axial pressure can be applied to make the static ring 12 fit tightly with the rotating ring 8. The side wall of the pressure cover 3 is inlaid with a static ring 12. The outer wall of the static ring 12 is fixedly connected with an O-ring 11 and a sealing ring 10 respectively. The outer wall of the O-ring 11 is fixedly connected to the pressure cover 3. The O-ring 11 is used to prevent liquid or gas from leaking from the gap between the static ring 12 and the surrounding components, ensuring the sealing between the pressure cover 3 and the dynamic ring seat 2. The outer wall of the sealing ring 10 is tightly fitted with the inner wall of the dynamic ring seat 2. The sealing ring 10 is used to cooperate with the static ring 12 and the rotating ring 8 to form an effective seal. The interior of the mounting seat 1 is provided with a locking assembly for fixing the dynamic ring seat 2;

[0027] When the agitator shaft rotates, the transmission ring 7 is driven to rotate through the slot 19, and the rotating ring 8 is driven to rotate under the cooperation of the protrusion 9 and the groove 18. The rotating ring 8 rotates and fits tightly with the static ring 12, and forms an effective seal under the action of the sealing ring 10. When the mixer runs for too long, it will cause wear to the static ring 12 and the rotating ring 8. At this time, the rotating ring 8 is moved by multiple elastic telescopic rods 17 to ensure that the rotating ring 8 is always tightly fitted with the static ring 12, thereby ensuring the sealing performance of the shaft seal and preventing material leakage from the worn area.

[0028] The interior of the mounting seat 1 is provided with a slide groove 16, and the side wall of the mounting seat 1 is penetrated by a limiting hole connected to the slide groove 16. The side wall of the dynamic ring seat 2 is provided with a slide hole 13 penetrating the slide groove 16. The locking assembly includes a sliding rod 5. One end of the sliding rod 5 passes through the limiting hole and is slidably inserted into the slide groove 16. The other end of the sliding rod 5 is rotatably connected to a pull ring 6. Pulling the pull ring 6 can drive the sliding rod 5 to slide out of the slide hole 13, thereby releasing the fixation of the dynamic ring seat 2. The outer wall of the sliding rod 5 is fixedly connected to the limiting block 15, and the limiting block 15 is slidably installed in the slide groove 16. Through the limiting block 15, the limiting hole and the slide groove 16, the locking assembly is fixed to the outer wall of the sliding rod 5. When the pull ring 6 is released, the spring 14 loses its force and recovers, driving the sliding rod 5 to slide into the sliding hole 13, thereby fixing the dynamic ring seat 2. The side wall of the pressure cover 3 is threadedly connected with a plurality of evenly distributed locking bolts 4, and one end of the locking bolt 4 passes through the pressure cover 3 and is threadedly connected to the mounting seat 1. The side wall of the mounting seat 1 is provided with a plurality of evenly distributed mounting holes.

[0029] The mounting base 1 can be fixed to the body of the mixer through multiple mounting holes. The gland 3 is fixed by tightening multiple locking bolts 4, and a stable pressing force is applied to the static ring 12 and the O-ring 11 to maintain the sealing effect. When the shaft seal needs to be repaired or fails, the gland 3 is released by loosening the multiple locking bolts 4, and the sliding rod 5 is pulled out of the sliding hole 13 by pulling the pull ring 6 to release the fixation of the dynamic ring seat 2, thereby realizing quick disassembly and assembly, and repairing or replacing the various components of the shaft seal.

[0030] When the present invention is used, the mixer is running, and the mixing shaft drives the transmission ring 7 to rotate through the slot 19, and drives the rotating ring 8 to rotate under the cooperation of the protrusion 9 and the groove 18. The rotating ring 8 rotates and fits tightly with the static ring 12, and forms an effective seal under the action of the sealing ring 10. When the mixer runs for too long, it will cause wear to the static ring 12 and the rotating ring 8. At this time, the rotating ring 8 is moved by multiple elastic telescopic rods 17 to ensure that the rotating ring 8 always fits tightly with the static ring 12, ensuring the sealing performance of the shaft seal and preventing material from leaking from the worn area. When the shaft seal needs maintenance or fails, the multiple locking bolts 4 are loosened to release the fixation of the pressure cover 3, and the pull ring 6 is pulled to make the sliding rod 5 slide out of the sliding hole 13 to release the fixation of the dynamic ring seat 2, thereby realizing quick disassembly and assembly, and repairing or replacing the various components of the shaft seal.

[0031] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to equivalent embodiments using the technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A leakage-proof structure for a shaft seal of a mixer, comprising a mounting seat (1), a dynamic ring seat (2) being slidably mounted on the inner wall of the mounting seat (1), a transmission ring (7) being rotatably mounted inside the dynamic ring seat (2), two symmetrical slots (19) being formed through the side wall of the transmission ring (7), a rotating ring (8) being slidably mounted on the inner wall of the transmission ring (7), and characterized in that: The inner wall of the rotating ring (8) is fixedly connected to a plurality of evenly distributed elastic telescopic rods (17), the other ends of the elastic telescopic rods (17) are fixedly connected to the side wall of the transmission ring (7), a pressure cover (3) is slidably mounted on the outer periphery of the dynamic ring seat (2), the side wall of the pressure cover (3) is inlaid with a static ring (12), and a locking assembly for fixing the dynamic ring seat (2) is provided inside the mounting seat (1).

2. The anti-leakage structure of the mixer shaft seal according to claim 1, characterized in that: The transmission ring (7) is provided with a plurality of evenly distributed grooves (18), and a protrusion (9) is slidably mounted inside the groove (18), and the side wall of the protrusion (9) is fixedly connected to the outer wall of the rotating ring (8).

3. The anti-leakage structure of the mixer shaft seal according to claim 2, characterized in that: A sliding groove (16) is provided inside the mounting seat (1), and a limiting hole communicating with the sliding groove (16) is provided through the side wall of the mounting seat (1), and a sliding hole (13) is provided on the side wall of the dynamic ring seat (2) that penetrates the sliding groove (16).

4. The anti-leakage structure of the mixer shaft seal according to claim 3, characterized in that: The locking assembly comprises a sliding rod (5), one end of which passes through a limiting hole and is slidably inserted into a sliding groove (16).

5. The anti-leakage structure of the mixer shaft seal according to claim 4, characterized in that: The other end of the sliding rod (5) is rotatably connected to a pull ring (6), and the outer wall of the sliding rod (5) is fixedly connected to a limiting block (15).

6. The anti-leakage structure of the mixer shaft seal according to claim 5, characterized in that: The limit block (15) is slidably installed in the slide groove (16), the side wall of the limit block (15) is fixedly connected with a spring (14), and the other end of the spring (14) is fixedly connected to the inside of the slide groove (16).

7. The anti-leakage structure of the mixer shaft seal according to claim 6, characterized in that: An O-ring (11) and a sealing ring (10) are fixedly connected to the outer wall of the static ring (12).

8. The anti-leakage structure of the mixer shaft seal according to claim 7, characterized in that: The outer wall of the O-ring (11) is fixedly connected to the gland (3), and the outer wall of the sealing ring (10) is tightly fitted to the inner wall of the dynamic ring seat (2).

9. The anti-leakage structure of the mixer shaft seal according to claim 8, characterized in that: The side wall of the gland (3) is threadedly connected with a plurality of evenly distributed locking bolts (4).

10. The anti-leakage structure of the mixer shaft seal according to claim 9, characterized in that: One end of the locking bolt (4) passes through the gland (3) and is threadedly connected to the mounting seat (1). The side wall of the mounting seat (1) is provided with a plurality of evenly distributed mounting holes.

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