Rotating shaft sealing mechanism of liquid mixing device

Abstract

The utility model relates to the technical field of mechanical sealing, and discloses a rotating shaft sealing mechanism of a liquid mixing device, which comprises a sealing sleeve, an oil filling hole is arranged on the left side surface of the sealing sleeve, a blocking cover is arranged above the sealing sleeve, and a sealing shaft sleeve assembly is arranged in the sealing sleeve. A sealing cover is fixedly connected to the left side surface of the sealing sleeve, a through hole is formed in the left side surface of the sealing cover, a sealing plate is arranged on the inner wall surface of the left side of the sealing cover, an elastic piece is fixedly connected to the right side surface of the sealing plate, and a moving plate is fixedly connected to the right end of the elastic piece; and a moving unit is arranged on the right side of the moving plate. According to the oiling device, through cooperation of the through hole, the sealing plate, the elastic piece, the moving plate and the moving unit, the sealing cover can be rapidly and completely opened, elastic potential energy of a spring does not need to be overcome to do work, a worker can conduct oiling operation with two hands, and the operation difficulty is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical seals, in particular to a shaft sealing mechanism for a liquid mixing device. Background Technique

[0002] The shaft sealing mechanism of a liquid mixing device is a component used to prevent liquid leakage and ensure the stability of the internal environment of the mixing device. This kind of sealing mechanism is usually used in equipment such as agitators, pumps, reactors, etc. Its main purpose is to provide a seal where the rotating shaft passes through the container wall to prevent the escape of liquid or gas or the entry of external substances.

[0003] After retrieval, the Chinese patent publication number: CN220986367U discloses a rotating shaft sealing device, which includes a multi-ring stepped sealing structure, changing the original linear leakage surface to a stepped leakage surface, slowing down the leakage by increasing the leakage resistance and changing the leakage channel, and this device can also achieve a self-sealing effect. After a period of time, materials will accumulate in the leakage channel to enhance the sealing effect.

[0004] In the actual use process of the above-mentioned shaft sealing mechanism, when adding sealing oil to the inside of the seal, it is necessary to push open the sealing baffle to overcome the elastic potential energy of the spring, so that the sealing oil or flexible material enters the oil filling hole through the oil filling channel, resulting in the need to keep pushing against the sealing baffle during the oil filling process. When a single worker operates, it is extremely inconvenient, thus affecting the oil filling efficiency. Therefore, a shaft sealing mechanism for a liquid mixing device is proposed to solve the above problems. Summary of the Utility Model

[0005] In order to make up for the above deficiencies, the utility model provides a shaft sealing mechanism for a liquid mixing device, aiming to improve the problem that the elastic potential energy of the spring needs to be continuously overcome when filling sealing oil into the seal in the prior art, which affects the oil filling efficiency.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme: A shaft sealing mechanism for a liquid mixing device includes a sealing sleeve. An oil filling hole is opened on the left surface of the sealing sleeve. A baffle cover is arranged above the sealing sleeve. A seal shaft sleeve assembly is arranged inside the sealing sleeve. A sealing cover is fixedly connected to the left surface of the sealing sleeve. A through hole is opened on the left surface of the sealing cover. A sealing plate is arranged on the left inner wall surface of the sealing cover. An elastic member is fixedly connected to the right surface of the sealing plate. The right end of the elastic member is fixedly connected to a moving plate. A moving unit is arranged on the right side of the moving plate, and the moving unit is used for the linear movement of the moving plate back and forth.

[0007] As a further description of the above technical solution:

[0008] A chamfer is provided on the left side of the inner wall of the through hole, and the through hole is directly to the left of the fuel filling hole.

[0009] As a further description of the above technical solution:

[0010] The moving unit includes an upper fixing sleeve and a lower fixing sleeve. The upper fixing sleeve and the lower fixing sleeve are respectively fixedly connected to the upper and lower sides of the right surface of the moving plate. The upper side of the inner wall surface of the front side of the sealing cover is rotatably connected with a screw rod. The rear end of the screw rod passes through the upper fixing sleeve and the sealing cover. The rear end of the screw rod is fixedly connected with a circular plate. The inner wall surface of the front side of the sealing cover is fixedly connected with a guide rod.

[0011] As a further description of the above technical solution:

[0012] A card slot is provided on the back surface of the circular plate. A fixing frame is fixedly connected to the back surface of the sealing cover. A pull plate is arranged at the rear side of the fixing frame. A limiting rod is fixedly connected to the front surface of the pull plate. A tension spring is sleeved on the outer side of the limiting rod.

[0013] As a further description of the above technical solution:

[0014] The left surface of the sealing plate fits with the left inner wall surface of the sealing cover.

[0015] As a further description of the above technical solution:

[0016] The screw rod is threadedly connected with the upper fixing sleeve, and anti-slip lines are provided on the outer side of the circular plate.

[0017] As a further description of the above technical solution:

[0018] The rear end of the guide rod passes through the lower fixing sleeve, and the rear end of the guide rod is fixedly connected with the inner wall surface of the rear side of the sealing cover.

[0019] As a further description of the above technical solution:

[0020] The front end of the limiting rod passes through the fixing frame, the front end of the limiting rod is clamped inside the card slot, the front end of the tension spring is fixedly connected with the front surface of the fixing frame, and the rear end of the tension spring is fixedly connected with the front surface of the pull plate.

[0021] The utility model has the following beneficial effects:

[0022] 1. In the present utility model, through the cooperation of the through hole, the sealing plate, the elastic member, the moving plate and the moving unit, the sealing cover can be quickly and fully opened without having to overcome the elastic potential energy of the spring. The staff can perform the refueling operation with both hands, reducing the operation difficulty. At the same time, by squeezing the elastic member to generate elastic potential energy, the sealing plate fits more closely to the inner wall surface of the left side of the sealing cover, thus avoiding the leakage of sealing oil or the entry of external dust and impurities into the sealing sleeve.

[0023] 2. In the present utility model, through the cooperation of the card slot, the fixing frame, the pulling plate, the limiting rod and the pulling spring, when the sealing plate seals and closes the through hole, the circular plate can be clamped and fixed to prevent the circular plate from rotating slightly when the rotating shaft vibrates during operation, which may cause the through hole to be opened and cause adverse effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic diagram of the whole rotating shaft sealing mechanism of a liquid mixing device proposed by the present utility model;

[0025] Figure 2 is a schematic diagram of the sealing sleeve, the retaining cover and the sealing shaft sleeve assembly of the rotating shaft sealing mechanism of a liquid mixing device proposed by the present utility model;

[0026] Figure 3 is a schematic diagram of the inside of the sealing cover of the rotating shaft sealing mechanism of a liquid mixing device proposed by the present utility model;

[0027] Figure 4 is a schematic diagram of the moving plate and the moving unit of the rotating shaft sealing mechanism of a liquid mixing device proposed by the present utility model;

[0028] Figure 5 is a schematic diagram of the sealing cover of the rotating shaft sealing mechanism of a liquid mixing device proposed by the present utility model;

[0029] Figure 6 is a rotating shaft sealing mechanism of a liquid mixing device proposed by the present utility model Figure 3 schematic diagram of part A.

[0030] LEGEND DESCRIPTION:

[0031] 1. Sealing sleeve; 2. Refueling hole; 3. Retaining cover; 4. Sealing shaft sleeve assembly; 5. Sealing cover; 6. Through hole; 61. Chamfer; 7. Sealing plate; 8. Elastic member; 9. Moving plate; 91. Upper fixing sleeve; 92. Lower fixing sleeve; 93. Screw; 94. Circular plate; 95. Guide rod; 10. Card slot; 11. Fixing frame; 12. Pulling plate; 13. Limiting rod; 14. Pulling spring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0032] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0033] Referring to Figure 1 - Figure 2 , an embodiment provided by the present invention: a shaft sealing mechanism of a liquid mixing device, including a sealing sleeve 1. An oil filling hole 2 is provided on the left surface of the sealing sleeve 1. A retaining cover 3 is arranged above the sealing sleeve 1. A sealing shaft sleeve assembly 4 is arranged inside the sealing sleeve 1. Sealing oil can be injected into the sealing sleeve 1 through the oil filling hole 2 to supplement the consumed sealing oil and improve the stability of the sealing mechanism during operation.

[0034] Referring to Figure 3 - Figure 5 , a sealing cover 5 is fixedly connected to the left surface of the sealing sleeve 1. A through hole 6 is provided on the left surface of the sealing cover 5. A chamfer 61 is provided on the left inner wall of the through hole 6. The through hole 6 is located directly to the left of the oil filling hole 2. A sealing plate 7 is arranged on the left inner wall surface of the sealing cover 5. The left surface of the sealing plate 7 is in mutual fit with the left inner wall surface of the sealing cover 5. In the initial state, the sealing plate 7 seals the through hole 6 to prevent impurities in the outside air from entering the sealing sleeve 1 through the oil filling hole 2 and affecting the operation of the sealing mechanism. When dust and impurities fall on the inner wall of the through hole 6 and the staff needs to open the through hole 6, the dust and impurities can be cleaned along the inclined surface of the chamfer 61 by wiping or blowing. At the same time, some of the dust and impurities falling on the inner wall of the through hole 6 can also slide down along the inclined surface of the chamfer 61 to reduce the accumulation of dust and impurities. An elastic member 8 is fixedly connected to the right surface of the sealing plate 7. The right end of the elastic member 8 is fixedly connected to a moving plate 9. In the initial state, the moving plate 9 is limited, and the elastic member 8 is in a compressed state, generating elastic potential energy and acting on the sealing plate 7 to squeeze the sealing plate 7, so that the sealing plate 7 fits more closely with the left inner wall surface of the sealing cover 5, thereby avoiding the leakage of sealing oil or the entry of outside dust and impurities into the sealing sleeve 1.

[0035] A moving unit is provided on the right side of the moving plate 9. The moving unit includes an upper fixing sleeve 91 and a lower fixing sleeve 92. The upper fixing sleeve 91 and the lower fixing sleeve 92 are respectively fixedly connected to the upper and lower sides of the right surface of the moving plate 9. When the moving plate 9 moves, it can drive the upper fixing sleeve 91 and the lower fixing sleeve 92 to move synchronously. On the upper side of the inner wall surface of the front side of the sealing cover 5, a screw rod 93 is rotatably connected. The screw rod 93 is threadedly connected to the upper fixing sleeve 91. The rear end of the screw rod 93 passes through the upper fixing sleeve 91 and the sealing cover 5. The rear end of the screw rod 93 is fixedly connected with a circular plate 94. Anti-slip patterns are provided on the outer side of the circular plate 94, which can increase the friction with the palm of the staff and avoid slipping. The staff can drive the screw rod 93 to rotate by turning the circular plate 94, and then drive the moving plate 9 to move synchronously through the upper fixing sleeve 91. A guide rod 95 is fixedly connected to the inner wall surface of the front side of the sealing cover 5. The rear end of the guide rod 95 passes through the lower fixing sleeve 92. The rear end of the guide rod 95 is fixedly connected to the inner wall surface of the rear side of the sealing cover 5. The lower fixing sleeve 92 can move linearly in the front-rear direction along the guide rod 95, and thus can guide and limit the movement of the moving plate 9.

[0036] Refer to Figure 4 and Figure 6 , a clamping groove 10 is provided on the back surface of the circular plate 94. A fixing frame 11 is fixedly connected to the back surface of the sealing cover 5. A pull plate 12 is provided on the rear side of the fixing frame 11. A limiting rod 13 is fixedly connected to the front surface of the pull plate 12. When the pull plate 12 moves, it can drive the limiting rod 13 to move synchronously. The front end of the limiting rod 13 passes through the fixing frame 11, and the front end of the limiting rod 13 is clamped inside the clamping groove 10. At this time, the limiting rod 13 can clamp and fix the circular plate 94, so that the circular plate 94 cannot rotate, avoiding slight rotation of the circular plate 94 caused by jitter during the operation of the rotating shaft, resulting in the opening of the through hole 6 and causing adverse effects. A tension spring 14 is sleeved on the outer side of the limiting rod 13. The front end of the tension spring 14 is fixedly connected to the front surface of the fixing frame 11, and the rear end of the tension spring 14 is fixedly connected to the front surface of the pull plate 12. When the staff needs to turn the circular plate 94, the pull plate 12 can be pulled backward to drive the limiting rod 13 to move backward, and the tension spring 14 is pulled, so that the tension spring 14 stretches to generate elastic potential energy, and then drives the limiting rod 13 to leave the inside of the clamping groove 10, releasing the clamping and fixing of the circular plate 94, so that the circular plate 94 can rotate. When the circular plate 94 rotates to drive the sealing plate 7 to move back to its original position, the pull plate 12 can be released. At this time, the limiting rod 13 will quickly reset into the clamping groove 10 under the action of the elastic potential energy of the tension spring 14, restoring the clamping and fixing of the circular plate 94.

[0037] Working principle: When it is necessary to fill the sealing oil into the inside of the sealing sleeve 1 through the oil filling hole 2, the pull plate 12 can be pulled backward to drive the limit rod 13 to move, releasing the clamping and fixing of the circular plate 94. Subsequently, the circular plate 94 is rotated to drive the screw rod 93 to rotate, so that the moving plate 9 moves backward under the limitation of the upper fixing sleeve 91, the lower fixing sleeve 92 and the guide rod 95, thereby driving the elastic member 8 and the sealing plate 7 to move backward synchronously, so that the through hole 6 can be completely opened. At the same time, after opening, the staff does not need to do work against the elastic potential energy of the spring and can perform the oil filling operation with both hands, reducing the operation difficulty. When the sealing oil filling is completed, the staff rotates the circular plate 94 to drive the moving plate 9 to reset, which can drive the sealing plate 7 to reset, so that the sealing plate 7 quickly seals the through hole 6 under the action of the elastic potential energy of the elastic member 8, and the operation is simple and convenient.

[0038] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A shaft sealing mechanism for a liquid mixing device, comprising a sealing sleeve (1), characterized in that: An oil filling hole (2) is provided on the left surface of the sealing sleeve (1). A retaining cover (3) is arranged above the sealing sleeve (1). A sealing shaft sleeve assembly (4) is arranged inside the sealing sleeve (1). A sealing cover (5) is fixedly connected to the left surface of the sealing sleeve (1). A through hole (6) is provided on the left surface of the sealing cover (5). A sealing plate (7) is arranged on the left inner wall surface of the sealing cover (5). An elastic member (8) is fixedly connected to the right surface of the sealing plate (7). The right end of the elastic member (8) is fixedly connected to a moving plate (9). A moving unit is arranged on the right side of the moving plate (9), and the moving unit is used for the linear movement of the moving plate (9) back and forth.

2. The shaft sealing mechanism of a liquid mixing device according to claim 1, wherein: A chamfer (61) is provided on the left inner wall of the through hole (6), and the through hole (6) is directly to the left of the oil filling hole (2).

3. The shaft sealing mechanism of a liquid mixing device according to claim 1, wherein: The moving unit includes an upper fixing sleeve (91) and a lower fixing sleeve (92). The upper fixing sleeve (91) and the lower fixing sleeve (92) are respectively fixedly connected to the upper and lower sides of the right surface of the moving plate (9). The upper side of the front inner wall surface of the sealing cover (5) is rotatably connected to a screw rod (93). The rear end of the screw rod (93) passes through the upper fixing sleeve (91) and the sealing cover (5). The rear end of the screw rod (93) is fixedly connected to a circular plate (94). A guide rod (95) is fixedly connected to the front inner wall surface of the sealing cover (5).

4. The shaft sealing mechanism of a liquid mixing device according to claim 3, characterized in that: A card slot (10) is provided on the back surface of the circular plate (94). A fixing frame (11) is fixedly connected to the back surface of the sealing cover (5). A pull plate (12) is arranged at the rear side of the fixing frame (11). A limiting rod (13) is fixedly connected to the front surface of the pull plate (12). A tension spring (14) is sleeved on the outer side of the limiting rod (13).

5. The shaft sealing mechanism of a liquid mixing device according to claim 1, characterized in that: The left surface of the sealing plate (7) is in mutual fit with the left inner wall surface of the sealing cover (5).

6. The shaft sealing mechanism of a liquid mixing device according to claim 3, characterized in that: The screw rod (93) is in threaded connection with the upper fixing sleeve (91), and anti-slip lines are provided on the outer side of the circular plate (94).

7. The shaft sealing mechanism of a liquid mixing device according to claim 3, characterized in that: The rear end of the guide rod (95) passes through the lower fixing sleeve (92), and the rear end of the guide rod (95) is fixedly connected to the rear inner wall surface of the sealing cover (5).

8. The shaft sealing mechanism of a liquid mixing device according to claim 4, characterized in that: The front end of the limiting rod (13) passes through the fixing frame (11), and the front end of the limiting rod (13) is clamped inside the card slot (10). The front end of the tension spring (14) is fixedly connected to the front surface of the fixing frame (11), and the rear end of the tension spring (14) is fixedly connected to the front surface of the pull plate (12).

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