Mechanical seal for a container agitator
By designing an anti-overflow mechanical seal for the mixing vessel, and utilizing a combination of a throttling bushing and an O-ring, the problem of seal failure caused by material reaction in the mixing equipment is solved, thereby improving the reliability and service life of the seal.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- FUSHUN DONGLIAN SEALS CO LTD
- Filing Date
- 2025-08-14
- Publication Date
- 2026-06-26
AI Technical Summary
Existing mixing equipment is prone to chemical reactions between materials during operation, leading to over-extension and over-burden phenomena, resulting in mechanical seal failure, leakage, and shortened service life.
The anti-overflow mechanical seal of the containerized mixing vessel is adopted, which includes a combination design of mechanical seal body, throttling bushing, sealing shaft sleeve, O-ring rubber seal and rotating sleeve. The throttling bushing prevents material from entering the seal, and the O-ring seal provides secondary sealing to ensure that no material accumulates on the sealing surface.
It effectively prevents materials from entering the seal, ensures the normal operation of the mechanical seal, reduces losses caused by material reactions, extends the seal's service life, and guarantees production quality and cost control.
Smart Images

Figure CN224414361U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of mechanical seal technology for stirred tanks, specifically a mechanical seal for a stirred tank with anti-overflow mechanism. Background Technology
[0002] Mechanical seals are widely used in industries such as petrochemicals, pharmaceuticals, food, and water treatment. During production, to ensure that chemical reactions occur in a sealed environment—for example, in the petrochemical industry to ensure thorough mixing and reaction, in the pharmaceutical industry to ensure the sterility and cleanliness of medicines during reaction, and in food processing to prevent food contamination—stirring equipment often experiences chemical reactions between materials during operation. This can lead to overflow or leaks, causing mechanical seal failure, leakage, and a shortened lifespan. Often, if the reaction is not completed in a single feeding, the mechanical seal will fail, resulting in serious material contamination and incalculable losses to product quality. Utility Model Content
[0003] To address the shortcomings of existing technologies, this utility model provides a mechanical seal for an anti-overflow mixing vessel, which solves the problem that existing mixing equipment often experiences chemical reactions between materials during operation, resulting in overflow and leakage, which causes mechanical seal failure, leakage, and shortened service life.
[0004] To achieve the above objectives, this utility model is implemented through the following technical solution: a mechanical seal for an anti-overflow mixing vessel, comprising a mechanical seal body, a throttling bushing inserted inside the lower end of the mechanical seal body, a sealing bushing connected to the lower end of the throttling bushing, and a mechanical seal stationary ring and a rotating sleeve respectively installed in the inner walls of the throttling bushing and the sealing bushing.
[0005] Preferably, the mechanical seal body has several O-rings installed inside.
[0006] This utility model provides a mechanical seal for an anti-overflow mixing vessel, which has the following advantages: when the material rises, the throttling bushing prevents the material from entering the seal. Even if a small amount of material enters, the secondary sealing of the O-ring completely prevents the material from entering the seal, ensuring that the material is fed and reacted in one go, reducing losses caused by improper feeding or operation, reducing enterprise costs, and ensuring the smooth operation of the enterprise. It is beneficial for the operation of petrochemical, pharmaceutical, food, water treatment and other industries. Attached Figure Description
[0007] Figure 1 This is a schematic diagram of the structure of this utility model.
[0008] In the diagram: 1. O-ring rubber seal; 2. Throttling bushing; 3. Sealing bushing; 4. Rotary sleeve; 5. Rotary sleeve. Detailed Implementation
[0009] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0010] Please see Figure 1 This utility model provides a technical solution: a mechanical seal for an anti-overflow containerized mixing vessel, comprising a mechanical seal body, a throttling bushing 2 inserted inside the lower end of the mechanical seal body, a sealing bushing 3 connected to the lower end of the throttling bushing 2, and a mechanical seal stationary ring 5 and a rotating sleeve 4 respectively installed in the inner walls of the throttling bushing 2 and the sealing bushing 3.
[0011] The throttling bushing 2 and sealing bushing 3 structure set before the O-ring rubber seal 1 can prevent material from accumulating and entering the seal, ensuring that the mechanical seal can operate normally.
[0012] Furthermore, the mechanical seal body is internally fitted with several O-ring rubber seals 1.
[0013] Those skilled in the art can connect the components in this case sequentially. The specific connection and operation sequence should refer to the working principle described below. The detailed connection methods are well-known technologies in the field. The working principle and process are mainly described below.
[0014] Example: During use, when the material rises and comes into contact with the seal, the throttling bushing 2, together with the sealing bushing 3, the mechanical seal stationary ring 5, and the rotating sleeve 4, can prevent the material from rising. Even if a small amount of material enters the seal, several O-ring rubber seals 1 can also play a secondary sealing role, ensuring that no material accumulates between the sealing surfaces so that the mechanical seal can operate normally.
[0015] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, the phrase "comprising an element defined as..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.
[0016] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A mechanical seal for an anti-overflow mixing vessel, comprising a mechanical seal body, characterized in that: A throttling bushing (2) is inserted inside the lower end of the mechanical seal body. A sealing bushing (3) is connected to the lower end of the throttling bushing (2). A mechanical seal stationary ring (5) and a rotating sleeve (4) are respectively installed in the inner walls of the throttling bushing (2) and the sealing bushing (3).
2. The anti-overflow mechanical seal for a mixing vessel according to claim 1, characterized in that, The mechanical seal body is internally fitted with several O-ring rubber seals (1).