A leak-proof sealing structure for sterilizers
By employing a dual sealing assembly and a pressure relief assembly in the sterilizer, the problem of easy leakage of the sealing structure under high temperature and high pressure is solved, thus achieving the stability of the steam seal and the safety of the equipment.
Patent Information
- Application Number
- CN202522057025.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-24
- Publication Date
- 2026-11-06
- Estimated Expiration
- 2035-09-24
AI Technical Summary
Existing sterilizer sealing structures are prone to slight deformation under long-term high temperature and high pressure conditions, leading to gaps between the sealing cap and the cylinder, leakage of high-pressure steam, resulting in energy waste and the risk of burns.
It employs a dual sealing assembly and a pressure relief assembly, including a side sealing ring and an end face sealing ring, which are connected through vents to balance the pressure. Combined with the pressure relief assembly, it automatically regulates the pressure to prevent steam leakage and equipment damage.
It effectively prevents steam leakage, reduces energy waste, avoids burns to operators, and ensures safe operation of equipment and long-term stability of the sealing structure.
Smart Images
Figure CN224937409U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of sterilization equipment technology, and in particular to a leak-proof sealing structure for a sterilizer. Background Technology
[0002] As a core sterilization device in the medical, biopharmaceutical, and food processing fields, the core working principle of sterilizers is to sterilize medical devices, culture media, food packaging, and other items by using saturated steam at a high temperature of 121-132℃ and a high pressure of 0.12-0.2MPa. The reliability of the sealing structure directly determines whether the sterilizer can maintain a stable high-temperature and high-pressure environment, which is the key to ensuring sterilization effect and avoiding steam leakage.
[0003] Existing sterilizers mostly use a single sealing structure. Under long-term high temperature and high pressure conditions, the sealing cover is prone to slight deformation due to steam pressure, resulting in a gap between the end face of the sealing cover and the top face of the sterilizer cylinder. High-pressure steam seeps and leaks from the end face gap, which not only wastes energy but may also cause burns to operators due to steam contact. Therefore, improvements are needed. Utility Model Content
[0004] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a leak-proof sealing structure for sterilizers. This solves the problem that the existing sterilizer sealing structures mostly adopt a single sealing structure. Under long-term high temperature and high pressure conditions, the sealing cover is prone to slight deformation under the action of steam pressure, resulting in a gap between the end face of the sealing cover and the top face of the sterilizer cylinder. High-pressure steam seeps and leaks from the end face gap, which not only wastes energy, but may also cause the operator to be burned due to steam contact.
[0005] In view of this, the present invention provides a leak-proof sealing structure for a sterilizer, including a sealing cap installed at one end of the sterilizer cylinder, a fixing bolt threaded to the edge of the sealing cap, a clamping block sleeved on the outside of the fixing bolt, and a sealing component and a pressure relief component provided between the sealing cap and the sterilizer cylinder. The sealing assembly includes a hollow inner cover, a first vent, several second vents, a side sealing ring, an end face sealing ring, and several annular protrusions. The hollow inner cover is fixedly connected to the inner side of the sealing cover. The first vent is located in the middle of the sealing cover. Several second vents are located on the side wall of the hollow inner cover. The side sealing ring is fitted around the edge of the hollow inner cover. The end face sealing ring is fixedly connected between the hollow inner cover and the sealing cover. Several annular protrusions are fixedly connected to the inner side of one end of the sterilizer cylinder.
[0006] Optionally, the first vent is connected to the interior of the hollow inner cover, and a plurality of the second vents are connected to the interior of the hollow inner cover.
[0007] Optionally, the upper and lower edges of the side sealing ring are both fixedly connected to the side wall of the hollow inner cover.
[0008] Optionally, the hollow inner cover is located inside one end of the sterilizer cylinder, and the side sealing ring is located inside several annular protrusions, while the end face sealing ring abuts against the surface of one end of the sterilizer cylinder.
[0009] Optionally, one end of the clamping block abuts against the edge of one end of the sterilizer cylinder, and the sealing cap is fixedly installed at one end of the sterilizer cylinder by the cooperation of the fixing bolt and the clamping block.
[0010] Optionally, the pressure relief assembly includes an air valve, a fixed cylinder, a fixed cover, a filter screen, and an air port. The air valve is fixedly installed on one side of the sealing cover, the fixed cylinder is fixedly installed on one end of the air valve, and the fixed cover is fixedly installed on one end of the fixed cylinder.
[0011] Optionally, the filter screen is fixedly installed between the fixed cover and the fixed cylinder, and the air inlet is opened on both sides of the fixed cylinder.
[0012] Optionally, one end of the air valve is connected to the inside of the hollow inner cover, and the other end of the air valve is connected to the inside of the filter screen.
[0013] As can be seen from the above technical solutions, the embodiments of this utility model have the following advantages: 1. The present invention provides a leak-proof sealing structure for a sterilizer. By setting a sealing component, specifically, the side sealing ring fits into the annular protrusion on the inner side of the sterilizer cylinder, enhancing the tightness of the side seal. At the same time, the first air hole and the second air hole are connected to the interior of the hollow inner cover, which can balance the pressure and prevent the internal air pressure from excessively squeezing from the outside of the side sealing ring, which would lead to a deterioration in the sealing effect of the sealing ring, reduce the risk of steam leakage, and avoid energy waste and burns to operators.
[0014] 2. The present invention provides a leak-proof sealing structure for a sterilizer. By setting up a pressure relief component, specifically, overpressure gas is released through an air valve to prevent the sterilizer from being damaged due to excessive pressure, ensuring the safe operation of the equipment. At the same time, the filter screen inside the fixed cylinder can filter impurities in the pressure relief airflow, preventing the air valve from becoming clogged and extending the component's lifespan.
[0015] These features and advantages of the present invention will be disclosed in detail in the following specific embodiments and accompanying drawings. Attached Figure Description
[0016] The present invention will be further described below with reference to the accompanying drawings: Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the overall structure of the sealing cap of this utility model; Figure 3 This is a schematic diagram of the sterilization cylinder structure of this utility model; Figure 4 This is a schematic diagram of the pressure relief component of this utility model.
[0017] Explanation of reference numerals in the attached drawings: 1. Sterilizer cylinder; 2. Sealing cap; 3. Fixing bolt; 4. Clamping block; 501. Hollow inner cap; 502. First air hole; 503. Second air hole; 504. Side sealing ring; 505. End face sealing ring; 506. Annular protrusion; 601. Air valve; 602. Fixing cylinder; 603. Fixing cap; 604. Filter screen; 605. Air port. Detailed Implementation
[0018] The technical solutions of the present utility model will be explained and described below with reference to the accompanying drawings. However, the following embodiments are only preferred embodiments of the present utility model and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments in the implementation methods without creative effort are all within the protection scope of the present utility model.
[0019] The following describes in detail, with reference to the accompanying drawings, a leak-proof sealing structure for a sterilizer according to an embodiment of the present invention.
[0020] Example 1 For easier understanding, please refer to Figures 1 to 4 An embodiment of a leak-proof sealing structure for a sterilizer provided by this utility model includes a sealing cover 2 installed at one end of the sterilizer cylinder 1, a fixing bolt 3 threadedly connected to the edge of the sealing cover 2, a clamping block 4 sleeved on the outside of the fixing bolt 3, and a sealing assembly and a pressure relief assembly provided between the sealing cover 2 and the sterilizer cylinder 1. The sealing assembly includes a hollow inner cover 501, a first vent 502, several second vents 503, a side sealing ring 504, an end sealing ring 505, and several annular protrusions 506. The hollow inner cover 501 is fixedly connected to the inner side of the sealing cover 2. The first vent 502 is located in the middle of the sealing cover 2. Several second vents 503 are located on the side wall of the hollow inner cover 501. The side sealing ring 504 is fitted onto the edge of the hollow inner cover 501. The end sealing ring 505 is fixedly connected to the hollow inner cover 501 and the sealing cover 2. Between them, several annular protrusions 506 are fixedly connected to the inner side of one end of the sterilizer cylinder 1. The first air hole 502 is connected to the inside of the hollow inner cover 501. Several second air holes 503 are connected to the inside of the hollow inner cover 501. The upper and lower edges of the side sealing ring 504 are fixedly connected to the side wall of the hollow inner cover 501. The hollow inner cover 501 is located inside one end of the sterilizer cylinder 1, and the side sealing ring 504 is located inside several annular protrusions 506. The end face sealing ring 505 abuts against the surface of one end of the sterilizer cylinder 1.
[0021] It should be noted that the sealing assembly in this embodiment adopts a dual sealing design of side and end face: on the one hand, the side sealing ring 504 tightly fits the annular protrusion 506 on the inner side of the sterilizer cylinder 1, and the annular protrusion 506 can radially limit the side sealing ring 504, further enhancing the tightness of the side seal and preventing steam from leaking from the side gap between the cylinder and the hollow inner cover 501; on the other hand, the end face sealing ring 505 abuts against one end surface of the sterilizer cylinder 1, and cooperates with the sealing cover 2 and the hollow inner cover 501 to form The end face seal compensates for the shortcomings of a single seal. At the same time, the first vent 502 and the second vent 503 are connected to the interior of the hollow inner cover 501. During the sterilization process, the high-pressure steam in the cylinder can enter the interior of the hollow inner cover 501 through the first vent 502, and then achieve airflow through the second vent 503. This ultimately makes the pressure on the inner and outer sides of the side sealing ring 504 equal, avoids excessive pressure on the outer side of the side sealing ring 504, and prevents the sealing ring from deforming or shifting due to uneven force, thereby ensuring a long-term sealing effect.
[0022] In some embodiments, such as Figure 1 , Figure 2 As shown, one end of the clamping block 4 abuts against the edge of one end of the sterilizer cylinder 1, and the sealing cover 2 is fixedly installed at one end of the sterilizer cylinder 1 by the cooperation of the fixing bolt 3 and the clamping block 4.
[0023] It should be noted that the cooperation between the fixing bolt 3 and the clamping block 4 provides a stable axial clamping force for the sealing cover 2: when the fixing bolt 3 is tightened, the clamping block 4 will form a reverse support on the edge of the sterilizer cylinder 1, and at the same time press the sealing cover 2 towards the cylinder, ensuring that the end face sealing ring 505 is tightly fitted to the cylinder surface, and avoiding steam leakage due to the gap between the sealing cover 2 and the cylinder.
[0024] Example 2 In some embodiments, such as Figure 4 As shown, the pressure relief assembly includes an air valve 601, a fixed cylinder 602, a fixed cover 603, a filter screen 604, and an air port 605. The air valve 601 is fixedly installed on one side of the sealing cover 2, the fixed cylinder 602 is fixedly installed on one end of the air valve 601, the fixed cover 603 is fixedly installed on one end of the fixed cylinder 602, the filter screen 604 is fixedly installed between the fixed cover 603 and the fixed cylinder 602, and the air port 605 is opened on both sides of the fixed cylinder 602. One end of the air valve 601 is connected to the inside of the hollow inner cover 501, and the other end of the air valve 601 is connected to the inside of the filter screen 604.
[0025] It should be noted that when the pressure exceeds the set safety value, the air valve 601 is opened to introduce the overpressure gas into the fixed cylinder 602; the air ports 605 on both sides of the fixed cylinder 602 are gas discharge channels, which can avoid excessive airflow impact during depressurization; at the same time, the filter screen 604 between the fixed cover 603 and the fixed cylinder 602 can filter impurities carried in the overpressure airflow, such as tiny particles remaining on sterilized items, condensate impurities, etc., to prevent impurities from entering the air valve 601 and causing valve core blockage or wear. The air valve 601 can be a solenoid valve, used in conjunction with a pressure sensor, for automatic depressurization. This technology is existing technology and can be controlled by a PLC control system.
[0026] Working principle: First, align the sealing cap 2 with the open end of the sterilizer cylinder 1, so that the hollow inner cover 501 is embedded inside the sterilizer cylinder 1. At this time, the side sealing ring 504 automatically fits the annular protrusion 506 inside the cylinder, and the end face sealing ring 505 abuts against the end face of the cylinder. Then, the clamping block 4 is fitted on the edge of the sealing cap 2, and the fixing bolt 3 is tightened. The sealing cap 2 is pressed and fixed by the cooperation of the bolt and the clamping block 4, completing the installation of the sealing structure. After the sterilizer is started, saturated steam with a high temperature of 121-132℃ and a high pressure of 0.12-0.2MPa is generated inside the cylinder. Some of the high-pressure steam enters the interior of the hollow inner cover 501 through the first air hole 502 in the middle of the sealing cap 2, and then flows through the second air hole 503 on the side wall of the hollow inner cover 501, so that the pressure inside and outside the side sealing ring 504 is balanced, avoiding the sealing ring. Deformation occurs due to pressure difference; simultaneously, the side seal 504 with annular protrusion 506 and the end seal 505 with bolts work together to prevent steam leakage from any gap, maintaining a stable sterilization environment inside the cylinder. If the pressure inside the cylinder exceeds the safe value due to abnormal conditions during sterilization, the gas valve 601 is used to vent the gas. The overpressure gas enters the fixed cylinder 602 through the gas valve 601, and after being filtered by the filter screen 604, it is discharged from the gas ports 605 on both sides of the fixed cylinder 602. When the pressure inside the cylinder drops to a safe range, the gas valve 601 is closed to ensure the sterilization process remains stable. After sterilization, the pressure inside the cylinder can be actively released through the gas valve 601. After the pressure drops to normal pressure, the fixing bolt 3 is loosened and the clamp 4 is removed to open the sealing cover 2, completing the entire sterilization operation process.
[0027] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.
Claims
1. A leak-tight seal for a sterilizer, characterized by: Includes a sealing cap (2) installed at one end of the sterilizer cylinder (1), a fixing bolt (3) is threaded at the edge of the sealing cap (2), a clamping block (4) is sleeved on the outside of the fixing bolt (3), and a sealing assembly and a pressure relief assembly are provided between the sealing cap (2) and the sterilizer cylinder (1); The sealing assembly includes a hollow inner cover (501), a first air hole (502), several second air holes (503), a side sealing ring (504), an end face sealing ring (505), and several annular protrusions (506). The hollow inner cover (501) is fixedly connected to the inner side of the sealing cover (2). The first air hole (502) is opened in the middle of the sealing cover (2). Several second air holes (503) are opened on the side wall of the hollow inner cover (501). The side sealing ring (504) is sleeved on the edge of the hollow inner cover (501). The end face sealing ring (505) is fixedly connected between the hollow inner cover (501) and the sealing cover (2). Several annular protrusions (506) are fixedly connected to the inner side of one end of the sterilizer cylinder (1).
2. The anti-leakage sealing structure for a sterilizer according to claim 1, characterized in that: The first vent (502) is connected to the interior of the hollow inner cover (501), and several second vents (503) are connected to the interior of the hollow inner cover (501).
3. The anti-leakage sealing structure for a sterilizer according to claim 1, characterized in that: The upper and lower edges of the side sealing ring (504) are fixedly connected to the side wall of the hollow inner cover (501).
4. The anti-leakage sealing structure for a sterilizer according to claim 1, characterized in that: The hollow inner cover (501) is located on the inner side of one end of the sterilizer cylinder (1), and the side sealing ring (504) is located on the inner side of several annular protrusions (506). The end face sealing ring (505) abuts against the surface of one end of the sterilizer cylinder (1).
5. The anti-leakage sealing structure for a sterilizer according to claim 1, characterized in that: One end of the clamping block (4) abuts against the edge of one end of the sterilizer cylinder (1), and the sealing cover (2) is fixedly installed at one end of the sterilizer cylinder (1) by the cooperation of the fixing bolt (3) and the clamping block (4).
6. The anti-leakage sealing structure for a sterilizer according to claim 1, characterized in that: The pressure relief assembly includes an air valve (601), a fixed cylinder (602), a fixed cover (603), a filter screen (604), and an air port (605). The air valve (601) is fixedly installed on one side of the sealing cover (2), the fixed cylinder (602) is fixedly installed on one end of the air valve (601), and the fixed cover (603) is fixedly installed on one end of the fixed cylinder (602).
7. The anti-leakage sealing structure for a sterilizer according to claim 6, characterized in that: The filter screen (604) is fixedly installed between the fixed cover (603) and the fixed cylinder (602), and the air port (605) is opened on both sides of the fixed cylinder (602).
8. The anti-leakage sealing structure for a sterilizer according to claim 6, characterized in that: One end of the air valve (601) is connected to the inside of the hollow inner cover (501), and the other end of the air valve (601) is connected to the inside of the filter screen (604).