Sealing structure of pressure relief cover

Abstract

The utility model relates to the technical field of pressure relief cover sealing, in particular to a sealing structure of a pressure relief cover, which comprises a mounting seat and an upper cover body, the mounting seat is provided with a mounting part, the upper cover body is mounted on the mounting part in a threaded fit manner, and a sealing gasket is arranged between the upper cover body and the top of the mounting part; an inner shell is arranged on the inner side of the mounting part, and a pressure relief assembly is mounted in the inner shell; a first air outlet is formed in the mounting part, and a second air outlet is formed in the inner shell; an installation cylinder part is arranged between the installation part and the first air outlet, a pressure relief cavity is formed in the position, on the inner side of the installation cylinder part, of the bottom of the inner shell, a sealing groove is formed in the outer side wall of the pressure relief cavity, and a sealing ring matched with the side wall of the installation cylinder part for sealing is installed in the sealing groove. By introducing multiple sealing mechanisms, the air flow path is optimized, the space utilization rate is improved, and the sealing reliability and the stability of the whole structure are remarkably enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of pressure relief cover sealing, and particularly relates to a sealing structure of a pressure relief cover. Background Art

[0002] The information disclosed in the background art of the utility model is only intended to increase the understanding of the overall background of the utility model, and is not necessarily regarded as an admission or an implication in any form that this information constitutes the prior art already known to those of ordinary skill in the art.

[0003] As one of the key safety components of a pressure vessel, the pressure relief cover is widely used in industries such as automobiles, chemicals, pharmaceuticals, food processing, and energy production.

[0004] Traditional pressure relief covers usually have positive pressure and negative pressure opening functions, and their sealing mainly depends on the flat gasket at the end face. However, most traditional designs have the limitation of single sealing. Only relying on the end face flat gasket for sealing, if the upper cover body is not fully tightened or the tightening torque does not reach the standard during operation, it is easy to cause sealing failure.

[0005] In addition, after long-term use, the gasket may age or be damaged, further increasing the risk of leakage. Moreover, factors such as temperature change, chemical corrosion, and mechanical vibration can all weaken the sealing performance of the flat gasket. Especially under extreme conditions, single sealing is difficult to maintain long-term reliability.

[0006] In view of the above problems, there is an urgent need in the current market for a pressure relief cover sealing structure with better sealing performance and reliability. Summary of the Utility Model

[0007] In order to solve the above technical problems, the utility model provides a sealing structure of a pressure relief cover, aiming to improve the reliability of sealing.

[0008] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0009] A sealing structure of a pressure relief cover includes a mounting seat and an upper cover body. The mounting seat is provided with a mounting portion, and the upper cover body is threadedly fitted and installed on the mounting portion. A gasket is provided between the upper cover body and the top of the mounting portion. An inner shell is arranged inside the mounting portion, and a pressure relief assembly is installed inside the inner shell. The mounting portion is provided with a first air outlet, and the inner shell is provided with a second air outlet.

[0010] An installation cylinder portion is arranged between the mounting portion and the first air outlet. A pressure relief cavity is arranged inside the installation cylinder portion at the bottom of the inner shell. A sealing groove is arranged on the outer side wall of the pressure relief cavity, and a sealing ring that is matched and sealed with the side wall of the installation cylinder portion is installed in the sealing groove.

[0011] Preferably, a diversion cavity is provided on the lower end face of the pressure relief cavity corresponding to the first air outlet.

[0012] Preferably, the pressure relief assembly is installed in the installation body of the inner housing, and the outer diameter of the pressure relief cavity is smaller than the outer diameter of the installation body.

[0013] Preferably, the second air outlet is provided in the pressure relief cavity.

[0014] Preferably, the sealing ring is an O-ring.

[0015] Preferably, the upper cover body is provided with a pressure relief outlet pipe communicating with the pressure relief assembly.

[0016] The utility model includes but is not limited to the following beneficial effects:

[0017] By adding a diversion cavity and a pressure relief cavity, the utility model optimizes the gas flow path, makes the air flow smoother, reduces air flow disorder and turbulence, and reduces pressure loss, thereby reducing the risk of seal failure caused by irregular air flow.

[0018] Meanwhile, an O-ring is installed in the sealing groove on the outer wall of the pressure relief cavity to form a radial seal with the side wall of the installation cylinder part, providing a pre-seal before the traditional flat washer. Even if the flat washer fails, the O-ring can still maintain good sealing performance, greatly reducing the possibility of leakage.

[0019] By setting the installation cylinder part, the utility model reduces the sealing end face of the sealing ring, so that the gas is sealed at the installation cylinder part, reducing the sealing defect caused by the upper cover body not being fully tightened or the tightening torque being insufficient, and improving the reliability of the overall structure.

[0020] Through reasonable layout, such as arranging the pressure relief cavity at the lower part of the inner housing and cooperating with the space design of the installation body, the utility model makes full use of the space in the installation part, makes the whole structure more compact, and at the same time ensures good sealing performance and air flow guidance. Description of the Drawings

[0021] Figure 1 is a schematic diagram of the overall structure of the utility model;

[0022] Figure 2 is a schematic diagram of the sealing structure of a traditional pressure relief cover.

[0023] The reference numerals involved in the drawings are:

[0024] 1. Upper cover body; 11. Pressure relief outlet pipe; 2. Mounting seat; 21. Pressure vessel; 22. First air outlet; 23. Mounting cylinder part; 24. Mounting part; 3. Inner shell; 31. Pressure relief cavity; 32. Second air outlet; 33. Sealing groove; 34. Flow guiding cavity; 4. Pressure relief assembly; 5. Sealing gasket; 6. Sealing ring. Detailed implementation mode

[0025] In order to enable those skilled in the art to better understand the present utility model, the technical solution of the present utility model will be further described below in conjunction with the accompanying drawings and embodiments.

[0026] Figure 1 A sealing structure of a pressure relief cover is shown, including a mounting seat 2 and an upper cover body 1. The mounting seat 2 is arranged at the air outlet of the pressure vessel 21. The upper cover body 1 is provided with a pressure relief outlet pipe 11 communicated with the pressure relief assembly 4. The mounting seat 2 is provided with a mounting part 24. The upper cover body 1 is threadedly fitted and installed on the mounting part 24. A sealing gasket 5 is arranged between the upper cover body 1 and the top of the mounting part 24. The sealing gasket 5 is generally a flat gasket. An inner shell 3 is arranged inside the mounting part 24. A pressure relief assembly 4 is installed inside the inner shell 3. Part of the pressure relief assembly 4 can be the same as the prior art, and the improvement of this application is not here. The mounting part 24 is provided with a first air outlet 22. The inner shell 3 is provided with a second air outlet 32. The second air outlet 32 is opened in the pressure relief cavity 31.

[0027] An installation cylinder part 23 is arranged between the mounting part 24 and the first air outlet 22. A pressure relief cavity 31 is arranged inside the installation cylinder part 23 at the bottom of the inner shell 3. A sealing groove 33 is arranged on the outer side wall of the pressure relief cavity 31. A sealing ring 6 which is matched and sealed with the side wall of the installation cylinder part 23 is installed in the sealing groove 33.

[0028] In order to enable the pressure relief air flow to enter the pressure relief cavity 31 more smoothly, a flow guiding cavity 34 is opened on the lower end face of the pressure relief cavity 31 corresponding to the first air outlet 22.

[0029] The pressure relief assembly 4 is installed in the installation body of the inner shell 3. Due to providing an installation space for the pressure relief assembly 4, the outer diameter of the installation body is relatively large. And the outer diameter of the pressure relief cavity 31 is smaller than the outer diameter of the installation body. Such a setting can reduce the activity space of the air flow, which is beneficial to improving the sealing reliability. And the installation cylinder part 23 is also arranged on the lower side of the installation body, so that the space inside the mounting part 24 can be fully utilized.

[0030] The sealing structure of the traditional pressure relief cover is as Figure 2As shown, compared with the sealing structure of the traditional pressure relief cover, a pressure relief cavity 31 is added at the lower position of the inner shell 3 in this structure, which, in cooperation with the diversion cavity 34, plays a role in guiding and relieving pressure. The gas in the pressure vessel 21 first enters the pressure relief cavity 31 through the first air outlet 22 and the diversion cavity 34, and then exits through the second air outlet 32, the pressure relief assembly 4 and the pressure relief outlet pipe 11. This greatly shortens the redundant path of the pressure relief airflow, avoids airflow disorder, and thus reduces the leakage probability. At the same time, an O-ring 6 is installed in the sealing groove 33 on the outer wall of the pressure relief cavity 31, and an installation cylinder part 23 is also provided outside the first air outlet 22, reducing the sealing end face of the sealing ring 6 and improving the sealing reliability. Moreover, the sealing ring 6 and the inner wall of the installation cylinder part 23 form a radial sealing structure, enabling the gas to be sealed at the installation cylinder part 23, thereby effectively avoiding the air leakage failure caused by the upper cover body 1 not being fully tightened or the torque not meeting the standard.

[0031] In summary, through innovative designs such as introducing multiple sealing mechanisms, optimizing the airflow path, and improving space utilization rate, the pressure relief cover sealing structure of the present utility model significantly enhances the sealing reliability and the overall structural stability, providing safer and more efficient pressure relief protection for the pressure vessel.

[0032] Terms such as "upper", "lower", "outer side", "inner side", etc. in the description and claims of the present utility model and the above-mentioned drawings are used to distinguish the relative positions and do not need to be qualitatively defined if they exist. It should be understood that such used data can be interchanged under appropriate circumstances so that the embodiments of the present utility model described herein can be implemented in an order different from those illustrated or described herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion.

[0033] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present utility model. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present utility model. Therefore, the present utility model will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A sealing structure of a pressure relief cover, comprising a mounting seat and an upper cover body, wherein the mounting seat is provided with a mounting portion, the upper cover body is threadedly mounted on the mounting portion, a sealing gasket is provided between the upper cover body and the top of the mounting portion; an inner shell is provided inside the mounting portion, a pressure relief assembly is installed inside the inner shell; the mounting portion is provided with a first air outlet, and the inner shell is provided with a second air outlet; the characteristics are: A mounting cylinder is provided between the mounting portion and the first air outlet, a pressure relief chamber is provided on the inner side of the mounting cylinder at the bottom of the inner shell body, a sealing groove is provided on the outer side wall of the pressure relief chamber, and a sealing ring is installed in the sealing groove to seal with the side wall of the mounting cylinder.

2. The sealing structure of the pressure relief cover according to claim 1, characterized in that: A flow guiding cavity is formed on the lower end surface of the pressure relief cavity corresponding to the first air outlet.

3. The sealing structure of the pressure relief cover according to claim 1, characterized in that: The pressure relief assembly is installed in the installation body of the inner shell, and the outer diameter of the pressure relief cavity is smaller than the outer diameter of the installation body.

4. The sealing structure of the pressure relief cover according to claim 1, characterized in that: The second air outlet is disposed in the pressure relief chamber.

5. The sealing structure of the pressure relief cover according to claim 1, characterized in that: The sealing ring is an O-type sealing ring.

6. The sealing structure of the pressure relief cover according to any one of claims 1 to 5, characterized in that: The upper cover body is provided with a pressure relief air outlet pipe which is in communication with the pressure relief assembly.

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