A digital take-off breathing valve

Abstract

The present invention discloses a digital jump-off breathing valve, including a valve body, a first sealing cavity inside the valve body, a second sealing cavity arranged around the outside of the valve body, the first sealing cavity and the second sealing cavity are connected by a digital small valve, and the same valve cover is arranged on the top of the first sealing valve and the second sealing valve; the pressure in the first sealing cavity is greater than the set pressure of the digital small valve, the gas enters the second sealing cavity, the sealing cross section changes, and the valve cover jumps up. The present invention has a simple structure, is convenient and practical; by using the difference in the specific pressure between the first sealing cavity and the second sealing cavity, only when the inner ring first sealing cavity reaches the jump-off pressure, the gas reaches the second sealing cavity through the precise digital small valve, and the change in the cross section makes the valve cover jump easily, achieving zero leakage or very little leakage at low pressure; when the present invention is lower than the jump-off pressure, it is in a sealed state with little leakage, which has obvious economic and social benefits in reducing the cost of gas sealing and reducing tail gas emissions.

Description

Technical Field

[0001] The invention relates to the technical field of breathing valves, and in particular to a digital take-off breathing valve. Background Art

[0002] In various storage tanks in the petroleum, chemical, and metallurgical industries at home and abroad, breathing valves can protect the storage tanks from damage when overpressure or vacuum occurs, ensuring the safety of the tank body; reducing the discharge of media in the tank and reducing environmental pollution.

[0003] With the increasing professionalization and large-scale needs of chemical industry storage tanks, and the environmental protection requirements for tail gas treatment, the requirements for emission and leakage of chemical storage tanks are becoming more and more stringent. As a storage tank accessory, the breathing valve requires tight sealing and accurate emission starting point. However, it is difficult for traditional breathing valves to achieve zero leakage or very little leakage at low pressure. Summary of the invention

[0004] The purpose of the present invention is to provide a digital jump breathing valve in view of the defects and shortcomings of the prior art.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a digital jump-start breathing valve, including a valve body, and its innovation lies in: the valve body is a first sealed cavity, and a second sealed cavity is arranged around the outside of the valve body, the first sealed cavity and the second sealed cavity are connected by a digital small valve, and the same valve cover is arranged on the top of the first sealed cavity and the second sealed cavity; the pressure in the first sealed cavity is greater than the set pressure of the digital small valve, the gas enters the second sealed cavity, the sealing cross-section changes, and the valve cover jumps up.

[0006] After adopting the above structure, the beneficial effects of the present invention are:

[0007] The present invention has a simple structure and is convenient and practical. By utilizing the difference in relative pressures between the first sealing chamber and the second sealing chamber, gas can reach the second sealing chamber through a precise digital small valve only when the first sealing chamber of the inner ring reaches the starting pressure. Due to the change in the cross section, the valve cover can easily jump, thereby achieving zero leakage or very little leakage at low pressure, and the digitization of the starting pressure is achieved by changing the sealing cross section and changing the sealing relative pressure. When the pressure is lower than the starting pressure, the present invention is in a sealed state with little leakage, which reduces the gas sealing cost and reduces tail gas emissions, and has obvious economic and social benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a schematic diagram of the structure of the present invention.

[0009] Description of reference numerals:

[0010] 1 valve body, 2 first sealing chamber, 3 second sealing chamber, 4 digital small valve, 5 valve cover. DETAILED DESCRIPTION

[0011] The present invention will be further described below in conjunction with the accompanying drawings.

[0012] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be understood that the specific implementation methods described herein are only used to explain the present invention and are not used to limit the present invention.

[0013] See also Figure 1 A digital start-up breathing valve comprises a valve body 1, a first sealing chamber 2 is provided inside the valve body 1, a second sealing chamber 3 is arranged around the outside of the valve body 1, the first sealing chamber 2 and the second sealing chamber 3 are connected by a digital small valve 4, and the same valve cover 5 is arranged on the top of the first sealing chamber 2 and the second sealing chamber 3; the pressure inside the first sealing chamber 2 is greater than the set pressure of the digital small valve 4, the gas enters the second sealing chamber 3, the sealing cross section changes, and the valve cover 5 jumps up. Specifically, the present application realizes its function by using the difference between the specific pressure of the first sealing chamber 2 and the second sealing chamber 3; only when the first sealing chamber 2 in the inner circle reaches the start-up pressure, the gas reaches the second sealing chamber 3 through the precise digital small valve 4, and the valve cover 5 easily jumps up due to the change of the cross section, that is, the change of the pressure. The start-up condition of the breathing valve of the present application is: the pressure of the first sealing chamber 2 is greater than the set pressure of the digital small valve 4, the gas enters the second sealing chamber 3, the sealing cross section changes, and then the entire valve cover 5 leaves the sealing valve seat and discharges to the outside. The digitization of the start-up pressure is achieved by changing the sealing cross section and changing the sealing specific pressure.

[0014] In this embodiment, the upper end surfaces of the first sealed cavity 2 and the second sealed cavity 3 are flush, ensuring that the valve cover 5 can fully contact the upper end surfaces of the first sealed cavity 2 and the second sealed cavity 3 to avoid air leakage.

[0015] The above description is only used to illustrate the technical solution of the present invention rather than to limit it. Other modifications or equivalent substitutions made to the technical solution of the present invention by ordinary technicians in this field should be included in the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solution of the present invention.

Claims

1. A digital take-off breathing valve, comprising a valve body, characterized in that: The valve body contains a first sealed cavity, and the valve body is surrounded by a second sealed cavity. The first sealed cavity and the second sealed cavity are connected by a digital small valve, and the same valve cover is arranged on the top of the first sealed cavity and the second sealed cavity. The pressure in the first sealed cavity is greater than the set pressure of the digital small valve, and the gas enters the second sealed cavity, the sealing cross section changes, and the valve cover jumps up.

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