Closed series connection wind path pressure regulation protection device

Abstract

The utility model relates to a closed series connection wind path pressure regulating protection device. The closed series connection air path pressure regulating protection device comprises a hard air duct, a sealing valve, a hinge, a spring, a support and a buckle. The sealing valve is mounted at the top of the hard air duct through a hinge, so that the sealing valve rotates around the hinge at a fixed point; the support is installed on one side of the top of the hard air duct, the two ends of the spring are connected with the support and the buckle respectively, and the buckle is installed on the sealing valve. According to the scheme, airflow connection and disconnection between the hard air duct and the external environment can be achieved through the sealing valve and the spring, the sealing valve is automatically opened and balances internal air pressure of the hard air duct when negative pressure is formed in the blocking section of the hard air duct through the spring and the hinge, and after the air pressure of an air path returns to normal, the sealing valve is closed through the elastic force of the spring and the air flow pressure; automatic wind pressure adjustment is achieved, and the safety performance of an underground mining ventilation system is improved.

Description

Technical Field

[0001] The present application relates to the technical field of series air duct protection, and in particular to a closed series air duct voltage regulating protection device. Background Art

[0002] During underground mining, during the mine infrastructure construction period and the implementation of deep well exploration pit projects, long-distance dead-end tunnels are usually excavated, and the local ventilation effect is closely related to the efficiency of the project construction. Due to the long ventilation lines, a single local ventilator cannot overcome the ventilation resistance of the long return air line. Usually, two or more local ventilators are used in closed series for ventilation to improve local ventilation efficiency.

[0003] Closed series ventilation is widely used due to its small air leakage. However, when the middle section of the closed series ventilation is blocked, after the fan has been operating normally for a period of time, negative pressure will be formed in the blocked section and the fan will idle. In the worst case, it will cause the fan motor to burn out, and in the worst case, it will cause a mine fire, with extremely serious consequences. Summary of the invention

[0004] The present application provides a closed series air duct pressure regulating protection device, which aims to solve the problem of negative pressure formed in the blocked section when the closed series ventilation duct is blocked.

[0005] The present application provides a closed series air path pressure regulating protection device, comprising:

[0006] Rigid air cylinder, sealing valve, hinge, spring, bracket and buckle;

[0007] The sealing valve is installed on the top of the hard air cylinder through a hinge, so that the sealing valve can rotate around the hinge at a fixed point;

[0008] The bracket is installed on one side of the top of the hard air cylinder, and the two ends of the spring are respectively connected to the bracket and the ring buckle, and the ring buckle is installed on the sealing valve;

[0009] When the air path is blocked and negative pressure is generated in the rigid air duct, the sealing valve is pushed downward by the air pressure difference, so that the wind pressure inside and outside the rigid air duct is balanced. After the air path returns to normal, the sealing valve is pulled back and closed by the spring tension and airflow pressure.

[0010] Optionally, in some embodiments, one end of the hinge is installed at the opening of the rigid air duct, and the other end is connected to the sealing valve. The opening and closing angle of the hinge is less than or equal to 20°, ensuring that when the air path is blocked, the sealing valve can be opened and closed quickly, and the gas outside the rigid air duct enters the interior to control the wind pressure balance.

[0011] Optionally, in some embodiments, a rubber gasket is installed around the sealing valve to ensure that the sealing valve fits against the inner wall of the hard air duct when closed, thereby reducing air leakage.

[0012] Optionally, in some embodiments, the strength and quality of the sealing valve satisfy the condition that it is not easily deformed under wind pressure.

[0013] Optionally, in some embodiments, the elastic force of the spring needs to meet the requirement that when the rigid air duct is under negative pressure, the sealing valve can be pulled open by the air pressure difference, and when the air pressure in the air path is restored, the spring tension can pull back to close the sealing valve.

[0014] The technical solution provided by this application may have the following beneficial effects:

[0015] The sealing valve and spring are used to cut off the air flow between the hard air duct and the external environment. The spring and hinge are used to automatically open the sealing valve when negative pressure is formed in the blocked section of the hard air duct, thereby balancing the internal air pressure of the hard air duct. After the air pressure in the air path returns to normal, the spring elastic force and airflow pressure are used to close the sealing valve, thereby realizing an automatic air pressure adjustment mechanism, improving the safety performance of underground mining ventilation systems, and avoiding idling of the fan, which may cause motor burnout or cause mine fires.

[0016] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and other objects, features and advantages of the present application will become more apparent through a more detailed description of exemplary embodiments of the present application in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments of the present application.

[0018] Figure 1 It is a structural schematic diagram of a closed series air duct pressure regulating protection device shown in an embodiment of the present application;

[0019] Figure 2 It is a schematic diagram of hinge installation of a closed series air duct pressure regulating protection device shown in an embodiment of the present application;

[0020] Figure 3 It is a left schematic diagram of a closed series air duct pressure regulating protection device shown in an embodiment of the present application;

[0021] Figure 4 It is a top view schematic diagram of a closed series air duct pressure regulating protection device shown in an embodiment of the present application.

[0022] Figure numerals: 1-ventilator; 2-hard air cylinder; 3-hinge; 4-sealing valve; 5-bracket; 6-spring; 7-ring; 8-rubber gasket; 9-airflow direction. DETAILED DESCRIPTION

[0023] The embodiments of the present application will be described in more detail below with reference to the accompanying drawings. Although the embodiments of the present application are shown in the accompanying drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to make the present application more thorough and complete, and to fully convey the scope of the present application to those skilled in the art.

[0024] It should be understood that although the terms "first", "second", "third", etc. may be used in this application to describe various information, this information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of this application, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0025] In the description of the present application, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0026] Unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0027] Closed series ventilation is widely used due to its small air leakage. However, when the middle section of the closed series ventilation is blocked, after the fan has been operating normally for a period of time, negative pressure will be formed in the blocked section and the fan will idle. In the worst case, it will cause the fan motor to burn out, and in the worst case, it will cause a mine fire, with extremely serious consequences.

[0028] In response to the above problems, the embodiment of the present application provides a closed series air duct pressure regulating protection device, which can achieve airflow interruption between the hard air duct and the external environment through a sealing valve and a spring, and utilizes a spring and a hinge to realize automatic opening of the sealing valve when negative pressure is formed in the blocked section of the hard air duct, thereby balancing the internal air pressure of the hard air duct. After the air pressure in the air duct returns to normal, the spring elastic force and wind flow pressure are used to close the sealing valve, thereby realizing an automatic air pressure adjustment mechanism, improving the safety performance of underground mining ventilation systems, and avoiding idling of the fan, which may cause motor burnout or cause mine fires.

[0029] The technical solution of the embodiments of the present application is described in detail below with reference to the accompanying drawings.

[0030] Figure 1 It is a structural schematic diagram of a closed series air duct pressure regulating protection device shown in an embodiment of the present application.

[0031] See also Figure 1 , a closed series air path pressure regulating protection device, comprising:

[0032] Fan 1, hard air cylinder 2, hinge 3, sealing valve 4, spring 6, bracket 5, ring buckle 7 and rubber gasket 8;

[0033] The sealing valve 4 is hinged to the top of the rigid air duct 2 through the hinge 3, so that the sealing valve 4 has the ability to rotate around the hinge 3 at a fixed point; when the sealing valve 4 is closed, it fits the inner wall of the rigid air duct 2. The sealing valve 4 itself has a certain strength and quality, and will not deform under the action of wind pressure. The size of the sealing valve 4 is determined according to demand. The rubber gasket 8 is installed around the sealing valve 4 to ensure that the sealing valve 4 is tightly fitted with the inner wall of the rigid air duct 2 when it is closed, reducing air leakage, ensuring the smooth ventilation line, and improving the inherent safety of the ventilation system. One side of the hinge 3 is welded to the opening of the rigid air duct 2, and the other side is welded to the end of the sealing valve 4. Because underground mines cannot avoid water and humid air, the hinge 3 is made of anti-corrosion material as much as possible, and the opening and closing angle of the hinge 3 is not greater than 20° to ensure that it can be opened and closed quickly when the air path is blocked.

[0034] The bracket 5 is welded to the outside of the rigid air duct 2 and is used to connect one end of the spring 6. The bracket 5 should be made of a material with high hardness to avoid deformation and bending during transportation and installation. The two ends of the spring 6 are respectively connected to the bracket 5 and the ring buckle 7 of the sealing valve 4. When the air path is blocked and negative pressure is generated in the rigid air duct 2, the sealing valve 4 is opened by the air pressure difference inside and outside the rigid air duct 2 to balance the wind pressure inside and outside the rigid air duct 2. When the air path returns to normal, the sealing valve 4 is closed by the tension of the spring 6 and the wind flow pressure. The elastic force of the spring 6 is determined according to demand. When the negative pressure of the rigid air duct 2 needs to be met, the sealing valve 4 can be pushed open by the air pressure difference. When the air path is restored, the tension of the spring 6 can pull the sealing valve 4 back to keep it closed.

[0035] The embodiments of the present application have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements to the technology in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. A closed series air duct pressure regulating protection device, characterized in that: include: A hard air cylinder (2), a hinge (3), a sealing valve (4), a spring (6), a bracket (5) and a buckle (7); The sealing valve (4) is installed on the top of the hard air cylinder (2) through the hinge (3), so that the sealing valve (4) can rotate around the hinge (3) at a fixed point; The bracket (5) is installed on one side of the top of the hard air cylinder (2), and the two ends of the spring (6) are respectively connected to the bracket (5) and the ring buckle (7), and the ring buckle (7) is installed on the sealing valve (4); When the air passage is blocked and negative pressure is generated in the rigid air duct (2), the sealing valve (4) is pushed downward by the air pressure difference, so that the air pressure inside and outside the rigid air duct (2) is balanced. After the air passage returns to normal, the sealing valve (4) is pulled back and closed by the tension of the spring (6) and the air flow pressure.

2. The closed series air duct pressure regulating protection device according to claim 1 is characterized in that: One end of the hinge (3) is installed at the opening of the rigid air duct (2), and the other end is connected to the sealing valve (4). The opening and closing angle of the hinge (3) is less than or equal to 20 degrees, so that when the air path is blocked, the sealing valve (4) can be opened and closed quickly, and the air outside the rigid air duct (2) enters the interior to control the wind pressure balance.

3. The closed series air duct pressure regulating protection device according to claim 1 is characterized in that: The sealing valve (4) is provided with a rubber gasket (8) around it, which is used to ensure that the sealing valve (4) fits closely with the inner wall of the hard air cylinder (2) when it is closed, thereby reducing air leakage.

4. The closed series air duct pressure regulating protection device according to claim 1 is characterized in that: The strength and quality of the sealing valve (4) meet the condition that it is not easily deformed under the action of wind pressure.

5. The closed series air duct pressure regulating protection device according to claim 1 is characterized in that: The elastic force of the spring (6) needs to satisfy the requirement that when the hard air duct (2) is under negative pressure, the sealing valve (4) can be pulled open by the air pressure difference, and when the air pressure in the air path is restored, the tension of the spring (6) can pull back to close the sealing valve (4).

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