Adjustable outwards-popping type explosion door applied to multiple environments

Abstract

The utility model discloses a multi-environment application adjustable outward-popping type explosion door which comprises an explosion door body structure, a pressure monitoring component, a pressure oil system and an explosion-proof automatic control system, wherein the pressure monitoring component, the pressure oil system and the explosion-proof automatic control system are arranged on the explosion door body structure. The pressure monitoring part is used for monitoring the positive / negative pressure real-time condition in the flue environment; the pressure oil system is used for quickly opening and closing the explosion-proof door and providing hydraulic oil for a hydraulic mechanism of the explosion-proof door; and the explosion-proof automatic control system is used for receiving pressure value real-time feedback of the pressure monitoring component according to abnormal fluctuation change of the pressure in the flue, judging and analyzing the pressure value real-time feedback, and then sending an opening or closing instruction to the explosion-proof door. The device has the advantages of safety, firmness, low risk, low misoperation probability and the like.

Description

Technical Field

[0001] This utility model relates to an explosion-proof door, specifically an adjustable externally spring-loaded explosion-proof door suitable for multiple environments. Background Technology

[0002] Currently, coal-fired power plants are equipped with a large number of explosion-proof doors in their flue gas ducts and furnaces. This is mainly to prevent the boiler or flue gas duct from experiencing an internal explosion when the boiler system is in an accident state and the positive / negative pressure increases too quickly.

[0003] The newly added explosion-proof doors are mainly divided into two categories: diaphragm explosion-proof doors, which are mainly added to the furnace or flue gas ducts near the furnace. They utilize the pressure sensitivity of the diaphragm, and when the pressure exceeds the limit of the diaphragm, the diaphragm ruptures, thus playing a role in explosion prevention; and spring-loaded explosion-proof doors, which are mostly used in negative pressure environments. They use a spring to set a fixed value, and when the environmental value exceeds the spring limit, the explosion-proof door opens, thus playing a role in pressure relief and explosion prevention.

[0004] Both existing types of explosion-proof doors have certain drawbacks. Diaphragm-type explosion-proof doors are disposable, and once the environment is under positive pressure, they are difficult to repair or replace. Even under negative pressure, replacing diaphragm-type explosion-proof doors poses certain safety risks. Spring-type explosion-proof doors often experience spring setpoint deviations with age, and spring corrosion can also cause the door to accidentally spring back, leading to unauthorized unit shutdowns. Utility Model Content

[0005] The purpose of this invention is to provide an adjustable, spring-loaded explosion-proof door suitable for multiple environments. This door is usable for both positive and negative pressure environments. Through pressure sensors and a hydraulic system, in negative pressure environments, the door is compressed by the negative pressure itself, and a seal prevents leakage. In slightly positive pressure environments, leakage is prevented by its own weight and the sealing mechanism. In high positive pressure environments, the hydraulic system is used for auxiliary sealing. This invention can be applied to boiler flue gas, air ducts, and furnaces. Compared with existing technologies, it has advantages such as safety, reliability, low risk, and low probability of misoperation.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An adjustable spring-loaded explosion-proof door for multiple environmental applications includes: an explosion-proof door body structure, and a pressure monitoring component, a pressure oil system, and an explosion-proof automatic control system installed on the explosion-proof door body structure.

[0008] Pressure monitoring components are used to monitor the real-time positive / negative pressure in the flue environment;

[0009] The hydraulic pressure system is used for the rapid opening and closing of explosion-proof doors, providing hydraulic oil to the hydraulic mechanism that operates the explosion-proof doors;

[0010] The explosion-proof automatic control system is used to detect abnormal pressure fluctuations in the flue. It receives real-time feedback of pressure values ​​from pressure monitoring components, analyzes the data, and issues commands to open or close the explosion-proof door.

[0011] A further improvement of this utility model is that the explosion-proof door body structure includes a servo piston cylinder, a connecting hinge rod, a door leaf, and a door seat;

[0012] The piston cylinder is driven by hydraulic oil. The servo valve is used to introduce hydraulic oil into different cylinder bodies of the piston cylinder to realize the extension and retraction of the piston and the linkage of the hinge rod, thereby controlling the movement of the door leaf.

[0013] The two ends of the connecting hinge are connected to the piston and the door leaf, respectively;

[0014] The door leaf is a semi-circular fan-shaped door panel installed on the door seat. It is connected to the door seat by a hinge at the rear end of the door leaf and its movement is controlled by a connecting hinge rod and a piston cylinder. The contact surface between the door leaf and the door seat is an arc-shaped structure.

[0015] The door seat is the connecting component between the explosion-proof door and the smoke and air duct. The door seat and the smoke and air duct are connected by welding, and the door leaf is installed on the door seat.

[0016] A further improvement of this utility model is that the two ends of the connecting hinge rod are respectively connected to the piston and the door leaf through a hinge structure.

[0017] A further improvement of this invention is that the pressure monitoring component uses a pressure transmitter and is able to upload pressure signals to the DCS system.

[0018] A further improvement of this invention lies in the fact that the range P of the pressure transmitter... L To satisfy: Under positive pressure: P L，max >1.2×P j P L,min =0; Under negative pressure: P L，min <1.2×P j P L，max =0.

[0019] A further improvement of this invention is that each explosion-proof protection location is monitored by three pressure transmitters, and a 2-out-of-3 selection is adopted in the DCS system. That is, when two of the three pressure transmitters used for pressure monitoring at the protection point reach the action value, the explosion-proof door adopts the protection strategy.

[0020] A further improvement of this invention is that the pressure oil system is an oil station, which uses a single hydraulic vane pump with an oil storage tank. The pressure oil medium is hydraulic oil, and the output pressure of the hydraulic oil station is 5.5~7 MPa, which is used to provide a hydraulic power source for the piston cylinder in the explosion-proof door body structure.

[0021] A further improvement of this invention is that the volume of the oil storage tank is at least 500L.

[0022] A further improvement of this invention is that the explosion-proof automatic control system is equipped with multiple pressure sensors in the flue, and through a series of logical judgment conditions set for the pressure monitoring points in the DCS system, the explosion-proof door is automatically opened under accident conditions, and the explosion-proof door is reset according to the real-time status of the system.

[0023] A further improvement of this utility model is that when the installed flue has a square cross-section, a pressure sensor is installed at the center of each face of the square cross-section; when the installed flue has a circular cross-section, a pressure sensor is installed at each 120° angle on the circular cross-section, and the signal is transmitted to the explosion-proof automatic control system.

[0024] Compared with the prior art, the present invention has at least the following beneficial technical effects:

[0025] This utility model provides an adjustable, outward-opening explosion-proof door suitable for multiple environments. By analyzing the shortcomings of existing explosion-proof doors used in coal-fired power plant units, improvements are made to the existing doors. Through structural design, a novel outward-opening explosion-proof door with a hydraulic structure is proposed, which can be used in both positive and negative pressure environments. By combining pressure monitoring, a hydraulic oil system, and a matching control configuration, the explosion-proof door can be automatically activated based on pressure monitoring and opened / closed according to pressure adjustments, thus achieving adjustable characteristics.

[0026] In summary, this utility model can be applied to boiler flue gas, air ducts and furnace. Compared with the existing technology, it has the advantages of being safe and reliable, low risk and low probability of misoperation. It is suitable for large-scale promotion and application in various types of thermal power units across the country and has a very broad market application prospect. Attached Figure Description

[0027] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the explosion-proof door body structure.

[0029] Figure 2(a) and (b) are schematic diagrams of the opening and closing of the explosion-proof door, where L is the piston extension amount in the initial opening state of the explosion-proof door, and α is the initial door leaf angle; L1 is the piston extension amount after the explosion-proof door is further opened, and α1 is a schematic diagram of the further opened door leaf angle.

[0030] Figure 3 This is a framework diagram of the content composition of this utility model.

[0031] Figure 4 This is the control flowchart of this utility model.

[0032] In the attached image:

[0033] 1. Servo piston cylinder, 2. Connecting hinge rod, 3. Door leaf, 4. Door seat. Detailed Implementation

[0034] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of this invention. Therefore, the drawings and description are considered exemplary in nature and not restrictive.

[0035] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0036] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0037] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0038] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0039] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0040] It should also be further understood that the term "and / or" as used in this specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0041] The accompanying drawings show various structural schematic diagrams according to embodiments of the present invention. These drawings are not to scale, and some details have been enlarged and may have been omitted for clarity. The shapes of the various regions and layers shown in the drawings, as well as their relative sizes and positional relationships, are merely exemplary and may deviate from reality due to manufacturing tolerances or technical limitations. Furthermore, those skilled in the art can design regions / layers with different shapes, sizes, and relative positions as needed.

[0042] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0043] Example 1

[0044] like Figures 1 to 4As shown, this utility model provides an adjustable spring-loaded explosion-proof door for multiple environments, including: an explosion-proof door body structure, a pressure monitoring component, a pressure oil system, and an explosion-proof automatic control system.

[0045] The explosion-proof door body structure mainly consists of four parts: servo piston cylinder 1, connecting hinge rod 2, door leaf 3, and door seat 4.

[0046] Piston cylinder 1 is mainly driven by hydraulic oil. The servo valve introduces hydraulic oil into different cylinder bodies of piston cylinder 1 to realize the extension and retraction of the piston, and to connect the hinge rod 2, thereby controlling the movement of the door leaf 3. During installation, the upper end of piston cylinder 1 should be fixed to a sturdy structure, such as an external bracket. The connecting hinge rod 2 connects the piston and the door leaf 3 respectively through the hinge structure at both ends. The door leaf 3 is a semi-circular fan-shaped door panel installed on the door seat 4. It is connected to the door seat 4 through the hinge at the tail end of the door leaf 3, and its movement is controlled by the connecting hinge rod 2 and piston cylinder 1. The contact surface between the door leaf 3 and the door seat 4 is an arc-shaped structure. The door seat 4 is the connecting component between the explosion-proof door and the smoke and air duct. The door seat 4 is welded to the smoke and air duct, and the door leaf 3 is installed on the door seat 4.

[0047] In this embodiment, the pressure monitoring component typically uses a pressure transmitter, which uploads the pressure signal to the DCS system. The pressure transmitter's range P... L To satisfy: Under positive pressure: P L，max >1.2×P j P L,min =0. Under negative pressure: P L，min <1.2×P j P L，max =0, and to ensure accurate measurement, each explosion-proof protection location should be monitored by 3 pressure transmitters, and a 2-out-of-3 selection should be performed in the DCS system, that is: the explosion-proof door will only adopt the protection strategy when two of the 3 pressure transmitters used for pressure monitoring at the protection point reach the action value.

[0048] In this embodiment, the pressure oil system is generally an oil station, which uses a single hydraulic vane pump with a 500L oil storage tank. No cooling system is required. The pressure oil medium is hydraulic oil, and the output pressure of the hydraulic oil station is about 5.5~7mPa. It is specifically designed to provide a hydraulic power source for the piston cylinder 1 in the explosion-proof door body structure.

[0049] Example 2

[0050] like Figures 1 to 3 As shown, this utility model provides an adjustable spring-loaded explosion-proof door for multiple environments, including: an explosion-proof door body structure, a pressure monitoring component, a pressure oil system, and an explosion-proof automatic control system.

[0051] like Figure 4As shown, the explosion-proof automatic control system installs multiple pressure sensors inside the flue. The main method is that when the flue has a square cross-section, a pressure sensor is installed at the center of each face of the square cross-section; when the flue has a circular cross-section, a pressure sensor is installed at every 120° angle on the circular cross-section. The signals are transmitted to the explosion-proof automatic control system. Through a series of logical judgment conditions set for the pressure monitoring points in the DCS system, the explosion-proof door is automatically opened under accident conditions, and the explosion-proof door is reset according to the real-time status of the system.

[0052] First, the normal pressure value P is generally used. u Defined as the pressure limit P of smoke and air ducts max 75%, when the pressure monitoring detects an abnormal pressure value P n (This value is defined as the design pressure value P for smoke and air ducts) max After reaching 90%, the hydraulic oil pump will be started first, and then at P n ≈P max When the explosion-proof door is opened, the initial angle α of the explosion-proof door is approximately 30°; if the hydraulic oil pump is started, P n ≈P u If so, the hydraulic pump will be shut down after a 5-minute delay.

[0053] If the pressure still exceeds the limit after the explosion-proof door is opened and the angle α is approximately 30°, continue opening until the explosion-proof door is fully open, i.e., α = 90°. After the explosion-proof door is opened, monitor the pressure value P. c ≈P u If the explosion-proof door is not open, maintain the current angle of the explosion-proof door; when the explosion-proof door is opened, monitor the pressure value P. c ≈0.5 P u If this state represents the low pressure limit, the opening of the explosion-proof door will be reduced until the explosion-proof door is closed.

[0054] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0055] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be appropriately combined to form other embodiments that can be understood by those skilled in the art. The above content is only for illustrating the technical concept of this utility model and should not be used to limit the scope of protection of this utility model. Any modifications made to the technical solutions based on the technical concept proposed by this utility model shall fall within the scope of protection of the claims of this utility model.

Claims

1. A multi-environmental adjustable spring-loaded explosion-proof door, characterized in that, include: The explosion-proof door body structure, as well as the pressure monitoring components, pressure oil system and explosion-proof automatic control system installed on the explosion-proof door body structure; Pressure monitoring components are used to monitor the real-time positive / negative pressure in the flue environment; The hydraulic pressure system is used for the rapid opening and closing of explosion-proof doors, providing hydraulic oil to the hydraulic mechanism that operates the explosion-proof doors; The explosion-proof automatic control system is used to detect abnormal pressure fluctuations in the flue. It receives real-time feedback of pressure values ​​from the pressure monitoring components, analyzes the data, and issues commands to open or close the explosion-proof doors.

2. The adjustable external spring-loaded explosion-proof door for multi-environment applications according to claim 1, characterized in that, The explosion-proof door body structure includes a servo piston cylinder (1), a connecting hinge rod (2), a door leaf (3), and a door seat (4); The piston cylinder (1) is driven by hydraulic oil. The servo valve is used to pass hydraulic oil into different cylinder bodies of the piston cylinder (1) to realize the extension and retraction of the piston and the linkage connecting rod (2), thereby controlling the movement of the door leaf (3). The two ends of the connecting hinge (2) are respectively connected to the piston and the door leaf (3); The door leaf (3) is a semi-circular fan-shaped door panel installed on the door seat (4). It is connected to the door seat (4) through the hinge at the end of the door leaf (3) and its movement is controlled by the connecting hinge rod (2) and the piston cylinder (1). The contact surface between the door leaf (3) and the door seat (4) is an arc-shaped structure. The door seat (4) is the connecting component between the explosion-proof door and the smoke and air duct. The door seat (4) is welded to the smoke and air duct, and the door leaf (3) is installed on the door seat (4).

3. The adjustable external spring-loaded explosion-proof door for multi-environment applications according to claim 2, characterized in that, The two ends of the connecting hinge rod (2) are connected to the piston and the door leaf (3) respectively through the hinge structure.

4. The adjustable external spring-loaded explosion-proof door for multi-environment applications according to claim 2, characterized in that, The pressure monitoring component uses a pressure transmitter and is capable of uploading pressure signals to the DCS system.

5. The adjustable external spring-loaded explosion-proof door for multi-environment applications according to claim 4, characterized in that, Pressure transmitter range P L To satisfy: Under positive pressure: P L，max >1.2×P j P L,min =0; Under negative pressure: P L，min <1.2×P j P L，max =0.

6. The adjustable external spring-loaded explosion-proof door for multi-environment applications according to claim 5, characterized in that, For each explosion-proof protection location, three pressure transmitters are used for monitoring, and a 2-out-of-3 selection is adopted in the DCS system. That is, when two of the three pressure transmitters used for pressure monitoring at the protection point reach the action value, the explosion-proof door adopts the protection strategy.

7. The adjustable externally ejected explosion-proof door for multi-environment applications according to claim 2, characterized in that, The pressure oil system is an oil station, which uses a single hydraulic vane pump with an oil storage tank. The pressure oil medium is hydraulic oil. The output pressure of the hydraulic oil station is 5.5~7mPa, which is used to provide hydraulic power source for the piston cylinder (1) in the explosion-proof door body structure.

8. The adjustable externally ejected explosion-proof door for multi-environment applications according to claim 7, characterized in that, The oil tank has a capacity of at least 500L.

9. The adjustable external spring-loaded explosion-proof door for multi-environment applications according to claim 2, characterized in that, The explosion-proof automatic control system is equipped with multiple pressure sensors in the flue. By setting a series of logical judgment conditions for the pressure monitoring points in the DCS system, the explosion-proof door can be automatically opened under accident conditions, and the explosion-proof door can be reset according to the real-time status of the system.

10. The adjustable externally ejected explosion-proof door for multi-environment applications according to claim 9, characterized in that, When the installed flue has a square cross-section, a pressure sensor is installed at the center of each face of the square cross-section. When the installed flue has a circular cross-section, a pressure sensor is installed at each 120° angle on the circular cross-section, and the signal is transmitted to the explosion-proof automatic control system.

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