Dual-adjustment magnetic pre-tightening explosion door device

Abstract

The utility model discloses a kind of double-adjusting magnetic pre-tightening explosion door devices, it is related to the technical field of boiler explosion door, including boiler pipeline and the mounting bend seat welded on boiler pipeline, mounting bend seat is connected with mounting seat, and mounting seat is connected with connecting cover;Still including gland one and gland two;Gland one is abutted with the opening edge of mounting seat, and spring is equipped between gland one and the top wall of connecting cover;Gland two is located in the outer top wall of connecting cover, and magnet magnetically attracted connection with the outer top wall of connecting cover fixed on;Gland two is screw-threaded with bolt, and bolt is through the top wall of connecting cover and the vertical rod of the top surface of gland one abutted;The magnetic attraction of gland two and magnet is acted on gland one by bolt and vertical rod, and then guarantee the stable sealing of gland one before the pressure of pressure relief passage reaches detonation threshold value.The utility model combines the elastic force of spring and the pre-tightening force of magnet bolt, so that pressure relief passage can maintain stable sealing when not reaching detonation threshold value, improve the reliability of explosion door.

Description

Technical Field

[0001] This utility model relates to the field of boiler explosion-proof door technology, and more specifically to a dual-adjustment magnetic pre-tightening explosion-proof door device. Background Technology

[0002] During operation, boiler equipment may experience fuel explosions in the furnace or flue due to fuel accumulation, ignition failure, or improper operation, leading to overpressure risks. Traditional boiler structures, if unable to release pressure quickly, may cause serious equipment damage or even personal injury. Explosion-proof doors, as pressure relief devices, have emerged to address this need.

[0003] Traditional explosion-proof doors can be classified into gravity-type, spring-type, and rupture disc-type explosion-proof doors according to their structure. Gravity-type and spring-type doors have simple structures but are susceptible to dust accumulation and corrosion, resulting in insufficient sealing and reset reliability. Rupture disc-type doors cannot be repeatedly detonated and require periodic replacement, leading to high maintenance costs. Figure 1 As shown, before the internal pressure of the coal mill reaches the explosion threshold, the traditional spring-loaded explosion-proof door will be at risk of leakage due to the gradual increase in internal pressure and the gradual decrease in pressure difference on both sides of the pressure cover.

[0004] Therefore, how to solve the problem of the incompatibility between sealing performance and sensitivity in traditional spring-loaded explosion-proof doors, so as to achieve the advantages of repeated detonation, good sealing, precise detonation and rapid detonation, is a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] In view of this, the present invention provides a dual-adjustable magnetic pre-tightening explosion-proof door device, which aims to solve the above-mentioned technical problems.

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

[0007] A dual-adjustable magnetic pre-tightening explosion-proof door device includes: a boiler pipe and a mounting elbow welded to the boiler pipe, wherein a mounting base is bolted to the mounting elbow, and a connecting cover is bolted to the mounting base; and further includes:

[0008] A pressure cap is located inside the connecting cover. The pressure cap abuts against the opening edge of the mounting base and is used to block the pressure relief channel of the boiler pipe. A spring is provided between the pressure cap and the top wall of the connecting cover.

[0009] The second pressure cover is located on the outer top wall of the connecting cover and is magnetically connected to a magnet fixed on the outer top wall of the connecting cover. The second pressure cover is threaded with a bolt, which passes through the top wall of the connecting cover and abuts against the upright on the top surface of the first pressure cover. The magnetic attraction between the second pressure cover and the magnet acts on the first pressure cover through the bolt and the upright, thereby ensuring the stable sealing of the first pressure cover before the pressure of the pressure relief channel reaches the detonation threshold.

[0010] Through the above technical solution, this utility model seals the pressure relief channel by abutting the edge of the mounting base opening with the pressure cap one. Combined with the elastic force of the spring and the pre-tightening force of the magnetic bolt, the pressure relief channel maintains a stable seal before reaching the detonation threshold, effectively preventing leakage and improving the reliability of the explosion-proof door. The pressure cap two is magnetically connected to the magnet and acts on the pressure cap one through bolts and a vertical rod. This combination of magnetic pre-tightening and mechanical adjustment allows for flexible adjustment of the pre-tightening force, ensuring the explosion-proof door only opens to relieve pressure when the pressure reaches the precise detonation threshold. This avoids untimely or premature pressure relief due to malfunctions or insensitivity, thus improving the accuracy of pressure relief while ensuring safety.

[0011] Preferably, in the above-mentioned dual-adjustable magnetic pretensioning explosion-proof door device, the magnet is detachably connected to the outer top wall of the connecting cover by screws. This detachable connection allows for easy replacement of the magnet to restore or adjust its magnetism when needed, enabling flexible adjustment of the magnetic pretensioning force according to actual usage and requirements. This enhances the maintainability and adaptability of the explosion-proof door, eliminating the need for complete device replacement due to magnet failure or weakened magnetism, effectively reducing operating costs and maintenance difficulty.

[0012] Preferably, in the above-mentioned dual-adjustable magnetic pre-tightening explosion-proof door device, the upright is fixed to the center of the top surface of the first pressure cover, and a lower sleeve is coaxially spaced on the outer side of the upright. The lower sleeve is fixed to the top surface of the first pressure cover. An upper sleeve is fitted into the connecting cover and is located outside the bolt. The top end of the upper sleeve has a pressure plate that abuts against the inner top wall of the connecting cover. The two ends of the spring are sleeved on the upper sleeve and the lower sleeve and pressed against the first pressure cover and the pressure plate. By setting up the upright, lower sleeve, and upper sleeve, and the spring being sleeved on the upper and lower sleeves and pressed against the first pressure cover and the pressure plate, the spring is subjected to more uniform and stable force during pre-tightening and explosion venting, avoiding sealing failure or abnormal explosion venting caused by spring deformation or uneven force, enhancing the structural stability and operational reliability of the entire device, and extending the service life of the equipment. The upright is fixed to the center of the top surface of the pressure plate, with lower sleeves arranged coaxially at intervals on its outer side. The upper sleeves are fitted against the connecting cover, and their top ends abut against the inner top wall of the connecting cover. This structural layout makes the preload distribution between the pressure plate and the pressure plate more reasonable under the action of the spring, improving the stability and reliability of the entire device. It also facilitates precise adjustment of the spring compression, further optimizing the preload effect.

[0013] Preferably, in the above-mentioned dual-adjustable magnetic pre-tightening explosion-proof door device, multiple evenly distributed adjusting bolts are threaded onto the top wall of the connecting cover. These adjusting bolts pass through clearance holes on the pressure cover, and their bottom ends abut against the top surface of the pressure plate. The position of the pressure plate can be finely adjusted by extending or retracting the adjusting bolts, thereby precisely controlling the spring compression. This allows for precise adjustment of the explosion-proof door's detonation threshold, making the explosion-proof door more adaptable to the stringent pressure control requirements under different working conditions. This improves the equipment's versatility and flexibility, and reduces safety risks caused by improper pressure threshold settings.

[0014] Preferably, in the above-mentioned dual-adjustable magnetic pre-tightening explosion-proof door device, the upper sleeve extends to the top of the upright and slides in engagement with the top of the upright. This sliding engagement structure allows the upright and the upper sleeve to slide relative to each other during the operation of the explosion-proof door (such as when the pressure plate is lifted during explosion venting or pressed down during reset). This better adapts to the dynamic displacement of the pressure plate, ensuring that the spring maintains a good stress state and stable elastic force output throughout the entire operation. This further enhances the stability and reliability of the explosion-proof door during operation and avoids structural damage or functional abnormalities caused by rigid interference between components.

[0015] Preferably, in the above-mentioned dual-adjustable magnetic pre-tightening explosion-proof door device, a sealing ring is embedded in the opening edge of the mounting base, and the sealing ring abuts against the pressure cap. This further enhances the sealing performance of the explosion-proof door, effectively preventing gas or liquid leakage in harsh working environments such as high pressure and corrosiveness, ensuring that the explosion-proof door maintains a good sealing state before reaching the detonation threshold, improving the safety and reliability of the explosion-proof door, and reducing safety hazards caused by leakage.

[0016] Preferably, in the above-mentioned dual-adjustable magnetic pre-tightening explosion-proof door device, both sides of the mounting base are connected to the mounting elbow and the connecting cover via flange structures. Flange connection is a high-strength, well-sealed, simple-structured connection method that is easy to install and disassemble. This connection method makes the entire device more stable, enhances the overall structural strength and reliability, and also facilitates quick replacement or repair of various components when needed, improving equipment maintenance efficiency and reducing maintenance costs.

[0017] Preferably, in the above-mentioned dual-adjustable magnetic pre-tightening explosion-proof door device, a sealing gasket is provided on the flange connection surface of the mounting base and the mounting elbow. This further enhances the sealing effect at the connection, prevents leakage problems caused by poor sealing at the connection, ensures that the explosion-proof door can always maintain a good sealing state during operation, and improves the safety and reliability of the explosion-proof door. The importance of this sealing measure is even more prominent in situations involving high temperature, high pressure, or harmful media.

[0018] Preferably, in the above-mentioned dual-adjustable magnetic pre-tightening explosion-proof door device, the outer top wall of the connecting cover is fixedly connected to a shell by screws, and the shell covers the second pressure cover inside it. The shell, which is fixedly connected to the outer top wall of the connecting cover by screws, provides additional physical protection for the second pressure cover, preventing it from being interfered with or damaged by external environmental factors (such as dust, debris, impact, etc.). At the same time, it also helps to maintain the stability of the magnetic attraction connection between the second pressure cover and the magnet, ensuring the normal operation and reliability of the explosion-proof door in various complex environments and extending the service life of the equipment.

[0019] Preferably, in the above-mentioned dual-adjustable magnetic pre-tightening explosion-proof door device, a lifting lug is fixed to the top edge of the connecting cover. The lifting lug fixed to the top edge of the connecting cover facilitates the handling and installation process, making it easy to use hoisting equipment for lifting operations. This allows for more efficient and safer handling and positioning during the installation and maintenance of the explosion-proof door, improving work efficiency, reducing labor costs and labor intensity, and also reducing the risk of equipment damage due to improper handling.

[0020] As can be seen from the above technical solution, compared with the prior art, this utility model discloses a dual-adjustment magnetic pre-tightening explosion-proof door device, which has the following beneficial effects:

[0021] 1. Significantly improved sealing performance: By abutting the edge of the mounting bracket opening with the first pressure cap, and in conjunction with the sealing ring and sealing gasket, as well as the magnetic attraction of the magnet and the spring force of the second pressure cap, the explosion-proof door can maintain a stable seal when the explosion threshold is not reached, effectively preventing leakage.

[0022] 2. Enhanced sensitivity and safety: By utilizing the magnetic attraction between the magnet and the second pressure cap, combined with the elastic force of the spring and the adjustment force of the bolt, the preload and detonation threshold are optimized, enabling the explosion-proof door to open quickly to release pressure when the pipeline pressure increases sharply, thus avoiding leakage and safety risks.

[0023] 3. Improved adaptability and flexibility: The magnet is detachably connected by screws, and the adjusting bolts on the top wall of the cover can adjust the spring compression. The magnetic preload and detonation threshold can be flexibly adjusted, making the explosion-proof door suitable for different pressure conditions and enhancing its versatility and flexibility.

[0024] 4. Significantly improved pressure relief efficiency: Compared with traditional spring-type explosion-proof doors, this device can push the bolts of the first pressure cover to separate the second pressure cover from the magnet during pressure relief. The magnetic force attenuation increases the stroke of the first pressure cover, ensuring efficient pressure relief, avoiding insufficient pressure relief, and significantly improving pressure relief efficiency. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0026] Figure 1 The attached figure is a structural cross-sectional view of an existing spring-loaded explosion-proof door provided by this utility model;

[0027] Figure 2 The attached figure is a cross-sectional view of the overall structure of the dual-adjustable magnetic pre-tightening explosion-proof door device provided by this utility model;

[0028] Figure 3 The attached figure is a partial structural cross-sectional view of the dual-adjustable magnetic pre-tightening explosion-proof door device provided by this utility model;

[0029] Figure 4 The attached figure is a structural force diagram of the dual-adjustable magnetic pre-tightening explosion-proof door device provided by this utility model.

[0030] in:

[0031] 1-Boiler pipe; 2-Mounting elbow; 3-Mounting seat; 4-Connecting cover; 5-Pressure cover one; 6-Pressure cover two; 7-Spring; 8-Magnet; 9-Bolt; 10-Upright pole; 11-Lower sleeve; 12-Upper sleeve; 13-Pressure plate; 14-Adjusting bolt; 15-Allowing hole; 16-Sealing ring; 17-Sealing gasket; 18-Cover; 19-Lifting lug; 20-Pressure cover. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0033] See appendix Figure 2 To be continued Figure 3 This utility model discloses a dual-adjustable magnetic pre-tightening explosion-proof door device, including: a boiler pipe 1 and a mounting elbow 2 welded to the boiler pipe 1, a mounting seat 3 fastened to the mounting elbow 2 by bolts, and a connecting cover 4 fastened to the mounting seat 3 by bolts; it also includes:

[0034] Pressure cap 5 is located inside the connecting cover 4. Pressure cap 5 abuts against the opening edge of the mounting base 3 and is used to block the pressure relief channel of the boiler pipe 1. A spring 7 is provided between pressure cap 5 and the top wall of the connecting cover 4.

[0035] Pressure cap 2 6 is located on the outer top wall of connecting cover 4 and is magnetically connected to magnet 8 fixed on the outer top wall of connecting cover 4; pressure cap 2 6 is threaded with bolt 9, which passes through the top wall of connecting cover 4 and abuts against the upright 10 on the top surface of pressure cap 1 5; the magnetic attraction between pressure cap 2 6 and magnet 8 is applied to pressure cap 1 5 through bolt 9 and upright 10, thereby ensuring the stable sealing of pressure cap 1 5 before the pressure of the pressure relief channel reaches the detonation threshold.

[0036] To further optimize the above technical solution, the magnet 8 is detachably connected to the outer top wall of the connecting cover 4 by screws.

[0037] To further optimize the above technical solution, the upright 10 is fixed to the center of the top surface of the pressure cover 5. The lower sleeve 11 is arranged coaxially on the outside of the upright 10 and fixed to the top surface of the pressure cover 5. The upper sleeve 12 is attached to the connecting cover 4 and is located on the outside of the bolt 9. The top end of the upper sleeve 12 has a pressure plate 13 that abuts against the inner top wall of the connecting cover 4. The two ends of the spring 7 are sleeved on the upper sleeve 12 and the lower sleeve 11 and are pressed between the pressure cover 5 and the pressure plate 13.

[0038] To further optimize the above technical solution, multiple evenly distributed adjusting bolts 14 are threaded onto the top wall of the connecting cover 4. The adjusting bolts 14 pass through the clearance holes 15 opened on the pressure cover 6, and the bottom end of the adjusting bolts 14 abuts against the top surface of the pressure plate 13. The adjusting bolts 14 are used to adjust the pressure plate 13, thereby adjusting the elastic force of the spring 7.

[0039] To further optimize the above technical solution, the upper sleeve 12 extends to the top of the upright 10 and slides with the top of the upright 10.

[0040] To further optimize the above technical solution, a sealing ring 16 is embedded in the opening edge of the mounting base 3, and the sealing ring 16 abuts against the pressure cap 5.

[0041] To further optimize the above technical solution, both sides of the mounting base 3 are connected to the mounting elbow 2 and the connecting cover 4 through flange structures.

[0042] To further optimize the above technical solution, a sealing gasket 17 is provided on the flange connection surface between the mounting base 3 and the mounting elbow 2.

[0043] To further optimize the above technical solution, the outer top wall of the connecting cover 4 is fixedly connected to the cover 18 by screws, and the cover 18 covers the pressure cover 6 inside it.

[0044] To further optimize the above technical solution, a lifting lug 19 is fixed to the top edge of the connecting cover 4.

[0045] The second pressure cover 6, connected by a threaded bolt 9, converts the attraction of the magnet 8 on the second pressure cover 6 into the pressure of the bolt 9 on the first pressure cover 5, achieving a sealing and pre-tightening effect. In normal operation, the dual-adjustable magnetic pre-tightening explosion-proof door provided in this embodiment maintains a seal through the combined force of its own weight, spring force, and the magnetic force of the powerful magnet transmitted through the bolt. Figure 4 As shown. The dual-adjustable magnetic pre-tightening explosion-proof door releases explosion by pressing up the pressure cover 5 during explosion venting.

[0046] Compared to Figure 1Traditional spring-loaded explosion-proof doors cannot adjust the detonation threshold. The dual-adjustable magnetic pre-tightening explosion-proof door provided in this embodiment allows adjustment of the detonation threshold by adjusting the compression of spring 7 and the number of magnets 8. Furthermore, before the internal pressure of the coal mill reaches the detonation threshold, traditional spring-loaded explosion-proof doors are at risk of leakage due to the gradually increasing pressure and decreasing pressure difference across the pressure plate. The dual-adjustable magnetic pre-tightening explosion-proof door, however, incorporates a magnetic pre-tightening structure. Utilizing the characteristics of magnet 8, the distance between magnet 8 and pressure plate 6 remains unchanged until the pipeline pressure reaches the detonation threshold, thus ensuring that the dual-adjustable magnetic pre-tightening explosion-proof door does not leak when the internal pressure of the coal mill increases. In short, the dual-adjustable magnetic pre-tightening explosion-proof door balances sealing and sensitivity.

[0047] When an explosion occurs inside the coal mill, the internal pressure of the pipeline increases rapidly. Once the explosion-proof door's threshold is exceeded, the door opens to release pressure. With traditional spring-type explosion-proof doors, the spring pressure increases as the door opens, reducing the pressure difference across the pressure plate and decreasing the pressure plate's stroke. This results in low pressure release efficiency and insufficient pressure relief. However, the dual-adjustable magnetic pre-tightening explosion-proof door provided in this embodiment opens to release pressure after the pipeline pressure reaches the detonation threshold. Pressure plate 5 pushes bolt 9, separating pressure plate 6 (threaded to bolt 9) from magnet 8. The attraction of magnet 8 to pressure plate 6 rapidly decreases. This decreased magnetic force is much greater than the additional pressure generated by the compression of spring 7. At this point, the pressure difference across pressure plate 5 increases, and the stroke of pressure plate 5 increases. The dual-adjustable magnetic pre-tightening explosion-proof door efficiently releases pressure until the internal pipeline pressure is lower than the pressure of spring 7. The pressure release threshold is the difference between the detonation threshold and the magnetic force of magnet 8. If the pressure is below the detonation threshold, sufficient pressure relief is achieved.

[0048] This embodiment, through structural optimization, fundamentally solves the problem that the original spring-type explosion-proof door could not simultaneously achieve both sealing and sensitivity, thereby ensuring that the pressure plate remains in an effective sealing state for a long time. It is of great significance for solving the current problems of poor sealing, poor sensitivity, high cost of regular replacement, and difficulty in inspection and maintenance of boiler explosion-proof doors, and has broad application prospects.

[0049] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since it corresponds to the method disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0050] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A dual-adjustable magnetic pre-tightening explosion-proof door device, comprising: A boiler pipe (1) and a mounting elbow (2) welded to the boiler pipe (1), wherein a mounting seat (3) is fastened to the mounting elbow (2) by bolts, and a connecting cover (4) is fastened to the mounting seat (3) by bolts; characterized in that it further includes: Pressure cap one (5), the pressure cap one (5) is located inside the connecting cover (4), the pressure cap one (5) abuts against the opening edge of the mounting base (3) to block the pressure relief channel of the boiler pipe (1), and a spring (7) is provided between the pressure cap one (5) and the top wall of the connecting cover (4); The second pressure cover (6) is located on the outer top wall of the connecting cover (4) and is magnetically connected to the magnet (8) fixed on the outer top wall of the connecting cover (4). The second pressure cover (6) is threaded with a bolt (9), which passes through the top wall of the connecting cover (4) and abuts against the upright (10) on the top surface of the first pressure cover (5). The magnetic attraction between the second pressure cover (6) and the magnet (8) is applied to the first pressure cover (5) through the bolt (9) and the upright (10), thereby ensuring the stable sealing of the first pressure cover (5) before the pressure of the pressure relief channel reaches the detonation threshold.

2. The dual-adjustable magnetic pre-tightening explosion-proof door device according to claim 1, characterized in that, The magnet (8) is detachably connected to the outer top wall of the connecting cover (4) by screws.

3. The dual-adjustable magnetic pre-tightening explosion-proof door device according to claim 1, characterized in that, The upright (10) is fixed to the center of the top surface of the first pressure cover (5). The lower sleeve (11) is arranged coaxially on the outside of the upright (10). The lower sleeve (11) is fixed to the top surface of the first pressure cover (5). The upper sleeve (12) is attached to the connecting cover (4). The upper sleeve (12) is located on the outside of the bolt (9). The top end of the upper sleeve (12) has a pressure plate (13) that abuts against the inner top wall of the connecting cover (4). The two ends of the spring (7) are sleeved on the upper sleeve (12) and the lower sleeve (11) and pressed between the first pressure cover (5) and the pressure plate (13).

4. The dual-adjustable magnetic pre-tightening explosion-proof door device according to claim 3, characterized in that, The top wall of the connecting cover (4) is threaded with multiple evenly distributed adjusting bolts (14). The adjusting bolts (14) pass through the clearance holes (15) opened on the second pressure cover (6), and the bottom end of the adjusting bolts (14) abuts against the top surface of the pressure plate (13).

5. The dual-adjustable magnetic pre-tightening explosion-proof door device according to claim 3, characterized in that, The upper sleeve (12) extends to the top of the upright (10) and slides in cooperation with the top of the upright (10).

6. The dual-adjustable magnetic pre-tightening explosion-proof door device according to claim 1, characterized in that, The mounting base (3) has a sealing ring (16) embedded in the opening edge, and the sealing ring (16) abuts against the pressure cap (5).

7. The dual-adjustable magnetic pre-tightening explosion-proof door device according to claim 1, characterized in that, Both sides of the mounting base (3) are connected to the mounting elbow (2) and the connecting cover (4) via flange structures.

8. The dual-adjustable magnetic pre-tightening explosion-proof door device according to claim 7, characterized in that, A sealing gasket (17) is provided on the flange connection surface between the mounting base (3) and the mounting elbow (2).

9. The dual-adjustable magnetic pre-tightening explosion-proof door device according to claim 1, characterized in that, The outer top wall of the connecting cover (4) is fixedly connected to the cover (18) by screws, and the cover (18) covers the pressure cover (6) inside it.

10. A dual-adjustable magnetic pre-tightening explosion-proof door device according to claim 1, characterized in that, The top edge of the connecting cover (4) is fixed with a lifting lug (19).

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