A gravity-type flue explosion-proof mechanism

Abstract

This utility model discloses a gravity-type explosion-proof mechanism for flues, comprising: an explosion-proof connecting seat, an explosion-proof exhaust pipe section on the top of the explosion-proof connecting seat, the upper end of the explosion-proof exhaust pipe section being open and protruding from the explosion-proof connecting seat, a sealing ring on the outer wall of the explosion-proof exhaust pipe section, a sealing groove between the sealing ring and the outer wall of the explosion-proof exhaust pipe section, a sealing filler in the sealing groove, and an explosion-proof door on the top of the explosion-proof exhaust pipe section, the structure of which includes: an explosion-proof door cover, a pressure cap section at the bottom of the explosion-proof door cover, the pressure cap section sealingly pressing against the sealing filler; when the pressure inside the explosion-proof connecting seat overcomes the weight of the explosion-proof door, the explosion-proof door can move upward, causing the pressure cap section to detach from the sealing filler and release the seal; an anti-detachment mechanism is also provided between the explosion-proof door and the explosion-proof exhaust pipe section. The advantages of this utility model are: a simple yet ingenious structure, and convenient installation, disassembly, and use.

Description

Technical Field

[0001] This utility model relates to the field of boiler technology, specifically to an explosion-proof mechanism for boiler flue gas ducts. Background Technology

[0002] The flue gas conditions within the boiler's flue are unstable, which poses a risk of increased pressure within the flue. To mitigate this risk, explosion-proof doors are typically installed in the flue. However, current explosion-proof door structures are quite complex and costly. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a gravity-type flue explosion-proof mechanism with an extremely simple structure, good explosion-proof effect, flexible opening and good safety.

[0004] To solve the above problems, the technical solution adopted by this utility model is: a gravity-type flue explosion-proof mechanism, comprising: an explosion-proof connecting seat for connecting with the flue, an explosion-proof exhaust pipe section provided on the top of the explosion-proof connecting seat, the lower end of the explosion-proof exhaust pipe section communicating with the inner cavity of the explosion-proof connecting seat, the upper end of the explosion-proof exhaust pipe section being open and protruding from the explosion-proof connecting seat, a sealing ring provided on the outer wall of the explosion-proof exhaust pipe section protruding from the explosion-proof connecting seat, forming an annular sealing groove between the sealing ring and the outer wall of the explosion-proof exhaust pipe section, a sealing filler provided in the sealing groove, and the top of the explosion-proof exhaust pipe section... The device is equipped with an explosion-proof door. The explosion-proof door structure includes: an explosion-proof door cover, and a ring of gland sections at the bottom of the explosion-proof door cover. Under the action of gravity, the gland sections seal against the sealing packing in the sealing groove. A vertical guide mechanism is also provided between the explosion-proof door and the explosion-proof exhaust cylinder section to ensure the vertical movement of the explosion-proof door. When the pressure in the explosion-proof connecting seat overcomes the weight of the explosion-proof door, the explosion-proof door can move upward, causing the gland sections to detach from the sealing packing, releasing the seal and relieving pressure. An anti-detachment mechanism is also provided between the explosion-proof door and the explosion-proof exhaust cylinder section to prevent the explosion-proof door from completely detaching from the explosion-proof exhaust cylinder section.

[0005] Furthermore, in the aforementioned gravity-type flue explosion-proof mechanism, the structure of the vertical guide mechanism includes: at least two door cover guide shafts are fixedly installed at the bottom of the explosion-proof door cover, each door cover guide shaft is inserted into a guide sleeve, and the guide sleeve is fixedly installed inside the explosion-proof cylinder section.

[0006] Furthermore, in the aforementioned gravity-type explosion-proof flue mechanism, two door cover guide shafts are provided. The two door cover guide shafts are coaxially arranged on the horizontal axis of the explosion-proof door cover and mirrored about the vertical axis of the explosion-proof door cover. The two door cover guide shafts are fixed to each other and to the explosion-proof door cover by door cover stiffeners. The arrangement of the door cover stiffeners ensures that the center of gravity of the entire explosion-proof door cover is centered.

[0007] Furthermore, in the aforementioned gravity-type flue explosion-proof mechanism, two guide sleeves are also provided, and the two guide sleeves and the inner wall of each guide sleeve are fixed together by the section stiffeners.

[0008] Furthermore, in the aforementioned gravity-type flue explosion-proof mechanism, the anti-detachment mechanism includes: at least one door cover guide shaft has a cotter pin at its lower end, and the cotter pin can be locked at the bottom of the guide sleeve.

[0009] Furthermore, in the aforementioned gravity-type flue explosion-proof mechanism, the structure of the explosion-proof connecting seat includes: an explosion-proof connecting seat pipe section, with connecting seat flanges for connecting to the flue at both ends of the explosion-proof connecting seat pipe section, and the explosion-proof exhaust pipe section is welded and fixedly sealed at the top of the explosion-proof connecting seat pipe section.

[0010] Furthermore, in the aforementioned gravity-type flue explosion-proof mechanism, the lower end of each door cover guide shaft extends through the explosion-proof exhaust pipe section into the explosion-proof connecting seat pipe section.

[0011] Furthermore, in the aforementioned gravity-type flue explosion-proof mechanism, a handle is provided on the top of the explosion-proof door cover.

[0012] Furthermore, in the aforementioned gravity-type flue explosion-proof mechanism, when the sealing cap section at the bottom of the explosion-proof door cover presses against the sealing filler in the sealing groove, the bottom of the explosion-proof door cover does not contact the top of the explosion-proof exhaust pipe section.

[0013] The advantages of this invention are: its structure is simple yet ingenious, and installation and disassembly are very convenient. If the pressure inside the flue becomes too high, the flue gas pressure overcomes the weight of the explosion-proof door, causing it to move upwards until the pressure cap section separates from the sealing packing in the sealing groove. This allows the flue gas to be quickly discharged, effectively preventing safety accidents caused by excessive pressure. After the pressure inside the flue is released, under the action of gravity, the pressure cap section presses against the sealing packing in the sealing groove again, thus re-sealing the explosion-proof door and the explosion-proof connecting seat. The entire process of pressure release and resealing is simple, reliable, and safe. Attached Figure Description

[0014] Figure 1 This is a structural schematic diagram of a gravity-type explosion-proof flue mechanism according to the present invention.

[0015] Figure 2 yes Figure 1 Schematic diagram of the explosion-proof connector.

[0016] Figure 3 yes Figure 2 A schematic diagram of the explosion-proof connection seat as viewed from above.

[0017] Figure 4 yes Figure 1 A structural diagram of a medium-sized explosion-proof door.

[0018] Figure 5 yes Figure 4 A structural diagram of an explosion-proof door viewed from below. Detailed Implementation

[0019] The present invention will now be described in further detail with reference to the accompanying drawings and preferred embodiments.

[0020] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 As shown, a gravity-type flue explosion-proof mechanism includes: an explosion-proof connecting seat 1 for connecting to the flue, and an explosion-proof exhaust pipe section 2 is provided on the top of the explosion-proof connecting seat 1. In this embodiment, the explosion-proof connecting seat 1 includes: an explosion-proof connecting seat pipe section 11, and connecting seat flanges 12 for connecting to the flue are respectively provided at both ends of the explosion-proof connecting seat pipe section 11. The explosion-proof exhaust pipe section 2 is welded and fixedly installed on the top of the explosion-proof connecting seat pipe section 11. The lower end of the explosion-proof exhaust pipe section 2 communicates with the inner cavity of the explosion-proof connecting seat 1, that is, the inner cavity of the explosion-proof connecting seat pipe section 11, and the upper end of the explosion-proof exhaust pipe section 2 is open and protrudes from the explosion-proof connecting seat 1, that is, protrudes from the explosion-proof connecting seat pipe section 11. A sealing ring 21 is provided on the outer wall of the explosion-proof exhaust pipe section 2 protruding from the explosion-proof connecting pipe section 1. An annular sealing groove 211 is formed between the sealing ring 21 and the outer wall of the explosion-proof exhaust pipe section 2. A sealing filler 212 is provided in the sealing groove 211. In this embodiment, the sealing filler 212 is made of aluminum silicate fiber cotton.

[0021] The explosion-proof exhaust stack section 2 is topped with an explosion-proof door 3. The explosion-proof door 3 includes an explosion-proof door cover 31, with a handle 311 on top. The handle 311 greatly facilitates the installation and removal of the explosion-proof door 3. A sealing sleeve 32 is located at the bottom of the explosion-proof door cover 31. Under gravity, the sealing sleeve 32 presses against the sealing filler 212 in the sealing groove 211. In this embodiment, when the sealing sleeve 32 at the bottom of the explosion-proof door cover 31 presses against the sealing filler 212 in the sealing groove 211, the bottom of the explosion-proof door cover 31 does not contact the top of the explosion-proof exhaust stack section 2, making it more convenient to release pressure when needed.

[0022] A vertical guide mechanism is also provided between the explosion-proof door 3 and the explosion-proof exhaust cylinder section 2 to ensure the vertical movement of the explosion-proof door 3. When the pressure inside the explosion-proof connecting seat 1 overcomes the weight of the explosion-proof door 3, the explosion-proof door 3 can move upward, causing the gland cylinder section 32 to detach from the sealing packing 212, releasing the seal and depressurizing. An anti-detachment mechanism is also provided between the explosion-proof door 3 and the explosion-proof exhaust cylinder section 2 to prevent the explosion-proof door 3 from completely detaching from the explosion-proof exhaust cylinder section 2.

[0023] Specifically, in this embodiment, the vertical guide mechanism includes: at least two door cover guide shafts 33 are fixedly installed at the bottom of the explosion-proof door cover 31, each door cover guide shaft 33 is inserted into a guide sleeve 22, and the guide sleeve 22 is fixedly installed inside the explosion-proof exhaust pipe section 2. In this embodiment, there are two door cover guide shafts 33, which are coaxially arranged on the horizontal axis 301 of the explosion-proof door cover 31 and mirrored about the vertical axis 302 of the explosion-proof door cover 31; door cover stiffeners 34 are connected between the two door cover guide shafts 33 and between each door cover guide shaft 33 and the explosion-proof door cover 31, and the arrangement of the door cover stiffeners 34 ensures that the center of gravity of the entire explosion-proof door cover 31 is centered. The lower end of each door cover guide shaft 33 passes through the explosion-proof exhaust pipe section 2 and extends into the explosion-proof connecting seat pipe section 11.

[0024] The door cover stiffener 34 ensures reliable connection between the door cover guide shaft 33 and the explosion-proof door cover 31, and also increases the weight of the explosion-proof door cover 31.

[0025] Correspondingly, two guide sleeves 22 are also provided, and the two guide sleeves 22 are fixed to each other and to the inner wall of the explosion-proof cylinder section 2 by cylinder section stiffeners 23.

[0026] In this embodiment, the anti-detachment mechanism includes: at least one door cover guide shaft 33 has a cotter pin 331 at its lower end. The cotter pin 331 can be locked at the bottom of the guide sleeve 22, so that when the pressure inside the explosion-proof connecting seat 1 overcomes the weight of the explosion-proof door 3, it prevents the explosion-proof door 3 from moving upward and completely detaching from the explosion-proof connecting seat 1, thereby greatly improving safety.

[0027] As can be seen from the above, this utility model provides a gravity-type explosion-proof mechanism for flues, which has a simple yet ingenious structure and is very convenient to install and disassemble. Once the pressure inside the flue is too high, the flue gas pressure overcomes the gravity of the explosion-proof door 3, causing the door 3 to move upwards until the pressure cap section 32 separates from the sealing filler 212 in the sealing groove 211. In this way, the flue gas inside the flue will be quickly discharged through the gap between the explosion-proof connecting seat section 11, the explosion-proof exhaust pipe section 2, the pressure cap section 32, and the sealing groove 211, effectively preventing safety accidents caused by excessive pressure. After the pressure inside the flue is released, under the action of gravity, the pressure cap section 32 presses against the sealing filler 212 in the sealing groove 211 again, thus re-sealing the explosion-proof door 3 and the explosion-proof connecting seat 1. The entire process of pressure release and resealing is very simple, reliable, and safe.

Claims

1. A gravity-type explosion-proof mechanism for flues, comprising: An explosion-proof connector for connection with a flue, characterized in that: an explosion-proof exhaust pipe section is provided at the top of the explosion-proof connector; the lower end of the explosion-proof exhaust pipe section communicates with the inner cavity of the explosion-proof connector; the upper end of the explosion-proof exhaust pipe section is open and protrudes from the explosion-proof connector; a sealing ring is provided on the outer wall of the explosion-proof exhaust pipe section protruding from the explosion-proof connector; an annular sealing groove is formed between the sealing ring and the outer wall of the explosion-proof exhaust pipe section; sealing filler is provided in the sealing groove; and an explosion-proof door is provided on the top of the explosion-proof exhaust pipe section, the explosion-proof door having the following structure: The explosion-proof door cover has a ring of gland sections at its bottom. Under gravity, the gland sections press against the sealing packing in the sealing groove. A vertical guide mechanism is also provided between the explosion-proof door and the explosion-proof exhaust cylinder section to guide the vertical movement of the explosion-proof door. When the pressure in the explosion-proof connecting seat overcomes the weight of the explosion-proof door, the explosion-proof door can move upward, causing the gland sections to detach from the sealing packing, releasing the seal and depressurizing. An anti-detachment mechanism is also provided between the explosion-proof door and the explosion-proof exhaust cylinder section to prevent the explosion-proof door from completely detaching from the explosion-proof exhaust cylinder section.

2. The gravity-type flue explosion-proof mechanism according to claim 1, characterized in that: The structure of the vertical guide mechanism includes: at least two door cover guide shafts are fixedly installed at the bottom of the explosion-proof door cover, each door cover guide shaft is inserted into a guide sleeve, and the guide sleeve is fixedly installed inside the explosion-proof cylinder section.

3. The gravity-type flue explosion-proof mechanism according to claim 2, characterized in that: The door cover guide shaft is provided with two shafts, which are coaxially arranged on the horizontal axis of the explosion-proof door cover and mirrored about the vertical axis of the explosion-proof door cover. The two door cover guide shafts are fixed to each other and to the explosion-proof door cover by door cover stiffeners. The arrangement of the door cover stiffeners ensures that the center of gravity of the entire explosion-proof door cover is centered.

4. The gravity-type flue explosion-proof mechanism according to claim 3, characterized in that: Two guide sleeves are also provided, and the two guide sleeves and each guide sleeve is fixed to the inner wall of the explosion-proof cylinder section by cylinder section stiffening plates.

5. The gravity-type flue explosion-proof mechanism according to claim 4, characterized in that: The anti-detachment mechanism includes: at least one door cover guide shaft with a cotter pin at its lower end, the cotter pin being used to lock against the bottom of the guide sleeve.

6. The gravity-type flue explosion-proof mechanism according to claim 1, characterized in that: The explosion-proof connector structure includes: an explosion-proof connector pipe section, with connector flanges at both ends of the explosion-proof connector pipe section for connecting to the flue, and the explosion-proof exhaust stack section is welded and fixedly sealed at the top of the explosion-proof connector pipe section.

7. The gravity-type flue explosion-proof mechanism according to claim 5, characterized in that: The lower end of each door cover guide shaft passes through the explosion-proof exhaust pipe section and extends into the explosion-proof connection seat section.

8. The gravity-type explosion-proof mechanism for flues according to claim 1, characterized in that: The explosion-proof door cover is equipped with a handle on top.

9. The gravity-type flue explosion-proof mechanism according to claim 1, characterized in that: When the sealing sleeve section at the bottom of the explosion-proof door cover presses against the sealing filler in the sealing groove, the bottom of the explosion-proof door cover does not contact the top of the explosion-proof exhaust sleeve section.

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