A reinforced seal structure for a cinder valve

Abstract

The utility model belongs to sealing structure technical field especially is a kind of reinforced sealing structure of ash valve, including upper connecting pipe, connecting flange and ash valve body, the upper connecting pipe with ash valve body between, ash valve body and lower connecting pipe between are all connected by connecting flange;The end face of connecting flange is equipped with flange milling groove, and elastic rubber ring is embedded in the flange milling groove, fastening bolt is arranged in the both sides of connecting flange, and the outside of fastening bolt is engaged with the installation of limit stopper;Through groove body accurate limit, add temperature-resistant rubber ring, the sealing life is greatly improved, fluorine rubber hollow rubber ring is pre-compressed, and rubber ring energy storage rebound compensation is realized dynamic sealing, pressure rises rubber ring release energy storage and fill the gap, pressure drops rubber ring automatic reset, through two-stage anti-loosening mechanism, limit stopper mechanical interlock, positioning screw fine adjustment, and the bolt torque attenuation rate is greatly reduced compared with traditional scheme.

Description

Technical Field

[0001] This utility model belongs to the field of sealing structure technology, specifically relating to a reinforced sealing structure for an ash discharge valve. Background Technology

[0002] Ash discharge valves are important components in dust removal equipment and conveying systems. They are mainly used for ash discharge, air supply, and feeding of powdery or granular materials. Composed of a shell, impeller, end caps, and other components, the impeller rotation evenly conveys the material to the next piece of equipment while simultaneously providing a seal to prevent air intake during pneumatic conveying. With its compact structure and good sealing performance, it prevents dust leakage. When the ash discharge valve is connected to a pipeline, it needs to be sealed, thus requiring a reinforced sealing structure.

[0003] The traditional method of connecting and installing ash discharge valves to pipelines usually involves filling the upper and lower flanges of the discharger with asbestos rope and then tightening it with bolts, which results in a sealing defect.

[0004] Poor sealing performance and short lifespan; asbestos ropes lose their elasticity under pressure fluctuations, leading to frequent seal failures.

[0005] Uncontrollable bolt loosening can easily lead to bolt torque attenuation and failure during vibration, and manual inspection cannot monitor it in real time. Utility Model Content

[0006] To address the issues raised in the background section regarding the poor sealing performance and short lifespan of traditional ash discharge valve installation methods, as well as the loss of resilience of asbestos ropes under pressure fluctuations and frequent seal failures;

[0007] Uncontrollable bolt loosening can easily lead to bolt torque attenuation and failure during vibration, and manual inspection cannot monitor this in real time. This utility model provides a reinforced sealing structure for an ash discharge valve.

[0008] To achieve the above objectives, this utility model provides the following technical solution: a reinforced sealing structure for an ash discharge valve, comprising an upper connecting pipe, a connecting flange, and an ash discharge valve body, wherein the upper connecting pipe and the ash discharge valve body, and the ash discharge valve body and the lower connecting pipe are connected by connecting flanges.

[0009] The end face of the connecting flange is provided with a flange milling groove, and an elastic rubber ring is embedded in the flange milling groove. Fastening bolts are provided on both sides of the connecting flange, and a limiting block is engaged on the outside of the fastening bolt.

[0010] As a preferred embodiment of the enhanced sealing structure for the ash discharge valve of this utility model, the elastic rubber ring is a hollow fluororubber ring with a natural diameter of 10mm and an installation compression rate of 30%-35%.

[0011] In a preferred embodiment of the enhanced sealing structure for an ash discharge valve according to this utility model, the connecting flanges are fixed relative to each other by fastening bolts, and the fastening bolts are symmetrically distributed about the vertical center line of the connecting flanges.

[0012] As a preferred embodiment of the enhanced sealing structure of the ash discharge valve of this utility model, both sides of the connecting flange are welded with fixing plates, and the fixing plates are perpendicular to the connecting flange.

[0013] As a preferred embodiment of the enhanced sealing structure of the ash discharge valve of this utility model, the limiting block has a slot that matches the shape of the head of the fastening bolt.

[0014] As a preferred embodiment of the enhanced sealing structure of the ash discharge valve of this utility model, a positioning plate is fixed on one side of the limiting block, and a positioning screw is provided inside the positioning plate. The limiting block is fixed relative to the fixing plate through the positioning plate and the positioning screw.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: In this application, the sealing life is greatly improved by precisely limiting the tank body and adding a heat-resistant rubber ring. The fluororubber hollow rubber ring is pre-compressed and the rubber ring stores energy and rebounds to compensate, thus achieving dynamic sealing. When the pressure rises, the rubber ring releases its stored energy to fill the gap, and when the pressure drops, the rubber ring automatically resets, preventing the problems of poor sealing effect and short life of traditional ash discharge valve installation methods.

[0016] This application utilizes a dual-stage anti-loosening mechanism, mechanical interlocking of limit blocks, and micro-adjustment of positioning screws to significantly reduce bolt torque attenuation compared to traditional solutions. During maintenance, only periodic tightening of the positioning screws is required, eliminating the need to operate on large-size fastening bolts and preventing uncontrollable bolt loosening that cannot be monitored in real time by manual inspection. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the connecting flange in this utility model;

[0020] Figure 3 This is a schematic diagram of the connection between the pipe and the connecting flange in this utility model;

[0021] Figure 4 This is a schematic diagram of the limiting block in this utility model.

[0022] In the diagram: 1. Upper connecting pipe; 2. Connecting flange; 3. Ash discharge valve body; 4. Lower connecting pipe; 5. Flange milled groove; 6. Elastic rubber ring; 7. Fastening bolt; 8. Limiting block; 9. Positioning plate; 10. Slot; 11. Positioning screw; 12. Fixing plate. Detailed Implementation

[0023] 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.

[0024] Example 1

[0025] like Figures 1-4 As shown;

[0026] A reinforced sealing structure for an ash discharge valve includes an upper connecting pipe 1, a connecting flange 2, and an ash discharge valve body 3. The upper connecting pipe 1 and the ash discharge valve body 3, and the ash discharge valve body 3 and the lower connecting pipe 4 are both connected by the connecting flange 2. The end face of the connecting flange 2 is provided with a flange milling groove 5, and an elastic rubber ring 6 is embedded in the flange milling groove 5. Fastening bolts 7 are provided on both sides inside the connecting flange 2, and a limiting block 8 is engaged on the outside of the fastening bolts 7.

[0027] In this implementation plan: by precisely limiting the tank body and adding a heat-resistant rubber ring, the sealing life is greatly improved. The fluororubber hollow rubber ring is pre-compressed and the rubber ring stores energy and rebounds to compensate, achieving dynamic sealing. When the pressure rises, the rubber ring releases its stored energy to fill the gap, and when the pressure drops, the rubber ring automatically resets. Through a dual-stage anti-loosening mechanism, the limit block 8 is mechanically interlocked, and the positioning screw 11 is finely adjusted, the bolt torque attenuation rate is greatly reduced compared to the traditional solution. During maintenance, only the positioning screw 11 needs to be tightened periodically, without the need to operate the large-size fastening bolt 7.

[0028] In an optional embodiment, the elastic ring 6 is a hollow fluororubber ring with a natural diameter of 10 mm and an installation compression ratio of 30%-35%.

[0029] In this implementation plan: the Φ10mm fluororubber hollow elastic ring 6 can be compressed and deformed according to the pressure change of the ash hopper, release the stored energy, instantly fill the new gap, and automatically reset after the pressure is restored.

[0030] In an optional embodiment, the connecting flanges 2 are fixed relative to each other by fastening bolts 7, which are symmetrically distributed about the vertical center line of the connecting flanges 2.

[0031] In this implementation plan: the fastening bolts 7 can provide relative positioning between the connecting flanges 2, which facilitates the connection and fixation of the ash discharge valve body 3 with the upper and lower pipes.

[0032] In an optional embodiment, fixing plates 12 are welded to both sides of the connecting flange 2, and the fixing plates 12 are perpendicular to the connecting flange 2.

[0033] In this implementation scheme: the connecting flange 2 facilitates the fixing of the limit block 8.

[0034] In an optional embodiment, the limiting block 8 has a slot 10 that matches the shape of the head of the fastening bolt 7.

[0035] In this implementation plan: the inner side of the limiting block 8 faces the head of the fastening bolt 7, and the limiting block 8 is pushed into the slot 10 until the slot 10 is fully engaged with the top of the bolt head. At the same time, one end of the positioning plate 9 is attached to the mounting surface of the fixing plate 12 to facilitate the limiting of the fastening bolt 7.

[0036] In an optional embodiment, a positioning plate 9 is fixed to one side of the limiting block 8, and a positioning screw 11 is inserted inside the positioning plate 9. The limiting block 8 is fixed relative to the fixing plate 12 through the positioning plate 9 and the positioning screw 11.

[0037] In this implementation plan: tighten the positioning screw 11 with a wrench. The conical tail of the screw presses into the long slot of the positioning plate 9, generating an axial locking force, which can lock the limit block 8 and prevent the fastening bolt 7 from loosening. Afterwards, it is only necessary to check the tightness of the positioning screw 11 periodically. The limit block plays two roles: preventing bolt loosening and limiting the amount of expansion and contraction between flanges.

[0038] Working principle: First, clean the dust and oil stains inside the upper connecting pipe 1, flange milling groove 5, ash discharge valve body 3 flange milling groove 5, lower connecting pipe 4, and flange milling groove 5. Apply high-temperature resistant silicone grease evenly inside the groove. Then, embed the Φ10mm fluororubber hollow elastic ring 6 around the flange milling groove 5. The joint of the elastic ring 6 uses a 45° beveled overlap with an overlap length ≥15mm. Next, align the upper connecting pipe 1 with the flange end face of the ash discharge valve body 3, insert and tighten the fastening bolt 7 to induce initial compression deformation of the ring. Repeat the same process to connect the ash discharge valve body 3 and the lower connecting pipe 4. Then, with the inner side of the limiting block 8 facing the head of the fastening bolt 7, push the limiting block 8 into the groove 10 until the groove 10 is fully engaged with the top of the bolt head. Simultaneously, one end of the positioning plate 9 adheres to the fixing plate 12. Install the positioning screw 11 and tighten it with a wrench. The conical tail of the screw presses into the long slot of the positioning plate 9, generating axial locking force. Finally, when the ash hopper pressure is ≤0.6MPa, the elastic rubber ring 6 maintains 30% compression deformation, with a diameter of 7mm and a sealing specific pressure of 0.4MPa. The flange end face gap is completely filled by the rubber ring. When the pressure rises sharply to 0.8MPa, the flange gap increases, the rubber ring rebounds and releases stored energy, and the deformation rate drops to 25%, instantly filling the new gap. After the pressure recovers, the rubber ring automatically resets. When the equipment vibration causes the fastening bolt 7 to rotate, the limit block 8 interlocks with the bolt to limit the rotation angle. Thus, it is only necessary to check the tightness of the positioning screw 11 periodically. Since the positioning screw 11 is small in size, it is easy to tighten or maintain.

[0039] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A reinforced sealing structure for an ash discharge valve, comprising an upper connecting pipe (1), a connecting flange (2), and an ash discharge valve body (3), characterized in that: The upper connecting pipe (1) is connected to the ash discharge valve body (3), and the ash discharge valve body (3) is connected to the lower connecting pipe (4) through connecting flanges (2); The end face of the connecting flange (2) is provided with a flange milling groove (5), and an elastic rubber ring (6) is embedded in the flange milling groove (5). Fastening bolts (7) are provided on both sides of the connecting flange (2), and a limiting block (8) is engaged on the outside of the fastening bolt (7).

2. The reinforced sealing structure of the ash discharge valve according to claim 1, characterized in that: The elastic rubber ring (6) is a hollow fluororubber ring with a natural diameter of 10mm and an installation compression ratio of 30%-35%.

3. The reinforced sealing structure of the ash discharge valve according to claim 1, characterized in that: The connecting flanges (2) are fixed to each other by fastening bolts (7), and the fastening bolts (7) are symmetrically distributed about the vertical center line of the connecting flanges (2).

4. The reinforced sealing structure of the ash discharge valve according to claim 1, characterized in that: The connecting flange (2) has a fixing plate (12) welded on both sides, and the fixing plate (12) is perpendicular to the connecting flange (2).

5. The reinforced sealing structure of the ash discharge valve according to claim 1, characterized in that: The limiting block (8) has a slot (10) inside, and the slot (10) matches the head shape of the fastening bolt (7).

6. The reinforced sealing structure of the ash discharge valve according to claim 4, characterized in that: A positioning plate (9) is fixed on one side of the limiting block (8), and a positioning screw (11) is inserted inside the positioning plate (9). The limiting block (8) is fixed relative to the fixing plate (12) through the positioning plate (9) and the positioning screw (11).

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