Flange detachable connecting and fastening device

Abstract

The utility model relates to the technical field of boiler equipment, and provides a flange detachable connecting and fastening device which comprises two flanges, a gasket is arranged between the two flanges, fluid channels are formed in the gasket and the two flanges, and clamping grooves are formed in the outer side faces of the gasket and the two flanges. The limiting assembly comprises a plug, a blocking part and a pre-tightening piece, the plug is arranged in the clamping groove and matched with the clamping groove, an inserting groove which extends inwards and inclines downwards is formed in the peripheral face of the plug, the blocking part is fixedly installed on the plug and makes contact with the outer end face of the first flange, and the pre-tightening piece is arranged in the inserting groove and matched with the inserting groove; the pre-tightening piece is in contact with the outer end face of the second flange; the limiting block is fixedly mounted on the second flange, is in contact with the pre-tightening piece and is used for preventing the plug from being separated from the clamping groove; the hook plate is fixedly installed on one flange, a limiting groove is formed in the hook plate, and the inner wall of the limiting groove is in tight contact with the two flanges.

Description

Technical Field

[0001] This utility model relates to the field of boiler equipment technology, specifically to a flange detachable connection fastening device. Background Technology

[0002] The detachable flange fastening device is used to connect two flanges. One flange is connected to the water vapor zone channel to introduce the water vapor mixture after heat exchange in the furnace. The other flange is connected to the cyclone separator to introduce the water vapor mixture into the cyclone separator for steam-water separation.

[0003] However, the space on both sides of the flange is narrow during installation, and the flange is facing away from the installers, making it difficult to apply pre-tightening force through conventional bolt connection. At the same time, multiple cyclone separators often vibrate under the dynamic pressure impact of steam and water during actual operation, which may cause the pre-tightened nuts to lose pre-tightening force or even fall off, leading to leakage. In addition, for boilers with large evaporation capacity, the number of cyclone separators is large, making it difficult to improve installation and maintenance efficiency.

[0004] Therefore, how to ensure that the detachable flange fastening device can maintain good sealing performance and not fall off in a vibrating working environment is a technical problem that urgently needs to be solved in this field. Utility Model Content

[0005] In view of the deficiencies in the prior art, the purpose of this utility model is to provide a flange detachable connection fastening device that can maintain good sealing performance and prevent detachment in a vibrating working environment.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a flange detachable connection fastening device, comprising:

[0007] Two flanges are fitted together, and a gasket is provided between the two flanges. A fluid channel is formed on the gasket and the two flanges in a transverse direction. A groove extending downward and in a transverse direction is formed on the outer surface of the gasket and the two flanges.

[0008] A limiting assembly includes a plug, a blocking part, and a pre-tightening member. The plug is disposed in and adapted to the slot. An inwardly extending and downwardly inclined slot is formed on the outer peripheral surface of the plug. The blocking part is fixedly installed on the plug and contacts the outer end face of the first flange. The pre-tightening member is disposed in and adapted to the slot. The pre-tightening member contacts the outer end face of the second flange.

[0009] A limiting block is fixedly installed on the second flange and in contact with the pre-tightening member. The limiting block is used to prevent the plug from disengaging from the slot.

[0010] A hook plate is fixedly installed on one of the flanges, and a limiting groove is formed on the hook plate, the inner wall of the limiting groove being in close contact with both flanges.

[0011] Furthermore, the inner side of the pre-tightening member is in surface contact with the outer end face of the second flange.

[0012] Furthermore, the slot extends through the entire plug, and the cross-sectional shape of the slot is a right trapezoid.

[0013] Furthermore, the preloaded component has a through unloading hole.

[0014] Furthermore, the hook plate and the limiting component are respectively disposed on both sides of the fluid channel.

[0015] Furthermore, the slot has a U-shaped structure.

[0016] The beneficial effects of this utility model are as follows: This utility model provides a detachable flange connection and fastening device. The pre-tightening component and the blocking component can respectively generate inward clamping force on the two flanges, thereby achieving the effect of pre-tightening and sealing the two flanges. At the same time, the limiting component can be directly installed from the top of the two flanges, and the provided limiting block also has the function of preventing the limiting component from vibrating and falling off. Therefore, this device can maintain good sealing performance and not fall off in a vibrating working environment. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0018] Figure 2 This is a front view structural diagram of the present utility model;

[0019] Figure 3 This is a side view of the structure of this utility model;

[0020] Figure 4 This is a top view of the structure of this utility model;

[0021] Figure 5 This is a three-dimensional structural diagram of the plug.

[0022] Reference numerals: 10-flange, 11-gasket, 12-fluid passage, 13-slot, 20-limiting assembly, 21-plug, 22-blocking part, 23-pre-tightening part, 231-unloading round hole, 24-slot, 30-limiting block, 40-hook plate, 41-limiting groove. Detailed Implementation

[0023] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0024] In this application, unless otherwise expressly specified and limited, the terms "connection" and "fixed" 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 or an electrical 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.

[0025] In the description of this application, it should be understood that the terms "longitudinal", "horizontal", "level", "top", "bottom", "upper", "lower", "inner" and "outer", etc., indicate the orientation or positional relationship 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 do not 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.

[0026] Furthermore, the terms "first," "second," etc., 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. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly defined.

[0027] like Figures 1-5 As shown, this utility model provides a flange detachable connection fastening device, including two flanges 10, a limiting component 20, a limiting block 30 and a hook plate 40.

[0028] Two flanges 10 are fitted together, and a gasket 11 is placed between the two flanges 10 for sealing. A transverse fluid channel 12 is formed on the gasket 11 and the two flanges 10 for guiding the steam-water mixture in. A downwardly extending and transversely penetrating groove 13 is formed on the outer surface of the gasket 11 and the two flanges 10.

[0029] The limiting assembly 20 includes a plug 21, a blocking portion 22, and a pre-tightening member 23. The plug 21 is disposed within and adapted to the slot 13. An inwardly extending and downwardly inclined slot 24 is formed on the outer peripheral surface of the plug 21. The blocking portion 22 is fixedly mounted on the plug 21 and contacts the outer end face of the first flange 10; preferably, the blocking portion 22 is a cylindrical structure. The pre-tightening member 23 is disposed within and adapted to the slot 24, and contacts the outer end face of the second flange 10.

[0030] The limiting block 30 is fixedly installed on the second flange 10 and in contact with the pre-tightening member 23. The limiting block 30 is located above the plug 21 and is used to prevent the plug 21 from disengaging from the slot 13.

[0031] The hook plate 40 is fixedly installed on one of the flanges 10. The hook plate 40 has a limiting groove 41, and the inner wall of the limiting groove 41 is in close contact with the two flanges 10.

[0032] The specific installation process of this device is as follows: First, the operator inserts the plug 21 into the slot 13, so that the blocking part 22 abuts against the corresponding flange 10. Then, the operator inserts the pre-tightening block into the slot 24. At this time, the pre-tightening part 23 and the blocking part 22 can respectively generate inward pressing force on the two flanges 10, thereby achieving the effect of pre-tightening and sealing the two flanges 10.

[0033] The limiting block 30 contacts the pretensioner 23, thereby preventing the pretensioner 23 from moving outward and avoiding the limiting component 20 from falling off due to vibration.

[0034] It is worth noting that the slot 24 is inclined downwards, so the pre-tightening member 23 is not easy to fall out of the slot 24 under the action of gravity; if the slot 24 is horizontal, the pre-tightening member 23 may fall out during vibration. Therefore, this device can maintain good sealing performance and not fall out in a vibrating working environment.

[0035] Compared with conventional structures that use bolts for fastening, this utility model has a simple structure and can pre-tighten the two flanges 10 without complicated and time-consuming installation. At the same time, reasonable limiting can prevent the pre-tightening parts 23 from slipping off due to equipment vibration during operation, effectively ensuring the stability of equipment performance.

[0036] In one embodiment, the inner side of the preload 23 is in surface contact with the outer end face of the second flange 10, so that the preload 23 can apply preload force to the corresponding flange 10 more stably and evenly.

[0037] In one embodiment, the slot 24 extends through the entire plug 21, and the cross-sectional shape of the slot 24 is a right-angled trapezoid. Correspondingly, the preload 23 is also a right-angled trapezoidal plate, and the preload 23 extends through the entire slot 24.

[0038] This design has the following advantages: 1. After installation, the operator presses the pre-tightening member 23. The inclined side of the pre-tightening member 23 interacts with the inner wall of the trapezoidal hole, causing the blocking part 22 to exert a clamping force on the contacting flange 10, and the right-angled side of the pre-tightening member 23 to exert a clamping force on the contacting flange 10, ultimately achieving the effect of pre-tightening and sealing the two flanges 10. 2. Both ends of the pre-tightening member 23 will contact the corresponding flange 10, making the device more stable.

[0039] In one embodiment, the pretensioner 23 has a through unloading hole 231. When repairing the device, the operator can quickly remove the pretensioner 23 through the unloading hole 231 and then remove the plug 21 to complete the quick disassembly of the device.

[0040] In one embodiment, the hook plate 40 and the limiting component 20 are respectively disposed on both sides of the fluid channel 12, and the two flanges 10 are pre-tightened at two opposite positions to further improve the pre-tightening effect.

[0041] In one embodiment, the slot 13 has a U-shaped structure. Correspondingly, the plug 21 also has a flat surface and a curved surface. The flat surface of the plug 21 contacts the flat surface of the slot 13, and the curved surface of the plug 21 contacts the curved surface of the slot 13. In this way, the plug 21 cannot rotate within the slot 13, further improving the stability of the device.

[0042] 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.

[0043] 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 also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A flange detachable connection fastening device, characterized in that: include: Two flanges are fitted together, and a gasket is provided between the two flanges. A fluid channel is formed on the gasket and the two flanges in a transverse direction. A groove extending downward and in a transverse direction is formed on the outer surface of the gasket and the two flanges. A limiting assembly includes a plug, a blocking part, and a pre-tightening member. The plug is disposed in and adapted to the slot. An inwardly extending and downwardly inclined slot is formed on the outer peripheral surface of the plug. The blocking part is fixedly installed on the plug and contacts the outer end face of the first flange. The pre-tightening member is disposed in and adapted to the slot. The pre-tightening member contacts the outer end face of the second flange. A limiting block is fixedly installed on the second flange and in contact with the pre-tightening member. The limiting block is used to prevent the plug from disengaging from the slot. A hook plate is fixedly installed on one of the flanges, and a limiting groove is formed on the hook plate, the inner wall of the limiting groove being in close contact with both flanges.

2. The flange detachable connection fastening device according to claim 1, characterized in that: The inner surface of the pre-tightening member is in surface contact with the outer end face of the second flange.

3. The flange detachable connection fastening device according to claim 2, characterized in that: The slot extends through the entire plug, and the cross-sectional shape of the slot is a right trapezoid.

4. The flange detachable connection fastening device according to claim 1, characterized in that: The pre-tightening component has a through unloading hole.

5. A flange detachable connection fastening device according to claim 1, characterized in that: The hook plate and the limiting component are respectively disposed on both sides of the fluid channel.

6. A flange detachable connection fastening device according to claim 1, characterized in that: The slot has a U-shaped structure.

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