Fastening device for plate type flat welding flange

Abstract

The fastening device comprises a first flange and a second flange, a plurality of fixing cylinders are fixedly arranged on the inner side of the first flange, a plurality of fixing columns are fixedly arranged on the inner side of the second flange, one ends of the fixing columns are arranged in the fixing cylinders in a penetrating mode, and the other ends of the fixing columns are arranged in the fixing cylinders in a penetrating mode. A fixing mechanism is arranged on one side of each fixing cylinder, a plurality of positioning holes are formed in one end of the first flange, a plurality of positioning columns are fixedly arranged at one end of the second flange, a limiting mechanism is arranged on the fixing columns, each fixing mechanism comprises a fixing block fixedly arranged on one side of the corresponding fixing cylinder, and a cavity is formed in each fixing block; a sliding block capable of sliding is arranged in the cavity, a fixing pin is fixedly arranged at the front end of the sliding block, the top end of the fixing pin penetrates through the fixing cylinder and is located in the fixing column, a pull block penetrates through one side of the fixing block, a reset spring penetrates through the pull block, and a pull ring is connected to the tail end of the pull block. The fixing device has the advantages of being reasonable in structure, convenient to fix and disassemble and high in connection strength.

Description

Technical Field

[0001] The utility model relates to the technical field of flanges, in particular to a fastening device for plate-type flat-weld flanges. Background Art

[0002] Flange, also known as a flange, is a general term for a disc-shaped metal body with several holes cut around its perimeter for connection. Pipes are typically connected using flanges, threads, or welding. Flanges are the most common connection method, especially for high-pressure applications, where they are preferred for ease of installation and disassembly. The flange connection structure uses matching flanges and is fastened with circumferentially distributed bolts. A gasket is placed between the matching flanges, and the bolts compress the gasket to achieve a sealing effect. Multiple bolts are typically evenly distributed on the flange, and the optimal tightening requirement is that each bolt has the same and sufficient tightening force.

[0003] Traditional flange fastening devices have a simple fixing structure. After a period of use, the screws on the flange often loosen, resulting in a loose flange. Furthermore, the screws are prone to rusting over time, making disassembly of the flanges cumbersome. To address these issues, the following solution is proposed. Utility Model Content

[0004] The purpose of the utility model is to provide a fastening device for a plate-type flat-weld flange, which has the advantages of convenient fixing and disassembly and high connection strength.

[0005] The above technical objectives of the present invention are achieved through the following technical solutions:

[0006] A fastening device for a plate-type flat-weld flange comprises a first flange and a second flange, wherein a plurality of fixing cylinders are fixedly provided on the inner side of the first flange, a plurality of fixing columns are fixedly provided on the inner side of the second flange, one end of the plurality of fixing columns are respectively passed through the fixing cylinder, a fixing mechanism is respectively provided on one side of each of the fixing cylinders, and the fixing cylinders and the fixing columns are fixedly connected through the fixing mechanism, a plurality of positioning holes are opened at one end of the first flange, a plurality of positioning columns are fixedly provided at one end of the second flange, a plurality of positioning columns are respectively passed through the positioning holes, and a limiting mechanism is provided on the fixing columns.

[0007] Preferably, the fixing mechanism includes a fixed block fixed on one side of the fixed cylinder, each of the fixed blocks is provided with a cavity, a slidable slider is provided in the cavity, a fixing pin is fixed to the front end of the slider, the top end of the fixing pin is passed through the fixed cylinder and is located in the fixed column, a pull block is passed through one side of the fixed block, and one end of the pull block is fixedly connected to the slider, a return spring is passed through the pull block, and the return spring is connected between one side of the slider and the side wall of the cavity, and a pull ring is connected to the tail end of the pull block.

[0008] Preferably, the limiting mechanism includes a limiting ring, and the limiting ring is passed through the positioning column, and one end is in contact with the inner side of the first flange. Two limiting pins are passed through the limiting ring, and the top ends of the two limiting pins are respectively located in the positioning columns. A limiting spring is passed through the limiting pin, and the two ends of the limiting spring are respectively fixedly connected to the outer wall of the limiting ring and the tail end of the limiting pin.

[0009] Preferably, a first sealing groove and a second sealing groove are provided at one end of the first flange and one end of the second flange respectively, a first sealing ring and a second sealing ring are provided in the first sealing groove and the second sealing groove respectively, and the first sealing ring and the second sealing ring are in contact with each other.

[0010] The beneficial effects of the utility model are:

[0011] 1. Fit the first flange and the second flange together so that one end of several fixing columns are respectively inserted into the fixing cylinder. Then, the fixing column and the fixing cylinder can be fixed by the fixing mechanism, thereby achieving a fixed connection between the first flange and the second flange. Therefore, compared with traditional bolt fixing, it has the advantage of convenient disassembly and assembly.

[0012] 2. After the first flange and the second flange are fixed, several positioning columns can be respectively inserted into the positioning holes to make the fixed positions of the first flange and the second flange more accurate. The positioning columns can then be limited and tightened by the limiting mechanism to increase the connection strength between the first flange and the second flange. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural diagram of an embodiment;

[0014] Figure 2 This is a schematic structural diagram of the first flange in the embodiment;

[0015] Figure 3 This is a schematic structural diagram of the second flange in the embodiment;

[0016] Figure 4 It is a partial structural cross-sectional view of an embodiment.

[0017] Figure numerals: 1. first flange; 2. second flange; 3. fixing cylinder; 4. fixing column; 5. fixing mechanism; 6. positioning hole; 7. positioning column; 8. limiting mechanism; 9. fixing block; 10. cavity; 11. slider; 12. fixing pin; 13. pull block; 14. return spring; 15. pull ring; 16. limiting ring; 17. limiting pin; 18. limiting spring; 19. first sealing groove; 20. second sealing groove; 21. first sealing ring; 22. second sealing ring. DETAILED DESCRIPTION

[0018] The following is only a preferred embodiment of the present invention, and the scope of protection is not limited to this embodiment. All technical solutions under the concept of the present invention should fall within the scope of protection of the present invention. The same parts are represented by the same figure marks. It should be noted that the words "front", "rear", "left", "right", "up" and "down" used in the following description refer to the directions in the accompanying drawings, and the words "bottom" and "top", "inside" and "outside" refer to the directions toward or away from the geometric center of a specific component, respectively.

[0019] like Figures 1 to 4 As shown, a fastening device for a plate-type flat-weld flange includes a first flange 1 and a second flange 2. A plurality of fixing cylinders 3 are fixedly provided on the inner side of the first flange 1, and a plurality of fixing columns 4 are fixedly provided on the inner side of the second flange 2. One end of the plurality of fixing columns 4 is respectively passed through the fixing cylinder 3. A fixing mechanism 5 is respectively provided on one side of each fixing cylinder 3, and the fixing cylinder 3 and the fixing column 4 are fixedly connected through the fixing mechanism 5. The first flange 1 and the second flange 2 are fitted together so that one end of the plurality of fixing columns 4 is respectively inserted into the fixing cylinder 3. Then, the fixing between the fixing column 4 and the fixing cylinder 3 can be achieved through the fixing mechanism 5, thereby achieving a fixed connection between the first flange 1 and the second flange 2.

[0020] The fixing mechanism 5 includes a fixing block 9 fixed on one side of the fixing cylinder 3, each fixing block 9 is provided with a cavity 10, a slidable slider 11 is provided in the cavity 10, a fixing pin 12 is fixed to the front end of the slider 11, the top end of the fixing pin 12 is passed through the fixing cylinder 3 and is located in the fixing column 4, a pull block 13 is passed through one side of the fixing block 9, and one end of the pull block 13 is fixedly connected to the slider 11, a reset spring 14 is passed through the pull block 13, and the reset spring 14 is connected between one side of the slider 11 and the side wall of the cavity 10, and a pull ring 15 is connected to the tail end of the pull block 13. By pulling the pull ring 15, the pull block 13 can be driven outward. When the fixing column 4 is inserted into the fixing cylinder 3, the slider 11 can be driven back to its initial position by the reset action of the reset spring 14, thereby driving the top end of the fixing pin 12 to enter the fixing cylinder 3 again, that is, the top end of the fixing pin 12 is pushed into the fixing cylinder 3 to realize the fixation between the fixing cylinder 3 and the fixing column 4. Similarly, the disassembly between the fixing column 4 and the fixing cylinder 3 can also be realized. Therefore, compared with the traditional bolt fixing, it has the advantage of convenient disassembly and assembly.

[0021] One end of the first flange 1 is provided with a plurality of positioning holes 6, and one end of the second flange 2 is fixed with a plurality of positioning columns 7, which are respectively inserted into the positioning holes 6. A limiting mechanism 8 is provided on the fixing column 4. When the first flange 1 and the second flange 2 are fixed, the plurality of positioning columns 7 can be respectively inserted into the positioning holes 6, so that the fixed position of the first flange 1 and the second flange 2 is more accurate. Thereafter, the positioning columns 7 can be limited and tightened by the limiting mechanism 8 to increase the connection strength between the first flange 1 and the second flange 2.

[0022] The limiting mechanism 8 includes a limiting ring 16, and the limiting ring 16 is provided on the positioning column 7, and one end is in contact with the inner side of the first flange 1, and two limiting pins 17 are provided in the limiting ring 16. The top ends of the two limiting pins 17 are respectively located in the positioning column 7, and a limiting spring 18 is provided on the limiting pin 17. The two ends of the limiting spring 18 are respectively fixedly connected to the outer wall of the limiting ring 16 and the tail end of the limiting pin 17. By pulling the two limiting pins 17 outward, the limiting pin 17 can slide outward along the limiting ring 16. When the limit spring 18 is stretched to generate elastic force, the limit ring 16 can be inserted into the positioning column 7, so that one end of the limit ring 16 is in contact with the inner side of the first flange 1, and then the limit pin 17 can be driven back to the initial position by the reset effect of the limit spring 18. At this time, the top end of the limit pin 17 is pushed into the positioning column 7, so that the positioning column 7 can be limited and tightened to prevent loosening between the first flange 1 and the second flange 2, thereby further increasing the connection strength between the first flange 1 and the second flange 2.

[0023] A first sealing groove 19 and a second sealing groove 20 are respectively provided at one end of the first flange 1 and one end of the second flange 2. A first sealing ring 21 and a second sealing ring 22 are respectively provided in the first sealing groove 19 and the second sealing groove 20, and the first sealing ring 21 and the second sealing ring 22 are in contact with each other. When the first flange 1 and the second flange 2 are connected, the first sealing ring 21 and the second sealing ring 22 can effectively increase the connection sealing between the first flange 1 and the second flange 2 to prevent water leakage.

[0024] The specific embodiments described above further illustrate the technical problems, technical solutions and beneficial effects solved by the present invention. It should be understood that the above are only specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A fastening device for plate-type flat welding flange, characterized in that: The invention comprises a first flange (1) and a second flange (2), wherein a plurality of fixing cylinders (3) are fixedly provided on the inner side of the first flange (1), and a plurality of fixing columns (4) are fixedly provided on the inner side of the second flange (2), and one end of the plurality of fixing columns (4) is respectively passed through the fixing cylinder (3), and a fixing mechanism (5) is respectively provided on one side of each of the fixing cylinders (3), and the fixing cylinder (3) and the fixing column (4) are fixedly connected via the fixing mechanism (5), and a plurality of positioning holes (6) are opened at one end of the first flange (1), and a plurality of positioning columns (7) are fixedly provided at one end of the second flange (2), and the plurality of positioning columns (7) are respectively passed through the positioning holes (6), and a limiting mechanism (8) is provided on the fixing column (4).

2. A fastening device for plate-type flat welding flange according to claim 1, characterized in that: The fixing mechanism (5) includes a fixing block (9) fixed on one side of the fixing cylinder (3), each of the fixing blocks (9) is provided with a cavity (10), a slidable slider (11) is provided in the cavity (10), a fixing pin (12) is fixed at the front end of the slider (11), the top end of the fixing pin (12) passes through the fixing cylinder (3) and is located in the fixing column (4), a pull block (13) is passed through one side of the fixing block (9), and one end of the pull block (13) is fixedly connected to the slider (11), a reset spring (14) is passed through the pull block (13), and the reset spring (14) is connected between one side of the slider (11) and the side wall of the cavity (10), and a pull ring (15) is connected to the tail end of the pull block (13).

3. A fastening device for plate-type flat welding flange according to claim 2, characterized in that: The limiting mechanism (8) includes a limiting ring (16), and the limiting ring (16) is passed through the positioning column (7), and one end is in contact with the inner side of the first flange (1), two limiting pins (17) are passed through the limiting ring (16), and the top ends of the two limiting pins (17) are respectively located in the positioning column (7), and a limiting spring (18) is passed through the limiting pin (17), and the two ends of the limiting spring (18) are respectively fixedly connected to the outer wall of the limiting ring (16) and the tail end of the limiting pin (17).

4. A fastening device for plate-type flat welding flange according to claim 3, characterized in that: One end of the first flange (1) and one end of the second flange (2) are respectively provided with a first sealing groove (19) and a second sealing groove (20); a first sealing ring (21) and a second sealing ring (22) are respectively provided in the first sealing groove (19) and the second sealing groove (20); and the first sealing ring (21) and the second sealing ring (22) are in contact with each other.

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