Flange fixture for emergency plugging

Abstract

The utility model relates to a flange leaking stoppage sealing fixture, in particular to a flange fixture for emergency leaking stoppage, which comprises a semi-ring a1 and a semi-ring b, two ends of the semi-ring a and the semi-ring b are in mortise and tenon joint connection and wrap a flange along the outer diameter by a circle, clamping strips are arranged on the inner sides of the semi-ring a1 and the semi-ring b along the ring edge, and at least two glue injection holes are uniformly distributed on the semi-ring a and the semi-ring b along the circumferential direction. The outer walls of the two ends of the semi-ring a and the semi-ring b are provided with sliding grooves which are symmetrical up and down, threaded holes communicated with the end faces are formed in the sliding grooves, fastening bolts are connected into the threaded holes 1 in a threaded mode, positioning tables are arranged at the tops and the bottoms of the inner sides of the semi-ring a1 and the semi-ring b along the ring edges, and ring grooves are formed between the positioning tables and the clamping strips. The two ends of the semi-ring a and the semi-ring b are connected in a mortise and tenon joint mode, the flange is wrapped by a circle along the outer diameter, the situation that fastening force is reduced due to deformation of the fastening lug plate is avoided, the overall rigidity is improved, packing is added in the annular groove for sealing, and the leaking stoppage effect is further improved.

Description

Technical Field

[0001] The utility model relates to a flange leakage plugging and sealing fixture, in particular to a flange fixture for emergency leakage plugging. Background Technique

[0002] During the production and operation of oil pipelines, they are in a complex and harsh environment for a long time, resulting in easy leakage of the flange sealing surface of the oil pipeline. This not only causes waste of resources, but also the safety accidents caused by leakage threaten the equipment and personal safety. Traditional pressure - tight plugging is to inject sealant into the sealing cavity of the flange fixture to seal the leakage point. Currently, flange fixtures are often integrally processed and welded and fastened to the connecting ear plates after being split. However, such fixtures have poor sealing effect on the joint surface. At the same time, the farther the fastening bolts on the connecting ear plates of the fixture are from the flange surface, the lower the fastening strength, resulting in a decrease in the sealing effect and thus the failure of leakage plugging. Content of the Utility Model

[0003] The purpose of the utility model is to provide a flange fixture for emergency leakage plugging, so as to solve the problems of poor sealing performance and low connection strength of the flange fixture for sealing and plugging leakage through connecting ear plates mentioned in the above background technique, which leads to the failure of emergency leakage plugging work.

[0004] To achieve the above purpose, the utility model provides the following technical solutions:

[0005] A flange fixture for emergency leakage plugging, comprising a semi - ring a and a semi - ring b. The two ends of the semi - ring a and the semi - ring b are connected by mortise - tenon joints and wrap the flange around the outer diameter. Card strips are arranged along the inner side edges of the semi - ring a and the semi - ring b. Not less than two glue - injection holes are evenly distributed circumferentially on the semi - ring a and the semi - ring b, and the glue - injection holes penetrate through the card strips. Glue - injection stop valves are threadedly connected to the semi - ring a and the semi - ring b through the glue - injection holes on the outer side. Slide grooves symmetrically arranged up and down are opened on the outer walls at both ends of the semi - ring a and the semi - ring b, threaded holes communicating with the end faces are opened in the slide grooves, and fastening bolts are threadedly connected in the threaded holes;

[0006] Positioning platforms are arranged along the top and bottom edges of the inner sides of the semi - ring a and the semi - ring b, and annular grooves are arranged between the positioning platforms and the card strips.

[0007] Preferably, the end face of the annular groove is rectangular, and packing is arranged in the annular groove and protrudes outwards.

[0008] Preferably, the distance between the top and bottom positioning platforms on the inner sides of the semi - ring a and the semi - ring b is less than the gap between the two connecting flanges.

[0009] Preferably, clamping platforms one are arranged at both ends of the semi - ring a, clamping platforms two are arranged at both ends of the semi - ring b, and the clamping platforms one and the clamping platforms two are in clamping cooperation.

[0010] Preferably, the cross-sections of the first clamping platform and the second clamping platform are both Z-shaped, and the inclined surface angles of the first clamping platform and the second clamping platform are both set to 3-10°.

[0011] Preferably, a soft metal sheet is arranged between the inclined surfaces when the first clamping platform and the second clamping platform are clamped.

[0012] Preferably, the fastening bolts are internal hexagonal concave bolts.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0014] The flange clamp for emergency repair and plugging is connected by tenon and mortise at both ends of the semi-ring a and the semi-ring b and wraps the flange along the outer diameter, avoiding the reduction of the fastening force caused by the deformation of the fastening ear plate, improving the overall rigidity. The butt joint surfaces at both ends of the semi-ring a and the semi-ring b are clamped and matched in a Z-shape, enhancing the connection strength and overall sealing performance;

[0015] The packing seal is added in the annular groove. After the flange clamp is installed on the leaking flange, the packing is pressed into a rectangular cross-section by tightening the clamp, and a convex platform will be pressed out at the packing reaching the gap between the flanges. This convex platform and the edge line of the flange form a new line seal, further enhancing the plugging effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0017] Figure 2 is a schematic diagram of the snap ring structure of the present utility model;

[0018] Figure 3 is a schematic side view structure diagram of the present utility model;

[0019] Figure 4 is a schematic diagram of the positioning platform, clamping strip and other structures of the present utility model;

[0020] Figure 5 is a schematic diagram of the semi-ring a structure of the present utility model;

[0021] Figure 6 is a schematic diagram of the semi-ring b structure of the present utility model;

[0022] Figure 7 is a schematic cross-sectional view of the present utility model after assembly.

[0023] Reference numerals in the drawings:

[0024] 1. Semi-ring a; 2. Semi-ring b; 3. Glue injection stop valve; 4. Annular groove; 5. Packing; 6. Fastening bolt; 7. Slide groove; 8. Glue injection hole; 9. Positioning platform; 10. First clamping platform; 11. Clamping strip; 12. Threaded hole; 13. Second clamping platform; 14. Flange. Detailed implementation mode

[0025] In order to make the technical means, creative features, achieved purposes and effects realized by the present utility model easy to understand, the present utility model will be further described below in conjunction with specific implementation modes.

[0026] Now in combination with the attached Figure 1-7 As shown, the following is a specific technical solution of a flange fixture for emergency rescue and leak stoppage:

[0027] A flange fixture for emergency rescue and leak stoppage, comprising a semi-ring a1 and a semi-ring b2. The two ends of the semi-ring a1 and the semi-ring b2 are tenon-mortise connected and wrap the flange 14 along the outer diameter in a circle. A clamping strip 11 is arranged along the inner side of the semi-ring a1 and the semi-ring b2 along the ring edge. The semi-ring a1 and the semi-ring b2 are evenly provided with at least two glue injection holes 8 along the circumferential direction. The glue injection holes 8 penetrate through the clamping strip 11. Glue injection stop valves 3 are threadedly connected to the outer sides of the semi-ring a1 and the semi-ring b2 through the glue injection holes 8. Symmetrically arranged chutes 7 are opened on the outer walls at both ends of the semi-ring a1 and the semi-ring b2. Threaded holes 12 communicating with the end faces are opened in the chutes 7. A fastening bolt 6 is threadedly connected in the threaded hole 12. The fastening bolt 6 is an internal hexagonal concave bolt;

[0028] Positioning platforms 9 are arranged along the inner sides of the top and bottom of the semi-ring a1 and the semi-ring b2 along the ring edge. Annular grooves 4 are arranged between the positioning platforms 9 and the clamping strips 11;

[0029] When a flange group leaks, first measure and determine the flange size specification, and select a matching flange fixture. First, initially tenon-mortise connect one end of the semi-ring a1 and the semi-ring b2 through the fastening bolt 6, so that the semi-ring a1 and the semi-ring b2 wrap the flange 14 along the outer diameter in a circle. During installation, make the positioning platform 9 at the top flush with the top of the flange 14, and the positioning platform 9 at the bottom flush with the bottom of the flange 14. At the same time, align the clamping strip 11 with the gap between the two flanges, and then use the fastening bolt 6 to connect and fix both ends of the semi-ring a1 and the semi-ring b2. The tenon-mortise connection further improves the connection strength and overall sealing performance between the semi-ring a1 and the semi-ring b2. Finally, inject sealant between the two flanges 14 through the glue injection stop valve 3 and the glue injection hole 8 to achieve the effect of sealing and leak stoppage.

[0030] It should be noted that the end face of the annular groove 4 is rectangular, and packing 5 is arranged in the annular groove 4 and protrudes outward. The distance between the top and bottom positioning platforms 9 on the inner sides of the half-ring a1 and the half-ring b2 is less than the gap between the two connecting flanges; when the half-ring a1 and the half-ring b2 are connected and fastened, the packing 5 enters the gap between the flanges 14 and contacts and presses against the flanges 14 to deform into a rectangle, enhancing the sealing performance. At the same time, the packing 5 tightly presses against the edges of the flanges 14 to form a protruding annular platform, so that a high-pressure linear seal is formed at the gap of the flanges 14. Thus, when injecting glue into the closed cavity of the clamp, the leaked medium inside will push the protruding annular platform outward under the action of pressure, making the seal tighter and further improving the sealing performance. However, due to the different specifications of the flanges, the sizes of the annular grooves 4 in the flange clamp will also be different. To ensure the best sealing effect of the packing 5 in the annular groove 4, the width and depth of the annular groove 4 can be processed according to the dimensions shown in Table 1:

[0031] Table 1 Processing Dimensions of Annular Grooves of Flange Clamps with Different Specifications

[0032]

[0033] Both ends of the half-ring a1 are provided with the first clamping platforms 10, and both ends of the half-ring b2 are provided with the second clamping platforms 13. The first clamping platforms 10 and the second clamping platforms 13 are in clamping cooperation. The cross-sections of the first clamping platforms 10 and the second clamping platforms 13 are both Z-shaped, and the inclined surface angles of the first clamping platforms 10 and the second clamping platforms 13 are both set to 3-10°. The setting of the inclined surfaces increases the degree of fit and connection strength between the contact surfaces. When the first clamping platforms 10 and the second clamping platforms 13 are clamped, soft metal sheets are arranged between the inclined surfaces; since there will be a certain gap between the metal contact surfaces, the soft metal sheets will undergo plastic deformation under the action of the tightening force of the clamp, further improving the sealing performance of the connection ends of the half-ring a1 and the half-ring b2.

[0034] It should be noted that if the number of glue injection holes of the leak stoppage clamp is too large, it will affect the overall strength of the clamp. If it is too small, it may lead to uneven distribution of the sealant, affecting the leak stoppage effect. Therefore, choosing the appropriate number of glue injection holes is beneficial to the uniform distribution of the sealant, so as to better fill the leakage space and enhance the sealing performance. The number of glue injection holes 8 can be determined according to the size of the flange, specifically according to Table 2:

[0035] Table 2 Number of Glue Injection Holes for Flanges with Different Specifications

[0036]

[0037] The foregoing has shown and described the basic principles, main features and advantages of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above embodiments, and the above embodiments and the descriptions in the specification are only preferred examples of the present utility model, which are not used to limit the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents.

Claims

1. A flange fixture for emergency leak stoppage and plugging, comprising a semi-ring a (1) and a semi-ring b (2), characterized in that, The two ends of the semi-ring a (1) and the semi-ring b (2) are connected by mortise and tenon joints and wrap the flange (14) around the outer diameter. Clamping strips (11) are arranged along the inner sides of the semi-ring a (1) and the semi-ring b (2) along the ring edge. The semi-ring a (1) and the semi-ring b (2) are evenly provided with no less than two glue injection holes (8) along the circumferential direction. The glue injection holes (8) penetrate through the clamping strips (11). Glue injection stop valves (3) are threadedly connected to the outer sides of the semi-ring a (1) and the semi-ring b (2) through the glue injection holes (8). Sliding grooves (7) that are symmetrically arranged up and down are opened on the outer walls at both ends of the semi-ring a (1) and the semi-ring b (2). Threaded holes (12) communicating with the end faces are opened in the sliding grooves (7). Fastening bolts (6) are threadedly connected in the threaded holes (12). Positioning platforms (9) are arranged along the ring edge at the top and bottom of the inner sides of the semi-ring a (1) and the semi-ring b (2). Annular grooves (4) are arranged between the positioning platforms (9) and the clamping strips (11).

2. The flange clamp for emergency leakage stoppage according to claim 1, characterized in that, The end face of the annular groove (4) is rectangular, and packing (5) is arranged in the annular groove (4) and protrudes outwards.

3. The flange clamp for emergency repair and leakage stoppage according to claim 2, wherein, The distance between the positioning platforms (9) at the top and bottom of the inner sides of the semi-ring a (1) and the semi-ring b (2) is less than the gap between the two connecting flanges.

4. The flange fixture for emergency repair and leakage stoppage according to claim 3, characterized in that, Clamping platforms one (10) are arranged at both ends of the semi-ring a (1), and clamping platforms two (13) are arranged at both ends of the semi-ring b (2). The clamping platforms one (10) and the clamping platforms two (13) are in clamping fit.

5. The flange clamp for emergency rescue and leakage plugging according to claim 4, characterized in that, The cross-sections of the clamping platforms one (10) and the clamping platforms two (13) are both Z-shaped, and the inclined surface angles of the clamping platforms one (10) and the clamping platforms two (13) are both set to 3 - 10°.

6. The flange fixture for emergency rescue and leakage stoppage according to claim 5, wherein, A soft metal sheet is arranged between the inclined surfaces when the clamping platforms one (10) and the clamping platforms two (13) are clamped.

7. The flange clamp for emergency leak stoppage according to claim 1, characterized in that, The fastening bolts (6) are internal hexagon concave bolts.

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