Leak-proof BS type blind flange

Abstract

The invention discloses a leakproof BS type blind plate flange, and relates to the field of flanges, the leakproof BS type blind plate flange comprises a blind plate flange, a pipeline and a pipeline flange, the blind plate flange comprises a blind plate main body and a circular bulge, an air cushion is fixedly connected to the outer edge of the front end of the circular bulge, and a buffer structure is movably mounted in the middle of the front end of the circular bulge; the face, away from the circular protrusion, of the buffering structure is fixedly connected with an arc-shaped cover. The air cushion, the buffering structure and the arc-shaped cover are additionally arranged at the front end of the circular protrusion, when water flow in a pipeline is increased sharply, impact on water is buffered under the action of the arc-shaped cover and the buffering structure, the stability of connection between the blind flange and a pipeline flange is guaranteed, meanwhile, the arc-shaped cover and the buffering structure retract when being impacted by the water flow, and the water flow is prevented from being damaged. And the air cushion is extruded and attached to the front face of the circular protrusion and the inner wall of the pipeline, the sealing effect of the joint of the inner wall of the pipeline and the circular protrusion is greatly improved, and liquid in the pipeline is prevented from leaking.

Description

Technical Field

[0001] This invention relates to the field of flanges, and particularly to a leak-proof BS type blind flange. Background Technology

[0002] A blind flange, also known as a blind plate, is a type of flange connection. Essentially, it's a flange without a central hole. Its functions include sealing the end of a pipe and facilitating the removal of debris during maintenance. In terms of sealing, it has the same function as end caps and pipe caps. However, end caps cannot be removed, while blind flanges are bolted and easily disassembled. Blind flanges are made of materials such as carbon steel, alloy steel, stainless steel, and plastic.

[0003] Existing blind flanges are all connected to the pipe flanges by bolts. However, their sealing performance is limited. When the water flow inside the pipe surges, it will cause a certain impact force on the blind flange, which will cause vibration between the blind flange and the pipe flange. Over time, gaps are likely to appear between the blind flange and the pipe flange, leading to liquid leakage when the water flow inside the pipe surges. Summary of the Invention

[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides a leak-proof BS type blind flange to solve the problems existing in the background art.

[0005] This invention provides the following technical solution: a leak-proof BS type blind flange, comprising a blind flange, a pipe, and a pipe flange. The pipe flange is welded to the end of the pipe. The blind flange is bolted to the side of the pipe. The blind flange includes a blind flange body and a circular protrusion. The circular protrusion is integrally welded to the front center of the blind flange body. An air cushion is fixedly connected to the outer edge of the front end of the circular protrusion. A buffer structure is movably installed at the front center of the circular protrusion. An arc-shaped cover is fixedly connected to the side of the buffer structure away from the circular protrusion.

[0006] Preferably, an annular groove is provided at the bottom of the side of the circular protrusion near the blind plate body, and a rubber pad is embedded in the groove. One side of the rubber pad is in contact with the blind plate body and has the same structure as the blind plate body.

[0007] Preferably, the circular protrusion has an annular groove in the middle, and a sealing ring is elastically fitted inside the groove.

[0008] Preferably, the buffer structure includes an annular ring, support rods, a connecting seat, arc-shaped pieces, and a limiting ring. Four support rods are connected to the inner side of the annular ring, and the other ends of the four support rods are connected to the connecting seat. The connecting seat and the annular ring are coaxially arranged so that the four support rods form a cross-shaped structure. Two arc-shaped pieces are connected to the back of the connecting seat. The two arc-shaped pieces are stacked alternately to form a cross-shaped structure. A limiting ring is movably inserted into the end of each of the two arc-shaped pieces, and the limiting ring is fixedly installed in front of the circular protrusion.

[0009] Preferably, the arc-shaped cover is fixedly mounted on the front of the connecting seat by a hollow rod.

[0010] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0011] This invention adds an air cushion to the front end of the circular protrusion, which is then contacted by a buffer structure and an arc-shaped cover. When the water flow in the pipeline surges, the arc-shaped cover and buffer structure buffer the impact of the water, greatly reducing the impact force on the arc-shaped cover during the surge. This significantly reduces the vibration between the blind flange and the pipeline flange, ensuring the stability of the connection between them. Simultaneously, when the arc-shaped cover and buffer structure are impacted by the water flow, they retract, pressing the air cushion downwards and squeezing it against the front of the circular protrusion and the inner wall of the pipeline. This greatly improves the sealing effect at the connection between the pipeline's inner wall and the circular protrusion, preventing liquid leakage. Furthermore, the greater the water flow impact, the greater the retraction pressure of the arc-shaped cover and buffer structure, resulting in greater pressure on the air cushion and thus greater contact force with the blind flange and the circular protrusion, leading to a better sealing effect. This prevents high-speed water flow from leaking through the flange connection, allowing the sealing effect to be adjusted according to the magnitude of the surge, avoiding the buffer structure always maintaining a high-intensity retraction state, and extending the service life of the buffer structure. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the blind flange installation structure of the present invention.

[0013] Figure 2 This is a schematic diagram of the exploded structure of the blind flange of the present invention.

[0014] Figure 3 This is a schematic diagram of the blind flange structure of the present invention.

[0015] Figure 4 This is a schematic cross-sectional view of the blind flange installation structure of the present invention.

[0016] Figure 5 This is a schematic cross-sectional view of the blind flange installation structure of the present invention.

[0017] Figure 6This is a schematic diagram of the buffer structure of the present invention.

[0018] The attached figures are labeled as follows: 1. Blind flange; 2. Pipe; 3. Pipe flange; 4. Blind flange body; 5. Circular protrusion; 6. Rubber gasket; 7. Sealing ring; 8. Air cushion; 9. Buffer structure; 91. Annular ring; 92. Support rod; 93. Connecting seat; 94. Arc-shaped piece; 95. Limiting ring; 10. Arc-shaped cover. Detailed Implementation

[0019] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby providing a clearer and more explicit definition of the scope of protection of the present invention.

[0020] This invention provides a leak-proof BS type blind flange, such as... Figure 1-6 As shown, it includes a blind flange 1, a pipe 2, and a pipe flange 3. The pipe flange 3 is welded to the end of the pipe 2. The blind flange 1 is bolted to the side of the pipe 2. The blind flange 1 includes a blind flange body 4 and a circular protrusion 5. The circular protrusion 5 is integrally welded to the front center of the blind flange body 4. An air cushion 8 is fixedly connected to the outer edge of the front end of the circular protrusion 5. A buffer structure 9 is movably installed in the front center of the circular protrusion 5. An arc-shaped cover 10 is fixedly connected to the side of the buffer structure 9 away from the circular protrusion 5.

[0021] An air cushion 8 is added to the front end of the circular protrusion 5, and the air cushion 8 is in contact with the set buffer structure 9 and arc-shaped cover 10. When the water flow in the pipe surges, the impact of the water is buffered by the arc-shaped cover 10 and the buffer structure 9, which greatly reduces the impact force on the arc-shaped cover 10 when the water flow surges, thereby greatly reducing the vibration between the blind flange 1 and the pipe flange 3, ensuring the stability of the connection between the blind flange 1 and the pipe flange 3. At the same time, when the arc-shaped cover 10 and the buffer structure 9 are impacted by the water flow, they retract, causing the buffer structure 9 to press down on the air cushion 8, so that the air cushion 8 is squeezed and adhered to the front of the circular protrusion 5 and the inner wall of the pipe 2, which greatly improves the sealing effect at the connection between the inner wall of the pipe 2 and the circular protrusion 5, preventing liquid leakage in the pipe.

[0022] Furthermore, the greater the water flow impact, the greater the retraction pressure of the arc-shaped cover 10 and the buffer structure 9, which in turn increases the pressure exerted by the arc-shaped cover 10 and the buffer structure 9 on the air cushion 8. Consequently, the contact force with the blind flange 1 and the circular protrusion 5 is greater, resulting in a better sealing effect. This prevents high-speed water flow from leaking out of the flange connection, allowing the sealing effect to be adjusted accordingly with the increase in size. It also prevents the buffer structure 9 from always maintaining a high-strength retraction state, thereby improving the service life of the buffer structure 9.

[0023] Furthermore, an annular groove is provided at the bottom of the side of the circular protrusion 5 near the blind flange body 4, and a rubber gasket 6 is embedded inside the groove. One side of the rubber gasket 6 is attached to the blind flange body 4 and has the same structure as the blind flange body 4. The rubber gasket 6 is used to seal the connection gap between the blind flange body 4 and the pipe 2 to prevent liquid leakage in the pipe. At the same time, the rubber is elastic, which can reduce the impact force of the surge water flow on the blind flange 1 and improve the stability of the connection between the pipe 2 and the blind flange body 4.

[0024] Furthermore, an annular groove is provided in the center of the circular protrusion 5, and a sealing ring 7 is elastically fitted inside the groove. The sealing ring 7 is used to increase the sealing effect of the circular protrusion 5 at the connection with the inner wall of the pipe, and to prevent liquid leakage in the pipe.

[0025] As one example, such as Figure 6 As shown, the buffer structure 9 includes an annular ring 91, support rods 92, connecting seat 93, arc-shaped pieces 94, and limiting rings 95. Four support rods 92 are connected to the inner side of the annular ring 91, and the other ends of the four support rods 92 are connected to the connecting seat 93. The connecting seat 93 and the annular ring 91 are coaxially arranged so that the four support rods 92 form a cross-shaped structure. The arc-shaped cover 10 is fixedly installed in front of the connecting seat 93 by a hollow rod. Two arc-shaped pieces 94 are connected to the back of the connecting seat 93. The two arc-shaped pieces 94 are staggered to form a cross-shaped structure. The arc-shaped pieces 94 are made of spring steel. A limiting ring 95 is movably inserted into the end of each of the two arc-shaped pieces 94, and the limiting ring 95 is fixedly installed in front of the circular protrusion 5.

[0026] Furthermore, the air cushion 8 is made of waterproof and corrosion-resistant materials, such as the vinyl fiber air cushion of the LK-XJD-P model of Leyneco, rubber air cushion, etc.

[0027] Furthermore, the annular ring 91, support rod 92, and connecting seat 93 are made of titanium alloy. Titanium alloy has high corrosion resistance, hardness, and lightweight properties, which reduces the weight of the buffer structure 9 while preventing it from being corroded by the liquid in the pipe. It can also ensure that the air cushion 8 is compressed, greatly reducing the impact of the liquid inside the pipe on the buffer structure 9.

[0028] Furthermore, the arc-shaped cover 10 has an umbrella-like structure. When water flows down the umbrella-like structure, the impact force of the water flow is evenly distributed, greatly reducing the impact force of the water flow. At the same time, the arc-shaped cover 10 is subjected to uniform force, which causes the impact structure 9 to retract and press down on the air cushion 8 evenly, improving the compression effect of the air cushion 8. This ensures that the air cushion 8 has the same adhesion force to all parts of the inner wall of the pipe, further improving the sealing effect. The arc-shaped cover 10 is made of polyethylene plastic material, and the titanium alloy material has high corrosion resistance and lightweight performance characteristics, reducing the weight of the arc-shaped cover 10 while avoiding corrosion by the liquid in the pipe, greatly reducing the impact of the liquid inside the pipe on the arc-shaped cover 10.

[0029] The working principle of this invention is as follows: When the water flow inside the pipe surges, the water flow impacts the arc-shaped cover 10. Under the action of the arc-shaped cover 10, the impact force of the water flow is evenly distributed, and under the action of the buffer structure 9, the impact is buffered, greatly reducing the impact force caused by the surge of water flow on the arc-shaped cover 10. This greatly reduces the vibration generated between the blind flange 1 and the pipe flange 3, ensuring the stability of the connection between the blind flange 1 and the pipe flange 3. At the same time, the arc-shaped cover 10 retracts under the impact of the surge of water flow, causing the arc-shaped cover 10 to press down on the buffer structure 9. At this time, the buffer structure 9 is under pressure, causing the arc-shaped piece 94 to bend downward in the direction of the circular protrusion 5. This causes the annular ring 91, the support rod 92, and the connecting seat 93 to also move in the direction of the circular protrusion 5. This causes the annular ring 91 to press down on the air cushion 8, causing the air cushion 8 to be squeezed and adhered to the front of the circular protrusion 5 and the inner wall of the pipe 2. This greatly improves the sealing effect at the connection between the inner wall of the pipe 2 and the circular protrusion 5, preventing liquid leakage from the pipe.

[0030] Several points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection" and "linkage" should be interpreted broadly, and can be mechanical or electrical connection, or internal connection between two components, or direct connection. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationship. When the absolute position of the described object changes, the relative positional relationship may change.

[0031] The above description is only a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. Any equivalent modifications or changes made by those skilled in the art based on the content disclosed in the present invention should be included within the scope of protection set forth in the claims.

Claims

1. A leak-proof BS type blind flange, comprising a blind flange (1), a pipeline (2), and a pipeline flange (3), the pipeline flange (3) being welded to the end of the pipeline (2), and the blind flange (1) being assembled on the side of the pipeline (2) by bolts, characterized in that: The blind plate flange (1) includes a blind plate body (4) and a circular protrusion (5), the middle of the front of the blind plate body (4) is integrally welded with the circular protrusion (5), the outer edge of the front end of the circular protrusion (5) is fixedly connected with an air cushion (8), the middle of the front end of the circular protrusion (5) is movably installed with a buffer structure (9), and the side of the buffer structure (9) away from the circular protrusion (5) is fixedly connected with an arc-shaped cover (10).

2. A leak-proof BS-type blind flange according to claim 1, characterized in that: The bottom of the side of the circular protrusion (5) close to the blind plate body (4) is provided with an annular clamping groove, and a rubber pad (6) is embedded and installed in the clamping groove, and the side of the rubber pad (6) is attached to the blind plate body (4) and has the same structure as the blind plate body (4).

3. A leak-proof BS blind plate flange according to claim 1, characterized in that: The middle of the circular protrusion (5) is provided with an annular groove, and a sealing ring (7) is elastically sleeved in the groove.

4. A leak-proof BS blind plate flange according to claim 1, characterized in that: The buffer structure (9) includes an annular ring (91), a support rod (92), a connecting seat (93), an arc-shaped sheet (94) and a limiting ring (95), the inner side of the annular ring (91) is connected with four support rods (92), the other ends of the four support rods (92) are connected with the connecting seat (93), the connecting seat (93) is coaxially arranged with the annular ring (91) to form a cross-shaped structure with the four support rods (92), the back of the connecting seat (93) is connected with two arc-shaped sheets (94), the two arc-shaped sheets (94) are staggered and formed into a cross-shaped structure, the ends of the two arc-shaped sheets (94) are movably inserted with a limiting ring (95), and the limiting ring (95) is fixedly installed on the front of the circular protrusion (5).

5. A leak-proof BS blind plate flange according to claim 1, characterized in that: The arc-shaped cover (10) is fixedly installed on the front of the connecting seat (93) through a hollow rod.

6. A leak-proof BS-type blind flange according to claim 4, characterized in that: The arc-shaped sheet (94) is made of spring steel material.

7. A leak-proof BS blind plate flange according to claim 1, characterized in that: The air cushion (8) is made of waterproof and corrosion-resistant material.

8. A leak-proof BS-type blind flange according to claim 4, characterized in that: The annular ring (91), the support rod (92) and the connecting seat (93) are made of titanium alloy material.

9. A leak-proof BS-type blind flange according to claim 5, characterized in that: The arc-shaped cover (10) is in an umbrella-shaped structure, and the arc-shaped cover (10) is made of polyethylene plastic material.

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