High-strength composite flange

Abstract

The utility model relates to the technical field of flanges, and discloses a high-strength composite flange which comprises a positioning mechanism and two connecting flange plates, each connecting flange plate comprises a flange plate body, an annular sealing groove is formed in the outer surface of each flange plate body, and a plurality of mounting holes are formed in the position, close to the edge, of the surface of the front side of each flange plate body; the positioning mechanism comprises a rubber positioning belt, a plurality of upper fixing holes are formed in the upper end face of the rubber positioning belt, first internal thread rings are fixedly arranged in the upper fixing holes, a plurality of lower fixing grooves are formed in the inner bottom face of the rubber positioning belt, and second internal thread rings are fixedly arranged in the lower fixing grooves. According to the flange plate, sealing protection can be achieved on the fastening bolts, connection protection can be achieved on a gap between the two flange plate bodies, the problem of corrosion caused by long-time use is avoided, the strength of the flange is improved, and the service life of the flange is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of flanges, in particular to a high-strength composite flange. Background Art

[0002] A flange is a mechanical connection device used to connect the ends of two pipes or devices. It usually has a disc-shaped outer shape and consists of two symmetrical flange plates. Each flange plate has some holes for bolt fixation. When the two flange plates are aligned, they can be tightly connected together by bolts and nuts to form a sealed connection.

[0003] Most of the connection methods of flanges are realized through bolts. The specific operation method is to place two flange plates at the ends of the pipes or devices to be connected. Ensure that there is no gap between the flange plates and the hole positions are aligned. Insert bolts into the flange plates and place the nuts of the bolts on the other side of the bolts. The corresponding number of bolts should be inserted into the holes on each flange plate. Use a wrench, spanner or other tools to rotate the bolts and nuts one by one and gradually tighten them. However, after being fixed by bolts, the connection gaps between the bolts and between the bolts and the flanges are often exposed to the air. After long-term use, it is very easy to be corroded and damaged due to rainwater or other reasons, which will affect the stability of the bolt connection, and then affect the normal use of the equipment connected by the flange, affect the strength of the flange, and reduce the service life.

[0004] Therefore, those skilled in the art have provided a high-strength composite flange to solve the problems raised in the above background art. Content of the Utility Model

[0005] The purpose of the utility model is to solve the disadvantages existing in the prior art, and a high-strength composite flange is proposed. The utility model can realize the sealing protection of the fastening bolts and at the same time can realize the connection protection of the gap between the two flange plate bodies, thus avoiding the problem of corrosion due to long-term use, thereby increasing the strength and service life of the flange.

[0006] To achieve the above purpose, the utility model provides the following technical solutions:

[0007] A high-strength composite flange, including a positioning mechanism and two connecting flange plates. The connecting flange plates include flange plate bodies. An annular sealing groove is formed on the outer surface of the flange plate body, and a plurality of mounting holes are formed on the front surface of the flange plate body near the edge;

[0008] The positioning mechanism includes a rubber positioning belt. Multiple upper fixing holes are formed in the upper end surface of the rubber positioning belt. A first internal thread ring is fixedly arranged inside each of the multiple upper fixing holes. Multiple lower fixing grooves are formed in the inner bottom surface of the rubber positioning belt. A second internal thread ring is fixedly arranged inside each of the multiple lower fixing grooves. A fastening bolt is threadedly sleeved inside the body of the first internal thread ring. A sealing washer is movably sleeved on the bolt body of the fastening bolt above the first internal thread ring. A sealing ring strip is fixedly arranged at the front opening of the rubber positioning belt;

[0009] Through the above technical solution, the utility model can not only achieve the sealing protection of the fastening bolt but also achieve the connection protection of the gap between the two flange bodies, thereby avoiding the problem of corrosion due to long-term use, and increasing the flange strength and service life.

[0010] Further, the flange body is arranged in a spiral shape, and a through hole is formed at the center of the front side of the flange body;

[0011] Through the above technical solution, the spiral shape facilitates the installation of the rubber positioning belt.

[0012] Further, the flange body includes an outer connection layer, a second lining layer is arranged inside the outer connection layer, a first lining layer is arranged inside the second lining layer, and a lining layer is arranged inside the first lining layer;

[0013] Through the above technical solution, the outer connection layer is made of stainless steel material, the first lining layer is made of PTFE material, the second lining layer is made of ceramic material, and the lining layer is made of carbon steel material.

[0014] Further, the first internal thread ring and the second internal thread ring are perpendicular and on the same straight line;

[0015] Through the above technical solution, it is convenient to install the fastening bolt.

[0016] Further, the two connecting flanges are arranged in a fitting manner. The rubber positioning belt is wound around the edges of the two connecting flanges and is fixedly connected by sequentially passing the fastening bolt through the first internal thread ring, the mounting hole, and the second internal thread ring;

[0017] Through the above technical solution, this is the connection method of the two flanges.

[0018] Further, the sealing ring strip is located inside the sealing groove;

[0019] Through the above technical solution, it is used to increase the sealing performance.

[0020] Further, the rubber positioning belt is made of fluororubber material, and the first internal thread ring and the second internal thread ring are both made of stainless steel material;

[0021] Through the above technical solution, the fluororubber material has good chemical corrosion resistance, good heat resistance, and good oil resistance.

[0022] The utility model has the following beneficial effects:

[0023] By setting the flange in a spiral shape, it is convenient and fast to install the strip-shaped positioning mechanism. And during this process, the gaps between the installed bolts and the two connecting flange plates are all located inside the rubber positioning belt. At the same time, the bolts further increase the sealing ring through the sealing washers, and the rubber positioning belt is clamped and arranged inside the sealing groove through the sealing ring strip, further increasing the sealing performance. Furthermore, it greatly protects the gaps between the bolts and the two flanges, making the flange set by the utility model have higher sealing performance, more durability, and longer service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 Is an axonometric schematic diagram of the utility model;

[0025] Figure 2 Is an axonometric schematic diagram of a single flange plate of the utility model;

[0026] Figure 3 Is an axonometric schematic diagram of the positioning mechanism of the utility model in an unfolded state;

[0027] Figure 4 Is a front sectional schematic diagram of the positioning mechanism of the utility model in an unfolded state;

[0028] Figure 5 Is a schematic diagram of the structure of the flange plate body of the utility model.

[0029] LEGEND DESCRIPTION:

[0030] 1. Positioning mechanism; 2. Connecting flange plate; 101. Rubber positioning belt; 102. Fastening bolt; 103. Sealing washer; 104. First internal thread ring; 105. Second internal thread ring; 106. Lower fixing groove; 107. Upper fixing hole; 108. Sealing ring strip; 201. Through hole; 202. Flange plate body; 203. Mounting hole; 204. Sealing groove; 20201. Inner lining layer; 20202. First sandwich layer; 20203. Second sandwich layer; 20204. Outer connection layer. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0032] Embodiment

[0033] Referring to Figures 1-5 , an embodiment provided by the present utility model: a high-strength composite flange, including a positioning mechanism 1 and two connecting flange plates 2. The connecting flange plate 2 includes a flange plate body 202. An annular sealing groove 204 is formed on the outer surface of the flange plate body 202, and a plurality of mounting holes 203 are formed on the front surface of the flange plate body 202 near the edge.

[0034] Among them, the positioning mechanism 1 includes a rubber positioning belt 101. A plurality of upper fixing holes 107 are formed on the upper end surface of the rubber positioning belt 101. A first internal thread ring 104 is fixedly arranged inside each of the plurality of upper fixing holes 107. The second internal thread ring 105 and the first internal thread ring 104 have double threads, which play a role in increasing firmness.

[0035] On the inner bottom surface of the rubber positioning belt 101, a plurality of lower fixing grooves 106 are formed. A second internal thread ring 105 is fixedly arranged inside each of the plurality of lower fixing grooves 106. A fastening bolt 102 is threadedly sleeved inside the ring body of the first internal thread ring 104. A sealing washer 103 is movably sleeved on the bolt body of the fastening bolt 102 located above the first internal thread ring 104. A sealing ring strip 108 is fixedly arranged at the front opening of the rubber positioning belt 101. The present utility model can achieve sealing protection for the fastening bolt 102 while also achieving connection protection for the gap between the two flange plate bodies 202, thereby avoiding the problem of corrosion due to long-term use, and thus increasing the flange strength and service life.

[0036] The flange plate body 202 is arranged in a spiral shape. A through hole 201 is formed at the center of the front side of the flange plate body 202. The spiral shape facilitates the installation of the rubber positioning belt 101. The flange plate body 202 includes an outer connection layer 20204. A second sandwich layer 20203 is arranged inside the outer connection layer 20204. A first sandwich layer 20202 is arranged inside the second sandwich layer 20203. A lining layer 20201 is arranged inside the first sandwich layer 20202. The outer connection layer 20204 is made of stainless steel material. The first sandwich layer 20202 is made of PTFE material. The second sandwich layer 20203 is made of ceramic material. The lining layer 20201 is made of carbon steel material. The first internal thread ring 104 and the second internal thread ring 105 are perpendicular and on the same straight line, which is convenient for installing the fastening bolt 102.

[0037] Two connecting flanges 2 are arranged in a fitting manner. The rubber positioning belt 101 is wound around the edges of the two connecting flanges 2 and is fixedly connected by sequentially passing the fastening bolts 102 through the first internal thread ring 104, the mounting holes 203, and the second internal thread ring 105. This is the way of connecting two flanges. The sealing ring strip 108 is located inside the sealing groove 204 and is used to enhance the sealing performance. The rubber positioning belt 101 is made of fluororubber material, and both the first internal thread ring 104 and the second internal thread ring 105 are made of stainless steel material. The fluororubber material has good chemical corrosion resistance, good heat resistance, and good oil resistance.

[0038] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A high-strength composite flange, comprising a positioning mechanism (1) and two connecting flanges (2), characterized in that: The connecting flange (2) comprises a flange body (202), an annular sealing groove (204) is provided on the outer surface of the flange body (202), and a plurality of mounting holes (203) are provided on the front surface of the flange body (202) near the edge; The positioning mechanism (1) comprises a rubber positioning belt (101), the upper end surface of the rubber positioning belt (101) is provided with a plurality of upper fixing holes (107), the interior of each of the plurality of upper fixing holes (107) is fixedly provided with a No. 1 internal threaded ring (104), the inner bottom surface of the rubber positioning belt (101) is provided with a plurality of lower fixing grooves (106), the interior of each of the plurality of lower fixing grooves (106) is fixedly provided with a No. 2 internal threaded ring (105), a fastening bolt (102) is provided on the inner threaded sleeve of the ring body of the No. 1 internal threaded ring (104), a sealing gasket (103) is provided on the bolt body of the fastening bolt (102) located at the upper end of the No. 1 internal threaded ring (104), and a sealing ring strip (108) is fixedly provided at the front opening of the rubber positioning belt (101).

2. The high-strength composite flange according to claim 1, characterized in that: The flange body (202) is arranged in a spiral shape, and a through hole (201) is provided at the center of the front side of the flange body (202).

3. The high-strength composite flange according to claim 1, characterized in that: The flange body (202) comprises an outer connecting layer (20204), a second interlining layer (20203) is arranged on the inner side of the outer connecting layer (20204), a first interlining layer (20202) is arranged on the inner side of the second interlining layer (20203), and an inner lining layer (20201) is arranged on the inner side of the first interlining layer (20202).

4. The high-strength composite flange according to claim 1, characterized in that: The first internal thread ring (104) and the second internal thread ring (105) are vertically located on the same straight line.

5. The high-strength composite flange according to claim 1, characterized in that: The two connecting flanges (2) are arranged in close proximity, the rubber positioning belt (101) is wound around the edges of the two connecting flanges (2), and is fixedly connected by fastening bolts (102) that pass through the No. 1 internal thread ring (104), the mounting hole (203), and the No. 2 internal thread ring (105) in sequence.

6. The high-strength composite flange according to claim 1, characterized in that: The sealing ring strip (108) is located inside the sealing groove (204).

7. The high-strength composite flange according to claim 1, characterized in that: The rubber positioning belt (101) is made of fluororubber material, and the No. 1 internal thread ring (104) and the No. 2 internal thread ring (105) are both made of stainless steel material.

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