Pipeline connecting flange

Abstract

The utility model discloses a pipeline connecting flange which comprises a first flange body and a second flange body matched with the first flange body, a concentric convex ring is arranged on the end face of the first flange body, a concentric annular groove matched with the convex ring is formed in the end face of the second flange body, and first screw holes matched with each other are formed in the periphery of the first flange body and the periphery of the second flange body. After the first flange and the second flange are connected through bolts and the first screw holes, the convex ring is inserted into the annular groove, a plurality of second screw holes are formed in the outer wall of the convex ring, the second screw holes are located in the middles between the adjacent first screw holes, a plurality of third screw holes matched with the second screw holes are formed in the outer wall of the second flange, and the third screw holes are located in the middles between the adjacent second screw holes. A screw rod is in threaded connection in the third screw hole, and the inner end of the screw rod can be connected into the second screw hole in the convex ring by screwing the screw rod. The first flange and the second flange are connected through the bolts and then are fixed through the screws, double fastening is achieved, the connecting strength is improved, and meanwhile the sealing performance is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to flange technical field, concretely is a pipeline connecting flange. BACKGROUND

[0002] Pipeline connecting flan is the key component that pipeline and valve, equipment or other pipeline are connected. It provides a sealed and structural stable connection, so that the pipeline system can be safely, effectively run. The following defects exist when traditional flange connects: single sealing gasket is easy to produce creep failure under temperature, pressure fluctuation;Bolt pre-tightening force decays with time, resulting in loose connection;Bolt is easy to occur self-loosening under vibration condition. UTILITY MODEL CONTENT

[0003] In view of the deficiency of prior art, the utility model provides a pipeline connecting flange to solve the problem of sealing performance check and bolt easy loosening mentioned in above background art.

[0004] To solve the above technical problem, the utility model provides the following technical scheme:

[0005] A pipeline connecting flange, including first flange, with the second flan that matches first flange, the end surface of first flange is equipped with the convex ring of concentricity, the end surface of second flan is equipped with the annular groove of concentricity and matches the convex ring, the periphery of first flange and second flan is equipped with the first screw hole that matches, after first flange and second flan are connected through bolt, first screw hole, the convex ring is inserted in the annular groove, the outer wall of convex ring is equipped with a plurality of second screw holes, and second screw hole is located in the middle between adjacent first screw hole, and the outer wall of second flan is equipped with a plurality of third screw holes matched with second screw hole, and third screw hole is located in the middle between adjacent second screw hole, and the third screw hole is connected with screw rod in the thread, and the screw rod can be connected to the second screw hole on the convex ring in the inner end.

[0006] Preferably, the end surface of the first flange is provided with a concentric first sealing groove, and the first sealing groove is located at the periphery of the convex ring.

[0007] Through the above technical scheme, by setting the rubber sealing ring, when the first flange and the second flange are connected, the sealing property can be improved.

[0008] Preferably, the end surface of the second flange is provided with a concentric second sealing groove, and the second sealing groove is located at the inner circle of the annular groove.

[0009] Through the above technical scheme, by setting the expanded graphite sealing ring, it can expand when heated, and further play the sealing property.

[0010] Preferably, the cross section of the rubber sealing ring and the expanded graphite sealing ring is trapezoidal.

[0011] By using the above technical solution, the cross-sections of both the rubber sealing ring and the expanded graphite sealing ring are set to trapezoidal, and the cross-sections of the first sealing groove and the second sealing groove are also trapezoidal, which can prevent the rubber sealing ring and the expanded graphite sealing ring from falling off.

[0012] Preferably, the bottom surface of the convex ring is provided with a first capsule, which is filled with epoxy resin, and the bottom of the annular groove is provided with a second capsule, which is filled with a curing agent.

[0013] With the above technical solution, when the convex ring is inserted into the annular groove, the first capsule and the second capsule are ruptured under pressure, thereby releasing epoxy resin and curing agent to bond the convex ring and the annular groove together, improving the connection strength and sealing performance.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] After the first and second flanges are connected by bolts, the convex ring is inserted into the annular groove. Then, by tightening the screw, the inner end of the screw can be connected to the second screw hole on the convex ring, thereby further fixing the first and second flanges together and achieving double fastening. Moreover, the cooperation between the convex ring and the annular groove improves the connection strength and also enhances the sealing performance. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the present invention;

[0017] Figure 2 This is a top view of the first flange;

[0018] Figure 3 This is a top view of the second flange;

[0019] Figure 4 This is a cross-sectional view of the convex ring and the annular groove.

[0020] Figure 5 This is a cross-sectional view of the present invention;

[0021] Figure 6 This is a schematic diagram showing the connection between the first and second flanges;

[0022] In the diagram: 1-First flange, 2-Second flange, 3-convex ring, 4-Annular groove, 5-First screw hole, 6-Second screw hole, 7-Screw, 8-Rubber sealing ring, 9-Expanded graphite sealing ring, 10-First capsule, 11-Epoxy resin, 12-Second capsule, 13-Curing agent. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Example 1

[0025] Please see Figures 1-5 A pipe connection flange includes a first flange 1 and a second flange 2 that matches the first flange. The end face of the first flange 1 is provided with a concentric raised ring 3, and the end face of the second flange 2 is provided with a concentric annular groove 4 that matches the raised ring. The outer periphery of the first flange 1 and the second flange 2 is provided with matching first threaded holes 5. After the first flange 1 and the second flange 2 are connected by bolts and the first threaded holes 5, the raised ring 3 is inserted into the annular groove 4. The outer wall of the raised ring 3 is provided with a plurality of second threaded holes 6, which are located in the middle between adjacent first threaded holes 5. The outer wall of the second flange 2 is provided with a plurality of third threaded holes that match the second threaded holes, which are located in the middle between adjacent second threaded holes 6. When the first flange 1 and the second flange 2 overlap, and the first threaded holes on the first flange 1 are aligned with the first threaded holes on the second flange 2, and then the first flange 1 and the second flange 2 are fixed by bolts, the raised ring 3 is inserted into the annular groove 4, and the second threaded holes 6 and the corresponding third threaded holes are on the same straight radius line. The third screw hole is internally threaded with a screw rod 7. After the first flange 1 and the second flange 2 are fixed by bolts, turning the screw rod 7 will connect its inner end to the second screw hole 6 on the convex ring 3.

[0026] The first flange 1 has a concentric first sealing groove on its end face, located around the outer edge of the convex ring 3, and contains a rubber sealing ring 8. The second flange 2 has a concentric second sealing groove on its end face, located within the inner ring of the annular groove 4, and contains an expanded graphite sealing ring 9. By using the rubber sealing ring 8, the sealing performance is improved when the first flange 1 and the second flange 2 are connected. The expanded graphite sealing ring 9 expands when heated, further enhancing the sealing performance. Furthermore, when the first flange 1 and the second flange 2 are connected, the combined effect of the rubber sealing ring 8 and the expanded graphite sealing ring 9 significantly improves the sealing performance between the two flanges.

[0027] Both the rubber sealing ring 8 and the expanded graphite sealing ring 9 have trapezoidal cross-sections. By setting the cross-sections of both the rubber sealing ring and the expanded graphite sealing ring to trapezoidal shapes, and simultaneously setting the cross-sections of the first sealing groove and the second sealing groove to trapezoidal shapes, the rubber sealing ring and the expanded graphite sealing ring can be prevented from falling off.

[0028] The installation method of this utility model is as follows:

[0029] The first and second flanges are secured with bolts. After the convex ring is inserted into the annular groove, the threaded rod is tightened so that its inner end connects to the second threaded hole on the convex ring, further securing the first and second flanges and achieving double fastening. Furthermore, the cooperation between the convex ring and the annular groove improves the sealing performance. Next, the opposite sides of the first and second flanges are fixedly connected (e.g., welded) to the two pipes, thus completing the installation.

[0030] Example 2

[0031] Based on Example 1, the bottom surface of the convex ring 3 is provided with a first capsule 10, which is filled with epoxy resin 11, and the bottom of the annular groove 4 is provided with a second capsule 12, which is filled with curing agent 13.

[0032] When the protruding ring 3 is inserted into the annular groove 4, the first capsule 10 and the second capsule 12 are ruptured under pressure, thereby releasing the epoxy resin 11 and the curing agent 13 to bond the protruding ring 3 and the annular groove 4 together, improving the connection strength and sealing performance.

[0033] The linear vibrator described in this embodiment, also known as a linear vibratory machine, is a commonly used vibration device. It mainly consists of a vibratory motor, an exciter, damping springs, and a base. During operation, the vibratory motor generates rotational torque, which is transmitted to the exciter through a transmission device. The exciter converts the rotational motion into linear vibration, causing the machine body and the material to vibrate at the same frequency and amplitude, thus achieving functions such as material conveying, screening, lifting, and compaction. Linear vibrators are existing technology and will not be described in detail in this embodiment.

[0034] It should be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0035] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A pipe connection flange, characterized in that: The first flange (1) and the second flange (2) that matches the first flange are provided. The end face of the first flange (1) is provided with a concentric convex ring (3). The end face of the second flange (2) is provided with a concentric annular groove (4) that matches the convex ring. The outer periphery of the first flange (1) and the second flange (2) is provided with matching first screw holes (5). After the first flange (1) and the second flange (2) are connected by bolts and first screw holes (5), the convex ring (3) is inserted into the annular groove (4). The outer wall of the convex ring (3) is provided with multiple second screw holes (6). The second screw holes (6) are located in the middle between adjacent first screw holes (5). The outer wall of the second flange (2) is provided with multiple third screw holes that match the second screw holes. The third screw holes are located in the middle between adjacent second screw holes (6). The third screw hole is internally threaded with a screw rod (7). Tightening the screw rod (7) can connect its inner end to the second screw hole (6) on the convex ring (3).

2. A pipe connection flange according to claim 1, characterized in that: The end face of the first flange (1) is provided with a concentric first sealing groove, which is located around the convex ring (3), and a rubber sealing ring (8) is provided inside the first sealing groove.

3. A pipe connection flange according to claim 2, characterized in that: The end face of the second flange (2) is provided with a concentric second sealing groove, which is located in the inner ring of the annular groove (4), and an expanded graphite sealing ring (9) is provided in the second sealing groove.

4. A pipe connection flange according to claim 3, characterized in that: Both the rubber sealing ring (8) and the expanded graphite sealing ring (9) have trapezoidal cross sections.

5. A pipe connection flange according to claim 4, characterized in that: The bottom surface of the convex ring (3) is provided with a first capsule (10), which is filled with epoxy resin (11). The bottom of the annular groove (4) is provided with a second capsule (12), which is filled with a curing agent (13).

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