CN100422621C - Connection device for concrete delivery pipe - Google Patents

Abstract

The invention discloses a connection device for a concrete conveying pipe, which comprises a male flange (2) and a female flange (4) installed on the conveying pipe (1), and is characterized in that: the male flange (2) and the female flange The flange (4) is fastened and connected by the Ω-shaped pipe clamp (5) that cooperates with each other. The outer edges of the male flange (2) and the female flange (4) are respectively provided with a tapered surface (22), and the tapered surface (22) ) and the inner conical surface (51) of the Ω-shaped pipe clamp (5) cooperate with each other to form the first conical surface seal (8). The invention has the advantages of ensuring no slurry leakage and no bursting of pipes during ultra-high pressure construction, thereby avoiding pressure loss and engineering loss.

Description

Connection device for concrete delivery pipe

technical field

The invention relates to the field of pipeline connection, in particular to a connection device for concrete delivery pipes.

Background technique

At present, there are four connection methods for pipeline connection in the process of laying concrete pipelines, but none of them can meet the requirements of ultra-high pressure transmission. The four connection methods are as follows:

A. The two flange faces are connected, and the circular pipe is clamped with a radial sealing ring. This connection method is only suitable for ordinary high-pressure pump transportation.

B. The two flanges face to face, the circular pipe is clamped with a radial sealing ring, and two full movable flanges are added outside the flange, and the two full movable flanges are connected by bolts, that is, the axial tension is increased to make the connection of the conveying pipe more stable. Reliable, but after actual construction, this connection method is only suitable for medium and high pressure pumping.

C. The two flange faces are connected, one of the flange faces has a seal ring groove, and the seal ring is used to seal the end face, and the two flange faces are connected by bolts. This structure is only suitable for high-pressure pumping

D. The two flange faces are connected, and one of the flange faces is provided with a seal ring groove, and the end face is sealed with a seal ring. Two movable flanges are added outside the flange, and the two movable flanges are connected by bolts, that is Increase the axial tension to make the delivery pipe connection more reliable. This connection method is only suitable for high-pressure pumping.

Due to the requirement of floor height, ultra-high pressure pumping technology must be used in construction now, and the system pressure reaches 35MPa. The above four connection methods can no longer meet the requirements of ultra-high pressure pumping. Faults such as slurry leakage and pipe burst are prone to occur, resulting in pressure loss and engineering loss.

Contents of the invention

The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art, and to provide a connection device for concrete delivery pipes that can ensure no slurry leakage and no bursting of pipes during ultra-high pressure construction.

The connecting device of the concrete conveying pipe of the present invention comprises a male flange and a female flange on which the conveying pipe 1 is arranged, and the male flange and the female flange are fastened and connected by mutually matching Ω-shaped pipe clamps, and the male flange and the female flange are connected tightly. The outer edges are respectively provided with conical surfaces, which cooperate with the inner conical surfaces of the Ω-shaped pipe clamp to form the first conical surface seal

As an improvement of the present invention, the outer edge of the contact surface of the male flange and the female flange is provided with a hexagonal tapered surface, the outer edge of the contact surface of the female flange and the male flange is provided with a concave tapered surface, and the convex The conical surface and the concave conical surface cooperate with each other to form a second conical surface seal, which improves the sealing performance, and at the same time utilizes the cooperation of the two conical surfaces to play the role of radial centering.

As a further improvement of the present invention, a first seal ring groove is provided on the contact surface of the male flange and the female flange, a first seal ring is provided in the first seal ring groove, and an end face seal is added.

As a further improvement of the present invention, a first boss is provided at the inner edge of the contact end of the male flange and the female flange, and the first boss is fastened with the port of the delivery pipe, and the other ends of the male flange and the female flange are fixed respectively. On the delivery pipe, it provides convenience for the axial positioning of the flange and the sealing of the end face.

As a further improvement of the present invention, the inner edge of the contact end of the male flange and the female flange is provided with a first boss, which is fastened with the port of the delivery pipe, and the other end is fixed on the delivery pipe; the female flange and the male flange The contact surface is flush with the port of the conveying pipe, and the female flange is provided with a slit groove at this end to match with the second boss of the port of the conveying pipe; the second boss is provided with a second sealing ring groove, and the second There is a second sealing ring in the sealing ring groove, and a radial seal is added, and the female flange is not fixed on the delivery pipe, which is easy to disassemble.

The present invention adopts technologies such as Ω-shaped pipe clamps with tapered surfaces and male and female flange connections with tapered surfaces to improve the sealing performance and make the connection of the delivery pipes more reliable; the tapered surfaces between the male and female flanges also play a radial role The function of centering avoids misalignment during assembly of the conveying pipe; the conveying pipe is made of quenched steel pipe to improve its wear resistance. Due to the support of the above technologies, the fixed connection device of the concrete delivery pipe can ensure no slurry leakage and no pipe explosion during the ultra-high pressure construction process, thereby avoiding pressure loss and engineering loss.

Description of drawings

Fig. 1 is the structural representation of embodiment 1;

Fig. 2 is the structural representation of embodiment 2;

Fig. 3 is a schematic diagram of the structure of the male flange;

Fig. 4 is the schematic diagram of female flange structure in embodiment 1;

Fig. 5 is the schematic diagram of female flange structure in embodiment 2;

Fig. 6 is a structural schematic diagram of an Ω-shaped pipe clamp;

Fig. 7 is a schematic diagram of a cross-sectional structure of an Ω-shaped pipe clamp.

illustration:

1. Delivery pipe 2. Male flange 3. First sealing ring

4. Female flange 5. Ω-shaped pipe clamp 6. Bolt

7. Nut 8. First cone seal 9. Second cone seal

11. Second boss 12. Second sealing ring groove 13. Second sealing ring

21. The first boss 22. Cone surface 23. Convex cone surface

24. First sealing ring groove 41. Stop groove 42. Concave cone surface

51. Inner edge cone

Detailed ways

Embodiment 1: the connecting device of the concrete conveying pipe shown in Fig. 1, Fig. 3, Fig. 4, Fig. 6 and Fig. 7, including the male flange 2 and the female flange 4 installed on the conveying pipe 1, the male flange 2 and the The female flange 4 is tightly connected by the Ω-shaped pipe clamp 5 that cooperates with each other. The outer edges of the male flange 2 and the female flange 4 are respectively provided with a tapered surface 22, and the tapered surface 22 is conical with the inner edge of the Ω-shaped pipe clamp 5. The faces 51 cooperate to form the first cone seal 8 . A convex tapered surface 23 is provided on the outer edge of the contact surface of the male flange 2 with the female flange 4, and a concave tapered surface 42 is provided at the outer edge of the contact surface of the female flange 4 with the male flange 2. The conical surface 23 and the concave conical surface 42 cooperate with each other to form the second conical surface seal 9 . A first sealing ring groove 24 is provided on the contact surface of the male flange 2 with the female flange 4 , and a first sealing ring 3 is arranged in the first sealing ring groove 24 . The inner edge of the contact end of the male flange 2 and the female flange 4 is provided with a first boss 21, the first boss 21 is fastened with the port of the delivery pipe 1, and the other ends of the male flange 2 and the female flange 4 are respectively welded to the delivery pipe. Tube 1 on.

Embodiment 2: the connecting device of the concrete conveying pipe shown in Fig. 2, Fig. 3, Fig. 5, Fig. 6 and Fig. 7, including the male flange 2 and the female flange 4 installed on the conveying pipe 1, the male flange 2 and the The female flange 4 is tightly connected by the Ω-shaped pipe clamp 5 that cooperates with each other. The outer edges of the male flange 2 and the female flange 4 are respectively provided with a tapered surface 22, and the tapered surface 22 is conical with the inner edge of the Ω-shaped pipe clamp 5. The faces 51 cooperate to form the first cone seal 8 . A convex tapered surface 23 is provided on the outer edge of the contact surface of the male flange 2 with the female flange 4, and a concave tapered surface 42 is provided at the outer edge of the contact surface of the female flange 4 with the male flange 2. The conical surface 23 and the concave conical surface 42 cooperate with each other to form the second conical surface seal 9 . A first sealing ring groove 24 is provided on the contact surface of the male flange 2 with the female flange 4 , and a first sealing ring 3 is arranged in the first sealing ring groove 24 . The inner edge of the contact end of the male flange 2 and the female flange 4 is provided with a first boss 21, which is fastened with the port of the conveying pipe 1, and the other end is welded to the conveying pipe 1; the female flange 4 is in contact with the male flange 2 The surface is flush with the port of the delivery pipe, and the female flange 4 is provided with a spigot groove 41 at this end, which is matched with the second boss 11 of the port of the delivery pipe 1; the second boss 11 is provided with a second sealing ring groove 12. The second sealing ring groove 12 is provided with a second sealing ring 13 .

The seal ring groove 24 given in the above two examples can be set not only on the male flange 2, but also on the female flange 4, and when necessary, two or more ring seal ring grooves can also be set; In addition to being welded and fixed on the delivery pipe, the male and female flanges can also be fixed on the delivery pipe by other methods such as threaded connection. Such transformations all fall within the protection scope of the present invention.

Claims (7)

1. A connection device for a concrete delivery pipe, comprising a male flange (2) and a female flange (4) installed on the delivery pipe (1), characterized in that: the male flange (2) and the female flange (4) Fasten the connection through the Ω-shaped pipe clamps (5) that cooperate with each other, and the outer edges of the male flange (2) and the female flange (4) are respectively provided with a tapered surface (22), the tapered surface (22) and The inner conical surface (51) of the Ω-shaped pipe clamp (5) cooperates with each other to form the first conical surface seal (8). 2. The connection device of the concrete delivery pipe according to claim 1, characterized in that: the outer edge of the contact surface of the male flange (2) with the female flange (4) is provided with a convex tapered surface (23) , the female flange (4) is provided with a concave conical surface (42) at the outer edge of the contact surface with the male flange (2), and the convex conical surface (23) and the concave conical surface (42) cooperate with each other to form a second Two cone seals (9). 3. The connection device for the concrete delivery pipe according to claim 1 or 2, characterized in that: the contact surface of the male flange (2) with the female flange (4) is provided with a first sealing ring groove (24), A first sealing ring (3) is arranged in the first sealing ring groove (24). 4. The connecting device of the concrete delivery pipe according to claim 1 or 2, characterized in that: the inner edge of the contact end of the male flange (2) and the female flange (4) is provided with a first boss (21 ), the first boss (21) is fastened with the port of the delivery pipe (1), and the other ends of the male flange (2) and the female flange (4) are fixedly connected to the delivery pipe (1) respectively. 5. The connecting device of the concrete delivery pipe according to claim 1 or 2, characterized in that: the inner edge of the contact end of the male flange (2) with the female flange (4) is provided with a first boss (21 ), fasten with the port of the delivery pipe (1), and the other end is fixedly connected to the delivery pipe (1); the contact surface of the female flange (4) and the male flange (2) is flush with the port of the delivery pipe, and the female flange (4) The flange (4) is provided with a notch groove (41) at this end, which is matched with the second boss (11) at the port of the delivery pipe (1); the second boss (11) is provided with a second sealing ring groove ( 12), the second sealing ring groove (12) is provided with a second sealing ring (13). 6. The connecting device of the concrete delivery pipe according to claim 3, characterized in that: the inner edge of the contact end of the male flange (2) and the female flange (4) is provided with a first boss (21), The first boss (21) is buckled with the port of the delivery pipe (1), and the other ends of the male flange (2) and the female flange (4) are respectively fixed on the delivery pipe (1). 7. The connection device for the concrete delivery pipe according to claim 3, characterized in that: the inner edge of the contact end of the male flange (2) with the female flange (4) is provided with a first boss (21), Fasten with the port of the delivery pipe (1), and the other end is fixed on the delivery pipe (1); the contact surface of the female flange (4) and the male flange (2) is flush with the port of the delivery pipe, and the female flange ( 4) A notch groove (41) is provided at this end to match the second boss (11) at the port of the delivery pipe (1); the second boss (11) is provided with a second sealing ring groove (12) , the second sealing ring groove (12) is provided with a second sealing ring (13).

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