Quick connector for steel pipes

Abstract

The utility model provides a steel pipe quick connector which comprises a connecting seat and a base, a connecting short pipe is arranged at one end of the connecting seat close to the base, the connecting short pipe is inserted into the base, the steel pipe quick connector further comprises a sealing gland and an annular sealing piece, and the annular sealing piece is arranged between the connecting seat and the base. The sealing gland is detachably connected with the base, the annular sealing piece is installed at the top end of the base, an installation hole is formed in the axis of the base in the axial direction, the annular sealing piece extends into the installation hole, and the connecting short pipe is in interference fit with the annular sealing piece in the installation hole and is in clearance fit with the installation hole. The connecting short pipe penetrates through the annular sealing hole and extends into the mounting hole, due to the fact that the connecting short pipe is in interference fit with the annular sealing piece in the mounting hole, the connecting short pipe and the annular sealing piece are tightly connected, the annular sealing piece is fixed to the base, and therefore tight connection among the connecting short pipe, the annular sealing piece and the base is achieved.

Description

Technical Field

[0001] The utility model relates to the field of dredging, in particular to a steel pipe quick connector. Background Art

[0002] Dredging is the process of clearing, widening or deepening rivers, lakes and other water areas. During dredging projects, pipelines are used to transport fluids to designated locations. Pipelines are generally assembled from multiple sections of pipes.

[0003] Most of the existing pipelines are directly connected through flanges, and workers need to tighten multiple bolts, which is cumbersome, difficult to connect and inefficient. According to the existing pipeline design, when connecting two pipelines while continuing to transport fluid, the sealing of the pipeline connection is difficult to ensure due to the large weight of the pipeline itself and the high pressure and flow rate of the fluid. When connecting the two pipelines when the fluid transportation is stopped, it is easy to cause pipeline blockage.

[0004] A patent document in China with application number 2022235895943.3 and publication date 2023.5.16 discloses a steel dredging pipe, comprising a first dredging pipe, a second dredging pipe and a pipe connecting structure connecting the first dredging pipe and the second dredging pipe; the pipe connecting structure comprises a second connecting seat fixed at the end of the first dredging pipe, and a first connecting seat fixed at the end of the second dredging pipe, one end of the first connecting seat extends axially to cover the second connecting seat; the outer circumferential surface of the first connecting seat is threaded with a plurality of bolts, and the plurality of bolts penetrate the first connecting seat and contact with one side surface of the second connecting seat.

[0005] In the above pipeline connection structure, after the second connection seat is inserted into the first connection seat, it is necessary to rotate the bolt inserted behind the second connection seat to limit the second connection seat from being separated from the first connection seat. The structure is complex and the operation is cumbersome when locking the first connection seat and the second connection seat. Utility Model Content

[0006] The utility model provides a steel pipe quick connector, which realizes sealing through an annular seal and realizes assembly between a connecting seat and a base at the same time, and has a simple structure.

[0007] To achieve the above-mentioned purpose, the technical solution of the utility model is: a steel pipe quick connector, including a connecting seat and a base, a connecting short tube is provided at one end of the connecting seat close to the base, the connecting short tube is inserted in the base, and also includes a sealing cover and an annular seal, the annular seal is arranged between the connecting seat and the base, the sealing cover and the base are detachably connected and the annular seal is installed on the top of the base, a mounting hole is axially provided at the axis of the base, the annular seal extends into the mounting hole, the connecting short tube and the annular seal in the mounting hole have an interference fit, the connecting short tube and the mounting hole have a clearance fit, and the connecting short tube passes through the annular sealing hole and extends into the mounting hole.

[0008] The above arrangement connects the base through the sealing gland, presses the annular seal against the base, and ensures the installation reliability of the annular seal; when the connecting short tube is connected to the base, the connecting short tube passes through the annular seal and then extends into the mounting hole. Since the connecting short tube and the annular seal in the mounting hole have an interference fit, the connecting short tube and the annular seal are tightly connected, and the annular seal is fixed on the base, thereby achieving a tight connection between the connecting short tube, the annular seal and the base. Through the cooperation of the connecting short tube and the annular seal, the assembly between the connecting seat and the base is achieved while achieving sealing, and the structure is simple.

[0009] At the same time, the connecting short tube and the mounting hole clearance match, and there will be fluid inside the connector when it is installed and used. The fluid flows into the gap between the connecting short tube and the base to exert pressure on the annular seal, pressing the annular seal against the connecting short tube, thereby increasing the friction between the annular seal and the connecting short tube; under the interaction of the interference fit between the connecting short tube and the annular seal, and the clearance fit between the connecting short tube and the mounting hole, the reliability of the connecting short tube installed in the base is further improved.

[0010] Furthermore, a supporting portion is recessed downward at the top of the base, a pressing portion is extended downward from the sealing gland, and one end of the annular seal is accommodated between the supporting portion and the pressing portion and abuts against the supporting portion and the pressing portion respectively.

[0011] The above arrangement accommodates the annular seal by means of the recessed supporting portion, and at the same time presses the annular seal in the supporting portion by means of the pressing portion, thereby further improving the stability of the installation of the annular seal.

[0012] Furthermore, the annular sealing member is arranged to be inclined downward from one end to the other end.

[0013] With the above arrangement, when the connecting pipe passes through the annular seal, the contact area between the annular seal and the connecting pipe will turn outward. By setting an inclined annular seal, the contact area between the annular seal and the connecting pipe is increased, thereby improving the sealing effect and the connection stability between the connecting pipe and the annular seal; at the same time, the installation of the connecting pipe is facilitated.

[0014] Furthermore, the supporting portion and the pressing portion are both arranged obliquely and matched with the shape of the annular sealing member.

[0015] With the above arrangement, the supporting part and the pressing part are both matched with the shape of the annular seal, so that the contact area between the supporting part, the pressing part and the annular seal is large, and the installation reliability of the annular seal is good.

[0016] Furthermore, an escape area is recessed on the inner wall of the mounting hole toward the axis of the base, and the escape area is located below the annular seal.

[0017] With the above arrangement, when the connecting short tube cooperates with the annular seal, the annular seal will be deformed. By setting the avoidance area to avoid the annular seal, the deformation range of the annular seal is increased, which facilitates the cooperation between the connecting short tube and the annular seal.

[0018] Furthermore, a step portion is horizontally extended from the inner wall of the mounting hole toward the axis of the base, and the connecting short tube extending into the mounting hole abuts against the step portion.

[0019] The above arrangement realizes installation limitation of the connecting short pipe in the base by abutting the step portion against the connecting short pipe.

[0020] Furthermore, a first connecting hole is provided on the sealing cover, and a second connecting hole is provided on the top of the base, and the first connecting hole and the second connecting hole are locked by a locking piece.

[0021] The above arrangement connects the sealing gland and the base through a locking piece, and has good reliability.

[0022] Furthermore, the first connecting hole and the second connecting hole are both bolt holes, and the locking member is a bolt, so that disassembly and assembly are convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a three-dimensional schematic diagram of the utility model.

[0024] Figure 2 This is a usage state diagram of the utility model.

[0025] Figure 3 It is a cross-sectional view of the utility model.

[0026] Figure 4 for Figure 3 A magnified image of

[0027] Figure 5 for Figure 3 Exploded diagram of .

[0028] Figure 6 for Figure 5 Enlarged view of B.

[0029] Figure numerals: connecting seat 1, base 2, sealing cover 3, annular seal 4, first pipe 5, second pipe 6, connecting short pipe 10, mounting hole 20, avoidance area 21, supporting portion 22, step portion 23, second connecting hole 24, pressing portion 31, first connecting hole 32. DETAILED DESCRIPTION

[0030] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0031] like Figure 1-6 As shown, a steel pipe quick connector includes a connecting seat 1, a base 2, a sealing gland 3 and an annular sealing member 4; Figure 2 As shown, one end of the connecting seat 1 is used to connect to the first pipe 5, and the base 2 is used to connect to the second pipe 6. A connecting short pipe 10 is provided at one end of the connecting seat 1 close to the base 2, and the connecting short pipe 10 is inserted into the base 2 to realize the connection between the first pipe 5 and the second pipe 6.

[0032] The annular seal 4 is arranged between the connection seat 1 and the base 2, the sealing gland 3 is detachably connected to the base 2 and the annular seal 4 is installed on the top of the base 2. The sealing gland 3 is connected to the base 2, and the annular seal 4 is pressed on the base 2, thereby ensuring the installation reliability of the annular seal 4. A mounting hole 20 is axially arranged at the axis of the base 2, the annular seal 4 extends into the mounting hole 20, the connecting short tube 10 is interference-fitted with the annular seal 4 in the mounting hole 20, the connecting short tube 10 is clearance-fitted with the mounting hole 20, and the connecting short tube 10 passes through the annular sealing hole and extends into the mounting hole 20.

[0033] Due to the interference fit between the connecting short tube 10 and the annular seal 4 in the mounting hole 20, the connecting short tube 10 and the annular seal 4 are tightly connected, and the annular seal 4 is fixed on the base 2, thereby realizing the tight connection between the connecting short tube 10, the annular seal 4 and the base 2. Through the cooperation between the connecting short tube 10 and the annular seal 4, the assembly between the connecting seat 1 and the base 2 is realized while the seal is realized, and the structure is simple. At the same time, the connecting short tube 10 and the mounting hole 20 are clearance-matched, and there will be fluid inside the connector during installation and use. The fluid flows into the gap between the connecting short tube 10 and the base 2 to exert pressure on the annular seal 4, pressing the annular seal 4 on the connecting short tube 10, thereby increasing the friction between the annular seal 4 and the connecting short tube 10; under the interaction of the interference fit between the connecting short tube 10 and the annular seal 4 and the clearance fit between the connecting short tube 10 and the mounting hole 20, the reliability of the connecting short tube 10 installed in the base 2 is further improved.

[0034] In this embodiment, the annular seal 4 is a bowl-shaped sealing ring, and the annular seal 4 is tilted downward from one end to the other end. When the connecting pipe passes through the annular seal 4, the contact area between the annular seal 4 and the connecting pipe will turn outward. By setting the inclined annular seal 4, the contact area between the annular seal 4 and the connecting pipe is increased, the sealing effect is improved, and the connection stability between the connecting pipe and the annular seal 4 is improved; at the same time, the installation of the connecting pipe is convenient.

[0035] The inner wall of the mounting hole 20 is recessed with an escape area 21 toward the axial direction of the base 2, and the escape area 21 is located below the annular seal 4. When the connecting short tube 10 is matched with the annular seal 4, the annular seal 4 will be deformed. By providing the escape area 21, the annular seal 4 is avoided, and the range of movement of the deformation of the annular seal 4 is increased, so that the connecting short tube 10 and the annular seal 4 can be matched easily.

[0036] The top of the base 2 is recessed with a supporting portion 22, and the sealing gland 3 is extended downward with a pressing portion 31, and one end of the annular seal 4 is accommodated between the supporting portion 22 and the pressing portion 31 and abuts against the supporting portion 22 and the pressing portion 31 respectively. The annular seal 4 is accommodated by the recessed supporting portion 22, and the annular seal 4 is pressed tightly in the supporting portion 22 by the pressing portion 31, so as to further improve the stability of the installation of the annular seal 4. In this embodiment, the supporting portion 22 and the pressing portion 31 are both inclined and matched with the shape of the annular seal 4. The supporting portion 22 and the pressing portion 31 are both matched with the shape of the annular seal 4, so that the contact area between the supporting portion 22, the pressing portion 31 and the annular seal 4 is large, and the installation reliability of the annular seal 4 is good.

[0037] A step portion 23 extends horizontally from the inner wall of the mounting hole 20 toward the axis of the base 2, and the connecting short pipe 10 inserted into the mounting hole 20 abuts against the step portion 23. The step portion 23 abuts against the connecting short pipe 10 to achieve installation limitation of the connecting short pipe 10 in the base 2.

[0038] In this embodiment, bolt holes are provided on the first pipe 5 and the connection seat 1, and the first pipe 5 is connected to the connection seat 1 by bolts; bolt holes are provided on the second pipe 6 and the base 2, and the second pipe 6 is connected to the base 2 by bolts; a first connection hole 32 is provided on the sealing gland 3, and a second connection hole 24 is provided on the top of the base 2, and the first connection hole 32 and the second connection hole 24 are locked by a locking piece (not shown in the figure). The sealing gland 3 and the base 2 are connected by the locking piece, which has good reliability. The first connection hole 32 and the second connection hole 24 are both bolt holes, and the locking piece is a bolt. This makes disassembly and assembly convenient.

[0039] During installation, the annular seal 4 is first installed on the base 2 through the sealing gland 3, the first pipe 5 is pre-connected with the connecting seat 1, the second pipe 6 is pre-connected with the base 2, and then the connecting pipe of the connecting seat 1 is inserted into the mounting hole 20 of the base 2 through the annular seal 4. Since the connecting seat 1 and the base 2 are connected by plug-in, when the first pipe 5 and the second pipe 6 are connected, the two pipes can be connected while continuing to transport the fluid, thereby realizing a quick connection of the two pipes. At the same time, since the fluid is transported during installation, the annular seal 4 will be pressed against the outer wall of the connecting pipe under the action of the fluid, thereby ensuring the reliability and sealing of the installation.

[0040] The installation principle of the utility model is to press the annular seal 4 onto the base 2 through the sealing gland 3, and the annular seal 4 is stably installed on the base 2. The connecting short tube 10 and the annular seal 4 are tightly connected by the interference fit between the connecting short tube 10 and the annular seal 4, so that the connecting short tube 10 is stably installed on the base 2. At the same time, through the gap fit between the connecting short tube 10 and the mounting hole 20, the fluid flows into the gap between the connecting short tube 10 and the base 2 to apply pressure to the annular seal 4, and the annular seal 4 is pressed against the connecting short tube 10, thereby increasing the friction between the annular seal 4 and the connecting short tube 10; and improving the reliability of the connecting short tube 10 installed in the base 2.

Claims

1. A steel pipe quick connector, comprising a connection seat and a base, wherein one end of the connection seat close to the base is provided with a connection short tube, and the connection short tube is plugged into the base, characterized in that: It also includes a sealing cover and an annular seal, which is arranged between the connecting seat and the base. The sealing cover and the base are detachably connected and the annular seal is installed on the top of the base. A mounting hole is axially arranged at the axis of the base, and the annular seal extends into the mounting hole. The connecting short tube has an interference fit with the annular seal in the mounting hole, and the connecting short tube has a clearance fit with the mounting hole. The connecting short tube passes through the annular sealing hole and extends into the mounting hole.

2. A steel pipe quick connector according to claim 1, characterized in that: The top of the base is recessed downward to form a supporting portion, the sealing gland is extended downward to form a pressing portion, and one end of the annular seal is accommodated between the supporting portion and the pressing portion and abuts against the supporting portion and the pressing portion respectively.

3. A steel pipe quick connector according to claim 2, characterized in that: The annular sealing member is arranged to be inclined downward from one end to the other end.

4. A steel pipe quick connector according to claim 3, characterized in that: The supporting portion and the pressing portion are both arranged obliquely and matched with the annular sealing member in shape.

5. A steel pipe quick connector according to claim 3, characterized in that: The inner wall of the mounting hole is recessed toward the axis of the base to form an escape area, and the escape area is located below the annular sealing component.

6. A steel pipe quick connector according to claim 1, characterized in that: A step portion is horizontally extended on the inner wall of the mounting hole toward the axial center direction of the base, and the connecting short pipe extending into the mounting hole abuts against the step portion.

7. The steel pipe quick connector according to claim 1, characterized in that: A first connecting hole is provided on the sealing gland, and a second connecting hole is provided on the top of the base. The first connecting hole and the second connecting hole are locked by a locking piece.

8. A steel pipe quick connector according to claim 7, characterized in that: The first connecting hole and the second connecting hole are both bolt holes, and the locking member is a bolt.

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