Tightly-connected pipe connecting flange structure

Abstract

The utility model discloses a tight connection pipe connecting flange structure which comprises two butt joint rings, one side of each butt joint ring is fixedly communicated with a fixing sleeve, four fixing pieces are fixedly connected in each fixing sleeve, the inner surface of each fixing sleeve is in threaded connection with an adjusting screw sleeve, one end of each adjusting screw sleeve is provided with a guide face, and the other end of each adjusting screw sleeve is provided with a connecting piece. The surface of the guide face makes contact with the top ends of the four fixing pieces. According to the pipe connecting flange, by rotating the adjusting screw sleeve, the adjusting screw sleeve enters the fixing sleeve in the rotating process and extrudes the fixing pieces through the guiding faces, the four fixing pieces extrude the outer wall of a pipeline, quick connection and fixation of the pipe connecting flange are achieved, disassembly and replacement are convenient, and the service life is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of flanges, and specifically relates to a connecting flange structure with tight connection. Background Art

[0002] A connecting flange is a pipe fitting widely used in pipe connection and valve installation. It plays a key role in connecting, supporting and sealing in a pipeline system, and is mainly applied to fields such as petroleum, chemical industry, natural gas, pharmacy, electric power, municipal construction, heating ventilation and air conditioning, etc.

[0003] In the prior art, as disclosed in Chinese Patent CN210344619U, one end of a flange connecting pipe is a connecting end, the connecting end face of the connecting end is vertically arranged with the body, and a plurality of weight-reducing grooves are axially arranged on the other end of the body along the axis of the body, and the body between every two adjacent weight-reducing grooves forms a connecting leg.

[0004] Most current flanges are directly welded to one end of a pipe, which makes a flange can only be used on one pipe. When the pipe is damaged, the flange will be discarded together, reducing the service life of the flange. Content of the Utility Model

[0005] The purpose of the utility model is to provide a connecting flange structure with tight connection to solve the problems raised in the above background art.

[0006] To achieve the above purpose, the utility model provides the following technical solution: A connecting flange structure with tight connection, including two docking rings, both sides of the two docking rings are fixedly communicated with fixed sleeves, four fixing pieces are fixedly connected inside the fixed sleeves, an adjusting screw sleeve is threadedly connected to the inner surface of the fixed sleeve, a guiding surface is opened at one end of the adjusting screw sleeve, and the surface of the guiding surface is in contact with the tops of the four fixing pieces.

[0007] As a further preferred of this technical solution, four sliding grooves are opened on the inner surface of the fixed sleeve, driven rods are slidably connected to the inner surfaces of the four sliding grooves, a pushing ring is fixedly connected to the other ends of the four driven rods, an elastic sealing sleeve is fixedly connected to the other end of the pushing ring, and the other end of the elastic sealing sleeve is in contact with one end of the docking ring.

[0008] As a further preferred of this technical solution, bending grooves are opened on the outer surface of the elastic sealing sleeve.

[0009] As a further preferred of this technical solution, a limiting ring is fixedly connected inside the fixed sleeve, and the outer surface of the limiting ring is in contact with the inner surface of the pushing ring.

[0010] As a further preferred of this technical solution, friction lines are opened on the inner sides of the four fixing pieces.

[0011] As a further preference of this technical solution, a gasket is provided between the two docking rings, and the two docking rings are fixed by bolts.

[0012] The utility model provides a pipe flange structure with tight connection, having the following beneficial effects:

[0013] (1) By rotating and adjusting the adjusting sleeve, during the rotation of the adjusting sleeve, it enters the fixed sleeve and squeezes the fixing piece through the guiding surface, so that the four fixing pieces squeeze the outer wall of the pipe, realizing the quick connection and fixation of the pipe flange and facilitating disassembly and replacement, and improving the service life.

[0014] (2) By the movement of the adjusting sleeve in the fixed sleeve, the four driven rods are pushed to move in the chute. During the movement of the driven rods, the pushing ring is driven to squeeze the elastic sealing sleeve. During the squeezing process of the elastic sealing sleeve, due to the action of the bending groove, it shrinks inward, realizing the sealing of the pipe and improving the sealing effect. Description of the Drawings

[0015] Figure 1 is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 is an exploded schematic diagram of the overall structure of the utility model;

[0017] Figure 3 is a schematic diagram of the internal structure of the fixed sleeve of the utility model;

[0018] Figure 4 is an exploded schematic diagram of the internal structure of the fixed sleeve of the utility model.

[0019] In the figure: 1, docking ring; 2, fixed sleeve; 3, fixing piece; 4, adjusting sleeve; 5, guiding surface; 6, friction pattern; 7, chute; 8, driven rod; 9, pushing ring; 10, elastic sealing sleeve; 11, bending groove; 12, limiting ring; 13, gasket. Detailed Embodiments

[0020] Next, the technical solutions in the embodiments of the utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the utility model.

[0021] The utility model provides a technical solution: As Figures 1 - 4As shown in the figure, in this embodiment, a connecting and tightly fitting adapter flange structure includes two docking rings 1. On one side of each of the two docking rings 1, a fixed sleeve 2 is fixedly connected. Inside the fixed sleeve 2, four fixing pieces 3 are fixedly connected. The inner surface of the fixed sleeve 2 is threadedly connected with an adjusting sleeve 4. One end of the adjusting sleeve 4 is provided with a guiding surface 5. The surface of the guiding surface 5 is in contact with the tops of the four fixing pieces 3. By providing the adjusting sleeve 4, the fixing pieces 3 can be pushed to bend. By providing the guiding surface 5, the bending direction of the fixing pieces 3 can be controlled, so as to realize the clamping and fixing of the outer wall of the pipeline.

[0022] As Figure 3 and Figure 4 shown, four sliding grooves 7 are provided on the inner surface of the fixed sleeve 2. The inner surfaces of the four sliding grooves 7 are all slidably connected with driven rods 8. The other ends of the four driven rods 8 are fixedly connected with a pushing ring 9. The other end of the pushing ring 9 is fixedly connected with an elastic sealing sleeve 10. The other end of the elastic sealing sleeve 10 is in contact with one end of the docking ring 1. By providing the driven rods 8, the pushing ring 9 can be driven to move under the push of the adjusting sleeve 4. By providing the elastic sealing sleeve 10, it can elastically deform under the extrusion of the pushing ring 9, so as to seal the gap formed between the pipeline and the fixed sleeve 2 and prevent liquid leakage.

[0023] As Figure 3 and Figure 4 shown, a bending groove 11 is provided on the outer surface of the elastic sealing sleeve 10. By providing the bending groove 11, the deformation direction of the elastic sealing sleeve 10 can be guided.

[0024] As Figure 3 and Figure 4 shown, a limiting ring 12 is fixedly connected inside the fixed sleeve 2. The outer surface of the limiting ring 12 is in contact with the inner surface of the pushing ring 9. By providing the limiting ring 12, the pushing ring 9 can be positioned to prevent it from being skewed.

[0025] As Figure 3 and Figure 4 shown, friction stripes 6 are provided on the inner sides of the four fixing pieces 3, which can increase the friction force between the fixing pieces 3 and the outer wall of the pipeline and make the fixing more firm.

[0026] As Figure 1 and Figure 2 shown, a sealing gasket 13 is provided between the two docking rings 1. The two docking rings 1 are bolted together, which can prevent liquid leakage and improve the sealing performance.

[0027] The present utility model provides a connecting and tightly fitting adapter flange structure, and the specific working principle is as follows:

[0028] The staff members sequentially insert two pipes into the inside of the fixed sleeve 2, and then rotate the adjusting sleeve 4. During the rotation of the adjusting sleeve 4, it enters into the fixed sleeve 2 and squeezes the fixing piece 3 through the guiding surface 5, so that the four fixing pieces 3 squeeze and fix the outer wall of the pipe. During the fixing process, the movement of the adjusting sleeve 4 in the fixed sleeve 2 pushes the four driven rods 8 to move in the sliding grooves 7. During the movement of the driven rods 8, the pushing ring 9 is driven to squeeze the elastic sealing sleeve 10. During the squeezing process of the elastic sealing sleeve 10, due to the action of the bending groove 11, it contracts inward to seal the gap between the pipe and the fixed sleeve. After the installation is completed, the two docking rings 1 are connected and fixed by bolts to complete the installation of the docking pipe flange.

[0029] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A tightly connected adapter flange structure, comprising two docking rings (1), characterized in that: On one side of each of the two docking rings (1), a fixed sleeve (2) is fixedly connected. Four fixing pieces (3) are fixedly connected inside the fixed sleeve (2). An adjusting nut sleeve (4) is threadedly connected to the inner surface of the fixed sleeve (2). A guiding surface (5) is provided at one end of the adjusting nut sleeve (4). The surface of the guiding surface (5) is in contact with the tops of the four fixing pieces (3).

2. The closely connected nozzle flange structure according to claim 1, characterized in that: Four sliding grooves (7) are provided on the inner surface of the fixed sleeve (2). Driven rods (8) are slidably connected to the inner surfaces of the four sliding grooves (7). A pushing ring (9) is fixedly connected to the other ends of the four driven rods (8). An elastic sealing sleeve (10) is fixedly connected to the other end of the pushing ring (9). The other end of the elastic sealing sleeve (10) is in contact with one end of the docking ring (1).

3. The tightly connected nozzle flange structure according to claim 2, characterized in that: A bending groove (11) is provided on the outer surface of the elastic sealing sleeve (10).

4. A closely connected nozzle flange structure according to claim 3, characterized in that: A limiting ring (12) is fixedly connected inside the fixed sleeve (2). The outer surface of the limiting ring (12) is in contact with the inner surface of the pushing ring (9).

5. A tightly connected nozzle flange structure according to claim 1, characterized in that: Friction stripes (6) are provided on the inner sides of the four fixing pieces (3).

6. A tightly connected adapter flange structure according to claim 1, characterized in that: A sealing gasket (13) is provided between the two docking rings (1). The two docking rings (1) are bolted together.

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