Groove pipe fitting with high sealing performance

Abstract

The utility model provides a groove pipe fitting with high sealing performance, which comprises a pipe fitting body and a sealing sleeve, limiting grooves are arranged on the outer side walls of the upper end and the lower end of the pipe fitting body, an embedding groove is arranged on the pipe fitting body close to the end face, and the embedding groove is arranged between the limiting grooves and the end face of the pipe fitting body. The sealing sleeve is a columnar sleeve, the two ends of the sealing sleeve are provided with turned-over edges bent inwards, and when the two pipe fitting bodies are connected in an up-down butt joint mode, the turned-over edges are embedded into the embedding grooves. According to the groove pipe fitting with the high sealing performance, the sealing sleeve with the two ends embedded in the pipe fitting is arranged outside the conventional sealing ring, liquid flowing in the pipe gives pressure to the sealing ring, the sealing ring is in direct contact with the sealing sleeve, the pressure is transmitted to the sealing sleeve, the middle position of the sealing sleeve is stressed, and the sealing sleeve is not damaged. The flanging and the embedded groove are stressed, so that the embedding is tighter, the sealing performance is further improved, and the sealing performance is substantially improved due to the two-layer sealing arrangement.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of trench pipe fitting, specifically to a high sealing trench pipe fitting. BACKGROUND

[0002] The trench pipe fitting is a new type of steel pipe connecting pipe fitting, has many advantages, has become the current liquid, gas pipeline connection's first choice technology. The inner wall of the existing trench pipe fitting is easy to wear or corrode, secondary pollution is easy to occur in the fluid conveying process, the service life is short, the safety performance is low, the impact resistance, flexibility and sound insulation effect are all poor, and a plane is arranged at the connecting part, the stability of the connection is poor, and it is also difficult to isolate fluid exosmosis.

[0003] The existing trench pipe fitting often sets a sealing ring at the place where two pipe fittings are connected, and a locking clamp is further arranged on the outer side of the sealing ring.

[0004] In order to solve the above problems, the present case is born. CONTENT OF THE UTILITY MODEL

[0005] (I) Technical problem solved

[0006] The utility model aims at providing a high sealing trench pipe fitting to solve the problems in the above background technology.

[0007] (II) Technical scheme

[0008] In order to achieve the above purpose, the utility model is implemented by the following technical scheme: a high sealing trench pipe fitting, comprising a pipe fitting body and a sealing sleeve, the pipe fitting body, a limiting groove is formed on the outer side wall of the upper and lower ends of the pipe fitting body, an embedding groove is formed near the end face of the pipe fitting body, the embedding groove is located between the limiting groove and the end face of the pipe fitting body, the sealing sleeve is a cylindrical sleeve, the two ends of the sealing sleeve are provided with inwardly bent flanges, and the flanges are embedded in the embedding groove when the upper and lower pipe fitting bodies are connected in an upper and lower butt joint manner.

[0009] Preferably, the embedding groove is L-shaped, comprising a horizontal transverse groove and a vertical vertical groove, the groove wall of the vertical vertical groove and the bending part are provided with friction lines, and the outer wall of the flange is provided with fine convex lines.

[0010] Preferably, the distance between the embedding grooves between the upper and lower pipe fitting bodies after the upper and lower ends of the pipe fitting body are connected in an upper and lower butt joint manner is greater than the axial length of the sealing sleeve.

[0011] Preferably, the pipe body is fixedly connected with a stainless steel layer, the stainless steel layer is bent and laid on the outer side of the two ends of the pipe body, the pipe body interface port is formed with a notch with the stainless steel layer, and the two notches of the upper and lower pipe bodies are connected when the two pipe bodies are connected in an upper and lower butt joint mode.

[0012] Preferably, the limiting groove is provided with a clamp when the two pipe bodies are connected in an upper and lower butt joint mode.

[0013] Preferably, the stainless steel layer is laid on the outer side of the two ends of the pipe body, and an arc protrusion is arranged on one side and an arc recess is arranged on the other side.

[0014] (Three) beneficial effects

[0015] Compared with the prior art, the high-sealing-groove pipe has the following advantages: the high-sealing-groove pipe is provided with a sealing sleeve embedded in the pipe body at two ends outside a conventional sealing ring, a liquid flowing in the pipe gives pressure to the sealing ring, the sealing ring directly contacts the sealing sleeve, the pressure is transmitted to the sealing sleeve, the middle position of the sealing sleeve is subjected to the pressure, the force acting on the embedded groove and the flange makes the embedded groove more tightly embedded, and the sealing performance is further improved, two layers of sealing are arranged, and the sealing performance is substantially improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a structural schematic view of the utility model;

[0017] Figure 2 It is Figure 1 It is an enlarged schematic view of position A in the figure;

[0018] Figure 3 It is a sealing sleeve schematic view;

[0019] In the figure: 1, pipe body; 2, limiting groove; 3, embedded groove; 31, horizontal groove; 32, vertical groove; 33, frictional groove; 4, sealing sleeve; 41, flange; 5, stainless steel layer; 6, notch; 7, clamp; 8, sealing ring. DETAILED DESCRIPTION

[0020] The utility model is further described in detail below through the drawings and examples.

[0021] The utility model discloses an embodiment of a high-sealing-groove pipe, as shown in the figure, which comprises a pipe body 1 and a sealing sleeve 4. Figures 1-3 The pipe body 1 is provided with a limiting groove 2 on the outer side wall of the upper and lower two ends, an embedded groove 3 is arranged at the end face of the pipe body 1, the embedded groove 3 is located between the limiting groove 2 and the end face of the pipe body 1, the sealing sleeve 4 is in the form of a cylindrical sleeve, the two ends of the sealing sleeve are provided with inwardly bent flanges 41, and the flanges 41 are embedded in the embedded groove 3 when the two pipe bodies 1 are connected in an upper and lower butt joint mode.

[0022] Reference drawings Figures 2-3 The embedded groove 3 is L-shaped, comprising a horizontal transverse groove 31 and a vertical vertical groove 32, and the groove wall of the vertical groove 32 and the bending part are provided with friction lines 33, and the outer wall of the flange 41 is provided with fine convex lines.

[0023] After the upper and lower pipe bodies 1 are butted, the distance between the embedded grooves 3 between the upper and lower pipe bodies 1 is slightly greater than the axial length of the sealing sleeve 4, the sealing ring 8 is sleeved at the gap 6 after the two pipe bodies 1 are butted, and then the flange 41 at one end of the sealing sleeve 4 is embedded in the embedded groove 3, and the flange 41 at the other end is embedded in the embedded groove 3 by elongating the sealing sleeve 4, and the sealing sleeve 4 is stretched and directly contacts the sealing ring 8.

[0024] Both the sealing ring 8 and the sealing sleeve 4 are supported by rubber, and the tensile strength is greater than or equal to 6 MPa, the elongation at break is greater than or equal to 200%, the air aging resistance (200℃ 70h) is less than or equal to -20%, and the elongation at break is changed by -30% to +10%.

[0025] The sealing sleeve 4 embedded in the pipe at both ends is arranged outside the conventional sealing ring 8, the liquid flowing in the pipe gives pressure to the sealing ring 8, the sealing ring 8 directly contacts the sealing sleeve 4, the pressure is transmitted to the sealing sleeve 4, the middle position of the sealing sleeve 4 is subjected to pressure, the flange 41 and the embedded groove 3 are stressed to make the embedded fit more closely, thereby further improving the sealing performance, two layers of sealing are arranged, and the sealing performance is substantially improved.

[0026] The stainless steel layer 5 is fixedly connected to the inner lining of the pipe body 1, the stainless steel layer 5 is bent and laid outside the two ends of the pipe body 1, the pipe body 1 interface port forms a gap 6 with the stainless steel layer 5, the two gaps 6 of the upper and lower pipe bodies 1 are connected when the two pipe bodies 1 are butted and connected, and a sealing ring is arranged in the gap 6, the clamp 7 is clamped in the limiting groove 2 when the two pipe bodies 1 are butted and connected, the stainless steel layer 5 is laid outside the two ends of the pipe body 1, an arc convex is arranged on one side, and an arc concave is arranged on the other side, the arc convex and the arc concave are clamped when the upper and lower pipes are butted, and the limiting effect is achieved, so that the butting is faster and more convenient.

[0027] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and deformations can be made to the embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A high-sealing grooved pipe fitting, characterized in that: The fitting includes a pipe body (1) and a sealing sleeve (4). The pipe body (1) has a limiting groove (2) on the outer side wall at both ends. The pipe body (1) has an embedding groove (3) near the end face. The embedding groove (3) is located between the limiting groove (2) and the end face of the pipe body (1). The sealing sleeve (4) is a columnar sleeve. The two ends of the sealing sleeve have inwardly bent flanges (41). When two pipe bodies (1) are connected vertically, the flanges (41) are embedded in the embedding groove (3).

2. The high-sealing grooved pipe fitting according to claim 1, characterized in that: The embedded groove (3) is L-shaped and includes a horizontal groove (31) and a vertical groove (32). Friction patterns (33) are provided on the groove wall and at the bend of the vertical groove (32), and fine raised patterns are provided on the outer wall of the flange (41).

3. The high-sealing grooved pipe fitting according to claim 1, characterized in that: After the upper and lower ends of the pipe body (1) are connected, the distance between the embedded groove (3) between the upper and lower pipe bodies (1) is greater than the axial length of the sealing sleeve (4).

4. A high-sealing grooved pipe fitting according to claim 1, characterized in that: The inner lining of the pipe body (1) is fixedly connected with a stainless steel layer (5). The stainless steel layer (5) is bent and laid on the outer side of both ends of the pipe body (1). The joint end of the pipe body (1) forms a notch (6) with the stainless steel layer (5). When the two pipe bodies (1) are connected vertically, the two notches (6) of the upper and lower pipe bodies (1) are connected, and a sealing ring (8) is provided inside.

5. A high-sealing grooved pipe fitting according to claim 1, characterized in that: When the two pipe fitting bodies (1) are connected vertically, a clamp (7) is engaged in the limiting groove (2).

6. A high-sealing grooved pipe fitting according to claim 4, characterized in that: The stainless steel layer (5) is laid on the outer part of both ends of the pipe body (1), with a circular arc protrusion on one side and a circular arc depression on the other side.

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