Linear crimping pipe fitting

Abstract

The utility model relates to the technical field of pipe fitting connection, and discloses a linear crimping pipe fitting which comprises a pipe fitting body, a stainless steel sleeve arranged outside the pipe fitting body in a sleeving mode and a connecting piece arranged on the pipe fitting body and used for being connected with the stainless steel sleeve. An annular first sealing groove is formed in the outer wall of the clamping end in the circumferential direction, a first sealing ring is arranged in the first sealing groove in a sleeved mode, and the distance between the first sealing ring and the stainless steel sleeve is not smaller than the distance between the outer wall of the clamping end and the stainless steel sleeve. The utility model has the effect of preventing the pressure leakage of the pipe fitting.

Description

Technical Field

[0001] The utility model relates to the technical field of pipe fitting connection, in particular to a linear crimping pipe fitting. Background Art

[0002] Flexible pipes for construction (PE-RT, PE-Xb, aluminum-plastic composite pipes, etc.) can be connected using compression fittings.

[0003] Traditional compression fitting seals and pipe fittings use interference fit, that is, the outer diameter of the seal is larger than the inner diameter of the matching pipe, and a certain sealing effect can be produced after the pipe is inserted into the fitting; but in the actual installation process, multiple pipe fittings in an area are often inserted and then crimped together, which inevitably causes some pipe fittings to leak pressure (i.e., no crimping). The subsequent pressure test is difficult to detect because the sealing ring has produced a sealing effect, but it will cause the pipe to fall off after being used for a period of time. In addition, the printed pipe and seal have an interference fit, so the pipe needs to be fully chamfered during installation, otherwise the right-angle pipe end face or the end face with burrs can easily squeeze the seal out of place or damage it, causing leakage. Utility Model Content

[0004] The utility model aims to provide a linear compression pipe fitting, which has the effect of preventing the pipe fitting from leaking pressure.

[0005] The above technical purpose of the utility model is achieved through the following technical scheme: it includes a pipe body, a stainless steel sleeve sleeved outside the pipe body, and a connecting piece arranged on the pipe body for connecting the stainless steel sleeve, the pipe body includes a fixed end and a cylindrical clamping end, there is a set distance between the inner wall of the stainless steel sleeve and the outer wall of the clamping end, the outer wall of the clamping end is provided with an annular first sealing groove along the circumferential direction, a first sealing ring is sleeved in the first sealing groove, the distance between the first sealing ring and the stainless steel sleeve is not less than the distance between the outer wall of the clamping end and the stainless steel sleeve, the outer wall of the clamping end is provided with an annular first connecting groove and a second connecting groove along the circumferential direction, the first connecting groove and the second connecting groove are respectively located on both sides of the first sealing groove.

[0006] The utility model is further configured as follows: the first sealing groove includes a first sealing portion with a rectangular cross-section and a second sealing portion with a triangular cross-section, the first sealing ring is movably fitted to the inner wall of the first sealing portion, and a first sealing angle is formed between the second sealing portion and the outer wall of the clamping end, and the first sealing angle is greater than 90°.

[0007] The utility model is further configured as follows: a second sealing angle is formed between the first sealing portion and the outer wall of the clamping end, and both the first sealing angle and the second sealing angle are chamfered.

[0008] The utility model is further configured as follows: an annular second sealing groove is opened on the outer wall of the clamping end along the circumferential direction, a second sealing ring is sleeved in the second sealing groove, and the distance between the second sealing ring and the stainless steel sleeve is not less than the distance between the outer wall of the clamping end and the stainless steel sleeve.

[0009] The utility model is further configured as follows: the first connecting groove and the second connecting groove are both located between the second sealing groove and the fixed end.

[0010] The utility model is further configured as follows: the second sealing groove includes a third sealing portion with a rectangular cross-section and a fourth sealing portion with a triangular cross-section, the second sealing ring is movably fitted to the inner wall of the third sealing portion, the fourth sealing portion is parallel to the second sealing portion, and a third sealing angle is formed between the fourth sealing portion and the outer wall of the clamping end, and the third sealing angle is greater than 90°.

[0011] The utility model is further configured as follows: a fourth sealing angle is formed between the third sealing portion and the outer wall of the clamping end, and both the third sealing angle and the fourth sealing angle are chamfered.

[0012] The utility model is further configured as follows: the first connecting groove is located between the fixed end and the second connecting groove, the cross-sections of the first connecting groove and the second connecting groove are both right-angled triangles, a first connecting angle of 90° is formed between a side of the first connecting groove away from the fixed end and an outer wall of the clip-on end, a second connecting angle greater than 90° is formed between a side of the first connecting groove close to the fixed end and the outer wall of the clip-on end, a third connecting angle of 90° is formed between a side of the second connecting groove away from the fixed end and the outer wall of the clip-on end, and a fourth connecting angle greater than 90° is formed between a side of the second connecting groove close to the fixed end and the outer wall of the clip-on end.

[0013] The utility model is further configured as follows: the first connection angle, the second connection angle, the third connection angle and the fourth connection angle are all rounded.

[0014] The utility model is further configured as follows: an outer wall of the clamping end is provided with an annular third connecting groove along the circumferential direction, the third connecting groove is located between the fixed end and the first connecting groove, and the connection between the third connecting groove and the outer wall of the clamping end is chamfered.

[0015] The beneficial effects of the utility model are:

[0016] 1. By setting the first sealing groove, the first connecting groove and the second connecting groove, when it is necessary to fix multiple flexible pipes at the same time, first insert the ends of the multiple flexible pipes between the corresponding stainless steel sleeves and the clamping ends. Since the distance between the first sealing ring and the stainless steel sleeve is not less than the distance between the outer wall of the clamping end and the stainless steel sleeve, it means that the end of the first sealing ring will not extend out of the first sealing groove. After the flexible pipe is inserted into the pipe fitting, there is a certain distance between the inner wall of the flexible pipe and the outer wall of the clamping end and the first sealing ring. Therefore, the first sealing ring does not play a sealing role before crimping. Then, a special clamping tool is used to apply pressure to the multiple stainless steel sleeves in turn to force the stainless steel sleeves and the flexible pipes to deform, so that the flexible pipes The pipe is embedded in the first connecting groove and the second connecting groove, thereby realizing the connection of multiple flexible pipes, and then a pressure test is carried out. If there is a pressure leakage of the flexible pipe (that is, the clamping tool is not used to apply pressure in some places to force the stainless steel sleeve and the flexible pipe to deform), the pressure test will indicate that there is a leakage, thereby reminding the installer to pay attention to the investigation to avoid the pressure leakage of the flexible pipe and eliminate the hidden dangers after use; at the same time, after the flexible pipe is inserted into the pipe fitting, there is a certain distance between the inner wall of the flexible pipe and the outer wall of the clamping end and the first sealing ring. Therefore, when installing the flexible pipe, the end of the flexible pipe does not need to be chamfered, thereby reducing the need to carry special tools and making the installation more convenient.

[0017] 2. By setting the first sealing part and the second sealing part, during crimping, the first sealing ring can be driven to deform toward the side away from the second sealing part, and at the same time, the flexible tube can be embedded in the second sealing part and the first sealing part, thereby increasing the connection area between the flexible tube and the first sealing groove, improving the connection effect between the flexible tube and the first sealing ring, and ensuring the sealing effect of the first sealing ring.

[0018] 3. By setting the second sealing groove and the fourth sealing part being parallel to the second sealing part, the sealing effect on the flexible pipe can be further improved by the second sealing ring. At the same time, the assembly positions of the first sealing ring and the second sealing ring are fixed. The deformation direction of the flexible pipe can be changed by the positions of the second sealing part and the fourth sealing part (that is, the second sealing part is set between the first sealing part and the third sealing part, or the fourth sealing part is set between the first sealing part and the third sealing part). In addition, the deformation directions of the first sealing ring and the second sealing ring are consistent during crimping, thereby ensuring the crimping effect between the flexible pipe and the pipe fitting. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 It is a structural schematic diagram of an embodiment of a linear crimping pipe fitting of the utility model;

[0021] Figure 2 It is a structural schematic diagram of a linear compression pipe fitting and a flexible pipe of the utility model;

[0022] Figure 3 yes Figure 2 A is an enlarged schematic diagram;

[0023] Figure 4 The utility model is a schematic structural diagram of a linear crimping pipe fitting and a flexible pipe after crimping.

[0024] In the figure, 1, pipe body; 1a, fixed end; 1b, clamping end; 2, stainless steel sleeve; 3, connecting piece; 4, first sealing groove; 4a, first sealing part; 4b, second sealing part; 5, first sealing ring; 6, first connecting groove; 7, second connecting groove; 8, first sealing angle; 9, second sealing angle; 10, second sealing groove; 10a, third sealing part; 10b, fourth sealing part; 11, second sealing ring; 12, third sealing angle; 13, fourth sealing angle; 14, first connecting angle; 15, second connecting angle; 16, third connecting angle; 17, fourth connecting angle; 18, third connecting groove; 19, flexible pipe. DETAILED DESCRIPTION

[0025] The technical solution of the utility model will be described clearly and completely below in conjunction with specific embodiments. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] The utility model provides a linear compression pipe fitting, such as Figures 1 to 4As shown, it includes a pipe body 1, a stainless steel sleeve 2 sleeved on the outside of the pipe body 1, and a connecting piece 3 arranged on the pipe body 1 for connecting the stainless steel sleeve 2, the pipe body 1 includes a fixed end 1a and a cylindrical clamping end 1b, there is a set distance between the inner wall of the stainless steel sleeve 2 and the outer wall of the clamping end 1b, the outer wall of the clamping end 1b is provided with an annular first sealing groove 4 along the circumferential direction, a first sealing ring 5 is sleeved in the first sealing groove 4, the distance between the first sealing ring 5 and the stainless steel sleeve 2 is not less than the distance between the outer wall of the clamping end 1b and the stainless steel sleeve 2, the outer wall of the clamping end 1b is provided with an annular first connecting groove 6 and a second connecting groove 7 along the circumferential direction, the first connecting groove 6 and the second connecting groove 7 are respectively located on both sides of the first sealing groove 4.

[0027] Furthermore, the first sealing groove 4 includes a first sealing portion 4a with a rectangular cross-section and a second sealing portion 4b with a triangular cross-section. The first sealing ring 5 is movably fitted to the inner wall of the first sealing portion 4a. A first sealing angle 8 is formed between the second sealing portion 4b and the outer wall of the clamping end 1b. The first sealing angle 8 is greater than 90°.

[0028] Furthermore, a second sealing angle 9 is formed between the first sealing portion 4a and the outer wall of the clamping end 1b, and both the first sealing angle 8 and the second sealing angle 9 are chamfered.

[0029] Furthermore, a second annular sealing groove 10 is opened on the outer wall of the clamping end 1b along the circumferential direction, and a second sealing ring 11 is sleeved in the second sealing groove 10. The distance between the second sealing ring 11 and the stainless steel sleeve 2 is not less than the distance between the outer wall of the clamping end 1b and the stainless steel sleeve 2.

[0030] Furthermore, the first connecting groove 6 and the second connecting groove 7 are both located between the second sealing groove 10 and the fixing end 1 a .

[0031] Furthermore, the second sealing groove 10 includes a third sealing portion 10a with a rectangular cross-section and a fourth sealing portion 10b with a triangular cross-section, the second sealing ring 11 is movably fitted to the inner wall of the third sealing portion 10a, the fourth sealing portion 10b is parallel to the second sealing portion 4b, and a third sealing angle 12 is formed between the fourth sealing portion 10b and the outer wall of the clamping end 1b, and the third sealing angle 12 is greater than 90°.

[0032] Furthermore, a fourth sealing corner 13 is formed between the third sealing portion 10a and the outer wall of the clamping end 1b, and both the third sealing corner 12 and the fourth sealing corner 13 are rounded.

[0033] Further, the first connecting groove 6 is located between the fixed end 1a and the second connecting groove 7, and the cross-sections of the first connecting groove 6 and the second connecting groove 7 are both right-angled triangles. A first connecting angle 14 of 90° is formed between the side of the first connecting groove 6 away from the fixed end 1a and the outer wall of the clip-on end 1b, a second connecting angle 15 greater than 90° is formed between the side of the first connecting groove 6 close to the fixed end 1a and the outer wall of the clip-on end 1b, a third connecting angle 16 of 90° is formed between the side of the second connecting groove 7 away from the fixed end 1a and the outer wall of the clip-on end 1b, and a fourth connecting angle 17 greater than 90° is formed between the side of the second connecting groove 7 close to the fixed end 1a and the outer wall of the clip-on end 1b.

[0034] Furthermore, the first connection corner 14, the second connection corner 15, the third connection corner 16 and the fourth connection corner 17 are all rounded.

[0035] Furthermore, an annular third connecting groove 18 is formed on the outer wall of the clamping end 1b along the circumferential direction, and the third connecting groove 18 is located between the fixed end 1a and the first connecting groove 6. The connection between the third connecting groove 18 and the outer wall of the clamping end 1b is chamfered.

[0036] When it is necessary to fix multiple flexible pipes 19 at the same time, first insert the ends of the multiple flexible pipes 19 between the corresponding stainless steel sleeves 2 and the clamping end 1b. Since the distance between the first sealing ring 5, the second sealing ring 11 and the stainless steel sleeve 2 is not less than the distance between the outer wall of the clamping end 1b and the stainless steel sleeve 2, it means that the ends of the first sealing ring 5 and the second sealing ring 11 will not extend out of the first sealing groove 4. After the flexible pipe 19 is inserted into the pipe fitting, there is a certain distance between the inner wall of the flexible pipe 19 and the outer wall of the clamping end 1b, the first sealing ring 5 and the second sealing ring 11. Therefore, the first sealing ring 5 and the second sealing ring 11 do not play a sealing role before crimping. Then, a special clamping tool is used to apply pressure to the multiple stainless steel sleeves 2 in turn to force the stainless steel sleeves 2 and the flexible pipes 19 to deform, so that the flexible pipes 19 It is embedded in the first connecting groove 6, the second connecting groove 7 and the third connecting groove 18, thereby realizing the connection of multiple flexible pipes 19, and then a pressure test is carried out. If there is a pressure leakage of the flexible pipe 19 (that is, the clamping tool is not used to apply pressure in some places to force the stainless steel sleeve 2 and the flexible pipe 19 to deform), the pressure test will indicate that there is a leakage, thereby reminding the installation personnel to pay attention to the investigation to avoid the pressure leakage of the flexible pipe 19 and eliminate the hidden dangers after use; at the same time, after the flexible pipe 19 is inserted into the pipe fitting, there is a certain distance between the inner wall of the flexible pipe 19 and the outer wall of the clamping end 1b, the first sealing ring 5 and the second sealing ring 11. Therefore, when installing the flexible pipe 19, the end of the flexible pipe 19 does not need to be chamfered, thereby reducing the need to carry special tools and making the installation more convenient.

[0037] By setting the first sealing part 4a and the second sealing part 4b, during crimping, the first sealing ring 5 can be driven to deform toward the side away from the second sealing part 4b, and at the same time, the flexible tube 19 can be embedded in the second sealing part 4b and the first sealing part 4a, thereby increasing the connection area between the flexible tube 19 and the first sealing groove 4, improving the connection effect between the flexible tube 19 and the first sealing ring 5, and ensuring the sealing effect of the first sealing ring 5.

[0038] By providing the second sealing groove 10 and the fourth sealing portion 10b being parallel to the second sealing portion 4b, the sealing effect on the flexible tube 19 can be further improved by the second sealing ring 11. At the same time, the assembly positions of the first sealing ring 5 and the second sealing ring 11 are fixed, and the deformation direction of the flexible tube 19 can be changed by the positions of the second sealing portion 4b and the fourth sealing portion 10b (that is, the second sealing portion 4b is arranged between the first sealing portion 4a and the third sealing portion 10a, or the fourth sealing portion 10b is arranged between the first sealing portion 4a and the third sealing portion 10a). In addition, the deformation directions of the first sealing ring 5 and the second sealing ring 11 are consistent during crimping, thereby ensuring the crimping effect between the flexible tube 19 and the pipe fitting.

[0039] By rounding the first sealing corner 8 , the second sealing corner 9 , the third sealing corner 12 and the fourth sealing corner 13 , scratching of the inner wall of the flexible tube 19 during the crimping process can be avoided.

[0040] By setting the first connecting groove 6 and the second connecting groove 7 with a right-angled triangle cross-section, the flexible tube 19 is embedded in the first connecting groove 6 and the second connecting groove 7 after crimping. Since the first connecting groove 6 and the second connecting groove 7 are on a right-angled side away from the fixed end 1a, the tensile resistance of the flexible tube 19 can be increased.

[0041] By rounding the first connection corner 14 , the second connection corner 15 , the third connection corner 16 and the fourth connection corner 17 , scratching of the inner wall of the flexible tube 19 during the crimping process can be avoided.

[0042] By providing a third connection groove 18 at one end of the clamping end 1b close to the fixed end 1a, the connection between the flexible pipe 19 and the pipe fitting after crimping can be further enhanced.

[0043] It should be noted that the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0044] The above description is only a description of the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention. Any changes or modifications made by a person skilled in the art in the field of the present invention based on the above disclosure shall fall within the scope of protection of the claims.

Claims

1. A linear crimping pipe fitting, characterized in that: The invention comprises a pipe body (1), a stainless steel sleeve (2) sleeved outside the pipe body (1), and a connecting piece (3) arranged on the pipe body (1) and used for connecting the stainless steel sleeve (2). The pipe body (1) comprises a fixed end (1a) and a cylindrical clamping end (1b). There is a set distance between the inner wall of the stainless steel sleeve (2) and the outer wall of the clamping end (1b). The outer wall of the clamping end (1b) is provided with an annular first sealing groove (4) along the circumferential direction. A first sealing ring (5) is sleeved inside the first sealing groove (4). The distance between the first sealing ring (5) and the stainless steel sleeve (2) is not less than the distance between the outer wall of the clamping end (1b) and the stainless steel sleeve (2). The outer wall of the clamping end (1b) is provided with an annular first connecting groove (6) and a second connecting groove (7) along the circumferential direction. The first connecting groove (6) and the second connecting groove (7) are respectively located on both sides of the first sealing groove (4).

2. A linear crimping pipe fitting according to claim 1, characterized in that: The first sealing groove (4) comprises a first sealing portion (4a) with a rectangular cross-section and a second sealing portion (4b) with a triangular cross-section, the first sealing ring (5) is movably fitted to the inner wall of the first sealing portion (4a), and a first sealing angle (8) is formed between the second sealing portion (4b) and the outer wall of the clamping end (1b), and the first sealing angle (8) is greater than 90°.

3. A linear crimping pipe fitting according to claim 2, characterized in that: A second sealing angle (9) is formed between the first sealing portion (4a) and the outer wall of the clamping end (1b), and both the first sealing angle (8) and the second sealing angle (9) are rounded.

4. A linear crimping pipe fitting according to claim 2, characterized in that: An annular second sealing groove (10) is provided on the outer wall of the clamping end (1b) along the circumferential direction, a second sealing ring (11) is sleeved in the second sealing groove (10), and the distance between the second sealing ring (11) and the stainless steel sleeve (2) is not less than the distance between the outer wall of the clamping end (1b) and the stainless steel sleeve (2).

5. A linear crimping pipe fitting according to claim 4, characterized in that: The first connecting groove (6) and the second connecting groove (7) are both located between the second sealing groove (10) and the fixed end (1a).

6. A linear crimping pipe fitting according to claim 5, characterized in that: The second sealing groove (10) comprises a third sealing portion (10a) with a rectangular cross-section and a fourth sealing portion (10b) with a triangular cross-section, the second sealing ring (11) is movably fitted to the inner wall of the third sealing portion (10a), the fourth sealing portion (10b) is parallel to the second sealing portion (4b), and a third sealing angle (12) is formed between the fourth sealing portion (10b) and the outer wall of the clamping end (1b), and the third sealing angle (12) is greater than 90°.

7. A linear crimping pipe fitting according to claim 6, characterized in that: A fourth sealing angle (13) is formed between the third sealing portion (10a) and the outer wall of the clamping end (1b), and both the third sealing angle (12) and the fourth sealing angle (13) are rounded.

8. The linear crimping pipe fitting according to claim 1, characterized in that: The first connecting groove (6) is located between the fixed end (1a) and the second connecting groove (7); the cross-sections of the first connecting groove (6) and the second connecting groove (7) are both right triangles; a first connecting angle (14) of 90° is formed between the side of the first connecting groove (6) away from the fixed end (1a) and the outer wall of the clamping end (1b); a second connecting angle (15) greater than 90° is formed between the side of the first connecting groove (6) close to the fixed end (1a) and the outer wall of the clamping end (1b); a third connecting angle (16) of 90° is formed between the side of the second connecting groove (7) away from the fixed end (1a) and the outer wall of the clamping end (1b); and a fourth connecting angle (17) greater than 90° is formed between the side of the second connecting groove (7) close to the fixed end (1a) and the outer wall of the clamping end (1b).

9. A linear crimping pipe fitting according to claim 8, characterized in that: The first connecting angle (14), the second connecting angle (15), the third connecting angle (16) and the fourth connecting angle (17) are all rounded.

10. A linear crimping pipe fitting according to claim 8, characterized in that: An outer wall of the clamping end (1b) is provided with an annular third connecting groove (18) along the circumferential direction; the third connecting groove (18) is located between the fixed end (1a) and the first connecting groove (6); and the connection between the third connecting groove (18) and the outer wall of the clamping end (1b) is chamfered.

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