Hough type connecting pipe fitting

Abstract

The invention discloses a Haff type connecting pipe fitting. The Haff type connecting pipe fitting comprises a first connecting pipe fitting body, a second connecting pipe fitting body, a fastening piece and a sealing piece. The first connecting pipe fitting and the second connecting pipe fitting have the same structure; the middle of the first connecting pipe fitting is bent to form a semicircular sleeve, the semicircular sleeve is provided with a positioning groove and two anti-drawing structures distributed on the two sides of the positioning groove in the circumferential direction of the sleeve, and the sealing piece is arranged in the positioning groove. The two ends of the first connecting pipe fitting and the two ends of the second connecting pipe fitting are fixed together in the mode that fasteners sequentially penetrate through the through holes and the stretching threaded holes respectively. The ends of the two stainless steel pipes are connected in a touch mode and arranged in a tubular space formed by the two semicircular sleeves in a sleeved mode, the sealing piece surrounds and is attached to the connecting position of the two stainless steel pipes, and the annular clamping pieces of the two stainless steel pipes are embedded into the two anti-drawing structures respectively. The equipment is high in drawing resistance, high in bending resistance, good in sealing performance, convenient and fast to install, stable in connection and capable of reducing safety accidents.

Description

Technical Field

[0001] The invention relates to the technical field of pipe fittings, and in particular to a Hough type connecting pipe fitting. Background Art

[0002] During the use of pipes in the water supply and drainage system, damage and leakage may occur due to various reasons, so they need to be repaired in time. During the repair, the existing technology generally uses clamp groove pipe fittings for connection, which have weak tensile strength, weak bending resistance, inconvenient installation, and easy to leak. Summary of the invention

[0003] The purpose of the present invention is to overcome the above-mentioned deficiencies of the prior art and provide a Hough type connecting pipe fitting.

[0004] The present invention is realized by the following technical scheme: a half-type connecting pipe fitting, used for connecting two sections of stainless steel pipes, an annular clamping piece surrounding the steel pipe is arranged at the ends of the two sections of stainless steel pipes close to each other, the half-type connecting pipe fitting comprises a first connecting pipe fitting, a second connecting pipe fitting, a fastener and a sealing piece; the first connecting pipe fitting has the same structure as the second connecting pipe fitting; the middle part of the first connecting pipe fitting is bent to form a semicircular sleeve, a positioning groove is opened in the middle part of the semicircular sleeve along the circumferential direction of the sleeve, the sealing piece is arranged in the positioning groove, and the semicircular sleeves on both sides of the positioning groove are provided with fasteners that are in contact with the sleeve. Its parallel anti-pullout structure; both ends of the first connecting pipe are provided with alternately distributed stretching threaded holes and through holes, and the two ends of the first connecting pipe and the two ends of the second connecting pipe are respectively fixed together by the fasteners that penetrate through holes and stretching threaded holes in sequence; between the upper and lower connecting pipes, the through holes and the stretching threaded holes are positioned oppositely and distributed in pairs; the ends of the two sections of stainless steel pipes are touched and connected and are sleeved in the tubular space formed by two semicircular sleeves, the sealing member surrounds and fits the connection between the two sections of stainless steel pipes, and the annular clamps of the two sections of stainless steel pipes are respectively embedded with the two anti-pullout structures.

[0005] The two connecting pipes are fixed together by fasteners passing through the through holes and the stretched threaded holes in sequence; the seal can seal the connection between the two sections of stainless steel pipes to prevent leakage; the annular clamp and the anti-pullout structure are interlocked with each other, which can stably connect the connecting pipe and the stainless steel pipe to avoid falling off, and has strong pull-out resistance and strong resistance to bending.

[0006] The sealing member is an E-shaped sealing ring with an E-shaped cross section.

[0007] With the side of the E-shaped sealing ring close to the positioning groove as the outer side, the two ends of the E-shaped sealing ring are horizontally folded inwards and then folded inwards toward the inner center line of the E-shaped sealing ring to form a folded edge, and the folded edge is tightly attached to the outer wall of the stainless steel pipe; the inner middle part of the E-shaped sealing ring extends inwards to form a support member, and the support member is attached to the connection of the two sections of stainless steel pipes. The support member of the E-shaped sealing ring can compensate for the expansion of the connection of the two sections of stainless steel pipes.

[0008] The corners of the positioning groove are arc structures, and the corners of the E-shaped sealing ring are all arc structures; the folded edge is folded inward from the end of the E-shaped sealing ring to form an inclined surface, the connection between the folded edge and the outer end of the E-shaped sealing ring is the root of the folded edge, the end of the folded edge located in the middle of the inner side of the E-shaped sealing ring is the free end of the folded edge, and the distance between the free end of the folded edge and the outer side of the E-shaped sealing ring is greater than the distance between the root of the folded edge and the outer side of the E-shaped sealing ring. The inclined folded edge pushes the steel pipe outward when there is positive pressure, and the airflow can enter from the folded edge when there is negative pressure, and the folded edge can maintain sealing.

[0009] The annular clamp is a circle of first annular clamping groove formed by the outer surface of the stainless steel pipe being recessed toward the inside of the pipe, and the anti-pull-out structure is a circle of first raised ring formed by extending outward from the surface of the semicircular sleeve, and the first raised ring is clamped in the first annular clamping groove.

[0010] The annular clamp is a second raised ring that protrudes from the outer surface of the stainless steel pipe and surrounds the outer circumference of the steel pipe. The anti-pull-out structure is a second annular groove formed by the surface of the semicircular sleeve being recessed inwardly. The second raised ring is clamped in the second annular groove.

[0011] The E-shaped sealing ring is a sealing ring made of EPDM rubber, 26 fluororubber, silicone rubber, nitrile rubber or butyl rubber.

[0012] The first connecting pipe fitting is a pipe fitting made of ferritic stainless steel, austenitic stainless steel or duplex stainless steel.

[0013] Ferritic stainless steel should be made of S1163, S12793 or S12773 stainless steel; austenitic stainless steel should be made of S30408 ​​or S31603 stainless steel; duplex stainless steel should be made of duplex stainless steel S22053 stainless steel.

[0014] Both ends of the first connecting pipe are provided with three holes, which are arranged alternately by stretch threaded holes and through holes and staggered in position; the fasteners are bolts, which pass through the through holes and are tightened in the stretch threaded holes.

[0015] Compared with the prior art, the advantages of the present invention are: the equipment has strong pull-out resistance, strong bending resistance, good sealing, convenient installation, stable connection, and can reduce the occurrence of safety accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a bottom view of a single connecting pipe fitting and a single stainless steel pipe when assembled in Example 1 of the present invention;

[0017] Figure 2 This is a schematic structural diagram of a sealing member in Example 1 of the present invention;

[0018] Figure 3 It is a side view of embodiment 1 of the present invention;

[0019] Figure 4 This is a bottom view of a single connecting pipe fitting and a single stainless steel pipe assembled in Example 2 of the present invention.

[0020] The meanings of the reference numerals in the figure are: 1. first connecting pipe fitting; 2. second connecting pipe fitting; 3. semicircular sleeve; 4. positioning groove; 5. sealing member; 51. folded edge; 52. supporting member; 6. annular clamp; 7. anti-pull-out structure; 8. through hole; 9. tensile threaded hole; 10. stainless steel pipe. DETAILED DESCRIPTION

[0021] The content of the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0022] Example 1

[0023] See also Figures 1 to 3 , is a half-type connecting pipe fitting, used for connecting two sections of stainless steel pipes 10, an annular clamp 6 surrounding the steel pipe is arranged at the adjacent ends of the two sections of stainless steel pipes 10, and the half-type connecting pipe fitting comprises a first connecting pipe fitting 1, a second connecting pipe fitting 2, a fastener and a sealing member 5; the first connecting pipe fitting 1 has the same structure as the second connecting pipe fitting 2; the middle part of the first connecting pipe fitting 1 is bent to form a semicircular sleeve 3, a positioning groove 4 is opened in the middle part of the semicircular sleeve 3 along the circumferential direction of the sleeve, the sealing member 5 is arranged in the positioning groove 4, and the semicircular sleeve 3 on both sides of the positioning groove 4 is provided with a pull-out resistant member parallel to the semicircular sleeve 3. Structure 7; both ends of the first connecting pipe fitting 1 are provided with alternately distributed stretching threaded holes 9 and through holes 8, and the two ends of the first connecting pipe fitting 1 and the two ends of the second connecting pipe fitting 2 are fixed together by fasteners that penetrate through holes 8 and stretching threaded holes 9 in sequence; between the upper and lower connecting pipe fittings, the through holes 8 and the stretching threaded holes 9 are positioned opposite to each other and distributed in pairs; the ends of the two sections of stainless steel pipes 10 are touched and connected and are sleeved in the tubular space formed by two semicircular sleeves 3, the sealing member 5 surrounds and fits the connection between the two sections of stainless steel pipes 10, and the annular clamps 6 of the two sections of stainless steel pipes 10 are respectively embedded with the two anti-pull-out structures 7.

[0024] The two connecting pipes are fixed together by fasteners passing through the through hole 8 and the stretched threaded hole 9 in sequence; the seal 5 can seal the connection between the two sections of the stainless steel pipe 10 to prevent leakage; the annular clamp 6 and the anti-pull-out structure 7 are interlocked with each other, which can stably connect the connecting pipe and the stainless steel pipe 10 to avoid falling off, and has strong pull-out resistance and strong resistance to bending.

[0025] The sealing member 5 is an E-shaped sealing ring with an E-shaped cross section.

[0026] With the side of the E-shaped sealing ring close to the positioning groove 4 as the outer side, the two ends of the E-shaped sealing ring are horizontally folded inward and then folded toward the inner center line direction of the E-shaped sealing ring to form a folded edge 51, and the folded edge 51 is closely attached to the outer wall of the stainless steel pipe 10; the inner middle part of the E-shaped sealing ring extends inward to form a support member 52, and the support member 52 is attached to the connection of the two sections of the stainless steel pipe 10. The support member 52 of the E-shaped sealing ring can compensate for the expansion of the connection of the two sections of the stainless steel pipe 10.

[0027] The corners of the positioning groove 4 are arc structures, and the corners of the E-shaped sealing ring are all arc structures; the folded edge 51 is folded inward from the end of the E-shaped sealing ring to form an inclined surface, the connection between the folded edge 51 and the outer end of the E-shaped sealing ring is the root of the folded edge 51, and the end of the folded edge 51 located in the middle of the inner side of the E-shaped sealing ring is the free end of the folded edge 51. The distance between the free end of the folded edge 51 and the outer side of the E-shaped sealing ring is greater than the distance between the root of the folded edge 51 and the outer side of the E-shaped sealing ring. The inclined folded edge 51 pushes the steel pipe outward when there is positive pressure, and the airflow can enter from the folded edge 51 when there is negative pressure. The folded edge 51 can fit the steel pipe more tightly to maintain the sealing performance.

[0028] The annular clamp 6 is a second raised ring that is raised from the outer surface of the stainless steel pipe 10 and surrounds the outer circumference of the steel pipe. The anti-pullout structure 7 is a second annular groove that is recessed from the surface of the semicircular sleeve 3 and formed inwardly. The second raised ring is clamped in the second annular groove.

[0029] The E-shaped sealing ring is made of EPDM rubber, 26 fluororubber, silicone rubber, nitrile rubber or butyl rubber.

[0030] The first connecting pipe fitting 1 is a pipe fitting made of ferritic stainless steel, austenitic stainless steel or duplex stainless steel.

[0031] Ferritic stainless steel uses S1163, S12793 or S12773 stainless steel; austenitic stainless steel uses S30408 ​​or S31603 stainless steel; duplex stainless steel uses duplex stainless steel S22053 stainless steel. Among them, S1163, S12793, S12773, S30408, S31603, S22053 are the grades or types of stainless steel, usually composed of a series of numbers and letters, which represent the specific chemical composition and performance characteristics of the steel.

[0032] Three holes are formed at both ends of the first connecting pipe 1 , and the holes are arranged alternately by stretch threaded holes 9 and through holes 8 and staggered; the fasteners are bolts, which pass through the through holes 8 and are tightened in the stretch threaded holes 9 .

[0033] Example 2

[0034] See also Figure 4 The difference between Example 2 and Example 1 is that the annular clamping member 6 is a circle of first annular clamping groove formed by the outer surface of the stainless steel pipe 10 being recessed toward the inside of the pipe, and the anti-pull-out structure 7 is a circle of first raised ring formed by extending outward from the surface of the semicircular sleeve 3, and the first raised ring is clamped in the first annular clamping groove.

[0035] In this embodiment, the first connecting pipe fitting 1 is formed by a one-time stamping method. The hole positions of the first connecting pipe fitting 1 and the second connecting pipe fitting 2 are staggered. When the hole position of the designated position of a connecting pipe fitting is a through hole 8, the corresponding hole position of the second connecting pipe fitting 2 that is engaged therewith is a stretched threaded hole 9. At this time, a bolt is first passed through the through hole 8 and then tightened in the stretched threaded hole 9 to fix a pair of hole positions of the two connecting pipe fittings. The through hole 8 of the connecting pipe fitting reserves bolt clearance, and the stretched threaded hole 9 can increase the number of threads and the strength of the internal thread. When installing the half-type connecting pipe fitting on the steel pipe, it is convenient to avoid the complexity of not using nuts and reduce the occurrence of safety accidents.

[0036] During installation, the first connecting pipe fitting 1 and the second connecting pipe fitting 2 are combined into a set, the E-shaped sealing ring is inserted into the positioning groove 4, and the through hole 8 and the stretched threaded hole 9 are tightened with bolts. The tightening should be done with balanced force.

[0037] In this embodiment, the fastener bolts are not shown in the figure, and the figure only shows the effect of installing a single-side stainless steel pipe 10.

[0038] The above detailed description is a specific description of a feasible embodiment of the present invention. The embodiment is not intended to limit the patent scope of the present invention. Any equivalent implementation or modification that does not deviate from the present invention should be included in the patent scope of this case.

Claims

1. A Hough type connecting pipe fitting, used to connect two sections of stainless steel pipes, characterized in that: An annular clamp surrounding the steel pipe is provided at the ends of the two sections of stainless steel pipes that are close to each other. The half-type connecting pipe fitting includes a first connecting pipe fitting, a second connecting pipe fitting, a fastener and a seal; the first connecting pipe fitting has the same structure as the second connecting pipe fitting; the middle of the first connecting pipe fitting is bent to form a semicircular sleeve, a positioning groove is provided at the middle position of the semicircular sleeve along the circumferential direction of the sleeve, the seal is arranged in the positioning groove, and the semicircular sleeves on both sides of the positioning groove are provided with a pull-out resistant structure parallel to the positioning groove; the first connecting pipe fitting has two ends. Both ends are provided with stretch threaded holes and through holes that are alternately distributed, and the two ends of the first connecting pipe fitting and the two ends of the second connecting pipe fitting are fixed together by the fasteners that penetrate through holes and stretch threaded holes in sequence; between the upper and lower connecting pipe fittings, the through holes and the stretch threaded holes are positioned opposite to each other and distributed in pairs; the ends of the two sections of stainless steel pipes are touched and connected and are sleeved in a tubular space formed by two semicircular sleeves, the sealing member surrounds and fits the connection between the two sections of stainless steel pipes, and the annular clamps of the two sections of stainless steel pipes are respectively embedded with the two anti-pull-out structures.

2. The Hough type connecting pipe fitting according to claim 1, characterized in that: The sealing member is an E-shaped sealing ring with an E-shaped cross section.

3. The Hough type connecting pipe fitting according to claim 2, characterized in that: With the side of the E-shaped sealing ring close to the positioning groove as the outer side, the two ends of the E-shaped sealing ring are folded horizontally inward and then folded toward the inner center line direction of the E-shaped sealing ring to form a folded edge, and the folded edge is tightly attached to the outer wall of the stainless steel pipe; the middle part of the inner side of the E-shaped sealing ring extends inward to form a support member, and the support member fits the connection between the two sections of stainless steel pipes.

4. The Hough type connecting pipe fitting according to claim 3, characterized in that: The corners of the positioning groove are arc structures, and the corners of the E-shaped sealing ring are all arc structures; the folded edge is folded inward from the end of the E-shaped sealing ring to form an inclined surface, the connection between the folded edge and the outer end of the E-shaped sealing ring is the root of the folded edge, and the end of the folded edge located in the middle direction of the inner side of the E-shaped sealing ring is the free end of the folded edge, and the distance between the free end of the folded edge and the outer side surface of the E-shaped sealing ring is greater than the distance between the root of the folded edge and the outer side surface of the E-shaped sealing ring.

5. The Hough type connecting pipe fitting according to claim 1, characterized in that: The annular clamp is a circle of first annular clamping groove formed by the outer surface of the stainless steel pipe being recessed toward the inside of the pipe, and the anti-pull-out structure is a circle of first raised ring formed by extending outward from the surface of the semicircular sleeve, and the first raised ring is clamped in the first annular clamping groove.

6. The Hough type connecting pipe fitting according to claim 1, characterized in that: The annular clamp is a second raised ring that protrudes from the outer surface of the stainless steel pipe and surrounds the outer circumference of the steel pipe. The anti-pull-out structure is a second annular groove formed by the surface of the semicircular sleeve being recessed inwardly. The second raised ring is clamped in the second annular groove.

7. The Hough type connecting pipe fitting according to claim 2, characterized in that: The E-shaped sealing ring is a sealing ring made of EPDM rubber, 26 fluororubber, silicone rubber, nitrile rubber or butyl rubber.

8. The Hough type connecting pipe fitting according to claim 1, characterized in that: The first connecting pipe fitting is a pipe fitting made of ferritic stainless steel, austenitic stainless steel or duplex stainless steel.

9. The Hough type connecting pipe fitting according to claim 8, characterized in that: Ferritic stainless steel should be made of S1163, S12793 or S12773 stainless steel; austenitic stainless steel should be made of S30408 ​​or S31603 stainless steel; duplex stainless steel should be made of duplex stainless steel S22053 stainless steel.

10. The Hough type connecting pipe fitting according to claim 1, characterized in that: Both ends of the first connecting pipe are provided with three holes, which are arranged alternately by stretch threaded holes and through holes and staggered in position; the fasteners are bolts, which pass through the through holes and are tightened in the stretch threaded holes.

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