CN215949486U

CN215949486U - Pipe joint connecting structure

Info

Publication number: CN215949486U
Application number: CN202122109896.5U
Authority: CN
Inventors: 毕程程; 李洋; 程鹏; 李应飞; 王宁
Original assignee: China Railway Engineering Equipment Group Co Ltd CREG
Current assignee: China Railway Engineering Equipment Group Co Ltd CREG
Priority date: 2021-09-02
Filing date: 2021-09-02
Publication date: 2022-03-04
Anticipated expiration: 2031-09-02

Abstract

The utility model relates to a pipe joint connecting structure. The pipe joint connecting structure comprises a first pipe joint and a second pipe joint, wherein each pipe joint comprises a cylindrical pipe body; a socket pipe is arranged at one axial end of the first pipe joint, and the socket pipe protrudes out of the end surface of the first pipe joint, so that the corresponding end of the second pipe joint is sleeved and positioned along the radial direction; the locking piece is used for being clamped between the end faces of the first pipe joint and the second pipe joint; the socket pipe is provided with a connecting hole for fixing the locking piece on the outer side surface of the socket pipe through a fastener; the axial adjacent part of the locking piece and the first pipe joint and the axial adjacent part of the locking piece and the second pipe joint are provided with tenon-and-mortise structures; the mortise and tenon structure comprises a mortise and/or a tenon arranged on the locking sheet and a tenon and/or a mortise correspondingly arranged on the corresponding cylindrical pipe body; the mortise is the binding off structure, and the shape of tenon and mortise fit for form the location along the axial of tube-shape body with the mortise. Above-mentioned scheme can realize the connection of tube coupling under the condition of guaranteeing that the outer wall is smooth.

Description

Pipe joint connecting structure

Technical Field

The utility model relates to a pipe joint connecting structure.

Background

In some applications it is desirable to butt the pipe sections to form a pipe body of the desired length. For example, in the construction process of a tunnel, a jacking pipe is required during pipe curtain construction, and the jacking pipe needs to be gradually added with pipe joints to realize propulsion. All the steel pipe sections of the jacking pipe are usually welded and connected on site, the welding can be manual welding or all-position pipeline automatic welding, although the welding cost is low, the defects of low construction efficiency, high environmental pollution, difficult quality guarantee and the like exist, and in comparison, the non-welded pipe section connection mode has outstanding advantages.

The existing non-welding type pipe joint connecting mode mainly comprises the following steps: 1. spigot-and-socket, i.e. arranging an expansion port at one end of the pipe joint, and inserting and locking the corresponding end of the corresponding pipe joint into the expansion port; 2. the hoop type is that a hoop is sleeved at the pipe joint interface, and pretightening force is applied to the hoop to fix the pipe joint; 3. the flange type is that a flange is arranged at an interface, pipe sections are connected together through the flange, and the flange can be an outer flange or an inner flange.

However, the inner diameter of the small-caliber pipe curtain is usually 30-80 cm, and each pipe joint of the top pipe needs to be pushed into a soil body, so that the outer wall is required to be equal in diameter and smooth, and the socket type, hoop type and outer flange type structures are not suitable for use; the inner diameter of the pipe curtain is smaller, and the inner part of the pipe curtain does not have enough operating space for connecting the inner flange. Therefore, the three common non-welded pipe joint quick connection modes at present are not suitable for the pipe joint with a small diameter.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a pipe joint connecting structure which can realize the connection of pipe joints under the condition of ensuring the flatness of the outer wall.

The utility model adopts the following technical scheme:

the pipe joint connecting structure comprises a first pipe joint and a second pipe joint, and each pipe joint comprises a cylindrical pipe body; a socket pipe is arranged at one axial end of the first pipe joint, and the socket pipe protrudes out of the end surface of the first pipe joint, so that the corresponding end of the second pipe joint is sleeved and positioned along the radial direction; the pipe joint connecting structure also comprises a locking sheet which is clamped between the end surfaces of the first pipe joint and the second pipe joint; the socket pipe is provided with a connecting hole for fixing the locking piece on the outer side surface of the socket pipe through a fastener; the axial adjacent part of the locking piece and the first pipe joint and the axial adjacent part of the locking piece and the second pipe joint are provided with tenon-and-mortise structures; the mortise and tenon structure comprises a mortise and/or a tenon arranged on the locking sheet and a tenon and/or a mortise correspondingly arranged on the corresponding cylindrical pipe body; the mortise is of a closing-up structure, and the shape of the tenon is matched with the mortise to form positioning with the mortise along the axial direction of the cylindrical pipe body.

Has the advantages that: adopt above-mentioned technical scheme, can realize radial positioning through the socket joint pipe between first tube coupling and the second tube coupling to thereby can be connected with the lock plate simultaneously through tenon fourth of the twelve earthly branches structure and realize axial positioning, and the lock plate can be fixed to the lateral surface of socket joint pipe through the fastener on, guarantee whole tube coupling connection structure's stability, the connection of tube coupling has been realized from the outside, and the lock plate can form level and smooth surface with the outer peripheral face of first tube coupling and second tube coupling, satisfy corresponding user demand.

As a preferred technical scheme: the tenon is a dovetail structure, and the shape of the mortise is matched with the tenon and is also a dovetail structure.

Has the advantages that: the tenon and the mortise of the dovetail structure are of a conventional mortise and tenon structure, so that the dovetail structure is convenient to design and process.

As a preferred technical scheme: the outer peripheral surface of the tail end of the socket pipe is provided with an annular step, the annular step forms a sealing ring groove, and a pipe joint sealing ring is arranged in the sealing ring groove.

Has the advantages that: by adopting the technical scheme, the sealing performance of the joint of the pipe joints can be ensured, and the water stopping requirement is met.

As a preferred technical scheme: the outer peripheral surface of the pipe joint sealing ring is provided with an annular bulge, the cross section of the annular bulge is triangular, the side surface close to the first pipe joint is a vertical surface, and the side surface far away from the first pipe joint is an inclined surface.

Has the advantages that: adopt above-mentioned technical scheme to be convenient for the second tube coupling to establish to the cover on the socket pipe to can avoid water to the inside infiltration of tube coupling better.

As a preferred technical scheme: and reinforcing ribs are uniformly distributed on the inner wall of the socket pipe along the circumferential direction and extend along the axial direction of the socket pipe.

Has the advantages that: by adopting the technical scheme, the connection strength of the first pipe joint and the second pipe joint can be improved, and the requirement on the strength of the socket pipe can be reduced.

As a preferred technical scheme: the length direction both ends of strengthening rib are equipped with domaticly, domaticly make the height of the inner wall of strengthening rib protrusion socket pipe reduce to the corresponding end tip of strengthening rib gradually.

Has the advantages that: by adopting the technical scheme, the weight is favorably reduced, the material is saved, and the sharp part formed in the pipe is avoided.

As a preferred technical scheme: the plane where the groove side wall of each tenon groove is located is parallel to the radial direction of the corresponding position of the cylindrical pipe body, and the planes where the side surfaces on the two sides of each tenon in the width direction are parallel to the radial direction of the corresponding position of the cylindrical pipe body; the locking piece can generate elastic deformation when being fixed to the mortise or tenon on the pipe joint so as to be assembled in place with the mortise or tenon.

Has the advantages that: the groove side wall of the mortise is favorable for guaranteeing the connection strength and the stress uniformity of the mortise and tenon structure by adopting the arrangement mode.

As a preferred technical scheme: the planes of the groove side walls of the mortises corresponding to the same locking piece are parallel to each other, two side faces of the tenons corresponding to the same locking piece are parallel to each other, and the two side faces are parallel to the normal direction of the arc length midpoint of the locking piece.

Has the advantages that: adopt above-mentioned technical scheme to be convenient for the assembly of lock piece.

As a preferred technical scheme: the locking pieces are provided with N pieces, N is more than or equal to 3, and the locking pieces are sequentially connected end to form a complete ring.

Has the advantages that: by adopting the technical scheme, the tenon-and-mortise structure can be conveniently combined with the lock sheet and the lock sheet can be conveniently manufactured and installed.

As a preferred technical scheme: the head of the bolt for fixing the locking piece is provided with a bolt sealing ring, and the bolt sealing ring is used for being in sealing fit with the bottom surface of a counter bore through which the bolt penetrates on the locking piece.

Has the advantages that: by adopting the technical scheme, the sealing performance of the connecting part of the pipe joint can be better ensured.

Drawings

FIG. 1 is a partial schematic view of a pipe joint connecting portion of an embodiment 1 of a pipe joint connecting structure according to the present invention;

FIG. 2 is a longitudinal sectional view of FIG. 1;

FIG. 3 is a sectional view taken along line A-A of FIG. 2;

FIG. 4 is a sectional view taken along line B-B of FIG. 2;

FIG. 5 is a schematic view of the locking tab of FIG. 4 in a disassembled state;

FIG. 6 is a cross-sectional view taken along line C-C of FIG. 2;

FIG. 7 is a cross-sectional view taken along line D-D of FIG. 2;

FIG. 8 is a schematic view of a coupling process of pipe sections;

fig. 9 is a partial enlarged view at E in fig. 8.

The names of the components corresponding to the corresponding reference numerals in the drawings are: 11. a first pipe section; 12. a second pipe section; 13. mortises; 21. inserting a pipe; 22. reinforcing ribs; 23. a slope surface; 24. connecting holes; 25. an annular step; 26. a pipe joint sealing ring; 27. socket chamfering; 31. a locking piece; 32. a tenon; 33. a counter bore; 41. a bolt; 42. and (5) sealing a bolt.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the utility model, are intended for purposes of illustration only and are not intended to limit the scope of the utility model. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.

It is noted that relational terms such as "first" and "second," and the like, which may be present in the embodiments of the present invention, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, the statement that "comprises an … …" is intended to indicate that there are additional elements of the same process, method, article, or apparatus that comprise the element.

In the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" when they are used are to be construed broadly, e.g., as meaning a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; either directly or indirectly through intervening media, or may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art from specific situations.

In the description of the present invention, unless otherwise specifically stated or limited, the term "provided" may be used in a broad sense, for example, the object of "provided" may be a part of the body, or may be arranged separately from the body and connected to the body, and the connection may be detachable or non-detachable. The specific meaning of the above terms in the present invention can be understood by those skilled in the art from specific situations.

The present invention will be described in further detail with reference to examples.

Example 1 of the pipe joint connection structure of the present invention:

as shown in fig. 1 and 2, the pipe joint connecting structure is used for pipe curtain construction in the tunnel construction process, and specifically is a pipe joint connecting structure of a jacking pipe. The connecting portion of the two pipe joints connected to each other is shown in the drawings, and for the sake of clearly explaining the technical solution of the present invention, the two pipe joints in fig. 1 and 2 are hereinafter referred to as a first pipe joint 11 and a second pipe joint 12, respectively. A socket pipe 21 is arranged at one end of the first pipe joint 11 close to the second pipe joint 12, so that the corresponding end of the first pipe joint 11 forms a male joint; one end of the second pipe joint 12 close to the first pipe joint 11 can be sleeved on the socket pipe 21 and form radial positioning, so that the corresponding end of the second pipe joint 12 forms a female joint. As shown in fig. 8 and 9, to facilitate the insertion of the second pipe section 12, the end of the female pipe 21 is provided with a female chamfer 27. A locking piece 31 is arranged between the first pipe joint 11 and the second pipe joint 12, and is used for realizing the fixed connection of the first pipe joint 11 and the second pipe joint 12.

Specifically, as shown in fig. 2, 3 and 8, the socket pipe 21 is an independent component and is welded and fixed on the inner wall of the first pipe joint 11, and the welding seam is located at the inner end of the socket pipe 21 and is an annular welding seam, which can play a role in sealing. The wall thickness of the socket pipe 21 is greater than that of the first pipe joint 11, and the stress requirement between the first pipe joint 11 and the second pipe joint 12 can be met. As shown in fig. 7, 8 and 9, an annular step 25 is arranged on the outer peripheral surface of the outer end of the socket pipe 21, the annular step 25 forms a seal ring groove, a pipe joint seal ring 26 is arranged in the seal ring groove, the cross section of the seal ring is in the shape shown in fig. 9, an annular bulge is arranged on the outer peripheral surface, the cross section of the annular bulge is triangular, the left side surface is a vertical surface, the right side surface is an inclined surface and faces to the upper right, so that the socket joint of the second pipe joint 12 is facilitated, and the sealing performance is also improved. The corresponding end of the second pipe joint 12 is sleeved on the socket pipe 21, and when the radial positioning is realized, the inner wall of the second pipe joint 12 forms a sealing fit with the socket pipe 21 through a pipe joint sealing ring 26, so that the sealing and water stopping between the pipe joints are realized.

In order to improve the structural strength of the socket pipe 21, reinforcing ribs 22 are uniformly distributed on the inner wall of the socket pipe 21 along the circumferential direction, the reinforcing ribs 22 extend along the axial direction of the socket pipe 21, two ends of the reinforcing ribs 22 in the length direction are provided with slope surfaces 23, and the slope surfaces 23 enable the height of the reinforcing ribs 22 protruding out of the inner wall of the socket pipe 21 to be gradually reduced towards the end parts of the corresponding ends of the reinforcing ribs 22.

As shown in fig. 1, 2, and 6, the end faces of the first pipe joint 11 and the second pipe joint 12 close to one end of the locking piece 31 are both provided with a mortise 13, the mortise 13 is of a dovetail structure to form a closing structure, and the tenon 32 on the locking piece 31 is embedded in the radial direction of the tubular pipe body and is positioned in the axial direction of the tubular pipe body. The plane where the groove side wall of each mortise 13 on the pipe joint is positioned is parallel to the radial direction of the corresponding position of the cylindrical pipe body; the plane of the lateral surface of each tenon 32 in the width direction on the locking piece 31 is parallel to the radial direction of the corresponding position of the cylindrical pipe body. The end of the first pipe joint 11 facing away from the second pipe joint 12 has the same structure as the end of the second pipe joint 12 in fig. 1, and the end of the second pipe joint 12 facing away from the first pipe joint 11 has the same structure as the end of the first pipe joint 11 in fig. 1.

The locking pieces 31 are provided with three locking pieces, as shown in fig. 1 and 5, each locking piece 31 is an arc-shaped piece, the central angles corresponding to the three arc-shaped pieces are all 120 degrees, and the locking pieces 31 are sequentially connected end to form a complete ring. The socket pipe 21 is provided with a connecting hole 24, the connecting hole 24 is a threaded hole, two ends of each locking piece 31 in the length direction are respectively provided with a counter bore 33, and the locking pieces 31 are fixed on the outer sides of the locking pieces 31 through bolts 41. As shown in fig. 4 and 5, the head of the bolt 41 for fixing the locking plate 31 is provided with a bolt sealing ring 42, and the bolt sealing ring 42 is located on the inner end surface of the head and is used for sealing and matching with the bottom surface of the counterbore 33 on the locking plate 31 for the bolt 41 to pass through.

During assembly, as shown in fig. 9, a pipe joint sealing ring 26 is arranged on a sealing ring groove formed by the annular step 25 of the socket pipe 21, the left end of the second pipe joint 12 is sleeved on the socket pipe 21 at the right end of the first pipe joint 11 leftwards, a space is left between the right end surface of the first pipe joint 11 and the left end surface of the second pipe joint 12, and the space is equal to the width of the locking piece 31. Then, the locking piece 31 is fastened to the outer peripheral surface of the socket pipe 21 in the radial direction of the pipe joint, and since the plane where the groove side wall of each tongue-and-groove 13 is located is parallel to the radial direction of the corresponding position of the tubular pipe body, and the locking piece 31 is arc-shaped, the tenon 32 on the locking piece 31 cannot be directly inserted into the tongue-and-groove 13 when moving in the radial direction of the pipe joint. In order to satisfy the installation demand, the tongue-and-groove 13 of lock piece 31 on fixing to the tube coupling can produce elastic deformation to can produce under the exogenic action of modes such as hammering and warp, and then put in place with tongue-and-groove 13 or tenon 32 assembly, form the tenon fourth of the twelve earthly branches structure of complete adaptation. After the locking piece 31 is installed, the bolt 41 penetrates through the counter bore 33 in the locking piece 31 and is screwed into the connecting hole 24 in the socket pipe 21, at the moment, the first pipe joint 11 and the second pipe joint 12 can realize axial positioning and fixing through the locking piece 31 and the mortise and tenon structure and realize radial positioning through the socket pipe 21, reliable fixing of the first pipe joint 11 and the second pipe joint 12 is completed, and the outer surface of the butted pipe joint can be ensured to be smooth. Of course, the more the number of the locking pieces 31 is, the more convenient the assembly of the mortise and tenon structure is, but the more the number of the locking pieces 31 is required to be installed, and the number of the locking pieces 31 can be determined according to actual conditions.

Embodiment 2 of the pipe joint connection structure of the present invention:

the difference between the embodiment and the embodiment 1 is that in the embodiment 1, the locking piece 31 is provided with the tenon 32, and the pipe joint is provided with the mortise 13, which is beneficial to reducing the width and weight of the locking piece 31, shortening the axial dimension of the socket pipe 21 and improving the stress of the socket pipe 21; in this embodiment, the pipe joint is provided with a mortise 13, and the locking piece 31 is provided with a tenon 32. In other embodiments, the pipe joint and the locking piece 31 may be provided with both the mortise 13 and the tenon 32.

Example 3 of the pipe joint connection structure of the present invention:

the difference between the present embodiment and embodiment 1 is that in embodiment 1, the mortise 13 and the tenon 32 are both dovetail-shaped structures, and in the present embodiment, the shape of the mortise 13 is circular, and the shape of the tenon 32 is matched with the mortise 13 and is also circular. Of course, the tenon 32 and the mortise 13 can be replaced by other shapes, and the purpose of the present invention can be achieved by only setting the mortise 13 to be the closing structure and enabling the tenon 32 and the mortise 13 to be positioned along the axial direction of the cylindrical tube body.

Example 4 of the pipe joint connection structure of the present invention:

the difference between the embodiment and the embodiment 1 is that in the embodiment 1, the connection hole 24 on the socket pipe 21 is a threaded hole, the locking piece 31 is fixed on the outer side surface of the socket pipe 21 through a bolt 41, and the bolt 41 forms a fastening piece; in the present embodiment, the connecting hole 24 is a light hole, and the fastening member is a rivet.

Example 5 of the pipe joint connecting structure of the present invention:

the difference between this embodiment and embodiment 1 is that in embodiment 1, the socket pipe 21 is welded and fixed on the first pipe joint 11, and in this embodiment, the socket pipe 21 and the first pipe joint 11 are an integral structure.

Example 6 of the pipe joint connection structure of the present invention:

the difference between the present embodiment and embodiment 1 is that, in embodiment 1, the number of the locking pieces 31 is three, and in this embodiment, the number of the locking pieces 31 is two, and both the locking pieces 31 are semicircular pieces, the planes on which the groove side walls of the mortises 13 corresponding to the same locking piece 31 are located are parallel to each other, and the two side surfaces of the tenons 32 corresponding to the same locking piece 31 are parallel to each other and are parallel to the normal direction of the arc length midpoint of the locking piece 31, and there is no need to elastically deform the locking pieces 31 during installation. When the number of the locking pieces 31 is three or more, the planes of the groove side walls of the respective mortises 13 corresponding to the same locking piece 31 can be made parallel to each other, and the locking pieces 31 do not need to be elastically deformed during installation.

The above description is only a preferred embodiment of the present invention, and not intended to limit the present invention, the scope of the present invention is defined by the appended claims, and all structural changes that can be made by using the contents of the description and the drawings of the present invention are intended to be embraced therein.

Claims

1. The pipe joint connecting structure comprises a first pipe joint (11) and a second pipe joint (12), wherein each pipe joint comprises a cylindrical pipe body; the pipe joint is characterized in that a socket pipe (21) is arranged at one axial end of the first pipe joint (11), and the socket pipe (21) protrudes out of the end surface of the first pipe joint (11) so that the corresponding end of the second pipe joint (12) can be sleeved and positioned in the radial direction; the pipe joint connecting structure further comprises a locking piece (31) which is clamped between the end surfaces of the first pipe joint (11) and the second pipe joint (12), a connecting hole (24) is formed in the socket pipe (21), and the locking piece (31) is fixed on the outer side surface of the socket pipe (21) through a fastening piece; the axial adjacent part of the locking piece (31) and the first pipe joint (11) and the axial adjacent part of the locking piece (31) and the second pipe joint (12) are provided with tenon-and-mortise structures; the mortise and tenon structure comprises a mortise (13) and/or a tenon (32) arranged on the locking sheet (31), and the tenon (32) and/or the mortise (13) correspondingly arranged on the corresponding cylindrical pipe body; the mortise (13) is of a closing-up structure, and the shape of the tenon (32) is matched with the mortise (13) to form positioning with the mortise (13) along the axial direction of the cylindrical pipe body.

2. The pipe joint connection according to claim 1, wherein the tenon (32) is a dovetail structure, and the mortise (13) is shaped to fit the tenon (32) and is also a dovetail structure.

3. The pipe joint connecting structure according to claim 1 or 2, wherein an annular step (25) is provided on the outer peripheral surface of the distal end of the socket pipe (21), the annular step (25) forming a seal ring groove, and a pipe joint seal ring (26) is provided in the seal ring groove.

4. A pipe joint connecting structure according to claim 3, wherein the outer peripheral surface of the pipe joint sealing ring (26) is provided with an annular protrusion, the cross section of the annular protrusion is triangular, the side surface close to the first pipe joint (11) is a vertical surface, and the side surface far away from the first pipe joint (11) is an inclined surface.

5. The pipe joint connecting structure according to claim 1 or 2, wherein the inner wall of the socket pipe (21) is uniformly provided with reinforcing ribs (22) along the circumferential direction, and the reinforcing ribs (22) extend along the axial direction of the socket pipe (21).

6. The pipe joint connecting structure according to claim 5, wherein both ends of the reinforcing rib (22) in the length direction are provided with slope surfaces (23), and the slope surfaces (23) enable the height of the reinforcing rib (22) protruding out of the inner wall of the socket pipe (21) to be gradually reduced towards the tail ends of the corresponding ends of the reinforcing rib (22).

7. The pipe joint connecting structure according to claim 1 or 2, wherein the plane on which the groove side wall of each tenon groove (13) is located is parallel to the radial direction of the corresponding position of the cylindrical pipe body, and the plane on which the side faces on both sides in the width direction of each tenon (32) are located is parallel to the radial direction of the corresponding position of the cylindrical pipe body; the locking piece (31) can be elastically deformed when being fixed to a mortise (13) or a tenon (32) on the pipe joint so as to be assembled with the mortise (13) or the tenon (32) in place.

8. The pipe joint connecting structure according to claim 1 or 2, wherein the planes in which the groove side walls of the respective mortises (13) corresponding to the same locking piece (31) are located are parallel to each other, and both side surfaces of the respective tenons (32) corresponding to the same locking piece (31) are parallel to each other and are parallel to the normal direction of the midpoint of the arc length of the locking piece (31).

9. The pipe joint connecting structure according to claim 1 or 2, wherein the locking pieces (31) are provided with N pieces, N is more than or equal to 3, and the locking pieces (31) are connected end to end in sequence to form a complete circular ring.

10. A pipe joint connecting structure according to claim 1 or 2, wherein a head of a bolt (41) for fixing the locking piece (31) is provided with a bolt seal ring (42), and the bolt seal ring (42) is adapted to be in sealing engagement with a bottom surface of a counterbore (33) of the locking piece (31) through which the bolt (41) passes.