CN-122014936-A - Self-anchored interface nodular cast iron pipe and connecting method

CN122014936ACN 122014936 ACN122014936 ACN 122014936ACN-122014936-A

Abstract

The invention provides a self-anchored joint nodular cast iron pipe and a connecting method, which belong to the technical field of pipeline connection and comprise a pipe fitting main body socket and a pipe fitting main body socket, one end of the pipe fitting main body socket can be inserted into one end of the pipe fitting main body socket, a plurality of stop blocks are arranged between the pipe fitting main body socket and are connected end to end, clamping grooves are formed in the stop blocks, fixing belts are embedded in the clamping grooves of the stop blocks, an installation gap is formed between the stop block positioned at the foremost end and the stop block positioned at the rearmost end, and a locking piece is inserted into the installation gap. The invention can bear axial tension without additional anchoring, and simultaneously ensures the sealing reliability.

Inventors

XING HUIXIN
WANG HAILING
SUN YUNYUE
ZHANG ZHIHUI
ZHU ZHONGJIN

Assignees

玫德集团(临沂)铸管有限公司

Dates

Publication Date: 20260512
Application Date: 20260318

Claims (10)

1. The utility model provides a self-anchored interface nodular cast iron pipe, its characterized in that, including pipe fitting main part bellmouth and pipe fitting main part socket, pipe fitting main part socket one end can insert inside pipe fitting main part bellmouth one end, be equipped with a plurality of stoppers between pipe fitting main part bellmouth and the pipe fitting main part socket, a plurality of stoppers end to end, be equipped with the draw-in groove on the stopper, a plurality of stopper draw-in grooves are embedded to be equipped with the fixed band, form the installation clearance between the stopper that is located the front end and the stopper that is located the rearmost, the installation clearance department is inserted and is equipped with the retaining member.
2. The self-anchored joint ductile iron pipe according to claim 1 wherein the outer circumferential surface of the pipe fitting body socket at one end inside the pipe fitting body socket is provided with a baffle ring, the baffle ring and the outer circumferential surface of the pipe fitting body socket are formed in one step by submerged arc welding, and the baffle ring is an annular protrusion protruding out of the outer circumferential surface of the pipe fitting body socket.
3. The self-anchored joint ductile iron pipe according to claim 1 wherein the stop block comprises an arc-shaped plate, a first conical block is arranged at one end of the upper surface of the arc-shaped plate, the length of the first conical block is smaller than that of the arc-shaped plate, second conical blocks are arranged at two sides of the first conical block, and the height and the width of the second conical block are smaller than those of the first conical block.
4. The self-anchored joint ductile iron pipe according to claim 3 wherein a stop is provided at one end of the upper surface of the arc plate far away from the first conical block, the length of the stop is the same as the length of the first conical block, a slot is further provided at the upper surface of the arc plate, and the slot is provided near one side of the stop.
5. A self-anchored joint ductile iron pipe according to claim 3 wherein the bottom surface of the arcuate plate has a retainer groove formed at one end thereof adjacent to the first tapered block, the depth of the retainer groove being in accordance with the height of the retainer, the retainer being insertable into the retainer groove.
6. The self-anchored joint ductile iron pipe according to claim 1 wherein the pipe fitting body socket is internally provided with a stopper mounting groove, the stopper mounting groove is correspondingly arranged with a plurality of stoppers, the stopper mounting groove comprises an arc-shaped section and a conical section, the arc-shaped section corresponds to a clamping groove on the stopper, the conical section is matched with a first conical block on the stopper, a set distance is arranged between the top surface of the first conical block and the inner wall of the conical section, and the inner wall of the conical section and the top surface of the first conical block are both arc-shaped.
7. The self-anchored joint ductile iron pipe according to claim 1 wherein the locking member has an arcuate plate structure comprising a locking section, a connecting section and a limiting section, wherein the locking section has a U-shape, the distance between the two ends of the open side of the locking section is greater than the width of the installation gap, the two ends of the open side of the locking section are respectively located above the arcuate plates of the stop blocks on the two sides of the installation gap, and the end of the locking section away from the open side is located between the arcuate sections of the stop block clamping groove and the stop block installation groove.
8. The self-anchored joint ductile iron pipe according to claim 7 wherein the connecting section is positioned at the end of the locking section remote from the open side, the connecting section having a width greater than the width of the installation gap and less than the distance between the stop blocks on both sides of the installation gap.
9. The self-anchored joint ductile iron pipe according to claim 7 wherein the limiting section is positioned at one end of the connecting section far away from the locking section, the limiting section is parallel to the stop block, the length of the limiting section is greater than the distance between the stop blocks at two sides of the installation gap, and two ends of the limiting section are closely arranged at the stop blocks at two sides of the installation gap.
10. A method of connecting self-anchored joint ductile iron pipes using a self-anchored joint ductile iron pipe according to any one of claims 1 to 9, comprising the steps of: a sealing rubber ring is placed in a rubber ring groove on the inner surface of the socket of the pipe fitting main body; Inserting the pipe fitting main body socket into the pipe fitting main body socket and butting the pipe fitting main body socket into place so that the sealing rubber ring is in contact with the outer circular surface of the pipe fitting main body socket; Sequentially installing a plurality of stop blocks between the pipe fitting main body bell mouth and the pipe fitting main body spigot through notches on the pipe fitting main body bell mouth end face, enabling the stop rings to be embedded into stop ring clamping grooves of the stop blocks, and enabling the bottom surfaces of the stop blocks to be attached to the outer circular surface of the pipe fitting main body spigot; Embedding a fixing belt into an annular clamping groove formed by the plurality of stop block clamping grooves to bind the plurality of stop blocks; the locking piece is inserted into the installation clearance of the stop block to press the stop block.

Description

Self-anchored interface nodular cast iron pipe and connecting method Technical Field The invention belongs to the technical field of pipeline connection, and particularly relates to a self-anchored interface nodular cast iron pipe and a connection method. Background The construction of the drag pipe is used as one of core technologies of non-excavation pipeline laying, and is widely applied to complex scenes such as crossing roads, rivers, building groups and the like, the pipe is required to bear axial tension, soil friction and uneven settlement stress in the traction process, and interface performance becomes a key for determining engineering quality. The conventional mechanical interface or flange interface of the ductile cast iron pipe has obvious adaptation defects that the mechanical interface is fastened by bolts and is easy to loosen under the action of long-term axial tension, so that the sealing is invalid, the flange interface has large weight and complex assembly, the drag resistance is increased, and the joint is easy to break due to stress concentration. In addition, the traditional connector is additionally provided with an anchor for fixing the pipe, so that the construction period is prolonged, and the engineering cost is also increased. Disclosure of Invention Aiming at the defects or shortcomings in the prior art, the invention provides the self-anchored interface nodular cast iron pipe and the connecting method, which can bear axial tension without additional anchoring and ensure sealing reliability. In order to achieve the above purpose, the invention adopts the following technical scheme: in a first aspect, an embodiment of the present invention provides a self-anchored joint ductile cast iron pipe, including a pipe main body socket and a pipe main body socket, one end of the pipe main body socket may be inserted into one end of the pipe main body socket, a plurality of stop blocks are disposed between the pipe main body socket and the pipe main body socket, the stop blocks are connected end to end, a clamping groove is disposed on the stop block, a fixing band is embedded in the clamping groove of the stop block, a mounting gap is formed between the stop block located at the foremost end and the stop block located at the rearmost end, and a locking member is inserted in the mounting gap. Further, a baffle ring is arranged on the outer circular surface of one end of the pipe fitting body socket, which is positioned in the pipe fitting body socket, the baffle ring and the outer circular surface of the pipe fitting body socket are formed in one step through submerged arc welding, and the baffle ring is an annular bulge protruding out of the outer circular surface of the pipe fitting body socket. Further, the stop block comprises an arc-shaped plate, a first conical block is arranged at one end of the upper surface of the arc-shaped plate, the length of the first conical block is smaller than that of the arc-shaped plate, second conical blocks are arranged on two sides of the first conical block, and the height and the width of the second conical block are smaller than those of the first conical block. Further, one end of the upper surface of the arc-shaped plate, which is far away from the first conical block, is provided with a stop block, the length of the stop block is the same as that of the first conical block, the upper surface of the arc-shaped plate is also provided with a clamping groove, and the clamping groove is arranged close to one side of the stop block. Further, a baffle ring clamping groove is formed in one end, close to the first conical block, of the bottom surface of the arc-shaped plate, the depth of the baffle ring clamping groove is consistent with the height of the baffle ring, and the baffle ring can be embedded into the baffle ring clamping groove. Further, the stopper mounting groove has been seted up on the pipe fitting main part bellmouth inside, stopper mounting groove corresponds the setting with a plurality of stoppers, and the stopper mounting groove includes arc section and toper section, the arc section corresponds with the draw-in groove on the stopper, toper section and the first toper piece looks adaptation on the stopper, and interval setting distance between first toper piece top surface and the toper section inner wall, toper section inner wall and first toper piece top surface are the arc. Further, the retaining member is of an arc plate-shaped structure and comprises a locking section, a connecting section and a limiting section, the locking section is U-shaped, the distance between two ends of the opening side of the locking section is larger than the width of the installation gap, the two ends of the opening side of the locking section are respectively located above the arc plates of the stop blocks on two sides of the installation gap, and one end of the locking section, which is far away from the opening side, is located between the arc sec