Lining pipe glue injection joint with axial reinforcement

Abstract

According to the lining pipe glue injection joint with the axial reinforcement function, a glue injection inner tube body of a glue injection outer sleeve is necked down and locked outside a lining hose which is annularly sleeved on a joint core through glue injection, so that the end part of the lining pipe is fixed and sealed, and the joint can be repaired on the premise of ensuring good sealing performance of a lining repair pipeline joint; an axial connecting assembly is arranged outside the joint, and it can be ensured that after the joint is installed, the phenomenon that the end of the lining pipe is torn and damaged and the sealing and fixing effects are lost due to mutual dislocation of the joint core and the glue injection outer sleeve caused by axial movement generated by expansion caused by heat and contraction caused by cold of a pipeline between the joint core and the glue injection outer sleeve can be avoided; it is ensured that the internally-installed lining pipe is firmly fixed to the joint inner core, shearing dislocation in the axis direction is avoided, it is ensured that the pipeline joint is good in sealing performance, free of local hard collision and axial displacement, and stable and reliable in long-term use.

Description

Technical Field

[0001] The utility model relates to a connecting joint for pipeline repair, in particular to a glue injection joint for an inner liner pipe with axial reinforcement. Background Art

[0002] In urban construction, pipelines are generally laid underground or under bridges to reduce land occupation and reduce the risk of abnormal damage. Pipelines are in shallow underground for a long time, and will rust and become damaged after running in a dark and humid environment for a certain period of time. Because they are buried underground, excavation construction is difficult, time-consuming and expensive. At present, when repairing the pipeline, the repair method of adding a liner pipe requires the pipeline to be repaired to be cut off from the original main pipe, and then the liner hose is used to repair the local pipeline to be repaired. After the repair is completed, the original main pipe and the repaired pipeline are connected through a transition pipe. However, in the prior art, pipes with a diameter of less than 300mm usually use glue injection joints, and the glue injection inner tube body of the outer jacket is formed into a necking clamp on the inner liner pipe stuck in the outer jacket of the joint core by high-pressure glue injection to form a fixed and sealed. However, when the pipeline is used for a long time, it will expand and contract axially, which is easy to cause movement between the joint core and the outer jacket, shearing the inner liner pipe, and there are certain safety hazards.

[0003] It is in this context that the present patent application proposes a liner pipe glue injection joint with axial reinforcement. Utility Model Content

[0004] The main purpose of the utility model is to overcome the above-mentioned shortcomings of the prior art and provide a liner pipe glue injection joint with axial reinforcement.

[0005] The utility model is realized by the following technical solutions:

[0006] A glue-injected joint for an inner liner pipe with axial reinforcement, characterized in that: the structure includes a joint core, a glue-injected jacket, a sealing ring, an inner liner hose, an original pipe section, and an axial connection component, the joint core includes a core body, the core body is designed as a thick-walled tube structure, and an axial connection ear plate 1, a tooth-shaped groove, a liner hose groove, and a sealing ring installation groove are sequentially arranged on the outer wall of the core body; the outer side of the glue-injected jacket is designed with an external fixing sleeve, an axial connection ear plate 2, a fastening screw, and a glue-injected connector, and the interior is a sleeve-type structure with an annular cavity, and a glue-injected inner tube body is arranged on the inner wall of the sleeve, wherein the glue-injected inner tube body of the glue-injected jacket is necked and locked to the outside of the inner liner hose on the joint core by glue injection, forming a fixation and seal; in order to prevent the joint core and the glue-injected jacket from axially moving, an axial connection component composed of bolts and nuts is arranged on the outside to ensure that the inner liner hose is not torn due to mutual movement between the joint core and the glue-injected jacket due to thermal expansion and contraction.

[0007] Preferably, the front end of the connector core is inserted into one end of the lining hose until the tooth-shaped groove completely enters the end, and an axial connecting ear plate 1 is provided on the outside, which is connected to the axial connecting ear plate 2 of the injection sleeve through an axial connecting component to form a fixation.

[0008] Preferably, a connection port for connecting to the original pipe section is provided at the end of the core body.

[0009] Further described, the end of the core body can be welded to the flange.

[0010] Preferably, multiple axial connecting ear plates are welded, and the ear plate thickness, connection size and quantity are different according to different axial forces to meet the installation and force requirements of the axial connecting components. If the force is large, necessary supporting reinforcing ribs can be added.

[0011] Preferably, the tooth-shaped groove designed at the front end of the core body is in an inverted wedge shape, with 4 to 6 rings. In order to meet the needs of connecting and fixing the liner hose, it can be designed with more rings.

[0012] Preferably, the tooth-shaped slots are adjacent to each other and are integrally recessed into a rubber lining groove with a certain width, the recessed depth is greater than the wall thickness of the lining hose, and the width is 1 / 2 of the diameter of the lining hose. In special cases, the grooves can be lengthened or shortened according to design characteristics.

[0013] Preferably, in order to meet the sealing ring clamping installation requirements, a sealing ring installation groove is designed at the front end of the rubber lining groove, and the sealing ring is provided with 2 circles.

[0014] Preferably, the connecting end between the core body and the lining hose is designed with a chamfer or end rounded corner.

[0015] Beneficial effects of the utility model: Due to the adoption of the above technical solution,

[0016] A glue-injected joint for an axially reinforced liner pipe, in which the glue-injected inner tube body of the glue-injected outer sleeve is necked and locked on the outside of the liner hose installed on the joint core by glue injection, thereby fixing and sealing the end of the liner pipe. On the premise of ensuring good sealing at the interface of the liner repair pipe, the outside of the joint has an axial connection component, which can ensure that after the joint is installed, the axial movement between the joint core and the glue-injected outer sleeve due to the thermal expansion and contraction of the pipeline will not cause the joint core and the glue-injected outer sleeve to shift relative to each other, causing tearing and damage to the end of the liner pipe, and losing the sealing and fixing effect. Ensure that the inner liner pipe installed inside is firmly fixed on the inner core of the joint, and there will be no shear displacement in the axial direction, ensuring good sealing of the pipeline joint, without local hard bumps and axial displacement, and stable and reliable for long-term use.

[0017] The utility model is further described below in conjunction with the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall installation of a preferred embodiment of the utility model;

[0019] Figure 2 It is a schematic diagram of the structure of a preferred embodiment of the utility model;

[0020] Figure 3 It is a schematic diagram of the connection and sealing structure of the preferred embodiment of the utility model;

[0021] Figure 4 This is a schematic diagram of the structure of the connector core of the preferred embodiment of the utility model;

[0022] Figure 5 This is a schematic diagram of the structure of the glue injection jacket of the preferred embodiment of the utility model;

[0023] Wherein: 1. Joint core; 1.1. Core body; 1.2. Axial connection ear plate; 1.3. Tooth-shaped slot; 1.4. Rubber lining slot; 1.5. Sealing ring installation slot; 2. Glue injection sleeve; 2.1. External fixing sleeve; 2.2. Axial connection ear plate; 2.3. Glue injection inner tube body; 2.4. Fastening screw; 2.5. Glue injection connector; 3. Sealing ring; 4. Lining hose; 5. Original pipe section; 6. Axial connection assembly. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] like Figure 1 , 2, 3, 4, 5, a liner pipe glue injection joint with axial reinforcement, the structure includes a joint core 1, a glue injection sleeve 2, a sealing ring 3, a liner hose 4, an original pipe section 5, and an axial connection component 6. The joint core 1 includes a core body 1.1, and the core body 1.1 is designed as a thick-walled tube structure. The outer wall of the core body 1.1 is sequentially provided with an axial connection ear plate 1.2, a tooth-shaped groove 1.3, a lining groove 1.4, and a sealing ring installation groove 1.5; the outside of the glue injection sleeve 2 is designed with an external fixing sleeve 2.1, an axial connection ear plate 2. .2, fastening screws 2.4, glue injection connector 2.5, the interior of which is a sleeve-type structure with an annular cavity, and a glue injection inner tube body 2.3 is provided on the inner wall of the sleeve, wherein the glue injection inner tube body 2.3 of the glue injection sleeve 2 is necked and locked on the outside of the lining hose 4 on the joint core 1 by glue injection, forming a fixation and seal; in order to prevent the joint core 1 and the glue injection sleeve 2 from axial movement, an axial connection assembly 6 composed of bolts and nuts is provided on the outside to ensure that the lining hose 4 is not torn due to the mutual movement of the joint core 1 and the glue injection sleeve 2 due to thermal expansion and contraction.

[0026] During the specific implementation process, the front end of the connector core 1 is inserted into one end of the lining hose 4 until the tooth-shaped groove 1.3 completely enters the end, and the external axial connecting ear plate 1.2 is connected to the axial connecting ear plate 2.2 of the injection sleeve 2 through the axial connecting component 6 to form a fixed connection.

[0027] During the specific implementation process, the connection end between the core body 1.1 and the lining hose 4 is set to be chamfered or end-rounded; a connection port connected to the original pipe section 5 is set at the end of the core body 1.1.

[0028] Furthermore, the end of the core body 1.1 can be welded to a flange.

[0029] During the specific implementation process, multiple axial connecting ear plates 1.2 are welded. The ear plate thickness, connection size and quantity are different according to the axial force to meet the installation and force requirements of the axial connecting component 6. If the force is large, necessary supporting reinforcing ribs can be added.

[0030] During the specific implementation process, the tooth-shaped groove 1.3 designed at the front end of the core body 1.1 is an inverted wedge shape with 4 to 6 rings. In order to meet the needs of connecting and fixing the liner hose 4, it can be designed with more rings.

[0031] During the specific implementation process, the tooth-shaped groove 1.3 is adjacent to the integrally recessed rubber lining groove 1.4 with a certain width, the recessed depth is greater than the wall thickness of the lining hose 4, and the width is 1 / 2 of the diameter of the lining hose 4. In special cases, it can be lengthened or shortened according to design characteristics.

[0032] During the specific implementation, in order to meet the requirements for tightening the sealing ring 3, a sealing ring installation groove 1.5 is designed at the front end of the rubber lining groove 1.4, and the sealing ring is set to 2 circles.

[0033] During the specific implementation process, the outer fixed sleeve 2.1 is made of thick-walled seamless pipe or forged cylinder, and is processed into an internal step to meet the nested installation of the injection inner tube body 2.3. There is an opening on the outside in the center of the step. At the same time, there are several sinkers on the end face of the thick wall to meet the process of the inner lining hose 4. The handle is turned over and fixed on the outside of the outer fixed sleeve 2.1; multiple radial threaded holes are processed at the rear end to meet the installation of the fastening screws 2.4; a plurality of axial connecting ear plates 2.2 are welded to the outside of the circumference of the front part of the outer fixed sleeve 2.1. The thickness, connection size and number of the ear plates are different according to the different axial forces to meet the installation and force requirements of the axial connection component 6. If the force is large, necessary support reinforcing ribs can be added.

[0034] During the specific implementation process, the glue injection inner carcass 2.3 is an inner nest of a thin film, which is installed in the inner step of the outer fixing sleeve 2.1 by ring welding at both ends, so that there is a cavity inside, and the inner hole is consistent with the inner hole of the thick end of the outer fixing sleeve 2.1. Fastening screws 2.4 are installed at the rear end, and the number is consistent with the threaded holes of the outer fixing sleeve 2.1. According to the installation and fixing requirements and structural dimensions, different numbers and forms of screws can be selected to meet the needs of clamping the outer fixing sleeve 2.1 ring sleeve on the outside of the original pipe section 5; the glue injection connector 2.5 is connected to the external opening centered on the step of the outer fixing sleeve 2.1. The opening has a machined sealing thread or is connected to the glue injection connector 2.5 by welding, and the circumference is generally arranged with one set each on the upper and lower sides. The glue injection connector 2.5 is a joint with an inner hole made of round steel. The inner thread is consistent with the joint of the glue injection equipment, and there is a matching plug, which is installed and sealed after the glue injection is completed.

[0035] In the specific implementation process, the sealing ring 3 is made of a rubber material that meets the service life and is suitable for the medium conveyed by the original pipe section 5. The cross section is circular, and the inner diameter is smaller than the sealing ring 1.5 installation groove of the joint core 1, so that the hoop is tightly installed in the sealing ring 1.5 installation groove and will not fall out of the groove when the joint core 1 is inserted and installed. According to different requirements, different numbers of sealing rings with different cross sections can be installed to meet the needs of joint use.

[0036] In the specific implementation process, the axial connection assembly 6 is a high-strength bolt assembly with an anti-corrosion coating, which can be an internal hexagon or external hexagon form, and adopts a bolt and nut combination or a double-headed stud form. By connecting the axial connection ear plate 1.2 with the axial connection ear plate 2.2 with the same coaxial hole, the joint will not be disengaged when it expands and contracts, and the position of the joint core 1 and the injection jacket 2 is stable, ensuring the safety and stability of the structure of the liner hose 4 installed in the annulus. According to the pressure requirements of the original pipe section 5, bolt combinations of different specifications, quantities, and forms can be selected to meet the use requirements, and the fixing capacity exceeds the maximum axial stress.

[0037] In the specific implementation process, the main steps for the specific implementation of a liner pipe glue injection joint with axial reinforcement are as follows:

[0038] Step 1: Determine the size and thickness of the lining hose 4 according to the specifications of the original pipe section 5, the composition characteristics of the medium passing through, and the pressure and temperature requirements, select suitable materials for manufacturing, conduct a comprehensive design analysis of the joint, select suitable materials for manufacturing, complete the component processing of the joint core 1 and the injection sleeve 2 according to the diagram, purchase the sealing ring 3 and the screw nut of the axial connection component 6, complete the joint manufacturing and transport it to the construction site.

[0039] Step 2: Cut the original pipe section 5, make sure the end is flush and clean the burrs, put the injection sleeve 2 into the end, and manually tighten the fastening screw 2.4 so that the injection sleeve 2 basically clamps the original pipe section end 5, and the injection connector 2.5 has one at the highest point and the lowest point. Then, the lining hose 2 is inserted according to the construction and repair requirements. The lining hose 2 after insertion needs to be marked according to the fit of the external fixing sleeve 2.1 and 10 to 15 mm longer. In order to install and fix the lining hose 2 so that it will not move when the joint core 1 is inserted and installed, it is necessary to cut several long strips of fixed handles in the circumferential direction on the lining hose 4 outside the cutting line of the lining hose 2. The handle is flipped and fitted to the outside of the external fixing sleeve 2.1 through iron wire or binding tape, and is stuck with the end sink groove of the external fixing sleeve 2.1 to ensure stable fixation and no protrusion of the end.

[0040] Step 3: Insert the joint core 1 into the end 2 of the injection jacket with the lining hose 4 fixed, and try to control the concentric alignment of the two. Adjust the axial connection ear plate 1.2 and the axial connection ear plate 2.2 to be basically aligned, and then follow the long bolts between the two ear plate holes, and tighten the circumferential multiple bolts evenly to continuously insert the joint core 1 into the lining hose 4 fixed at the end of the injection jacket 2. At this time, the sealing ring 3 is squeezed to form a preliminary seal.

[0041] Step 4: After the joint core 1 is inserted to the designed depth, connect the injection equipment and the injection connector 2.5 to inject the injection jacket 2, and inject the curable colloid according to the design requirements. The injection pressure of the injection inner carcass 2.3 produces necking deformation, which is continuously pressurized and deformed to increase and tighten on the outside of the lining hose 4. The joint core 1 is installed inside to shrink the neck so that the injection inner carcass 2.3 squeezes the lining hose 4 close to the tooth-shaped card slot 1.3 and the lining rubber slot 1.4 to form a stable fixation and seal. After reaching the required pressure, keep it for a certain time to wait for the colloid to solidify, then remove the equipment and install a plug on the outside of the injection connector 2.5 to prevent rain or dust from entering.

[0042] Step 5: Tighten the fastening screws 2.4 to the required torque, so that the injection sleeve 2 is firmly fixed to the original pipe section 5. Then cut off the handle of the circumferential lining hose 4 protruding from the outer fixing sleeve 2.1, correct the end of the lining hose 4, and complete the installation of the lining pipe joint. The remaining tie-back operations are carried out according to the overall construction process to complete the trenchless lining pipe repair of the pipeline.

[0043] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A liner pipe glue injection joint with axial reinforcement, characterized in that: The structure includes a joint core, a glue injection sleeve, a sealing ring, a lining hose, an original pipe section, and an axial connection component. The joint core includes a core body, and the core body is designed as a thick-walled tubular structure. The outer wall of the core body is sequentially provided with an axial connection ear plate 1, a tooth-shaped groove, a lining hose groove, and a sealing ring installation groove; the outside of the glue injection sleeve is designed with an external fixing sleeve, an axial connection ear plate 2, a fastening screw, and a glue injection connector, and the inside is a sleeve-type structure with an annular cavity, and a glue injection inner tube body is provided on the inner wall of the sleeve, wherein the glue injection inner tube body of the glue injection sleeve is necked and locked to the outside of the lining hose on the joint core by glue injection, forming a fixation and seal; in order to prevent the joint core and the glue injection sleeve from axial movement, an axial connection component composed of bolts and nuts is provided on the outside to ensure that the lining hose is not torn due to the mutual movement of the joint core and the glue injection sleeve due to thermal expansion and contraction.

2. The liner pipe glue injection joint with axial reinforcement according to claim 1, characterized in that: The front end of the connector core is inserted into one end of the lining hose until the tooth-shaped groove completely enters the end, and an axial connecting ear plate 1 is provided on the outside to be connected and fixed with the axial connecting ear plate 2 of the injection sleeve through an axial connecting component.

3. The liner pipe glue injection joint with axial reinforcement according to claim 1, characterized in that: A connection port connected to the original pipe section is arranged at the end of the core body.

4. The liner pipe glue injection joint with axial reinforcement according to claim 1, characterized in that: The end of the core body can be welded to the flange.

5. The liner pipe glue injection joint with axial reinforcement according to claim 1, characterized in that: Multiple axial connection ear plates are welded together. The ear plate thickness, connection size and quantity are different according to the axial force to meet the installation and force requirements of the axial connection components. If the force is large, necessary support reinforcement plates can be added.

6. The liner pipe glue injection joint with axial reinforcement according to claim 1, characterized in that: The tooth-shaped groove designed at the front end of the core body is in an inverted wedge shape.

7. The liner pipe glue injection joint with axial reinforcement according to claim 6, characterized in that: The tooth-shaped slots are adjacent to each other and are integrally recessed into a rubber lining groove with a certain width, the recessed depth is greater than the wall thickness of the lining hose, and the width is 1 / 2 of the diameter of the lining hose.

8. The liner pipe glue injection joint with axial reinforcement according to claim 7, characterized in that: In order to meet the requirements of sealing ring clamping installation, a sealing ring installation groove is designed at the front end of the rubber lining groove, and the sealing ring is set to 2 circles.

9. The liner pipe glue injection joint with axial reinforcement according to claim 1, characterized in that: The connecting end of the core body and the lining hose is arranged to be chamfered or rounded.

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