1. A concrete bell and spigot pipe sealing device for sealing a bell and spigot gap of a bell and spigot concrete pipe, the sealing device comprising: the device comprises a steel hoop plate, a connecting plate, a fixing plate, a screw and a water stop belt;

the steel hoop plate comprises a left side arc steel hoop plate and a right side arc steel hoop plate, the left side arc steel hoop plate and the right side arc steel hoop plate are both semicircular in shape, the left side arc steel hoop plate and the right side arc steel hoop plate are symmetrically arranged from left to right, the left side arc steel hoop plate and the right side arc steel hoop plate are arranged along the bell and spigot gap, a groove-shaped first clamping hook is arranged at the bottom end of the left side arc steel hoop plate, the top end of the left side arc steel hoop plate is fixed at the top of the inner wall of the spigot concrete pipe, a second clamping hook which is reversely arranged with the first clamping hook is arranged at the bottom end of the right side arc steel hoop plate, the top end of the right side arc steel hoop plate is fixed at the top of the inner wall of the spigot concrete pipe, and the left side arc steel hoop plate and the right side arc steel hoop plate are buckled to form an annular pipe hoop matched with the inner wall of the;

the connecting plate comprises a left connecting plate and a right connecting plate, the left connecting plate and the right connecting plate are fixedly connected with one end of the left arc-shaped steel hoop plate and one end of the right arc-shaped steel hoop plate respectively in a welding mode, and the surfaces of the left connecting plate and the right connecting plate are respectively provided with a first screw hole;

the fixed plate is arranged at the tops of the first clamping hook and the second clamping hook, and two ends of the fixed plate are respectively buckled and fixed with the notches of the first clamping hook and the second clamping hook;

the screw rod sequentially penetrates through the first screw holes in the surfaces of the left connecting plate and the right connecting plate to integrally connect the left arc-shaped steel hoop plate and the right arc-shaped steel hoop plate;

the waterstop set up in spigot concrete pipe inner wall surface uses inside pipe wall top as the starting point, the fringe form the waterstop is pasted to spigot joint gap circumference in spigot concrete pipe inner wall surface.

2. The concrete socket pipe sealing device as claimed in claim 1, wherein the vertical side surfaces of said first hook and said second hook are respectively provided with a second screw hole, and said screw rod sequentially passes through said second screw holes to connect and fix said first hook and said second hook into a whole.

3. The concrete bell and spigot seal of claim 1, wherein said seal further comprises: a baffle plate;

the separation blade is located the left side arc steel hoop board with between the right side arc steel hoop board, longitudinal section is the ascending trough-shaped of opening, two sides of separation blade are provided with the round hole, the separation blade with the left side arc steel hoop board with the right side arc steel hoop board passes through the screw rod passes in proper order the second screw with the round hole is together fixed.

4. The concrete bell and spigot pipe sealing device of claim 1, wherein said steel hoop plate has a width greater than a width of said water stop, said water stop having a width greater than a width of said spigot gap.

5. The concrete bell and spigot pipe sealing device of claim 1 wherein said water stop is applied to a thickness of less than 5 mm.

6. The concrete bell and spigot seal of claim 1 wherein said steel band plate is corrugated in cross-section.

7. A method for sealing a concrete faucet pipe is characterized by comprising the following steps:

step 1, cleaning the surface of the joint of the socket type concrete pipe:

step 1.1, cleaning floating soil affecting the adhesion of a water stop and the inner wall of a pipe in the inner surface of a bell and spigot gap within a range of +/-20 cm by using a bamboo broom;

step 1.2, removing dirt and sludge on the inner surface of the bell and spigot joint in a range of +/-20 cm from the running rainwater and sewage pipeline;

step 2, adhering a water stop belt:

step 2.1, taking the top of the inner wall of the pipe as a starting point, and circumferentially sticking the water stop belt on the surface of the inner wall of the spigot concrete pipe along the strip-shaped bell and spigot gap;

step 2.2, according to the width of the bell and spigot gap, laying and compacting the middle part of the water stop belt with the width of 16cm and the thickness of 1cm in alignment with the central line of the bell and spigot gap;

step 3, mounting the steel hoop plate;

step 3.1, sequentially fixing the top ends of the left side arc-shaped steel hoop plate and the right side arc-shaped steel hoop plate to the top of the inner wall of the faucet concrete pipe, keeping the distance between the left side connecting plate and the right side connecting plate within 50-100 mm, and installing the blocking piece between the left side arc-shaped steel hoop plate and the right side arc-shaped steel hoop plate;

3.2, penetrating the screw through the first screw hole, the second screw hole and the round hole in sequence from top to bottom, and respectively adjusting nuts for fixation;

step 3.3, mounting a fixed plate, and ensuring that two ends of the fixed plate are respectively buckled and fixed with the notches of the first clamping hook and the second clamping hook;

step 3.4, ensuring that the steel hoop plate completely covers the bell and spigot gap, and adjusting and confirming that the steel hoop plate completely presses the water stop belt at any time in the process of installing the hoop plate;

step 4, adjusting the pressing force between the steel hoop plate and the inner wall of the socket concrete pipe:

step 4.1, after the steel hoop plate is installed, adjusting nuts penetrating through the first screw hole, the second screw hole and the round holes to enable the steel hoop plate to expand outwards, and enabling the left side arc-shaped steel hoop plate and the right side arc-shaped steel hoop plate to evenly and outwards press the water stop belt;

and 4.2, painting a waterproof coating layer on the surface of the steel hoop plate.

Background

Most of urban sewage pipelines are large-diameter pipelines, the soil is deeply covered, the pipelines are damaged along with long-term operation of the pipelines, and structural problems of staggered joints, disjointing and the like at pipeline joints are more and more prominent. If the water is not repaired in time, serious negative effects on the environment and the economic society are inevitably caused. Comprehensive excavation and repair are common repair means, but the method has the defects of low efficiency, high cost, large environmental pollution and the like, and the comprehensive excavation and repair can bring large pressure to urban traffic. Therefore, it is very important to adopt a maintenance method that is economical, efficient and easy to implement to quickly recover the safe operation of the pipeline.

Chinese patent publication No. CN107338852A discloses an anti-leakage installation device for a rainwater pipeline and an installation method thereof, the anti-leakage installation device includes: the first clamping piece is pressed on the outer side of the pipe orifice of the socket pipe at the first end of the rainwater pipeline; the second clamping piece is pressed on the outer side of the pipe orifice of the socket pipe at the second end of the rainwater pipeline; and the contraction inhaul cable penetrates through the multi-section socket pipe and is detachably connected between the first clamping piece and the second clamping piece. The patent solves the problem of poor tightness of the joints between the concrete pipes forming the rainwater pipeline in the conventional installation and laying method of the rainwater pipeline, but has the following defects: the repair operation requires a full excavation.

The Chinese patent of publication No. CN111963814A discloses a pipeline trenchless repairing method, which comprises the following steps: pulling a lining hose into a pipeline to be repaired, wherein the wall of the lining hose is provided with liquid thermosetting resin; plugging two ends of the lining hose; controlling the lining hose to be attached to the inner wall of the pipeline to be repaired; controlling the curing conditions of the lining hose in stages such that the thermosetting resin cures, at least one of the pressure within the lining hose and the temperature of the lining hose being different at different said stages; and opening two ends of the lining hose to obtain the repaired pipeline. This patent has realized the purpose of non-excavation repair pipeline, improves the problem of pipeline repair efficiency, nevertheless has following shortcoming: the construction process is complicated and the repair cost is too high.

Disclosure of Invention

The invention aims to provide a sealing device and a sealing method for a concrete bell and spigot pipe, aiming at the defects of the prior art.

A seal for a concrete bell and spigot pipe, said seal comprising: the device comprises a socket joint type concrete pipe, a steel hoop plate, a connecting plate, a fixing plate, a screw and a water stop belt;

the spigot-and-socket concrete pipe comprises a female end, a pipe body and a male end, wherein rubber cushion layers are respectively arranged on the inner surface of the female end and the outer surface of the male end, and the rubber cushion layers positioned at the matching part of the female end and the male end are mutually extruded and seal a gap outside the spigot-and-socket concrete pipe;

the steel hoop plate is arranged on the surface of a gap formed at the splicing part of the female end and the socket end, the steel hoop plate comprises a left side arc steel hoop plate and a right side arc steel hoop plate, the left side arc steel hoop plate and the right side arc steel hoop plate are both semicircular in shape, the left side arc-shaped steel hoop plate and the right side arc-shaped steel hoop plate are symmetrically arranged from left to right, the left side arc-shaped steel hoop plate and the right side arc-shaped steel hoop plate are arranged along the bell and spigot gap, the bottom end of the left arc-shaped steel hoop plate is provided with a groove-shaped first clamping hook, the top end of the left arc-shaped steel hoop plate is fixed at the top of the inner wall of the socket end pipe body, a second hook which is arranged in the reverse direction of the first hook is welded at the bottom end of the right arc-shaped steel hoop plate, the top end of the right arc-shaped steel hoop plate is fixed at the top of the inner wall of the socket pipe body, the left side arc-shaped steel hoop plate and the right side arc-shaped steel hoop plate are buckled to form an annular pipe hoop matched with the inner wall of the socket pipe body;

the connecting plate is arranged on the inner side of the top of the steel hoop plate and comprises a left connecting plate and a right connecting plate, the left connecting plate and the right connecting plate are fixedly connected with the top ends of the left arc-shaped steel hoop plate and the right arc-shaped steel hoop plate respectively in a welding mode, and first screw holes are formed in the surfaces of the left connecting plate and the right connecting plate respectively;

the fixed plate is arranged at the tops of the first clamping hook and the second clamping hook, and two ends of the fixed plate are respectively buckled and fixed with the notches of the first clamping hook and the second clamping hook;

the screw rod sequentially penetrates through the first screw holes in the surfaces of the left connecting plate and the right connecting plate to integrally connect the left arc-shaped steel hoop plate and the right arc-shaped steel hoop plate;

the water stop is arranged on the surface of the bell and spigot gap, and is circumferentially adhered along the strip shape by taking the top of the inner wall of the pipe as a starting point.

Furthermore, the side surfaces of the first clamping hook and the second clamping hook in the vertical direction are respectively provided with a second screw hole, and the screw rod sequentially penetrates through the second screw holes to connect and fix the first clamping hook and the second clamping hook into a whole.

Further, the sealing device further comprises: a baffle plate;

the separation blade is located first pothook with between the second pothook, the separation blade is the ascending channel-section steel of opening, two sides of channel-section steel are provided with the round hole, the separation blade with left side arc hoop board with right side arc hoop board passes through the screw rod passes in proper order the second screw with the round hole is fixed together.

Further, the sealing device further comprises: an elastic washer;

the elastic washer is arranged between the water stop and the steel hoop plate along the circumferential direction of the water stop, so that the steel hoop plate is completely attached to and extrudes the water stop.

Further, the sealing device further comprises: a band plate supporter;

the hoop plate supporter is by following three spinal branch vaulting poles that steel hoop inboard radially set up are constituteed, the bracing piece includes the body of rod and extrusion piece, the top of the body of rod has the external screw thread, the inboard of extrusion piece has the internal thread, it is fixed that extrusion piece passes through threaded connection with the body of rod.

Furthermore, the bracing pieces are evenly arranged along the circumferential direction of the inner side of the steel hoop plate, the included angle between every two adjacent bracing pieces is 60 degrees, and the hoop plate support and the steel hoop plate are adjusted by screwing the extrusion block to extrude the hoop plate support to achieve the compactness of the steel hoop plate.

Further, the width of the steel hoop plate is larger than that of the water stop, and the width of the water stop is larger than that of the bell and spigot gap.

Further, the laying thickness of the water stop belt is less than 5 mm.

Further, the cross section of the steel hoop plate is corrugated.

The invention also provides a concrete bell and spigot pipe sealing method, which comprises the following steps:

step 1, cleaning the surface of the joint of the socket type concrete pipe:

step 1.1, cleaning floating soil affecting the adhesion of a water stop and the inner wall of a pipe in the inner surface of a bell and spigot gap within a range of +/-20 cm by using a bamboo broom;

step 1.2, removing dirt and sludge on the inner surface of the bell and spigot joint in a range of +/-20 cm from the running rainwater and sewage pipeline;

step 1.3, polishing the inner surfaces of the concrete pipes on the two sides of the bell and spigot gap by using a polishing machine, removing floating slurry and oil stains on the surfaces, removing a mortar layer with the thickness of 1mm on the surfaces and polishing burrs protruding from the surfaces;

step 2, adhering a water stop belt:

step 2.1, taking the top of the inner wall of the pipe as a starting point, and circumferentially sticking the water stop belt on the inner wall surface of the pipe at the spigot end along the strip-shaped bell and spigot gap;

step 2.2.1, before the waterproof sealant is solidified, laying and pressing the middle part of the water stop belt with the width of 16cm and the thickness of 1cm in alignment with the central line of the bell and spigot gap;

step 2.2, coating a layer of waterproof paint on the surface of the water stop, wherein the width of the waterproof paint is larger than that of the water stop;

step 2.3, brushing a layer of the waterproof sealant on the surface of the waterproof coating again;

step 3, mounting the steel hoop plate;

step 3.1, sequentially fixing the top ends of the left side arc-shaped steel hoop plate and the right side arc-shaped steel hoop plate to the top of the inner wall of the socket-end pipe body, keeping the distance between the left side connecting plate and the right side connecting plate within 50-100 mm, and installing the blocking piece between the left side arc-shaped steel hoop plate and the right side arc-shaped steel hoop plate;

3.2, penetrating the screw through the first screw hole, the second screw hole and the round hole in sequence from top to bottom, and respectively adjusting nuts for fixation;

step 3.3, mounting a fixed plate, and ensuring that two ends of the fixed plate are respectively buckled and fixed with the notches of the first clamping hook and the second clamping hook;

step 3.4, ensuring that the steel hoop plate completely covers the bell and spigot gap, and adjusting and confirming that the steel hoop plate completely presses the water stop belt at any time in the process of installing the hoop plate;

step 4, installing the hoop plate support:

step 4.1, performing anticorrosion treatment on the surface of the steel hoop plate to prevent sewage in the socket joint type concrete pipe from corroding the steel hoop plate;

step 4.2, erecting the hoop plate support in the pipe body to enable the hoop plate support to completely abut against the inner side of the steel hoop plate;

step 4.2.1, respectively screwing the extrusion blocks at the front ends of the support rods to enable the top ends of the extrusion blocks to be abutted against the inner surfaces of the steel hoop plates;

4.3, after the maintenance period of cement mortar injected before the step 1 is expired, dismantling the hoop plate support;

step 5, interface pressure testing is carried out:

step 5.1, pressure test holes are formed in pipe orifices of the female end and the spigot end of the socket concrete pipe;

step 5.2, injecting water into the pressure test hole, maintaining the pressure for a period of time, judging whether the pressure test is qualified according to whether the pressure is reduced, and executing step 5.3 if the pressure test is qualified;

and 5.3, sealing the pressure test hole, and performing a sealing process of a next pipe joint gap.

Further, before step 1, the surface of the joint of the socket concrete pipe is cleaned, the method further comprises the following steps: and after entering the pipeline, firstly confirming the damage and water leakage conditions of the bell and spigot gap, and plastering cement mortar in the circumferential direction according to the conditions for repairing.

Further, before step 2, the method further comprises: and before final setting of mortar at the bell and spigot joint, coating a layer of waterproof sealant on the surface of the bell and spigot joint.

Furthermore, for the water stop band with the width of the bell and spigot gap ranging from 20cm to 30cm, the water stop band with the width of 16cm and the thickness of 1cm can be laid in a superposed mode.

Further, step 3.4 of ensuring that the steel hoop plate completely covers the socket gap specifically includes: the screw rod penetrating through the first screw hole, the second screw hole and the round hole is adjusted to enable the steel hoop plate to expand outwards, and the left side arc-shaped steel hoop plate and the right side arc-shaped steel hoop plate are guaranteed to be evenly and outwards pressed against the water stop.

And further, step 5.2, testing pressure unqualified, re-checking sealing and performing interface pressure testing, and executing the steps 1 to 4 until all sections of lining steel pipes are completely installed.

Compared with the prior art, the invention has the following remarkable advantages:

1, the operation is simple. After the rubber water stop and the back-pressure steel hoop are well arranged in alignment with the joint of the pipeline, the tight adhesion of the rubber water stop and the joint can be controlled only by adjusting the bolt, and the problem of water leakage at the joint of the concrete pipe can be well solved by the method.

2, the efficiency is high. The technical process is simple, the nuts are cleaned, adhered, installed and screwed down, only manual operation is needed, and a skilled worker can finish sealing of a joint within 10 minutes.

3, the cost is low. The technology only needs to operate when one worker drills into the concrete pipeline, the device and the method are simple, the popularization is easy, the cost of excavation, maintenance, soil covering and backfilling of the larger earthwork is not needed, and therefore the wide application is easy to achieve.

4, wide application range. The technology is suitable for the construction technical fields of newly built pipelines of rainwater pipes, sewage pipes and water diversion pipes made of reinforced concrete materials, sealing and repairing of the pipelines and the like.

Drawings

FIG. 1 is a schematic view of the construction of the sealing device of the present invention;

FIG. 2 is a schematic sectional view taken along line A-A in FIG. 1;

FIG. 3 is a partially enlarged view of portion B of FIG. 1;

FIG. 4 is an enlarged view of a portion C of FIG. 1;

fig. 5 is a flow chart of the sealing method of the present invention.

Description of reference numerals:

1-steel hoop plate, 1.1-left side arc steel hoop plate, 1.2-right side arc steel hoop plate, 1.3-first hook, 1.4-second hook, 1.5-second screw hole; 2-connecting plate, 2.1-left connecting plate, 2.2-right connecting plate and 2.3-first screw hole; 3, fixing a plate; 4-screw rod; 5-water stop belt; 6-baffle plate, 6.1-round hole; 7-a bell and spigot joint gap; 8-spigot-and-socket concrete pipe, 8.1-spigot end, 8.2-socket end, 8.3-pipe body; 9-hoop plate support, 9.1-support rod, 9.1.1-rod body and 9.1.2-extrusion block.

Detailed Description

In order to make the technical solutions of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the drawings and the detailed description of the present specification.

The invention provides a sealing device of a concrete bell and spigot pipe, which is used for sealing a bell and spigot gap of a bell and spigot concrete pipe, and comprises: socket joint formula concrete pipe 8, steel hoop plate 1, connecting plate 2, fixed plate 3, screw rod 4, waterstop 5, separation blade 6 and hoop plate eyelidretractor 9.

As shown in fig. 2, the socket concrete pipe 8 includes a spigot end 8.1, a female end 8.2 and a pipe body 8.3, the inner surface of the female end 8.2 and the outer surface of the spigot end 8.1 are respectively provided with a rubber cushion layer (not shown in the figure), and the rubber cushion layers at the matching position of the female end 8.2 and the spigot end 8.1 mutually extrude and seal a gap outside the socket concrete pipe 8, so as to prevent the fluid in the pipe body 8.3 from leaking to the outside; as shown in fig. 1 and 2, the steel hoop plate 1 is disposed on the surface of a gap formed at the insertion position of the female end 8.2 and the male end 8.1, the steel hoop plate 1 comprises a left side arc steel hoop plate 1.1 and a right side arc steel hoop plate 1.2, the left side arc steel hoop plate 1.1 and the right side arc steel hoop plate 1.2 are both semicircular in shape, the left side arc steel hoop plate 1.1 and the right side arc steel hoop plate 1.2 are bilaterally and symmetrically disposed, the left side arc steel hoop plate 1.1 and the right side arc steel hoop plate 1.2 are disposed along the socket gap 7, the bottom end of the left side arc steel hoop plate 1.1 is provided with a groove-shaped first hook 1.3, the top end of the left side arc steel hoop plate 1.1 is fixed on the top of the inner wall of the male end 8.1 pipe body, the bottom end of the right side arc steel hoop plate 1.2 is provided with a second hook 1.4 disposed in the reverse direction to the first hook 1.3, the top end of the right side arc steel hoop plate 1.2 is fixed on the top end of the male end 8.1, and the left side arc steel hoop plate is matched with the inner wall of the male end 1.1, connecting plate 2 sets up in the inboard at steel hoop board 1 top, connecting plate 2 includes left side connecting plate 2.1 and right side connecting plate 2.2, left side connecting plate 2.1 and right side connecting plate 2.2 pass through welding mode fixed connection with left side arc steel hoop board 1.1 and right side arc steel hoop board 1.2's top respectively, left side connecting plate 2.1 and right side connecting plate 2.2's surface is provided with first screw 2.3 respectively, fixed plate 3 sets up in the top of first pothook 1.3 and second pothook 1.4, the both ends of fixed plate 3 are fixed with the notch lock of first pothook 1.3 and second pothook 1.4 respectively, screw rod 4 wears to establish the first screw 2.3 that is located left side connecting plate 2.1 and right side connecting plate 2.2 surface in proper order, with left side arc steel hoop board 1.1 and right side arc steel hoop board 1.2's disjunctor an organic whole that fuses, waterstop 5 sets up in the surface of bell and spigot gap 7, waterstop 5 uses the inside pipe wall top as the starting point, paste the gap along strip form bell and spigot gap circumference.

Further, as shown in fig. 3, the vertical side surfaces of the first hook 1.3 and the second hook 1.4 are respectively provided with a second screw hole 1.5, and the screw rod 4 sequentially passes through the second screw hole 1.5 to connect and fix the first hook 1.3 and the second hook 1.4 into a whole.

Further, as shown in fig. 4, the sealing device further includes a blocking piece 6, the blocking piece 6 is located between the first hook 1.3 and the first hook 1.4, the blocking piece 6 is a channel steel with an upward opening, two sides of the channel steel are provided with round holes 6.1, and the blocking piece 6 and the left-side arc-shaped steel hoop plate 1.1 and the right-side arc-shaped steel hoop plate 1.2 sequentially penetrate through the second screw hole 1.5 and the round holes 6.1 through the screw rod 4 to be fixed together.

Further, as shown in fig. 2, the sealing device further includes an elastic washer (not shown in the figure), which is interposed between the water stop 5 and the steel hoop plate 1 and disposed along the circumferential direction of the water stop 5, so that the steel hoop plate 1 completely adheres to and presses the water stop 5.

Further, as shown in fig. 1, the sealing device further includes a hoop plate supporter 9, the hoop plate supporter 9 is composed of three support rods 9.1 radially disposed along the inner side of the steel hoop plate 1, the support rods 9.1 include a rod body 9.1.1 and an extrusion block 9.1.2, the top end of the rod body 9.1.1 has an external thread (not shown in the figure), the inner side of the extrusion block 9.1.2 has an internal thread (not shown in the figure), and the extrusion block 9.1.2 is fixed to the rod body 9.1.1 through a threaded connection.

Furthermore, the supporting rods 9.1 are uniformly arranged along the inner side of the steel hoop plate 1 in the circumferential direction, the included angle between two adjacent supporting rods 9.1 is 60 degrees, and the compactness of the steel hoop plate 1 extruded by the hoop plate supporters 9 is adjusted by screwing the extruding blocks 9.1.2 between the hoop plate supporters 9 and the steel hoop plate 1.

Further, the width of the steel hoop plate 1 is larger than that of the water stop belt 5, and the width of the water stop belt 5 is larger than that of the bell and spigot gap 7.

Further, the laying thickness of the water stop 5 is less than 5 mm.

Further, the steel hoop plate 1 has a corrugated cross section.

The invention also provides a concrete bell and spigot pipe sealing method, which comprises the following steps:

step 1, cleaning the surface of the joint of the socket type concrete pipe 8:

step 1.1, cleaning floating soil on the inner surface of a bell and spigot gap 7 within a range of +/-20 cm, which influences the adhesion of a water stop 5 and the inner wall of a pipe, by using a bamboo broom;

step 1.2, removing dirt and sludge on the inner surface of the bell and spigot joint in a range of +/-20 cm from the running rainwater and sewage pipeline;

step 1.3, polishing the inner surfaces of the concrete pipes on the two sides of the bell and spigot gap 7 by using a polishing machine, removing floating slurry and oil stains on the surfaces, removing a mortar layer with the thickness of 1mm on the surfaces and polishing burrs protruding from the surfaces;

step 2, adhering a water stop belt 5:

step 2.1, taking the top of the inner wall of the pipe as a starting point, and circumferentially sticking a water stop strip 5 on the inner wall surface of the pipe at the spigot end 8.1 along a strip-shaped bell and spigot gap 7;

step 2.2.1, before the waterproof sealant is solidified, laying and pressing the middle part of a water stop 5 with the width of 16cm and the thickness of 1cm in alignment with the central line of a bell and spigot gap 7;

step 2.2, coating a layer of waterproof paint on the surface of the water stop 5, wherein the width of the waterproof paint is larger than that of the water stop 5;

step 2.3, brushing a layer of waterproof sealant on the surface of the waterproof coating again;

step 3, installing the steel hoop plate 1;

step 3.1, fixing the top ends of the left arc-shaped steel hoop plate 1.1 and the right arc-shaped steel hoop plate 1.2 to the top of the inner wall of the socket end 8.1 pipe body in sequence, keeping the distance between the left connecting plate 2.1 and the right connecting plate 2.2 within 50-100 mm, and installing the baffle 6 between the left arc-shaped steel hoop plate 1.1 and the right arc-shaped steel hoop plate 1.2;

3.2, passing the screw rod 4 through the first screw hole 2.3, the second screw hole 1.5 and the round hole 6.1 in sequence from top to bottom, and respectively adjusting the screw rod 4 to be fixed;

step 3.3, installing the fixed plate 3, and ensuring that two ends of the fixed plate 3 are respectively buckled and fixed with the notches of the first clamping hook 1.3 and the second clamping hook 1.4;

step 3.4, ensuring that the steel hoop plate 1 completely covers the bell and spigot gap 7, and adjusting and confirming that the steel hoop plate 1 completely presses the water stop 5 at any time in the hoop plate mounting process;

step 4, installing the hoop plate supporters 9:

step 4.1, performing anticorrosion treatment on the surface of the steel hoop plate 1 to prevent sewage in the socket joint type concrete pipe 8 from corroding the steel hoop plate 1;

step 4.2, erecting a hoop plate supporter 9 in the pipe body 8.3, and enabling the hoop plate supporter 9 to completely abut against the inner side of the steel hoop plate 1;

step 4.2.1, respectively screwing the extrusion blocks 9.1.2 at the front ends of the support rods 9.1 to enable the top ends of the extrusion blocks 9.1.2 to be abutted against the inner surface of the steel hoop plate 1;

step 4.3, after the maintenance period of the cement mortar injected before the step 1 expires, dismantling the hoop plate support;

step 5, interface pressure testing is carried out:

step 5.1, pressure testing holes (not shown in the figure) are arranged on pipe orifices of the female end 8.2 and the female end 8.1 of the socket type concrete pipe 8;

step 5.2, injecting water into the pressure test hole, maintaining the pressure for a period of time, judging whether the pressure test is qualified according to whether the pressure is reduced, and executing step 5.3 if the pressure test is qualified;

and 5.3, performing a sealing process of the next pipe joint gap. Otherwise, the sealing is checked again and the pressure test of the interface is carried out until all the sections of lining steel pipes are completely installed.

Further, before step 1, the surface of the joint of the socket concrete pipe 8 is cleaned, the method further comprises the following steps: after entering the pipeline, the damage and water leakage conditions of the bell and spigot gap 7 are firstly confirmed, and cement mortar is smeared along the circumferential direction of the bell and spigot gap 7 according to the conditions for repairing.

Further, before step 2, the method further comprises: before the mortar is finally set at the socket joint gap 7, a layer of waterproof sealant (not shown in the figure) is coated on the surface of the socket joint gap 7.

Furthermore, for the water stop strips 5 with the width of 16cm and the thickness of 1cm, the width of the bell and spigot gaps 7 ranges from 20cm to 30 cm.

Further, step 3.4 ensures that the steel hoop plate 1 completely covers the socket gap 7 specifically includes: the screw rod 4 passing through the first screw hole 2.3, the second screw hole 1.5 and the round hole 6.1 is adjusted to enable the steel hoop plate 1 to expand outwards, and the left side arc steel hoop plate 1.1 and the right side arc steel hoop plate 1.2 are guaranteed to evenly compress the water stop 5 outwards.

Further, if the pressure test is unqualified in the step 5.2, the step 1 to the step 4 are executed.

The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.