阅读说明：本技术 一种用于t型接口球墨铸铁管的安装装置及其安装方法 (Mounting device and method for T-shaped interface nodular cast iron pipe ) 是由 纪斌 郭川 李亮 夏敦清 徐策 于 2020-04-13 设计创作，主要内容包括：本发明公开了一种用于T型接口球墨铸铁管的安装装置,包括带铰链的开口抱箍、动力钢块及动力螺杆、辅助钢块及辅助螺杆、动力光杆及套环和三节万向节,所述带铰链的开口抱箍由力矩输入抱箍及力矩输出抱箍组成,动力钢块由一个正旋螺纹孔钢块、一个反旋螺纹孔钢块、两个无螺纹通孔钢块组成,动力螺杆由一根正螺纹动力螺杆、一根反螺纹动力螺杆组成,辅助钢块由八个带无螺纹通孔的钢块组成,辅助螺杆由四根正螺纹螺杆组成,动力光杆共两个、套环共四个、三节万向节共两个。本装置结构合理简单、重量轻、操作空间需求小,相对于使用导链安装T型接口球墨铸铁管的传统安装方式,本装置操作更加方便、快捷、可靠,具有推广价值。(The invention discloses a mounting device for a T-shaped interface nodular cast iron pipe, which comprises an opening hoop with a hinge, a power steel block, a power screw rod, an auxiliary steel block, an auxiliary screw rod, a power polished rod, a sleeve ring and three universal joints, wherein the opening hoop with the hinge comprises a torque input hoop and a torque output hoop, the power steel block comprises a forward-rotation threaded hole steel block, a reverse-rotation threaded hole steel block and two unthreaded through hole steel blocks, the power screw rod comprises a forward-thread power screw rod and a reverse-thread power screw rod, the auxiliary steel block comprises eight steel blocks with unthreaded through holes, the auxiliary screw rod comprises four forward-thread screw rods, the number of the power polished rods is two, the number of the sleeve rings is four, and the number of the three universal joints is two. The device has the advantages of reasonable and simple structure, light weight and small operation space requirement, and compared with the traditional installation mode of installing the T-shaped interface nodular cast iron pipe by using the guide chain, the device is more convenient, quicker and more reliable to operate and has popularization value.)

1. The utility model provides an installation device for T type interface nodular cast-iron pipe, includes two opening staple bolts, two power polished rod (3), four lantern rings (4), two three section universal joints (8), four power steel blocks, eight supplementary steel blocks (14), two power screw rods, four supplementary screw rods (19) and a plurality of sets of bolt and nut, its characterized in that:

the opening hoop comprises a torque input hoop (17) and a torque output hoop (18), wherein the torque input hoop (17) and the torque output hoop (18) both comprise a hinge (26), the hinge (26) is positioned at the symmetrical position of the opening position on the hoop, the torque input hoop (17) and the torque output hoop (18) are fastened through a hoop fastening bolt (15) and a hoop fastening nut (16), the holes of the unthreaded through hole steel blocks (5) symmetrically welded on the torque input hoop (17) are concentric with the holes of the straight spiral hole steel blocks (11) and the reverse spiral hole steel blocks (12) symmetrically welded on the torque output hoop (18), and are parallel to a connecting line of the circle centers of the torque input hoop (17) and the torque output hoop (18);

the two power polish rods (3) are provided with a hexagonal wrench connecting port (24), a large cylindrical boss (25), a first cylindrical boss (21) and a limiting hole (6), the first cylindrical boss (21) is provided with a first through hole (27), the distance between a straight edge and a straight edge of the hexagonal wrench connecting port (24) is the same as the outer diameter of the power polish rods (3), the outer diameter of the large cylindrical boss (25) is larger than the outer diameter of the power polish rods (3), and the positioning hole (6) is provided with a limiting hole matched bolt and nut (7);

the inner diameter of the lantern ring (4) is larger than the outer diameter of the power polished rod (3), and the lantern ring can be freely sleeved in the power polished rod (3);

both ends of each three-section universal joint (8) are provided with a through hole (9) at the tail end of the three-section universal joint, four auxiliary screw rods (19) are provided with hexagonal wrench connecting ports (24), and both ends of each three-section universal joint (8) are hollow cylinders which are concave inwards;

the four power steel blocks are composed of two unthreaded through hole steel blocks (5), a forward spiral hole steel block (11) and a reverse spiral hole steel block (12), the two unthreaded through hole steel blocks (5) are symmetrically welded on a torque input hoop (17), the central connecting line of the two unthreaded through hole steel blocks (5) is vertical to the connecting line of an opening of the torque input hoop (17) and a hinge (26), the forward spiral hole steel block (11) and the reverse spiral hole steel block (12) are symmetrically welded on the torque output hoop (18), and the central connecting line of the forward spiral hole steel block (11) and the reverse spiral hole steel block (12) is vertical to the central connecting line of the opening of the torque output hoop (18) and the hinge (26);

the through holes of the eight auxiliary steel blocks (14) are all unthreaded and are symmetrically welded on two sides of the unthreaded through hole steel block (5), the forward spiral hole steel block (11) and the reverse spiral hole steel block (12) on the torque input anchor ear (17) and the torque output anchor ear (18) respectively;

the two power screw rods consist of a positive thread power screw rod (10) and a negative thread power screw rod (20), one end of the positive thread power screw rod (10) is provided with a second cylindrical boss (22) of a second through hole (28), and one end of the negative thread power screw rod (20) is provided with a third cylindrical boss (23) of a third through hole (29);

the four auxiliary screw rods (19) comprise a hexagonal wrench connecting port (24) and a matched nut (13), the four auxiliary screw rods (19) are all positive thread screw rods, and the diameters of the four auxiliary screw rods (19) are half of the diameters of the positive thread power screw rod (10) and the negative thread power screw rod (20).

2. A mounting method for a T-shaped interface nodular cast iron pipe is characterized by comprising the following steps: the installation method comprises the following use steps:

s1: selecting a hoop conforming to the outer diameter of the nodular cast iron pipe, installing a positive thread power screw (10) into a positive spiral hole steel block (11) on a torque output hoop (18), installing a reverse thread power screw (20) into a reverse spiral hole steel block (12) on the torque output hoop (18), sleeving one end of one three-section universal joint (8) into a second cylindrical boss (22) of the positive thread power screw (10), aligning a through hole (9) at the tail end of the three-section universal joint with a second through hole (28) on the second cylindrical boss (22), inserting a matched bolt and screwing the matched bolt with the nut, sleeving one end of the other three-section universal joint (8) into a third cylindrical boss (23) of the reverse thread power screw (20), aligning the through hole (9) at the tail end of the three-section universal joint with a third through hole (29) on the third cylindrical boss (23), inserting the matched bolt and screwing the matched bolt with the nut;

s2: the torque input hoop (17) and the torque output hoop (18) are sleeved into the bell mouth (2) and the socket (1) of the T-shaped interface nodular cast iron pipe or pipe fitting, the distance between the hoop and the ends of the bell mouth (2) and the socket (1) is adjusted, the socket (1) of the T-shaped interface nodular cast iron pipe can be completely inserted into the bell mouth (2) of the T-shaped interface nodular cast iron pipe, and the hoop fastening bolt (15) and the hoop fastening screw nut (16) on the torque output hoop (18) are screwed;

s3: sleeving a lantern ring (4) on each of the two power polished rods (3), then respectively penetrating the two power polished rods (3) into the unthreaded through-hole steel block (5) on the torque input hoop (17), respectively sleeving the other lantern ring (4) on each of the two power polished rods (3), inserting a first cylindrical boss (21) on each of the two power polished rods (3) into one end of the three-section universal joint (8), aligning a first through hole (27) on the first cylindrical boss (21) with a through hole (9) at the tail end of the three-section universal joint, and inserting and screwing a bolt and a matched nut;

s4: inserting a limit hole matching bolt and a nut (7) into a limit hole (6) on the power polished rod (3) and screwing the limit hole matching bolt and the nut, rotating and adjusting a torque input hoop (17) to enable the hole centers of four auxiliary steel blocks (14) on the torque input hoop (17) to correspond to the hole centers of four auxiliary steel blocks (14) on a torque output hoop (18), penetrating four auxiliary screw rods (19) into eight auxiliary steel blocks (14), sleeving an auxiliary screw rod matching nut (13) on the tail end of each auxiliary screw rod (19), and screwing a hoop fastening bolt (15) and a hoop fastening nut (16) on the torque input hoop (17);

s5: the torque is simultaneously rotated by a wrench to input the two power polished rods (3) on the hoop (17), the hoop drives the socket (1) of the T-shaped interface nodular cast iron pipe or pipe fitting, the socket (1) is inserted into the bell mouth (2), if the socket (1) deviates in the insertion process, the angle deviation between the axis of the socket (1) and the axis of the bell mouth (2) is large, the angle of the axis of the socket (1) and the angle of the axis of the bell mouth (2) are adjusted to be consistent by screwing auxiliary screw matched nuts (13) on four auxiliary screws (19), the torque is continuously rotated by the wrench to input the two power polished rods (3) on the hoop (17), and the angle between the axis of the socket (1) and the axis of the bell mouth (2) is timely adjusted by the four auxiliary screws (19) and the auxiliary screw matched nuts (13) until the insertion is completed.

Technical Field

The invention relates to the technical field of installation of nodular cast iron pipes, in particular to an installation device and an installation method for a T-shaped interface nodular cast iron pipe.

Background

The nodular cast iron pipe is usually applied to pipeline installation of water supply and drainage, gas and the like, the interface forms are various, the nodular cast iron pipe with a T-shaped interface is in a socket joint connection mode, a bell mouth and a spigot are sealed through a rubber sealing ring, the nodular cast iron pipe with the T-shaped interface is usually installed outdoors by adopting a guide chain, a crowbar, an excavator and the like, the nodular cast iron pipe with the T-shaped interface installed indoors is generally installed by adopting the guide chain, the traditional installation modes of the guide chain, the crowbar, the excavator and the like are adopted, the biggest difficulty is that the axial angle of the spigot and the axial angle of the bell mouth are inconsistent because the friction force of the spigot and the rubber ring is not uniform in the socket joint process of the pipeline/pipe, finally the pipeline or the pipe fitting is not in place and leaks, once the axial angle of the spigot and the bell mouth is inconsistent, the socket and the pipe fitting must be timely adjusted or removed and reinstalled, the process of adjustment or removal is difficult, long consuming time, and not conducive to accelerating the construction progress. The installation of the nodular cast iron pipe with the T-shaped interface indoors is limited by the stroke of the guide chain, and needs enough installation space, such as the areas with narrow indoor space and dense pipelines, such as socket joint of pipe fittings and pipe fittings, a pipe well and the like, and the installation of the nodular cast iron pipe with the T-shaped interface by using the guide chain is very difficult, and the manual efficiency reduction is serious. And the traditional mounting mode of installing the T-shaped interface nodular cast iron pipe by utilizing a guide chain, a crow bar, an excavator and the like is not favorable for later maintenance once the installation can not be disassembled.

Disclosure of Invention

In order to overcome the technical defects in the prior art, the invention provides a mounting device and a mounting method for a T-shaped joint nodular cast iron pipe, which are used for solving the problems of difficult socket joint mounting, difficult dismounting and low work efficiency of a pipe fitting and the pipe fitting in the construction process, particularly the construction process of the T-shaped joint nodular cast iron pipe.

The invention achieves the purpose through the following technical scheme, and the installation device for the T-shaped interface nodular cast iron pipe comprises two opening hoops, two power polished rods, four lantern rings, two three-section universal joints, four power steel blocks, eight auxiliary steel blocks, two power screw rods, four auxiliary screw rods, a plurality of sets of bolts and nuts.

The opening hoop consists of a torque input hoop and a torque output hoop, wherein the torque input hoop and the torque output hoop both comprise hinges, the hinges are positioned at the symmetrical positions of the opening positions on the hoops, the torque input hoop and the torque output hoop are fastened through hoop fastening bolts and hoop fastening nuts, holes of the symmetrically welded unthreaded through hole steel blocks on the torque input hoop are concentric with holes of the symmetrically welded forward spiral hole steel blocks and reverse spiral hole steel blocks on the torque output hoop, and the holes are parallel to a connecting line of the circle centers of the torque input hoop and the torque output hoop.

The two power polished rods are provided with a hexagonal wrench connecting port, a large cylindrical boss, a first cylindrical boss and a limiting hole, the first cylindrical boss is provided with a first through hole, the distance between a straight edge and a straight edge of the hexagonal wrench connecting port is the same as the outer diameter of the power polished rods, the outer diameter of the large cylindrical boss is larger than the outer diameter of the power polished rods, and the positioning hole is provided with a bolt and a nut matched with the limiting hole.

The inner diameter of the lantern ring is larger than the outer diameter of the power polished rod, and the lantern ring can be freely sleeved in the power polished rod.

The two ends of each three-section universal joint respectively comprise a through hole at the tail end of the three-section universal joint, the four auxiliary screw rods comprise hexagonal wrench connecting ports, and the two ends of each three-section universal joint are inwards concave cylindrical hollow bodies.

The four power steel blocks are composed of two unthreaded through hole steel blocks, a forward spiral hole steel block and a reverse spiral hole steel block, the two unthreaded through hole steel blocks are symmetrically welded on the torque input hoop, the central connecting line of the two unthreaded through hole steel blocks is vertical to the connecting line of the opening of the torque input hoop and the hinge, the forward spiral hole steel block and the reverse spiral hole steel block are symmetrically welded on the torque output hoop, and the central connecting line of the forward spiral hole steel block and the reverse spiral hole steel block is vertical to the connecting line of the opening of the torque output hoop and the hinge.

The through holes of the eight auxiliary steel blocks are all unthreaded and are symmetrically welded on two sides of the unthreaded through hole steel block, the forward spiral hole steel block and the reverse spiral hole steel block on the torque input anchor ear and the torque output anchor ear respectively.

The two power screw rods are composed of a positive thread power screw rod and a negative thread power screw rod, one end of the positive thread power screw rod is provided with a second cylindrical boss of the second through hole, and one end of the negative thread power screw rod is provided with a third cylindrical boss of the third through hole.

The four auxiliary screws comprise a hexagonal wrench connector and a matched nut, the four auxiliary screws are positive thread screws, and the diameters of the four auxiliary screws are half of the diameters of the positive thread power screws and the negative thread power screws.

The action principle of the auxiliary steel block and the auxiliary screw rod is as follows: when socket connection is carried out on the nodular cast iron pipe or pipe fitting with the T-shaped joint, when the axis of the bell mouth and the axis of the spigot deviate to cause that the bell mouth and the spigot are not concentric any more, the bell mouth and the spigot can be adjusted to be concentric by screwing the nut of one or more auxiliary screw rods, and the smooth installation process of the nodular cast iron pipe or pipe fitting is ensured.

A mounting method for a T-shaped interface nodular cast iron pipe comprises the following steps:

s1: selecting a hoop which meets the outer diameter of the nodular cast iron pipe, installing a positive thread power screw into a positive spiral hole steel block on a torque output hoop, installing a reverse thread power screw into a reverse spiral hole steel block on the torque output hoop, sleeving one end of one three-section universal joint into a second cylindrical boss of the positive thread power screw, aligning a through hole at the tail end of the three-section universal joint with a second through hole on the second cylindrical boss, inserting a matched bolt and screwing the matched bolt with a nut, sleeving one end of the other three-section universal joint into a third cylindrical boss of the reverse thread power screw, aligning the through hole at the tail end of the three-section universal joint with a third through hole on the third cylindrical boss, inserting the matched bolt and screwing the matched bolt with the nut;

s2: the torque input hoop and the torque output hoop are sleeved into a bell mouth and a socket of the T-shaped interface nodular cast iron pipe or pipe fitting, the distance between the hoop and the end parts of the bell mouth and the socket is adjusted, the socket of the T-shaped interface nodular cast iron pipe can be completely inserted into the bell mouth of the T-shaped interface nodular cast iron pipe, and a hoop fastening bolt and a hoop fastening screw nut on the torque output hoop are screwed;

s3: sleeving a lantern ring on each of the two power polished rods, penetrating the two power polished rods into the unthreaded through hole steel blocks on the torque input hoop, sleeving the other lantern ring on each of the two power polished rods, inserting a first cylindrical boss on each of the two power polished rods into one end of the three-section universal joint, aligning the first through hole on the first cylindrical boss with a through hole at the tail end of the three-section universal joint, inserting a bolt and a matched nut, and screwing;

s4: inserting and screwing a limit hole matching bolt and a nut into a limit hole on the power polished rod, rotating and adjusting the torque input hoop to enable the hole centers of four auxiliary steel blocks on the torque input hoop to correspond to the hole centers of four auxiliary steel blocks on the torque output hoop, penetrating four auxiliary screw rods into eight auxiliary steel blocks, sleeving an auxiliary screw rod matching nut on the tail end of each auxiliary screw rod, and screwing a hoop fastening bolt and a hoop fastening nut on the torque input hoop;

s5: the wrench is utilized to simultaneously rotate a wrench interface on the power polished rod, the positive thread power screw and the negative thread power screw are respectively screwed in or out of the positive spiral hole steel block and the negative spiral hole steel block, the positive thread power screw and the negative thread power screw close or separate the synchronous belt power moment input anchor ear and the moment output anchor ear, the nodular cast iron pipe or pipe fitting is tightly held by the power moment input anchor ear and the moment output anchor ear, the two anchor ears close or separate the nodular cast iron pipe or pipe fitting, and finally the insertion or the detachment of the nodular cast iron pipe or pipe fitting is realized.

Generally, compared with the prior art, the technical scheme of the invention can achieve the following beneficial effects: the mounting device for the T-shaped interface nodular cast iron pipe has the advantages of simple structure, light weight and small operation space requirement, so that the T-shaped interface nodular cast iron pipe and the pipe fitting can be mounted more conveniently, more reliably and more conveniently, and the T-shaped interface nodular cast iron pipe and the pipe fitting can be mounted and dismounted quickly, and the mounting device has popularization significance in engineering practice.

Drawings

The following detailed description of embodiments of the invention is provided in conjunction with the appended drawings, in which:

fig. 1 is a schematic structural diagram of a mounting device for a T-joint nodular cast iron pipe according to the invention;

FIG. 2 is a side view of FIG. 1;

FIG. 3 is a schematic structural view of the powered polished rod of the present invention;

FIG. 4 is a schematic structural diagram of a three-joint gimbal;

FIG. 5 is a schematic structural view of the positive thread power screw and the negative thread power screw of the present invention;

in the figure: 1-socket of nodular cast iron pipe with T-shaped interface, 2-socket of nodular cast iron pipe with T-shaped interface, 3-power polish rod, 4-lantern ring, 5-unthreaded through hole steel block, 6-limit hole, 7-limit hole matching bolt and nut, 8-three universal joint, 9-three universal joint end through hole, 10-positive thread power screw rod, 11-positive spiral hole steel block, 12-reverse spiral hole steel block, 13-matching nut, 14-auxiliary steel block, 15-anchor ear fastening bolt, 16-anchor ear fastening nut, 17-torque input anchor ear, 18-torque output anchor ear, 19-auxiliary screw rod, 20-reverse thread power screw rod, 21-first cylindrical boss, 22-second cylindrical boss, 23-third cylindrical boss, 24-hexagonal wrench interface, 25-large cylindrical boss, 26-hinge, 27-first through hole, 28-second through hole, 29-third through hole.

Detailed Description

As shown in figures 1 and 2, the device for rapidly installing the nodular cast iron pipe with the T-shaped interface comprises two open hoops, two power polished rods 3, four lantern rings 4, two three-section universal joints 8, four power steel blocks, eight auxiliary steel blocks 14, two power screw rods, four auxiliary screw rods 19, a plurality of bolts and nuts, wherein the open hoops comprise a torque input hoop 17 and a torque output hoop 18, the torque input hoop 17 and the torque output hoop 18 both comprise a hinge 26, the hinge 26 is positioned at the symmetrical position of the open position of the hoops, the torque input hoop 17 and the torque output hoop 18 are fastened through hoop fastening bolts 15 and hoop fastening nuts 16, holes of unthreaded through-hole steel blocks 5 symmetrically welded on the torque input hoop 17 and positive spiral hole steel blocks 11 symmetrically welded on the torque output hoop 18, The holes of the reverse spiral hole steel block 12 are concentric and parallel to a connecting line of the circle centers of the torque input hoop 17 and the torque output hoop 18.

Fig. 3 and 4 show a schematic diagram and a left side view of the powered polished rod 3 according to the present invention. The two power polished rods 3 are provided with a hexagonal wrench connecting port 24, a large cylindrical boss 25, a first cylindrical boss 21 and a limiting hole 6, the first cylindrical boss 21 is provided with a first through hole 27, the distance between the straight edge and the straight edge of the hexagonal wrench connecting port 24 is the same as the outer diameter of the power polished rods 3, the outer diameter of the large cylindrical boss 25 is larger than the outer diameter of the power polished rods 3, the positioning hole 6 is provided with a limiting hole matched bolt and nut 7, and the inner diameter of the lantern ring 4 is larger than the outer diameter of the power polished rods 3 and can be freely sleeved in the power polished rods 3.

Both ends of the three-section universal joint 8 respectively comprise a through hole 9 at the tail end of the three-section universal joint, the four auxiliary screw rods 19 comprise hexagonal wrench connecting ports 24, and both ends of each three-section universal joint 8 are concave cylindrical hollow bodies.

The four power steel blocks are composed of two unthreaded through hole steel blocks 5, a forward spiral hole steel block 11 and a reverse spiral hole steel block 12, the two unthreaded through hole steel blocks 5 are symmetrically welded on a torque input hoop 17, the central connecting line of the two unthreaded through hole steel blocks 5 is vertical to the connecting line of an opening of the torque input hoop 17 and a hinge 26, the forward spiral hole steel block 11 and the reverse spiral hole steel block 12 are symmetrically welded on a torque output hoop 18, and the central connecting line of the forward spiral hole steel block 11 and the reverse spiral hole steel block 12 is vertical to the connecting line of the opening of the torque output hoop 18 and the hinge 26.

The through holes of the eight auxiliary steel blocks 14 are all unthreaded and are symmetrically welded on two sides of the unthreaded through hole steel block 5, the forward spiral hole steel block 11 and the reverse spiral hole steel block 12 on the torque input hoop 17 and the torque output hoop 18 respectively.

The two power screws are composed of a positive thread power screw 10 and a negative thread power screw 20, as shown in fig. 5, which is a schematic structural diagram of the positive thread power screw 10 or the negative thread power screw 20 of the present invention, one end of the positive thread power screw 10 is provided with a second cylindrical boss 22 of a second through hole 28, and one end of the negative thread power screw 20 is provided with a third cylindrical boss 23 of a third through hole 29;

the four auxiliary screw rods 19 comprise a hexagonal wrench connecting port 24 and a matched nut 13, the four auxiliary screw rods 19 are all positive thread screw rods, and the diameters of the four auxiliary screw rods 19 are half of the diameters of the positive thread power screw rod 10 and the negative thread power screw rod 20.

When the quick installation device is used, the installation of the quick installation device for the nodular cast iron pipe with the T-shaped interface is completed mainly through the following steps:

the method comprises the following steps: selecting a hoop conforming to the outer diameter of the nodular cast iron pipe, installing a positive thread power screw 10 into a positive spiral hole steel block 11 on a torque output hoop 18, installing a reverse thread power screw 20 into a reverse spiral hole steel block 12 on the torque output hoop 18, sleeving one end of one three-section universal joint 8 on a small cylindrical boss 22 of the positive thread power screw 10, aligning a through hole 9 at the tail end of the three-section universal joint with a second through hole 28 on the second cylindrical boss 22, inserting a matched bolt and screwing by using a nut, sleeving one end of the other three-section universal joint 8 on a third cylindrical boss 23 of the reverse thread power screw 20, aligning the through hole 9 at the tail end of the three-section universal joint with a third through hole 29 on the third cylindrical boss 23, inserting the matched bolt and screwing by using a nut;

step two: the torque input anchor ear 17 and the torque output anchor ear 18 are sleeved into the bellmouth 2 and the socket 1 of the T-shaped interface nodular cast iron pipe or pipe fitting, the distance between the anchor ear and the end parts of the bellmouth 2 and the socket 1 is adjusted to ensure that the socket 1 can be completely inserted into the bellmouth 2, and the anchor ear fastening bolt 15 and the anchor ear fastening nut 16 on the torque output anchor ear 18 are screwed;

step three: sleeving a lantern ring 4 on each of the two power polished rods 3, then respectively penetrating the two power polished rods 3 into the unthreaded through-hole steel blocks 5 on the torque input hoop 17, sleeving the other lantern ring 4 on each of the two power polished rods 3, inserting the first cylindrical bosses 21 on the two power polished rods 3 into one ends of the three-section universal joints 8, aligning the first through holes 27 on the first cylindrical bosses 21 with the through holes 9 at the tail ends of the three-section universal joints 8, inserting bolts and matched nuts, and screwing;

step four: inserting a limit hole matching bolt and a nut 7 into a limit hole 6 on the power polished rod 3, screwing the limit hole matching bolt and the nut 7, rotating and adjusting a torque input hoop 17 to enable the hole centers of four auxiliary steel blocks 14 on the torque input hoop 17 to correspond to the hole centers of four auxiliary steel blocks 14 on a torque output hoop 18, penetrating four auxiliary screw rods 19 into eight auxiliary steel blocks 14, sleeving an auxiliary screw rod matching nut 13 on the tail end of each auxiliary screw rod 19, and screwing a hoop fastening bolt 15 and a hoop fastening bolt matching nut 16 on the torque input hoop 17;

step five: the torque is simultaneously rotated by a wrench to input the two power polished rods 3 on the hoop 17, the hoop drives the socket 1 of the T-shaped interface nodular cast iron pipe or pipe fitting, so that the socket 1 is inserted into the socket 2, if the socket 1 deviates in the insertion process, the angle deviation between the axis of the socket 1 and the axis of the socket 2 is large, the angles of the axis of the socket 1 and the axis of the socket 2 are adjusted to be consistent by screwing auxiliary screw matched nuts 13 on four auxiliary screws 19, the torque is continuously rotated by the wrench simultaneously to input the two power polished rods 3 on the hoop 17, and the angles between the axis of the socket 1 and the axis of the socket 2 are timely adjusted by the four auxiliary screws 19 and the auxiliary screw matched nuts 13 until the insertion is completed;

step six: when the T-shaped interface nodular cast iron pipe or pipe fitting needs to be disassembled, a wrench is used for reversely rotating torque to input two power polished rods 3 on the anchor ear 17, the anchor ear drives the socket 1 of the T-shaped interface nodular cast iron pipe or pipe fitting to be far away from the socket 2, and the angle between the axis of the socket 1 and the axis of the socket 2 is timely adjusted through the four auxiliary screws 19 and the auxiliary screw matched nuts 13 in the disassembling process until the disassembling is completed.

It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.