Large split nut mounting device and horizontal mounting method

Abstract

The present application relates to a large split nut mounting device and horizontal mounting method, the fixed block is fixed on the guide rail, the vertical jack is arranged on the fixed block, the base is fixed on the fixed block to form a rigid connection between the base and the guide rail, the height of the base in the vertical direction is adjusted through the long bolt and the vertical jack, the stop block is fixed on the first sliding block, the first sliding block is arranged in the guide groove of the base, the first sliding block moves along the transverse direction on the base, the second sliding block is connected with the first sliding block, the second sliding block is adjusted to different positions along the transverse direction on the first sliding block, the hydraulic support seat is fixed on the base, the base is adjusted to different positions along the transverse direction, the horizontal jack is located between the first sliding block and the hydraulic support seat, the adjusting bolt is arranged in the threaded hole of the second sliding block, the installation angle of the left half nut is finely adjusted, the adjusting screw is screwed in the threaded hole of the adjusting flange, the height of the support and the adjusting base is adjusted, and the large split nut can be quickly, safely and reliably mounted on the pipe body through the device.

Description

Technical Field

[0001] This invention belongs to the field of mechanical manufacturing technology and relates to a large-scale segmented nut installation device and horizontal installation method with a weight of over 4 tons, a diameter of over 1m, and a length of 0.7-1.2 meters. Background Technology

[0002] Large, segmented nuts are commonly used in the connection of segmented ultra-high pressure vessels, wind tunnels, and their high-pressure and ultra-high-pressure pipelines. They are characterized by their large weight and size, making assembly impossible using existing standard tools or equipment.

[0003] Segmented ultra-high pressure vessels are a new type of pressure vessel developed in recent years. With the advancement of science and technology, pressure vessels have gradually evolved from single-unit types to multi-segment types to meet the needs of scientific experiments and provide necessary data for certain experiments. This greatly shortens the product development cycle or serves as a reactor, significantly improving product production efficiency. Wind tunnel testing equipment uses artificial methods to generate and control airflow to simulate the flow of gas around aircraft or physical objects. It is a pipe-like device that can measure the effects of airflow on the object and observe physical phenomena. Collecting and analyzing real-world data from scaled-down models to identify and improve design flaws is the best approach for aerospace product design and manufacturing. Large wind tunnels are fundamental equipment for the development of large aerospace products. In these large facilities, connecting multiple pipe segments is an unavoidable issue. Efficiently connecting the pipe segments while ensuring safe and reliable connections is paramount. There are two methods for connecting pipe segments: flange connections and large nut connections, each with its own advantages and disadvantages.

[0004] Large split nuts refer to nuts that are divided into two halves along the axial direction of the nut, and then bolted together along the diameter of the nut at the outer circumference of the thread. The advantage of this method is that the nut can be directly snapped onto the pipe body after adjusting its installation position, and then the two halves of the nut can be connected with bolts. The threaded installation can be completed with a small rotation angle. Since the thread initiation angle of the nut and the pipe body is random, the angle of the two halves of the nut along the circumference of the nut is also random during the installation process.

[0005] To solve the above problems that occur during the installation of large segmented nuts, it is necessary to study a device and a horizontal installation method that can satisfy the installation angle of nuts. Summary of the Invention

[0006] The purpose of this invention is to overcome the shortcomings of the prior art and provide a device that can install nuts within an inclination angle range of 7°-65°, and a large-scale segmented nut installation device and horizontal installation method that can be installed efficiently, safely and reliably.

[0007] The objective of this invention is achieved as follows: A large segmented nut mounting device includes a guide rail as the foundation of the entire device, four fixing blocks that are bolted onto the guide rail, and a base mounted on the fixing blocks. The base is placed on four vertical jacks used to raise and lower the base and adjust and determine the vertical height of the base. The base is also installed on the fixing block by passing long bolts through the light holes on the base. A guide groove is provided in the middle of the base, and a first sliding block that moves horizontally is installed on the guide groove of the base; an installation hole is provided on the right side of the base, and an installation hole is also provided on the first sliding block. A bolt is installed between the installation hole of the first sliding block and the guide groove of the base to ensure that the first sliding block moves laterally in the guide groove of the base. A stop block is fixedly installed at one end of the first sliding block by bolts, and the two are rigidly connected. After the first sliding block is installed into the guide groove, the stop block and the first sliding block become one piece and slide in the guide groove. A second sliding block is installed at the other end of the first sliding block by bolts. The second sliding block is installed in the mounting hole of the first sliding block by bolts, ensuring that the second sliding block is fixed at different positions in the horizontal direction on the first sliding block, and ensuring that the second sliding block can be adjusted to different positions in the lateral direction. The hydraulic support base is fixed to the mounting holes on the base by bolts and is fixed at different positions along the horizontal direction, serving as the force point of the horizontal jack. The horizontal jack is located between the second sliding block and the hydraulic support base, providing horizontal movement power for the first sliding block. A right half nut is provided between the first and second sliding blocks, and the right half nut makes contact with both of them at two points. A threaded hole is opened on the second sliding block, and an adjusting bolt is installed in the threaded hole of the second sliding block. The installation angle of the right half nut can be finely adjusted by adjusting the adjusting bolt. An adjusting flange with a threaded hole is provided under the base, and an adjusting screw that supports and adjusts the height of the base is installed in the threaded hole of the adjusting flange.

[0008] Furthermore, the fixing block has an L-shaped structure, specifically with a semi-concave plane on one side, on which the vertical jack rests; a groove is formed at its bottom, and threaded holes are formed on both sides of the groove, allowing the fixing block to be secured to the guide rail by bolts tightened into the threaded holes; two threaded holes are formed at its top, through which two long bolts pass through the open holes on the base and connect to the threaded holes, fixing the base to the fixing block; the vertical jack is hoisted onto the semi-concave plane of the fixing block using a special lifting tool or a crane, with the vertical jack positioned relative to the fixing block at... In the free state, the fixed block acts as the foundation, with the bottom of the vertical jack resting on the semi-concave plane of the fixed block and its top supported on the bottom surface of the base. Initially, there is no rigid fixation between the base, the fixed block, and the vertical jack. The fixed block is used to improve the stability of the system and increase the bonding force between the fixed block and the foundation. After adjusting the height of the base with the vertical jack, tighten the eight long bolts that pass through the holes on the base to rigidly connect the base, the four vertical jacks, and the base together. That is, the base is installed and fixed on the fixed block, thereby stabilizing the system.

[0009] Furthermore, the guide groove consists of two steel plates welded to the upper surface of the base with a certain distance between them, perpendicular to the base and parallel to each other. The bottom of the guide groove is actually the upper surface of the base. The upper, front, and rear of the guide groove are all open structures. The first sliding block is installed into the guide groove from the upper part of the guide groove through a hoisting mechanism, or pushed into the guide groove from the front or rear direction of the guide groove.

[0010] A method for installing a large, segmented nut involves following these steps: Step 1) Install the fixing blocks: Fix the four fixing blocks (left, right, front, and back) to the guide rail with bolts; there are four fixing blocks in total, two on each side, and the bolts are tightened horizontally to fix the fixing blocks to the guide rail; Step 2) Install the vertical jacks: Place the vertical jacks on the fixed blocks and adjust them to the appropriate positions. There are four vertical jacks in total, two on each side. Step 3) Install the base: Install the base on the vertical jack, pass the long bolt through the hole in the base, screw it onto the fixing block, and tighten the long bolt to fix the base on the vertical jack; when installing the nut, adjust the center height of the base by adjusting the vertical jack and the screwed long bolt, and adjust the distance by 150mm. Step 4) Install the adjusting studs: Install the adjusting studs on the adjusting flange of the base. There are two adjusting studs, one on each side. The adjusting studs serve two purposes: first, to provide support, and second, to work with the hydraulic cylinder to adjust the center height of the base. Step 5) Install the baffle: Use bolts to install the baffle on the first sliding block; the function of the baffle is to block the bottom of the nut when adjusting the angle of the half nut, so as to complete the angle adjustment of the half nut; Step 6) Install the first sliding block: Place the first sliding block in the guide groove of the base; the function of the first sliding block is to adjust the horizontal movement of the half nut, with an adjustment distance of 200mm; Step 7) Install the second sliding block: Place the second sliding block on the first sliding block and fix it to the first sliding block with bolts; adjust the angle of the second sliding block and the first sliding block by adjusting the half nut; the adjustment distance of the second sliding block is 400mm, the adjustment method is non-linear, and the adjustment distance is 50mm each time. When the angle requires linear adjustment, the adjusting bolt on the second sliding block can be used to achieve this. Step 8) Install the hydraulic support seat: Place the hydraulic support seat on the base and fix it to the base with bolts; the hydraulic support seat provides a support point, and the horizontal movement of the first sliding block is adjusted by using a horizontal jack; Step 9) Install the right half nut: Hoist the right half nut into the space enclosed by the first sliding block and the second sliding block, adjust the center height of the base to a suitable position, make preliminary adjustments to the second sliding block, and then adjust the adjusting bolt on the second sliding block to adjust the right half nut to a suitable angle so that the right half nut is pressed onto the thread of the pipe body and fits tightly against the pipe body. Step 10) Install the left half nut: Hang the left half nut onto the thread of the pipe body, press it onto the pipe body, align the left and right halves of the nut, connect them together with bolts, and tighten the nut; Step 11) Adjust the vertical jack: Adjust the vertical jack to lower the height of the base and remove the installation device.

[0011] This invention has the following advantages: First, two pipe sections are mounted on a support, ensuring the pipes are aligned. The two pipe sections are initially separated by 0.7-1.2 meters. Then, a split-type nut device is placed on a guide rail below the pipe sections, positioned at the center of the distance between the end faces of the two pipe sections. The distance between the upper end face of the first sliding block and the center of the pipe is adjusted according to the diameter of the half-nut. The right half-nut is then placed on the first sliding block of the device. A horizontal jack is activated to slowly bring the right half-nut closer to the pipe thread. The alignment of the thread profile is observed, and the pipe is axially moved to align the thread profile with the pipe thread profile. The angle of the right half-nut is then finely adjusted using adjusting bolts. After the right half-nut is pressed onto the pipe thread, the left half-nut is hoisted onto the pipe thread and tightened. The two halves are then connected together using studs to form a complete nut, thus completing the installation of the split-type nut. This device allows for the quick, safe, and reliable installation of large split-type nuts onto pipes. Attached Figure Description

[0012] Figure 1 This is the assembly front view of the device of the present invention. (The external dimensions are 3225 x 2015 x 480 mm).

[0013] Figure 2 This is a left view of the assembly of the device of the present invention.

[0014] Figure 3 This is a front view of the fixing block 2 of the present invention.

[0015] Figure 4 This is a left view of the fixing block 2 of the present invention.

[0016] Figure 5 This is a front view of the base 11 of the present invention.

[0017] Figure 6 This is a top view of the base 11 of the present invention.

[0018] Figure 7 This is a front view of the stop 7 of the present invention.

[0019] Figure 8 This is a left view of the stop 7 of the present invention.

[0020] Figure 9 This is a front view of the first sliding block 8 of the present invention.

[0021] Figure 10 This is a top view of the first sliding block 8 of the present invention.

[0022] Figure 11 This is a front view of the second sliding block 9 of the present invention.

[0023] Figure 12 This is a left view of the second sliding block 9 of the present invention.

[0024] Figure 13 This is a front view of the hydraulic support base 13 of the present invention.

[0025] Figure 14 This is a left view of the hydraulic support base 13 of the present invention.

[0026] Figure 15 This is a front view of the adjusting screw 15 of the present invention. The names of the items in the diagram are as follows: 1-guide rail, 2-fixed block, 3-long bolt, 4-vertical jack, 5-left half nut, 6-pipe body, 7-stop block, 8-first sliding block, 9-second sliding block, 10-adjusting bolt, 11-base, 12-horizontal jack, 13-hydraulic support seat, 14-adjusting flange, 15-adjusting screw, 16-right half nut, 17-guide groove. Detailed Implementation

[0027] Example 1: As shown in the figure, a large segmented nut installation device includes a guide rail 1 as the foundation of the entire device, four fixing blocks 2 that are bolted onto the guide rail 1, and a base 11 installed on the fixing blocks 2. The base 11 is placed on four vertical jacks 4 used to raise and lower the base 11 and adjust and determine the vertical height of the base 11. The base 11 is also installed on the fixing block 2 by passing long bolts 3 through the light holes on the base 11. A guide groove 17 is provided in the middle of the base 11, and a first sliding block 8 that moves horizontally is installed on the guide groove 17 of the base 11; a mounting hole is provided on the right side of the base 11, and a mounting hole is also provided on the first sliding block 8. A bolt is installed between the mounting hole of the first sliding block 8 and the guide groove 17 of the base 11 to ensure that the first sliding block 8 moves laterally in the guide groove of the base 11. A stop block 7 is fixedly installed at one end of the first sliding block 8 by bolts, and the two are rigidly connected. After the first sliding block 8 is installed into the guide groove, the stop block 7 and the first sliding block 8 become one piece and slide in the guide groove. A second sliding block 9 is installed at the other end of the first sliding block 8 by bolts. The second sliding block 9 is installed in the mounting hole of the first sliding block 8 by bolts, ensuring that the second sliding block 9 is fixed at different positions in the horizontal direction on the first sliding block 8, and ensuring that the second sliding block 9 can be adjusted to different positions in the lateral direction. The hydraulic support base 13 is fixed in the mounting holes on the base 11 by bolts and is fixed at different positions in the horizontal direction, serving as the force point of the horizontal jack 12. The horizontal jack 12 is located between the second sliding block 9 and the hydraulic support base 13, providing horizontal movement power for the first sliding block 8. A right half nut 16 is provided between the first sliding block 8 and the second sliding block 9, and the right half nut 16 is in contact with both of them at two points. A threaded hole is opened on the second sliding block 9, and the adjusting bolt 10 is installed in the threaded hole of the second sliding block 9. The installation angle of the right half nut 16 is finely adjusted by adjusting the bolt 10. An adjusting flange 14 with a threaded hole is provided below the base 11, and an adjusting screw 15 for supporting and adjusting the height of the base 11 is installed in the threaded hole of the adjusting flange 14.

[0028] The fixing block 2 has an L-shaped structure, specifically with a semi-concave plane on one side, on which the vertical jack 4 rests. A groove is formed at its bottom, and threaded holes are formed on both sides of the groove. The fixing block 2 is secured to the guide rail 1 by bolts tightened into the threaded holes. Two threaded holes are formed at its upper part, and two long bolts 3 pass through the holes on the base 11 and connect to these threaded holes, fixing the base 11 to the fixing block 2. The vertical jack 4 is hoisted onto the semi-concave plane of the fixing block 2 using a special lifting tool or a crane. The vertical jack 4 is in a free state relative to the fixing block 2, thus securing it. Block 2 is equivalent to the foundation. The bottom of the vertical jack 4 is placed on the semi-concave plane of the fixed block 2, and its top is supported on the bottom surface of the base 11. In the initial state, there is no rigid fixation between the base 11, the fixed block 2, and the vertical jack 4. The fixed block 2 is used to improve the stability of the system and increase the covering force between it and the foundation. After adjusting the height of the base 11 by the vertical jack 4, tighten the eight long bolts 3 that pass through the holes on the base 11 to rigidly connect the base 11, the four vertical jacks 4, and the base 11 together. That is, the base 11 is installed and fixed on the fixed block 2, thereby stabilizing the system.

[0029] The guide groove 17 is composed of two steel plates that are perpendicular to the base 11 and parallel to each other and welded to the upper surface of the base 11 at a certain distance. The bottom of the guide groove is actually the upper surface of the base. The upper part, front and rear of the guide groove are all open structures. The first sliding block 8 is installed into the guide groove from the upper part of the guide groove through the hoisting mechanism, or pushed into the guide groove from the front and rear directions of the guide groove.

[0030] Figure 1 The detailed schematic diagram of this invention shows a large, segmented nut mounting device comprising four fixing blocks 2, which are secured to a guide rail 1, forming the foundation of the entire device. A base 11 rests on four vertical jacks 4, and eight long bolts 3 pass through holes in the base 11 to fix it to the fixing blocks 2. A stop block 7 is bolted to a first sliding block 8, which is positioned within a guide groove of the base 11 and can move horizontally. A second sliding block 9 is bolted to the first sliding block 8 and can be fixed at different positions horizontally. A hydraulic support 13 is bolted to the base 11 and can be fixed at different positions horizontally, serving as the point of application for a horizontal jack 12. The horizontal jack 12 is located between the second sliding block 9 and the hydraulic support 13, providing power for the horizontal movement of the first sliding block 8. During installation, the left half nut is positioned on the first sliding block 8 and the second sliding block 9, making contact with both at two points. The adjusting bolt 10 is installed in the threaded hole of the second sliding block 9, allowing for fine adjustment of the installation angle of the left half nut. The adjusting screw 15 is screwed into the threaded hole of the adjusting flange 14, serving to support and adjust the height of the base 11.

[0031] The installation uses a split nut with an outer diameter of φ1.2 meters, weighing 4.6 tons. Each half weighs approximately 2.3 tons. A total of 5 jacks are used: 4 vertical jacks and 1 horizontal jack. The vertical jack has a minimum height of 148 mm, a maximum height of 285 mm (adjustable range of 137 mm), a lifting capacity of 2 tons, and dimensions of 90 x 85 x 168 mm. The horizontal jack has a minimum height of 325 mm, a maximum height of 505 mm (adjustable range of 200 mm), a lifting capacity of 20 tons, and dimensions of φ128 x 325 mm. The installation center height is 1.5 meters.

[0032] The horizontal large-scale segmented nut mounting device includes a fixing block clamped on the guide rail 1; an adjustable base center height adjustable base height, adjustable by 150mm; a long bolt connected to the base, which can adjust the base center height and fix the base; a base that bears the weight of the entire device, with a guide groove designed on the base; a baffle placed at the front end of the sliding block, its function being to block the lower edge of the half nut to adjust the nut angle; a first sliding block 8 placed on the base guide groove, used to adjust the horizontal distance of the half nut, with an adjustment distance of 200mm; a second sliding block 9 placed on the first sliding block 8, used to adjust the angle and horizontal distance of the half nut, the angle being adjustable from 7° to 35°, and the horizontal distance adjustable by 200mm; a hydraulic support seat placed on the base, which mainly provides a reaction force for the horizontal jack to push the first sliding block 8 to move horizontally, the horizontal jack extending and retracting by 50mm each time; and an adjusting screw placed under the horizontal jack, which mainly serves a supporting function to ensure the stability of the entire system.

[0033] The implementation process of this invention is carried out according to the following steps: Step 1) Install the fixing blocks: Fix the four fixing blocks (left, right, front, and back) to the guide rail 1 with bolts; there are four fixing blocks in total, two on each side, and the bolts are tightened horizontally to fix the fixing blocks to the guide rail 1. Step 2) Install the vertical jacks: Place the vertical jacks on the fixed blocks and adjust them to the appropriate positions. There are four vertical jacks in total, two on each side. Step 3) Install the base: Install the base on the vertical jack 4, pass the long bolt through the hole in the base, screw it onto the fixing block, and tighten the long bolt to fix the base on the vertical jack 4; when installing the nut, adjust the center height of the base by adjusting the vertical jack 4 and the screwed long bolt, and adjust the distance by 150mm. Step 4) Install the adjusting studs: Install the adjusting studs on the adjusting flange of the base. There are two adjusting studs, one on each side. The adjusting studs serve two purposes: first, to provide support, and second, to work with the hydraulic cylinder to adjust the center height of the base. Step 5) Install the baffle: Use bolts to install the baffle on the first sliding block; the function of the baffle is to block the bottom of the nut when adjusting the angle of the half nut, so as to complete the angle adjustment of the half nut; Step 6) Install the first sliding block: Place the first sliding block in the guide groove of the base; the function of the first sliding block is to adjust the horizontal movement of the half nut, with an adjustment distance of 200mm; Step 7) Install the second sliding block: Place the second sliding block on the first sliding block and fix it to the first sliding block with bolts; adjust the angle of the second sliding block and the first sliding block by adjusting the half nut; the adjustment distance of the second sliding block is 400mm, the adjustment method is non-linear, and the adjustment distance is 50mm each time. When the angle requires linear adjustment, the adjusting bolt on the second sliding block can be used to achieve this. Step 8) Install the hydraulic support seat: Place the hydraulic support seat on the base and fix it to the base with bolts; the hydraulic support seat provides a support point, and the horizontal movement of the first sliding block is adjusted by using a horizontal jack; Step 9) Install the right half nut: Hoist the right half nut 16 into the space enclosed by the first sliding block and the second sliding block, adjust the center height of the base to a suitable position, make preliminary adjustments to the second sliding block, and then adjust the adjusting bolt on the second sliding block to adjust the right half nut 16 to a suitable angle so that the right half nut 16 is pressed onto the thread of the pipe body 6 and fits tightly against the pipe body 6. Step 10) Install the left half nut: Hang the left half nut onto the thread of the pipe body 6, press it onto the pipe body 6, align the left and right halves of the nut, connect them together with bolts, and tighten the nut; Step 11) Adjust vertical jack 4: Adjust vertical jack 4 to lower the height of the base and remove the installation device.

[0034] 1. Install the mounting device on the guide rail 1 according to steps 1) to 8); 2. Hoist the right half nut 16 onto the first sliding block 8 of the installation device, and adjust the angle between the right half nut 16 and the vertical plane to 27°; 3. Adjust the vertical jack 4 so that the center height of the right half nut 16 is 1.2 meters. During the rough adjustment, the center height of the right half nut 16 should be lower than the center height of the pipe body 6.

[0035] 4. Start the horizontal jack 12 to slowly bring the right half nut 16 closer to the pipe body 6. During this process, the vertical jack 4 needs to be adjusted so that the right half nut 16 is pressed onto the thread of the pipe body 6 at an angle of 27°.

[0036] 5. Hoist the left half nut 5 to the other end of the pipe body 6, press it onto the thread of the pipe body 6, and use bolts to connect the left and right nuts together to complete the installation of the nuts.

[0037] 6. Adjust the vertical jack 4 and the horizontal jack 12 to move the first sliding block 8 and the second sliding block 9 away from the nut, and remove the adjusting screw 15 and remove the installation device.

[0038] The four vertical jacks are used to adjust the vertical height of the base. The main function of the fixing blocks is to improve the stability of the system and increase the bonding force between the base and the foundation. After the height of the base is adjusted, the eight long bolts are tightened to rigidly connect the base, the four vertical jacks, and the base together, thereby stabilizing the system.

[0039] The guide groove consists of two parallel steel plates welded to the upper surface of the base at a certain distance from each other, perpendicular to the base. The bottom of the guide groove is actually the upper surface of the base. The upper, front, and rear of the guide groove are all open structures. The first sliding block 8 can be installed into the guide groove from the top of the guide groove via a hoisting mechanism, or it can be pushed into the guide groove from the front or rear. A stop block installed at one end of the first sliding block 8 is fixed to the first sliding block 8 with bolts. The two can be considered as a rigid connection. After the first sliding block 8 is installed into the guide groove, the stop block and the first sliding block 8 can be regarded as a single unit and can slide within the guide groove.

[0040] The hydraulic support base is fixed to the mounting holes on the base by bolts, and is fixed at different positions along the horizontal direction, serving as the force point of the horizontal jack. The horizontal jack is located between the second sliding block and the hydraulic support base, providing horizontal movement power for the first sliding block 8. A right half nut 16 is provided between the first sliding block 8 and the second sliding block 9, with the right half nut 16 in contact with both. A threaded hole is provided on the second sliding block 9, and an adjusting bolt is installed in the threaded hole of the second sliding block 9. The installation angle of the right half nut 16 is finely adjusted by adjusting the adjusting bolt. An adjusting flange with a threaded hole is provided under the base, and an adjusting screw for supporting and adjusting the height of the base is installed in the threaded hole of the adjusting flange. In addition to the long bolt connecting the fixed block and the base, a vertical jack is also provided between the fixed block and the base. The vertical jack is located on the step of the fixed block. The height of the base in the vertical direction is ensured by adjusting the length of the long bolt and the height of the vertical jack.

[0041] After fixing the device on the guide rail 1, hoist the right half nut 16 onto the first sliding block 8 of the device, and adjust the angle between the right half nut 16 and the vertical plane to a certain angle, which can only be adjusted from 7° to 65°. Adjust the vertical jack 4 to make the center height of the right half nut 16 reach a suitable height. During the rough adjustment, the center height of the right half nut 16 should be lower than the center height of the pipe body 6. Start the horizontal jack 12 to slowly bring the right half nut 16 closer to the pipe body 6. During this process, the vertical jack 4 needs to be adjusted so that the right half nut 16 is pressed into the thread of the pipe body 6 at a suitable angle. Lift the left half nut 5 to the other side of the pipe body 6, press it onto the thread of the pipe body 6, and use bolts to connect the left half nut 5 and the right half nut 16 together to complete the installation of the nuts; Adjust the vertical jack 4 and the horizontal jack 12 to move the first sliding block 8 and the second sliding block 9 away from the nut, remove the adjusting screw 15, and remove the installation device.

Claims

1. A large segmented nut mounting device, comprising a guide rail (1) serving as the foundation of the entire device, four fixing blocks (2) bolted onto the guide rail (1), and a base (11) mounted on the fixing blocks (2), characterized in that: The base (11) is placed on four vertical jacks (4) used to raise and lower the base (11) and adjust and determine the vertical height of the base (11). The base (11) is also installed on the fixing block (2) by passing long bolts (3) through the light holes on the base (11). A guide groove is provided in the middle of the base (11), and a first sliding block (8) that moves in the horizontal direction is installed on the guide groove of the base (11); an installation hole is provided on the right side of the base (11), and an installation hole is also provided on the first sliding block (8). A bolt is installed between the installation hole of the first sliding block (8) and the guide groove of the base (11) to ensure that the first sliding block (8) moves in the horizontal direction within the guide groove of the base (11); A stop block (7) is fixedly installed at one end of the first sliding block (8) by bolts. The two are rigidly connected. After the first sliding block (8) is installed into the guide groove, the stop block (7) and the first sliding block (8) become one piece and slide in the guide groove. A second sliding block (9) is installed at the other end of the first sliding block (8) by bolts. The second sliding block (9) is installed in the mounting hole of the first sliding block (8) by bolts, so as to ensure that the second sliding block (9) is fixed at different positions in the horizontal direction on the first sliding block (8) and to ensure that the second sliding block (9) can be adjusted to different positions in the transverse direction. The hydraulic support base (13) is fixed in the mounting hole on the base (11) by bolts and fixed in different positions along the horizontal direction, serving as the force point of the horizontal jack (12). The horizontal jack (12) is located between the second sliding block (9) and the hydraulic support base (13), providing horizontal movement power for the first sliding block (8). A right half nut (16) is provided between the first sliding block (8) and the second sliding block (9), and the right half nut (16) is in contact with the two points between them. A threaded hole is opened on the second sliding block (9), and the adjusting bolt (10) is installed in the threaded hole of the second sliding block (9). The installation angle of the right half nut (16) is finely adjusted by adjusting the bolt (10). An adjusting flange (14) with a threaded hole is provided below the base (11), and an adjusting screw (15) for supporting and adjusting the height of the base (11) is installed in the threaded hole of the adjusting flange (14).

2. The large segmented nut installation device according to claim 1, characterized in that: The fixed block (2) has an L-shaped structure, specifically with a semi-concave plane on one side, on which the vertical jack (4) sits. A groove is provided at its bottom, and threaded holes are provided on both sides of the groove. The fixed block (2) is secured to the guide rail (1) by bolts tightened into the threaded holes. Two threaded holes are provided at its upper part, and two long bolts (3) pass through the holes on the base (11) and connect to these threaded holes, fixing the base (11) to the fixed block (2). The vertical jack (4) is hoisted onto the semi-concave plane of the fixed block (2) using a special lifting tool or a crane. The vertical jack (4) is in a free state relative to the fixed block (2). The bottom of the vertical jack (4) is placed on the semi-concave plane of the fixing block (2), and its top is supported on the bottom surface of the base (11). In the initial state, there is no rigid fixation between the base (11), the fixing block (2), and the vertical jack (4). The fixing block (2) is used to improve the stability of the system and increase the covering force between it and the foundation. After adjusting the height of the base (11) by the vertical jack (4), tighten the eight long bolts (3) that pass through the light holes on the base (11) so that the base (11), the four vertical jacks (4), and the base (11) are rigidly connected together, that is, the base (11) is installed and fixed on the fixing block (2), thereby playing the role of stabilizing the system.

3. The large segmented nut installation device according to claim 1, characterized in that: The guide groove is two steel plates welded to the upper surface of the base (11) with a certain distance between them, perpendicular to the base (11) and parallel to each other. The bottom of the guide groove is actually the upper surface of the base. The upper part, front and rear of the guide groove are all open structures. The first sliding block (8) is installed into the guide groove from the upper part of the guide groove through the hoisting mechanism, or pushed into the guide groove from the front and rear directions of the guide groove.

4. A method for horizontal installation of a large segmented nut according to claim 1, characterized in that: The specific steps are as follows: Step 1) Install the fixing blocks: Fix the four fixing blocks on the left, right and front and back to the guide rail (1) with bolts; there are four fixing blocks in total, two on the left and two on the right. The bolts are tightened horizontally to fix the fixing blocks to the guide rail (1); Step 2) Install the vertical jacks: Place the vertical jacks on the fixed blocks and adjust them to the appropriate positions. There are four vertical jacks in total, two on each side. Step 3) Install the base: Install the base on the vertical jack, pass the long bolt through the hole in the base, screw it onto the fixing block, and tighten the long bolt to fix the base on the vertical jack; when installing the nut, adjust the center height of the base by adjusting the vertical jack and the screwed long bolt, and adjust the distance by 150mm. Step 4) Install the adjusting studs: Install the adjusting studs on the adjusting flange of the base. There are two adjusting studs, one on each side. The adjusting studs serve two purposes: first, to provide support, and second, to work with the hydraulic cylinder to adjust the center height of the base. Step 5) Install the baffle: Use bolts to install the baffle on the first sliding block; the function of the baffle is to block the bottom of the nut when adjusting the angle of the half nut, so as to complete the angle adjustment of the half nut; Step 6) Install the first sliding block: Place the first sliding block in the guide groove of the base; the function of the first sliding block is to adjust the horizontal movement of the half nut, with an adjustment distance of 200mm; Step 7) Install the second sliding block: Place the second sliding block on the first sliding block and fix it to the first sliding block with bolts; adjust the angle of the second sliding block and the first sliding block by adjusting the half nut; the adjustment distance of the second sliding block is 400mm, the adjustment method is non-linear, and the adjustment distance is 50mm each time. When the angle requires linear adjustment, the adjusting bolt on the second sliding block can be used to achieve this. Step 8) Install the hydraulic support seat: Place the hydraulic support seat on the base and fix it to the base with bolts; the hydraulic support seat provides a support point, and the horizontal movement of the first sliding block is adjusted by using a horizontal jack; Step 9) Install the right half nut: Hoist the right half nut into the space enclosed by the first sliding block and the second sliding block, adjust the center height of the base to a suitable position, make preliminary adjustments to the second sliding block, and then adjust the adjusting bolt on the second sliding block to adjust the right half nut to a suitable angle so that the right half nut is pressed onto the thread of the pipe body and fits tightly against the pipe body. Step 10) Install the left half nut: Hang the left half nut onto the thread of the pipe body, press it onto the pipe body, align the left and right halves of the nut, connect them together with bolts, and tighten the nut; Step 11) Adjust the vertical jack: Adjust the vertical jack to lower the height of the base and remove the installation device.

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