A main bolt tensioning practical operation and analysis platform and method

Abstract

The present application belongs to the technical field of mechanical design, and particularly relates to a main bolt stretching practical operation and analysis platform and method. The present application comprises a back baffle, a front baffle, a base, a threaded sleeve and a main bolt. The front baffle is connected with the base by welding, and the back baffle is connected with the base by welding. A plurality of through holes are formed in the front baffle, and a groove is formed in the back baffle at a position corresponding to the front baffle. The threaded sleeve is installed in the through hole and the groove, and the main bolt is screwed into the threaded sleeve from the side without thread. The present application provides an opportunity for a worker to simulate actual working conditions, solves the problem that a worker operating a bolt stretching machine is not familiar with the bolt stretching equipment as a whole and bolt stretching work, provides an accident and safety hazard practical operation and analysis platform, and reduces safety hazard problems in the working process.

Description

Technical Field

[0001] This invention belongs to the field of mechanical design technology, specifically relating to a platform and method for practical operation and analysis of main bolt tensioning. Background Technology

[0002] Rotating machinery generates vibrations during operation. Vibrations can cause the bolts used to fasten the equipment to loosen, resulting in a decrease in connection stiffness. The decrease in connection stiffness can lead to an increase in the vibration frequency and amplitude of the equipment, which in turn can cause problems such as wear of the rotating equipment bearings or rotor misalignment, resulting in equipment damage.

[0003] To ensure that bolts do not loosen due to vibration or changes in operating conditions during equipment operation, anti-loosening measures are taken for bolts. Common anti-loosening measures include the following: permanent anti-loosening (such as electric welding, riveting, bonding, etc.), friction anti-loosening (such as adding washers, self-locking nuts, double nuts, etc.), and mechanical anti-loosening (such as adding cotter pins, locking washers, etc.).

[0004] For large rotating equipment with large main bolt specifications, the above-mentioned anti-loosening methods may be inapplicable or have poor anti-loosening effect. For main bolts with large specifications, bolt tensioning is often used to lock and prevent loosening.

[0005] The principle of bolt tensioning: A tensioning cylinder is connected to the bolt. A high-pressure oil pump increases the pressure inside the tensioning cylinder, causing the bolt to be stretched within its elastic deformation zone. This results in a slight deformation of the bolt diameter and a slight increase in the thread pitch, making the bolt and nut easier to install and remove. Releasing the pressure from the tensioning cylinder allows the bolt deformation to return to its original state, thus achieving the purpose of preventing loosening.

[0006] The main problems currently existing in the tensioning operation of main bolts are as follows:

[0007] 1. Staff lack hands-on experience. Bolt stretching is a skill-based task, and currently, staff lack opportunities to practice under simulated working conditions.

[0008] 2. Bolt tensioning machines are specialized tools that require a high level of operator skill. Personnel new to bolt tensioning machines may not be able to operate them proficiently, which may increase safety risks.

[0009] 3. During the bolt tensioning process, the oil pressure provided by the oil pump is relatively high, which poses a risk of personal injury. A guidance training platform is needed to analyze various potential hazards in actual work. Summary of the Invention

[0010] The purpose of this invention is to provide a main bolt stretching platform, offering workers a hands-on opportunity to simulate actual working conditions; to solve the problem that workers operating bolt stretching machines are unfamiliar with the overall bolt stretching equipment and bolt stretching operations; and to provide a platform for actual operation and analysis of accidents and safety hazards, thereby reducing safety risks during the work process.

[0011] The technical solution adopted in this invention is as follows:

[0012] A main bolt tensioning operation and analysis platform includes a rear baffle, a front baffle, a base, a threaded sleeve, and a main bolt. The front baffle and the base are connected by welding, and the rear baffle and the base are connected by welding. The front baffle has several through holes, and the rear baffle has grooves at positions corresponding to the through holes of the front baffle. The threaded sleeve is installed in the through holes and the grooves, and the main bolt is screwed into the threaded sleeve from the unthreaded side.

[0013] One end of the threaded sleeve is threaded, and the other end is unthreaded. The threaded side is inserted into the groove of the rear baffle, and the unthreaded side is inserted into the through hole of the front baffle.

[0014] The outer walls at both ends of the threaded sleeve are provided with limiting bosses.

[0015] The threaded sleeve is limited to the rear baffle and the front baffle by a limiting boss, and the limiting boss is fixedly connected to the rear baffle and the front baffle by welding.

[0016] A washer and a nut are installed at one end of the main bolt that extends out of the threaded sleeve. A threaded protective cover is installed on the extended part. The extended part of the main bolt is connected to the bolt tensioning cylinder to realize the tensioning operation of the main bolt.

[0017] A specific method for using a main bolt tensioning platform includes the following steps:

[0018] Step 1: Remove the threaded protective cover and install the bolt tensioning cylinder; Step 2: Start the high-pressure oil pump and pressurize in multiple stages; Step 3: Measure the tension of the main bolt after each pressurization and tensioning; Step 4: Remove the main bolt nut and install or tighten the main bolt nut to reinstall the threaded protective cover.

[0019] In step one, after removing the threaded protective cover, clean the threads of the main bolt, place the bolt tensioning cylinder on the main bolt, adjust the position of the tensioning cylinder to ensure that the bolt tensioning cylinder and the main bolt are properly engaged, and connect the bolt tensioning cylinder oil pipe to the bolt tensioning cylinder.

[0020] In step two, the main bolt is tightened and stretched in multiple stages, with the pressure gradually increasing. When disassembling the main bolt, a single pressurization is used, with the pressure rising to a higher level in one go.

[0021] In step three, the main bolt is stretched multiple times during the stretching process. After each stretching, the main bolt data is measured to measure the amount of stretching and to verify whether the amount of stretching has reached the locking range, so as to avoid the bolt not being tightened properly.

[0022] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0023] (1) This invention provides a main bolt tensioning operation and analysis platform and method, which has a simple overall structure, is easy to operate and convenient to use;

[0024] (2) This invention provides a main bolt tensioning practice and analysis platform and method, which can be applied to main bolt tensioning training, has teaching value, can fully reflect the working principle of main bolt tensioning and the technical points in the main bolt tensioning process, and improve the theoretical knowledge and skills of operators.

[0025] (3) This invention provides a main bolt tensioning operation and analysis platform and method, which can effectively improve the proficiency of personnel in bolt tensioning operation;

[0026] (4) This invention provides a main bolt tensioning operation and analysis platform and method, which can be used as a comprehensive analysis platform for technical optimization and risk analysis of main bolt tensioning work, to analyze the safety problems that may exist in the main bolt tensioning process, and can also be used as a platform for testing the actual effect after the optimization of maintenance skills and techniques. Attached Figure Description

[0027] Figure 1 A three-dimensional perspective view of a main bolt tensioning platform provided by the present invention;

[0028] Figure 2 This is a front view of a main bolt tensioning platform provided by the present invention;

[0029] Figure 3 Left view of a main bolt tensioning platform provided by the present invention;

[0030] In the diagram: 1. Rear baffle, 2. Front baffle, 3. Base, 4. Threaded sleeve, 5. Main bolt, 6. Main bolt nut, 7. Threaded protective cover, 8. Washer. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0033] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0034] like Figure 1-3 As shown, the main bolt tensioning platform structure provided by the present invention includes: a rear baffle 1, a front baffle 2, a base 3, a threaded sleeve 4, a main bolt 5, a main bolt nut 6, a threaded protective cover 7, and a washer 8.

[0035] The front baffle 2 and the base 3 are connected by welding, and the rear baffle 1 and the base 3 are connected by welding. The front baffle 2 has several through holes, and the rear baffle 1 has a groove at the position corresponding to the through holes of the front baffle 2. The front baffle 2 and the rear baffle 1 are connected by a threaded sleeve 4. One end of the threaded sleeve 4 is a threaded side, and the other end is a non-threaded side. Both ends have a limiting boss on their outer walls. The threaded side is embedded in the groove of the rear baffle 1 and is limited by the limiting boss. The limiting boss is fixedly connected to the rear baffle 1 by welding. The non-threaded side is inserted into the through hole of the front baffle 2 and is limited by the limiting boss after insertion. The limiting boss is fixedly connected to the front baffle 2 by welding. The main bolt 5 is screwed into the threaded sleeve 4 from the non-threaded side. A washer 8 and a main bolt nut 6 are installed at the end of the main bolt 5 that extends out of the threaded sleeve 4. A threaded protective sleeve 7 is installed on the extended part of the main bolt 5. The extended part of the main bolt 5 cooperates with the bolt tensioning cylinder to stretch the main bolt 5 and tighten or loosen the main bolt nut 6.

[0036] This invention provides a specific method for using a main bolt tensioning platform, the method comprising the following steps:

[0037] Step 1: Remove the threaded protective cover 7 and install the bolt tensioning cylinder:

[0038] After removing the threaded protective cover 7, clean the threads of the main bolt 5, place the bolt tension cylinder on the main bolt, adjust the position of the tension cylinder to ensure that the bolt tension cylinder and the main bolt 5 are properly engaged, and connect the bolt tension cylinder oil pipe to the bolt tension cylinder.

[0039] Step 2: Start the high-pressure oil pump and pressurize in multiple stages:

[0040] The main bolt 5 is tightened by multiple tensioning and pressurization, with the pressure gradually increasing. When disassembling the main bolt 5, a single pressurization is usually used, with the pressure rising to a higher level at once. The oil pressure is high throughout the pressurization process, so it is necessary to pay attention to the pressure reading of the high-pressure oil pump. During the pressurization process, pay attention to whether there is any damage to the oil pipe and whether the connection is secure to reduce the risk of accidents.

[0041] Step 3: Measure the tensile amount of main bolt 5 after each application of pressure and tension.

[0042] The main bolt is stretched in multiple stages during the stretching process. After each stretching, the main bolt 5 should be measured to measure the stretching amount of the main bolt 5. This is to prevent the main bolt 5 from being subjected to excessive force, which would cause the deformation of the main bolt 5 to exceed the elastic deformation zone, resulting in the main bolt 5 becoming deformed and unable to recover, thus failing to achieve the purpose of bolt tightening. At the same time, it is verified whether the stretching amount has reached the tightening range to avoid the bolt not being tightened properly.

[0043] Step 4: Remove the main bolt nut 6, install or tighten the main bolt nut 6, and reinstall the threaded protective sleeve 7.

[0044] By providing a main bolt tensioning platform, based on the above-mentioned operating method, operators can be given the opportunity to operate under simulated working conditions. Through this device and hands-on training, the problem of operators being unfamiliar with bolt tensioning equipment and bolt tensioning operations can be effectively solved. This platform can be fully utilized as a testing platform to provide actual operation and analysis of accidents and safety hazards, using simulation to replace reality, timely exposure and analysis of accidents and hazards, and reduction of potential safety hazards in the work process.

[0045] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0046] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A master bolt tensioning practical operation and analysis platform, characterized in that: The utility model relates to a kind of rear baffle (1), front baffle (2), pedestal (3), threaded sleeve (4) and main bolt (5), front baffle (2) is connected with pedestal (3) by welding, rear baffle (1) is connected with pedestal (3) by welding, front baffle (2) is opened with several through holes, rear baffle (1) is opened with recess in the position corresponding with the through hole of front baffle (2), threaded sleeve (4) is installed in through hole and recess, main bolt (5) is screwed into threaded sleeve (4) from the through hole of front baffle (2);The one end of threaded sleeve (4) is threaded side, the other end is unthreaded side, threaded side is screwed into the recess of rear baffle (1);Unthreaded side is inserted into the through hole of front baffle (2);The outer wall of both ends of threaded sleeve (4) is equipped with limiting boss;Threaded sleeve (4) and rear baffle (1), front baffle (2) are limited by limiting boss respectively, limiting boss and rear baffle (1), front baffle (2) are fixedly connected by welding respectively;The one end of main bolt (5) that stretches out threaded sleeve (4) is installed with washer (8) and main bolt nut (6), stretched out portion is installed threaded protective cover (7), and main bolt (5) stretched out portion is connected with bolt stretching cylinder, to realize the stretching of main bolt (5).

2. The method of using a master bolt tensioning platform of claim 1, wherein: It comprises the following steps: Step one, remove threaded protective cover (7), install bolt stretching cylinder;Step two, start high-pressure oil pump, use bolt stretching cylinder to pressurize several times or adopt one-time pressurization;Step three, measure the stretching amount of main bolt (5) after each pressurization and stretching;Step four, remove main bolt nut (6) and place it in the maintenance site or tighten main bolt nut (6), and reinstall threaded protective cover (7).

3. The method of use of claim 2, wherein: In step one, clean the threads of main bolt (5) after removing threaded protective cover (7), place bolt stretching cylinder on main bolt (5), adjust the position of bolt stretching cylinder to ensure that bolt stretching cylinder cooperates with main bolt (5), and connect bolt stretching cylinder oil pipe to bolt stretching cylinder.

4. The method of use of claim 3, wherein: In step two, use multiple stretching methods when tightening main bolt (5), pressurize several times, and gradually increase the pressure;When disassembling main bolt (5), use one-time pressurization to increase the pressure to a high level at one time.

5. The method of use of claim 4, wherein: In step three, measure the stretching amount of main bolt (5) after each stretching in the process of stretching main bolt, and verify whether the stretching amount reaches the locking range to avoid insufficient tightening of the bolt.

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